厂商数目有限交易费用不同的垄断竞争的空间模型

通过放松厂商数量足够多的假设，得到了新厂商的进入会对本地市场的厂商规模、产品价格以及产品种类数产生影响的结论。模型的结果显示，克鲁格曼模型是本模型的特例。最后讨论了模型中替代弹性变化、劳动力增加以及累积循环过程所体现的特征。     

Kernel method-based fuzzy clustering algorithm

1.INTRODUCTION Clusteranalysisdividesdataintoclustersinorderto facilitateunderstandingortofindstructurehiddenin dataset.Clusteringalgorithmspartitionasetofdata objectsintoclustersorclasses,wheresimilardataob jectsareassignedtothesameclusterwhereasdissimi lardataobjectsshouldbelongtodifferentclusters. SinceZadeh(1965)presentedthefuzzysettheory, thefuzzymethodisfirstlyintroducedinclustering problems,whichiscalledthefuzzyclusteringanaly sis.Fuzzyclusteringisawidelyappliedmethodfor acquiri…     

An improved form of the ELMS algorithm

1.INTRODUCTION Adaptiveechocancellersarewidelyemployedintele conferencingsystemsinordertocompensateforthe impairmentinthequalityduotoundesiredechoesre sultingfromcouplingbetweenloudspeakerandmicro phone.Inastereophonicenvironment,thefunda mentalproblemofechocancellationisthatgiventhe inputtotheloudspeakersandtheoutputofthemicro phonesinthereceivingroom,theechopathcannot bedetermineduniquely[3,8,9].Theproblemisdueto thecorrelationbetweenthestereosignals.Asare sult,anyadaptivetechniqueusedi…     

流体网络模块化图形建模软件FLOWNET在600MW仿真机中的应用

６００ＭＷ火电机组模拟培训装置中的流体网络模块化图形建模软件包ＦＬＯＷＮＥＴ适用于任意拓扑结构的热工流体网络系统，只需把系统的网络结构以图形方式输入，便能自动生成网络模型程序。软件包界面开放，使用方便、灵活，是电站仿真建模的强有力工具     

识别箔条云新方案

箔条干扰是最常用的一种无源干扰，用来对付反舰导弹尤为有效。本文专门讨论适用于反舰导弹导引头识别箔条云的新方案。这一方案是建立在箔条云和舰艇去极化特性具有显著差异的基础上的。为此，本文首先论述箔条云的去极化特性，得出了不同分布箔条云的同极化截面积与正交极化截面积的比值，指出了即使在最不利情况下，对箔条云和对舰艇这一比值相差在６６Ｂ左右。本文提出的采用主极化天线通道和正交极化通道的１１通道信号处理方案正是利用了这一差异。本文最后对系统设计的有关问题进行了讨论。     

The impact of warrants introduction: Sign effect or magnitude effect?

The data of warrants underlying stocks was selected for the sample period from August, 2005 to December, 2009. These data the authors collected did not include the announcement date of reform of non-tradable underlying shares, and was available from Shanghai and Shenzhen stock exchanges. The event study method is employed to test the magnitude effect based on the Wild bootstrap, which is performed on the abnormal return, the cumulative abnormal return, and the standardized cumulative abnormal return. Empirical results show no evidence of magnitude effect but sign effect after warrants introduction. The authors argue that this phenomenon is caused by the migration of radical agents from stock market to warrant market.     

A new approach to model financial markets

This paper deals with the problem of how to take full use of prices information to model financial markets. A range decomposition technique is proposed to decompose the returns into two components. It is proved theoretically that these two components are bi-directional Granger causality, which makes it convenient to establish a vector autoregressive model (VAR). Both simulations and empirical studies are performed, and the results are consistent with the theoretical ones. The range decomposition approach presented in this paper is more efficient in information employment and suggests a new framework to model financial markets.     

Three aspects on solving queuing service system in Shanghai world expo

This paper analyzes the queuing problem that was experienced during the Shanghai World Expo of2010.The queuing problem will be discussed at three levels.The three levels include the physical,psychological,and social aspects of the queuing problem.The collective behavior of visitors is studied through analyzing the information from the different sources,such as,the network of electronic eyes,the evaluation platform based on mobile phone system and the Internet.A hybrid information network technology is implemented.Based on the Wuli-Shili-Renli(WSR) system methodology,a new theoretical analysis framework for the queuing problem is proposed.     

基于时间-距离-多普勒像的编队目标架次检测

针对实际编队目标在距离上的分布特性和目标多普勒频率的变化规律,利用联合时频变换代替传统傅立叶变换,建立目标时间-距离-多普勒立体像,提出一种基于立体像的目标架次检测方法。该方法不仅能给出清晰的瞬时距离-多普勒像,而且能反映目标距离-多普勒像的时间演变特性,较好地解决了目标在距离上的分布和多普勒像的模糊。实测回波数据验证了该方法的有效性,成功地实现了4架编队飞机目标的架次检测。     

Robust H∞ guaranteed cost satisfactory fault-tolerant control for discrete-time systems with quadratic D stabilizability

The problem of robust H∞ guaranteed cost satisfactory fault-tolerant control with quadratic D stabilizability against actuator failures is investigated for a class of discrete-time systems with value-bounded uncertainties existing in both the state and control input matrices. Based on a more practical and general model of actuator continuous gain failures, taking the transient property, robust behaviour on H∞ performance and quadratic cost performance requirements into consideration, sufficient conditions for the existence of satisfactory fault-tolerant controller are given and the effective design steps with constraints of multiple performance indices are provided. Meanwhile, the consistency of the regional pole index, H∞ norm-bound constraint and cost performance indices is set up for fault-tolerant control. A simulation example shows the effectiveness of the proposed method.