It computing power
Publish: 2021-03-25 23:10:56
1. It's very high. I've worked in the same instry
2. 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
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
3.
which is the best choice for computing power service
are you asking about the Bank of computing power
since the tenth power bank was proposed, it has attracted the attention of many people in the instry, and there are more and more related topics. So what do we think of the bank
to sum up, computing power bank is a sharing platform of hardware platform leasing + professional software application, which is based on P2P network. Through this platform, we can carry out in-depth cooperation in instry applications, customize professional computing power solutions, and create a new computing power output mode
4. If you want to trade this computing power, you can trade it online. You can trade it on their app
5. 1. These two are helpful for learning it. It depends on how much you want to learn. The deeper you learn, the more useful these two are. Learning simple math / English has no influence< It also includes many parts, such as software / hardware / e-commerce, etc.
3; Programming is to use some simple English words, which is not very difficult
4. When you go abroad to study or learn English textbooks, you have high requirements for English, but generally not high requirements.
3; Programming is to use some simple English words, which is not very difficult
4. When you go abroad to study or learn English textbooks, you have high requirements for English, but generally not high requirements.
6. I bought very high ones,
7. The strength of the company is very big, not bad
8. It is the increase, use and delivery mode of related services based on the Internet, which usually involves providing dynamic, scalable and often virtualized resources through the Internet
cloud is a metaphor of the Internet. In the past, cloud was often used to represent telecom network, and later it was also used to represent the abstraction of Internet and underlying infrastructure. In a narrow sense, cloud computing refers to the delivery and use mode of IT infrastructure, which means to obtain the required resources on demand and easy to expand through the network; Guangyi cloud computing refers to the delivery and use mode of services, which means to obtain the required services on demand and easy to expand through the network. This kind of service can be it and Internet related, but also other services. It means that computing power can also be circulated through the Internet as a commodity
by distributing computing on a large number of distributed computers instead of local computers or remote servers, the operation of data center will be more similar to that of Internet. This makes it possible to switch resources to the required applications and access computers and storage systems as required. It's like changing from the old single generator mode to the centralized power supply mode of power plant. It means that computing power can also be circulated as a commodity, just like gas, water and electricity, which is easy to use and low-cost. The biggest difference is that it is transmitted through the Internet. Cloud computing is often confused with grid computing, utility computing and autonomic computing
Grid Computing: a kind of distributed computing, a super virtual computer composed of a group of loosely coupled computers, which is often used to perform some large tasks; Utility calculation: a kind of packaging and charging method of IT resources, such as calculating and storing separately, just like the traditional public facilities such as electric power; Autonomic computing: a computer system with self-management function. In fact, many cloud computing deployment rely on computer clusters (but they are quite different from the composition, architecture, purpose and working mode of grid), and also absorb the characteristics of autonomic computing and utility computing
cloud computing can be considered to include the following levels of services: infrastructure as a service (IAAs), as a service (PAAS) and as a service (SaaS)
IAAs: infrastructure as a service
IAAs (infrastructure-as-a-service): infrastructure as a service. Consumers can get services from perfect computer infrastructure through Internet. IAAs money path
PAAS: as a service
PAAS (platform-as-a-service): as a service. PAAS actually refers to the development of services as a SaaS model submitted to users. Therefore, PAAS is also an application of SaaS mode. However, the emergence of PAAS accelerates the development of SaaS, especially the development of SaaS applications
SaaS: as a service
SaaS (software-as-a-service): as a service. It is a mode provided through Internet, users do not need to buy, but rent web-based services from providers to manage business activities. Edit this paragraph with cloud Internet of things
"the Internet of things is the Internet of things". This has two meanings: first, the core and foundation of the Internet of things is still the Internet, which is an extended network based on the Internet; Second, its client extends to any item to exchange information and communicate with each other. Two business models of Internet of things:
1. Mai (m2ma application integration), internal Maas
2. Maas (m2mas service), MMO, multi tenants (multi tenant model)
with the increase of business volume of Internet of things, the demand for data storage and computing will bring the demand for "cloud computing" capability:
1. Cloud Computing: from computing center to data center, in the initial stage of Internet of things, pop can meet the demand;
cloud is a metaphor of the Internet. In the past, cloud was often used to represent telecom network, and later it was also used to represent the abstraction of Internet and underlying infrastructure. In a narrow sense, cloud computing refers to the delivery and use mode of IT infrastructure, which means to obtain the required resources on demand and easy to expand through the network; Guangyi cloud computing refers to the delivery and use mode of services, which means to obtain the required services on demand and easy to expand through the network. This kind of service can be it and Internet related, but also other services. It means that computing power can also be circulated through the Internet as a commodity
by distributing computing on a large number of distributed computers instead of local computers or remote servers, the operation of data center will be more similar to that of Internet. This makes it possible to switch resources to the required applications and access computers and storage systems as required. It's like changing from the old single generator mode to the centralized power supply mode of power plant. It means that computing power can also be circulated as a commodity, just like gas, water and electricity, which is easy to use and low-cost. The biggest difference is that it is transmitted through the Internet. Cloud computing is often confused with grid computing, utility computing and autonomic computing
Grid Computing: a kind of distributed computing, a super virtual computer composed of a group of loosely coupled computers, which is often used to perform some large tasks; Utility calculation: a kind of packaging and charging method of IT resources, such as calculating and storing separately, just like the traditional public facilities such as electric power; Autonomic computing: a computer system with self-management function. In fact, many cloud computing deployment rely on computer clusters (but they are quite different from the composition, architecture, purpose and working mode of grid), and also absorb the characteristics of autonomic computing and utility computing
