Big calculation
Publish: 2021-04-16 18:04:23
1.
Before the main network of IPFs filecoin was launched, the specific mining yield could not be calculated effectively and accurately, and the mining computing power of filecoin became a complex composed of bandwidth, hard disk space, network coverage and other factors
what the data storage market needs to contribute is hard disk storage space. The more hard disk space, the higher the mining capacity; Provide network bandwidth and get fil by mining bandwidth resources; The mining machine developed by interstellar continent based on the technical points disclosed in IPFs and filecoin white paper has more advantages in computing power
2. In the primary school mathematics test questions, the questions involving calculation content account for more than 85% in a test paper. Therefore, it is a very important task for students to strengthen the calculation training and effectively improve the accuracy of calculation. The actual situation shows that the accuracy of a student's calculation is directly proportional to his oral calculation ability. So how to improve the computing power? Please take a look at the following training methods< Basic training
different age of primary school students, the basic requirements of oral arithmetic are also different. Low and middle grade students mainly add one or two digits. It is better for senior students to take the one digit by two digit mental arithmetic as the basic training. The specific requirement of oral arithmetic is to multiply the number of one digit and the number of ten digits of two digits, and then add the proct of multiplying the number of one digit and the number of one digit of two digits to the three digits, and quickly say the result. This mental arithmetic training includes the practice of several spatial concepts, digital comparison and memory training. In primary school, it can be said that it is a sublimation training of abstract thinking of numbers. It is very beneficial to promote the development of people's thinking and intelligence. You can arrange this exercise in two periods. One is to read early, the other is to arrange a group after homework. Each group is divided as follows: one digit is optional, corresponding to the number of one digit or ten digit in two digits. There are 18 questions in each group. Write the formula first, then write the number directly after several times of oral calculation. After a period of time, you will find that your speed and accuracy will be greatly improved< 2. Targeted training
the main form of the number of senior grades in primary school has changed from integer to score. In the number of operations, I believe we do not like the different denominator fractional addition, right? Because it's too error prone. Now, please think for yourself, is the addition (subtraction) method of different denominators only in the following three cases
1. For two fractions, the large number in the denominator is the multiple of the decimal
for example, "1 / 12 + 1 / 3", in this case, oral arithmetic is relatively easy. The method is: the big denominator is the common denominator of two denominators. As long as the small denominator is expanded by multiple, until it is the same as the big number, the denominator is expanded by several times, and the numerator is also expanded by the same multiple, It can be calculated by adding the same denominator fraction: 1 / 12 + 1 / 3 = 1 / 12 + 4 / 12 = 5 / 12
2. The denominator of two fractions is coprime
this kind of situation is more difficult in form, and I believe you are also the most headache, but it can be changed into easy: after it is divided, the common denominator is the proct of the two denominators, and the numerator is the sum of the proct of the numerator of each fraction and the other denominator (if it is subtraction, it is the difference of the two procts), such as 2 / 7 + 3 / 13. The oral calculation process is: the common denominator is 7 × 13 = 91, molecule 26 (2 × 13)＋21(7 × 3) = 47, the result is 47 / 91
if the molecules of both fractions are 1, the oral calculation is faster. For example, "1 / 7 + 1 / 9", the denominator is the proct of two denominators (63), and the numerator is the sum of two denominators (16)
3. Two fractions and two denominators are neither coprime numbers nor multiples of decimals
in this case, we usually use the short division method to get the common denominator. In fact, we can also directly calculate the general score in the formula and get the result quickly. The common denominator can be obtained by enlarging the large number in the denominator. The specific method is: to double the large denominator (large number) until it is a multiple of another denominator decimal. For example, 1 / 8 + 3 / 10 expands the large number 10, 2 times, 3 times and 4 times, and compares it with the decimal 8 every time to see if it is a multiple of 8. When it is expanded to 4 times, it is a multiple of 8 (5 times), then the common denominator is 40, and the numerator is expanded by the corresponding multiple and then added (5 + 12 = 17), and the number is 17 / 40
after reading the above, have you found the rule of mental arithmetic in every situation? So as long as you practice more and master it, the problem will be solved< (3) memory training
