Walking miner
Publish: 2021-04-15 05:47:36
1.
2. Hello, it's very difficult to dig now. I can't dig one for several months. I can do stocks. Now the stocks are in the low position, so the chances are very big
3. 1、 Find problems and change students' understanding
in order to make students realize the importance of calculation, I first carried out an activity among students: let students collect the mistakes they often make in calculation, which can be carried out by each student himself or through group cooperation, and record the staggered questions after two weeks, including the reasons for the mistakes, It depends on who is looking for it seriously and who is looking for the wrong reason. When the students' enthusiasm is aroused, they shake off the problems:
(1) wrong reading, wrong ing and scribbling. 6 and 0, 1 and 7 are ambiguous
(2) when the column is vertical, the digits are not aligned
(3) do not draft when calculating
(4) one digit addition and subtraction calculation errors lead to errors in the whole question< There are two reasons for "carelessness" from the calculation errors of some students: one is that children's physical and psychological development is not mature enough, the other is that they have not formed good study habits. On the one hand, it is a natural growth process; on the other hand, it can be cultivated by corresponding methods. Therefore, while guiding students to analyze the reasons, it is necessary to highlight the cultivation of students' good learning habits, which is the key to improving their computing ability and the basic requirement of quality ecation< Second, cultivate students' good habit of calculation. Most of the mistakes in calculation are caused by careless, careless and scribbled writing. Therefore, a good calculation habit is the guarantee to improve the calculation ability. In the calculation training, students are required to do one look, two think, three calculate, four check
1. Look: it's serious. How can the result be correct if all the questions are copied wrong? Therefore, students are required to check with the original question or the previous formula in time when ing questions and calculating each step, so as to avoid ing wrong numbers or symbols. There are three points to be done: 1) check with the original question after ing the question; ② Check the numbers on the vertical type with those on the horizontal type; ③ Check the number in horizontal form with that in vertical form
2. When guiding students to do a calculation problem, they should not pick up a pen to do the calculation. They must first examine the problem, make clear what the problem should be calculated first and then, and whether there is a simple calculation method, then they can do the calculation. In addition, the calculation must be accurate first, and then fast
3. Calculation: to write and calculate carefully. The writing of assignments and exercises should be neat, not scribbled, and the format must be standardized. The writing of numbers, decimal points and operational symbols in the title should be especially standardized. There should be appropriate intervals between the numbers, and the vertical type on the draft should be aligned and organized. The calculation should be concentrated and not rush
4. After the calculation, we should first check whether the calculation method is reasonable; Secondly, check whether the numbers and symbols are copied wrong, and whether the decimal point is written wrongly or omitted; Thirdly, we should check and calculate every number and final result in the process of calculation. Therefore, it is an important way to cultivate good learning habits to prevent calculation errors and improve calculation ability< Third, to cultivate students' oral calculation ability and lay a solid foundation.
oral calculation is a calculation method that directly calculates the number by thinking and memory, which is an important part of calculation ability. Therefore, to improve students' calculation ability, we must lay a good foundation for oral calculation
1. In order to improve the accuracy and speed of students' oral arithmetic, I consciously ask students to memorize some special mathematical combinations according to their knowledge structure, such as sum is two numbers of whole ten and whole hundred (73 and 27, 98 and 2, etc.); The proct is two numbers (25) of the whole ten and the whole hundred × 4，125 × 8, etc.); The memory of these results is not only helpful to improve the accuracy of students' calculation, but also greatly improves the speed of students' calculation
2. Arrange exercises in each class. According to the teaching content and students' actual situation, each mathematics class chooses the appropriate time, arranges 3-5 minutes of oral arithmetic practice, and each student prepares a Book (daily practice of oral arithmetic). In this way, it is carried out for a long time, perseveres, and receives good results
3. For example: visual arithmetic training, listening arithmetic training, oral arithmetic, oral arithmetic games, "confrontation", "relay race" and so on, to improve students' adaptability< Fourth, strengthen the teaching of estimation. Estimation can cultivate students' sense of number, guide students to understand "operation" deeply, and help students check the correctness of calculation results. Estimation method can be used to locate the calculation results in advance and quickly determine the value range of calculation results, It can avoid mistakes caused by carelessness. Let the students look at the last digit of the result. If the indivial digits are 3 and 8, the sum of the indivial digits of the result must be 1, and the multiplication must be 4, such as 13 × In a word, the cultivation of students' computing ability should be carried out in the whole process of primary school mathematics teaching. We should not only strengthen the training of students' basic skills, but also pay attention to the targeted training of students. As long as we carefully study, constantly summarize and improve the work, and seriously dig out the ability factors in the calculation problems, the students' calculation ability will be improved.
