China sends two satellites into orbit on a single carrier rocket for its domestic BeiDou Navigation Satellite System (BDS) in Xichang, Southwest China's Sichuan province, Feb 12, 2018. [Photo/Xinhua] BEIJING -- China has developed and tested a wireless measuring system for rockets, the Science and Technology Daily reported on Monday. Developed by the China Academy of Launch Vehicle Technology (CALT), the wireless system has been installed in Long March-3B carrier rocket, which took the communication satellite APSTAR-6C into orbit in early May. Sensors in the rockets are usually connected by cables, which increases the weight of the rocket and causes difficulties in layout design. Although wireless technology has been widely used in some electronic devices, rockets have to withstand extreme high and low temperatures, strong forces caused by separation, and a complicated electromagnetic environment. event wristbandsbest friend rubber braceletscustom silicone braceletsinspirational rubber braceletscustom charm bracelets
Fog and smog shroud a high rise in Handan, North China's Hebei province on Nov 13. [Photo/IC] BEIJING - Beijing Municipal air pollution emergency response office on Tuesday issued a yellow alert for smog, reminding residents to take precautions against it. The air pollution will persist until Thursday. The central part of the Beijing-Tianjin-Hebei region is forecast to see moderate to severe air pollution during the period, said a source with the Beijing Municipal Bureau of Ecology and Environment. The yellow alert is issued when the air quality index surpasses 200 or the average density of PM2.5 stays above 150 micrograms per cubic meter for two consecutive days. Under Beijing's current three-tier warning system, the yellow alert is the least severe, followed by orange and red. The yellow alert and above will trigger a series of compulsory emergency responses including the suspension of outdoor construction operations to reduce dust, the restriction of heavy pollution vehicles or the suspension of production in smokestack industries. custom silicone braceletsrubber band braceletssilicone wristbandscystic fibrosis rubber braceletscustom bracelets<%2fcenter>
