我国城乡耐用消费品市场用户构成差异的研究——一个创新扩散的视角

创新扩散理论按照用户采用新产品的时间先后顺序将市场细分为创新者、早期采用者、早期大多数、晚期大多数和落后者五种类型。本文在扩散经典理论和中国市场特征的基础上,提出城镇市场和农村市场耐用消费品用户构成差异的假设。研究结果证实了全部假设:城镇的创新者比例显著高于农村,农村的早期采用者比例显著超过城镇,而各类型采用者的采用持续时间农村全面长于城镇。这些结论为更加深入地了解二元经济结构下中国市场的特征提供了有益启示。     

创新影响了银行风险承担吗?——基于中国上市银行的实证检验

本文将银行内部创新因素和外部创新环境引入银行风险承担研究框架,从理论和实证两个方面分析创新对银行风险承担的影响。研究结果发现,创新与银行风险承担之间呈现"U型"的关系,适度创新能够弱化银行风险承担,过度创新会加剧银行风险承担。进一步研究发现,内部创新对非五大行具有当期和滞后的双重影响,而对五大行仅具有当期效应。外部创新对五大行具有当期和滞后的双重影响,而对非五大行的当期影响不显著。企业还款能力、银行贷款质量和创新资产规模是创新影响银行风险承担的重要中介机制。此外,五大行对创新的敏感性小于非五大行,五大行可接受的创新区间大于非五大行。     

对“三从一大”训练原则的再思考

“三从一大”训练原则从提出至今已发挥了巨大的作用，但随着竞技体育竞赛体制的不断改变，竞技体育运动的日益职业化，以及科学技术在竞技体育运动中的广泛应用，赋予了“三从一大”运动训练原则以新的内涵。本文将重点阐释新时期“三从一大”训练原则的科学实施。     

高速磁浮列车技术及其在我国客运交通中的战略地位

高速磁浮列车是当前唯一能达到５００公里／时运营速度的地面交通工具．技术已经成熟．正进入实用运营线建造阶段，将在２１世纪高速客运中发挥重大作用。本文简要介绍了高速磁浮列车技术的发展情况与特点，分析了其在客运交通系统中的地位。从我国国情出发，本文论述了其在我国未来客运交通中的战略地位，并对我国当前发展磁浮列车技术提出了一些建议。     

A direct comparison of physical block occupancy versus timed block occupancy in train timetabling formulations

Two fundamental mathematical formulations for railway timetabling are compared on a common set of sample problems, representing both multiple track high density services in Europe and single track bidirectional operations in North America. One formulation, ACP, enforces against conflicts by constraining time intervals between trains, while the other formulation, RCHF, monitors physical occupation of controlled track segments. The results demonstrate that both ACP and RCHF return comparable solutions in the aggregate, with some significant differences in select instances, and a pattern of significant differences in performance and constraint enforcement overall.     

企业贯彻ISO9000标准的基本思路

总结了我国企业在贯标、认证过程中的经验和教训，提出从抓住两条主线和从体系着眼，从要素着手的一整套经验证为行之有效的思路和方法。     

公务员培训管理理念及战略组合研究

作为“公务员培训特色研究”课题的总论 ,文章的基本观点是 :从教学管理过程来看 ,培训教育是一个可以“交换”的产品 ,围绕这一产品的开发 ,构成了培训环境分析 (SWOT)、培训管理人员管理、培训岗位需求调研、培训目标对象细分、培训实施、培训监控等几个主要环节的战略管理过程。     

An assessment of railway capacity

In this paper, we review the main concepts and methods to perform capacity analyses, and we present an automated tool that is able to perform several capacity analyses. Capacity is extremely dependent on infrastructure, traffic, and operating parameters. Therefore, an in-depth study of the main factors that influence railway capacity is performed on several Spanish railway infrastructures. The results show how the capacity varies according to factors such as train speed, commercial stops, train heterogeneity, distance between railway signals, and timetable robustness.     

Hierarchical Bayesian conjoint models incorporating measurement uncertainty

The authors explore situations where consumers supplement their judgments with a measurement of uncertainty about their own preferences, either implicitly or explicitly, and develop two sets of hierarchical Bayesian conjoint models incorporating such measurements. The first set of models uses the relative location of a rating to determine the importance or weight given to the rating, in a regression setting. The second set uses interval judgment as a dependent variable in a regression setting. After specifying the models, the authors perform a theoretical comparison with a basic Bayesian regression model. They show that, under different conditions, the proposed models will yield more precise individual-level partworth estimates. Two simulated data examples and data from a conjoint study are used to illustrate the gains that could be obtained from modeling uncertainty. In the empirical application, the authors show that model fit improves when ratings for items that respondents do not like are given more weight compared to ratings for items that they do like. Electronic Supplementary Material  The online version of this article (doi:) contains supplementary material, which is available to authorized users.

STD在雷达中的应用

本文介绍了ＳＴＤ总线技术以及ＳＴＤ总线在雷达显控系统中的应用，如何用中断的方式实现显控系统实时多任务。