do senior students feel that sometimes the calculation content in the topic is very extensive? Some of these operations have no specific rules of oral arithmetic, so I have to solve them through memory training. The main contents are as follows:
1
2. The proct of the approximate value of PI 3.14 with one digit and with several common numbers 12, 15, 16 and 25
3. The denominator is the decimal value of the simplest fraction of 2, 4, 5, 8, 10, 16, 20 and 25, that is, the interaction between these fractions and decimals
the results of the above numbers, whether in daily work or in real life, are used very frequently. After mastering and remembering them, they can be transformed into abilities and proce high efficiency in calculation< 4. Regular training
1. Mastering the law of operation. There are mainly five laws in this aspect: commutative law and associative law of addition; Commutative law, associative law and distributive law of multiplication. Among them, the multiplication distribution law is widely used and has many forms, including positive use and negative use, and the forms of integer, decimal and fraction. In the multiplication of fractions and integers, we often ignore the application of the law of distribution of multiplication, which makes the calculation complicated. Such as 2000 / 16 × 8. If we use the law of multiplicative distribution, we can calculate the result of 1000 by mouth directly. But if we use the general method of recing false fraction, it is time-consuming and easy to make mistakes. In addition, there are subtraction properties and quotient invariant properties< 2. Regular training. It is mainly the oral calculation method of the square result of the two digit number of 5
3. Master some special cases. For example, in fractional subtraction, if the numerator is not enough to be subtracted after general division, and the numerator subtracted is usually larger than the numerator subtracted by 1, 2, 3 and other smaller numbers, no matter how big the denominator is, it can be directly calculated orally. For example, the difference between 12 / 7 and 6 / 7 is only 1. The difference between 12 / 7 and 6 / 7 must be 1 less than the denominator. The result is 6 / 7 without calculation. Another example is: 194 / 99-97 / 99, if the difference between the numerator and denominator is 2, the difference between the numerator and denominator is 2, and the result is 97 / 99. When the subtracted molecule is larger than the subtracted molecule by 3, 4, 5 and other smaller numbers, the result can be quickly calculated orally. Another example is the mental calculation of the proct of any two digit number and 1.5, which is two digits plus half of it< 5. Comprehensive training
1
2< 3. Comprehensive training of four mixed operation sequences
comprehensive training is concive to the improvement of judgment ability, reaction speed and the consolidation of oral arithmetic
of course, we need to persevere in the above situations. Otherwise, it is difficult to achieve the expected effect if we fish for three days and dry the net for two days
the above five kinds of training should be carried out step by step, but also persevere. It will take some time to improve your math scores. Don't be too eager to succeed.
different age of primary school students, the basic requirements of oral arithmetic are also different. Low and middle grade students mainly add one or two digits. It is better for senior students to take the one digit by two digit mental arithmetic as the basic training. The specific requirement of oral arithmetic is to multiply the number of one digit and the number of ten digits of two digits, and then add the proct of multiplying the number of one digit and the number of one digit of two digits to the three digits, and quickly say the result. This mental arithmetic training includes the practice of several spatial concepts, digital comparison and memory training. In primary school, it can be said that it is a sublimation training of abstract thinking of numbers. It is very beneficial to promote the development of people's thinking and intelligence. You can arrange this exercise in two periods. One is to read early, the other is to arrange a group after homework. Each group is divided as follows: one digit is optional, corresponding to the number of one digit or ten digit in two digits. There are 18 questions in each group. Write the formula first, then write the number directly after several times of oral calculation. After a period of time, you will find that your speed and accuracy will be greatly improved< 2. Targeted training
the main form of the number of senior grades in primary school has changed from integer to score. In the number of operations, I believe we do not like the different denominator fractional addition, right? Because it's too error prone. Now, please think for yourself, is the addition (subtraction) method of different denominators only in the following three cases
1. For two fractions, the large number in the denominator is the multiple of the decimal
for example, "1 / 12 + 1 / 3", in this case, oral arithmetic is relatively easy. The method is: the big denominator is the common denominator of two denominators. As long as the small denominator is expanded by multiple, until it is the same as the big number, the denominator is expanded by several times, and the numerator is also expanded by the same multiple, It can be calculated by adding the same denominator fraction: 1 / 12 + 1 / 3 = 1 / 12 + 4 / 12 = 5 / 12
