How can Songgang get to Futian District Civic Center
Publish: 2021-05-09 02:20:45
1. Working principle of cone crusher: when working, the rotation of the motor is driven by the belt pulley or linkage shaft, the transmission shaft of cone crusher and the cone part of cone crusher under the force of eccentric sleeve to rotate around the fixed point. Thus, the crushing wall of the crushing cone sometimes approaches and sometimes leaves the surface of the mortar wall fixed on the adjusting sleeve, so that the ore is constantly impacted, squeezed and bent in the crushing cavity to realize the crushing of the ore
see http://www.yuanzhuiposuiji.cn/yzcp/shiliaoshengchanxian/127.html
see http://www.yuanzhuiposuiji.cn/yzcp/shiliaoshengchanxian/127.html
2.
bus line: Metro Line 7 → Metro Line 2 → No. 664, the whole journey is about 37.3km
1. Walk about 1.4km from Yuangang station to Yuangang station
2. Take Metro Line 7, pass 5 stops, reach Shibi station
3, walk about 150m, transfer to Metro Line 2
4. Take Metro Line 2, pass 17 stops, reach Baiyun Park Station
5, walk about 210m, Arrive at Baiyun Park Station of subway
6, take bus 664, pass 2 stops, arrive at Baiyun International Conference Center Station
7, walk about 180 meters, arrive at Baiyun International Conference Center of Guangzhou...
6
3. You just convert like this. After that, you can edit it with your own image processing software, or you can design one yourself
4. Use the delete tool to erase the white part, or pick out the original image in PS, save it as a GIF with transparent background, and then import it.
5. There is no record of the evolution of the vertical form in ancient books
ancient mathematics in China was mainly based on calculation, and made great achievements. Among them, the decimal value system, calculation and abacus have played an important role in the development of mathematics, and their advantages are also commendable in the history of mathematics in the world
decimal notation was once called "one of the most wonderful inventions" by Marx (1818-1883)
since there are written records, the decimal system has been followed in China. Oracle bone inscriptions in the Yin Dynasty and Zhong Ding's inscriptions in the Western Zhou Dynasty all use a combination of one, two, three, four, five, six, seven, eight, nine, ten, one hundred, one thousand and ten thousand words to record natural numbers within one hundred thousand. For example, 2656 was written in oracle bone inscriptions and 659 in Zhong Dingwen. In fact, as long as the words "thousand", "hundred", "ten" and "you" are cancelled, it will be basically the same as the digit system
the spring and autumn and Warring States period is the period of China's transition from slavery to feudalism. The rapid development of proction and the progress of science and technology put forward a large number of more complex numerical calculation problems. In order to meet this need, the working people have created a very important calculation method -- calculation. We believe that the calculation was completed in the spring and Autumn period and the Warring States period. The reasons are as follows: first, ring the spring and Autumn period and the Warring States period, agriculture, commerce, astronomy and calendar made great progress. In these fields, a large number of calculation problems appeared, which were much more complicated than before. Due to the abolition of the minefield system, private fields of various shapes appeared one after another, and the tax system was implemented accordingly, which required the calculation of land area and yield of complex shapes; With the increase of commercial trade and the wide use of currency, a large number of proportional conversion problems have been raised; In order to meet the needs of agriculture at that time, the multiplication and division of multiple numbers should be calculated. In order to solve these complex calculation problems, we created calculation tools and calculation methods. Second, the existing literature and cultural relics also prove that the plan appeared in the spring and Autumn period and the Warring States period. For example, the two words "Suan" and "Chou" appeared in the works of the spring and Autumn period and the Warring States period (such as Yili, Sunzi, Laozi, Fajing, Guanzi, Xunzi, etc.), which are still not seen in oracle bone inscriptions and Zhongding writings. Figures other than 123 first appeared in the currency (Dao, BU) of the Warring States period Lao Tzu said: "those who are good at planning don't need to plan". It can be seen that planning has become more common at this time. Therefore, we say that planning was completed in the spring and Autumn period and the Warring States period. This does not deny that before the spring and Autumn period and the Warring States period, there were simple counting and four simple operations
