Test the machine:

Testing machine, broadly speaking, is an instrument to verify the quality or performance of products or materials according to the design requirements before they are put into use. As can be seen from the definition, any instrument that verifies quality or performance can be called a testing machine. The products of the testing machine are constantly innovated, improved and perfected, which can adapt to the various properties of the tested materials.

The testing machine is mainly used to measure the physical properties of materials or products, such as yield strength, tensile strength and impact toughness. Used to measure the chemical properties of materials, that is, chemical composition, is generally called analyzer, not testing machine.

Computer:

Computer, commonly known as computer, is a modern electronic computer used for high-speed calculation, which can not only perform numerical calculation, but also logical calculation, and also has the functions of storage and memory. It is a modern intelligent electronic device that can run according to the program and automatically process massive data at high speed. It consists of hardware system and software system, and a computer without any software is called bare metal.

It can be divided into five categories: supercomputer, industrial control computer, network computer, personal computer and embedded computer. More advanced computers include biological computers, photonic computers and quantum computers. John von neumann, the inventor of the computer. Computer is one of the most advanced scientific and technological inventions in the 20th century, which has had an extremely important impact on human production and social activities, and has developed rapidly with strong vitality.

Its application field has expanded from the initial military scientific research application to all fields of society, forming a huge computer industry, promoting global technological progress and triggering profound social changes. Computers have spread all over ordinary schools, enterprises and institutions, entered the homes of ordinary people and become an indispensable tool in the information society.

Education network:

CERNET (China Education and Scientific Research Computer Network) is a national academic computer internet invested by the state, managed by the Ministry of Education, and built, managed and operated by universities such as Tsinghua University. Mainly for educational and scientific research institutions, it is the largest public welfare Internet in China. 1996 was recognized by the State Council as one of the four national backbone networks.