2. The denominator of two fractions is coprime
this kind of situation is more difficult in form, and I believe you are also the most headache, but it can be changed into easy: after it is divided, the common denominator is the proct of the two denominators, and the numerator is the sum of the proct of the numerator of each fraction and the other denominator (if it is subtraction, it is the difference of the two procts), such as 2 / 7 + 3 / 13. The oral calculation process is: the common denominator is 7 × 13 = 91, molecule 26 (2 × 13)＋21(7 × 3) = 47, the result is 47 / 91
if the molecules of both fractions are 1, the oral calculation is faster. For example, "1 / 7 + 1 / 9", the denominator is the proct of two denominators (63), and the numerator is the sum of two denominators (16)
3. Two fractions and two denominators are neither coprime numbers nor multiples of decimals
in this case, we usually use the short division method to get the common denominator. In fact, we can also directly calculate the general score in the formula and get the result quickly. The common denominator can be obtained by enlarging the large number in the denominator. The specific method is: to double the large denominator (large number) until it is a multiple of another denominator decimal. For example, 1 / 8 + 3 / 10 expands the large number 10, 2 times, 3 times and 4 times, and compares it with the decimal 8 every time to see if it is a multiple of 8. When it is expanded to 4 times, it is a multiple of 8 (5 times), then the common denominator is 40, and the numerator is expanded by the corresponding multiple and then added (5 + 12 = 17), and the number is 17 / 40
after reading the above, have you found the rule of mental arithmetic in every situation? So as long as you practice more and master it, the problem will be solved< (3) memory training
do senior students feel that sometimes the calculation content in the topic is very extensive? Some of these operations have no specific rules of oral arithmetic, so I have to solve them through memory training. The main contents are as follows:
1
2. The proct of the approximate value of PI 3.14 with one digit and with several common numbers 12, 15, 16 and 25
3. The denominator is the decimal value of the simplest fraction of 2, 4, 5, 8, 10, 16, 20 and 25, that is, the interaction between these fractions and decimals
the results of the above numbers, whether in daily work or in real life, are used very frequently. After mastering and remembering them, they can be transformed into abilities and proce high efficiency in calculation< 4. Regular training
1. Mastering the law of operation. There are mainly five laws in this aspect: commutative law and associative law of addition; Commutative law, associative law and distributive law of multiplication. Among them, the multiplication distribution law is widely used and has many forms, including positive use and negative use, and the forms of integer, decimal and fraction. In the multiplication of fractions and integers, we often ignore the application of the law of distribution of multiplication, which makes the calculation complicated. Such as 2000 / 16 × 8. If we use the law of multiplicative distribution, we can calculate the result of 1000 by mouth directly. But if we use the general method of recing false fraction, it is time-consuming and easy to make mistakes. In addition, there are subtraction properties and quotient invariant properties< 2. Regular training. It is mainly the oral calculation method of the square result of the two digit number of 5
3. Master some special cases. For example, in fractional subtraction, if the numerator is not enough to be subtracted after general division, and the numerator subtracted is usually larger than the numerator subtracted by 1, 2, 3 and other smaller numbers, no matter how big the denominator is, it can be directly calculated orally. For example, the difference between 12 / 7 and 6 / 7 is only 1. The difference between 12 / 7 and 6 / 7 must be 1 less than the denominator. The result is 6 / 7 without calculation. Another example is: 194 / 99-97 / 99, if the difference between the numerator and denominator is 2, the difference between the numerator and denominator is 2, and the result is 97 / 99. When the subtracted molecule is larger than the subtracted molecule by 3, 4, 5 and other smaller numbers, the result can be quickly calculated orally. Another example is the mental calculation of the proct of any two digit number and 1.5, which is two digits plus half of it< 5. Comprehensive training
1
2< 3. Comprehensive training of four mixed operation sequences
comprehensive training is concive to the improvement of judgment ability, reaction speed and the consolidation of oral arithmetic
of course, we need to persevere in the above situations. Otherwise, it is difficult to achieve the expected effect if we fish for three days and dry the net for two days
the above five kinds of training should be carried out step by step, but also persevere. It will take some time to improve your math scores. Don't be too eager to succeed.