the shape and size of Suan Chou can be found in the book of Han Dynasty. According to the records, Suan Chou is a round bamboo stick with a diameter of one minute (0.23 cm) and a length of six inches (13.86 cm), with 271 sticks as a "grip". In the northern and Southern Dynasties, in the sixth century A.D., the length of the calculations recorded in Shu Shu Ji Yi and Sui Shu Lu Li Zhi was shortened, and the round ones were changed into square or flat ones. This change is easy to understand: the purpose of shortening the length is to rece the area occupied by the layout, so as to adapt to more complex calculations; The change from round to square or flat is to avoid the error caused by the easy rolling of round calculation. According to the records in the literature, besides bamboo chips, there are wood chips, iron chips, jade chips and tooth chips, as well as the calculation bag and operator tube containing the calculation chips. In the Tang Dynasty, it was stipulated that civil and military officials must carry arithmetic bags. In mid August 1971, in Qianyang County, Baoji City, Shaanxi Province, more than 30 pieces of bone were found for the first time in the Xuandi period of the Western Han Dynasty (73 BC to 49 BC). The size and length of these pieces are basically the same as those recorded in the book of Han · luli. In the first half of 1975, a bunch of bamboo cacao from the period of Emperor Wen of the Western Han Dynasty (179 BC to 157 BC) was found in tomb 168 of Fenghuang Mountain in Jiangling, Hubei Province, which is slightly larger than that found in Qianyang County. In September 1980, about 30 bones were found in Shijiazhuang City in the early Eastern Han Dynasty (the first century A.D.), the length and shape of which are similar to those recorded in the book of Sui · luli. This shows that the change of the length and shape of the bones began as early as the early Eastern Han Dynasty. The excavation of Suan Chou provides valuable material for the study of the history of mathematics in China
so as to add, subtract, multiply, divide, square root and other algebraic calculations
as soon as the plan appeared, it strictly followed the decimal notation. The number above nine goes to one place. If you put the same number in 100 places, it will be several hundred, and if you put it in 10000 places, it will be tens of thousands. This counting method is essentially the same as the present counting method, except that the number used is different from the current Indo Arabic numeral form. Planning is to put one side of the calculation into a number, while calculating, its operation procere is basically similar to the current abacus operation procere. The books that record the methods of calculation and arithmetic are Sunzi Suanjing (4th century), xiahouyang Suanjing (5th century) and Shushu Jiyi (6th century). After the appearance of negative numbers, arithmetic chips are divided into red and black. Red chips represent positive numbers and black chips represent negative numbers. It can also express various algebraic expressions and carry out various algebraic operations. The method is similar to the present separation coefficient method. The brilliant achievements in numerical calculation and algebra in ancient China are closely related to calculation. For example, if Zu Chong's PI is accurate to the sixth decimal place, he needs to calculate the side length of the regular 12288 polygon and square a nine digit number 22 times (except for the steps of addition, subtraction, multiplication and division). If there is no decimal value system, it will be much more difficult
although the counting method of Cuban Byron has the meaning of bit value system, it is sixty, and the calculation is complicated. In ancient Egypt, there were only two number symbols from one to ten, and four number symbols from one hundred to ten million, which were pictographic. For example, a bird was used to represent 100000. Ancient Greece, with a relatively developed culture, was very backward in its counting method because it valued geometry and despised calculation. All Greek letters were used to represent one to one created by the people. However, the counting method used in India before the third century was Greek and Roman, neither of which was digit system. The real use of decimal system appeared at the end of the sixth century. It can be seen from this that the decimal notation and calculation in ancient China should occupy an important position in the history of mathematics in the world< It took about two thousand years for planning in ancient China