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用于轧钢机鼓形齿加工的机床简易数控改造
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作者 戴素江 《新技术新工艺》 北大核心 2002年第1期4-5,共2页
用普通机床对大型轧钢机械上的鼓形齿进行加工时 ,加工比较困难 ,精度很难保证。为了扩大原机床的加工范围 ,提高加工精度 ,我们运用机电一体化知识对老设备 Y3 1 80型滚齿机进行了简易数控改造 ,这样改造后既可以维持原机床的加工性能 ... 用普通机床对大型轧钢机械上的鼓形齿进行加工时 ,加工比较困难 ,精度很难保证。为了扩大原机床的加工范围 ,提高加工精度 ,我们运用机电一体化知识对老设备 Y3 1 80型滚齿机进行了简易数控改造 ,这样改造后既可以维持原机床的加工性能 ,又扩大了加工范围 ,提高了精度 ,而且不但可以节省资金 ,又能达到预期效果。 展开更多
关键词 圆弧过渡 圆弧程序 间补值 定位精度 轧机 鼓形齿联轴器 数控机床
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A Study on Marine Region Carrying Capacity and Eco-compensation 被引量:4
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作者 MA Caihua YOU Kui +2 位作者 MA Weiwei XIE Jun LI Fengqi 《Journal of Ocean University of China》 SCIE CAS 2012年第2期253-256,共4页
With the using up of land resources, people are beginning to pay attention to the exploitation of the ocean and the use of marine resources is becoming more and more intense. Whether and how the ocean can be sustainab... With the using up of land resources, people are beginning to pay attention to the exploitation of the ocean and the use of marine resources is becoming more and more intense. Whether and how the ocean can be sustainably exploited as it is being exploited is an academic hot topic. This question is addressed in this paper based on the theories of carrying capacity of a marine region and marine eco-compensation, and the amount of the loss is calculated by the method of Time Value of Capital. This thesis covers the study of eco-compensation between two specific subjects with clear compensation objects, and as a defined approach and standard, the proposed method has good operability and positive practical significance in the good use of the ocean. 展开更多
关键词 carrying capacity of marine region marine eco-compensation time value of capital
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Complementarity Problems for Multivalued Non-Monotone Operators in Banach Spaces
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作者 郭伟平 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2007年第2期323-327,共5页
We utilize Park's maximal element theorem in H-space to prove the existence theorems of solutions of the complementarity problems for multivalued non-monotone operators in Banach spaces.
关键词 H-SPACE Banach space multivalued non-monotone operator complementarity problem.
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Interpolation of Lorentz martingale spaces 被引量:4
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作者 REN YanBo GUO TieXin 《Science China Mathematics》 SCIE 2012年第9期1951-1959,共9页
In this paper,we apply function parameters,introduced by Persson,to real interpolation of Lorentz martingale spaces.Some new interpolation theorems concerning Lorentz martingale spaces are formulated.The results that ... In this paper,we apply function parameters,introduced by Persson,to real interpolation of Lorentz martingale spaces.Some new interpolation theorems concerning Lorentz martingale spaces are formulated.The results that we obtain generalize some fundamental interpolation theorems in classical martingale Hp theory. 展开更多
关键词 MARTINGALE Lorentz space INTERPOLATION function parameter
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