基于软件通信体系结构的OFDM波形实现

探讨了软件定义无线电开放的软件通信体系结构(SCA),实现了其核心框架,在此基础上给出了OFDM波形应用的开发过程,这些都为以后其他波形应用的开发提供了基础。     

直升机载雷达侦察系统目标定位精度分析

本文介绍了直升机载侦察雷达对目标的定位原理和定位过程,分析了定位过程中载机自身定位的方法和坐标转换的过程,并在此基础上给出了影响直升机载侦察雷达对目标定位误差的因素及误差组成。     

基于并行判决法的PCTH-UWB系统性能分析

伪混沌跳时序列(PCTH)最近提出应用于UWB系统。本文分析了PCTH-UWB的工作原理,提出了并行判决法,与直接判决法进行了比较,理论分析及仿真结果表明并行判决法可提高PCTH-UWB系统性能。     

海洋环境监测高频地波雷达的研究现状与发展趋势

高频地波雷达作为一种海洋遥感的重要手段，已有30多年的历史，它可用于海洋表面风、浪、流等状态参数的提取，还可用于目标探测，在专属经济区的监测中，高频地波雷达具有无可比拟的优势。本文介绍了高频地波雷达的发展历史和研究现状及其应用领域，详细叙述了武汉大学研制的高频地波雷达OSMAR2000的体系结构、性能指标和信号处理方法，最后对该研究领域的发展趋势作了简要分析。     

Violations of Service Fairness and Legal Ramifications: The Case of the Managed Care Industry

Adapted from Chan's (2000) model depicting success of litigation, this paper argues that with the application of various legislation, health maintenance organizations' (HMOs') violations of service fairness to each group: enrollees, physicians, and hospitals give rise to each group's lawsuits against the HMOs. Various authors (Bowen et al., 1999; Seiders and Berry, 1998) indicate that justice concepts such as distributive, procedural, and interactional justice can be applied to the area of service fairness. The violation of these underlying justice principles with HMOs' service unfairness to enrollees, physicians, and hospitals is examined. A general synopsis of the ethical issues in the managed care industry is provided. The various lawsuits launched by each group: enrollees, physicians, and hospitals together with the key statutes used are discussed. This paper also highlights the provisions and ramifications of the 11 April 2000 landmark agreement that Aetna made with Texas Attorney General John Cornyn to settle the 1998 lawsuit brought against the company. Lastly, the current ethical issues in the managed care industry are further discussed. The value of this paper can be adapted to the study of organizations' service fairness violations in other industries or in the educational, governmental, and not-for-profit sectors both nationally and internationally.     

中国大中型造纸企业技术创新机制探讨

建立和健全大中型企业以技术创新为核心的技术进步的内在机制 ,保障提高技术创新的绩效是目前亟待解决的问题。本文根据 2 0 0 0年中国科技统计年鉴中的数据 ,对大中型造纸企业在技术创新方面存在的主要问题进行分析 ,就如何完善其动力机制和运行机制提出建议     

未来十年综合航电系统的发展趋向

我国的合同法对代位权的客体做出了明确的限定,这使得代位权制度在实际运用中碰到了一些困难,本文对代位权的客体和抵押权能否成为代位权的客体进行了分析和探讨。     

基于计算机数据分析的品牌价格平衡模型

随着计算机网络与通信技术的发展，信息技术在市场预测模型中的应用越来越广泛。基于计算机数据分析的品牌价格平衡模型（Brand Price Trade-Off），成为国外目前最为成功的一种在模拟竞争环境下测试品牌价格策略的高级研究技术。     

多用户MIMO-OFDM系统中一种子载波分配算法

介绍了多用户MIMO-OFDM系统中的Hungarian子载波分配算法，然后针对其计算复杂度过高的缺陷，提出一种局部最优的子载波分配算法，并与Hungarian子载波分配算法进行仿真比较。结果表明，该算法使系统总数据速率仅下降1．7％，而其计算复杂度却大幅减小，提高了资源分配的效率，符合高速无线系统资源实时分配的要求。     

Productivity Growth in the Chinese Economy by Industry and the Role of Foreign Capital

I. IntroductionIt is well known that China’s reform and open-up policy initiated in 1978 had an extremelylarge impact on the Chinese economy. This policy represented an about-face against thetraditional self-reconstruction strategy that China had maintained since the founding ofthe people’s Republic in 1949. Although China’s economy temporarily fell into confusionfor a few years after the Tian-an-men incident in 1989, China continued to record high GDPgrowth. Moreover, after Deng Xiao…