and played an important role in proction, science and technology, and even in people's life. But its disadvantages are also very obvious: first of all, it is very inconvenient to carry out calculation with a large number of chips outdoors; Secondly, the larger the number of digits, the larger the area needed; In addition, when the calculation speed is accelerated, it is easy to cause errors e to improper calculation. With the development of society, the requirement of computing technology is higher and higher, so it is necessary to reform it. This reform started from the commercial practical arithmetic after the middle Tang Dynasty, a large number of calculation formulas appeared in the song and Yuan Dynasties, and it lasted more than 700 years to the universal application of abacus in the late Yuan and early Ming Dynasties A large number of works appeared in this period are recorded in the new history of Tang Dynasty and the history of Song Dynasty. Because the feudal ruling class despised folk mathematics, most of these works have been lost. From the works left behind, we can see that the reform of calculation began with the simplification of calculation rather than the reform of tools, which eventually led to the emergence of abacus< It is very clear that abacus is evolved from calculation. In the calculation figures, the upper one is five, the lower one is one, the upper one is five, and the next one is one; Due to the fact that a number is equal to or more than ten in multiplication and division (e.g. 26532) ÷ 8,
in the form of upper two beads and lower five beads. Secondly, we can prove that from Yang Hui and Zhu Shijie to Ding Ju, he Pingzi and Jia Heng at the end of the Yuan Dynasty, except for the "Qi Yi" method, all the current abacus rhymes were designed for calculation. Yang Hui's Cheng Chu Tong Bian Ben mo (1274 A.D.) and Zhu Shijie's computational Enlightenment (1299 A.D.) have quite complete rhymes. However, Yang Hui said in Cheng Chu Tong Bian Ben Mo that "horizontal" and "straight" can't be calculated, among which "horizontal" and "straight" obviously refer to the vertical and horizontal arrangement of computational chips; This is also the meaning of Zhu Shijie's reference to "knowing the truth of numbers in arithmetic enlightenment" Ding Ju algorithm (A.D. 1355), he Pingzi's "detailed algorithm" (A.D. 1373), Jia Heng's "algorithm omnipotent" (about A.D. 1373) also have quite complete elimination formula, but they do not mention abacus, and "detailed algorithm" has a lot of calculations. After the emergence of the formula, the shortcomings of the original calculation are more prominent, and there is a contradiction between the quickness of the formula and the slowness of manipulating the formula. In order to be handy, the working people will create a more advanced computing tool - abacus
the abacus was first mentioned in the existing literature in the early Ming Dynasty. In the middle of the Ming Dynasty and the middle of the 15th century, there was a specification for making abacus: "abacus type: one foot two inches long, four inches two minutes big. The frame is six minutes thick, nine minutes big,... Two on the line, one inch and one minute; Five of them are offline, three inches and one minute. It depends on the length and size. " What separates the upper two and the lower five is not a wooden beam, but a line. The existing works that explain the usage of abacus in detail include Xu Xinlu's Pan Zhu algorithm (1573 A.D.), Ke Shangqian's mathematics general path (1578 A.D.), Zhu Zaiyu's new theory of Mathematics (1536-1611 A.D.) and Cheng Dawei's Zhi Suan Tongzong (1592 A.D.), among which Cheng Dawei's works are the most popular< It is worth noting that abacus was mentioned in literary and dramatic works in the middle and late Yuan Dynasty. For example, in 1279 A.D., Liu Yin wrote a five character poem about abacus in his collected works of Mr. Jingxiu; In Tao Zongyi's record of stopping farming, he demoted his maidservant as an abacus bead, which can only be moved by dialing "Pang Jushi mistakenly released the debt of the next life" in Yuanqu anthology mentioned that "going to that abacus set my age", and so on. In literature and drama, abacus beads are used as metaphors. It is said that abacus beads have become more popular, and that abacus beads are relatively new. Therefore, it can be considered that abacus appeared in the middle of Yuan Dynasty, and was widely used in the late Yuan Dynasty and early Ming Dynasty< Some foreign scholars believe that the abacus appeared in the Han Dynasty, based on the fact that it was explicitly mentioned in the book of numerology written by Xu Yue of the Han Dynasty and annotated by Zhen Luan of the Northern Zhou Dynasty. Qian baocong (1892-1974), a mathematician and historian of mathematics in China, once proved that the book is a Book annotated by Zhen Luan relying on forgery. In the Northern Zhou Dynasty, multiplication and division were carried out at the upper, middle and lower levels, and there was no simplified formula for multiplication and division. Therefore, the abacus annotated by Zhen Luan was at best a counting tool or a simple abacus that could only be used for addition and subtraction, which was completely different from the later abacus