in order to make students realize the importance of calculation, I first carried out an activity among students: let students collect the mistakes they often make in calculation, which can be carried out by each student himself or through group cooperation, and record the staggered questions after two weeks, including the reasons for the mistakes, It depends on who is looking for it seriously and who is looking for the wrong reason. When the students' enthusiasm is aroused, they shake off the problems:
(1) wrong reading, wrong ing and scribbling. 6 and 0, 1 and 7 are ambiguous
(2) when the column is vertical, the digits are not aligned
(3) do not draft when calculating
(4) one digit addition and subtraction calculation errors lead to errors in the whole question< There are two reasons for "carelessness" from the calculation errors of some students: one is that children's physical and psychological development is not mature enough, the other is that they have not formed good study habits. On the one hand, it is a natural growth process; on the other hand, it can be cultivated by corresponding methods. Therefore, while guiding students to analyze the reasons, it is necessary to highlight the cultivation of students' good learning habits, which is the key to improving their computing ability and the basic requirement of quality ecation< Second, cultivate students' good habit of calculation. Most of the mistakes in calculation are caused by careless, careless and scribbled writing. Therefore, a good calculation habit is the guarantee to improve the calculation ability. In the calculation training, students are required to do one look, two think, three calculate, four check
1. Look: it's serious. How can the result be correct if all the questions are copied wrong? Therefore, students are required to check with the original question or the previous formula in time when ing questions and calculating each step, so as to avoid ing wrong numbers or symbols. There are three points to be done: 1) check with the original question after ing the question; ② Check the numbers on the vertical type with those on the horizontal type; ③ Check the number in horizontal form with that in vertical form
2. When guiding students to do a calculation problem, they should not pick up a pen to do the calculation. They must first examine the problem, make clear what the problem should be calculated first and then, and whether there is a simple calculation method, then they can do the calculation. In addition, the calculation must be accurate first, and then fast
3. Calculation: to write and calculate carefully. The writing of assignments and exercises should be neat, not scribbled, and the format must be standardized. The writing of numbers, decimal points and operational symbols in the title should be especially standardized. There should be appropriate intervals between the numbers, and the vertical type on the draft should be aligned and organized. The calculation should be concentrated and not rush
4. After the calculation, we should first check whether the calculation method is reasonable; Secondly, check whether the numbers and symbols are copied wrong, and whether the decimal point is written wrongly or omitted; Thirdly, we should check and calculate every number and final result in the process of calculation. Therefore, it is an important way to cultivate good learning habits to prevent calculation errors and improve calculation ability< Third, to cultivate students' oral calculation ability and lay a solid foundation.
oral calculation is a calculation method that directly calculates the number by thinking and memory, which is an important part of calculation ability. Therefore, to improve students' calculation ability, we must lay a good foundation for oral calculation
1. In order to improve the accuracy and speed of students' oral arithmetic, I consciously ask students to memorize some special mathematical combinations according to their knowledge structure, such as sum is two numbers of whole ten and whole hundred (73 and 27, 98 and 2, etc.); The proct is two numbers (25) of the whole ten and the whole hundred × 4，125 × 8, etc.); The memory of these results is not only helpful to improve the accuracy of students' calculation, but also greatly improves the speed of students' calculation
2. Arrange exercises in each class. According to the teaching content and students' actual situation, each mathematics class chooses the appropriate time, arranges 3-5 minutes of oral arithmetic practice, and each student prepares a Book (daily practice of oral arithmetic). In this way, it is carried out for a long time, perseveres, and receives good results
3. For example: visual arithmetic training, listening arithmetic training, oral arithmetic, oral arithmetic games, "confrontation", "relay race" and so on, to improve students' adaptability< Fourth, strengthen the teaching of estimation. Estimation can cultivate students' sense of number, guide students to understand "operation" deeply, and help students check the correctness of calculation results. Estimation method can be used to locate the calculation results in advance and quickly determine the value range of calculation results, It can avoid mistakes caused by carelessness. Let the students look at the last digit of the result. If the indivial digits are 3 and 8, the sum of the indivial digits of the result must be 1, and the multiplication must be 4, such as 13 × In a word, the cultivation of students' computing ability should be carried out in the whole process of primary school mathematics teaching. We should not only strengthen the training of students' basic skills, but also pay attention to the targeted training of students. As long as we carefully study, constantly summarize and improve the work, and seriously dig out the ability factors in the calculation problems, the students' calculation ability will be improved.
4.
There are small, medium and large rotary drilling rigs. The models of rotary excavators are xr46d and sr150c
Rotary drilling machine: it can be used to drill rock with hardness coefficient f ≤ 6 in open-pit mine, and can also drill hard interlayer rock with hardness coefficient f = 7-11. When drilling, the rotary torque and axial pressure are applied to make the bit rotate and feed to cut the rock Rotary drilling rig: construction machinery suitable for hole forming operation in building foundation engineering. It is mainly suitable for the construction of sandy soil, cohesive soil, silty soil and other soil layers, and is widely used in the construction of cast-in-place pile, continuous wall, foundation reinforcement and other foundation Rotary drilling machine: it is used to drill the rock with hardness coefficient f ≤ 6 in open-pit mine, and it can also drill the hard interlayer rock with hardness coefficient f = 7-11. When drilling, the rotary torque and axial pressure are applied to make the bit rotate and feed to cut the rock2. Rotary drilling rig: hydraulic crawler type telescopic chassis, self lifting and falling foldable drilling mast, telescopic drill pipe, with verticality automatic detection and adjustment, digital display of hole depth, etc. the whole machine is generally operated by hydraulic pilot control and load sensing, with the characteristics of light operation and comfort. The main winch and the auxiliary winch can be applied to various situations of the construction site
Rotary drilling machine: in the construction of large-diameter cast-in-place pile in high-rise buildings, ports, dams, bridge foundation projects, the construction of rotary drilling machine bored pile has the advantages of convenient operation, safety and reliability, strong adaptability, low cost, high drilling efficiency, good hole wall stability, etc, For the cast-in-place pile construction can play a better role in promoting Rotary drilling rig: it has obvious advantages and strong applicability in the construction of bored pile in subway engineering; High degree of automation, low labor intensity; High drilling efficiency; The pile quality is good; The environmental pollution is small. It can significantly improve the efficiency and quality of engineering construction. In the reasonable selection of construction methods and construction technology, it can save material, financial, human and other resources to the greatest extent5. Edison's mother found that Edison was missing. At night, she found that Edison was incubating eggs in the chicken house. It turned out that he wanted to know if people could incubate eggs.
