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我国竞争性能源之间替代效应的分析 被引量:2
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作者 严奇 何建敏 郭建平 《动力工程》 EI CSCD 北大核心 2006年第4期592-594,603,共4页
建立了向量自回归(VAR)技术的模型,通过脉冲响应函数分析,探讨了我国竞争性能源之间的替代效应。研究发现,煤炭和电力之间存在显著的替代效应,而其它竞争性能源形式之间不存在替代效应,并对这一结论做了解释。
关键词 能源工程 竞争性能源 脉冲响应函数 替代效应 电力短缺
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浅论构建能源竞争性市场的法律路径
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作者 卢沐萱 《北京政法职业学院学报》 2016年第2期9-13,共5页
中国能源市场面临的首要问题就是需要构建能源竞争性市场,以期为未来实现能源发展的最终目标铺平道路。竞争意味着存在合格的产业组织和多元的产权主体,因此,国有企业需要改革升级,民营企业应当被大力引进能源市场。在政治和经济的博弈... 中国能源市场面临的首要问题就是需要构建能源竞争性市场,以期为未来实现能源发展的最终目标铺平道路。竞争意味着存在合格的产业组织和多元的产权主体,因此,国有企业需要改革升级,民营企业应当被大力引进能源市场。在政治和经济的博弈中,能源法律制度为这个竞争性市场提供了一把保护伞。 展开更多
关键词 能源竞争性市场 管制与市场 能源
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The role of male contest competition over mates in speciation 被引量:10
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作者 Anna QVARNSTROM Niclas VALLIN Andreas RUDH 《Current Zoology》 SCIE CAS CSCD 2012年第3期493-509,共17页
Research on the role of sexual selection in the speciation process largely focuses on the diversifying role of mate choice. In particular, much attention has been drawn to the fact that population divergence in mate c... Research on the role of sexual selection in the speciation process largely focuses on the diversifying role of mate choice. In particular, much attention has been drawn to the fact that population divergence in mate choice and in the male traits subject to choice directly can lead to assortative mating. However, male contest competition over mates also constitutes an important mechanism of sexual selection. We review recent empirical studies and argue that sexual selection through male contest competition can affect speciation in ways other than mate choice. For example, biases in aggression towards similar competitors can lead to disruptive and negative frequency-dependent selection on the traits used in contest competition in a similar way as competition for other types of limited resources. Moreover, male contest abilities often trade-off against other abilities such as parasite resistance, protection against predators and general stress tolerance. Populations experiencing different ecological condi- tions should therefore quickly diverge non-randomly in a number of traits including male contest abilities. In resource based breeding systems, a feedback loop between competitive ability and habitat use may lead to further population divergence. We discuss how population divergence in traits used in male contest competition can lead to the build up of reproductive isolation through a number of different pathways. Our main conclusion is that the role of male contest competition in speciation remains largely scientifically unexplored [Current Zoology 58 (3): 493-509, 2012]. 展开更多
关键词 Male-male competition Sexual selection SPECIATION Resource based breeding systems Contest competition Population divergence Reproductive isolation
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