Alexander Graham Bell (1March 3, 847-1August 2, 922) was an American inventor and entrepreneur.
He obtained the patent right of the world's first available telephone and founded the Bell Telephone Company (AT & amp； The predecessor of t company).
There is still controversy about the inventor of the telephone. On June 5th, 2002, the US Congress recognized antonio meucci, an Italian, as the inventor of the telephone.
The Canadian Parliament passed a resolution on June 2 1 2002, reaffirming that Bell was the inventor of the telephone, while others believed that Elisha Gray was the inventor of the telephone.
Edison invented electric light, movies, telegrams, telephones, phonographs, photocopiers and so on.
Thomas Alva Edison (1847, February11-1,10, 10/8) was born in Milan, Ohio.
Inventors and entrepreneurs.
Edison was the first person in human history to make use of a large number of production principles and electrical engineering research laboratories to patent inventions, which had a far-reaching impact on the world.
His invention of the phonograph, movie camera and electric light had a great influence on the world.
He had more than 2,000 inventions and 1000 patents in his life.
Edison was named the ninth among 100 people who influenced the United States by the authoritative American periodical Atlantic Monthly.
3. Nobel invented explosives.
Alfred bernhard nobel, Swedish chemist, engineer, inventor, military equipment manufacturer and explosive inventor, was born in Stockholm on June 2/9261833, and died on February 26/Kloc-0.
Nobel has 355 patented inventions in his life, and has opened about 100 companies and factories in 20 countries on five continents, such as Europe and America, and accumulated huge wealth.
1895, Nobel ordered to use most of his legacy (about 9.2 million US dollars) as a fund, divide the annual interest into five parts, and set up the Nobel Prize, which is divided into five categories: physics prize, chemistry prize, physiology or medicine prize, literature prize and peace prize, and awarded to people all over the world who have made great contributions to mankind in these fields.
In order to commemorate Nobel's contribution, artificial elements are named after Nobel.
Galileo invented the thermometer.
The earliest thermometer was invented by Italian scientist Galileo (1564 ~ 1642) in 1593.
His first thermometer was a glass tube with an opening at one end and a glass bulb the size of a walnut at the other.
When in use, the glass bulb is heated first, and then the glass tube is inserted into water.
With the change of temperature, the water surface in the glass tube will move up and down, and the temperature change and temperature level can be judged according to the movement amount.
Thermometers expand with heat and contract with cold, so this kind of thermometer is greatly influenced by environmental factors such as external atmospheric pressure, so the measurement error is large.
5. Wang Xuan invented laser phototypesetting of Chinese characters.
Wang Xuan's main academic work is engaged in the research of computer logic design, architecture and high-level language compilation system, and presided over the development of Huaguang and Founder computer laser Chinese character typesetting systems for typesetting official publications such as books, periodicals and newspapers.
Aiming at the technical difficulties caused by the large number of Chinese characters, the large number of Chinese fonts for printing and the high resolution required for accurate typesetting, a high-speed information compression and high-speed recovery method for high-resolution fonts was invented, and a special VLSI recovery algorithm was designed on Huaguang IV and Founder 9 1 and 93, which significantly improved the cost performance of the system.
20 18 12 18 the CPC central Committee and the State Council awarded comrade Wang Xuan the title of reform pioneer, the medal of reform pioneer, and the title of "practical explorer of scientific and technological system reform".