200 computing power
200:15 = 170: x
x = 12.75 yuan
data sources: the following information comes from enterprise credit reference institutions, more detailed enterprise risk data, company official website, company profile, which can be inquired on nailing enterprise dictionary, and more company recruitment information can be inquired on the company official website< br />
• Company profile:
Shenzhen Lianrong Technology Co., Ltd. was established on July 6, 2017, with registered capital of 0.7 and legal representative of Li Weiping. Its address is 14 / F, Minsheng financial building, Haitian Road, Lianhua Street, Futian District, Shenzhen. Its unified social credit code and tax number are 91440300ma5elwky67 and its instry is information technology consulting service, The registration authority is Shenzhen market supervision and Administration Bureau, and its business scope is licensed business items: design and sales of computer network equipment, communication equipment and electronic procts; Database and computer network services; The development and application of blockchain technology; Supply chain management and related supporting services; Accept the entrustment of enterprises to engage in information and technical services; Enterprise management consulting; Domestic trade; Import and export business Items prohibited by laws and administrative regulations are excluded; The business registration number of Shenzhen Lianrong Technology Co., Ltd. is 440300201734294; Branches:
, 8226; Foreign investment:
,
, 8226; Shareholders:
&; Senior executives:
1. Supercomputers:
usually refers to the computer composed of hundreds, thousands or even more processors, which can calculate large and complex tasks that ordinary PC and server cannot complete. Supercomputer is a kind of computer with the strongest function, the fastest computing speed and the largest storage capacity. It is an important symbol of the national scientific and technological development level and comprehensive national strength
2. Server:
refers to some high-performance computers, which can provide services through the network. Compared with ordinary computer, the stability, security, performance and other aspects are higher, so the CPU, chipset, memory, disk system, network and other hardware are different from ordinary computer
the server is the node of the network, which stores and processes 80% of the data and information on the network, and plays an important role in the network. They are high-performance computers that provide various services for client computers. Their high performance mainly includes high-speed computing power, long-time reliable operation, strong external data throughput and so on
3. Desktop:
is a kind of independent and separate computer, which has no connection with other parts. Compared with notebook and netbook, the volume is larger, and the host, display and other devices are generally relatively independent, and generally need to be placed on the computer desk or special workbench. So it's called desktop
as a very popular microcomputer, most of the machines used in homes and companies are desktop computers. The performance of desktop is better than that of laptop
4. Embedded system:
that is, embedded systems
, is an application-oriented, microprocessor-based, software and hardware tailorable special-purpose computer system, which adapts to the application system's strict requirements on function, reliability, cost, volume, power consumption, etc. It is generally composed of embedded microprocessor, peripheral hardware, embedded operating system and user's application program
extended data
computer microprocessor (CPU) takes transistor as the basic component. With the continuous improvement of processor and the acceleration of update speed, computer structure and components will also change greatly. With the development of photoelectric technology, quantum technology and biotechnology, it has a great role in promoting the development of new computers
Since 1980s, ALU and control unit (CPU) have been integrated into one integrated circuit, which is called microprocessorthe working mode of this kind of computer is very intuitive: in a clock cycle, the computer first obtains instructions and data from memory, then executes instructions, stores data, and then obtains the next instruction
this process is repeated until a termination instruction is obtained. Explained by the controller, the instruction set executed by the arithmetic unit is a well-defined and very limited set of simple instructions
The traditional computer processing information is mainly characters and numbers. In fact, people are more used to pictures, words, sounds, images and other forms of multimedia information. Multimedia technology can integrate graphics, images, audio, video and text, making the object and content of information processing closer to the real world< br />ordinary users do not need to care about the computing power of the graphics card, only GPU programmers care about this problem when they write CUDA programs to develop GPU computing. As long as you know the model of your computer's graphics card, you can find the corresponding computing power https://developer.nvidia.com/cuda-gpus .
first, oral arithmetic - strengthen the foundation of computing ability
oral arithmetic is a kind of ability that students must master, it is the basis of improving students' comprehensive computing ability. The teacher must be clear about the oral arithmetic skills that students should master in each learning period, and must let each child pass the test, otherwise he will fall behind in the future mathematics study
in the first grade, students must master the division within 10 and the addition and subtraction within 20, which is the most basic knowledge reserve. And then there is the nine nine multiplication formula table, all of which need to be memorized. In the third grade, we have some advanced math teachers who ask children to recite "19 × But all Korean pupils have to recite the "19" formula × Yotaro Fukuda of Japan said that the essence of intuition lies in recitation and mental calculation, and he has proposed reciting "29" × 29. And 25, for example × 4=100，125 × 8=1000，50 × 2，37 × 3 = 111, etc. In the fourth grade, I learned the decimal, which is also expanded in the above relationship, such as 0.125 × 8=1, 1.25 × 8 = 10, etc., 3.14 in the fifth grade × 2=,3.14 × 3=,3.14 × 4=,3.14 × 52=,3.14 × 6 =, and so on, children must learn to transform, draw inferences from one instance, practice makes perfect, because this is the basis of learning other mathematical knowledge< Second, calculation theory is the propeller to improve the ability of calculation.
