Solar energy is one of clean energies which has the most development and application prospect. And solar photovoltaic industry is the main force foe the development of new energy industry. This paper points out the ob...Solar energy is one of clean energies which has the most development and application prospect. And solar photovoltaic industry is the main force foe the development of new energy industry. This paper points out the obstacles which improves the international competitiveness of China' s photovoltaic industry based on the analysis of the three big indexes, namely the international competitiveness of photovoltaic industry IMS, TCD and RCI, and proposes the suggestion which enhances the competitive advantage of China' s solar photovoltaic industry.展开更多
The research is to design a differential pumping system not only to achieve the pressure transition with a large throughput,but also to achieve a clean system without back-oil.In the paper,the pressure in differential...The research is to design a differential pumping system not only to achieve the pressure transition with a large throughput,but also to achieve a clean system without back-oil.In the paper,the pressure in differential stages is calculated;the differential pumping system design and equipment choice are introduced;the tests of Molecular/Booster Pump(MBP),a new kind of molecular-drag pump with large throughout and clean vacuum are described and the system experimental result and analysis are presented.展开更多
文摘Solar energy is one of clean energies which has the most development and application prospect. And solar photovoltaic industry is the main force foe the development of new energy industry. This paper points out the obstacles which improves the international competitiveness of China' s photovoltaic industry based on the analysis of the three big indexes, namely the international competitiveness of photovoltaic industry IMS, TCD and RCI, and proposes the suggestion which enhances the competitive advantage of China' s solar photovoltaic industry.
文摘The research is to design a differential pumping system not only to achieve the pressure transition with a large throughput,but also to achieve a clean system without back-oil.In the paper,the pressure in differential stages is calculated;the differential pumping system design and equipment choice are introduced;the tests of Molecular/Booster Pump(MBP),a new kind of molecular-drag pump with large throughout and clean vacuum are described and the system experimental result and analysis are presented.