两部制电价下电力市场系统动力学仿真

由于国内外对两部制电价的实施效果存在不少分歧,借助Powersim软件构建了两部制电价下电力市场长期分析的系统动力学模型,模拟分析了电力市场长期发展的因素及其相互作用.结果表明,电量电价呈现出周期性波动趋势,容量电价呈现"U"形变动趋势.这意味着,《上网电价管理暂行办法》制定的两部制电价下,发电容量投资速度相对放缓,但未出现不足,也未出现投资过剩,不过申请建设周期、容量电价调整申请批复周期等延迟效果的存在却造成了一定的投资波动现象.同时,模拟分析结果还表明,水电参与竞价上网亟需研究设计合理的交易方式.     

主从型Bertrand价格博弈模型及其动力学分析

基于有限理性策略与适应性策略,构建两寡头企业主从型Bertrand价格博弈模型,并研究该模型的动力学性质。理论分析表明,该模型有一个不稳定的边界不动点和一个局部稳定的纳什平衡点。计算实验证实,采用有限理性策略的企业的价格调整速度较大时会引起两企业价格演化的倍周期分岔现象,并最终导致价格演化的混沌行为。保持较低的价格调节速度,获取纳什均衡利润是两寡头企业价格博弈的最优结果。     

基于知识传播的集群聚集能力系统动力学研究

针对产业集群对知识传播和扩散的促进作用,以及知识传播对集群聚集能力的反作用问题,基于知识传播的基本理论,从集群内企业的组织相近性和认知相近性出发,分析知识传播机制和影响集群聚集能力的因素,在此基础上,建立了系统动力学模型,利用VENSIM软件模拟小规模集群因内部企业单方面或多方面相近程度不同导致不同程度的集群聚集能力的情况,证明了为促进小规模集群的有效发展应合理选择进入组织并强调综合治理多方协调的重要性,并提出集群发展战略的制定重点.     

中国股票市场混沌动力学预测模型

运用混沌动力系统理论对中国股票市场的上证综合指数、深证成分指数进行了初步的分析,表明上证综合指数、深证成分指数两个序列是由高维的混沌系统所产生.并对上证综合指数、深证成分指数两序列建模预测,结果表明,新预测模型比均值模型的预测效果好.     

系统动力学模型的进化

系统动力学模型用结构展现系统行为，因此，系统动力学的重点是发现结构。但是，以一种固定不变的结构表现复杂的社会系统，是很粗糙的。本文讨论系统动力学模型的进化问题，即建立模型的染色体，模型的有性繁殖，以及通过选择获得适应力强的个体，最终达到适应变化着的环境的目的。     

基于系统动力学的建筑市场信用系统

由于我国建筑市场信用制度缺失,导致信用关系的严重扭曲和大量的道德风险行为。运用系统动力学理论,借助计算机仿真分析,对建筑市场信用系统的构成、内在机理及相互之间的关系进行深入研究。得出以下结论:(1)社会信用水平、行业政策完善程度、信用意识对建筑市场信用系统起正反馈作用;(2)由于信用成本和监管成本的存在,建筑市场信用水平的提高受到限制;(3)业主拖欠工程款对建筑市场信用起明显负反馈作用,且引起一系列连锁反应;(4)建筑市场信用是各信用主体信用行为的综合表现,但各信用主体对建筑市场信用的影响大小是不相同的,其敏感性排序为:政府信用、业主信用、中介机构信用和承包商信用。     

灰色系统理论在T-501市场需求预测中的应用

对 T-50 1市场需求的预测 ,以前一直是在市场分析的基础上 ,采用经理评判法、专家预测法、市场调查法等定性方法进行预测 .本文尝试采用灰色系统的理论 ,建立 GM( 1 ,1 )预测模型 ,并用残差检验、关联度检验、后验差检验等方法验证了模型的正确性 ,对 T-50 1今后几年市场需求量作出了合理预测.     

影响需求增加的市场因素分析与扩大内需的对策

针对我国扩大内需效果不佳问题,运用商品市场价格的有关理论,讨论影响需求增加的市场因素,提出增强扩大内需的相应对策。     

The Impact of Population Aging on Housing Demand in China Based on System Dynamics

In recent years, the proportion of China's elderly population is gradually increasing, and the real estate market is changing dramatically. Consequently the impact of population aging on housing demand has become increasingly prominent. On the theoretical basis of the relationship between population aging, family structure and housing demand, this paper firstly constructs a system dynamics model of the impact of population aging and family structure on housing demand in China. Then,the model is simulated, and several scenarios of population, family structure, and real estate policies are set up. The main conclusions of this paper are as follows: China's population will rise at first and then decrease, reaching a peak of 1.401 billion by 2023. As the proportion of elderly population increases, the degree of population aging is becoming increasingly serious. The size of the family will gradually shrink to 2.39 people per household in 2050. The housing demand will increase first and then decrease. Through the results of scenario simulation, this paper puts forward the following suggestion to effectively balance the housing demand in China: Completely relaxing family planning policies,imposing a real estate tax, canceling the pre-sale policy, and raising the loan rate.     

