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基于改进免疫遗传算法的加工工艺重构 被引量:6
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作者 徐立云 刘伟 +1 位作者 楼科文 李爱平 《同济大学学报(自然科学版)》 EI CAS CSCD 北大核心 2016年第6期907-914,921,共9页
针对产品生命周期内不同阶段市场需求量不同,通过添加或移除相应机床与装夹设备以满足其产能需求变化.针对某产品减产情况,基于抽调原则选择合适生产设备进行移除以适应产能需求;采用一种疫苗自动获取与动态更新的改进免疫遗传算法,通... 针对产品生命周期内不同阶段市场需求量不同,通过添加或移除相应机床与装夹设备以满足其产能需求变化.针对某产品减产情况,基于抽调原则选择合适生产设备进行移除以适应产能需求;采用一种疫苗自动获取与动态更新的改进免疫遗传算法,通过对相应基因座上基因值的转移调整替代交叉变异算子,从而实现可转移操作在不同工位间的转移,并以瓶颈节拍时间最短和工位间不平衡度最小为目标函数,对原有加工工艺转移重构从而达到新构形下的工艺平衡与优化.最后通过实例分析与对比验证方法的有效性. 展开更多
关键词 可重构制造系统 工艺重构 生产构形 改进免疫遗传算法
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The basic theory of industrial ecological economics 被引量:1
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作者 Ma Chuandong 《Ecological Economy》 2007年第4期355-364,共10页
There is a great difference between the new type industrialization road in China and the road of industrialization first, then informatization and at last ecologization in western developed countries. Industrial eco-e... There is a great difference between the new type industrialization road in China and the road of industrialization first, then informatization and at last ecologization in western developed countries. Industrial eco-economics is one of the critical branches of eco-economics. It is a subject of objective law of structural upgrading, functional optimization and highly efficient running of industrial eco-economic system, which is combined with industrial economic system and eco-system under the condition of intellectual economy and circular economy combinations. Meanwhile, it is a relatively weak subject in the research field of eco-economics in China for the time being. Taking the practice road of new type industrialization needs the guidance of industrial eco-economics. The modern industrial eco-economics in the 21st century must be adapted to the need of new type road of industrialization in China. The paper analyzes the status quo of research and the main contents of industrial eco-economics and tries to study some key theories of the branch subject. 展开更多
关键词 Industrial eco-economics Eco-industry Industrial eco-economic system New type of industrialization rood
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Morphology and structure of the ovipositor in Macrocentrus cingulum (Hymenoptera: Braconidae), a polyembryonic parasitoid
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作者 LI Yong LU Jian-feng +1 位作者 KE Xin FU Wen-jun 《Journal of Life Sciences》 2007年第1期34-39,共6页
The ovipositor of parasitic insect is a highly specialized organ and crucial for parasitising. Morphology and structure of the ovipositor in female Macrocentrus cingulum, a polyembryonic parasitoid, are observed in SE... The ovipositor of parasitic insect is a highly specialized organ and crucial for parasitising. Morphology and structure of the ovipositor in female Macrocentrus cingulum, a polyembryonic parasitoid, are observed in SEM studies. The ovipositor of M. cingulum consists of the valvulae 1, 2 and 3. The valvulae 1 and 2 of ovipositor house in the valvulae 3 at rest and the valvulae 1 and 2 part from the valvulae 3 at probing and ovipositing. The cross-section of valvulae 3 shows that the valvulae 3 is hollow which may reduce the weight of ovipositor and make the ovipositor more flexible. The distal end of stylus (valvulae l, 2) becomes extremely sharp and the piercing tip of valvulae 1 and 2 form the arrangement of tongue-and-groove. This arrangement may support valvulae 2 slide longitudinally along the valvulae 1. Numbers of pores are distributed on the cuticle of the valvulae l and 2. The piecing tip of valvulae 1 and 2 have more pores than proximal and intermediate region. The out side of valvulae 3 is completely covered with chactica sensilla and the distal end of valvulae 3 has more sensilla than proximal and intermediate region. The function and structure of ovipositor of M. cingulum was discussed and compared with other species. 展开更多
关键词 Macrocentrus cingulum PARASITOID OVIPOSITOR
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SPECIAL ISSUE: DISTRIBUTION OF NATIONAL INCOME IN A TRANSITIONAL ECONOMY Changes in the labor share of GDP: a U-shaped curve 被引量:3
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作者 David Daokui Li Liu Linlin Wang Hongling 《Social Sciences in China》 2009年第4期131-153,共23页
In this paper, we try to find some general rules and the structural factors that cause a fall in labor economic growth in countries all over the world, the by a U-shaped curve in which the tuming point is for labor sh... In this paper, we try to find some general rules and the structural factors that cause a fall in labor economic growth in countries all over the world, the by a U-shaped curve in which the tuming point is for labor share in primary distribution share. We show that, in the process of evolution of labor share is characterized $6,000 per capita GDP (in PPP, 2000). We develop a model to explain this phenomenon that provides an in-depth explanation for Kuznets' inverted U hypothesis. Our findings indicate that the evolution of China's labor share is basically consistent with the model we have constructed. In addition, sectoral composition and the relative bargaining power of labor are also factors influencing labor share. These findings imply that labor share of primary distribution in China may enter an upward trajectory over the next two years. This process may be accelerated by the central government's policies for dealing with global financial crisis and by structural adjustment. 展开更多
关键词 primary distribution labor share bargaining power of labor
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