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定时器周期稳定性择优
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作者 林庄 王永嘉 《哈尔滨工业大学学报》 EI CAS CSCD 北大核心 1989年第5期13-19,共7页
定时器在工业中应用甚广.其质量的优劣不仅关系机构的工作能否正常进行,而且对操作者的安全也会产生影响.如所周知,开伞器中的定时装置,便是一例.因此必须缜密考虑定时器的设计.传统的设计方法,多数是逐个选择参数,很少研究其间的优化... 定时器在工业中应用甚广.其质量的优劣不仅关系机构的工作能否正常进行,而且对操作者的安全也会产生影响.如所周知,开伞器中的定时装置,便是一例.因此必须缜密考虑定时器的设计.传统的设计方法,多数是逐个选择参数,很少研究其间的优化匹配问题.本文拟以电站用 DS-20定时器为例,运用正交设计方法,对其周期稳定性作一探讨. 展开更多
关键词 定时器 周期稳定性 选优表
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Analysis of the Evolutionary Significance of Heterosis——taking the contribution of fitness to the genetic diversity in random mating population as an example 被引量:1
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作者 李大林 陈奇 +1 位作者 林建国 蔡润 《Agricultural Science & Technology》 CAS 2009年第2期1-5,36,共6页
Upon the analogy of definition of heterosis and inbreeding depresstion in terms of population genetics, the heterosis is thought to be evaluated overall with fitness. By establishing a mathematical model, the equilibr... Upon the analogy of definition of heterosis and inbreeding depresstion in terms of population genetics, the heterosis is thought to be evaluated overall with fitness. By establishing a mathematical model, the equilibrium status of three genotypes of random mating population (i. e. RR, Rr and rr) under different fitness, which exposes that heterosis is the precondition for multiallele to exist in the population. The heterosis protects the genetic diversity and makes the population owning a stronger self-control and evolution potential by improving the hetemzygote's fithess so as not to wash out different types of genes. It deepens Darwin's thoughts of individual section by making the individual fitness consonant with population fitness. 展开更多
关键词 Random mating population FITNESS HETEROSIS Equilibrium status Evolution
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