基于多Agent的虚拟企业协调机制的研究

资源、服务及流程的分布性和异构性使得虚拟企业在实施阶段往往走向混乱。提出一种具有柔性的基于多Agent的虚拟企业协调模型,分析了不同Agent之间的交互,通过一阶逻辑描述多Agent系统的协调机制,并借助XML语言表示逻辑演算的结果,最后说明该机制的J2EE实现方法。     

基于MAS的虚拟企业框架结构设计

虚拟企业具有动态性、分布性、自治性、异构性等特点，传统的企业信息系统已经不能满足虚拟企业的这些特殊要求。在分析了多代理技术在虚拟企业中应用的必要性和可行性基础上，将多代理技术引入到虚拟企业信息系统中，构造了一个基于MAS技术的虚拟企业框架结构，并对于各功能Agent，给出了一种通用的Agent结构。     

虚拟企业中数字车间与供应链系统的集成与协调

数字车间和供应链系统是虚拟企业的两个重要的功能组织。数字车间与供应链系统的信息集成和功能协调是虚拟企业能够高效运作的基础。Agent技术是构建大型、分布式系统的有效方法。本文研究了基于Agent技术的虚拟企业集成技术和协调机制。     

基于扩展UML的虚拟企业多Agent协作建模研究

通过对UML消息的图形扩展和语义扩展，构建基于合同网的多Agent协作机制，利用UML圈实现了虚拟企业任务分配的多Agent协作建模，该模型具有形象化、易于理解等优点。     

基于多智能体的虚拟企业的构建及运行研究

目前，多智能体技术被认为是研究分布式智能系统的最重要的方法，在分析多智能体技术在虚拟企业中应用的可行性与有效性的基础上，提出采用多智能体构建虚拟企业参考体系结构，给出了对虚拟企业的各自治成员企业进行Agent封装的Agent通用框架和使用多智能支持虚拟企业全生命周期的方法，并探讨了虚拟企业的运行机制。     

先进制造系统中一种基于MAS的检测监控技术研究

针对先进制造系统的复杂性，提出了基于多Agent结构的一种检测监控系统模型。对系统稳态性能进行了分析，描述了相关性能指标。为实现系统协调研究了Agent间协商的策略，提出了一种监控Agent的逻辑结构与功能模型，建立了相应的通信机制，研制并开发了一种基于COM/DCOM的Agent原型系统，给出了一个应用实例。     

基于多Agent技术的敏捷虚拟企业物流信息系统体系结构研究

针对Agent和多Agent技术的特点,阐述了Agent在物流信息系统中的适应性,分析了敏捷虚拟企业物流信息系统的需求,建立了基于多Agent敏捷虚拟企业物流信息系统体系结构。     

基于Web Services的多Agent虚拟企业信息系统的集成研究

为支持虚拟企业的高效运作,针对虚拟企业信息系统的开放性、系统可重构、软件可重用和规模可扩展等特性,用具有自主、智能等特性的Agent来扩展Web Services技术,提出了一种基于Web Services的多Agent虚拟企业信息系统集成框架。通过讨论将Web Services和Agent技术融合在虚拟企业信息系统集成中的优越性,分析了基于Web Services与Agent技术融合的虚拟企业信息系统设计思路,并结合分析对节点企业内部子系统、Web Services与Agent的互操作框架和UDDI系统模型进行了设计,最后给出了基于上述方法和设计思路的集成框架模型。     

基于Web Services的多Agent虚拟企业信息系统的集成研究

为支持虚拟企业的高效运作,针对虚拟企业信息系统的开放性、系统可重构、软件可重用和规模可扩展等特性,用具有自主、智能等特性的Agent来扩展Web Services技术,提出了一种基于Web Services的多Agent虚拟企业信息系统集成框架.通过讨论将Web Services和Agent技术融合在虚拟企业信息系统集成中的优越性,分析了基于Web Services 与Agent技术融合的虚拟企业信息系统设计思路,并结合分析对节点企业内部子系统、Web Services与Agent的互操作框架和UDDI系统模型进行了设计,最后给出了基于上述方法和设计思路的集成框架模型.     

基于多Agent的虚拟企业调度研究与实现

针对虚拟企业制造环境的不确定性、动态性和复杂性，运用多Agent技术实现生产调度系统的反应性和智能性．构建了虚拟企业生产调度系统体系结构；通过Agent能力匹配来实现任务分解；采用基于合同网的协商和多属性决策来解决虚拟企业调度问题中的任务分配和协作，利用集成的优化算法来自动处理调度优化问题，并进行了原型系统的开发。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

Limits of topographic measurement by the scanning tunnelling and atomic force microscopes

Parameters describing the topographic character of a surface (height, surface wavelength, slope and curvature) can be derived from equivalent sinusoidal profiles. The response of a surface-measuring instrument may be modelled in terms of instrument parameters such as stylus radius, and scanning range and resolution. The performance of the instrument may then be mapped as a zone in amplitude-wavelength (AW) space to show the sinusoidal profiles it is capable of measuring. In a first-order analysis the STM and AFM are considered as equivalent to contact-stylus instruments with a notional stylus radius equal to the tip radius plus the gap. Comparisons between different instruments and types of instrument are readily made by mapping in AW space. The error arising from convolution of the sinusoidal profile with that of the finite tip may be quantified and plotted as contours in AW space.