6. Edison was born at three o'clock in the morning on February 11, 1847. His father also took him to the street to boast to others. Everyone called him al. When he was a child, Edison was very fond of asking questions and often asked some strange questions, which made people feel very annoyed. His family and pedestrians were the objects of his questions, If he is dissatisfied with the alt's reply, he will go to the experiment in person. For example, once al saw the goose in the goose house hatching, he asked his mother why the goose always sat there all day? His mother told him that the goose was hatching, and Al thought that if the goose could, so could I. after a few days, mom and dad found that Al had been squatting in the wood room, and they didn't know what he was doing. When the family found that Al was hatching, everyone burst into laughter
when he was eight years old, Al went to primary school, but he dropped out of school after only three months. When Al was in class, his mother was often called to the school to talk to the teacher. This is because al often asked some strange questions that the teacher thought he was a child with low ability, so his mother decided to teach Al by herself, And determined to teach al to be a great genius, so al began his self-study course. Al was well taught by his mother. Later, Al was allowed to set up a laboratory in the basement. In order not to let others tamper with his experimental procts, Al also came up with a clever plan, that is, to put poison labels on the bottles of each experimental proct
one morning when he was 12 years old, Al suddenly said to his mother, "Mom, I want to sell newspapers, OK?"? After hearing this, mom was shocked and dad was angry. But after al's repeated requests, his parents finally agreed. He happily ran to the railway company and got permission to sell newspapers on the train. It's 100 kilometers from Xiulun port to Detroit. After al worked as a newsboy on the train for several months, he opened two stores in Detroit, One of them is selling magazines, the other is selling vegetables, fruits, cream, etc. He also hired two teenagers to help look at the shop, and agreed to share the bonus with them. Soon after, another train was added to the railway, and Al sent a newsboy to sell with the car. In this way, a 12-year-old Newsboy did not know whether he had become a young capitalist.
when he was eight years old, Al went to primary school, but he dropped out of school after only three months. When Al was in class, his mother was often called to the school to talk to the teacher. This is because al often asked some strange questions that the teacher thought he was a child with low ability, so his mother decided to teach Al by herself, And determined to teach al to be a great genius, so al began his self-study course. Al was well taught by his mother. Later, Al was allowed to set up a laboratory in the basement. In order not to let others tamper with his experimental procts, Al also came up with a clever plan, that is, to put poison labels on the bottles of each experimental proct
one morning when he was 12 years old, Al suddenly said to his mother, "Mom, I want to sell newspapers, OK?"? After hearing this, mom was shocked and dad was angry. But after al's repeated requests, his parents finally agreed. He happily ran to the railway company and got permission to sell newspapers on the train. It's 100 kilometers from Xiulun port to Detroit. After al worked as a newsboy on the train for several months, he opened two stores in Detroit, One of them is selling magazines, the other is selling vegetables, fruits, cream, etc. He also hired two teenagers to help look at the shop, and agreed to share the bonus with them. Soon after, another train was added to the railway, and Al sent a newsboy to sell with the car. In this way, a 12-year-old Newsboy did not know whether he had become a young capitalist.
7. The story of Edison
Edison only went to primary school for three months in his life. His knowledge came from his mother's teaching and self-study. His success should be attributed to his mother's understanding and patient teaching since childhood, which made Edison, who was originally regarded as an incompetent child, become a world-famous "king of invention" when he grew up
Edison was curious about many things since he was a child, and he liked to experiment with them himself until he understood the truth. When he grew up, he devoted himself to research and invention according to his own interests. He set up a laboratory in New Jersey and invented more than 2000 kinds of things in his life, such as electric lamp, telegraph, phonograph, video camera, magnetic separator, crusher and so on. Edison's strong research spirit made him make great contribution to the improvement of human life style
"waste, the biggest waste is to waste time." Edison often said to his assistant“ Life is too short. Think more and do more with less time. "
one day, Edison was working in the laboratory. He handed his assistant an empty glass bulb without a light port and said, "you measure the capacity of the bulb." He bowed his head to work again
after a long time, he asked, "what's the capacity?" He didn't hear the answer. He turned his head and saw his assistant measuring the perimeter and inclination of the bulb with a tape measure. He took the measured number and put it on the table to calculate. He said, "time, time, how do you spend so much time?" Edison came over, picked up the empty light bulb, filled it with water, handed it to his assistant, and said, "pour the water in the measuring glass, and tell me its capacity right away."
the assistant immediately read out the number
Edison said, "what an easy way to measure. It's accurate and time-saving. Why can't you think of it? Is it not a waste of time? "
the assistant blushed
Edison murmured: "life is too short, too short. Save time and do more things!"< Before he became famous, Edison was a poor worker. Once, his old friend met him in the street and said with concern, "look, this overcoat on you is not in good condition. You should replace it with a new one."
"do you need it? No one knows me in New York Edison answered with indifference
a few years later, Eddie has become a great inventor< One day, Edison met his friend on the street of New York“ "Oh," exclaimed the friend, "Why are you still wearing this old coat? This time, you need a new one anyway
"do you need it? Everyone here already knows me. " Edison still answered with indifference<
the story of Edison
one snowy night, Edison's mother suddenly fell ill, and his father rushed to the doctor. The doctor said, "your mother has acute appendicitis and needs an operation.". At that time, there was only oil lamp, but no electric lamp. The light of the oil lamp was very dark, and it would be wrong if you were not careful. Edison suddenly thought of a good way, he took out all the oil lamps at home, and then put a mirror behind the oil lamp to let the doctor finish the operation smoothly. The doctor said, "son, you saved your mother with your wisdom and cleverness." Edison took his mother's hand and said, "Mom, I want to make a night's sun."< One morning in the autumn of 1877, Edison came to a magazine editorial office in New York from a place called Merlot in the United States. He carefully held a little thing with a strange shape. The little thing has a long metal bar on it, a big wheel on one end and a small handle on the other. Edison swung his hand, then
wrapped a small piece of tin foil in the cylinder, put on a small needle, and sang a baby hypnotic song to the cylinder. After the action, the machine starts to rotate again, and it sings the hypnotic song again word for word. It's not enough to describe the first feeling of those present at that time. People were overjoyed. All the people in the editorial department told each other that Edison had brought a talking monster. In a short period of time, journalists from all the newspapers in the city rushed to see the most novel machine in the world. Once this invention came out, it aroused the rapid and huge fanaticism of the society at that time for several months. Railway special train to visit
view. Many people began to disbelieve this invention, suspecting that he was hiding something that could speak in it to deceive people. The bishop of a church recited a series of special terms in the Bible to the radio at the highest speed. When these terms were repeated from the machine word by word, they believed that there was nothing false about them
