Thursday, May 18, 2017
Friday, April 1, 2016
The Origin of Qingming Festival
Qingming Festival, also known as Pure Brightness Festival or Tomb-sweeping Day, is one of the 24 segments of the Chinese calendar. It normally falls on the 4th or 5th of April, between spring plowing and summer weeding, and is a time to pay respects to one's ancestors and to tidy their gravesite. On this day, whole families, young and old, go to the gravesite of deceased family members to burn incense and perform a ritual offering while clearing away plant overgrowth from the gravesite.
Qingming Festival is when Chinese people visit the graves or burial grounds of their ancestors. Traditionally, people brought a whole rooster with them to the graves visited but the occasion has become less formal over time. The festival originated from Hanshi Day (寒食节, literally, Day with cold food only), a memorial day for Jie Zitui (介子推, or Jie Zhitui). Jie Zitui died in 636 BC in the Spring and Autumn Period. He was one of many followers of Duke Wen of Jin before he became a duke.
Once, during Wen's 19 years of exile, they had no food and Jie prepared some meat soup for Wen. Wen enjoyed it a lot and wondered where Jie had obtained the soup. It turned out Jie had cut a piece of meat from his own thigh to make the soup. Wen was so moved he promised to reward him one day. However, Jie was not the type of person who sought rewards. Instead, he just wanted to help Wen to return to Jin to become king.
Once Wen became duke, Jie resigned and stayed away from him. Duke Wen rewarded the people who helped him in the decades, but for some reason he forgot to reward Jie, who by then had moved into the forest with his mother. Duke Wen went to the forest, but could not find Jie. Heeding suggestions from his officials, Duke Wen ordered men to set the forest on fire to force out Jie. However, Jie died in the fire. Feeling remorseful, Duke Wen ordered three days without fire to honour Jie's memory. The county where Jie died is still called Jiexiu (介休, literally "the place Jie rests forever").
Thursday, March 24, 2016
Polyamide enameled round copper wire,class 220
Basic type:QY/220; PIW/220
Size range: 0.060-0.6mm
Material requirement: quality polyimide
Standard in accordance with: GB/T6109.6-2008; IEC 60317-7:1997
Product characteristics and application: Enameled round copper wire can be in 220c environment work continuously, in addition to heat resistant performance as a class 240 polyimide outside, in resistance to cold, resistant to radiation frozen agents, chemical resistance is the precious has outstanding performance. So widely used in atomic response, aerospace, coal mine motor, nuclear energy, military industry etc special field.
Size range: 0.060-0.6mm
Material requirement: quality polyimide
Standard in accordance with: GB/T6109.6-2008; IEC 60317-7:1997
Product characteristics and application: Enameled round copper wire can be in 220c environment work continuously, in addition to heat resistant performance as a class 240 polyimide outside, in resistance to cold, resistant to radiation frozen agents, chemical resistance is the precious has outstanding performance. So widely used in atomic response, aerospace, coal mine motor, nuclear energy, military industry etc special field.
Wednesday, March 16, 2016
Enameled Wire Insulation
Although described as "enameled", enameled wire is not, in fact, coated with either a layer of enamel paint nor with vitreous enamel made of fused glass powder. Modern magnet wire typically uses one to four layers (in the case of quad-film type wire) of polymer film insulation, often of two different compositions, to provide a tough, continuous insulating layer. Magnet wire insulating films use (in order of increasing temperature range) polyvinyl formal (Formvar), polyurethane, polyamide, polyester, polyester-polyimide, polyamide-polyimide (or amide-imide), and polyimide. Polyimide insulated magnet wire is capable of operation at up to 250 °C.
Self-supporting coils are wound with wire coated with at least two layers, the outermost being a thermoplastic that bonds the turns together when heated.
Other types of insulation such as fiberglass yarn with varnish, aramid paper, kraft paper, mica, and polyester film are also widely used across the world for various applications like transformers and reactors. In the audio sector, a wire of silver construction, and various other insulators, such as cotton (sometimes permeated with some kind of coagulating agent/thickener, such as beeswax) and polytetrafluoroethylene (Teflon) can be found. Older insulation materials included cotton, paper, or silk, but these are only useful for low-temperature applications (up to 105°C).
For ease of manufacturing, some low-temperature-grade magnet wire has insulation that can be removed by the heat of soldering.This means that electrical connections at the ends can be made without stripping off the insulation first.
The insulation of thicker square or rectangular magnet wire is often augmented by wrapping it with a high-temperature polyimide or fiberglass tape, and completed windings are often vacuum impregnated with an insulating varnish to improve insulation strength and long-term reliability of the winding.
Self-supporting coils are wound with wire coated with at least two layers, the outermost being a thermoplastic that bonds the turns together when heated.
Other types of insulation such as fiberglass yarn with varnish, aramid paper, kraft paper, mica, and polyester film are also widely used across the world for various applications like transformers and reactors. In the audio sector, a wire of silver construction, and various other insulators, such as cotton (sometimes permeated with some kind of coagulating agent/thickener, such as beeswax) and polytetrafluoroethylene (Teflon) can be found. Older insulation materials included cotton, paper, or silk, but these are only useful for low-temperature applications (up to 105°C).
For ease of manufacturing, some low-temperature-grade magnet wire has insulation that can be removed by the heat of soldering.This means that electrical connections at the ends can be made without stripping off the insulation first.
Monday, March 7, 2016
The first International Women’s Day
Today is International Women's Day. Do you know the date of the first Women's day? Now let me tell you.
In 1869 British MP John Stuart Mill was the first person in Parliament to call for women’s right to vote. On 19 September 1893 New Zealand became the first country in the world to give women the right to vote. Women in other countries did not enjoy this equality and campaigned for justice for many years.
In 1869 British MP John Stuart Mill was the first person in Parliament to call for women’s right to vote. On 19 September 1893 New Zealand became the first country in the world to give women the right to vote. Women in other countries did not enjoy this equality and campaigned for justice for many years.
In 1910 a second International Conference of Working Women was held in Copenhagen. A woman named Clara Zetkin (Leader of the ‘Women’s Office’ for the Social Democratic Party in Germany) tabled the idea of an International Women’s Day. She proposed that every year in every country there should be a celebration on the same day - a Women’s Day - to press for their demands. The conference of over 100 women from 17 countries, representing unions, socialist parties, working women’s clubs, and including the first three women elected to the Finnish parliament, greeted Zetkin’s suggestion with unanimous approval and thus International Women’s Day was the result.
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