cloud computing can be considered to include the following levels of services: infrastructure as a service (IAAs), as a service (PAAS) and as a service (SaaS)
IAAs: infrastructure as a service
IAAs (infrastructure-as-a-service): infrastructure as a service. Consumers can get services from perfect computer infrastructure through Internet. IAAs money path
PAAS: as a service
PAAS (platform-as-a-service): as a service. PAAS actually refers to the development of services as a SaaS model submitted to users. Therefore, PAAS is also an application of SaaS mode. However, the emergence of PAAS accelerates the development of SaaS, especially the development of SaaS applications
SaaS: as a service
SaaS (software-as-a-service): as a service. It is a mode provided through Internet, users do not need to buy, but rent web-based services from providers to manage business activities. Edit this paragraph with cloud Internet of things
"the Internet of things is the Internet of things". This has two meanings: first, the core and foundation of the Internet of things is still the Internet, which is an extended network based on the Internet; Second, its client extends to any item to exchange information and communicate with each other. Two business models of Internet of things:
1. Mai (m2ma application integration), internal Maas
2. Maas (m2mas service), MMO, multi tenants (multi tenant model)
with the increase of business volume of Internet of things, the demand for data storage and computing will bring the demand for "cloud computing" capability:
1. Cloud Computing: from computing center to data center, in the initial stage of Internet of things, pop can meet the demand;
9. Of course, it's against the law. You are knowingly guilty. The technical directors of many companies have to go in
10. 1. Students generally feel that the accuracy of calculation will decline after they are separated from the scientific calculator
the inaccuracy of operation is largely e to the lack of deep understanding of basic concepts, the lack of thorough grasp of basic formulas and rules, and the lack of proficiency in their application. Therefore, in teaching, teachers should consciously and systematically equip some exercises without using calculators. When students are proficient in the application of concepts, formulas and rules, and their accuracy is guaranteed, they may as well use calculators again. The calculator as a learning aid, so as to liberate students from the operation, into the study of other problems
2. The effect of using calculator on flexibility
calculation should be reasonable, simple, skilled and fast, which requires students to be flexible in calculation and quick in thinking. The improvement of this ability requires students to observe and think about problems from many aspects, angles and directions. The scientific calculator can quickly solve the complicated calculation, if students blindly use the calculator, they will simply and mechanically input the data to solve, without thinking about how to solve the problem quickly and concisely. The lack of training in this area means that we have lost the effective way to improve our computing ability. I think we can have a class (or several classes) of using calculators to solve problems after a certain part of the content is finished. Before that, calculators are not allowed to be used. For example, in the seventh grade, some students use calculators to solve problems after adding rational numbers, and some use calculators after subtraction. It's better to finish the basic course, and then have calculators after students practice. Or, when encountering this kind of problem, such as calculating 18.75-15.39 + 1.25-14.61, students are required to solve it in a simple way, so as to consciously help students to calculate flexibly, reasonably and simply
3. The impact of using calculator on strictness
when using calculator, the calculation process is generally omitted. However, whether it is the usual requirements or the examination, the problem-solving process is required to be complete and standardized. In fact, this is the embodiment of the thinking process. Due to the lack of training in the use of calculators, the students' problem-solving is not standardized and complete, which is a serious defect and is very unfavorable to the improvement of students' mathematical thinking and mathematical quality
4. The influence of using calculator on mathematical thinking and psychological quality
operation plays a significant role in cultivating students' scientific way of thinking and forming good thinking habits and psychological quality. If students use scientific calculators excessively, they will be unwilling to spend time thinking and doing standard calculations, so as to engage in them rashly. As time goes by, thinking is not orderly and chaotic, and calculation is graally unfamiliar. In addition, we have formed the bad habit of carelessness and carelessness, and lack the training of will and perseverance. At the same time, some students are only used to one-way, single-level operation, used to forward calculation, not used to multi-directional, multi-level operation, not used to reverse operation. Without the scientific calculator, students have to pay attention to the direction and skills of calculation, so as to form the habit of looking ahead and looking after the whole situation. Through long-term training, students' mathematical thinking ability and confidence and perseverance are improved
the tradition of Chinese ecation attaches importance to the training of basic skills. Chinese students often have a solid foundation, and some American College Students' computing ability is not as good as Chinese middle school students. However, the advantage of basic skills of computing ability is less and less obvious for high school students nowadays. A senior high school mathematics teacher said: "many colleagues have such a feeling. Now, as soon as they go to senior one, they have to make up for the calculation for the students. Teachers and students feel that it's hard." A high school student's parents said: "because calculators can be used in the high school entrance examination, but they are not allowed in the college entrance examination, so my son should give up calculators first after he goes to high school. Because of his long-term dependence on calculators, his son doubted his ability of oral and written calculation, and was not at ease with the results of calculation. It's a waste of time. After more than a year, I finally gave up the calculator. " This kind of phenomenon is also the place that I feel puzzled. Why can I use calculator in senior high school entrance examination, but not in college entrance examination? How can students adapt to this change as soon as possible< In a word, with the rapid development of science and technology in the information society, the use of computers and scientific calculators is becoming more and more popular. How can we turn a blind eye to middle school mathematics? Can the field of mathematics ecation sit still? The use of calculators is no longer an economic problem, but an inevitable result of social progress and scientific and technological development. But the use of calculators also weakens the students' computing ability and affects the improvement of students' mathematical quality. We must guide students to use calculators reasonably. On the one hand, we should ensure the improvement of calculation ability, on the other hand, we should be able to operate calculators skillfully.
