外军空-地和地-空通信装备的发展

空－地和地－空通信在近距空中支援(CAS)作战中发挥着关键作用,不仅可提高作战效率,而且可避免友军误伤。重点论述了黑钻先进技术公司和Teleplan Globe公司的模块化近距离空中支援系统以及世界主要公司的机载电台、士兵视频接收机的技术性能及应用,最后总结了应重点研究的空－地和地－空通信关键技术,如软件通信体系结构、先进宽带组网波形和士兵电台波形等。     

美国Intel－Digital通信公司开发来用宽带码分多址技术的个人通信系统

美国Ｉｎｔｅｌ－Ｄｉｇｉｔａｌ通信公司开发来用宽带码分多址技术的个人通信系统为了满足话音通信和数据通信的需要，许多国家开始使用简单的ＰＣＳ，即采用ＦＤＭＡ或ＴＤＭＡ无线环路方案。美国Ｉｎｔｅｌ－Ｄｉｇｉｔａｌ公司采用宽带码分多址（Ｂ－ＣＤＭＡ）技术，...     

多媒体综合通信系统中链路管理软件的设计与实现

目前通信应用中出现的组织日趋复杂、业务多元化、通信站日趋庞大。人们对通信节点的生存能力和信息传输的灵活、快速、准确、保密、不间断的要求也越来越高，借鉴国外的通信思想和通信组织方法，根据国内用户的实际要求和设备，结合多年的研发经验，我们自行研发了多媒体综合通信系统。本文主要介绍了该系统中的一个关键部分－通信链路管理软件，其作用主要是对各通信业务的管理和选择最佳的通信方式和通信链路。     

基于Winsock的TCP/IP网络通信

西方通过单地址的点－－点通信和广播地址的广播通信程序的设计，较深入地探讨了基于Ｗｉｎｓｏｃｋ的ＴＣＰ／ＩＰ网络通信编程技术。     

采用DTMF方式通信的安全报警系统

介绍一种采用ＤＴＭＦ（Ｄｕａｌ－Ｔｏｎｅ Ｍｕｌｔｉｆｒｅｑｅｎｃｙ）信号方式通信的安全报警系统。分析了区域联用报警系统通信原理,并给出了主要电路和软件的设计方法。     

统一载波测控系统上下行链路AM-PM转换系数测试方法讨论及理论验证

本文针对统一载波测控通信系统的特点，根据放大器的工作特性，讨论了链路指标调幅－调相转换系数的测试方法，并对测试公式进行了推导，该测试方法及计算公式在ＵＳＢ系统中进行过多次验证，其结果令人满意。     

电话网络通信系统的软交换技术

在当前情形下，信息化发展逐渐地向全球化、一体化的形式发展。在这一转化过程中，社会信息化的通信水平在逐渐地提高，从而使人们对电话网络通信的意识也在逐渐地加强，在增加对通信技术了解的同时，不断地加深人们对通信观念的认识。基于企业信息化通信需求的不断加强，其中一个关键问题就是如何完善我国信息化通信水平。本文以如何实现网络电话通信系统的软交换及其智能化改造为研究对象，对此进行深入分析。     

低压电力线双路扩谱通信系统

由于低压电力线的信道特性异常恶劣，为了利用低压电力线实现可靠通信，把数字载波调制与扩谱技术等现代通信技术应用于低压电力线通信，提出了数字载波调制与直序列扩谱(DS)相结合的低压电力线通信模式，建立了低压电力线的MSK双路扩谱通信系统模型；基于该模型，研制了低压电力线的MSK双路扩谱通信电路系统。实验结果表明：该系统不仅满足了电力线通信信道有效带宽窄的特点，实现了较好的频谱利用率，而且具有较强的抗干扰能力。因此，该低压电力线扩谱通信系统能较好地抑制低压电力线通信信道的干扰，提高了通信的可靠性，可广泛应用于低压电力线通信领域。     

基于ATM的无线宽带网络

本文首先介绍了无线宽带网络的技术背景和空中接口，然后讨论了无线宽带通信的核心技术－无线ＡＴＭ的基本原理，如网络体系结构、信元格式、协议栈以及关键技术等，最后给出了现有的无线宽带网络的实验系统和它的标准化进程。     

地铁专用无线通信系统方案比较

地铁专用无线通信系统，担负着提高运营效率、保障行车安全及地铁乘客生命安全的重要使命。经过几种通信系统方案比较，建议地较专用无线通信采用TETRA数字集群通信系统，并以多基站加一级射频直放中继器的结构组成系统。     

What Does the Chinese Customer Want？--Mahle Powertrain＇s Cooperation Experiences with China

The MAHLE Group ranks amongst the top three systems suppliers worldwide for piston systems, cylinder components, valve train systems, air management systems, and liquid management systems. For almost 90 years, MAHLE has played a decisive role in promoting the development of automotive and engine technology, setting standards time and again with 115 production plants on four continents, around 49,000 employees and sales of about 5 billion Euros in 2008.     