System Dynamics Model of Financial and Monetary Mechanism

System dynamics model of financial and monetary mechanism are established on thebasic of qualitative research in financial and monetary theory,by applying system dynamics to finan-cial and monetary law of movement,development and change in economic system and simulating thislaw.With it,we can analyse the interrelations between finance and banking;analyse the quantityof money demanded by the economic system,determine the most desirable quantity of money de-     

Using the Viable Systems Model to Structure a System Dynamics Mapping and Modeling Project for the Australian Taxation Office

This paper is a case study of a major System Dynamics (SD) intervention in policy design in the Australian Taxation Office. The project, which lasted two years, tested a number of hypotheses regarding the application of Stafford Beer's Viable Systems Model (VSM) to the structure and process of the project. The paper reports that the success of the VSM within the ATO was qualified by political changes in the external environment.     

Design Rules for Intranets According to the Viable System Model

The Viable System Model, VSM, by Stafford Beer is a model used for diagnosing and designing organizational structure and communication to facilitate necessary and sufficient conditions for viability. The model has been used for diagnosing different kinds of organizations at different levels where its use highlights existing or missing communication patterns and information flows in different communication channels and relates findings to a viable system. In a previous article, VSM and Intranet have been discussed and examples of advantages of combining the two concepts when designing organizations, has been given. In this article, VSM is combined with Intranet and possible functions in an intranet that support information exchange between different systems are identified and described. The suggested functions identified in this article are finally related to Intranet use modes, and the concepts of Empowerment vs. control.     

模型直升机航向系统辨识中的加权判据

在进行模型立升机航向运动的系统辨识时，由于人工操纵对实验数据影响，需要使用多次实验数据进行系统辨识。为增强实验数据中所包含的动力学信息，并减少被噪声破坏的数据对系统辨识结果的影响，采用了带有加权判据的最小二乘参数估计方法。在计算加权判据中的权值因子时，采用了单个神经元对权值进行自动分配。辨识结果表明，基于带有加权判据的最小二乘方法所得的航向动力学模型能较好地吻合实际的航向输出。该方法亦是处理多次实验数据的一种有效方法。     

利用“SD”仿真模型分析综采工作面生产系统

利用系统动力学理论,对影响综采工作面生产的主要因素进行因果关系分析,并在此基础上建立起综采工作面生产系统的“ＳＤ”仿真模型,以实现综采工作面生产系统的模拟分析.     

Cost and Service-Level-Based Model for a Seru Production System Formation Problem with Uncertain Demand

With increasing demand diversification and short product lifecycles, industries now encounter challenges of demand uncertainty. The Japanese seru production system has received increased attention owing to its high efficiency and flexibility. In this paper, the problem of seru production system formation under uncertain demand is researched. A multi-objective optimization model for a seru production system formation problem is developed to minimize the cost and maximize the service level of the system. The purpose of this paper is to formulate a robust production system that can respond efficiently to the stochastic demand. Sample average approximation (SAA) is used to approximate the expected objective of the stochastic programming. The non-dominated sorting genetic algorithm II (NSGA-II) is improved to solve the multi-objective optimization model. Numerical experiments are conducted to test the tradeoff between cost and service level, and how the performance of the seru production system varies with the number of product types, mean and deviation of product volume, and skill-level-based cost.     

市场需求Logit组合预测的研究

首先阐述了网络市场营销和传统市场营销的区别，分析了在该环境下市场需求的变化和相应的特点。其次，研究了一种利于计算机建模的市场需求组合预测方法，即采用Logit回归法训练数据的市场需求组合预测模型。最后，将该方法用于家用电冰箱市场需求趋势预测的示例研究，采用信息熵的方法，检验了组合预测模型的预测效果。实例表明，该方法可以通过调整组合权重提高预测精度。     

空防对抗仿真的系统动力学模型研究

空袭与防空的对抗是信息化条件下敌对双方对抗的主要形式,利用系统动力学(SD)理论通过作战模拟的方法进行空防对抗的研究是一种有效的途径.给出了空防对抗的SD模型框架,分析了空防对抗中要素的影响关系,基于一定的研究目的建立了空防对抗SD模型,进行了模型的仿真实验及结果分析,揭示了信息要素在空防对抗中的重要作用.建模案例表明了SD理论研究空防对抗问题的可行性和有效性.     

水权交易机制及博弈模型研究

针对水权交易市场最常见的买卖双方具有多人的双边交易形式,引入双边拍卖交易模式.首先给出水权拍卖交易过程,建立了不完全信息下的水权交易双方叫价拍卖的贝叶斯博弈模型;设计了水权交易双方叫价拍卖的机制,给出拍卖规则和市场出清规则,给出的机制满足有效性和激励相容性.     

滇池流域可持续发展投入产出系统动力学模型

根据包含了污染排放及治理、水资源使用等数据的昆明市环境保护投入产出表 ,建立了一个系统动力学模型 ,该模型可用来仿真滇池流域环境经济的相互影响关系及发展规律 ,结合经济、环境、资源管理者的经验 ,通过反复模拟寻求合理的发展及污染治理水平 .所得结论有助于制订“十五”期间滇池流域可持续发展规划 .     

以复杂适应系统理论探析企业信息系统项目风险

为了规避企业信息系统项目中的风险，达到提高信息系统项目成功的目的，通过界定企业信息系统项目失败的确切含义以及风险的定义，来识别企业信息系统项目中存在的风险，并试图利用复杂适应系统理论来分析这些风险之间存在的复杂关系，以及可以采取的策略和风险管理过程。为企业信息系统项目风险管理的思维方法提供一种探索。