精英克隆局部搜索的多目标动态环境经济调度差分进化算法

为有效解决复杂多目标动态环境经济调度问题,提出一种基于精英克隆局部搜索的多目标动态环境经济调度差分进化算法.以传统的差分进化(differential evolution,DE)算法为框架,为了提高DE算法的开采和探索能力,增设精英群的克隆和突变机制,采用动态选择方式确定精英群,有效增强算法的全局搜索能力.数值试验以I...     

权力的文化网络视角下的新乡贤返乡困境及对策——基于H省G村的调查和实验

借用杜赞奇权力的文化网络理论视角,结合H省G村的调查和实验,分析和解释新乡贤返乡过程中面临的困境。文章认为,社会背景影响及新乡贤返乡引发的乡村文化网络中,旧象征符号的弱化及异化,新象征符号的产生及扩张,造成了权力失衡的状况,即:乡村文化网络权威多元化、权力博弈以及原子化乡村受权威影响的不确定性。文章借用G村的乡村建设实验提出了文化、政治、经济三方面的对策:"再解释"文化象征符号、"合法化"新乡贤身份、培养集体经济主体。以期为新乡贤融入乡村建设,重塑乡村文化网络提供建议。     

协同进化混合蛙跳算法

针对基本混合蛙跳算法收敛速度慢、求解精度低且易陷入局部最优的问题,提出了一种新的协同进化混合蛙跳算法。该算法在局部搜索策略中,对子群内最差个体的更新引入平均值的同时充分利用最优个体的优秀基因,可有效扩大搜索空间,增加种群的多样性;同时对子群内少量的较差青蛙采取交互学习策略向邻近子群的最优个体交流学习,增加子群间交互的频繁性,提高信息共享程度,有利于进化。在全局迭代过程中采取精英群自学习进化机制,以对精英空间进行精细搜索,获得更优解,进一步提升算法的全局寻优能力,正确导向算法的进化。实验结果表明,所提算法在七个测试函数中均能收敛到最优解0,成功率为100%,优于其他对比算法。所提算法可有效避免陷入早熟收敛,极大地提高了算法的收敛速度和优化精度。     

当代民族文化变迁中文化选择的外部动因

交通业和信息技术的飞速发展打破了化传播交流的原有节奏和时空限制。当代社会，客观存在的异质化体系以及行政力量和丈化精英逐渐参与到丈化变迁的进程中并发挥着越来越重要的作用；一方面，面临艰难抉择的丈化主体需要由此获得契机和指导，另一方面，所有外部因素的介入必须以尊重丈化主体独立的化人格和化尊严为前提。     

Biogeography-based particle swarm optimization with fuzzy elitism and its applications to constrained engineering problems

In evolutionary algorithms, elites are crucial to maintain good features in solutions. However, too many elites can make the evolutionary process stagnate and cannot enhance the performance. This article employs particle swarm optimization (PSO) and biogeography-based optimization (BBO) to propose a hybrid algorithm termed biogeography-based particle swarm optimization (BPSO) which could make a large number of elites effective in searching optima. In this algorithm, the whole population is split into several subgroups; BBO is employed to search within each subgroup and PSO for the global search. Since not all the population is used in PSO, this structure overcomes the premature convergence in the original PSO. Time complexity analysis shows that the novel algorithm does not increase the time consumption. Fourteen numerical benchmarks and four engineering problems with constraints are used to test the BPSO. To better deal with constraints, a fuzzy strategy for the number of elites is investigated. The simulation results validate the feasibility and effectiveness of the proposed algorithm.     

Ottoman and Turkish Orientalism

Since the early decades of the 19th century, Turkey has undergone successive programmes of modernisation that have closely identified reform with Westernisation and its implied European ‘success and superiority’ over Turkish culture. Here Edhem Eldem reveals both the external and internal dynamic of Turkish Orientalism, which has proved such a complex multilayered process with an enduring influence on how Turkish society and elites view themselves today. Copyright © 2010 John Wiley & Sons, Ltd.     

由“村外人”到“新乡贤”的乡村治理新模式——以H省G村为例

城乡二元背景下传统村落人口外流,导致在乡村保护与发展中内生动力不足。而同时,随着城乡壁垒的弱化,一批走出去的"村外人"带着新资源,抱着乡土情怀重返故里,成为传统村落复兴的契机。本文基于乡村精英和乡村治理的"公"、"共"、"私"领域等理论基础,以传统村落H省G村为案例,深入剖析了乡村治理中"村内人"和"村外人"的互动关系,并指出回流的村外精英拓展了新的社区关系资本,具有积极作用,但同时也面临着现实困境。研究依据传统村落保护和发展的具体行动,针对性地提出解决困境的建议,包括塑造"新乡贤"文化,建立"新乡贤"议事平台,分工协作等,对创新乡村治理模式、复兴传统村落的发展建设,以及拓展乡村规划的理论视角等具有积极的意义。