3. I think if we only know volume and velocity, we can't find the force. i 'm sorry!
4.
the daily cash withdrawal limit of ATM is 20000 automatic teller machine, also known as ATM, is the abbreviation of automatic teller machine, which means automatic teller machine. Because most of it is used for withdrawal, it is also known as ATM. It is a highly precise mechatronics device, using magnetic code card or smart card to achieve self-service of financial transactions, instead of the work of bank counter staff. It can withdraw cash, inquire deposit balance, transfer funds between accounts, inquire balance, etc; It can also carry out cash deposit (real-time entry), check deposit (none in China), passbook re registration, intermediate business, etc. Cardholders can use a credit card or savings card to make automatic withdrawal, balance inquiry, transfer, cash deposit, passbook re registration, purchase funds, change passwords, and pay mobile phone bills according to their passwords
different ATM settings are different, some are single transaction 2000, some are 2500, 3000, at most 5000 per transaction; At the time of withdrawal, ATM will prompt the maximum amount of each withdrawal
5. Based on the decentralized characteristics of blockchain technology, the application of blockchain technology can be said to be more, but at present, the substantive application is still less, mainly applied in the fields of finance, medical treatment, authentication, smart contract, sharing economy, digital assets and so on. For example, Yingtang Zhongchuang's blockchain solution is mainly in the development of data encryption, transaction protection and data security transaction system, while other enterprises are more focused on internal needs.
6. In fact, I think that doing more exercises can help, but simply doing more is not efficient. You should pay attention to summarize your weak links (or your error prone areas)
-
or you may think that this is very impractical, so I suggest you do it, know yourself objectively, and choose a certain number of questions at one time, Big questions or small questions are OK. Do the questions according to the attitude close to the test (small questions should also roughly write down your calculation process), check them, and then ask the teacher or classmates to help you or modify the answers yourself
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at this time, because everyone is prone to make mistakes in some links, So at this time, the mistakes that appear after correction are usually the most prone to make mistakes in your usual problem-solving, and you are usually the most impressed when you think about the problems after correction and write down your own mistakes. Next time you encounter the same type of calculation or corresponding calculation, you will pay attention to them.
-- in this case, I believe you can do the right things several times, You still don't make mistakes (ha ha, you can try it out) so you don't have to spend too much energy on these links,
-- if you accumulate more, you can basically sum up all the problems you will make, which will improve the effect better
(of course, the above suggestions are all suggestions, no matter what, it's better to have time to check after you finish the questions, For example, if you want to calculate the result, you can push it by inverse operation, if you want to calculate the equation, you can see if it's reasonable, etc.)
methods are always accumulated. Listen to other opinions, and if you think it's feasible, you can try it. After all, the method is dead, and it's the only way for people to use it properly.
-
or you may think that this is very impractical, so I suggest you do it, know yourself objectively, and choose a certain number of questions at one time, Big questions or small questions are OK. Do the questions according to the attitude close to the test (small questions should also roughly write down your calculation process), check them, and then ask the teacher or classmates to help you or modify the answers yourself
-
at this time, because everyone is prone to make mistakes in some links, So at this time, the mistakes that appear after correction are usually the most prone to make mistakes in your usual problem-solving, and you are usually the most impressed when you think about the problems after correction and write down your own mistakes. Next time you encounter the same type of calculation or corresponding calculation, you will pay attention to them.
-- in this case, I believe you can do the right things several times, You still don't make mistakes (ha ha, you can try it out) so you don't have to spend too much energy on these links,
-- if you accumulate more, you can basically sum up all the problems you will make, which will improve the effect better
(of course, the above suggestions are all suggestions, no matter what, it's better to have time to check after you finish the questions, For example, if you want to calculate the result, you can push it by inverse operation, if you want to calculate the equation, you can see if it's reasonable, etc.)
methods are always accumulated. Listen to other opinions, and if you think it's feasible, you can try it. After all, the method is dead, and it's the only way for people to use it properly.
7. Your situation is universal and not a big problem. My friend also had a similar problem. She said that when she was in primary school, she hit the top 100, junior high school was also very good, and when she was in senior high school, she was full of loopholes. The knowledge of high school needs relatively complex calculation. There are many factors to be considered in physics and mathematics problems. In fact, it is not "the decline of calculation ability", but too many factors interfere so that the energy of sharing calculation is occupied. Like watching movies and playing games on the computer, the picture quality of the game is much worse than that of the movie, but the game may be the computer crash. That's because computers have more to deal with than "picture quality.". It's the same with your calculations. In fact, it's not just the problem of the topic itself. In the process of growing up, people care about more and more factors. These things may be the interference of your calculation
how to solve it? In addition to more practice, there is no other way, but practice is not blind, to high school to do a problem to have a purpose, before doing a problem, we should first clear what this problem needs to pay attention to: for example, your calculation is easy to make mistakes, then write it step by step; If it's easy to get the title wrong, read it over and over again and tick out the main points. Do a problem to have the value of a problem, what you have to improve, what progress you have to be clear. College entrance examination is to let people become a machine to do questions, and practice makes perfect is the only choice
however, I said that "the machine of making questions" is not the only purpose of high school, but only one of the important purposes of high school. Whether you are a good learner or not does not depend on whether you are a question machine, because everyone is the winner of the college entrance examination. It's about how you become a problem machine. If you are purposeful, what adjustments have you made for the calculation errors, and what efforts have you made for the reading errors, then you can say that you are a good learner; On the contrary, if it is a headless and fly like tactics, then even the number one in the college entrance examination is useless
practice more, prepare the error book (even if it's careless, it's also your weakness, you should know where you are prone to make mistakes, you should write it down), do the problem purposefully (don't care whether you can finish it, care whether it's valuable to finish it), and communicate with teachers and friends more (not just study, don't sink in the sea of problems)
my classmate who has similar problems with you has 300 students in grade one and grade two of senior high school for a long time, and the students in grade three suddenly become less than 100, so he went to Zhejiang University for the college entrance examination. This is part of the experience she told me. I hope it can help you.
