Combat double power

1. Do you say PC? In my opinion, any computer has the ability of parallel computing. It depends on how you define it. Parallel computing and distributed system are both computing methods, not hardware specifications

each task in your operating system has a process, and each process is composed of many threads. If you've ever had an operating system class, you should have met multi threads programming. You let different threads cooperate to complete the same task, which is actually called parallel computing and distributed processing.

you can see that the projects of those parallel computing classes also run algorithms with ordinary computers, The key point is that you will simulate this environment. Just like those who run network algorithms use socket to simulate, they also use a PC to simulate the network of N workstations.

if you say multi-core CPU, First of all, you don't have access to the firmware of ordinary motherboards. So you have to buy a programmable board of general purpose, But if you want to buy a multi-core basic, you can't find it... Only in the laboratory can you have it... Even if you find it... I think that the money for that board is estimated to be several times of the tuition for you to go to graate school and then enter the laboratory...

in a word, if the software is implemented, today's PC should have no problem, As for how to start parallel computing mode, you need to read the datasheet of this board.

I don't agree with the above saying that there must be two cores, People with two brains can do parallel. But the left brain and the right brain of one brain are also parallel. When refining different neurons, the other completely independent neuron is also parallel. Parallel is a way to solve problems, an idea. Parallel computing was first proposed in 1912. I can't remember when the multi-core processor appeared, But after 2000, at least

2.

Wu Wei, director of the mechanical equipment department of the Instrial Development Department of the national development and Reform Commission, said that in the future, automobiles made in China will have the most integration of new technologies and innovations in the world, and will also lead the global automobile instry

at the same time, the competition in the automotive chip field is also extremely fierce. Compared with the chips of consumer electronics procts, automotive chips have higher requirements for safety and stability, which is a common problem faced by the chip instry and an opportunity for Chinese chip companies

conclusion: self developed technology makes Zero run more competitive

Zero run car is the first self-developed auto driving chip among the new Chinese car making enterprises, and the Zero run car C11 with this chip will be released next month. The rapid progress of Zero run vehicles in the field of automatic driving has also been recognized by users

According to the statistical data, the sales volume of the two mass-proced models of Zero run Auto has graally increased since July this year. The sales volume has exceeded 1000 in September, and is expected to exceed 1600 in October. A large number of self-developed technologies have made Zero run a new force of car making more competitive

this article comes from the author of car home, which does not represent the standpoint of car home

3. How to improve the ability of mathematical calculation

first, the improvement of the ability of calculation requires the study of hard theories and rules.
the correct operation must be based on a thorough understanding of calculation theory. The calculation theory in students' mind is clear and the rules are firmly remembered. When doing four calculation problems, it can be carried out in an orderly way. There are two mistakes in integer multiplication, 25 times 3 equals 95, 24 times 5 equals 100, which typically reflects that students do not have a thorough understanding of multiplication theory in the process of learning arithmetic, and how to deal with the number of multiplication carry is relatively vague. Furthermore, divisor is a decimal division in the two wrong cases (1). 44 divided by 1. 8 equals 8, 11. 2 divided by 0.05 equal to 22.4) also shows that the students' understanding of the law is not deep enough
to understand the meaning of the order and operation law, the operation order refers to the operation of the same level from left to right. In the formula without brackets, if there are addition, subtraction, multiplication and division, multiplication and division should be calculated first, then addition and subtraction; If you have brackets, you should first count the ones in the brackets, and then count the ones in the brackets. Primary school textbooks mainly talk about the law of exchange and combination of addition, and a property of subtraction: "subtracting the sum of two numbers from a number is equal to subtracting two addends from the number in turn." And the commutative law, associative law and distributive law of multiplication. These laws are applicable to the operation of integers, decimals and fractions at the same time, and are widely used. In the two wrong examples [327 - (27 + 75) = 375, 87 times 2 divided by 87 times 2 = 1], both show the students' wrong understanding of the calculation law and the operation law< Second, the improvement of computing power needs to pass, understand and master basic knowledge. In order to get the calculation results, students should first consider what mathematical concepts, operation laws, operation properties, operation rules and calculation formulas to use. Therefore, fully understanding and mastering these basic knowledge determines whether they have the ability of calculation. For example, if students want to have the ability to calculate four items of scores, they must first understand the meaning and nature of scores, understand and master the basic knowledge and corresponding basic skills such as general score, approximate score, the interaction between score and false score. Only when the relevant basic knowledge is explained clearly and the students really master it, the students will not make mistakes in calculation. Compared with the lower grades, the basic knowledge of the higher grades is more abundant. Therefore, we must not rush for success in teaching. We should help students start from sorting out the basic knowledge they have learned, use the transfer, and continue to deepen. For example, when teaching the addition of fractions with different denominators, first ask the students to answer the meaning of addition, and they will know that it is the operation of combining two numbers (or more numbers) into one number. Next, let the students observe and find that the fractions with different denominators and the units of fractions are different, and they can't add directly. After understanding this, they can guide the students to use the knowledge of general division to "turn differences into similarities", So the problem is transformed into the addition of fractions with the same denominator< Third, the improvement of calculation ability needs excellent oral calculation ability.

