互动新媒体中的即时通信业务应用进展

对互动新媒体网络中的即时通信业务进行了阐述,介绍了其应用进展,指出了新型即时通信业务的内涵,分析了互动新媒体中的即时通信业务的实际社会和经济效益,详细阐述了互动新媒体中即时通信业务需要解决的问题和基本的解决思路.互动新媒体中的即时通信业务将成为融合网络和未来新媒体经济的重要推动力.     

基于单向HFC网络的虚拟交互方式实现点播业务

基于单向HFC网络的虚拟交互方式是在有线电视网络双向改造未完成之前的VOD点播解决方案,其核心技术是基于单向HFC网的轮播技术,让观众能对互动点播有一个感性的认识和提前享受基于双向网的VOD互动点播服务,为数字电视平移提供参考.     

有线数字电视整体转换的技术支撑

从前端机房建设、传输平台建设、光缆干线网、互动业务平台、现场技术服务、接入网整改几个方面介绍了如何做好有线数字电视整体转换的技术支撑工作,保障数字电视整体转换的顺利进行。     

基于电价政策的家电控制装置及控制方法

电价影响居民的用电行为,装置包括智能插座和家庭互动终端,两部分根据各自的功能需求分别采用不同的微处理器作为控制单元并相互配合形成一个完善的家庭用电网络,在阶梯峰谷和实时电价政策下可以智能的控制电器工作。整个装置不仅能采集家电的用电量,还能提供平台实现用户与家电的双向通信。一方面用户可以通过互动终端查询家庭用电信息;另一方面互动终端根据实时费率向用户提供用电策略,引导用户降低用电量和用电费。     

On demonstrating cooperative phenomena

The benefits of computer simulation can be enhanced by including animated displays showing the behavior of the systems under study together with the capability for responding immediately to parameter changes and other modifications requested by the observer. A modern computer graphics interface is used to facilitate user interactivity at a highly intuitive level. While hardware capability still limits the nature of problems that can be treated in this manner, the approach provides a much richer simulation environment than previously available. A number of examples of relevance to statistical physics are discussed, the majority of which are associated with cooperative behavior in interacting many-body systems.Dedicated to Cyril Domb-teacher and colleague-on his 70 th birthday.     

Design of a small conversational system

The main features of a time-sharing system for a minicomputer are outlined. An interpretive language LAX plays a central role in the system both as a base for the languages seen by the user and for implementing part of the system. The system is open-ended, new subsystems can be plugged in easily, and a variety of error and interrupt behavior can be obtained.     

试验设备仿真系统中系统网络的设计与实现

通过对试验设备仿真系统自身特点的分析,在系统设计上采用分布式交互仿真技术,其中网络技术起着至关重要的支撑作用。论述从仿真系统网络建设的要求出发,阐述该仿真系统网络结构设计和利用套接字网络编程技术实现网络数据通信两大关键实现步骤,并给出网络通信程序设计的方法。最后对系统运行结果进行分析,解决了系统出现的问题,很好地实现该仿真系统的功能。     

ORSIS – News and further developments

The paper deals with the simulation program Off Road Systems Interactive Simulation (ORSIS) which is the w,orldwide leading simulation tool for off road driving of wheeled vehicles. Even though the present state of development allows a very realistic simulation of the man–vehicle–terrain system, there is continuous further improvement in the computer program’s detail. Some of the recent innovations integrated into the program are presented in this paper. These examples were chosen in a way that the scope of the further developments can be demonstrated. They represent three main directions of the work carried out: the refining of the tire–soil-model, the integration of new technologies and subsystems into the vehicle model and the improvement of the man–machine–interface especially in driving simulators.The first part of the paper describes a further development of the tire–soil-model. A significant improvement has been achieved to include the influence of slippery surfaces on traction in combination with the tire tread pattern. Results from finite element method (FEM) as well as real measurements were used to build up an approach, which qualitatively allows the influence of the positive–negative portion of the tire tread and the lug height of the tire tread on traction to be considered. The basic idea is very simple and straightforward. Moreover the calculation costs are very low, so the enhancement does not affect real time operation.In the second part a physical model for the central tire inflation system (CTIS) is presented. With this model it is possible to simulate the complete pneumatic system of a CTIS, including the air compressor with an accumulator, the pressure line and the wheel valves. The components are modelled by their physical parameters, so an adaptation to different existing tire-pressure-control-systems (TPC) can be made. The paper presents a short review of the modelling and a first validation using real measurements. Furthermore the influence of each parameter, e.g. the discharge flow of the compressor on the inflation time, is presented.The third part of the paper describes a further development of the visualization system. The ORSIS OpenGL graphic engine was separated from the main ORSIS simulation and can be run on different PCs controlled via a network. It is therefore possible to build up very cheap multi-channel visualization systems using consumer PCs running under LinuX. The fact that ORSIS itself is running on a normal PC allows the assembly of comparatively cheap driving simulators of a high end simulation quality.     

波纹钢屋盖结构板件相关屈曲的试验研究与分析

拱型波纹钢屋盖结构的受力机理异常复杂，波纹、加工制作过程中产生的变形和残余应力等初始缺陷在理论分析中很难精确定量描述。论文对波纹钢屋盖结构梯形截面板组进行了轴心和偏心压力作用下稳定承载能力的试验研究，并与理论结果进行了比较分析，试验与理论结果吻合较好。试验结果表明波纹板组具有较高的局部屈曲承载能力，但几乎无屈曲后承栽能力，与平板板组屈曲特性相比有显著差异。     

Numerical simulation analysis for migration-accumulation of oil and water

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