abacus was also spread to North Korea, Japan and other countries, which was of great significance to the development of these countries
ancient mathematics in China was mainly based on calculation, and made great achievements. Among them, the decimal value system, calculation and abacus have played an important role in the development of mathematics, and their advantages are also commendable in the history of mathematics in the world
decimal notation was once called "one of the most wonderful inventions" by Marx (1818-1883)
since there are written records, the decimal system has been followed in China. Oracle bone inscriptions in the Yin Dynasty and Zhong Ding's inscriptions in the Western Zhou Dynasty all use a combination of one, two, three, four, five, six, seven, eight, nine, ten, one hundred, one thousand and ten thousand words to record natural numbers within one hundred thousand. For example, 2656 was written in oracle bone inscriptions and 659 in Zhong Dingwen. In fact, as long as the words "thousand", "hundred", "ten" and "you" are cancelled, it will be basically the same as the digit system
the spring and autumn and Warring States period is the period of China's transition from slavery to feudalism. The rapid development of proction and the progress of science and technology put forward a large number of more complex numerical calculation problems. In order to meet this need, the working people have created a very important calculation method -- calculation. We believe that the calculation was completed in the spring and Autumn period and the Warring States period. The reasons are as follows: first, ring the spring and Autumn period and the Warring States period, agriculture, commerce, astronomy and calendar made great progress. In these fields, a large number of calculation problems appeared, which were much more complicated than before. Due to the abolition of the minefield system, private fields of various shapes appeared one after another, and the tax system was implemented accordingly, which required the calculation of land area and yield of complex shapes; With the increase of commercial trade and the wide use of currency, a large number of proportional conversion problems have been raised; In order to meet the needs of agriculture at that time, the multiplication and division of multiple numbers should be calculated. In order to solve these complex calculation problems, we created calculation tools and calculation methods. Second, the existing literature and cultural relics also prove that the plan appeared in the spring and Autumn period and the Warring States period. For example, the two words "Suan" and "Chou" appeared in the works of the spring and Autumn period and the Warring States period (such as Yili, Sunzi, Laozi, Fajing, Guanzi, Xunzi, etc.), which are still not seen in oracle bone inscriptions and Zhongding writings. Figures other than 123 first appeared in the currency (Dao, BU) of the Warring States period Lao Tzu said: "those who are good at planning don't need to plan". It can be seen that planning has become more common at this time. Therefore, we say that planning was completed in the spring and Autumn period and the Warring States period. This does not deny that before the spring and Autumn period and the Warring States period, there were simple counting and four simple operations
the shape and size of Suan Chou can be found in the book of Han Dynasty. According to the records, Suan Chou is a round bamboo stick with a diameter of one minute (0.23 cm) and a length of six inches (13.86 cm), with 271 sticks as a "grip". In the northern and Southern Dynasties, in the sixth century A.D., the length of the calculations recorded in Shu Shu Ji Yi and Sui Shu Lu Li Zhi was shortened, and the round ones were changed into square or flat ones. This change is easy to understand: the purpose of shortening the length is to rece the area occupied by the layout, so as to adapt to more complex calculations; The change from round to square or flat is to avoid the error caused by the easy rolling of round calculation. According to the records in the literature, besides bamboo chips, there are wood chips, iron chips, jade