how to solve it? In addition to more practice, there is no other way, but practice is not blind, to high school to do a problem to have a purpose, before doing a problem, we should first clear what this problem needs to pay attention to: for example, your calculation is easy to make mistakes, then write it step by step; If it's easy to get the title wrong, read it over and over again and tick out the main points. Do a problem to have the value of a problem, what you have to improve, what progress you have to be clear. College entrance examination is to let people become a machine to do questions, and practice makes perfect is the only choice
however, I said that "the machine of making questions" is not the only purpose of high school, but only one of the important purposes of high school. Whether you are a good learner or not does not depend on whether you are a question machine, because everyone is the winner of the college entrance examination. It's about how you become a problem machine. If you are purposeful, what adjustments have you made for the calculation errors, and what efforts have you made for the reading errors, then you can say that you are a good learner; On the contrary, if it is a headless and fly like tactics, then even the number one in the college entrance examination is useless
practice more, prepare the error book (even if it's careless, it's also your weakness, you should know where you are prone to make mistakes, you should write it down), do the problem purposefully (don't care whether you can finish it, care whether it's valuable to finish it), and communicate with teachers and friends more (not just study, don't sink in the sea of problems)
my classmate who has similar problems with you has 300 students in grade one and grade two of senior high school for a long time, and the students in grade three suddenly become less than 100, so he went to Zhejiang University for the college entrance examination. This is part of the experience she told me. I hope it can help you.
8. CPU: Intel Core i5760 (box) 1250 yuan
CPU main frequency 2800MHz
maximum core frequency 3460mhz
external frequency 133MHz
bus type QPI bus
number of cores four cores
number of threads four threads
first level cache 128KB
second level cache 4 × 256Kb
Level 3 cache 8MB
instruction set MMX, SSE, SSE2, sse3, sse4.1, sse4.2, EM64T
memory controller al channel DDR3 1066 / 1333
I don't need i7 platform because the motherboard problem still can't solve instruction set, so I won't talk about it. 8MB Level 3 cache
the addition of QPI technology, The real four core and four thread intelligent acceleration can make the CPU frequency up to 3.5G, which will work when you carry out
large-scale simulation modeling and calculation.
motherboard: ASUS p7p55d Deluxe 1150-1200 yuan
ASUS p7p55d 950-1100 yuan
support al channel DDR3 2200 (overclocking) / 160 yuan 0 / 1333 / 1066MHz memory
multi language BIOS (BIOS part is Chinese)
rich overclocking function (Rookie will also)
asus's high-end board of more than 800 yuan is well-known, needless to say, the quality. Although the price is expensive, some Chinese BIOS with rich overclocking function is cost-effective. As for other functions, I won't introce them in detail.
memory: Weigang 4GB DDR3 1600g (game Weilong Shuangtong) It costs 380-400 yuan
Kingston DDR3 1600 4G package (flge85f-b8ma9) 400-420 yuan
Yuzhan 4GB DDR3 1600 (Panther gold) 450-510 yuan
760 only supports the frequency of memory 1333, But for Intel's high-end CPU, it's very easy to synchronize super frequency with memory.
hard disk: WD 1TB 7200 to 32MB (serial port wd10eals) 320-350 yuan
the price of 1000g / 32MB cache of Western Digital Blue disk can't be reached by Seagate. Moreover, Seagate's after-sales service is just a dead letter, You can refer to Seagate's after-sales terms.
