invented ultrasound

1. What is pasteurization? The milk pasteuration method was invented by the French user Pasteur in 1865. It was improved by future generations to completely eliminate pathogens in beer, wine, milk, serum albumin, and other liquids, it is also a common milk disinfection method in the world. The purpose of pasteurization is to kill all possible harmful microorganisms (including all pathogenic bacteria) in milk ). Before the pasteuration method was

space position of each point. When a reference beam is used to illuminate a dry film, the light we see is like being sent from the original object. Therefore, we say that it records all the light information sent from the object, and the name of the holographic photo is obtained accordingly. However, laser holographic photos only show a three-dimensional image in the eyes under laser radiation. laser is a expensive device, and a photo must be equipped with a laser, in addition to the possible s

said that God has created natural numbers, and other numbers are invented by humans. Number theory is regarded as pure mathematics, that is, it is too far away from practical application. However, the number theory results of a few hundred years ago seem to have been widely used in a few hundred years. Modern cryptography is based on number theory. The common key cryptography system is based on a large number of prime factors. The Euclidean era prove

CPU companies to consider things, and software engineers completely unrelated.2. Early Paper punch Programmer(1) At the earliest, the CPU was very simple, the instruction set was very small and the number of binary bits was not much. At that time the compiler was not invented, and the programming language was not invented, then it was programmed directly with binary.(2) Summary: The earliest programming ha

Like HTML, XML comes from StandardGeneralizedMarkupLanguage, which is a general Markup Language (SGML) for scale. Before the Web was invented, SGML already existed. As its name implies, SGML is a general language that uses tags to describe document materials. Like HTML, XML comes from Standard Generalized Markup Language (SGML. Before the Web was invented, SGML already existed. As its name implies, SGML is

own doctoral thesis around it and put on his doctor's hat. The one that makes grandpa Dai really famous is the Algo60 developed on X1, one of the earliest advanced languages. Grandpa Dai worked day and night for 8 months, and then he got Algo60. He also won the Turing Award in 1972. Because of Algo60, Grandpa Dai published a shocking article: Recursive Programming, so people know that the original advanced language can also implement recursion efficiently. Since then, all programmers are inevit

-coated shells and took over the hot potato. Two or three years later, he not only made real-time interruptions, but also wrote his own doctoral thesis around it and put on his doctor's hat.　　 #61548; the one that makes grandpa Dai really famous is algo60 developed on X1, one of the earliest advanced languages. Grandpa Dai worked day and night for 8 months, and then he got algo60. He also won the Turing Award in 1972. Because of algo60, Grandpa Dai published a shocking article: recursive program

templates, yes, no, no, supported object-oriented, yes, yes, no, you may have some questions about my language evaluation, please first read my other article Discrimination based on object and object-oriented programming paradigm and Application in mainstream programming languagesClarify related concepts. I am not very familiar with object-oriented and Object-based and popular definitions. Advantages and disadvantages of C Language C Language Let's review the history first. The computer uses C

, with spring in the world, especially when it is blowing to our motherland, it may be the reason for loving the house and the birds (or birds, "Wheel Theory" is also regarded by many spring fans as the creed and principle for people to do things and do things. Is there a problem? Of course there are serious problems. There is no error in the wheel theory. The mistake is the misuse of the wheel theory. The mistake is that everyone is fooled by Uncle Rod Johnson and does not know or admit it. Any

disappear at the end of the terminal ...". Is the general impression of a terminal. The background behind this terminal is really a sea of ocean... We should first consider the following issues: Why do we need to invent a terminal instead of using a graphical interface at the beginning? After all, the mouse + graphic interface is more intuitive. Is it just for the purpose of installing high-end professionals that they deliberately make such a complicated situation, so that people feel

Reverse polish and reverse Polish expressions Poland is a great country. The radioactive element Po in the periodic table was discovered by Mrs Curie and named after her motherland Poland. Polish Notation and Reverse Polish Notation, which are commonly used in computer science, are also named in Poland. China is also a great country, and I know the Chinese remainder theorem is named after China. Other things named after the Chinese title include the Chinese knot, the Chinese Dragon (Chinese Dra

transport layer protocol in the transport layer. Only TCP and UDP are enough. If you want to extend it, You can extend it on UDP.3. several misunderstandings about TCP and UDP before protocol transformation, first clarify several misunderstandings, that is, you need to know why UDP is used instead of TCP, or vice versa, you always think TCP is better than UDP:Misunderstanding 1: UDP is more efficient. Many people think it is because UDP is more efficient. Because ACK is not required, it is most

: recursive programming, so people know that the original advanced language can also implement recursion efficiently. Since then, all programmers are inevitably dealing with the stack, a word invented by grandpa Dai (should be said to be a concept. In addition, algo60 gave Grandpa Dai an in-depth consideration of the problem of multi-channel programming, and finally invented the concept that every system pr

, but like you This kind of cool will certainly be able to say. As a result, Grandpa Dai was thoroughly penetrated by sugar-coated shells. . Two or three years later, he not only made real-time interruptions, but also wrote his own doctoral thesis around it, so he was able to successfully wear Bo. Shi hat. The one that makes grandpa Dai really famous is the algo60 developed on X1, one of the earliest advanced languages. Daye Ye got algo60 after 8 months of work and won the Turing Award i

morality. Every book I can find that talks about China refer Out: "China traditionally attaches importance to moral construction, while ignoring technological progress. Confucius and Lao Tzu created the Chinese spiritual foundation From the philosopher's perspective, scientific and technological advances will make people more and more complex, and thus hinder his moral achievements ." Zhuge Kong Ming apparently He did not only play a role in front of Liu Bei, but did not take into account th

Document directory Unicode Character Set Overview Encoding System Changes Common unicode encoding Unicode-Related Frequently Asked Questions Original article: http://www.cnblogs.com/KevinYang/archive/2010/06/18/1760597.html Character encoding seems to be very small and often ignored by technical staff, but it can easily lead to some inexplicable problems. Here we will summarize some of the popular knowledge about character encoding and hope to help you.I still have to start with the ASC

the rounds of Bram and Carel from the project owner. "We know that real-time interruptions make your work very difficult, but a cool man like you can say it. As a result, Grandpa Dai was thoroughly penetrated by sugar-coated shells and took over the hot potato.Two or three years later, he not only made real-time interruptions, but also wrote his own doctoral thesis around it and put on his doctor's hat. The one that makes grandpa Dai really famous is the algo60 developed on X1, one of the earli

Brief History of Motor development:1.182 Tesla discovered the magnetic effect of the current, and then ampere established the Ampere law by summing up the current in the magnetic field by the mechanical force.Tesla invented the first motor model for 2.1821 years.For 3.1831 years, Faraday invented the world's first truly electric motor, the Faraday disc generator, using electromagnetic induction.In the summe

: Store instruction order in storage and address it with program counters, but also allow conditional transfer. The stored-Program concept is a revolutionary idea that today is called the von Neumann architecture and is the foundation of modern computer design. But the von Neumann architecture also has the disadvantage that it takes a lot of time to get instructions from memory to the CPU to prepare for execution, which is called von Neumann bottleneck. 1948 Lloyd Shann

simplified reflection model called the Phong reflection Model , which is a completely different subject than the Phong, and cannot be confused.In the refraction of light, there is an important concept called refractive index. In most three-dimensional programming implementations, the value "Index of refraction" (refractive index) is usually abbreviated as "IOR".An example of a straight coloring, a three-dimensional painting of the Dunkirk battleshipPopular reflection rendering techniques in thr