World computing power

1. There is no way to estimate the total computing power of computers all over the world, because everyone's computers, including CPUs, graphics cards and memory, are different. To calculate the total computing power of the world, I don't think anyone can do it.

3. You mean bitcoin?

4.

In order to enter the artificial intelligence instry, we must first have a certain mathematical foundation, because artificial intelligence is different from app development, web development, game development and other traditional internet jobs. We can check the API call function or beautify the interface every day

Artificial intelligence is evolved from "approximation theory" in mathematics. At the beginning, most of the methods used in artificial intelligence are used by mathematicians to approximate some nonlinear functions which are difficult to express. Later, with the improvement of computer performance, computer workers and statisticians began to try to use this set of "approximation theory" to solve some classification problems. Graally developed into the current situation of artificial intelligence

2. At the beginning of the development of artificial intelligence instry, there are few API functions available, so it is necessary to write your own algorithm. For the engineers who want to master the knowledge of artificial intelligence, mathematics is an unavoidable obstacle

Artificial intelligence is a big concept. Nowadays, the so-called AI applications of many companies are still in the primary stage, such as information (data) classification, filtering, pattern recognition and so on. Many languages have formed code packages, open source code and so on, More is the need for the support of big data, constantly optimize the algorithm

4. Now some popular intelligent devices, smart home, I don't think it is artificial intelligence, but more is the application of various sensors and program rules. Maybe this kind of instry will be closer to life and more market. The prospect is very promising. However, just like making software, it's not sure that a good software proct can be made with good technology. It's necessary to have a deep understanding of user needs and pay attention to user experience. In your background, I think it may be better to develop in this direction

5. Because Chinese people think mathematics is arithmetic. So far, China has not made any achievements in mathematics

6. It's not as the title says,
in short,
quantum computer is to replace the original ordinary bits with quantum bits
from the physical level, quantum computers are not based on ordinary transistors, but use spin direction controlled particles (such as proton nuclear magnetic resonance) or polarization direction controlled photons (mostly used in school experiments) as carriers. Of course, in theory, any multi-level system can be used as the carrier of qubits
from the perspective of calculation principle, the input state of quantum computer can be either discrete eigenstate (like traditional computer) or superposition state (probability superposition of several different states). The operation of information is extended from traditional logic operations such as "and", "or", "and" to any unitary transformation, and the output can also be superposition state or an eigenstate. So quantum computer will be more flexible and can realize parallel computing< If you want to explain the details, it's a bit troublesome. I'll give you some key words to look up:
1. Quantum state
2. Quantum superposition
3, qubit
4, unitary transformation
5, quantum logic
6, quantum gate (corresponding to traditional logic gate, In fact, it is some special positive transformation)
7, quantum algorithm, quantum algorithm (of course, quantum computer can also realize the traditional algorithm)
8, and then on how to realize from the physical level, it is best to start with quantum optics, because polarized photons are the simplest
in depth:
ordinary digital computers run on binary systems of 0 and 1, which are called "bits". But quantum computers are far more powerful. They can operate on qubits and can compute values between 0 and 1. Suppose an atom placed in a magnetic field rotates like a top, so its axis of rotation can point up or down. Common sense tells us that the rotation of atoms can be up or down, but not all at the same time. But in the strange world of quantum, the atom is described as the sum of two states, an upward turning atom and a downward turning atom. In the wonderful world of quantum, every object is described by the sum of all the incredible states
imagine a string of atoms arranged in a magnetic field and rotating in the same way. If a laser beam is shining on the top of the atoms, it will jump down the group of atoms and quickly flip the rotation axis of some atoms. By measuring the difference between the incoming and outgoing laser beams, we have completed a complex quantum "calculation", involving a lot of rapid spin movement
from the perspective of mathematical abstraction, quantum computer performs the calculation with set as the basic operation unit, while ordinary computer performs the calculation with element as the basic operation unit (if there is only one element in the set, quantum calculation is no different from classical calculation)
take the function y = f (x), X ∈ a as an example. The input parameter of quantum computation is the domain a, and the output domain B is obtained in one step, that is, B = f (a); The input parameter of classical calculation is x, and the output value y is obtained. The range B can only be obtained by multiple calculations, that is, y = f (x), X ∈ a, y ∈ B
quantum computer has a problem to be solved, that is, the output range B can only randomly take out a valid value y. Although the number of elements in output set B is much less than that in input set a by directing the unwanted output to an empty set, it still needs to be calculated many times when all the valid values need to be taken out.

7. Maybe this dinosaur with money is not a reliable platform! It's just for the publicity effect, so if you don't get the money, you'll be cheated.

8. Dalian University of technology, if you want to further study, then go to Dalian University of technology, if not to Tsinghua!

9. Topic selection is of primary importance in academic paper writing. This is because only by studying meaningful topics can we
achieve good results and benefit the scientific cause and real life; A meaningless research, no matter how well it is studied or how beautifully it is written, is of no scientific value. Professor Qian Xuesen said: "research projects should be closely combined with the needs of the country In terms of research methods, we should prevent us from getting into trouble and engaging in trivial philosophy. At present, in the Social Sciences, some people make a lot of research on a sentence of the ancients and write a large paper. I don't think it's meaningful. " Therefore, we should choose subjects with scientific value for research and writing
then, what principles should be used to select topics?

10. NEC's "world Simulator" is the fastest computer in the world, with 20 trillion times per second.