video card: Litai Quadro FX 1800 2700-3000 yuan
video memory type GDDR3
video memory capacity 768mb
video memory bit width 192bit
maximum resolution 2560 × 1600
bus interface PCI Express 2.0 16x
I / O interface al DisplayPort interface / DVI interface
physical characteristics
3D API DirectX 10 OpenGL 3.0
HDCP support is
other characteristics CUDA parallel processor core: 64
maximum power consumption: 59W
geometric processing power (number of triangles processed per second) 268.6 million
fill rate (pixels processed per second) (quantity) 17.6 billion
e to too many words in the introction items, it is recommended to go to the official inquiry
graphics card: sapphire FireGL v7600 2600-2900 yuan
video memory type GDDR3
video memory capacity 512MB
video memory bit width 256bit
bus interface PCI-E 16x
I / O interface S-Video interface (TV out) / al DVI interface
3D API DirectX 10 OpenGL 2.1 shader model 4.0
320 stream processors (SP)
supporting HDCP is another professional parameter
e to too many words in the introction, it is recommended to go to the official inquiry
optical drive: pioneer dvr-219chv 140 -- 160 yuan
Samsung's optical drive is known for its low performance and high performance price ratio.
power supply: Hangjia multi-core dh6 280 -- 320 yuan
amount The 400W Hangjia power supply is a big brand, The 12cm cooling fan is the best size for the standard mute effect.
chassis: Cool supreme special police 430 (rc-430-kwn1) 240-260 yuan
with this chassis, you don't have to worry about the heat dissipation when the computer is turned on all night.
Display: Philips 222el1sb 900-970 yuan
Philips Pu 221el2sb / 93 950 -- 1000 yuan
HP x22ledch 990 -- 1100 yuan
the above are all 21.5-inch LED screens. It is not recommended to have too large a screen when facing computers for a long time when doing modeling.
I don't need to answer these questions, such as mouse and keyboard, In the eyes of game players, the above graphics cards are garbage graphics cards, but in the hands of professionals, this is a graphics card that can't be compared with
4 * gts580 4 * HD5970 4 * hd6970. The latest generation of professional graphics cards has come out
the price of 6G video memory is as high as RMB 50000.
answer on the first floor: & quot; The new generation of i5 processor is comparable to the old generation of i7 Intel high-definition graphics card. The dynamic frequency Intel high-definition graphics card Intel quick sync video Intel touch 3D Technology Intel flexible display interface (Intel FDI) Intel clear video high-definition technology al display compatible with sotay gt470 extreme speed version supports CUDA parallel computing technology; Support PhysX physical acceleration technology; Support 3D vision stereoscopic display technology; Built in purevideo HD decoding engine; Built in 7.1 channel codec:
about high-definition, dynamic, 3D, garbage heap, who can use i5 processor + mainboard supporting i5 and still use centralized display? Gt470 is all based on games, which is useless to professional people. Even HD decoding has been brought in. It's a gt240 or higher level graphics card, which can be HDCP. Do you know? If you want to play Blu ray HD disc, you need to support HDCP. Do you understand? Built in 7.1 channel, which 2.1 channel sound you recommend can proce 7.1 sound effect?
CPU main frequency 2800MHz
maximum core frequency 3460mhz
external frequency 133MHz
bus type QPI bus
number of cores four cores
number of threads four threads
first level cache 128KB
second level cache 4 × 256Kb
Level 3 cache 8MB
instruction set MMX, SSE, SSE2, sse3, sse4.1, sse4.2, EM64T
memory controller al channel DDR3 1066 / 1333
I don't need i7 platform because the motherboard problem still can't solve instruction set, so I won't talk about it. 8MB Level 3 cache
the addition of QPI technology, The real four core and four thread intelligent acceleration can make the CPU frequency up to 3.5G, which will work when you carry out
large-scale simulation modeling and calculation.
motherboard: ASUS p7p55d Deluxe 1150-1200 yuan
ASUS p7p55d 950-1100 yuan
support al channel DDR3 2200 (overclocking) / 160 yuan 0 / 1333 / 1066MHz memory
multi language BIOS (BIOS part is Chinese)
rich overclocking function (Rookie will also)
asus's high-end board of more than 800 yuan is well-known, needless to say, the quality. Although the price is expensive, some Chinese BIOS with rich overclocking function is cost-effective. As for other functions, I won't introce them in detail.
