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The Existence of Multiple Solutions for Second Order Differential Equations with Infinite Delay
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作者 孙兴旺 代新利 《Chinese Quarterly Journal of Mathematics》 CSCD 2003年第4期378-387,共10页
This paper discusses the existence of multiple solutions for second order differential equations with infinite delay.
关键词 differential euqations infinite delay Schauder fixed point theorem
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Laser Engineered Net Shaping Technology
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作者 尚晓峰 刘伟军 +2 位作者 王天然 胡芳友 李艳丽 《Journal of Shanghai University(English Edition)》 CAS 2004年第A02期26-29,共4页
Laser engineered net shaping (LENS) technology is a new type of rapid prototyping technology, which combines the conventional rapid prototyping technology with the laser cladding technology, and studies the rapid manu... Laser engineered net shaping (LENS) technology is a new type of rapid prototyping technology, which combines the conventional rapid prototyping technology with the laser cladding technology, and studies the rapid manufacture technology of metal components and moulds with comparatively complex shape or complex component. The laser engineered net shaping system is made up of by five modules. The hardware composition and operating principle of the modules are introduced in detail. 展开更多
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