a third grade teacher showed two such calculation problems on the blackboard when explaining three digits multiplied by two digits. The teaching fragments are as follows: ① ② teacher: what do 117 here mean (students compare, discuss.)< Students: 117 tens< Teacher: can you fill in 0 here< Student: Yes
(let students understand 13 × 9, its true meaning is 13 × 90, and it is clear that the numerical value is determined by the digit of the number.)< Teacher: now let's look at question 2. What do you find< Student: it's wrong< Students: from 213 tens to 213 ones
teacher: can you use the method of estimation to check
Student: 213 is equivalent to 200213 × 15 is equivalent to 200 × 15, it should be 3000, but 1278 is too far away
teacher: it's amazing that I can use my computing skills comprehensively
when teaching the volume of a cone in grade five, I divided the students into groups according to the experiment of science class, and each group determined a group leader, who was responsible for the division of labor, so that the students could truly experience the relationship between the volume of a cylinder and the volume of a cone. I remember an ecationist said: "I've seen it, I've forgotten it; I heard it, I can't remember it clearly; I did it, and I remember it. " It's more useful for students to understand arithmetic by hands than to do 100 questions< Third, game is the best teacher to improve computing ability. Teachers should consider how to mobilize students' enthusiasm and explore the motivation of learning. The nature of students is playful, teachers put knowledge into the game, I believe students will be more efficient in learning, enthusiasm will be stronger. For example, in order to cultivate children's understanding of the division of numbers within 10, the game of "find friends" is created: find out which two numbers are good friends in the following numbers, 496812, and the children will quickly find out and quietly master the "ten ways". Students will find out 182 and 118, 49 and 51. They are good friends respectively. Students are quietly using the "method of collecting 100", and 0.25 and 0.4, calculating 1.25 × At 16:00, I found 1.25 good friend 8 hidden in 16, so 1.25 × 16=1.25 × eight × 2
mathematics makes people smarter. As a mathematics teacher, you can't only teach the knowledge in textbooks all your life. Can you show off occasionally. When two digits are multiplied by two digits, ten digits are the same, and the sum of two digits is ten, then their proct is: multiply the mathematics of ten digits by the number and add 1 to get a new number, and then multiply the new number by 100; Multiply the two numbers on the digit and add them to the number obtained in the previous step. For example, 34 × 36, calculation 3 × 3 + 1) to get 12, and then multiply by 100 to get 1200; Calculation 4 × 6 gives 24, 24 plus 1200 gives 1224. It may seem unreliable, but doing so can really get the right answer. I believe that the students will look at you with new eyes, even to the ground. Or do a Sudoku problem with the students, teachers, we have to keep learning< In the teaching goal of number and algebra in primary school, mathematics curriculum standard says: we should pay attention to oral calculation, strengthen estimation and encourage algorithm diversification. Estimation is a kind of ability to approximate or precisely estimate the operation process or result. It is seldom used in classroom teaching, but it is especially useful in life
mathematics comes from life and serves life, so it has both mathematics flavor and life flavor. If children only do math exercises, it will suppress the enthusiasm of students. When teaching the knowledge of estimation, I created a situation of organizing students' spring outing and said to the children, "there are 52 students in my class, and there are 25 minibuses. How many cars do we want to rent?" The students began to discuss with each other, and said in their whole life: two cars are enough, 52 is equivalent to 50, 25 people in one car, just two cars. There was a crusade immediately. There were 25 people in one car, 50 people in two cars, and the remaining two people were running? The knowledge of estimation is used here“ Students, if we are going to have a picnic, how can we divide it up? " Here we use the knowledge of factors
when explaining the knowledge of four decimal operations, my homework assignment is to collect a shopping ticket, extract mathematical problems from it and solve them. The students' interest is also very high, and they get the support of their parents. At the parents' meeting, I specially asked parents to give full play to their children's role in mathematics
when South Korean mothers go shopping, they always bring with them the "19" they have already memorized × 19 "formula of the children go together, saying that" the price can be calculated immediately, very convenient. ". When all the people around the student are willing to accept his mathematical ability, what is his inner feeling? It's very useful to learn mathematics< 5. Habit, the stabilizer of developing mathematical ability
ecation is the habit of cultivating people. Our mathematical thinking ability benefits from the cultivation of our youth. In teaching, most teachers can pay attention to: the right questions, calculate the logarithm, decimal addition and subtraction to align the digits, and check carefully after finishing. In my opinion, the more important is:
1. Let the students' checking calculation write next to the problem solving, so that we can find the students' problem solving process, find the existing problems, don't put the hope on the inspection, the children have no patience to carefully check after finishing the problem quickly. So the key is to find out his weakness in the process of solving the problem
2. Mistakes are accumulating. Knowledge lies in accumulation, and belief also includes wrong topics. For each test or assignment, ask students to the wrong questions in the wrong book, analyze the reasons, and do it again a week later
3. The roll surface should be clean. Writing carefully shows that students can analyze and think calmly, and the probability of errors is small. The long feifeng paper shows that students lack of deep thinking in problem-solving, and their learning attitude is not serious, and their grades are certainly not ideal.