G-政府的初步研究

政府使用的信息占整个国家或地方有效信息的85％以上，而这些信息的85％和空间定位有关，即政府使用的信息的72％与空间有关。因此以空间信息存储、分析和处理为核心功能的地理信息系统（GIS）与政府结合是必然趋势。因特网上的应用使GIS变得更强在和广泛，文章在此基础上提出了G－政府的概念，并从面向商业的政府、面向公众的政府和面向政府的政府三个方面对G－政府进行了论述，同时对G－政府实现的关键技术做了简单介绍。G－政府的应用，证明了GIS和因特网是促进政府更好发展的有效途径。G－政府的实现对于政府信息化工作具有十分重要的作用。     

GIS在邮政物流配送管理信息系统中的应用

以加强邮政物流配送管理为目的 ,通过引入地理信息系统理论 ,在总结了 GIS在邮政物流配送管理信息系统项目开发的基础上 ,研究分析了 GIS在邮政物流管理信息系统的有关核心技术问题 ,最后通过对实例的归纳和总结 ,提出了较实用的指导性方案     

CROSS‐DOCKING AND ITS IMPLICATIONS IN LOCATION‐DISTRIBUTION SYSTEMS

Cross‐docking replaces traditional warehousing, enabling continuous flow of items without storage. Here we model location‐distribution networks, that include cross‐docking facilities, to obtain the latter's impact on the supply chain. We formulate optimization models to minimize total cost in three multi‐echelon networks, each model generalizing the preceding one. The first includes a single manufacturer, one product type, and multiple customers. Cross‐docks are to be located between origin and destinations. Besides solving optimally, a tool for quantitative analysis of direct‐shipment decisions is developed. The second model considers more than one product: We determine a cost‐effective sequence of items for indirect shipment (via cross‐docks). Finally, in a network with multiple origins, optimal solutions are obtained for 40 medium‐sized and larger examples.     

The European high-speed train network: Predicted effects on accessibility patterns

The principal aim of this paper is to evaluate the impact of the future European high-speed train network on accessibility, by reducing time distance between places and modifying their relative location. We compare the current situation with that foreseen for the year 2010, according to the Outline Plan of the European High-Speed Train Network, in order to analyse which areas will most benefit from construction and improvement of the infrastructure. It is hypothesized that the high-speed train will certainly bring the peripheral regions closer to the central ones, but will also increase imbalances between the main cities and their hinterlands. A weighted average distance indicator is applied for this purpose. This measure identifies the spatial distribution of accessibility in the area of study, emphasizing the infrastructure effects, and locates accessibility changes at the European level. A Geographic Information System (GIS) has been used to carry out this study.     

采取网络型的政府市场供给模式应对房价问题

面对不断飙升的房价,从理论界到政策层面对其原因都有不同的解读,但从实践结果来看对房价的治理并不理想。本文在综合分析理论研究与国家调控政策的基础上,认为创新措施采取网络型的政府市场供给模式是解决房价过快上涨的有效途径。文章着重对这一模式进行了分析,并认为此举对缓解供需矛盾、解决市场的信息不对称、市场操控、改变预期、稳定房价等都有非常重要的作用。     

GIS在现代物流配送中应用的探讨

电子商务下的物流配送管理要求运输及时、准确,故对信息化的要求程度高.文中研究了GIS在现代物流配送中的作用,指出应用GIS对于提高现代物流配送效率是至关重要的.     

Forecasting economic time series using flexible versus fixed specification and linear versus nonlinear econometric models

Nine macroeconomic variables are forecast in a real-time scenario using a variety of flexible specification, fixed specification, linear, and nonlinear econometric models. All models are allowed to evolve through time, and our analysis focuses on model selection and performance. In the context of real-time forecasts, flexible specification models (including linear autoregressive models with exogenous variables and nonlinear artificial neural networks) appear to offer a useful and viable alternative to less flexible fixed specification linear models for a subset of the economic variables which we examine, particularly at forecast horizons greater than 1-step ahead. We speculate that one reason for this result is that the economy is evolving (rather slowly) over time. This feature cannot easily be captured by fixed specification linear models, however, and manifests itself in the form of evolving coefficient estimates. We also provide additional evidence supporting the claim that models which ‘win’ based on one model selection criterion (say a squared error measure) do not necessarily win when an alternative selection criterion is used (say a confusion rate measure), thus highlighting the importance of the particular cost function which is used by forecasters and ‘end-users’ to evaluate their models. A wide variety of different model selection criteria and statistical tests are used to illustrate our findings.     

货币政策和银行风险承担：一种非线性关系

宽松的货币政策会通过估值、收入和现金流机制,追逐收益机制以及中央银行沟通和反应机制等渠道增加银行风险承担,通过风险转移机制降低银行风险承担,从而导致货币政策与银行风险承担之间可能存在复杂的非线性关系。本文使用面板阈值模型,基于我国银行业数据研究了货币政策对银行风险承担的影响,发现我国货币政策对银行风险承担的影响存在门限效应,即货币政策对银行风险承担的影响取决于货币政策基准利率偏离泰勒规则利率的程度。当这种偏离小于门限值时,宽松货币政策会增加银行风险承担;当这种偏离大于门限值时,宽松货币政策会降低银行风险承担。本文研究对更好地理解我国货币政策对银行风险承担及金融稳定的影响有一定参考意义。     

在ASP.NET下实现MVC设计模式的探讨

从视图、控制器、模型三个方面简要介绍了在ASP．NET环境下，MVC设计模式的实现，并讨论了MVC模式与其他模式的关系，最后对MVC的优点及缺点进行了分析。     

美国对华贸易技术壁垒的政治经济学分析

技术贸易壁垒已成为中美贸易摩擦的最主要原因之一。本文拓展了格罗斯曼和海普曼的关税模型．对美国对华贸易技术壁垒进行政治经济学分析，指出贸易技术壁垒是美国政府与相关利益集团博弈的结果，其存在具有必然性和长期性，进而提出对我国政府、企业、行业协会的政策建议。