一个面向企业动态联盟的Web服务合成系统

在网络经济模式下，企业面对市场的不断变化，提出组建动态联盟以共同实现商机的举措。但怎样才能快速、灵活地合成联盟成员间的业务流程，就成为十分关键的问题。Web服务的出现，使企业可以提供“标准的”、Web可访问的业务组件，企业间通过Web服务就可实现有效的业务集成。本文讨论了一个面向企业动态联盟的服务合成系统e_Scope4WS的模型和实现。该系统支持合成服务流程的建模、执行和监控，提供了合成流程中的授权控制和事务处理，并能够根据要求实现合成服务运行中的动态服务查找；同时，还能支持合成服务的快速部署和发布。     

动态联盟企业的模型化及其工具系统

在动态联盟企业模型基础上,阐述了动态联盟企业模型（ＶＥＭ）的建模框架和模型化方法,进一步探讨了支持动态联盟企业模型化的工具系统的系统功能结构与系统的设计实现。     

支持中小企业区域性动态联盟的ASP解决方案

网络化制造是制造业发展的必然趋势，企业通过动态联盟参与其中。中小企业能否有条件参与到联盟中，是动态联盟能否有效实施的关键。在分析了两种典型的动态联盟支持系统模式的基础上，结合中小企业信息化的现状和应用服务供应商的特点，提出了支持中小企业区域性动态联盟的应用服务供应商解决方法的总体结构，并给出了应用实例。     

面向中小企业的动态联盟及其实现模式研究

研究了我国中小企业的现状及其对敏捷制造的需求，讨论动态联盟的实施原则；提出一个低成本，实用化的面向中小企业的动态联盟模型以及基于这一模型的产品开发程序，最后结合浙东地区的实际情况分析实施动态联盟的可行性和具体步骤。     

网络化集成制造系统的运作模式和应用系统研究

在网络化集成制造概念的基础上，建立了网络化集成制造系统的5层体系结构，其核心为市场和客户，从内到外分别合作伙伴层、支持中心层、支撑分系统层和功能分系统层。提出了基于网络化集成制造系统的网络联盟企业2种运作模式。分别为面向大企业的有核心企业模式和面向中小企业的无核心企业模式。开发了网络化集成制造系统的应用系统－－陶瓷产品网络化集成制造系统，并在有关企业及其合作伙伴中实际应用。     

虚拟企业供应链工作流模型的研究与实现

采用扩展的Petri网作建模工具,将活动分到每个角色,基于角色建立虚拟企业中电子商务的工作流模型。该模型在概念层上比较容易表示各伙伴企业的实现业务目标过程中的动态行为;在物理实现时比较基于分布对象体系结构实现对象的即插即用。系统建立在CORBA Web/Intranet平台上,原型系统可以按图形化的模型跨平台互操作、触发相应的处理单元PAS、共享信息、执行企业的活动,浏览器可动态地显示业务执行的过程。整个企业的经营管理活动按一定的规则和次序有控地进行。     

面向企业资源计划全生命周期的建模方法及工具

目前应用于企业资源计划系统建模的方法和工具存在较大缺陷。为此，提出了面向企业资源计划全生命周期的建模方法及相应的工具系统，支持企业资源计划系统需求分析、设计、实施等各阶段模型的灵活构造，并通过映射关系实现模型之间的转换与追溯。给出了企业资源计划全生命周期的建模方法支持企业资源计划业务元模型。通过分析企业资源计划全生命周期的建模需求，探讨企业资源计划全生命周期的建模方法的建模体系与建模过程。企业资源计划全生命周期的建模方法采用片段作为模型的基本组织单位，采用内容对象和图形对象作为模型信息的基本组织单位，支持对建模框架和模型内容的动态配置与扩展，并提供了基于可扩展标记语言的模型转换语言，为将模型数据自动转化为输出文档和程序源代码提供了支持手段。     

一种龙门码垛生产系统的规划设计

为满足某矿泉水生产企业扩大产能及国内瓶类包装的需要,以龙门码垛机器人为研究对象,分析龙门式码垛机器人生产系统功能需求,确定系统整体方案,利用图形化集成建模工具建立其系统模型,对生产系统进行仿真模拟。     

云制造模式下制造能力建模关键技术

阐述了云制造模式下制造能力的内涵,并对制造能力模型构建及描述机制等关键技术做了深入探讨。归纳和总结了当前制造能力研究现状及存在的主要问题,给出了云制造模式下制造能力的概念与分类。构建了制造能力多维信息模型,并给出了针对该模型的制造能力描述框架,为最终实现制造能力形式化描述提供了支持。结合云制造模式下对制造能力共享的实际需求,依据所提出的建模理论和技术,初步开发了一个支持用户按需使用的制造能力服务化系统原型。     

基于Web三维产品模型浏览与批注系统的研究

在动态联盟这种新型制造模式中,各成员企业通过可视化即图形化的方式,访问和个性虚拟企业资源是非常重要的。产品可视化服务是各种应用服务的基础。本文以Web技术为基础,基于B／W／D机制,采用可支持全球异构分布环境显示的虚拟现实建模语言的格式及其与Java的通讯机制EAI,建立了一个典型的可视化服务－网上游览与批注系统的体系结构,分析了系统实现的关键技术,并给出了所开发的原型系统和结论。     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

