The development of LED lighting In 1879, Edison invented the world's first incandescent lamp, using carbon wire as a filament, opened the first revolution in the history of human lighting. The principle of incandescent lamp is that the filament generates heat, the luminous efficiency is low, and
Read moreWith the development of society and the advancement of science and technology, intelligent products have gradually integrated into our daily lives. In 2014, looking at it, intelligence has become a reality. Especially the intelligent lighting, it is the stage of the outbreak, whether it is the inter
Read moreThe 2014 (17th) Chengdu International Automobile Exhibition was held from August 29th to September 7th at the New International Convention and Exhibition Center in Chengdu Century City. The scale of the auto show was 150,000 square meters, with more than 100 automobile brands participating, and the
Read moreWith the country's relevant policies in the electric vehicle industry, China's electric vehicle industry is developing at a high speed. In particular, lead-acid storage battery technology advances, but also promoted the rapid development in the field of transportation. The use of electric pr
Read moreAt the just-concluded 2014 China Automotive Industry Development International Forum, Dong Yang, vice president of the China Automobile Industry Association, said that this year, the country’s automobile production and sales will reach 23.83 million, an increase of 8.3% year-on-year. Regard
Read moreExperimental study of leather wet processing under normal pressure or vacuum Core Tip: [Tags: SY_Introduction] Adsorption and desorption adsorption on the surface of leather and on the surface of internal fibers is a spontaneous process in which the concentration of the substance changes at the
Read moreIn the past two years, the sales volume of the heavy-duty truck industry has been relatively stable, and it is no longer ups and downs. At the same time, its market structure has gradually stabilized. The division of the previous three major groups is no longer clear. Instead, the two camps gradua
Read moreScientists at the University of Illinois at Chicago have recently developed an ultra-sensitive "electronic nose" that can distinguish individual gas molecules. This new type of gas sensor absorbs gas molecules 300 times stronger than traditional chemical sensors. It is incredibl
Read moreWhen you read Harry Potter, do you have the only guide to an invisibility cloak? Scientists at the University of Rochester have found a way to use a cheap and easily available lens to hide large objects in sight, which appears to have emerged from
Read moreIn December, the new version of GMP certification for aseptic drug manufacturers entered the countdown period of days, and listed companies that produce sterile products such as blood products, vaccines, and injections will stop production if they fail to pass the new GMP certification. It is unders
Read moreHow to judge whether the content of crude fiber in feed exceeds the standard The moderate intake of crude fibres by animals is advantageous, but excessive or too little intake is detrimental to the body, so animal feed must be properly tailored and controlled. The use of fibers by vario
Read moreNow that the price of oil is rising at a rapid rate, there will be no downward trend at one and a half. How can we have both cars and money? ? Here are some fuel-saving tips that I hope will help everyone. First, maintain a reasonable speed Each type of car has its own economical speed.
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