Analysis of Spatial Structure in the Kashgar Metropolitan Area, China

Taking metropolitan areas as space carriers has become the engine of the Chinese government in its promotion of high-quality development, and this has also become an important measure by which to balance regional development. We used Zipf’s law and the gravity model to study the urban scale distribution characteristics of the Kashgar Metropolitan Area (KMA) in this paper. We also constructed a spatial structure judgment vector for the KMA and put forward the development objectives of different circles. The findings show the following: (1) large cities have a high primacy of development, while small and medium-sized cities are underdeveloped. At present, the KMA is a concentrated monocentric-pattern metropolitan area, with Kashgar City as its core city. (2) The urban built-up area of Kashgar City is expanding to the east and south, where it has broken through the administrative boundary and become integrated with the urban built-up area of Shule County. The spatial structure characteristics of the KMA have been further clarified. The KMA forms three circles: core, middle, and outer. (3) Tumxuk City, Bachu County, Yecheng County, Shache County, and other counties are far from the core city and cannot be connected with Kashgar, but they are closely related to the surrounding cities, forming the Bachu–Tumxuk Urban Group and the Shache–Zepu–Yecheng Urban Group. This study contributes to the understanding of the characteristics of urban scale distribution and the spatial structure of metropolitan areas in arid regions, as well as providing guidance for the formulation of policies for the development of different circles in the KMA

Photothermal Synergic Cross-Linking Hole Transport Layer for Highly Efficient RGB QLEDs

Developing an insoluble cross-linkable hole transport layer (HTL) plays an important role for solution-processed quantum dots light-emitting diodes (QLEDs) to fabricate a multilayer device with separated quantum dots layers and HTLs. In this work, a facile photothermal synergic cross-linking strategy is simultaneous annealing and UV irradiation to form the high-quality cross-linked film as the HTL without any photoinitiator, which efficiently reduces the cross-linking temperature to the low temperature of 130 °C and enhances the hole mobility of the 3-vinyl-9-{4-[4-(3-vinylcarbazol-9-yl)phenyl]phenyl}carbazole (CBP-V) thin films. The obtained high-quality cross-linked CBP-V films exhibited smooth morphology, excellent solvent resistance, and high mobility. Moreover, the high-performance red, green, and blue (RGB) QLEDs are successfully fabricated by using the photothermal synergic cross-linked HTLs, which achieved the maximum external quantum efficiency of 25.69, 24.42, and 16.51%, respectively. This work presents a strategy of using the photothermal synergic cross-linked HTLs for fabrication of high-performance QLEDs and advancing their related device applications

中国战略性新兴产业发展支撑条件空间分异研究/Evaluation on the support conditions and spatial disparity of strategic emerging industries in China[J]

从资源环境支撑、社会经济支撑、科技创新支撑、政策体制支撑四个方面构建了战略性新兴产业评价指标体系,选取了中国286个地级市研究我国战略性新兴产业发展支撑条件空间分异特征.提出我国战略性新兴产业要分阶段、有层次和集群式的发展策略,为今后我国战略性新兴产业发展布局提供参考

天山北坡城市群城市多维生态位研究/Study on urban multidimensional niche of urban agglomeration on northern slope of Tianshan Mountains[J]

以新疆天山北坡城市群中10个城市为研究对象,选取16个指标,采用主成分分析方法、城市生态位宽度模型和分异指数模型,测度分析该城市群的生态位宽度和生态位分异特征.研究表明,天山北坡城市群中首位城市生态位宽度较大,多数城市综合生态位宽度偏小,两极分化明显.综合生态位分异指数呈现先降后升的态势,区域发展要素向区域中心城市集聚,且集聚效应不断增强.因子生态位宽度测度中,经济和公共服务因子生态位宽度差异最大,城市基础设施因子生态位宽度差异较小.经济和公共服务因子、公平发展与人口增长因子生态位分异指数呈上升趋势,城市基础设施因子反之.提出了天山北坡城市群协同发展的建议

基于DEA的新疆城市化效率研究/A Study of Urbanization Efficiency in Xinjiang Based on DEA Model[J]

城市化水平是衡量一个国家或地区经济发展的重要标志,近年来中国的城市化进程不断加速,但仍处于高投入、低产出的发展模式.本文利用DEA和Malmquist指数模型方法,对1991年-2011年新疆15个地州的城市化效率及其变化情况进行了分析.结果表明,新疆城市化效率总体上未达到理想状态,呈现先上升后下降的趋势.其下降的主要原因是处于规模报酬递增状态的地区数量不断增加、技术变动的无效率和规模过小.从整体来看,新疆各地州城市化过程中所投入的各种要素的非集约度都较高,新疆整体的城市化仍旧依靠扩张投入要素的粗放型增长方式