the new curriculum standard points out: "the basic and developmental nature of mathematics should be highlighted in the compulsory ecation stage." As for the ability of oral calculation, it is the basis of learning mathematics, and the level of oral calculation ability has an extremely important impact on students' basic calculation ability; The training of oral arithmetic is helpful to cultivate students' keen observation; It is helpful to cultivate students' comprehensive thinking ability; It is helpful to cultivate students' quick reaction ability; It is helpful to the cultivation of students' innovative consciousness. How to train the ability of oral arithmetic is an important subject worthy of discussion and research. Teaching practice tells us that it is very necessary to train students' oral arithmetic ability, and we should pay enough attention to it< Fourth, the improvement of computing ability needs to cultivate students' good computing habits.

to improve students' computing ability, we must pay attention to the cultivation of good computing habits< Make students form the habit of proofreading carefully

2. Students are required to see each data and operation symbol clearly, determine the operation order, and choose a reasonable operation method

3. Make students form the habit of careful calculation and standardized writing. Students are required to write neatly, with correct format, correct handwriting, no scribble, no alteration, and keep their homework neat and beautiful< 4. Make students form the habit of estimation and self-conscious checking. Give them the method of checking calculation and estimation, and take checking calculation as an important part of the calculation process to carry out strict requirements, advocating the use of estimation to check the correctness of the answers

5. Make students form the habit of mutual inspection. When a problem has been initially calculated, it can't be calculated completely. It's inevitable for students to make some mistakes in calculation, which requires students to check carefully

6. Be good at drafting.

4. Apple's serial number does not contain the letter O, only the number 0. After modification, the serial number you provided is still invalid. Check whether the serial number record is correct. Otherwise, it does not belong to Apple procts
confirm whether your phone is iPhone 4 8GB black. Otherwise, it can be confirmed that the machine is a high imitation machine. It's not a real machine
the beginning of serial number c3k is the official renovation, which is provided for after-sales service to replace the faulty machine.

