There is a series of numbers as follows: 1.2001.1.2000.1.1999.1998.1.1997.1996.1. What is the number in 1999 Please list the detailed algorithm

There is a series of numbers as follows: 1.2001.1.2000.1.1999.1998.1.1997.1996.1. What is the number in 1999 Please list the detailed algorithm

If your topic is right, the order of the numbers between the two 1s is 1, 1, 2, 2, 3, 3 bar
In this case, according to 2,2 ', 3,3', 4,4 ', 5,5' I'll divide them into groups,
It can guarantee that each group has only one 1, and the first number is 1,
[where the apostrophe (') is only used to distinguish the former group from the latter group],
That is, (12001), (12000), (1199991998), (119971996) ,…
Because of 2 + 2 + 3 + 3 + +31+31=1980=1999-19,
Therefore, the 1999 number should be the 19th number of the previous 32 grouped into 32 and 32 ';
According to the grouping rule, the group with group number 32 is the 61st group,
From the first term to the 1999 term,
There are 1 + 1 + 2 + 2 + 3 + 3 + +30 + 30 + 18 = 1918 + 18 = 1936 numbers that are not 1,
Therefore, the 1999 digit 2001-1936 + 1 = 66
That is 66
It's a bit messy. The idea is OK

Definition: Let f '(x) be the derivative of function y = f (x), and the derivative of function y = f · (x). If f' (x) = 0 has real solution x0, then point (x0, f (x0)) is called function y = f (x)
Now we know that f (x) = x ^ 3-3x + 2x-2, we can find the "inflection point" coordinate a of function f (x)

f(x)=x^3-3x^2+2x-2
f’(x)=3x^2-6x+2
f’‘(x)=6x-6
"Inflection point" coordinates: (1, - 2)

Operation order of macro program expression

Class a macro is input in G65 hxx P # XX Q # XX R # xx or G65 hxx P # XX qxx RXX format. XX means numerical value. It is input in UM level. For example, if you input 100, that is 0.1mm ~ ~. # XX is the variable number. If you don't know what the variable number means, I won't be cured, but still teach

What are the advantages and disadvantages of English and Chinese?
It's better to speak more Chinese~

