大跨度空间结构预防性监测技术及其发展趋势

文章简述了大跨度空间结构预防性监测的现状与目的,并就现代监测技术及其发展趋势进行了论述。     

Type space on a purely measurable parameter space

Summary. Several game theoretical topics require the analysis of hierarchical beliefs, particularly in incomplete information situations. For the problem of incomplete information, Harsányi suggested the concept of the type space. Later Mertens and Zamir gave a construction of such a type space under topological assumptions imposed on the parameter space. The topological assumptions were weakened by Heifetz, and by Brandenburger & Dekel. In this paper we show that at very natural assumptions upon the structure of the beliefs, the universal type space does exist. We construct a universal type space, which employs purely a measurable parameter space structure.Received: 12 August 2002, Revised: 1 March 2004, JEL Classification Numbers: C70, C79, D80, D82.Miklós Pintér: The author wishes to thank Péter Tallos, Tamás Solymosi, and an anonymous referee for their suggestions and comments. This work was supported by OTKA grant T046194.     

论旅游景区几种戏剧表演空间范式

戏剧表演空间可以理解为戏剧行动发生的地方，即剧院剧场或者除房间界限的剧场形式。从“正统戏剧”剧院剧场形式的空间之外，属于谢克纳所说“环境戏剧”表演空间出发，探讨我国旅游景区存在的埃及式、希腊式、巴厘式等几种戏剧表演空间范式．     

秩幂等矩阵的特征

如果n阶方阵A满足秩(A2)=秩(A),那么称A为秩幂等矩阵.利用线性代数的方法研究秩幂等矩阵的性质,得到了秩幂等矩阵的一些充要条件,揭示了秩幂等矩阵A的值域、核子空间与线性空间Pn的联系.     

固定形式印刷品广告发展现状及趋势

在我国固定形式印刷品广告的发展基本上可分为两个阶段：一是兴起阶段。二是发展阶段。无论是兴起阶段还是发展阶段。固定形式印刷品广告都呈现出良好的发展前景，但也存在不少问题。固定形式印刷品广告低廉的成本及极强的针对性、亲切感和真实性，必将受到企业经营者的青睐，具有一定的市场发展空间和生存环境。     

基于TMS320LF2407A的SVPWM控制技术

电压空间矢量脉宽调制(SVPWM)算法谐波小,电压利用率高,是一种先进的调制方法.在TI的电机控制芯片TMS320LF2407A上产生SVPWM具有结构简单、稳定可靠、成本低廉等优点.在分析SVPWM基本原理的基础上,介绍了TMS320LF2407A芯片产生SVPWM的硬件结构和软件实现方法.     

"意境美"在中国现代雕塑陶艺中的运用

"意境"是中华民族在长期艺术实践中形成的一种审美理想。它的表现需要借助于基础造型元素线条、块、面、空间关系及写意手法的运用。文章重点从线、面、空间创作方法和写意的表现手法论述意境在中国现代雕塑陶艺中的运用,从而论证意境在艺术表现中的重要性。     

Modelling & Controlling Monetary and Economic Identities with Constrained State Space Models

The paper presents a method for modelling and controlling time series with identity structures. The approach is presented in the context of monetary targeting where the monetary identity (e.g. reserve money equals net foreign assets plus domestic credit) is modelled using a constrained state space model and next‐period changes in domestic credit (policy variable) are estimated to reach the target level of reserve money. The constrained modelling ensures that aggregation and identity relations among items are dynamically satisfied during estimation, leading to more accurate forecasting and targeting. Applications to Germany, UK and USA show that the constrained state space model provides significant improvements in targeting and forecasting performance over the AR(1) benchmark and the unconstrained model. Reduction in the mean square error of targeting over AR(1) is in the range of 76–95% for the three countries while the gain in targeting efficiency over unconstrained modelling is between 21% and 55%. Beyond monetary targeting, the method has wide application to the dynamic modelling and control of economic and financial time series with identity and aggregation constraints (e.g. balance of payment, national income, purchasing power parity, company balance sheet).     

浅析块状经济面临的困境及发展策略

块状经济是当前中国地方经济发展的一大特色,也是浙江模式的主要内涵之一。本文以部分浙江块状经济为例,分析了块状经济目前遭遇的发展瓶颈,继而从政府与企业两个层面提出了后续发展的相关策略。     

浅议地理信息系统与空间数据库建设

文章阐述了在地理信息系统建设过程中,地图数据库、空间数据库的作用与差别。针对我国现阶段地理信息系统建设的现状,分析了现阶段同时建立与维护空间数据库与地图数据库的必要性。指出了随着空间数据库技术的发展,空间数据库最终将取代地图数据库,同时提供多比例尺地图服务及各种时空尺度的地理信息服务。