Abstract: The present invention provides an arc-extinguishing device, including an arc-extinguishing chamber, where the arc-extinguishing chamber includes a support, a plurality of arc-extinguishing grid sheets, a first gas-evolving hood, and a second gas-evolving hood; the plurality of arc-extinguishing grid sheets are mounted on the supports, the arc-extinguishing grid sheet has a groove to form a moving track for a moving contact, both sides of the groove extend toward the moving contact respectively to form a first extension leg and a second extension leg, an end and an inner side of the first extension leg are wrapped by the first gas-evolving hood, and an end and an inner side of the second extension leg are wrapped by the second gas-evolving hood; a surface of the gas-evolving hood extending along the inner side of the extension leg toward the groove is referred to as a wrapping surface.

Abstract: The present invention provides an arc-extinguishing device, including an arc-extinguishing chamber, where the arc-extinguishing chamber includes a support, a plurality of arc-extinguishing grid sheets, a first gas-evolving hood, and a second gas-evolving hood; the plurality of arc-extinguishing grid sheets are mounted on the supports, the arc-extinguishing grid sheet has a groove to form a moving track for a moving contact, both sides of the groove extend toward the moving contact respectively to form a first extension leg and a second extension leg, an end and an inner side of the first extension leg are wrapped by the first gas-evolving hood, and an end and an inner side of the second extension leg are wrapped by the second gas-evolving hood; a surface of the gas-evolving hood extending along the inner side of the extension leg toward the groove is referred to as a wrapping surface.

Abstract: This invention is related to a method for design and implementation of wide-area data sharing applications in the Internet and World Wide Web environment. The kernel of the invention is a middle tier that facilitates data integration over the Web. For each specific data sharing application, the middle tier is composed of an XML-based standard and an in-memory data structure. While the XML-based standard defines the syntax and semantics for the data to be shared and integrated, the in-memory data structure accommodates the data elements in a source-independent, relational format for manipulation in disconnected mode. The equivalency between the XML-based standard and the in-memory lays a solid basis for data integration over the Web. Data exchange in this distributed environment is realized by using Web services. Furthermore, the XML-based standard and in-memory data structure may also be extended to support distributed query processing and distributed transaction management in this environment.