5. 1、 In teaching, to enable students to understand and master the basic knowledge of computing, which is the premise of improving students' computing ability
primary school students often make mistakes in the process of computing e to various reasons, many parents and even teachers are completely attributed to their children's carelessness. In fact, this is only one of the reasons. To a large extent, it is the lack of comprehensive ability of children in calculation. For example, the basic knowledge such as operation law, operation property, operation law and calculation formula is not mastered or cannot be used reasonably and flexibly. Even though the child is very careful and serious in the calculation, he makes seemingly simple mistakes e to the lack of basic knowledge. In teaching, we can't be in a hurry for success. We need to help students find out the reasons (such as incomprehensible calculation theory, incomprehensible laws, unclear nature, unfamiliar laws, not mastering formulas, etc.), find out the omissions and fill the gaps, clear up the obstacles, and do a good job in basic work for further learning calculation
Second, in teaching, it is necessary to cultivate students' interest in computing, which is the key to improve students' computing ability
Einstein once said, "interest is the best teacher.". Confucius also said: "those who know are not as good as those who know well, and those who know well are not as good as those who are happy.". They all talked about the importance of interest. In the teaching of computing, we should stimulate students' interest in computing, let them fall in love with computing and be willing to do it. Only in this way can our teaching of computation be successful. Therefore, we should combine the content of teaching, pay attention to the diversification of training forms, teach in fun, so that the boring teaching of computing is full of vitality. For example, we can use multimedia, cards and other available learning aids and teaching aids to train students in such ways as visual calculation, listening calculation, snatching calculation, in-game calculation, calculation competition and self-made calculation, so as to fully mobilize students' enthusiasm, change students' passivity into initiative, and graally form a lasting interest in calculation
thirdly, in teaching, we should cultivate students' good computing habits, which is the guarantee of improving their computing ability
good computing habits directly affect the formation and improvement of students' computing ability. When doing the calculation problems, some students often have the attitude of contempt. Some calculation problems are not unable to do, but e to the bad habits of insufficient concentration, ing wrong problems, careless calculation, not checking calculation, etc. Therefore, in the teaching of calculation, it is also very important to pay attention to the cultivation of students' good calculation habits. In teaching, we should try our best to make the students form the habit of concentration, careful calculation, careful ing, conscious inspection, conscious estimation and checking. In addition, teachers should strengthen the guidance of writing format. The standard writing format can help students to prevent wrong writing, missing writing numbers and operation symbols, rece the chance of error, and improve the accuracy of calculation
Fourth, in teaching, we should strengthen practice, which is the magic weapon to improve our computing ability
Confucius said, "learn while you learn", "review the old and learn the new", which shows the necessity of practice. Only on the basis of mastering the calculation method, strengthen the practice, can we improve the speed and accuracy of calculation. Only in this way can we realize the knack of calculation and improve the ability of calculation in an all-round way. Of course, we should pay attention to the diversity of training strategies and methods, so as not to cause students' boring mood. For example, the training content should have levels: basic training (the purpose is to master the rules, operation laws, operation properties, calculation formulas, etc.); Targeted training (the purpose is to correct where students are most likely to make mistakes); The purpose of special training is to improve the speed and accuracy of calculation by strengthening memory and remembering commonly used calculation values. For example: the proct of the approximate value of PI 3.14 and one digit, the simplest fraction with denominator of 2, 4, 5, 8, 10 and the interaction of decimals, etc.) Training methods should be diverse, such as: competition, can improve speed; Game style, can improve interest and so on. There are many ways of training, such as: using multimedia; Use simple teaching aids and learning aids (self-made calculation cards, counters, playing cards, etc.)< In teaching, we should strengthen the training of oral arithmetic, which is a shortcut to improve the ability of calculation
oral calculation is the basis of calculation. The strength of oral calculation ability directly affects the speed and accuracy of students' calculation, so we should pay attention to the cultivation of oral calculation ability. First of all, classroom teaching should avoid rigid and single. It can be used in various forms. For example: the form of game can be used in the junior grade: such as "driving a train", "looking for friends", "looking for house number", "sending a letter", "right password", "winning the red flag", "breaking the barrier", etc; The middle grade can use the mental arithmetic board, the mental arithmetic table, the card, the slide or the game to carry on the training; Senior training methods can be named answer, rush answer, all answer, listen to count, count, etc; If we use the above different forms of training methods, if possible, adhere to the appropriate oral arithmetic training before each class, I believe it will be able to quickly improve students' computing ability< Sixth, encourage students to use oral arithmetic in life, which is an essential way to improve students' oral arithmetic ability
we should encourage students to use computing knowledge in our life, so as to make students have a sense of achievement and obtain pleasure. In this way, students will pay more attention to computing and mathematics, so as to improve their interest in learning mathematics. We know: computing is the most widely used in our life. Teachers can get the cooperation of parents, and often let students consciously participate in the calculation of shopping, car ride, travel and other expenses. This can not only improve students' awareness of the application of oral arithmetic, but also improve students' computing ability. It's really a double win with one stone
in short, computing teaching is a long-term and complex teaching process, and it is not a matter of one day to improve students' computing ability. It needs the joint efforts of teachers, parents and children to achieve good results. I hope that teachers, in the future in the teaching of computing bear fruitful results.

6.