this is what happened when the world's first phonograph came out. People in praise, said the inventor Edison is a "demon". In fact, the nickname of "demon" is far from the invention of gramophone, but it accompanies his whole life. Because he has too many inventions. Electric light, telephone, movie, telegraph, power generator, battery, typewriter, magnetite separator, pressure gauge and so on are all his inventions. According to incomplete statistics, from 1869, when he invented the first automatic counting machine, to 1910, he obtained a total of 1328 invention patents. During this period, he had one invention every 11 days. Because of this, it is natural for him to be called "demon"
but where does the real magic of this "demon" come from? He himself said, "one percent inspiration, ninety-nine percent perspiration." Tenacious perseverance and amazing
diligence are his real "magic power"< Thomas Edison was born in 1847 in the state of Warsaw. He only went to primary school for three months. The school teacher said that he was "stupid", and his relatives and friends all called him
that. But his mother didn't believe it. She was his teacher and guided him to read some books. Before he was 12 years old, he had read many difficult books, and his father led him to study Newton's principle. Family ecation and influence, so that he developed a spirit of diligence and amazing perseverance
Edison loved science. When he was very young, he stored hundreds of bottles for various experiments in his cellar and built a small laboratory. He spent all the money he saved on his daily life on chemical supplies and instruments. But this money alone can not meet the needs of the experiment, so he went to the train as a newsboy. He gets on the bus in the morning and goes home after nine o'clock in the evening. After the experiment, he often takes a rest late at night. Later, he found that there was a smoking room in the luggage compartment of the train that was not used, so he moved the test objects in the cellar of his home to this room and insisted on doing chemical experiments. Here, he also learned to use a printer set up here, and was able to record the local news with a telegraph number, and ran a newspaper. The newspaper was so popular that it sold well that he was only twelve years old. One day, the train shakes, the luggage slides down, and one of his phosphorus poles falls to the ground
and the carriage catches fire immediately. The fire was put out by the people who rushed to the scene, but the conctor deafened him and disabled him for life. The conctor also kicked everything in his "four wheel lab" and "travel printing room" under the car< The difficulties and setbacks did not affect Edison's determination to carry out scientific experiments, so he built a laboratory at home. It is common in experiments that clothes are beaten and burned by electricity. Once, his face was burnt out by nitric acid. Even so, he never lost heart. Edison's earliest efforts greatly contributed to his later inventions. However,
like other great inventors, Edison's road was not smooth. He worked as a night telegraph student. Spend a lot of energy in bookstores and libraries. However, e to the loss of
career for several times, I finally had to go to New York to join my friends
Edison came to New York after a lot of hardships. At this time, he didn't even have a penny in his pocket. He was so hungry that he had to ask for some tea, which was his first meal in Newcastle. Here, he found a friend for a long time, but his friend is also unemployed. Edison, who suffered from hunger, was humble and shabby, and could not afford to be seen. Later, he was allowed to stay overnight in a battery room. It happened that a communication machine was set up in the room to release the market price. On the morning of the third day when he arrived, the machine was out of trouble. Because he paid attention to it, he quickly helped others repair the machine and was left behind. Then he found a job. Since then, he has made great efforts to cooperate with others in the reform of the market price communication machine. Soon, he opened a small factory to proce this kind of communication machine, and graally embarked on the road of scientific research<
solid steps
it's not surprising that electric lights are used today. But before 1880, electric light had only its rudiment, which was the most popular arc light at that time. This kind of lamp is connected with two charcoal on the heads of the two poles of the battery. After the battery is electrified, the two poles are touched, and then they are separated, and a flame immediately occurs between the two poles. Because the two carbon poles are horizontal and there is hot air rising in the middle, the flame between the two poles will bend upward slightly, like a bow or arc, so it is called arc lamp. This kind of lamp has many disadvantages: it needs to change the carbon strips constantly; The sound is loud; The lighting effect
is small and easy to damage the eyesight. Dirty air; Another big drawback is that a return current can only light an arc lamp. At that time, some famous scientists, including the inventor of arc lamp, did not always praise this kind of lamp. However, in 1877, Edison began to reform the arc lamp experiment, and proposed to divide the current (that is, one port current points many lamps), and change the arc
light to white light. The experiment should be satisfactory. It is necessary to find a kind of material that can burn to white heat to make filament, and this kind of filament needs to withstand the combustion of heat at 2000 ℃ for 1000 hours
. At the same time, the usage should be simple, can withstand the impact of daily use, and the price should be low, and the on and off of one lamp should not affect the on and off of any other lamp,
keep the relative independence of each lamp. This was a very bold idea at that time, which required great efforts to explore and experiment. Some scientists laugh at him for being a fool and satirize him for "dreaming and boasting". Some other scholars prove that his research is impossible with mathematics
Edison only went to primary school for three months in his life. His knowledge came from his mother's teaching and self-study. His success should be attributed to his mother's understanding and patient teaching since childhood, which made Edison, who was originally regarded as an incompetent child, become a world-famous "king of invention" when he grew up
Edison was curious about many things since he was a child, and he liked to experiment with them himself until he understood the truth. When he grew up, he devoted himself to research and invention according to his own interests. He set up a laboratory in New Jersey and invented more than 2000 kinds of things in his life, such as electric lamp, telegraph, phonograph, video camera, magnetic separator, crusher and so on. Edison's strong research spirit made him make great contribution to the improvement of human life style
"waste, the biggest waste is to waste time." Edison often said to his assistant“ Life is too short. Think more and do more with less time. "
one day, Edison was working in the laboratory. He handed his assistant an empty glass bulb without a light port and said, "you measure the capacity of the bulb." He bowed his head to work again
after a long time, he asked, "what's the capacity?" He didn't hear the answer. He turned his head and saw his assistant measuring the perimeter and inclination of the bulb with a tape measure. He took the measured number and put it on the table to calculate. He said, "time, time, how do you spend so much time?" Edison came over, picked up the empty light bulb, filled it with water, handed it to his assistant, and said, "pour the water in the measuring glass, and tell me its capacity right away."
the assistant immediately read out the number
Edison said, "what an easy way to measure. It's accurate and time-saving. Why can't you think of it? Is it not a waste of time? "
the assistant blushed
Edison murmured: "life is too short, too short. Save time and do more things!"< Before he became famous, Edison was a poor worker. Once, his old friend met him in the street and said with concern, "look, this overcoat on you is not in good condition. You should replace it with a new one."
