Cities evolution tree and applications to predicting urban growth

China’s unprecedented urbanization and economic modernization have brought about significant growth and land use changes in cities and their surroundings. Traditional analyses of the relationship between urbanization and land use change have not fully incorporated important factors like city function or developmental stage. We define and apply a new visualization and analysis tool—an evolution tree—showing how an understanding of evolutionary pathways taken by growing cities contributes to visualization and forecasting of urban development and spatial expansion. We clustered 253 Chinese cities by type and developmental stage, arranging them in a “tree” structure, with types grouped as branches and leaf position along branches reflecting developmental stage. Urban growth rates are higher for business-oriented, manufacturing-oriented, and functionally comprehensive cities than for those oriented toward tourism. Extent of spatial growth is dominated by city type and developmental stage. Cities evolve along typical pathways, punctuated by occasional leap developments across functional types.     

协商民主有效性的认识路径:基于程序—结果的分析框架

理性是实践的基础,它在政治、行政领域表现为各种组织和制度.协商的产生和广泛应用源于从实践理性到交往理性、选择理性到有限理性的两种修正,从这两种修正中可以得出认识协商有效性的程序与结果两个维度.基于这两个维度,我国的协商实践可以分为决策型协商、解压型协商、告示型协商、谏言型协商四类.在统一框架内把握每类协商的特征和问题,是增强协商有效性的前提.     

学术界关于国家形象研究述评

随着全球化的进一步发展,国家形象在国际社会中的作用日益凸现.而学术界有关国家形象的研究也逐渐升温,其中有不少学者对国家形象的内涵、构成、特性、地位和构建等诸多问题进行了不同程度的探讨,观点纷纭,研究成果颇丰.     

Semiparametric Estimation Methods for the Accelerated Failure Time Mixture Cure Model

This paper provides an overview of two semiparametric estimation methods recently proposed in the literature for the accelerated failure time mixture cure model. We prove that the two estimation methods are asymptotically equivalent. A simulation is conducted to investigate the rate of convergence of the two methods. We apply these methods to fit the accelerated failure time mixture cure model to the survival times of leukemia patients receiving bone marrow transplantation.     

高等院校职业化教育培养要素及其差异探究

我国高等院校开展职业化教育的重要性已被国内高等教育研究者广泛关注,但缺乏职业化教育培养体系的研究。高等院校职业化教育应以职业化的评判标准为基础,其核心是职业综合素质的培养。职业素质培养是高等院校职业化教育的最终目标,职业素养培养是高等教育职业素质培养的重要环节。可以根据不同类型高等院校的学生特点和培养目标开展适宜的职业化教育。     

Optimal designs for additive mixture model with heteroscedastic errors

This paper presents a study of D- and A-optimality of direct sum designs for additive mixture models when the errors are heteroscedastic. Sufficient conditions are given so that D- and A-optimal designs for additive mixture models can be constructed from the D- and A-optimal designs for homogeneous models in sub-mixture systems.     

地下空间开发对城市环境地质的影响及保护措施浅谈

城市地下空间作为一种资源在城市发展中扮演着重要的角色。地下空间具有恒温、恒湿、抗震、防爆、绝热、封闭和可开拓性好的特点,所以开发地下空间比建造地面工程有着独特的优势,目前开发和利用地下空间已成为我国大中城市解决人口、资源、环境危机和医治“城市综合症”的重要措施,也是实施城市可持续发展的重要途径。