混沌在数字通信中的应用

我国高校的国际商务英语专业在经历了20多年的办学历程之后,今天面临着从理论的高度进行整顿、提高的任务。本文发出了“加强理论建设,把我国高校的国际商务英语专业发展成为在理论与实践的结合上更为成熟的独立学科”的呼吁,并阐述了作者对有关国际商务英语学科建设的几个重大问题的看法。     

Service Systems Engineering

Service systems engineering (SSE) focuses on the systematic design and development of service systems. Guided by a value proposition, service systems enable value co-creation through a configuration of actors and resources (often including a service architecture, technology, information, and physical artifacts), therefore constituting complex socio-technical systems. IS research can play a leading role in understanding and developing service systems. SSE calls for research leading to actionable design theories, methods and approaches for systematically designing, developing and piloting service systems, based upon understanding the underlying principles of service systems. Three major challenges have been identified: engineering service architectures, engineering service systems interactions, and engineering resource mobilization, i.e. extending the access to and use of resources by means of IT. Researching SSE is challenging. Assessing the models, methods, or artifacts of SSE often requires embedded research within existing or even novel service systems. Consequently, approaches such as piloting IT-based innovations, design research or action research are the most promising for SSE research. As an integrative discipline, IS is in a unique position to spearhead the efforts in advancing the architecture, interaction, and resource base of service systems with evidence-based design.     

Whistle-Blowing Systems and Legitimacy Theory: A Study of the Motivation to Implement Whistle-Blowing Systems in German Organizations

Until now, there has been no theoretical foundation that explains why organizations implement whistle-blowing systems. By understanding whistle-blowing systems as an instrument that is desired by society, the legitimacy theory could be transferred to the whistle-blowing concept. A survey of German managers shows that legitimacy theory may be supported. Further insights into legitimacy theory are given by the motivation for the design of the implemented systems. The survey shows that, in particular, the implementation of external whistle-blowing systems is seemingly not driven by desired effectiveness. This supports legitimacy theory, since it reveals that external systems are symbolic rather than substantive systems. However, the results do not hold for internal whistle-blowing systems because the implementation of internal systems is ostensibly driven by power theories. The results are interesting for the planned statutory whistleblower protection as they reveal a partially restrained attitude toward whistle-blowing. Whistle-blowing systems are not effective if management is not convinced of their benefits.     

Where there is light,there is dark: a dual process model of high-performance work systems in the eyes of employees

High-performance work systems have been widely adopted in the workplace. Previous research on high-performance work systems debated whether the generated effects are mutual gains or conflicting outcomes for employers and employees. Drawing on the job demands and resources model, this conceptual study proposes that high-performance work systems can be both beneficial and harmful by eliciting distinct perceptions in employees. Specifically, perceptions of job resources are the positive and perceptions of job demands are the negative mechanism whereby high-performance work systems affect employee job performance. This research further proposes that servant leadership strengthens the positive impact of high-performance work systems, whereas directive leadership strengthens the negative impact. Overall, this conceptual research provides new insights into the research on high-performance work systems.     

支付结算体系的前沿理论研究

本文考察了有关支付结算体系的微观和宏观理论，认为国外的研究热点主要集中在以下五个领域：支付体系的成本与效率；消费者的支付选择行为；支付体系的技术安全与创新；跨境支付结算体系；支付结算体系的危机扩散；并对每个领域的前沿理论进行了重点剖析。     

Customer Evaluation of Supply Systems: The Case of Ethiopian Seed Supply Systems

This study explores the performance of Ethiopian seed systems from a customer’s perspective. The study builds on the view that seed supply systems perform marketing functions such as developing new varieties of seed, multiplying the right quantity and quality, and distributing to the right places, at the right time, for an acceptable price. Hence, supply systems create value and satisfy customers. This study’s contribution is twofold. First, customer satisfaction theory is applied to complex chains (i.e. seed supply systems) in emerging markets, with their specific contextual challenges. Second, it identifies the criteria that farmers use to evaluate seed supply systems and evaluates Ethiopian seed supply systems from a farmer customer’s perspective, which can be used as a basis to increase customer satisfaction.     

完善我国城镇职工基本养老保险制度研究

我国城镇职工基本养老保险制度自建立至今,尽管取得相当的成就,但也遇到了很多突出的问题。调整和完善城镇职工基本养老保险制度,是我国顺应养老保险制度改革趋势的必然结果,也是我国建立社会主义市场经济体制的必然要求。     

Where there is light,there is dark: a dual process model of high-performance work systems in the eyes of employees

High-performance work systems have been widely adopted in the workplace. Previous research on high-performance work systems debated whether the generated effects are mutual gains or conflicting outcomes for employers and employees. Drawing on the job demands and resources model, this conceptual study proposes that high-performance work systems can be both beneficial and harmful by eliciting distinct perceptions in employees. Specifically, perceptions of job resources are the positive and perceptions of job demands are the negative mechanism whereby high-performance work systems affect employee job performance. This research further proposes that servant leadership strengthens the positive impact of high-performance work systems, whereas directive leadership strengthens the negative impact. Overall, this conceptual research provides new insights into the research on high-performance work systems.     

Y2K all over again: How groupthink permeates IS and compromises security

Despite increased concerns about security, most government, private, and public information systems remain vulnerable to terrorist and hacker attacks. To examine this potentially catastrophic problem, we study another infamous, expensive failing in information systems: the year 2000 (Y2K) problem. We argue that many of the same drivers of the Y2K problem now impede the security of information systems, and identify groupthink as a root cause of the continuing inability of organizations and IS (information systems) teams to learn from past mistakes in managing information systems. We also identify measures to help organizational team leaders and members prevent future IS-related threats.