发达地区的乡村集镇空间扩展差异与模型研究——以锡山市为例

长江三角洲是我国经济发展最迅速、乡镇企业成长最快的地域。从1970到1998近30年的时间中,尤其是从1978到1998年,锡山市域乡村集镇发生了巨大变化,其发展经历了数量由多到少,规模由小到大的过程。数量的变化本身体现了无锡市区空间和集镇规模的扩大和功能的增强。本文首先从1970年的地形图和1984、1991、1998三年的遥感影像上提取锡山市乡村集镇的空间扩展变化信息,在地理信息系统软件中进行叠置分析,然后建立乡村集镇扩展的模型,为乡村集镇空间扩展趋势的预测、规划提供依据。论文提供了三种乡村集镇扩展的模型:线型模型、幂函数模型和指数函数模型,而幂函数模型是预测今后集镇发展规模较理想的模型。     

Explaining Third‐Party Intervention in Ethnic Conflict: Theory and Evidence

Abstract. One of the most challenging developments for students of international relations is the resurgence of ethnic strife, including secessionism and irredentism. Basic questions are only beginning to be addressed in the post‐Cold War era. Why are some states more likely than others to intervene in ethnic conflicts? How can international norms about third‐party intervention in ethnic conflicts be evaded or ignored by some states but respected by others? Why are some states inclined to use force rather than mediation to resolve ethnic strife? In short, what accounts for the emergence of adventurous and belligerent foreign policies with respect to internal ethnic conflicts? These questions are of increasing importance to students of international politics, yet the dynamics and internationalisation of ethnic conflict are far from fully understood. This study focuses on the dynamics of third‐party intervention in ethnic strife and implications for peaceful resolution. The first section presents a model that identifies the general conditions under which ethnic strife is most likely to lead to intervention by third‐party states. The second uses four cases to illustrate, within the context of the model, different processes with respect to internationalisation of ethnic conflict. The third and final stage identifies implications for policy and theory, along with directions for future research.     

省域城市网络中心性测度及比较研究——以江苏省和广东省的对比分析为例

城市网络中心性是衡量城市地位、分析城市体系的重要概念.本文在剖析中心性理论内涵的演化后,提出网络中心性应当同时体现规模等级和要素流动的水平.通过区分静态网络和联系网络,论文构建了基于规模数据和流动数据的网络中心性评价体系,并以江苏、广东为例进行实证分析.研究发现:①从规模和联系两类城市网络中心性的视角识别首位城市是有效...     

无锡市城乡系统耦合测度与耦合度变化规律研究

经济发达地区大城市城乡系统耦合程度随着国家经济社会转型而不断变化,测度城乡系统耦合(以耦合度表示)旨在揭示不同时期城乡相互作用和影响程度,从而为进一步调控城乡互动关系提供科学依据。本文以无锡市为案例,以系统科学理论为基础,构建城乡系统耦合测度模型,对无锡市1979至2008年8个时期的城乡系统耦合程度进行测度,并分析耦合度变化原因和规律。结果表明:无锡市城乡系统耦合度变化过程明显分为三个阶段,呈现拉平"S"型。在1990s初期以前耦合度较低,反映城乡系统较为独立发展;1990s初期以后耦合度快速提高,城乡互动关系加强;进入21世纪耦合度缓慢上升趋于停滞,城市系统在持续加速发展的同时,乡村系统发展趋缓并呈下降趋势。伴随乡村系统发展速度的下降,城乡系统潜伏着二者不协调的危机,为保证其可持续发展,国家公共政策需要加强对乡村发展的扶持和引导,以促进城乡系统良性互动。     

元青花无官器

叶佩兰先生和许多专家的研究以及有关史料都证明,元代景德镇确有官窑,但始终处于时断时续的状态。这也从一个侧面说明了关于元代朝廷并不倚重瓷器的观点可以成立。     

Different glassmaking technologies in the production of Iron Age black glass from Italy and Slovakia

This study presents the results of an archaeometrical investigation performed on 75 black glass beads dated to the ninth–fifth century BC coming from Bologna, Cumae, and Pozzuoli (Italy), and Chotin (Slovakia). The analyses of the major, minor, and trace elements—as well as that of Sr and Nd isotopes performed on a selection of samples coming from Bologna—provided evidence for two different production technologies in Iron Age black glass found in Italy (natron glass, probably produced in Egypt) and Slovakia (wood ash glass, probably produced in Europe). In both cases, the glasses derive their black colouration from the high presence of iron (around 12 % FeO), introduced into the glass batches through the intentional choice of dark sands. The production model appears to be small-scale and experimental, characterised by the use of non-sorted raw materials and poorly defined formulae, producing glass with a high chemical variability. The wood ash technology appears to have dropped out of use in Europe until the Medieval period, while natron production spread quickly, becoming predominant throughout the Mediterranean.