交通荷载作用下桥梁结构参数识别方法

应用动力节点加载法,将作用在桥梁上的交通荷载转化为等效节点荷载,再用两步构造法识别结构物理参数.第1步,用Newmark-β方法变换结构运动方程,并用结构的加速度响应求得变换空间内的位移、速度和加速度响应;第2步,基于最小二乘原理,构造出变换空间内求解结构参数的递推式,进行结构物理参数识别.数值模拟结果表明,在交通荷载作用下,该方法能够快速、准确地进行桥梁结构参数识别.     

RLS and LMS blind adaptive multi-user detection method and comparison in acoustic communication

RLS and LMS blind adaptive multi-user detection algorithm and multi-user detector was proposed to solve the problem of multi-user signal detection problem encountered in underwater acoustic communication networks.In simulation analysis,RLS and the LMS blind adaptive multi-user detector were designed and tested for synchronous and asynchronous multi-user communication process.The results of SIR comparison and MMSE comparison show that,both of the two methods can realize blind adaptive detection when any user change in multi-user communication,during this process,the training communication sequences are not needed.The RLS algorithm has about 5 dB higher in SIR compared with LMS algorithm,and the convergence velocity of RLS algorithm is also higher than LMS algorithm when the communication users change.RLS algorithm has better ability in multi-user detection than that of LMS algorithm,and it has great attraction and guiding significance for solving the problem of multiple access interference(MAI) in multi-user communication.     

Robust Impedance Control of Robots Using an Adaptive Interaction Force Observer

For robot interaction control,the interaction force between the robot and the manipulated object or environment should be monitored.Impedance control is a type ...     

Research on key techniques of expendable conductivity temperature depth measuring system

This paper analysis the developing of expendable conductivity temperature depth measuring system(XCTD)and introduce its principle of measuring about temperature,salinity and depth of ocean.Some key techniques are put forward.According to the real needs of XCTD,conductivity sensor with high sensitivity is designed by principle of electromagnetic induce,the ocean conductivity from induced electromotive force has been calculated.Adding temperature correction circuit would help to reduce error of conductivity measurement because of sharply changing temperature.Advanced temperature measuring circuit of high precision and the constant current source is used to weaken effect of self-heating of resistance and fluctuation of the source.On respect of remote data transmission,LVDS is a good choice for the purpose of guarantee the quality of data transmitted and the transmission distance is reaching to thousand meters in the seawater.Modular programming method is also brought into this research aimed at improve the stability,reliability and maintainability of the whole measuring system.In February,2015,the trials in South China Sea demonstrate that the developed XCTD realize effective measurement at a speed of 6 knots and detection depth at 800 m.The consistency coefficient of the acquired data is greater than 0.99 and the success rate of probe launching is above 90%.     

CHARACTERISTCS OF FLUID FILM IN OPTIMIZED SPIRAL GROOVE MECHANICAL SEAL

In order to investigate the sealing performance variation resulted from the thermal deformation of the end faces, the equations to calculate the fluid film pressure distribution, the bearing force and the leakage rate are derived, for the fluid film both in parallel gap and in wedgy gap. The geometrical parameters of the sealing members are optimized by means of heat transfer analysis and complex method. The analysis results indicate that the shallow spiral grooves can generate hydrodynamic pressure while the rotating ring rotates and the bearing force of the fluid film in spiral groove end faces is much larger than that in the flat end faces. The deformation increases the bearing force of the fluid film in flat end faces, but it decreases the hydrodynamic pressure of the fluid film in spiral groove end faces. The gap dimensions which determine the characteristics of the fluid film is obtained by coupling analysis of the frictional heat and the thermal deformation in consideration of the equilibrium condition of the bearing force and the closing force. For different gap dimensions, the relationship between the closing force and the leakage rate is also investigated, based on which the leakage rate can be controlled by adjusting the closing force.     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

OPTIMIZATION METHOD ON IMPELLER MERIDIONAL CONTOUR AND 3D BLADE

An optimization method for 3D blade and meridional contour of centrifugal or mixed-flow impeller based on the 3D viscous computational fluid dynamics (CFD) analysis is proposed. The blade is indirectly parameterized using the angular momentum and calculated by inverse design method. The design variables are separated into two categories: the meridional contour design variables and the blade design variables. Firstly, only the blade is optimized using genetic algorithm with the meridional contour remained constant. The artificial neural network (ANN) techniques with the training sample data schemed according to design of experiment theory are adopted to construct the response relation between the blade design variables and the impeller performance. Then, based on the ANN approximated relation between the meridional contour design variables and impeller performance, the meridional contour is optimized. Fewer design variables and less calculation effort is required in this method that may be widely used in the optimization of three-dimension impellers. An optimized impeller in a mixed-flow pump, where the head and the efficiency are enhanced by 12.9% and 4.5% respectively, confirms the validity of this newly proposed method.