Development and changes of science and technology in recent 100 years.

In the past century, mankind has a lot to remember, among which many great scientific and technological inventions and innovations have brought earth-shaking changes to our lives, and thinkers' predictions have often come true.

American scientist Franklin once said: In the future, human knowledge will be greatly increased, and new inventions that we did not expect will appear frequently today. Sometimes I almost regret that I was born too early and didn't know what would happen. He's right.

In the past 100 years, human science and technology can only be described as rapid progress. If an inventor of 1900 is asked to look at today's world, he will recognize cars, telephones and airplanes, and he can also imagine spaceships and deep-sea submarines, but he certainly knows nothing about computers, the Internet, genetic engineering and nuclear energy.

Now, the explosion of knowledge has given mankind unprecedented confidence and optimism. A writer wrote: "I sincerely believe that we live in the greatest era of knowledge in human history, and there is nothing we don't understand." "As long as people can think of something, someone can do it." The development of science and technology in the 20th century makes this sentence more and more like truth.

Scientific and technological progress has completely changed the way of human existence and changed the direction of human thinking. There is no doubt that in the next 10 to 20 years, there will be explosive breakthroughs and expansions in science and technology in many fields.

Maybe the human brain and computer can be integrated, maybe we can settle on Mars, maybe everyone can clone spare organs, maybe we can review the scientific and technological inventions that brought great changes to human life in the twentieth century, look forward to the future development trend of science and technology, and enter a new era of knowledge economy.

The development of science and technology in the past century;

A major breakthrough has been made in the technical development and industrial test of methanol to light olefins?

Dalian Institute of Chemistry, China Academy of Sciences, Shaanxi Xinxing Coal Chemical Technology Development Co., Ltd. and Luoyang Petrochemical Engineering Company of China Petrochemical Group have made a major breakthrough in the industrial pilot project of "Technical Development of Methanol to Low Olefin (dmto)".

In an industrial experimental plant with a daily output of 50 tons of methanol, the conversion rate of methanol is nearly 100%, the selectivity of ethylene is 40. 1%, the selectivity of propylene is 39.0%, and the selectivity of low-carbon olefins (ethylene, propylene and butene) is over 90%. The successful operation of the experimental device is of great economic and strategic significance to the comprehensive utilization of energy and the diversification of low-carbon olefin raw materials in China.