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创设生物学信息结构图 强化长时记忆
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作者 袁毅红 《生物学教学》 北大核心 2017年第11期32-33,共2页
通过创设生物学信息结构图,包括环形脑图、问题导引式知识结构图等,将知识梳理成环状分支,直观、形象地展示知识的内在联系,构建知识框架模型,再现趣味化学习情景,可强化学生的长时记忆,提高生物学知识的学习效率。
关键词 生物学信息 信息结构图 环形脑图 导引式知识结构图 长时记忆
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一种基于熵值的装备维修性评价模型 被引量:2
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作者 柯宏发 《国防科技》 2021年第2期55-62,共8页
本文提出了一种基于熵值的装备维修性综合评价模型,该模型包括评价指标的熵值度量模型、装备维修信息结构图和行为控制图以及基于熵值的评价指标聚合模型等3个方面。本研究首先在分析装备维修一般过程和维修性评价内容的基础上,构建了... 本文提出了一种基于熵值的装备维修性综合评价模型,该模型包括评价指标的熵值度量模型、装备维修信息结构图和行为控制图以及基于熵值的评价指标聚合模型等3个方面。本研究首先在分析装备维修一般过程和维修性评价内容的基础上,构建了定性指标和定量指标相结合的装备维修性评价指标体系,分析了维修任务复杂度、维修保障复杂度和基于熵值的维修效果的涵义;其次,给出了定性指标的熵值、定量指标的熵值以及基于权值的装备维修性熵值等计算方法;最后,给出一个装备维修性熵值评价的算例。算例结果表明,所提方法能够结合综合维修任务、维修保障和维修效果等多种影响因素进行装备维修性评价,不仅可以根据熵值大小对装备维修性水平进行高低排序,还可以分析影响装备维修性水平的瓶颈因素。 展开更多
关键词 装备维修性 综合评价 信息结构图 行为控制图 定性指标 定量指标 熵值
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Development of 57 Novel Polymorphic Microsatellite Markers in Half-Smooth Tongue Sole(Cynoglossus semilaevis)
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作者 MIAO Guidong XU Ying +3 位作者 WANG Di CHEN Songlin FAN Tingjun TIAN Yongsheng 《Journal of Ocean University of China》 SCIE CAS 2011年第3期241-245,共5页
Half-smooth tongue sole (Cynoglossus semilaevis) is a promising species for aquaculture in China.The wild population of C. semilaevis is under threat from environmental factors. Microsatellite markers are very suitabl... Half-smooth tongue sole (Cynoglossus semilaevis) is a promising species for aquaculture in China.The wild population of C. semilaevis is under threat from environmental factors. Microsatellite markers are very suitable for assessing genetic diversity. Four microsatellite-enriched libraries of half smooth tongue sole (Cynoglossus semilaevis) were constructed,from which 57 polymorphic microsatellites were isolated and characterized.The polymorphism of these microsatellites was assessed by genotyping in 30 individual fish.The number of alleles ranged from 2 to 11, with an average of 4.614 alleles per locus.The values of observed and expected heterozygosities ranged from 0.1000 to 1.0000 and from 0.0966 to 0.8847 respectively. Polymorphism information content (PIC) ranged from 0.0905 to 0.862.These markers would be useful for population structure assessment,genetic linkage map construction and parentage analysis for this species. 展开更多
关键词 Cynoglossus semilaevis MICROSATELLITE polymorphic marker half-smooth tongue sole
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Research on management of coal bed methane warehousing and transportation based on GIS
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作者 LI Yong-feng ZHANG Ming-hui +1 位作者 WANG Yun-jia ZHANG Hua 《Journal of Energy and Power Engineering》 2009年第12期39-45,共7页
At present Coal Bed Methane (CBM) has become the important part of clean energy in China. and will optimize the energy structure in China unceasingly. However, warehousing and transportation of CBM become one of the... At present Coal Bed Methane (CBM) has become the important part of clean energy in China. and will optimize the energy structure in China unceasingly. However, warehousing and transportation of CBM become one of the core factors that restrain its exploitation and utilization at present, due to the space-time character of natural deposit and modem utilization of CBM. In this paper, according to the character of CBM and the expanding trend of its utilization, the necessity of constructing the CBM's warehousing and transportation management system demonstrated. Index system that influence CBM's warehousing and transportation is established. And CBM's warehousing and transportation model is established by Voronoi diagram. In light of above research, CBM's warehousing and transportation management system based on Geography Information System (GIS) is designed, Using this system, CBM's warehousing and allocation center in one mining area is optimized. Research shows that to reinforce CBM's warehousing and transportation management is one of the key factors for coordinating the development of its development and utilization, thereby ensuring its sustainable development and utilization. 展开更多
关键词 coal bed methane: warehousing and transportation: Voronoi diagram: GIS
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