Don't hold your computer's English Center! Strongly despise it! English is the center of computer, is computer the center of everything?
Here's an authoritative article:
Chinese character -- the greatest character of human being
*A comparison between Chinese and English
The advantage of Chinese characters lies in that Chinese characters are two-dimensional expression, and two-dimensional is the highest efficiency that can be achieved by plane media to express information. In Chinese and English, English letters correspond to the strokes of Chinese characters, a single Chinese character corresponds to English words, and Chinese words correspond to English phrases, Science and engineering students generally master 2000 Chinese characters. With these 2000 characters, you can read books, read newspapers, and engage in scientific research. As long as you have primary school culture, you can understand most articles. If you have junior high school culture, you can understand the use of most products with your scientific knowledge. For example, high-tech computers are demanding, In China, those high school students who can't go to university can operate skillfully after a year and a half of training, and some junior high school students who can't go to high school can do it
The reuse rate of Chinese characters is very high. The total number of Chinese characters accumulated in the past dynasties is tens of thousands. Kangxi dictionary contains more than 40000. Experts point out that there are only 3500 commonly used Chinese characters. Choosing the contemporary commonly used characters as the focus of learning and using Chinese characters is an important content of sorting and teaching Chinese characters in the past dynasties. In history, the Three Character Classic and thousand character text are literacy textbooks compiled with the commonly used characters at that time
And English? For example, because a place name is a word, only a few people can deal with it correctly. English is really a stupid language. Because of its defects in expression, it tries to name everything in the world by one-dimensional linear combination of letters. A thing is a word. The universe is infinite, and English vocabulary is infinite - unfortunately, people's energy is limited!
English is divergent
In the English world, the average American high school graduate has about 3000 to 3500 words, which is enough to meet the needs of daily life. However, if there are no 20000 words, don't want to read newspapers, and if there are no 30000 words, don't want to read weekly smoothly. Professionals 10 years after graduating from university generally understand 80000 words, Computer and so on, but it's very easy to express these in Chinese. It's just "arrow" driven by "fire" and "machine" that can "calculate". But in English, it can't do this, because it's too long. For example, rocket will become "fire-drive-arrow", computer will become "computer-machine", and so on. People's perspective is limited, Too long words will reduce the readability of the article and readers' understanding ability. This is because English letters correspond to the strokes of Chinese characters, a single Chinese character corresponds to English words, and Chinese words correspond to English phrases. The advantages of Chinese in expressing and transmitting information are clear at a glance
At present, the vocabulary of English has exceeded 400000, and it is expected to reach one million by the middle of this century. However, Chinese is relatively stable. Now middle school students with little knowledge of ancient Chinese can read Qu Yuan's songs of Chu. English is difficult, too unstable. Nowadays, it is very difficult for people to read Shakespeare's original works, Not to mention reading the poems of Chaucer, an English poet 400 years ago. Because English is mainly phonetic, it is also known as the most widely distributed language. Because of this, English speakers often misunderstand because of semantic vocabulary and regional habits. Therefore, English is "the most widely misinterpreted language in the world", At present, Britain and the United States are also divided into British and American English. In addition, other so-called English speaking countries, although they all speak English, their spelling and reading differences are no less than the differences between Chinese dialects, and the difficulty of communication is far more than that of using ideographic Chinese
There are very good scholars in all fields of modern science in China. I have never heard of anyone who can't do well in research because of the "imprecision" of Chinese. Chinese Rockets can still launch accurately, and Chinese atomic bombs can also explode accurately. All English scientific and technological literature can be translated into Chinese, For hundreds of years, the research on killing weapons has been too little, plundered and even lagged behind. However, the most difficult time has passed, and China is now reviving at the fastest speed in the world. The influence of Chinese literature is increasing in the world with the enhancement of national strength
.
*The development of modern Chinese
Research shows that: Chinese characters as a complex character symbol system, its information entropy is very high. The basic method of research is: gradually expand the capacity of Chinese characters, with the increase of the capacity of Chinese characters, the increase of information entropy slows down; after the increase of Chinese characters to 12370, the information entropy no longer increases significantly, The static average entropy of Chinese characters is 9.65 bits. According to the famous Zipf's Law (Zipf's law) in mathematical linguistics, it is the most informative character symbol system in the world
French: 3.98 bits
Spanish: 4.01 bits
English: 4.03 bits
Russian: 4.35 bits
Chinese: 9.65 bits
It can be seen that the information entropy of Pinyin characters is small and the difference is not big
What is the concept of information entropy advantage of Chinese characters to Pinyin? A simple metaphor is the difference between decimal number and binary number. Decimal number system requires people to remember 0-9, 10 symbols, binary only needs to remember 0 and 1 symbols. Decimal multiplication and division need to remember 9x9 table, binary only needs to learn simple logic of and, or, not, Why don't human beings use binary number system in their daily life? It's very wasteful. A number "7" is expressed as binary and becomes "111". Memorizing a large number doesn't kill people. On the other hand, why don't human beings use hexadecimal or higher? On the one hand, it's the limitation of human brain's intelligence; on the other hand, it's the limitation of human brain's intelligence, Hexadecimal may not be able to greatly improve information entropy. This kind of information entropy is reflected in the text, that is, the Chinese version of UN documents must be the thinnest. Is high information entropy not conducive to computer processing? I'm afraid it's difficult to draw a conclusion in this respect. A simple comparison of the input speed between Chinese and English can't explain the problem, Because "word" and "word" are different concepts, we can only compare two different texts of the same content and calculate the difference of keystrokes. Based on the unit of "word", modern Chinese and English can be compared, It's just using Latin roots, or recombining existing words. As a result, the more professional and scientific vocabulary, the longer and more difficult it is to remember. Or using abbreviations such as WTO, FBI, IBM, UFO and so on, the more abbreviations, the easier it is to confuse and understand. In this respect, the advantage of modern Chinese word making is very prominent. This is the advantage of high information entropy of Chinese character set
It is absurd to use modern computer technology as the standard of information technology to measure the advantages and disadvantages of Chinese characters and English letters. Modern computer technology is based on "diode" technology in the final analysis, and its future development is hard to predict. Is it necessary for human beings to imitate the "diode" thinking mode with a high degree of intelligence? That is a typical cut foot to fit the shoes, Was it because of the invention of black and white photography that people should discard the color of oil painting? Was it because Morse code was suitable for the newly invented telegraph that people's language should be changed to "tick"?
We should not ignore some difficulties encountered in the application of Chinese characters, but there is no need to exaggerate them. After the invention of movable type printing by the Chinese people in those years, it has not been really applied for a long time. Until the end of the Qing Dynasty, China still used a lot of block printing. The reason is that the number of Chinese characters is too large, and it is too difficult to make a set of character models for printing books, At the beginning of the 20th century, the lack of Chinese character processing software was once an obstacle, but it was soon solved. Now, with the help of computer technology, the spread of Chinese characters is more convenient than ever
The real obstacle to China's progress is not technology, but the confinement of people's thinking. Before the introduction of Western movable type into China, the European Renaissance thought books translated by Matteo Ricci and Xu Guangqi had been printed through ancient engraving. However, at that time and for a long time later, they did not get the attention of Chinese people. This is a very sad thing, Even if we change all our characters into advanced Arabic or Latin spelling like Iran and Turkey, we can't escape the decline like ancient Persia and Ottoman Empire
.
Zhao Shimin's exploring Chinese characters
1、 Chinese characters are the epitome of Chinese people's understanding of nature
Such as "live" character, the earliest form of water on the living root
For example, the word "home", the earliest font room with pigs, pigs have strong fertility, at that time, people's productivity is the most important production, the pig with strong production capacity symbolizes the prosperity of the family
Two. Chinese characters concentrate on the essence of Chinese history before the word.
For example, the word "Si" now refers to "Tian" and "Xin". It seems that "Xin Tian" is in charge of thought. Some people conclude that the organ of thinking that Chinese people did not know before was the brain. This is the earliest glyph of "Si" that he did not see. The first glyph of "Si" is "Xin" below, and "fontanel" above, and "fontanel" is hieroglyphic. It's like the confluence of skulls