For those pupils with poor grades, it is very difficult to learn primary school mathematics. In fact, primary school mathematics belongs to the basic knowledge, and it is relatively easy to master certain skills. In primary school, it is a period that needs to develop good habits. It is important to pay attention to the cultivation of children's habits and learning ability. What skills do primary school mathematics have

It can be seen from this that the skill of primary school mathematics is to do more exercises and master basic knowledge. In addition, it is mentality. If you can't be timid before the exam, it's very important to adjust your mentality. Therefore, you can follow these skills to improve your ability and make yourself enter the ocean of mathematics

7. Main board: gigabyte-g41 (more than 500 video memory)
memory: Kingston 2G
Display: aoc19 inch (self-made model)
hard disk: Western Digital 320
others are determined according to their own needs
I bought the whole machine here in Zhongshan City, Guangdong Province, and the price is about 2650 yuan (I think it's very cheap)<

it is recommended to buy second-hand ones online:
if you are interested, you can buy second-hand ones online. For example, I bought a cup (main frequency 2.2g), which costs 33 yuan (plus postage 9 yuan, a total of 42 yuan, it is estimated that the brand-new can buy about 300 yuan). With this cup, you can play large-scale games such as Tomb Raider 7, Roman total war and so on. It's no problem, super cost-effective! The memory and motherboard are easy to use, and they are ridiculously cheap. Here I will not give examples one by one. If you are interested, you can go online shopping, but you should also pay attention to the poor flexibility of online shopping, so you need to make more comparisons.

8. Is the living allowance of Huawei's two wings true? I really don't know. I haven't seen any public reports. Where do you come from?

