This paper analyzed the reliability and put forward the reliability index of overload protection for moulded case circuit breaker. The success rate was adopted as its reliability index of overload protection. Based on...This paper analyzed the reliability and put forward the reliability index of overload protection for moulded case circuit breaker. The success rate was adopted as its reliability index of overload protection. Based on the reliability index and the reli- ability level, the reliability examination plan was analyzed and a test device for the overload protection of moulded case cir- cuit-breaker was developed. In the reliability test of overload protection, two power sources were used, which reduced the time of conversion and regulation between two different test currents in the overload protection test, which made the characteristic test more accurate. The test device was designed on the base of a Windows system, which made its operation simple and friendly.展开更多
Hepatic fibrosis is the liver＇s wound healing response to virtually all forms of chronic liver injury： toxic insult, viral infection, immunological conditions and metabolic diseases. Uncontrolled liver fibrosis even...Hepatic fibrosis is the liver＇s wound healing response to virtually all forms of chronic liver injury： toxic insult, viral infection, immunological conditions and metabolic diseases. Uncontrolled liver fibrosis eventually results in cirrhosis and associated complications, such as cancer and liver failure. Given the enormous public health implications, recent improvements in the treatment of chronic liver disease have accelerated interest in uncovering the mechanisms underlying hepatic fibrosis and its resolution. Currently, it is believed that activation of quiescent hepatic stellate cells （HSC） into proliferative, contractile, and fibrogenic cells in response to liver injury appears to be the dominant driving force in fibrosis.展开更多
基金Project (No. E2005000039) supported by the Natural Science Foun-dation of Hebei Province, China
文摘This paper analyzed the reliability and put forward the reliability index of overload protection for moulded case circuit breaker. The success rate was adopted as its reliability index of overload protection. Based on the reliability index and the reli- ability level, the reliability examination plan was analyzed and a test device for the overload protection of moulded case cir- cuit-breaker was developed. In the reliability test of overload protection, two power sources were used, which reduced the time of conversion and regulation between two different test currents in the overload protection test, which made the characteristic test more accurate. The test device was designed on the base of a Windows system, which made its operation simple and friendly.
基金This study was supported by a grant from the National Natural Science Foundation of China （No. 30872513）.
文摘Hepatic fibrosis is the liver＇s wound healing response to virtually all forms of chronic liver injury： toxic insult, viral infection, immunological conditions and metabolic diseases. Uncontrolled liver fibrosis eventually results in cirrhosis and associated complications, such as cancer and liver failure. Given the enormous public health implications, recent improvements in the treatment of chronic liver disease have accelerated interest in uncovering the mechanisms underlying hepatic fibrosis and its resolution. Currently, it is believed that activation of quiescent hepatic stellate cells （HSC） into proliferative, contractile, and fibrogenic cells in response to liver injury appears to be the dominant driving force in fibrosis.