"do you need it? No one knows me in New York Edison answered with indifference
a few years later, Eddie has become a great inventor< One day, Edison met his friend on the street of New York“ "Oh," exclaimed the friend, "Why are you still wearing this old coat? This time, you need a new one anyway
"do you need it? Everyone here already knows me. " Edison still answered with indifference<
the story of Edison
one snowy night, Edison's mother suddenly fell ill, and his father rushed to the doctor. The doctor said, "your mother has acute appendicitis and needs an operation.". At that time, there was only oil lamp, but no electric lamp. The light of the oil lamp was very dark, and it would be wrong if you were not careful. Edison suddenly thought of a good way, he took out all the oil lamps at home, and then put a mirror behind the oil lamp to let the doctor finish the operation smoothly. The doctor said, "son, you saved your mother with your wisdom and cleverness." Edison took his mother's hand and said, "Mom, I want to make a night's sun."< One morning in the autumn of 1877, Edison came to a magazine editorial office in New York from a place called Merlot in the United States. He carefully held a little thing with a strange shape. The little thing has a long metal bar on it, a big wheel on one end and a small handle on the other. Edison swung his hand, then
wrapped a small piece of tin foil in the cylinder, put on a small needle, and sang a baby hypnotic song to the cylinder. After the action, the machine starts to rotate again, and it sings the hypnotic song again word for word. It's not enough to describe the first feeling of those present at that time. People were overjoyed. All the people in the editorial department told each other that Edison had brought a talking monster. In a short period of time, journalists from all the newspapers in the city rushed to see the most novel machine in the world. Once this invention came out, it aroused the rapid and huge fanaticism of the society at that time for several months. Railway special train to visit
view. Many people began to disbelieve this invention, suspecting that he was hiding something that could speak in it to deceive people. The bishop of a church recited a series of special terms in the Bible to the radio at the highest speed. When these terms were repeated from the machine word by word, they believed that there was nothing false about them
this is what happened when the world's first phonograph came out. People in praise, said the inventor Edison is a "demon". In fact, the nickname of "demon" is far from the invention of gramophone, but it accompanies his whole life. Because he has too many inventions. Electric light, telephone, movie, telegraph, power generator, battery, typewriter, magnetite separator, pressure gauge and so on are all his inventions. According to incomplete statistics, from 1869, when he invented the first automatic counting machine, to 1910, he obtained a total of 1328 invention patents. During this period, he had one invention every 11 days. Because of this, it is natural for him to be called "demon"
but where does the real magic of this "demon" come from? He himself said, "one percent inspiration, ninety-nine percent perspiration." Tenacious perseverance and amazing
diligence are his real "magic power"< Thomas Edison was born in 1847 in the state of Warsaw. He only went to primary school for three months. The school teacher said that he was "stupid", and his relatives and friends all called him
that. But his mother didn't believe it. She was his teacher and guided him to read some books. Before he was 12 years old, he had read many difficult books, and his father led him to study Newton's principle. Family ecation and influence, so that he developed a spirit of diligence and amazing perseverance
Edison loved science. When he was very young, he stored hundreds of bottles for various experiments in his cellar and built a small laboratory. He spent all the money he saved on his daily life on chemical supplies and instruments. But this money alone can not meet the needs of the experiment, so he went to the train as a newsboy. He gets on the bus in the morning and goes home after nine o'clock in the evening. After the experiment, he often takes a rest late at night. Later, he found that there was a smoking room in the luggage compartment of the train that was not used, so he moved the test objects in the cellar of his home to this room and insisted on doing chemical experiments. Here, he also learned to use a printer set up here, and was able to record the local news with a telegraph number, and ran a newspaper. The newspaper was so popular that it sold well that he was only twelve years old. One day, the train shakes, the luggage slides down, and one of his phosphorus poles falls to the ground
and the carriage catches fire immediately. The fire was put out by the people who rushed to the scene, but the conctor deafened him and disabled him for life. The conctor also kicked everything in his "four wheel lab" and "travel printing room" under the car< The difficulties and setbacks did not affect Edison's determination to carry out scientific experiments, so he built a laboratory at home. It is common in experiments that clothes are beaten and burned by electricity. Once, his face was burnt out by nitric acid. Even so, he never lost heart. Edison's earliest efforts greatly contributed to his later inventions. However,
like other great inventors, Edison's road was not smooth. He worked as a night telegraph student. Spend a lot of energy in bookstores and libraries. However, e to the loss of
career for several times, I finally had to go to New York to join my friends
Edison came to New York after a lot of hardships. At this time, he didn't even have a penny in his pocket. He was so hungry that he had to ask for some tea, which was his first meal in Newcastle. Here, he found a friend for a long time, but his friend is also unemployed. Edison, who suffered from hunger, was humble and shabby, and could not afford to be seen. Later, he was allowed to stay overnight in a battery room. It happened that a communication machine was set up in the room to release the market price. On the morning of the third day when he arrived, the machine was out of trouble. Because he paid attention to it, he quickly helped others repair the machine and was left behind. Then he found a job. Since then, he has made great efforts to cooperate with others in the reform of the market price communication machine. Soon, he opened a small factory to proce this kind of communication machine, and graally embarked on the road of scientific research<
solid steps
it's not surprising that electric lights are used today. But before 1880, electric light had only its rudiment, which was the most popular arc light at that time. This kind of lamp is connected with two charcoal on the heads of the two poles of the battery. After the battery is electrified, the two poles are touched, and then they are separated, and a flame immediately occurs between the two poles. Because the two carbon poles are horizontal and there is hot air rising in the middle, the flame between the two poles will bend upward slightly, like a bow or arc, so it is called arc lamp. This kind of lamp has many disadvantages: it needs to change the carbon strips constantly; The sound is loud; The lighting effect