chips and tooth chips, as well as the calculation bag and operator tube containing the calculation chips. In the Tang Dynasty, it was stipulated that civil and military officials must carry arithmetic bags. In mid August 1971, in Qianyang County, Baoji City, Shaanxi Province, more than 30 pieces of bone were found for the first time in the Xuandi period of the Western Han Dynasty (73 BC to 49 BC). The size and length of these pieces are basically the same as those recorded in the book of Han · luli. In the first half of 1975, a bunch of bamboo cacao from the period of Emperor Wen of the Western Han Dynasty (179 BC to 157 BC) was found in tomb 168 of Fenghuang Mountain in Jiangling, Hubei Province, which is slightly larger than that found in Qianyang County. In September 1980, about 30 bones were found in Shijiazhuang City in the early Eastern Han Dynasty (the first century A.D.), the length and shape of which are similar to those recorded in the book of Sui · luli. This shows that the change of the length and shape of the bones began as early as the early Eastern Han Dynasty. The excavation of Suan Chou provides valuable material for the study of the history of mathematics in China
so as to add, subtract, multiply, divide, square root and other algebraic calculations
as soon as the plan appeared, it strictly followed the decimal notation. The number above nine goes to one place. If you put the same number in 100 places, it will be several hundred, and if you put it in 10000 places, it will be tens of thousands. This counting method is essentially the same as the present counting method, except that the number used is different from the current Indo Arabic numeral form. Planning is to put one side of the calculation into a number, while calculating, its operation procere is basically similar to the current abacus operation procere. The books that record the methods of calculation and arithmetic are Sunzi Suanjing (4th century), xiahouyang Suanjing (5th century) and Shushu Jiyi (6th century). After the appearance of negative numbers, arithmetic chips are divided into red and black. Red chips represent positive numbers and black chips represent negative numbers. It can also express various algebraic expressions and carry out various algebraic operations. The method is similar to the present separation coefficient method. The brilliant achievements in numerical calculation and algebra in ancient China are closely related to calculation. For example, if Zu Chong's PI is accurate to the sixth decimal place, he needs to calculate the side length of the regular 12288 polygon and square a nine digit number 22 times (except for the steps of addition, subtraction, multiplication and division). If there is no decimal value system, it will be much more difficult
although the counting method of Cuban Byron has the meaning of bit value system, it is sixty, and the calculation is complicated. In ancient Egypt, there were only two number symbols from one to ten, and four number symbols from one hundred to ten million, which were pictographic. For example, a bird was used to represent 100000. Ancient Greece, with a relatively developed culture, was very backward in its counting method because it valued geometry and despised calculation. All Greek letters were used to represent one to one created by the people. However, the counting method used in India before the third century was Greek and Roman, neither of which was digit system. The real use of decimal system appeared at the end of the sixth century. It can be seen from this that the decimal notation and calculation in ancient China should occupy an important position in the history of mathematics in the world< It took about two thousand years for planning in ancient China and played an important role in proction, science and technology, and even in people's life. But its disadvantages are also very obvious: first of all, it is very inconvenient to carry out calculation with a large number of chips outdoors; Secondly, the larger the number of digits, the larger the area needed; In addition, when the calculation speed is accelerated, it is easy to cause errors e to improper calculation. With the development of society, the requirement of computing technology is higher and higher, so it is necessary to reform it. This reform started from the commercial practical arithmetic after the middle Tang Dynasty, a large number of calculation formulas appeared in the song and Yuan Dynasties, and it lasted more than 700 years to the universal application of abacus in the late Yuan and early Ming Dynasties A large number of works appeared in this period are recorded in the new history of Tang Dynasty and the history of Song Dynasty. Because the feudal ruling class despised folk mathematics, most of these works have been lost. From the works left behind, we can see that the reform of calculation began with the simplification of calculation rather than the reform of tools, which eventually led to the emergence of abacus< It is very clear that abacus is evolved from calculation. In the calculation figures, the upper one is five, the lower one is one, the upper one is five, and the next one is one; Due to the fact that a number is equal to or more than ten in multiplication and division (e.g. 26532) ÷ 8,
