Computing power of integer operation
Publish: 2021-05-12 21:06:23
1. 1、 Basic training:
from the psychological characteristics of different ages of primary school students, the basic requirements of oral arithmetic are 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. In primary school, this training is a sublimation training of abstract thinking of numbers. It is very beneficial to promote the development of thinking and intelligence
Second, targeted training: the main form of the number of senior primary school students has changed from integer to score. In the operation of numbers, the addition of different denominators is the most time-consuming and error prone place for students, and it is also the key and difficult point of teaching and learning
two fractions, the large number in the denominator is the multiple of the decimal. For example, "1 / 12 + 1 / 3", in this case, oral calculation 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, and the denominator is expanded by several times until it is the multiple of another denominator decimal< Third, memory training
the content of senior calculation is extensive, comprehensive and comprehensive. Some common operations are often encountered in real life. Some of these operations have no specific rules of oral arithmetic and must be solved by strengthening memory training. The main contents are as follows:
1
2. The proct of the approximate value of PI 3.14 with one digit and the proct 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 of these fractions and decimals.
from the psychological characteristics of different ages of primary school students, the basic requirements of oral arithmetic are 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. In primary school, this training is a sublimation training of abstract thinking of numbers. It is very beneficial to promote the development of thinking and intelligence
Second, targeted training: the main form of the number of senior primary school students has changed from integer to score. In the operation of numbers, the addition of different denominators is the most time-consuming and error prone place for students, and it is also the key and difficult point of teaching and learning
two fractions, the large number in the denominator is the multiple of the decimal. For example, "1 / 12 + 1 / 3", in this case, oral calculation 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, and the denominator is expanded by several times until it is the multiple of another denominator decimal< Third, memory training
the content of senior calculation is extensive, comprehensive and comprehensive. Some common operations are often encountered in real life. Some of these operations have no specific rules of oral arithmetic and must be solved by strengthening memory training. The main contents are as follows:
1
2. The proct of the approximate value of PI 3.14 with one digit and the proct 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 of these fractions and decimals.
2. Both operations are processing operations
in the beginning, there was no floating-point unit in the CPU, only the integral point unit. At that time, the machine could only handle the integral point operation easily, but if you want to calculate the floating-point operation, you need the program (software) on the computer to calculate, and the hardware of the computer can't handle it. Or you can buy a floating-point unit from the market and plug it into your host computer as a peripheral to supplement the CPU itself
at that time, the reason why floating-point arithmetic was not integrated in CPU was e to the influence of price and technology. Now, with the development of technology, the price of chip is getting cheaper and cheaper, floating point and integral point have been integrated in the CPU. And their computing speed is faster and faster, and the function of processing data is more powerful
I just heard it from the teacher in class, and I hope there is a real in-depth understanding of the supplement.
in the beginning, there was no floating-point unit in the CPU, only the integral point unit. At that time, the machine could only handle the integral point operation easily, but if you want to calculate the floating-point operation, you need the program (software) on the computer to calculate, and the hardware of the computer can't handle it. Or you can buy a floating-point unit from the market and plug it into your host computer as a peripheral to supplement the CPU itself
at that time, the reason why floating-point arithmetic was not integrated in CPU was e to the influence of price and technology. Now, with the development of technology, the price of chip is getting cheaper and cheaper, floating point and integral point have been integrated in the CPU. And their computing speed is faster and faster, and the function of processing data is more powerful
I just heard it from the teacher in class, and I hope there is a real in-depth understanding of the supplement.
3. Jianxing ruisu T9 series has four different capacities: 128G, 256g, 512g and 1TB.
4. Using super
pi software to measure the performance of single core (recommended high frequency IU)
i5
3570k (frequency doubling without locking with k-meter)
i5
4670k
i7
3770k
the next is the non over frequency scheme:
http://www.cpubenchmark.net/singleThread.html
E3
1280v3 or E3
1290v2
I3
3245
i7
3820 (domestic virtual high)
ask, Are you using only one or more? Is it a single machine, or a metered one
in fact, GPU is better
from Dahua, Shanghai.
pi software to measure the performance of single core (recommended high frequency IU)
i5
3570k (frequency doubling without locking with k-meter)
i5
4670k
i7
3770k
the next is the non over frequency scheme:
http://www.cpubenchmark.net/singleThread.html
E3
1280v3 or E3
1290v2
I3
3245
i7
3820 (domestic virtual high)
ask, Are you using only one or more? Is it a single machine, or a metered one
in fact, GPU is better
from Dahua, Shanghai.
5. -- |
the processing of the operating system
the floating-point operation ability is reflected in the processing of graphics
the GPU of the graphics card is floating-point operation
the processing of the operating system
the floating-point operation ability is reflected in the processing of graphics
the GPU of the graphics card is floating-point operation
6. Primary school mathematics is now relatively simple, just need to reach the decimal, fraction, integer, percentage of the conventional calculation can be enough. The more difficult part is the division of decimals, which requires children to be able to convert to integers first.
7. You can go to the server manufacturer (Zhengrui) to see the relevant procts on the Internet, and refer to this
Proct Model: zi2ts5-18998hkv
Proct Type: al 18 core tower server
processor: Xeon e5-2699
v3 × 2
memory: 32g DDR4 reg ECC
hard disk: SSD pcie800g
Proct address; http://www.zrway.com/server/proct_ param/1024/10915.html
Proct Model: zi2ts5-18998hkv
Proct Type: al 18 core tower server
processor: Xeon e5-2699
v3 × 2
memory: 32g DDR4 reg ECC
hard disk: SSD pcie800g
Proct address; http://www.zrway.com/server/proct_ param/1024/10915.html
8.
Bit operations can only be integer or character type, character type is actually single byte integer
includes the following operators:
bitwise AND & amp;, Bitwise or |, bitwise XOR ^, shift left & lt& lt;， Move right & gt& gt;
there is another remainder operation:%
a% B means to divide a by B and take the remainder
this is a hard and fast rule of C language. Bit operation is a concept only when positive numbers are expressed in binary system; The remainder operation is to divide integers to get the remainder, and the remainder must also be positive
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