is small and easy to damage the eyesight. Dirty air; Another big drawback is that a return current can only light an arc lamp. At that time, some famous scientists, including the inventor of arc lamp, did not always praise this kind of lamp. However, in 1877, Edison began to reform the arc lamp experiment, and proposed to divide the current (that is, one port current points many lamps), and change the arc
light to white light. The experiment should be satisfactory. It is necessary to find a kind of material that can burn to white heat to make filament, and this kind of filament needs to withstand the combustion of heat at 2000 ℃ for 1000 hours
. At the same time, the usage should be simple, can withstand the impact of daily use, and the price should be low, and the on and off of one lamp should not affect the on and off of any other lamp,
keep the relative independence of each lamp. This was a very bold idea at that time, which required great efforts to explore and experiment. Some scientists laugh at him for being a fool and satirize him for "dreaming and boasting". Some other scholars prove that his research is impossible with mathematics
8. Unknown_Error
9. Edison only went to primary school for three months in his life. His knowledge came from his mother's teaching and self-study. His success should be attributed to his mother's understanding and patient teaching since childhood, which made Edison, who was originally regarded as an incompetent child, become a world-famous "king of invention" when he grew up
Edison was curious about many things since he was a child, and he liked to experiment with them himself until he understood the truth. When he grew up, he devoted himself to research and invention according to his own interests. He set up a laboratory in New Jersey and invented more than 2000 kinds of things in his life, such as electric lamp, telegraph, phonograph, video camera, magnetic separator, crusher and so on. Edison's strong research spirit made him make great contribution to the improvement of human life style
"waste, the biggest waste is to waste time." Edison often said to his assistant“ Life is too short. Think more and do more with less time. "
one day, Edison was working in the laboratory. He handed his assistant an empty glass bulb without a light port and said, "you measure the capacity of the bulb." He bowed his head to work again
after a long time, he asked, "what's the capacity?" He didn't hear the answer. He turned his head and saw his assistant measuring the perimeter and inclination of the bulb with a tape measure. He took the measured number and put it on the table to calculate. He said, "time, time, how do you spend so much time?" Edison came over, picked up the empty light bulb, filled it with water, handed it to his assistant, and said, "pour the water in the measuring glass, and tell me its capacity right away."
the assistant immediately read out the number
Edison said, "what an easy way to measure. It's accurate and time-saving. Why can't you think of it? Is it not a waste of time? "
the assistant blushed
Edison murmured: "life is too short, too short. Save time and do more things!"< Before he became famous, Edison was a poor worker. Once, his old friend met him in the street and said with concern, "look, this overcoat on you is not in good condition. You should replace it with a new one."
"do you need it? No one knows me in New York Edison answered with indifference
a few years later, Eddie has become a great inventor< One day, Edison met his friend on the street of New York“ "Oh," exclaimed the friend, "Why are you still wearing this old coat? This time, you need a new one anyway
"do you need it? Everyone here already knows me. " Edison still answered with indifference
one snowy night, Edison's mother suddenly fell ill, and his father rushed to the doctor. The doctor said, "your mother has acute appendicitis and needs an operation.". At that time, there was only oil lamp, but no electric lamp. The light of the oil lamp was very dark, and it would be wrong if you were not careful. Edison suddenly thought of a good way, he took out all the oil lamps at home, and then put a mirror behind the oil lamp to let the doctor finish the operation smoothly. The doctor said, "son, you saved your mother with your wisdom and cleverness." Edison took his mother's hand and said, "Mom, I want to make a night's sun."< One morning in the autumn of 1877, Edison came to the editorial office of a magazine in New York from a place called Merlot. He carefully held a little thing with a strange shape. The little thing has a long metal bar on it, a big wheel on one end and a small handle on the other. Edison swung his hand, then
wrapped a small piece of tin foil in the cylinder, put on a small needle, and sang a baby hypnotic song to the cylinder. After the action, the machine starts to rotate again, and it sings the hypnotic song again word for word. It's not enough to describe the first feeling of those present at that time. People were overjoyed. All the people in the editorial department told each other that Edison had brought a talking monster. In a short period of time, journalists from all the newspapers in the city rushed to see the most novel machine in the world. Once this invention came out, it aroused the rapid and huge fanaticism of the society at that time for several months. Railway special train to visit
view. Many people began to disbelieve this invention, suspecting that he was hiding something that could speak in it to deceive people. The bishop of a church recited a series of special terms in the Bible to the radio at the highest speed. When these terms were repeated from the machine word by word, they believed that there was nothing false about them
this is what happened when the world's first phonograph came out. People in praise, said the inventor Edison is a "demon". In fact, the nickname of "demon" is far from the invention of gramophone, but it accompanies his whole life. Because he has too many inventions. Electric light, telephone, movie, telegraph, power generator, battery, typewriter, magnetite separator, pressure gauge and so on are all his inventions. According to incomplete statistics, from 1869, when he invented the first automatic counting machine, to 1910, he obtained a total of 1328 invention patents. During this period, he had one invention every 11 days. Because of this, it is natural for him to be called "demon"
but where does the real magic of this "demon" come from? He himself said, "one percent inspiration, ninety-nine percent perspiration." Tenacious perseverance and amazing