in the form of upper two beads and lower five beads. Secondly, we can prove that from Yang Hui and Zhu Shijie to Ding Ju, he Pingzi and Jia Heng at the end of the Yuan Dynasty, except for the "Qi Yi" method, all the current abacus rhymes were designed for calculation. Yang Hui's Cheng Chu Tong Bian Ben mo (1274 A.D.) and Zhu Shijie's computational Enlightenment (1299 A.D.) have quite complete rhymes. However, Yang Hui said in Cheng Chu Tong Bian Ben Mo that "horizontal" and "straight" can't be calculated, among which "horizontal" and "straight" obviously refer to the vertical and horizontal arrangement of computational chips; This is also the meaning of Zhu Shijie's reference to "knowing the truth of numbers in arithmetic enlightenment" Ding Ju algorithm (A.D. 1355), he Pingzi's "detailed algorithm" (A.D. 1373), Jia Heng's "algorithm omnipotent" (about A.D. 1373) also have quite complete elimination formula, but they do not mention abacus, and "detailed algorithm" has a lot of calculations. After the emergence of the formula, the shortcomings of the original calculation are more prominent, and there is a contradiction between the quickness of the formula and the slowness of manipulating the formula. In order to be handy, the working people will create a more advanced computing tool - abacus
the abacus was first mentioned in the existing literature in the early Ming Dynasty. In the middle of the Ming Dynasty and the middle of the 15th century, there was a specification for making abacus: "abacus type: one foot two inches long, four inches two minutes big. The frame is six minutes thick, nine minutes big,... Two on the line, one inch and one minute; Five of them are offline, three inches and one minute. It depends on the length and size. " What separates the upper two and the lower five is not a wooden beam, but a line. The existing works that explain the usage of abacus in detail include Xu Xinlu's Pan Zhu algorithm (1573 A.D.), Ke Shangqian's mathematics general path (1578 A.D.), Zhu Zaiyu's new theory of Mathematics (1536-1611 A.D.) and Cheng Dawei's Zhi Suan Tongzong (1592 A.D.), among which Cheng Dawei's works are the most popular< It is worth noting that abacus was mentioned in literary and dramatic works in the middle and late Yuan Dynasty. For example, in 1279 A.D., Liu Yin wrote a five character poem about abacus in his collected works of Mr. Jingxiu; In Tao Zongyi's record of stopping farming, he demoted his maidservant as an abacus bead, which can only be moved by dialing "Pang Jushi mistakenly released the debt of the next life" in Yuanqu anthology mentioned that "going to that abacus set my age", and so on. In literature and drama, abacus beads are used as metaphors. It is said that abacus beads have become more popular, and that abacus beads are relatively new. Therefore, it can be considered that abacus appeared in the middle of Yuan Dynasty, and was widely used in the late Yuan Dynasty and early Ming Dynasty< Some foreign scholars believe that the abacus appeared in the Han Dynasty, based on the fact that it was explicitly mentioned in the book of numerology written by Xu Yue of the Han Dynasty and annotated by Zhen Luan of the Northern Zhou Dynasty. Qian baocong (1892-1974), a mathematician and historian of mathematics in China, once proved that the book is a Book annotated by Zhen Luan relying on forgery. In the Northern Zhou Dynasty, multiplication and division were carried out at the upper, middle and lower levels, and there was no simplified formula for multiplication and division. Therefore, the abacus annotated by Zhen Luan was at best a counting tool or a simple abacus that could only be used for addition and subtraction, which was completely different from the later abacus
abacus was also spread to North Korea, Japan and other countries, which was of great significance to the development of these countries
6. If you save it directly, it will look like this.. You can view the properties, the URL to a new window, and then save it as... Or the address and download it with the download tool. I have encountered similar problems before. Hope to help you
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