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41.
克劳塞维茨的《战争论》是资产阶级军事理论的经典著作。本文从《战争论》一书有关战争活动与地理因素之间关系的论述入手,考察了作者的军事地理思想。 相似文献
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城乡一体化战略思想的形成和确立,是十六大以来以胡锦涛同志为总书记的党中央推进理论创新取得的重大成果。这一战略思想的形成和确立,既有理论渊源,又有实践基础,是伴随着十六欠以来科学发展的推进,通过对城乡关系认识的不断深化而实现的,其形成和确立具有重大的理论和实践意义。 相似文献
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The goal of this article is to understand the multidisciplinary field of public affairs. Based on data and text mining on the profiles and publications of all faculty members from a list of research‐oriented U.S. public affairs programs, we describe the landscape of public affairs schools and scholars, identify 15 topics in public affairs research and discuss their trends of change between 1986 and 2015, and show the clustering and hiring networks of public affairs schools. Our results suggest a broader approach to understanding the field of public affairs than the public administration focus in the literature. Although public administration is highly visible in the field, which is evidenced by the journals most favored by public affair scholars, various specific policy areas (such as health, social, urban, environmental, global, and education policies) show strong representations based on our topical analysis of public affairs research. 相似文献
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The literature is replete with acknowledgments that spatial autocorrelation (SA) inflates the variance of a random variable (RV), and that it also may alter other RV distributional properties. In most studies, impacts of SA have been examined only for the three most commonly used distributions: the normal, Poisson (and its negative binomial counterpart), and binomial distributions; much less is known about its effects on two other RVs that are utilized in GIScience research: the beta and the multinomial. The beta distribution—which is considered to be very flexible because it can mimic a uniform, exponential, sinusoidal, and normal RV—can be utilized to analyze the radiance of a remotely sensed image, for example. The multinomial distribution, a generalization of the binomial distribution, has been widely used for land use classification, and to describe land use change. The literature also suggests that RV impacts of negative SA, a neglected topic in spatial analysis, may differ from those of positive SA, at least for some RVs (e.g., the Poisson RV). The purpose of this article is to extend the investigation of effects of SA to beta and multinomial RVs, with both positive SA and negative SA assessed and contrasted with each other, using simulation experiments. The simulation experiments are designed to support this assessment. One of the major discoveries is that impacts of positive SA and negative SA behave similarly when a RV conforms to a normal distribution; however, maximum negative SA is unable to materialize for asymmetric RV, whereas positive SA always converges upon its maximum. 相似文献
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大古界遗址位于陕西榆林市横山县雷龙湾乡沙峁村张油坊组,2010年发掘时出土了大量的动物遗存。按照出土单位对所有的动物骨骼进行了科学的收集以及分类、测量和鉴定。通过系统的分类和研究表明至少代表12个属种,包括蚌类、喜鹊、鹤、草兔、狗、貉、狗獾、黄鼬、猪、鹿科、狍、绵羊等。根据对出土动物骨骼的分析结果表明:当时遗址周围的环境以草原为主,不远处有一定面积的疏林、灌丛,草原、疏林间分布着一定面积的水域。家养动物猪和狗占的比例较少,主要以捕猎野生动物野兔和狍子为肉食来源。 相似文献
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Lan Anh Hoang 《Social & Cultural Geography》2013,14(5):419-434
This paper examines the gender aspect of migrant networks, particularly the different ways networks are expected to assist men's or women's migration during migration decision-making processes. Through the case study of a farming community in Northern Vietnam, it shows that migrant networks are not gender neutral and, more importantly, men and women capitalise on different functions of networks to facilitate their migratory endeavours. Whilst men tend to be connected to relatively more extended networks primarily for practical support, women are more likely to be tied to family networks, which provide them with not just information and practical support but also social protection. These gender-specific expectations and uses of migrant networks have important implications for men's and women's mobility. The paper provides new insights into the way migration choices are made by men and women and at the same time underscores the importance of understanding migrant networks in researching migration. 相似文献