What scientific and technological achievements have been made in the 20th century (mankind ...)
The 500-meter spherical radio telescope, referred to as FAST, is located in Dawodang karst depression, Kedu Town, Pingtang County, Qiannan Buyi and Miao Autonomous Prefecture, Guizhou Province. This project is a major national science and technology infrastructure. The "Eye of the Sky" project consists of an active reflector system, a feed support system, a measurement and control system, a receiver, a terminal and an observation base.
The world's largest spherical radio telescope with a diameter of 500 meters, referred to as FAST, also known as the "eye of the sky", was officially opened in Guizhou karst tiankeng. FAST will maintain the status of world-class equipment in the next 10 to 20 years, and become a "sharp weapon" for astronomical research in China and even the world.
2.DNA double helix structure
1953, Watson and Crick discovered the double helix structure of DNA, which opened the era of molecular biology, made the study of heredity go deep into the molecular level, uncovered the "mystery of life", and people clearly understood the composition and transmission mode of genetic information.
In the next 50 years, new disciplines such as molecular genetics, molecular immunology and cell biology have sprung up, which have clarified the mystery of life more clearly from the molecular point of view. DNA recombination technology has opened up a broad prospect for the research and application of bioengineering means.
3. Shenwei Taihu Light Supercomputer
Shenwei Taihu Light Supercomputer is a supercomputer developed by National Parallel Computer Engineering Technology Research Center and installed in Wuxi National Supercomputing Center.
Shenwei Taihu Light Supercomputer has 40,960 "Shenwei 260 10" many-core processors independently developed by China. Many-core processor adopts 64-bit independent Shenwei instruction system, with peak performance of 654.38+0.25 billion cycles per second and continuous performance of 930 million cycles per second.
2016165438+1October 14 In the new top 500 list released by Salt Lake City, USA, "Shenwei Light of Taihu Lake" easily won the championship with a large operation speed advantage; 165438+1October18th, Chinese researchers won the "Gordon Bell Award" for the first time based on the application results of the "Shenwei Taihu Light" supercomputer, achieving a zero breakthrough in the application results of high-performance computing in China.
4, the first generation of electronic computers
The world's first general-purpose computer "ENIAC" was born in February 1946 at the University of Pennsylvania. Inventors are Americans Moakley and J.PresperEckert, and the U.S. Department of Defense uses it for ballistic calculation.
It is a giant, with 18000 electron tubes, an area of 170 square meters, weighing 30 tons, consuming about 150 kilowatts of electricity, and performing 5000 operations per second, which is insignificant now, but unprecedented at that time.
ENIAC uses electron tubes as components, so it is also called electron tube computer, which is the first generation computer. Electron tube computers are bulky, consume high power, are prone to heat, and cannot work for long.
5, artificial earth satellite
Artificial earth satellite refers to an unmanned spacecraft that flies around the earth and runs in space orbit for more than one circle. Satellite for short. Man-made satellite is the spacecraft with the largest number of launches, the widest use and the fastest development. It is mainly used in scientific exploration and research, weather forecast, land resources investigation, land use, regional planning, communication, tracking, navigation and other fields.
Baidu Encyclopedia -500-meter spherical radio telescope
Baidu encyclopedia -—DNA double helix structure
Baidu Encyclopedia-Shenwei Taihu Light Supercomputer
Baidu encyclopedia-the first generation of electronic computers
Baidu encyclopedia-artificial earth satellite