memory: Weigang 4GB DDR3 1600g (game Weilong Shuangtong) It costs 380-400 yuan
Kingston DDR3 1600 4G package (flge85f-b8ma9) 400-420 yuan
Yuzhan 4GB DDR3 1600 (Panther gold) 450-510 yuan
760 only supports the frequency of memory 1333, But for Intel's high-end CPU, it's very easy to synchronize super frequency with memory.
hard disk: WD 1TB 7200 to 32MB (serial port wd10eals) 320-350 yuan
the price of 1000g / 32MB cache of Western Digital Blue disk can't be reached by Seagate. Moreover, Seagate's after-sales service is just a dead letter, You can refer to Seagate's after-sales terms.
video card: Litai Quadro FX 1800 2700-3000 yuan
video memory type GDDR3
video memory capacity 768mb
video memory bit width 192bit
maximum resolution 2560 × 1600
bus interface PCI Express 2.0 16x
I / O interface al DisplayPort interface / DVI interface
physical characteristics
3D API DirectX 10 OpenGL 3.0
HDCP support is
other characteristics CUDA parallel processor core: 64
maximum power consumption: 59W
geometric processing power (number of triangles processed per second) 268.6 million
fill rate (pixels processed per second) (quantity) 17.6 billion
e to too many words in the introction items, it is recommended to go to the official inquiry
graphics card: sapphire FireGL v7600 2600-2900 yuan
video memory type GDDR3
video memory capacity 512MB
video memory bit width 256bit
bus interface PCI-E 16x
I / O interface S-Video interface (TV out) / al DVI interface
3D API DirectX 10 OpenGL 2.1 shader model 4.0
320 stream processors (SP)
supporting HDCP is another professional parameter
e to too many words in the introction, it is recommended to go to the official inquiry
optical drive: pioneer dvr-219chv 140 -- 160 yuan
Samsung's optical drive is known for its low performance and high performance price ratio.
power supply: Hangjia multi-core dh6 280 -- 320 yuan
amount The 400W Hangjia power supply is a big brand, The 12cm cooling fan is the best size for the standard mute effect.
chassis: Cool supreme special police 430 (rc-430-kwn1) 240-260 yuan
with this chassis, you don't have to worry about the heat dissipation when the computer is turned on all night.
Display: Philips 222el1sb 900-970 yuan
Philips Pu 221el2sb / 93 950 -- 1000 yuan
HP x22ledch 990 -- 1100 yuan
the above are all 21.5-inch LED screens. It is not recommended to have too large a screen when facing computers for a long time when doing modeling.
I don't need to answer these questions, such as mouse and keyboard, In the eyes of game players, the above graphics cards are garbage graphics cards, but in the hands of professionals, this is a graphics card that can't be compared with
4 * gts580 4 * HD5970 4 * hd6970. The latest generation of professional graphics cards has come out
the price of 6G video memory is as high as RMB 50000.
answer on the first floor: & quot; The new generation of i5 processor is comparable to the old generation of i7 Intel high-definition graphics card. The dynamic frequency Intel high-definition graphics card Intel quick sync video Intel touch 3D Technology Intel flexible display interface (Intel FDI) Intel clear video high-definition technology al display compatible with sotay gt470 extreme speed version supports CUDA parallel computing technology; Support PhysX physical acceleration technology; Support 3D vision stereoscopic display technology; Built in purevideo HD decoding engine; Built in 7.1 channel codec:
about high-definition, dynamic, 3D, garbage heap, who can use i5 processor + mainboard supporting i5 and still use centralized display? Gt470 is all based on games, which is useless to professional people. Even HD decoding has been brought in. It's a gt240 or higher level graphics card, which can be HDCP. Do you know? If you want to play Blu ray HD disc, you need to support HDCP. Do you understand? Built in 7.1 channel, which 2.1 channel sound you recommend can proce 7.1 sound effect?
