基于延迟自相关特性的码速率测量技术

通信信号的识别与解调是通信侦察的重要研究内容，在通常情况下，通信信号的很多参数并不知道。本文介绍了一种基于通信信号码延迟自相关特性的码速率测量技术，并给出了码速率测量理论分析及基于硬件的实现技术，仿真和实验结果表明本方案具有较高的测量性能。     

卫星通信地球站终端技术的发展

本文介绍了卫星通信地球站终端技术的发展过程,初步论述了新技术应用的环境,为今后研制卫星通信设备提供某些参考。     

自适应调制与编码系统及其在WCDMA中的应用

本文主要讨论自适应调制与编码系统(Adaptive Modulation and Coding system）的原理，介绍AMCS实现的几个关键技术，包括RCPT（速率适配凿孔turbo）码、高阶调制、H-ARQ和MIMO（多输入多输出）系统。介绍了在WCDMA的高速下行分组接入业务（HSDPA）中使用的自适应调制编码机制，并讨论了可能增加的设备复杂度。     

浅析多媒体技术在车辆工程教学中的应用

随着教育的发展 ,传统的教学方法已不能满足时代的需要 ,亟待运用现代教育技术手段 ,特别是多媒体的教学形式进入课堂 ,以发挥其特有的功能来提高学习效率。本文浅淡了如何在车辆工程教学中运用计算机多媒体的图、文、声、像并茂的特点 ,有效的激发学生的学习兴趣。     

Modelling exchange of probabilistic opinions

Summary. This paper studies how communication or exchange of opinions influences correlation of beliefs. The paper focuses on a situation in which agents communicate with each other infinitely many times without observing data. It is an extension to the ‘Expert Problem’ in Bayesian theory, where the informational flow is asymmetric. Moreover, this paper generalizes the existing literature of communication that employs the common prior assumption (CPA) by allowing for heterogeneous beliefs. Some basic convergence results are shown in contrast with the results obtained under the CPA. Furthermore, several economic implications of the basic results are provided. Received: August 27, 2001; revised version: April 16, 2002 RID="*" ID="*" The results presented in this paper are taken from my Ph.D. thesis at Stanford University. I gratefully acknowledge the inspiration obtained from innumerable discussions with Mordecai Kurz about this subject. Also, I appreciate comments from Kenneth J. Arrow, Peter J. Hammond, Maurizio Motolese, Carsten K. Nielsen, Ho-Mou Wu and the anonymous referee.     

Communication equilibrium payoffs in repeated games with imperfect monitoring

We characterize the set of communication equilibrium payoffs of any undiscounted repeated matrix-game with imperfect monitoring and complete information. For two-player games, a characterization is provided by Mertens, Sorin, and Zamir (Repeated games, Part A (1994) CORE DP 9420), mainly using Lehrer's (Math. Operations Res. (1992) 175) result for correlated equilibria. The main result of this paper is to extend this characterization to the n-player case. The proof of the characterization relies on an analogy with an auxiliary 2-player repeated game with incomplete information and imperfect monitoring. We use Kohlberg's (Int. J. Game Theory (1975) 7) result to construct explicitly a canonical communication device for each communication equilibrium payoff.     

S7-300 PLC在交叉铺网机上的应用

介绍了西门子S7-300 PLC和KEB伺服驱动器在非织造布设备交叉铺网机中的应用,着重介绍PLC控制系统的配置方案、软件设计思想,PROFIBUS通讯等.     

新能源汽车财务与非财务消息对股市影响的多维特征及差异

新能源汽车股市是投资者对公司财务绩效、政策导向、技术水平和发展前景等多方面因素综合反应的结果。将新能源汽车产业相关消息分为"财务"和"非财务"消息,应用事件研究法从"敏感性""、强弱性"和"持续性"三个维度分析了财务与非财务类消息对于新能源汽车股市影响的差异性。结果表明,新能源汽车非财务类消息对于股市表现影响的强度和持续性相对更显著。新能源汽车非财务类消息中的政策、市场消息对于股市表现影响的敏感性要高于技术消息,政策、技术消息对于股市表现影响的强度明显高于市场消息,技术消息对于股市表现影响的持续性明显优于政策和市场类消息。新能源汽车产业的政策扶持不应仅仅关注现阶段新能源汽车制造商的财务指标,更应高度关注新能源汽车制造商的创新能力。制造商要进一步加大新能源汽车的研发投入,通过资本市场的合理融资促进新能源汽车技术创新和长期盈利能力提升。     

浅析我国报废汽车的回收与再利用

在汽车产业高速发展的今天,如何有效地回收报废汽车,并对其进行再利用,降低环境污染,已经成为一项严峻的社会问题。本文针对我国报废汽车回收现状、相关政策和标准进行了初步的分析,并借鉴欧洲相关法规和指令,对如何进一步提升我国报废汽车产业回收和再利用的效率,提出一些参考建议？