9. Computing is closely related to everyone's life and proction, and plays an irreplaceable role in reality. If thinking is the heart of mathematics, then calculation is the aorta of mathematics. Therefore, the teaching efficiency of computing teaching will affect students' potential for mathematics learning
computing is a simple thing for teachers, but computing teaching is a profound art. Therefore, we can't treat calculation teaching with our own calculation standard. Every computing class should be fully pre-set from the perspective of learning, including class objectives, key and difficult points, driving classroom questioning, classroom situation, teaching links, etc. Only in this way can we say that with sufficient presupposition, teaching can be used freely, and easy and effective classroom can be created. Therefore, our teaching should come from the students' learning, and should be guided according to the situation, so as to achieve the teaching goal
then, how to improve students' computing ability
first, cultivate good attention quality
aiming at the three characteristics of primary school students: low attention stability, small distribution span and poor transfer ability. Teachers should try their best to let students finish their homework in class. When students do their homework, in order to ensure that students' attention is consciously focused and kept on the homework, teachers should try their best to keep the classroom quiet. Teachers should not give guidance to the whole class, and indivial guidance should not be too loud. The adverse effects of distraction should be eliminated to the greatest extent. For more abstract and step-by-step calculation, teachers should let students repeatedly perceive and give necessary hints to attract students' attention. Teachers can also change the way to train students to show their calculation ability, such as: the way to show oral arithmetic questions, changing the previous way to look at a question card, and then immediately take back the card, and then let the students report the answers, so as to enhance the training intensity and strengthen the intentional attention. At the same time, in the process of calculation, students should try their best to keep their attention on the homework< Second, improve the ability of memory in calculation. First of all, we need to extract the calculation facts from the long-term memory and put them in the working memory. At the same time, we also need the participation of memory in the calculation process, so that the calculation can be carried out correctly. For example, in daily life, let students take part in some memory games to improve their memory. We also need to make students insist on oral arithmetic. Being proficient in oral arithmetic is the basis of correct written arithmetic. Any four mixed arithmetic problems are synthesized by oral arithmetic problems. Both oral and written arithmetic are inseparable from instantaneous memory, and oral arithmetic is the best form of students' short-term memory. The design of oral arithmetic exercises by teachers should be targeted, from easy to difficult, and graally improve, including some simple calculation problems. Persistent training not only cultivates memory ability, but also forms good thinking quality< Third, strengthen students' serious attitude towards calculation
when students lack purpose in the process of calculation, their attitude is often random, they don't care about the correctness of calculation, they care about when to complete the task. Teachers can give some examples of daily life to guide students. For example, when an engineer designed a bridge, e to the wrong decimal point in the calculation, the completed bridge became a dangerous bridge, which not only wasted the resources of the country, but also seriously endangered the safety of the people. So as to strengthen their will to complete the calculation seriously
at the same time, in the calculation, the errors of primary school students always emerge in an endless stream. Psychologist Thorndike believes that "trial and error are the basic forms of learning". Therefore, in the process of primary school students' learning, mistakes are inevitable. Teachers should not blame students for their mistakes. The key point is that teachers should discuss with students, make clear why they made mistakes and what step they took, help students find out the causes of calculation errors, and guide students to learn from their mistakes< Fourth, strengthen the targeted practice
in primary school mathematics, there are many calculations that are related and different. Teachers can put together the concepts, rules, theorems and formulas that are easy to be confused, so that students can fully perceive, distinguish and distinguish them, so that they can make clear the essential characteristics in the discrimination, master the connection and difference between the new and old knowledge, and actively prevent the stereotype of thinking
for example: four mixed operation exercises:
96-3 × thirty-two ÷ 4 96-4 × thirty-two ÷ 4
96-3 × thirty-two ÷ 4 96-4 × thirty-two ÷ 4)
make students distinguish the differences and relations among the same level, different level and operation with brackets, so as to grasp their own essential characteristics< 5. To cultivate good calculation habits of primary school students
good calculation habits of primary school students can not only help them master calculation theory and cultivate their interest in mathematics learning, but also help them overcome the psychological factors causing calculation errors, which is the guarantee of improving their calculation ability. Therefore, it is very necessary to cultivate the calculation habit of primary school students. There are three steps for teachers to cultivate pupils' habit of calculation, which are as follows:
1. Correct examination is the prerequisite for pupils' correct calculation, and its four steps are: first reading, second reading, third thinking and fourth calculation“ "Read" is a serious reading topic, "see" is to see the data, operation symbols, operation order in the topic, "think" is to think of the calculation method and order that should be used, "calculate" is to calculate according to the thought. For example, four arithmetic questions "36 + 4" × 10-7.5) "in the calculation process, read the questions first to see which operations (+ ×、-， Think about what to calculate first, and then what to calculate (in language description: first calculate the difference of "10-7.5", then calculate the proct of "4 times the difference", and finally calculate the sum of "36 plus proct"), and then calculate according to the order of thinking, so that the calculation can be carried out in an orderly way, thus recing the calculation errors< Careful writing is a necessary condition for pupils to calculate correctly. Therefore, in the calculation of primary school students, whether it is ing or off type calculation, the teacher strictly requires standard format, neat writing, clean paper surface (even if the draft also requires clear handwriting), every step of writing should be "back" carefully proofread, and then continue the next step of calculation after confirming that their ing and calculation are correct
3. Careful checking