the inaccuracy of operation is largely e to the lack of deep understanding of basic concepts, the lack of thorough grasp of basic formulas and rules, and the lack of proficiency in their application. Therefore, in teaching, teachers should consciously and systematically equip some exercises without using calculators. When students are proficient in the application of concepts, formulas and rules, and their accuracy is guaranteed, they may as well use calculators again. The calculator as a learning aid, so as to liberate students from the operation, into the study of other problems
2. The effect of using calculator on flexibility
calculation should be reasonable, simple, skilled and fast, which requires students to be flexible in calculation and quick in thinking. The improvement of this ability requires students to observe and think about problems from many aspects, angles and directions. The scientific calculator can quickly solve the complicated calculation, if students blindly use the calculator, they will simply and mechanically input the data to solve, without thinking about how to solve the problem quickly and concisely. The lack of training in this area means that we have lost the effective way to improve our computing ability. I think we can have a class (or several classes) of using calculators to solve problems after a certain part of the content is finished. Before that, calculators are not allowed to be used. For example, in the seventh grade, some students use calculators to solve problems after adding rational numbers, and some use calculators after subtraction. It's better to finish the basic course, and then have calculators after students practice. Or, when encountering this kind of problem, such as calculating 18.75-15.39 + 1.25-14.61, students are required to solve it in a simple way, so as to consciously help students to calculate flexibly, reasonably and simply
3. The impact of using calculator on strictness
when using calculator, the calculation process is generally omitted. However, whether it is the usual requirements or the examination, the problem-solving process is required to be complete and standardized. In fact, this is the embodiment of the thinking process. Due to the lack of training in the use of calculators, the students' problem-solving is not standardized and complete, which is a serious defect and is very unfavorable to the improvement of students' mathematical thinking and mathematical quality
4. The influence of using calculator on mathematical thinking and psychological quality
operation plays a significant role in cultivating students' scientific way of thinking and forming good thinking habits and psychological quality. If students use scientific calculators excessively, they will be unwilling to spend time thinking and doing standard calculations, so as to engage in them rashly. As time goes by, thinking is not orderly and chaotic, and calculation is graally unfamiliar. In addition, we have formed the bad habit of carelessness and carelessness, and lack the training of will and perseverance. At the same time, some students are only used to one-way, single-level operation, used to forward calculation, not used to multi-directional, multi-level operation, not used to reverse operation. Without the scientific calculator, students have to pay attention to the direction and skills of calculation, so as to form the habit of looking ahead and looking after the whole situation. Through long-term training, students' mathematical thinking ability and confidence and perseverance are improved
the tradition of Chinese ecation attaches importance to the training of basic skills. Chinese students often have a solid foundation, and some American College Students' computing ability is not as good as Chinese middle school students. However, the advantage of basic skills of computing ability is less and less obvious for high school students nowadays. A senior high school mathematics teacher said: "many colleagues have such a feeling. Now, as soon as they go to senior one, they have to make up for the calculation for the students. Teachers and students feel that it's hard." A high school student's parents said: "because calculators can be used in the high school entrance examination, but they are not allowed in the college entrance examination, so my son should give up calculators first after he goes to high school. Because of his long-term dependence on calculators, his son doubted his ability of oral and written calculation, and was not at ease with the results of calculation. It's a waste of time. After more than a year, I finally gave up the calculator. " This kind of phenomenon is also the place that I feel puzzled. Why can I use calculator in senior high school entrance examination, but not in college entrance examination? How can students adapt to this change as soon as possible< In a word, with the rapid development of science and technology in the information society, the use of computers and scientific calculators is becoming more and more popular. How can we turn a blind eye to middle school mathematics? Can the field of mathematics ecation sit still? The use of calculators is no longer an economic problem, but an inevitable result of social progress and scientific and technological development. But the use of calculators also weakens the students' computing ability and affects the improvement of students' mathematical quality. We must guide students to use calculators reasonably. On the one hand, we should ensure the improvement of calculation ability, on the other hand, we should be able to operate calculators skillfully.
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