业务服务协商中的信任与成本度量方法

针对协商过程可能同时存在多个被选服务的情况，提出了基于多因素约束的多阶段协商流程。针对业务服务多指标的特点，基于模糊集合理论建立了描述协商者综合信誉度和服务指标信誉度的度量模型。为反映协商成本对协商过程的影响，分别从显性成本和隐性成本两个方面提出了协商成本的度量机制。在此基础上，构建了基于多因素约束的服务协商模型，并对其实用性进行了验证。     

基于模块化主结构的广义产品快速报价方法

为满足客户的多层次个性化需求,企业向客户提供物理产品与产品服务的多类型服务包.由于集成服务后的广义产品提供类型的多样性,使得企业向用户科学、定量的快速报价成为一个难题.本文分析了广义产品的组成,广义产品模块结构与价格之间的映射关系,提出了基于模块化主结构的广义产品快速报价模型.基于模块相似性原理,提出了广义产品快速报价方法与过程.最后,以变压器广义产品为例,验证了本文提出的快速报价模型与方法的合理性.     

服务模型语义完备性判定方法与语义增强策略

为准确地表达服务,需要衡量对服务模型的语义表达能力,并对缺失部分进行语义增强.为此,提出一种基于图论的服务模型语义完备性判定方法.通过扩展子图引入超子图概念,给出了可服务模型语义完备性判定定理及证明.通过完备性验证算法及一系列度量指标,验证并度量了服务语义在服务模型表示中的完备程度,并根据验证和度量的结果,给出不同的语义增强策略.最后,在特定的服务语义范围内,对统一建模语言、业务流程建模符号和服务模型驱动的体系结构等三种模型的语义完备性进行了判定和对比分析.     

基于第三方云平台的服务价值链多链知识图谱构建

基于第三方云平台业务数据资源,面向服务价值链多链知识共享和重用的需求,提出服务价值链多链知识图谱构建框架和方法.从服务业务、服务资源和产品等维度出发,构建了服务价值链多链知识体系,设计了服务价值链多链知识图谱构建框架;研究了服务价值链多链知识图谱模型,提出基于二阶段的知识图谱模型构建方法用于求解服务价值链多链知识图谱模...     

面向最终用户的组合服务推荐

为了提高服务组合的效率,提出基于混合相似度策略的组合服务推荐方法,基于用户未完成的组合服务来推荐相似度最高的若干已完成的组合服务.根据组合服务完成程度的不同,提出两种组合服务相似性度量方法:基于BCR模型的行为相似性度量和基于组合服务描述文档的词频一逆向文件频率内容相似性度量.实验表明,该方法的推荐准确率和推荐效率均比经典的组合服务相似性度量方法高,与人工标注数据的相关程度也较高;同时,行为相似性度量更适合完成程度更高的组合服务推荐,而内容相似性度量更适合初始阶段.     

机床主轴非概率可靠性模型的区间分析方法

考虑到不确定性因素,将机床主轴设计中的参数看作区间变量,应用非概率可靠性理论,建立了机床主轴基于区间分析的非概率可靠性模型,给出了多区间变量非线性函数的非概率可靠性度量方法,提出了基于主轴扭转强度和挠度的可靠性度量指标。对XH2320/4机床主轴进行分析结果表明:所提出的区间分析方法在实际工程中的可行性。     

基于元对象机制的语义Web服务组合模型转换方法

为解决面向服务环境下多领域业务过程协同中的语义不一致问题,提出基于模型转换的多领域业务过程协同框架,并基于元对象机制的元建模框架,实现协同本体到服务组合模型的转换.该方法能够保留流程与Web服务中的原始语义信息,提供了灵活的模型转换方法,从而保证不同领域业务过程协同的顺利进行.通过在欧盟ImportNET项目中的应用验证了所提框架和转换方法的有效性.     

基于三维几何特征的产品报价方法

针对当前主流报价系统对产品实例库的多样性和时效性要求高且报价响应效率低的问题,在研究自动特征识别技术和CAD二次开发方法的基础上提出了基于三维几何特征的产品报价方法。首先,对常用设计特征进行分类并建立设计特征标识号、设计特征和加工特征间的映像关系,利用特征标识号和设计特征间的一一映像关系完成设计特征的识别,结合设计特征与加工特征的映像关系实现加工特征的识别;其次,通过零件的材料费用和特征加工费用进行零件的报价研究,综合产品、部件及零件的报价层次关系建立产品报价模型;再次,为快速响应用户个性化需求,建立了从用户需求到产品配置再到快速响应报价的服务模型;最后,开发了基于Creo的三维几何特征的报价系统,并将该报价系统应用于某企业大功率逆变器报价中,提高了产品报价效率,验证了基于三维几何特征的产品报价方法的可行性。     

支持服务应用关联的服务选择方法

随着面向服务思想在业务领域的不断应用,服务的数量急剧增加,海量业务服务形成了一个庞大复杂的业务网络,服务间的动态组合和协作形成了面向服务的业务生态系统,为了高效地进行服务选择,充分发挥服务关联对于服务选择和组合的重要作用,提出了一种支持服务应用关联的服务选择方法。基于服务选择历史信息构建服务关联网络;基于服务关联网络,建立支持服务应用关联的服务选择目标规划模型,并采用遗传算法对所建模型进行求解。通过实验进行了算例分析,验证了所提方法的可行性和有效性。     

基于凸集的结构非概率可靠性度量研究

结构非概率可靠性分析中,结构的可靠性是通过非概率可靠性指标度量的.文中研究结构非概率可靠性的度量方法,对比分析基于区间的非概率可靠性模型和基于凸集合模型的非概率可靠性模型两种情况下的非概率可靠性指标,证明它们之间存在着确定的函数关系,揭示两种指标之间的差异是由不确定因子所决定的本质,并对其进行定性解释.同时得到一些有用的结论.     

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...     

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...     

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.     

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。     

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。     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

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.     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

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.     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.