checking is the guarantee of correct calculation. The teacher should strengthen the demonstration in the classroom teaching, improve the students' understanding of the importance of checking calculation, and develop the conscious behavior of checking calculation after the problem. The teacher can also guide the students to create a variety of checking calculation methods, such as heavy algorithm, inverse algorithm, alternative solution, estimation method, transposition method, substitution method, etc., so that the students can not only improve their interest in checking calculation, enhance their checking ability, and graally form the habit of checking calculation, But also cultivate students' thinking ability
it can be seen that computing teaching is a long-term and complex teaching process, and the improvement of students' computing ability is not a matter overnight. As long as we teachers study hard, summarize and improve our work, dig out the ability factors in computing problems seriously, and work together with students, students' computing ability will be improved
applied problem teaching is also a very important part in primary school mathematics teaching. To cultivate students' ability to solve practical problems, we should start from the following aspects
(1) cultivating students' habit of examining questions
careful examination and understanding of the meaning of questions are the prerequisite for solving practical questions accurately. Therefore, in teaching, students can first find out the direct and indirect conditions according to the requirements of solving problems, build the relationship between conditions and problems, and determine the quantitative relationship. In order to analyze the relationship between the known quantity and the unknown quantity in the problem, students can be asked to think while reading the problem, mark the conditions and problems with different symbols, or express the known conditions and problems with line diagram. In order to cultivate children's habit of careful examination, I often put some confusing questions at the same time, let students analyze and calculate. For example: (1) there are 3000 sci-tech books and story books in the library. The number of sci-tech books is two-thirds of that of story books. How many sci-tech books are there
② there are 3000 storybooks in the library, and the number of science and technology books is 2 / 3 of the storybooks. How many science and technology books are there
there are several 3000 volumes in question 1, and 3000 volumes in question 2 are one, so the calculation method is different. If you do this kind of exercises often, you can easily form the habit of examining questions carefully
(2) teach students the common reasoning methods of analyzing practical problems
in the process of solving problems, students are often used to imitate the solutions of teachers and examples, and complete them mechanically. Therefore, it is very important to teach students the reasoning method of analyzing practical problems and help students to understand the way of solving problems. Analysis method and synthesis method are commonly used analysis methods. The so-called analytical method is to analyze the problems from the application problems, first consider what conditions are needed to solve the problems, and which of these conditions are known and which are unknown, until the unknown conditions can be found in the problems. For example: car a transports 300 kg of coal at a time, car B transports 50 kg more than car a, and how many kg of coal do two cars transport at a time
instruct students to dictate how many kilos of coal are required to be transported by two vehicles at a time? Which two conditions must be known according to the meaning of the question? Which of the conditions listed in the question is known (by car a), which is unknown (by car B), and what should be sought first (300 + 50 = 350 by car B)? Then what do you ask (how many kilos of coal are used for two cars, 300 + 350 = 650)
the synthesis method is based on the known conditions of application problems, and deces the required problems through analysis. For example, to guide students to think like this: knowing that car a carries 300 kg of coal, car B uses 50 kg more than car a, we can find out the weight of coal carried by car B (300 + 50 = 350). With this condition, we can find out how many kg of coal the two cars carry in total 300+350=650 From the two solutions of the above problems, we can see that whether we use the analytical method or the comprehensive method, we should combine the known conditions of the application problems with the problems we seek. The problems we seek are the direction of thinking, and the known conditions are the basis for solving the problems
(3) comparative analysis of easily confused problems
some related and easily confused practical problems can guide students to make comparative analysis, for example: how much is the fraction of a number and the known fraction of a number, and the practical problems of solving this number are often easily confused by students. First, they can't tell whether to use multiplication or division; Secondly, it is not necessary to add brackets when the calculation is not clear. Therefore, the following group of questions can be arranged for comparative teaching
① there are 240 pear trees in the orchard, and apple trees account for 1 / 3 of pear trees. How many apple trees are there
② there are 240 pear trees in the orchard, accounting for 1 / 3 of the apple trees. How many apple trees are there
③ there are 240 pear trees in the orchard, one third less apple trees than pear trees. How many apple trees are there< (4) there are 240 pear trees in the orchard, one third less than apple trees. How many apple trees are there
⑤ there are 240 pear trees in the orchard, one third more apple trees than pear trees. How many apples are there< There are 240 pear trees in the orchard, one third more than apple trees. How many apple trees are there
when comparing two numbers, the following number is the standard number and the preceding number is the comparison number, that is, who is compared with is the standard number (usually set the standard number as 1). Given a number, find it

10.

The old world is collapsing, and the new world has not yet been named

the automobile instry is entering an era of great change that never happened in a hundred years. The technological revolution promotes the restructuring of the global automobile instry pattern and order. Traditional automobile giants such as Volkswagen, Ford and general motors are driving into the no man's land with uncertain prospects. The alliance between Nissan and Renault is in danger. Peugeot Citroen and Fiat choose to embrace each other for warmth when the cold winter comes

new car technology: the last question is that the market share of Chinese brand passenger cars has decreased significantly this year. When do you think the lowest point will appear and when will it begin to reverse

Bao Siyu: I think in the future, foreign brands may still dominate China's luxury car market, but Chinese brands will certainly dominate the car market with less than 200000 yuan. This year's Beijing auto show is a turning point of software defined automobile. The overall hardware strength of China's automobile has infinitely approached or partially surpassed that of foreign brands

in terms of software strength such as intelligent Internet connection, China automobile has taken the lead. Especially after the software enters the fast iteration, it will form the data accumulation and iteration. Through a large number of data verification, it can better meet the needs of customers. I think the future of Chinese automobile must be good

this article comes from the author of car home, which does not represent the standpoint of car home