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分段多点成形中局部剧烈塑性变形的产生及抑制 被引量:1
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作者 刘伟 陈建军 +2 位作者 李明哲 贾树盛 张传敏 《高技术通讯》 CAS CSCD 北大核心 2005年第12期47-51,共5页
分析了分段多点成形时工件受力状态和变形比整体多点成形及传统模具成形更加复杂,过渡区内极易出现局部剧烈塑性变形,严重影响分段成形工件质量的现象,研究了过渡区局部剧烈塑性变形的形成机理,采用遗传算法进行了协调区表面的曲面造型... 分析了分段多点成形时工件受力状态和变形比整体多点成形及传统模具成形更加复杂,过渡区内极易出现局部剧烈塑性变形,严重影响分段成形工件质量的现象,研究了过渡区局部剧烈塑性变形的形成机理,采用遗传算法进行了协调区表面的曲面造型设计,抑制了局部剧烈塑性变形的产生.实验证明,这种基于遗传算法的构造协调区表面形状的方法非常有效,不但能成功地抑制局部剧烈塑性变形的产生,还可提高成形效率. 展开更多
关键词 分段多点成形 局部剧烈塑性变形 协调区方法 板料成形
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The Flying Geese Paradigm:Industrial Upgrade Strategy and Balanced Regional Development
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作者 张其仔 《China Economist》 2014年第5期66-87,共22页
On the basis of competency-based comparative advantage theory and reclassification of industries,this paper has discussed whether the FGP-type industry upgrade has taken place across different regions of China and whe... On the basis of competency-based comparative advantage theory and reclassification of industries,this paper has discussed whether the FGP-type industry upgrade has taken place across different regions of China and whether China is able to transcend the middle-income trap through the FGP-type industry upgrade.This paper has discovered that no matter by traditional method of industry classification or the new method of industry classification,China has already experienced the FGP-type industry upgrade and entered into the second stage of this process.While relocating industries to central and western regions,China's eastern region does not have clear directions of industry upgrade of its own.Through analysis on the evolution of comparative advantages across regions,this paper has also discovered that in the process of the FGP industry upgrade,China is facing the risk of falling into comparative advantage trap.These factors are unfavorable to China's implementation of the FGP-type industry upgrade strategy,prevention of the comparative advantage interruptions that may confront middle-income countries and achievement of balanced regional development. 展开更多
关键词 The FGP-type industry upgrade product space comparative advantage
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