diligence are his real "magic power"< Thomas Edison was born in 1847 in the state of Warsaw. He only went to primary school for three months. The school teacher said that he was "stupid", and his relatives and friends all called him
that. But his mother didn't believe it. She was his teacher and guided him to read some books. Before he was 12 years old, he had read many difficult books, and his father led him to study Newton's principle. Family ecation and influence, so that he developed a spirit of diligence and amazing perseverance
Edison loved science. When he was very young, he stored hundreds of bottles for various experiments in his cellar and built a small laboratory. He spent all the money he saved on his daily life on chemical supplies and instruments. But this money alone can not meet the needs of the experiment, so he went to the train as a newsboy. He gets on the bus in the morning and goes home after nine o'clock in the evening. After the experiment, he often takes a rest late at night. Later, he found that there was a smoking room in the luggage compartment of the train that was not used, so he moved the test objects in the cellar of his home to this room and insisted on doing chemical experiments. Here, he also learned to use a printer set up here, and was able to record the local news with a telegraph number, and ran a newspaper. The newspaper was so popular that it sold well that he was only twelve years old. One day, the train shakes, the luggage slides down, and one of his phosphorus poles falls to the ground
and the carriage catches fire immediately. The fire was put out by the people who rushed to the scene, but the conctor deafened him and disabled him for life. The conctor also kicked everything in his "four wheel lab" and "travel printing room" under the car< The difficulties and setbacks did not affect Edison's determination to carry out scientific experiments, so he built a laboratory at home. It is common in experiments that clothes are beaten and burned by electricity. Once, his face was burnt out by nitric acid. Even so, he never lost heart. Edison's earliest efforts greatly contributed to his later inventions. However,
like other great inventors, Edison's road was not smooth. He worked as a night telegraph student. Spend a lot of energy in bookstores and libraries. However, e to the loss of
career for several times, I finally had to go to New York to join my friends
Edison came to New York after a lot of hardships. At this time, he didn't even have a penny in his pocket. He was so hungry that he had to ask for some tea, which was his first meal in Newcastle. Here, he found a friend for a long time, but his friend is also unemployed. Edison, who suffered from hunger, was humble and shabby, and could not afford to be seen. Later, he was allowed to stay overnight in a battery room. It happened that a communication machine was set up in the room to release the market price. On the morning of the third day when he arrived, the machine was out of trouble. Because he paid attention to it, he quickly helped others repair the machine and was left behind. Then he found a job. Since then, he has made great efforts to cooperate with others in the reform of the market price communication machine. Soon, he opened a small factory to proce this kind of communication machine, and graally embarked on the road of scientific research<
solid steps
it's not surprising that electric lights are used today. But before 1880, electric light had only its rudiment, which was the most popular arc light at that time. This kind of lamp is connected with two charcoal on the heads of the two poles of the battery. After the battery is electrified, the two poles are touched, and then they are separated, and a flame immediately occurs between the two poles. Because the two carbon poles are horizontal and there is hot air rising in the middle, the flame between the two poles will bend upward slightly, like a bow or arc, so it is called arc lamp. This kind of lamp has many disadvantages: it needs to change the carbon strips constantly; The sound is loud; The lighting effect
is small and easy to damage the eyesight. Dirty air; Another big drawback is that a return current can only light an arc lamp. At that time, some famous scientists, including the inventor of arc lamp, did not always praise this kind of lamp. However, in 1877, Edison began to reform the arc lamp experiment, and proposed to divide the current (that is, one port current points many lamps), and change the arc
light to white light. The experiment should be satisfactory. It is necessary to find a kind of material that can burn to white heat to make filament, and this kind of filament needs to withstand the combustion of heat at 2000 ℃ for 1000 hours
. At the same time, the usage should be simple, can withstand the impact of daily use, and the price should be low, and the on and off of one lamp should not affect the on and off of any other lamp,
keep the relative independence of each lamp. This was a very bold idea at that time, which required great efforts to explore and experiment. Some scientists laugh at him for being a fool and satirize him for "dreaming and boasting". Some other scholars prove that his research is impossible with mathematics. But Edison was always confident to experiment
Edison was curious about many things since he was a child, and he liked to experiment with them himself until he understood the truth. When he grew up, he devoted himself to research and invention according to his own interests. He set up a laboratory in New Jersey and invented more than 2000 kinds of things in his life, such as electric lamp, telegraph, phonograph, video camera, magnetic separator, crusher and so on. Edison's strong research spirit made him make great contribution to the improvement of human life style
"waste, the biggest waste is to waste time." Edison often said to his assistant“ Life is too short. Think more and do more with less time. "
one day, Edison was working in the laboratory. He handed his assistant an empty glass bulb without a light port and said, "you measure the capacity of the bulb." He bowed his head to work again
after a long time, he asked, "what's the capacity?" He didn't hear the answer. He turned his head and saw his assistant measuring the perimeter and inclination of the bulb with a tape measure. He took the measured number and put it on the table to calculate. He said, "time, time, how do you spend so much time?" Edison came over, picked up the empty light bulb, filled it with water, handed it to his assistant, and said, "pour the water in the measuring glass, and tell me its capacity right away."
the assistant immediately read out the number
Edison said, "what an easy way to measure. It's accurate and time-saving. Why can't you think of it? Is it not a waste of time? "
the assistant blushed
Edison murmured: "life is too short, too short. Save time and do more things!"< Before he became famous, Edison was a poor worker. Once, his old friend met him in the street and said with concern, "look, this overcoat on you is not in good condition. You should replace it with a new one."
