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系统动力学模型在城市群发展规划中的应用 总被引:1,自引:0,他引:1
着眼于城市群发展系统的复杂动态关系,建立了包含城市群经济增长和城市群空间结构特征的系统动力学模型.通过数据仿真研究城市群经济增长与城市群空间结构演化之间的关系,并调整政策变量集合得到3种城市群空间结构演化模式,比较发现,空间结构呈现位序一规模分形分布的城市群空间结构演化模式最利于促进城市群经济增长,而且投资、城市间相互作用和城市群创新能力对城市群经济增长起重要作用.城市群发展规划中应防止城市群空间结构分形特征退化,并且增强城市间相互作用和城市群创新能力以促进城市群健康发展. 相似文献
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河南省各地市经济发展水平评价 总被引:2,自引:0,他引:2
采用TOPSIS法,选取了15个反映地区经济发展水平的人均指标,以客观赋权法对各指标赋予权重,对河南省18地市的经济发展状况进行了评价。同另外两种方法——灰色定权聚类和主成分分析法的评价结果进行了比较,得出河南各地区经济发展不平衡、地区差异较大的结论。在今后制定政策时,要力争实现区域均衡发展,缩小地区差异。表2,参9。 相似文献
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电路诊断技术的新发展 总被引:8,自引:0,他引:8
本文分析了目前电路诊断技术研究的现状,综合评述了最新的发展方向和趋势。首先论述了诊断理论体系完善的必然性,然后介绍人工智能、模糊数学和人工神经网络技术在电路诊断中的应用,最后分析了基于模型故障诊断的研究情况。 相似文献
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Jonny Geidne Karin Fr?ding Stig Montin Charli Eriksson 《Systemic Practice and Action Research》2012,25(4):305-322
The last decades have seen the emergence of the settings approach in Health Promotion one example is the Healthy City initiative which was launched by European division of WHO in 1990. In 2003, four Swedish municipalities accordingly signed a contract on a Partnership for Sustainable Welfare Development. One of the objectives was to promote participation, influence, and health at a neighbourhood level by focusing on one housing area in each municipality. These housing areas constitute the setting of this study. The purpose is to examine the implementation structures in the municipalities, and how variations in the implementation structure affect differences in integration of community participation. A triangulation of methods was used in building up a case study database: semi-structured key informant interviews with 29 stakeholders in the municipalities; examination of solicited and unsolicited documents; and participatory observations which included repeated visits to the neighbourhoods. The results show that the greater the visibility of community participation policy is in the implementation structure the greater is the integration of community participation in the neighbourhood renewal work. Two explanatory factors have been identified. The first is that making the community participation policy visible in the implementation structure results in more appropriate strategies for mobilizing the community in the neighbourhood renewal work. The second is that the municipal governing of the neighbourhood renewal allows more space for community participation when the policy is visible in the implementation structure. 相似文献
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ZHOU Xuejun ZHONG Ziran CHEN Bingyan ZHOU Qiumo GUI Jingshe ZHU Guangshu ZHANG Xinqiang CHEN Shaohui Institute of Planning Design for Chemical Mines Ministry of Chemical Industry 《系统科学与系统工程学报(英文版)》1992,(1)
This paper, based on the study results of a subproject under the Seventh Fiveyear-plan National Major Scientific and Technological Research Project, will concentrate on the application of the mixed integer goal programming in the studies on the optimization and comprehensive evaluation of investment decision and production planning in Yichang phosphate rock district in Hubei Province and in Dianchi district in Yunnan Province. The optimization models for mineral district development planning system are formulated through system analysis. A microcomputer software based on the combination of mixed integer programming and goal programming is developed to continuously implement the calculation for the mathematical model with arbitrary objective priority levels and for a group of such models. And a system economic evaluation model is developed to measure the profitability of optimal planning system scenarios. Finally, a large amount of output information are provided for the reference of decision makers. 相似文献
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Uncertainty is a main source of opportunistic behaviors in research and development co-operations,which challenges strategic decisions ranging from investments ... 相似文献
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Heterogeneous community entails a number of social groups that adopt similar/different social norms. In such community, new individuals who join a new social group should be able to decide with which group they could assimilate based on their capabilities/values/manners. Otherwise, they would be penalized by other members in the group for violating some norms which they cannot comply.Using this approach, software agents would have better reasoning in simulating human society. In this paper, the authors propose a norms assimilation theory, in which a new agent attempts to assimilate with a social group's norms. This theory builds an approach to norm assimilation, analyzes the cases for an agent to decide to assimilate with a social group and develops a mathematical model to measure the assimilation cost and the agent's ability. The approach is developed based on the agent's internal belief about its ability and desire, and its external belief about the cost of assimilating with a number of social groups. The significance of this research is two-fold. Firstly, the study paves the way to future design of intelligent systems, i.e., software agents or robots, to closely mimic human social interactions.Secondly, the norm assimilation using agent-based system could be potentially utilized to simulate some social issues such as immigrants, new students, expatriate etc. The experiments that have been conducted demonstrate that an agent in the domain is able to calculate the assimilation cost and decide which social group to join. 相似文献
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许静波 《农业系统科学与综合研究》2007,23(2):249-251,256
农村青年是我国农村的重要人力资源,成功实现社会主义新农村建设必须培养造就千千万万高素质的青年农民。这不仅是社会主义新农村建设最本质、最核心、最迫切的内容和要求,也是推进农村产业结构调整、加快农业产业化步伐、增加农民收入的重要智力和人才保障。目前中国农村青年人力资源开发的有效途径包括优先发展农村教育事业、积极建立统筹城乡劳动力市场的长效机制和努力拓展农业内部的就业空间。参7。 相似文献
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县域"三高"农业发展规划中的系统动力学仿真应用--以东源县为例 总被引:1,自引:0,他引:1
应用系统动力学理论建立了东源县"三高"农业发展规划的SD模型,对东源县1996~2010年的"三高"农业发展进行了动态仿真,依据仿真结果,制订了规划目标.表6,参4. 相似文献
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Mar��a Catalina Ram��rez Irene Bengo Riccardo Mereu Astrid Ximena Bejarano R. Juan Camilo Silva 《Systemic Practice and Action Research》2011,24(1):45-66
This paper presents a systemic methodology by which engineering is put to use in vulnerable communities through applied technological research and the main results of its application. The methodology presented corresponds to one implemented and designed by two groups of Engineers without Borders in Europe and Latin America, to integrate technical know-how with local context in communities with water problems in Colombia and the Democratic Republic of Congo. The main results of this methodology are related to the improvement of the living conditions of vulnerable groups thanks to the integration of the communities?? knowledge with engineering know-how, leading to autonomous communities and engineering professors and students learning from real life problems to enrich applied sciences. 相似文献