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ABSTRACT. Real variable analysis has een used to great benefit in a variety of classical problems in location theory. In this paper we explore basic complex variable techniques in one formulation of the obnoxious location problem. A general definition of center points is first given and used to formulate several alternate versions of the obnoxious location problem. A logarithmic transformation is then used to demonstrate some equivalences between these families of distinct location problems (defined via center points). A prototype logarithmic potential function which results from this formulation is then investigated, and it is demonstrated that the extremal solutions with this objective reside on the boundary of its domain of definition. An application using zero- and one-dimensional centers is discussed, and a generalization to the spatial obnoxious problem is also briefly examined. We define a zero-dimensional center as a critical point of the logarithmic potential function, and it is shown that these centers are equivalent to the solutions of the Complex Moment Problem. 相似文献
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我国旅游门票研究综述 总被引:4,自引:0,他引:4
景区门票是旅游区的"入场券",在以观光旅游为主的中国旅游业中一直占据着重要的地位。我国学术界对景区门票的研究始于20世纪90年代。近年来,随着景区门票的涨价逐渐成为研究的热点。文章通过对该领域相关成果的系统梳理,着重从景区门票的制作、景区门票的价格、景区门票的营销与管理、景区门票的功能等方面对这些成果进行分析和评述。 相似文献
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Victor L. Mote 《Eurasian Geography and Economics》2013,54(6):625-632
A meeting of the Advisory Panel on a major research project entitled “Soviet Environmental Policies and Practices: Most Critical Investment Priorities” was convened in Glasgow, Scotland on March 12 and 13, 1988. More than a dozen specialists from Britain, West Germany, and the United States participated. The meeting was hosted by the Institute of Soviet and East European Studies of Glasgow University. The results are summarized below. 相似文献
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20世纪六、七十年代,在第二次女性主义运动的影响下,女性主义思潮与人文地理学研究相结合,致力于揭示和消除"男造环境"中的性别歧视,尤其是女性在空间和地方使用上面临的种种限制,从而开始了女性主义地理学的发展。本文对国外近几十年来女性主义地理学研究进行系统回顾,探究这一学科兴起的具体学术渊源,分析和评价它的主要的研究路径和成果。论文最后从三个方面展望在当下中国发展这一学术领域的前景,认为它将会有助于:①拓展性别分析的交叉性;②实践女性主义知识生产的位置理论;③为性别主流化提供政策依据。 相似文献
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