9. 1、 Question raised:
mathematics does not have an external reality, but a kind of relationship, a kind of knowledge of logical thinking, which shows some abstraction. Children live in the real world and have some experience of various things and phenomena in real life. On the other hand, children's thinking is still in the stage of concrete image thinking, They lack the basic concept of understanding the abstract relationship of things. Children in our class mainly rely on memory and proficiency to carry out calculation activities, which lack flexibility; In the process of observation, most of the children are not able to operate actively and are not interested in the experimental results<
2. Research objects:
48 children in class 2 of Da Da Da class
3. Experimental time:
March 2004 - July 2004
4. Experimental objectives:
1. Guide children to develop the habit of exploring surrounding things, thinking, asking questions, and actively answering questions, and be careful and attentive in the process of observation, And express their views with an objective attitude
2. In daily life or games, guide children to observe carefully and attentively, observe from different angles or continuously observe an object for a period of time, find out the reasons for the change of things, and learn simple reasoning
3. Guide children to classify and learn objects from different angles in games and daily life, and classify objects according to two dimensions at the same time. They have preliminary generalization ability< 5. Experimental steps:
(1) observation record form of children's basic situation in this class
ecational goal
reaching the standard
1. Learning ordinal number, odd and even number, adjacent number and other knowledge within 10, learning following number and inverted number<
significant: 38 people
not significant: 10 people
2. Learn the decomposition and composition of numbers within 10, experience the inclusion relationship between total number and part number, and the complementary relationship and exchange relationship between part number and part number
significant: 45 people
not significant: 3 people
3, Help children understand the meaning of addition and subtraction, master the calculation skills of addition and subtraction within 10, and experience the inverse relationship between addition and subtraction
significant: 40 people
not significant: 8 people
4. Be able to listen to the rules of some operation activities, carry out activities according to the rules, check the process and results of activities according to the rules, and tell the process and results of operation activities clearly. And can participate in more group activities
significant: 26 people
not significant: 22 people
5. With the help of teachers, they can summarize relevant mathematical experience, learn to observe and think about problems from different angles and aspects, and solve simple mathematical problems through observation, comparison, analogy and transfer<
significant: 18 people
not significant: 30 people
6. Learn to put and organize activity materials in an orderly way<
significant: 44 people
not significant: 4 people
7. They can play math games friendly with their peers and negotiate with their peers by taking turns, waiting appropriately and negotiating
significant: 10
not significant: 38
mathematics does not have an external reality, but a kind of relationship, a kind of knowledge of logical thinking, which shows some abstraction. Children live in the real world and have some experience of various things and phenomena in real life. On the other hand, children's thinking is still in the stage of concrete image thinking, They lack the basic concept of understanding the abstract relationship of things. Children in our class mainly rely on memory and proficiency to carry out calculation activities, which lack flexibility; In the process of observation, most of the children are not able to operate actively and are not interested in the experimental results<
2. Research objects:
48 children in class 2 of Da Da Da class
3. Experimental time:
March 2004 - July 2004
4. Experimental objectives:
1. Guide children to develop the habit of exploring surrounding things, thinking, asking questions, and actively answering questions, and be careful and attentive in the process of observation, And express their views with an objective attitude
2. In daily life or games, guide children to observe carefully and attentively, observe from different angles or continuously observe an object for a period of time, find out the reasons for the change of things, and learn simple reasoning
3. Guide children to classify and learn objects from different angles in games and daily life, and classify objects according to two dimensions at the same time. They have preliminary generalization ability< 5. Experimental steps:
(1) observation record form of children's basic situation in this class
ecational goal
reaching the standard
1. Learning ordinal number, odd and even number, adjacent number and other knowledge within 10, learning following number and inverted number<
significant: 38 people
not significant: 10 people
2. Learn the decomposition and composition of numbers within 10, experience the inclusion relationship between total number and part number, and the complementary relationship and exchange relationship between part number and part number
significant: 45 people
not significant: 3 people
3, Help children understand the meaning of addition and subtraction, master the calculation skills of addition and subtraction within 10, and experience the inverse relationship between addition and subtraction
significant: 40 people
not significant: 8 people
4. Be able to listen to the rules of some operation activities, carry out activities according to the rules, check the process and results of activities according to the rules, and tell the process and results of operation activities clearly. And can participate in more group activities
significant: 26 people
not significant: 22 people
5. With the help of teachers, they can summarize relevant mathematical experience, learn to observe and think about problems from different angles and aspects, and solve simple mathematical problems through observation, comparison, analogy and transfer<
significant: 18 people
not significant: 30 people
6. Learn to put and organize activity materials in an orderly way<
significant: 44 people
not significant: 4 people
7. They can play math games friendly with their peers and negotiate with their peers by taking turns, waiting appropriately and negotiating
significant: 10
not significant: 38
10. (1) Computing speed is an important index to measure the performance of computer< (2) word length< (3) the capacity of internal storage< (4) the capacity of external memory.
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