基于网格计算的机构投资者IRMIS研究

在评述集成风险管理理论进展的基础上,指出了机构投资者集成风险管理信息系统(IRMIS)的复杂自适应系统(CAS)特征;引入网格计算思想提出了基于网格计算的机构投资者IRMIS的概念、特点及其系统原型,该原型具有多智能体(Multi-Agent)的良好结构,并基于管理熵对原型各Agent间的耦合关系进行了优化,强调风险管理战略、组织、方法、文化和过程诸要素的集成性。     

基于PCIe总线的双路1394B接口模块设计与实现

为了满足航电系统中前端传感器捕获的图形图像数据实时传输的需求,设计并实现了基于PCIe总线的双路1394B接口模块。该模块通过PCIe接口与主机交互,采用S400β传输模式,软件设计符合标准OHCI规范,支持AS5643协议,异步流包数据收发采用链式队列管理,主机与1394B控制器之间通过DMA操作,实现大数据块的并行处理,两路1394B相互独立,显著提升数据传输性能。测试验证结果表明,该模块具备带宽高、可靠性高、CPU资源占用率低等特点,已在某项目获得成功应用,实现了图形图像数据的实时传输,满足系统设计要求,表现出了良好的稳定性和适应性,具有实践应用价值。     

冬小麦红边参数变化规律及其营养诊断

研究了冬小麦冠层光谱红边参数随作物生育期的变化规律,并进行了红边参数与各组分间的相关分析,发现可利用用红边位置反演叶片可溶性糖和叶绿素含量,利用红边振幅反演叶片全氮含量,利用红谷反演叶面积指数。建立了基于红边参数的各组分的统计回归模型,可为生产上利用遥感手段大面积、无破坏、及时评价冬小麦生长状态及营养诊断提供重要依据。     

Quality of Service Networking for High Performance Grid Applications

This paper reports on different efforts to provide quality of service (QoS) Networking to Grid applications done in the context of the MB-NG, GRS and DataTAG EU projects. These are leading edge network research projects involving more that 50 researchers in the UK, Europe and North America, concerned with the development and testing of protocols and standards for the next generation of high speed networks. We have implemented and tested the Differentiated Services Architecture (DiffServ) in a multi-domain, 2.5 Gbits/s network (the first such deployment) defining appropriate Service Level Agreements (SLAs) to be used between administrative domains to guarantee end-to-end Quality of Service. We characterised several hardware implementations of DiffServ and concluded on their appropriateness for several network scenarios. Since current and future Grid applications will have to use modified mechanisms of congestion control we have evaluated old and new TCP implementations over a Differentiated Services Networks. These quality of service tests have also included innovative MPLS (Multi-Protocol Label Switching) experiments to establish guaranteed bandwidth connections to Grid applications in a fast and efficient way. We have also developed a software based bandwidth broker architecture for Grids based on IETF standards which allows applications to transparently request dynamic and advanced reservations and implemented it in a real experimental network. We finally report on experiences delivering Quality of Service networking to high performance applications like Particle Physics data transfer and High Performance Computation. This includes quantitative results on the performance improvements that QoS brought to real data transfers in the context of High Performance Computing.     

重庆市发展物流金融的SWOT分析与对策研究

物流金融作为物流业与金融业的结合物,能有效整合物流、资金流、信息流,提高整个供应链的效率,对促进金融业、物流业乃至整个经济的发展都具有重要作用。采用S W O T方法对重庆市发展物流金融的条件和环境进行系统分析,可在一定程度上丰富物流金融的研究方法。     

基于Client/Server结构的MIS系统设计

文章给出了Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒｆ客户机／服务器）的体系结构模式,讨论了基于该模式的ＭＩＳ系统特点和设计原则,并给出具体的设计实例。     

Process and data nets: the conceptual model of the M*-OBJECTmethodology

The paper describes a specification model, called the Process and Data Net (PDN) model, used as the modeling tool for the M*-OBJECT information system design methodology. The model integrates the representation of static, dynamic, and behavioral aspects of a database application. PDN consists of two components: an object-oriented data model that describes static and behavioral aspects of objects of the system under analysis, and a process model that specifies a way organization activities must be coordinated. The major features of the proposed approach are: 1) the system representation captures all relevant properties from the end-user viewpoint without unnecessary details concerning implementation, 2) complex data structures and data manipulations can be specified, and 3) specifications are executable for rapid prototyping.     

不稳定对象及非最小相位对象的自抗扰控制仿真研究

针对倒立摆、水轮机调速器、鱼雷定深、飞机高度及直升机俯仰角的控制 ,分别设计了自抗扰控制器 ( ADRC) ,给出其数值仿真结果 ,并与其它控制方案的仿真结果进行比较。仿真研究发现 ,只要对控制器的设计略加改造 ,ADRC对上述对象都具有满意的控制性能 ,从而显示出 ADRC在不稳定对象和非最小相位对象控制中的应用前景。     

隐式裁剪曲面的造型及绘制

隐式曲面没有参数域的概念,故对其裁剪问题的研究,很少有人问津.提出了一种隐式裁剪曲面的造型和绘制方法:先把投影平面变换到xy平面,将该xy平面作正交化网格剖分,由参数表示或隐式表示的裁剪曲线在该xy平面定义裁剪区域,再把裁剪后留下的区域内的网格投影到隐式曲面上,从而实现了隐式裁剪曲面的多边形化绘制.