"do you need it? No one knows me in New York Edison answered with indifference
a few years later, Eddie has become a great inventor< One day, Edison met his friend on the street of New York“ "Oh," exclaimed the friend, "Why are you still wearing this old coat? This time, you need a new one anyway
"do you need it? Everyone here already knows me. " Edison still answered with indifference
one snowy night, Edison's mother suddenly fell ill, and his father rushed to the doctor. The doctor said, "your mother has acute appendicitis and needs an operation.". At that time, there was only oil lamp, but no electric lamp. The light of the oil lamp was very dark, and it would be wrong if you were not careful. Edison suddenly thought of a good way, he took out all the oil lamps at home, and then put a mirror behind the oil lamp to let the doctor finish the operation smoothly. The doctor said, "son, you saved your mother with your wisdom and cleverness." Edison took his mother's hand and said, "Mom, I want to make a night's sun."< One morning in the autumn of 1877, Edison came to the editorial office of a magazine in New York from a place called Merlot. He carefully held a little thing with a strange shape. The little thing has a long metal bar on it, a big wheel on one end and a small handle on the other. Edison swung his hand, then
wrapped a small piece of tin foil in the cylinder, put on a small needle, and sang a baby hypnotic song to the cylinder. After the action, the machine starts to rotate again, and it sings the hypnotic song again word for word. It's not enough to describe the first feeling of those present at that time. People were overjoyed. All the people in the editorial department told each other that Edison had brought a talking monster. In a short period of time, journalists from all the newspapers in the city rushed to see the most novel machine in the world. Once this invention came out, it aroused the rapid and huge fanaticism of the society at that time for several months. Railway special train to visit
view. Many people began to disbelieve this invention, suspecting that he was hiding something that could speak in it to deceive people. The bishop of a church recited a series of special terms in the Bible to the radio at the highest speed. When these terms were repeated from the machine word by word, they believed that there was nothing false about them
this is what happened when the world's first phonograph came out. People in praise, said the inventor Edison is a "demon". In fact, the nickname of "demon" is far from the invention of gramophone, but it accompanies his whole life. Because he has too many inventions. Electric light, telephone, movie, telegraph, power generator, battery, typewriter, magnetite separator, pressure gauge and so on are all his inventions. According to incomplete statistics, from 1869, when he invented the first automatic counting machine, to 1910, he obtained a total of 1328 invention patents. During this period, he had one invention every 11 days. Because of this, it is natural for him to be called "demon"
but where does the real magic of this "demon" come from? He himself said, "one percent inspiration, ninety-nine percent perspiration." Tenacious perseverance and amazing
diligence are his real "magic power"< Thomas Edison was born in 1847 in the state of Warsaw. He only went to primary school for three months. The school teacher said that he was "stupid", and his relatives and friends all called him
that. But his mother didn't believe it. She was his teacher and guided him to read some books. Before he was 12 years old, he had read many difficult books, and his father led him to study Newton's principle. Family ecation and influence, so that he developed a spirit of diligence and amazing perseverance
Edison loved science. When he was very young, he stored hundreds of bottles for various experiments in his cellar and built a small laboratory. He spent all the money he saved on his daily life on chemical supplies and instruments. But this money alone can not meet the needs of the experiment, so he went to the train as a newsboy. He gets on the bus in the morning and goes home after nine o'clock in the evening. After the experiment, he often takes a rest late at night. Later, he found that there was a smoking room in the luggage compartment of the train that was not used, so he moved the test objects in the cellar of his home to this room and insisted on doing chemical experiments. Here, he also learned to use a printer set up here, and was able to record the local news with a telegraph number, and ran a newspaper. The newspaper was so popular that it sold well that he was only twelve years old. One day, the train shakes, the luggage slides down, and one of his phosphorus poles falls to the ground
and the carriage catches fire immediately. The fire was put out by the people who rushed to the scene, but the conctor deafened him and disabled him for life. The conctor also kicked everything in his "four wheel lab" and "travel printing room" under the car< The difficulties and setbacks did not affect Edison's determination to carry out scientific experiments, so he built a laboratory at home. It is common in experiments that clothes are beaten and burned by electricity. Once, his face was burnt out by nitric acid. Even so, he never lost heart. Edison's earliest efforts greatly contributed to his later inventions. However,
like other great inventors, Edison's road was not smooth. He worked as a night telegraph student. Spend a lot of energy in bookstores and libraries. However, e to the loss of
career for several times, I finally had to go to New York to join my friends
Edison came to New York after a lot of hardships. At this time, he didn't even have a penny in his pocket. He was so hungry that he had to ask for some tea, which was his first meal in Newcastle. Here, he found a friend for a long time, but his friend is also unemployed. Edison, who suffered from hunger, was humble and shabby, and could not afford to be seen. Later, he was allowed to stay overnight in a battery room. It happened that a communication machine was set up in the room to release the market price. On the morning of the third day when he arrived, the machine was out of trouble. Because he paid attention to it, he quickly helped others repair the machine and was left behind. Then he found a job. Since then, he has made great efforts to cooperate with others in the reform of the market price communication machine. Soon, he opened a small factory to proce this kind of communication machine, and graally embarked on the road of scientific research<
solid steps
it's not surprising that electric lights are used today. But before 1880, electric light had only its rudiment, which was the most popular arc light at that time. This kind of lamp is connected with two charcoal on the heads of the two poles of the battery. After the battery is electrified, the two poles are touched, and then they are separated, and a flame immediately occurs between the two poles. Because the two carbon poles are horizontal and there is hot air rising in the middle, the flame between the two poles will bend upward slightly, like a bow or arc, so it is called arc lamp. This kind of lamp has many disadvantages: it needs to change the carbon strips constantly; The sound is loud; The lighting effect
is small and easy to damage the eyesight. Dirty air; Another big drawback is that a return current can only light an arc lamp. At that time, some famous scientists, including the inventor of arc lamp, did not always praise this kind of lamp. However, in 1877, Edison began to reform the arc lamp experiment, and proposed to divide the current (that is, one port current points many lamps), and change the arc
light to white light. The experiment should be satisfactory. It is necessary to find a kind of material that can burn to white heat to make filament, and this kind of filament needs to withstand the combustion of heat at 2000 ℃ for 1000 hours
. At the same time, the usage should be simple, can withstand the impact of daily use, and the price should be low, and the on and off of one lamp should not affect the on and off of any other lamp,
keep the relative independence of each lamp. This was a very bold idea at that time, which required great efforts to explore and experiment. Some scientists laugh at him for being a fool and satirize him for "dreaming and boasting". Some other scholars prove that his research is impossible with mathematics. But Edison was always confident to experiment
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