采用闭环双口RAM实现深空动态模拟源的设计

深空探测具有时延长、运动速度大以及信号强度低的技术难点。在对上述技术难点进 行分析的基础上,提出了对深空动态模拟的解决办法：通过利用闭环双口RAM来解决模拟时 延较长的问题;改变读出双口RAM数据的速率来模拟卫星的运动速度;控制数控衰减器来模 拟深空的信号强度。实际的工程应用证明上述实现方法有效可行。     

WPS在处理质检办公文件中的合理使用

通过ＷＰＳ汉字编辑软件在处理质检办公文件的合理应用，提出了使用ＷＰＳ某些功能键的技巧，可使文件处理更规范，更完整。     

基于TMS320VC5402的LED显示屏设计

文章介绍了一种以TMS320VC5402DSP为控制核心的LED显示屏设计方案,采用DSP和单片机分别处理显示效果和显示刷新,使用DSPHPI接口实现的与PC主机快速并行通讯,其显示效果灵活多样、数据传输速度快、显示刷新率高,已成功的应用于实践中。     

The Measurement of Consumption Efficiency Considering the Discrete Choice of Consumers

In this study we propose a mathematical definition of the consumption efficiency of multi-attribute products in the price–quality space. A new model, the discrete Range Adjusted Measure (RAM) model, is suggested as an empirical tool to measure the level of consumption efficiency. We further discuss the effect of consumption efficiency on the innovation incentive. Empirical work is made for the mobile phone market. We expect that the consumption efficiency concept will contribute to the extension of the traditional framework of production efficiency analysis on the one hand and to the understanding of the nature of innovation in a technology-intensive market on the other hand.JEL Classification: C67, D11, D12, D21     

大型LED显示系统的设计与研制

绍了一种由单片机组成的大型ＬＥＤ显示系统的功能特点、硬件结构和软件框图。该系统由主单片机ＣＰＵ完成与ＰＣ机的通讯,同时完成数据存储、动画处理、循环显示等,由辅单片机ＣＰＵ完成显示画面的刷新。该系统能脱机和连续长期运行,具有结构简单、显示刷新速度快、成本低等特点。     

公开展示权与作品传播的版权保护

作品公开展示包括现场展示和传播展示两种形式,传播展示作品则对版权人和作品使用者利益的影响更大。随着电视广播、有线电视、移动视听设备、计算机网络技术等新兴传播手段飞速发展,传统的复制权、表演权、发行权已不足以保护版权人的利益和满足作品使用者获取信息的需要,公开展示权与发行权、复制权相比较更适合保护网络作品传播展示。     

An innovative method to optimize the maintenance policies in an aircraft: General framework and case study

Maintenance policies applied to aircrafts are governed by a mix of airworthiness authorities’ regulations and choices of suppliers and users. This allows airlines to use different strategies to minimize the total costs of maintenance. In this paper, a new approach that integrates the failure and reparation processes, such as modelling, optimization algorithms, and simulation methods, is proposed to define the best maintenance strategies for complex systems.A case study of an airline carrier is presented. In particular, several critical components for the A320 aircraft family are considered. The impact of the spare parts inventory management is discussed. Different preventive maintenance policies are tested and simulated. With the new policies, the average availability of the aircraft is satisfactory and the total annual cost is reduced to a value of approximately 20% in comparison with the previous policies adopted by the company.     

A directional slacks-based measure of technical inefficiency

Radial measures of efficiency estimated using linear programming (LP) methods can be biased since slack in the constraints defining the technology suggests that at least one input can be reduced, or one output can be expanded, even though a firm is deemed to be “technically efficient.” In this paper, we propose a directional slacks-based measure of technical inefficiency to account for the potential of slack in technological constraints. When no such slacks exist, directional slacks-based inefficiency collapses to the directional technology distance function. Our proposed measure helps to generalize some of the existing slacks-based measures of inefficiency. We examine the financial services provided by Japanese cooperative Shinkin banks, and estimate their inefficiency during the period 2002–2005. This inefficiency declined slightly during the period. We thus propose that slack is an important source of inefficiency which is often not captured by the directional technology distance function.     

FIFO技术在SDH数字交叉连接芯片设计中的应用

交易成本过高是中国企业面临的巨大挑战,努力降低交易成本是中国企业必须解决的问题。本文从实证研究和原因分析两个方面论证了中国企业交易成本过高这一事实。从微观层面来说,诚信缺失是造成中国企业交易成本过高的主要原因,而诸如战略联盟、产业集群、供应链整合等可以扩大企业边界的中间组织是降低中国企业交易成本过高的主要形式,因为这些中间组织的共同特征是, 通过企业间的多种形式的合作,可以减少交易的不确定性和机会主义行为,从而降低交易成本。