加拿大和美国对古巴政策的分歧

由于加拿大与美国的特殊关系 ,使得它在处理战后一些重大的国际事务时不得不与美国保持一致 ,但惟独在古巴问题上与美国相悖。美国一贯视拉美为后院 ,视古巴为共产主义在拉美的桥头堡。加拿大公开反对美国对古巴的封锁政策。古巴问题显示出加美对外政策的纠葛     

从城市地理学角度论国外城市更新历程

西方城市更新的历程演变在建筑学、城市规划学中已有一定程度的探讨。本文从城市地理学的角度对城市更新历程加以归纳和总结:(1)近代城市本身物质空间结构的更新(工业革命-19世纪末);(2)城市在"城市-区域"系统上的更新(19世纪末-1970'S);(3)"内城(中心城)"更新复兴阶段(1970'S-)。通过归纳和总结,我们可以借鉴其经验和教训。     

50年来我国城市主导功能的发展变化——从消费城市向生产城市、生活城市的转变

本文在简述城市主导功能转变规律的基础上,分析我国50a来城市主导功能从消费性向生产性转变、及目前少数大城市开始向以服务性功能为主的生活型城市转变的历程。     

基于旅游互动的背包客通用技能变化研究

通用技能也被称为通用能力,是在信息丰富的社会成为一个经验丰富的专业人才所需要的先天能力、后天能力和知识.旅游是一种非正式的学习,通过旅游互动能改变旅游者的通用技能.本文研究背包旅游者通用技能变化以说明旅游互动与通用技能变化的关系.本文通过文献、访谈,结合因子分析,完善并验证背包者旅游互动模型,将背包者旅游互动分为与环境的互动和与人的互动两种,并进一步基于旅游互动行为的特点,通过因子聚类分析,将所有样本人群分成3类.     

Body Rainbow简

<正>Chapter Eight It was almost dark when Phubu got to Tadrosa Village down the mountain.A light snowfall dusted the ground.Phubu was thinking about how to find ...     

扑满考略

我国古代民间家用储钱器具有钱罐、钱袋等,钱罐较早见文献记载,据湖北云梦睡虎地秦墓出土的秦律竹简《关市律》所记：“为作务及官府市,受钱必辄入其钱骺中,令市者见其入,不从令者赀一甲。”钱骺即为最初的储钱罐,《说文·缶部》：“缿,受钱器也,从缶,后声。古以瓦,今以竹。”而《汉书·赵广汉传》载：“又教吏为砺笛。”     

对秦兵马俑彩绘保护技术的思考与建议

秦陶俑彩绘保护是秦始皇陵保护的重点和难点。对秦兵马俑目前的现状进行全面介绍的基础上分析了损坏的原因,指出损坏是由历史、力学以及物理化学等原因共同造成。然后详细评价了PEG200和聚氨酯(PU)乳液联合处理的保护方法与单体材料渗透、电子束辐照固化(EB)的保护方法,并指出了这两种技术的优势及所存在的问题;还介绍了一些辅助加固技术并详细介绍了冷冻干燥法、盐溶液干燥法以及室温干燥法的原理和操作;之后提出了加固剂制备与陶俑保护一体化的设想、均匀场的设想以及稳定生漆层的设想。     

浅谈青海皮影戏

皮影戏的渊源及其发展关于皮影戏产生的故事两千多年前,汉武帝爱妃李夫人染疾故去,武帝思念心切,神情恍惚,终日不理朝政。大臣李少翁     

Spatial inequality and dynamics of foreign hypermarket retailers in China

The globalisation of retailing has intensified since the mid‐1990s with the rise of a group of international retailers. Foreign retailers have greatly impacted the Chinese retail market since the opening up of the retail sector in 1992. This study aims to examine spatial inequality and dynamics of foreign hypermarket retailers at different geographic scales in China. Although the relative gaps in foreign hypermarkets among Chinese regions are narrowing, the absolute gaps are widening. Logistic regression models are used to identify locational determinants of foreign retailers Carrefour, Wal‐Mart, and RT‐Mart at the intercity level. Carrefour prefers cities with larger urban district populations, longer time of being open to international retailers, and more foreign investment. While urban district populations are significant to Wal‐Mart and RT‐Mart as well, they favour cities where people have higher annual salaries and aim to achieve internal economies of scale at the provincial level. The three leading foreign retailers also have different first‐city and city size preferences in their provincial expansions.     

Impacts of Spatial Autocorrelation in Georeferenced Beta and Multinomial Random Variables

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.