跨企业物流信息集成方法的研究

跨企业的物流在制造系统供应链的整个物流中具有重要的作用，分析了跨企业物流信息的作用和特点；以邮政这一典型物流企业的综合计算机网为实例，探讨了跨企业物流信息集成的体系结构；提出了跨企业物流信息的集成技术与方法。     

RosettaNet和ISA-95在企业间制造过程信息集成中的互补性

随着企业对实时性要求的增加,跨企业的制造过程信息集成显得越来越重要。针对这一问题,介绍了RosettaNet和ISA-95在这个领域中的作用,并对这两个标准在集成供应链制造过程信息中的互补性作了初步探讨,提出了一种基于这两个标准的企业间制造过程信息集成框架。     

企业集成平台方案

随着企业信息化的不断发展,不断地对企业集成提出新的要求.在参考目前集成研究现状的基础上,文章提出并分析了企业集成的五个层次网络集成、信息集成、应用集成、过程集成和知识集成.提出了五层的企业集成平台体系结构.该结构的核心功能层由三个系统构成.通过实际系统进行了验证.预测了企业集成的发展趋势.     

制造联盟和制造联盟资源计划

提出在企业群体的制造环境中 ,通过制造联盟资源计划实现跨企业信息集成 ,并对链接企业群体的各类资源进行调度和优化。分析了制造联盟资源计划信息集成的原理和系统功能需求 ,以及与ERP系统的关系 ,给出了基于Web服务和多智能体的系统集成框架 ,并分析了制造联盟资源计划的运行机制和关键技术     

网络化制造中设备层信息集成框架研究

构造了网络化制造中设备层信息交互平台的体系结构，实现现场制造设备与上层应用系统之间的信息无缝交互与集成。在此基础上建立了网络化制造中设备层信息集成框架体系，论述了利用设备层信息交互平台实现设备层与企业内部系统的信息集成和企业外部系统的信息集成，并构建了信息集成框架的网络结构，介绍了其信息交互模式及实现流程。     

基于企业信息流矩阵的信息集成需求分析

确定信息集成的方向是系统集成的前提,由于企业内部存在大量的信息,必须判断现有信息的完善程度以及缺少的信息,才能进行有效地集成。提出了基于企业关键绩效指标建立企业信息流矩阵中各部门的输入信息,采用闭环控制原理确定各部门的输出信息和方向。将企业信息流矩阵引入信息集成分析中,介绍了该矩阵的基本性质、应用范围和使用方法。最后通过例子介绍了信息流矩阵的应用。     

构建基于Portal的企业信息集成平台

Portal是近年IT领域的一项重要新技术，是企业信息化的重要发展方向。当今，人们对于信息的获取、集成要求越来越高。如何更好地解决信息获取的难题，使得适当的人在适当的时间获取适当的信息。Portal就是在这样的背景下应运而生的，它帮助人们在获取特定的数据时不用再进入众多的应用系统，而是由门户就可以方便快捷的获取信息，人们能够快速地调用各种不同的后台应用，并完成对后台应用的各种操作。Portal本身已经由静态网页、内容集成、企业运营平台、应用集成发展到今天完善的Portal。把Portal作为企业信息集成平台，实现企业信息应用的整合，集成、增值，已经成为重要的企业信息应用集成基础框架。     

一种基于对等网技术的企业信息分布式集成方法

针对企业信息集成时传输与共享中采用传统的C／S或B／S结构所存在的“服务器负载过重”和“信息点分散难于集成”等问题，提出了一种新的基于对等网技术的企业信息分布式集成方法，论述了该方法集成框架的组成、运行方案和信息分布处理时信息的定义、传送和控制以及信息安全等关键技术，阐述了具体实现方法，并在实验室获得成功应用。     

基于矩阵的信息集成建模分析与应用

为了与企业的现状相结合，加强对应用系统的分析，提出了信息集成矩阵分析模型。该模型借鉴U／C(User／Creator)矩阵的方法和IF(Information Flow)矩阵的形式，利用企业目标需求和资源现状矩阵，重新界定整个企业的业务流程、组织结构和信息流，并通过分析现有系统功能来确定哪些业务流程、组织部门之间的信息流尚未实现集成。从而形成信息集成的实际需求矩阵，然后再结合信息集成知识库，决定信息集成的方案、方法和技术。     

基于产品结构工作流的PDM与ERP集成

产品数据管理信息和企业资源管理信息构成了企业全局信息的两大组成部分，为了满足企业全局信息化的需要，必须有机集成PDM系统和ERP系统，充分发挥二者的作用，促使整个企业各部门协调工作，保持企业的竞争能力。从分析PDM和ERP的差别和PDM与ERP集成的困难所在着手，提出了以产品BOM为基础，来实现基于产品结构工作流的PDM与ERP集成。根据产品全生命周期的要求，逐步完成从设计、生产到销售的信息集成、功能集成和过程集成，就可以实现企业集成目标。     

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.     

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.     

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...