爆炸排淤填石法中淤泥的本构模型

以爆炸排淤填石法为背景 ,对不同应变率阶段淤泥的本构模型进行了分析 ,利用ANSYS/LS-DYNA动态有限元分析程序对所选择的模型进行验证和确认。计算和分析结果表明 :在形成爆炸空腔的高应变率阶段 ,淤泥表现为理想不可压缩流体的性质 ;在小药量小抵抗线条件下 ,甚至在淤泥自重作用下的较低应变率变形阶段 ,其黏性效应也可以忽略不计。     

QoS-oriented design of embedded systems with specification PEARL

Only recently have methodical tools adequate to design real-time systems been formally introduced in design methodologies. Naturally, they were present from the beginning, but due to the large diversity of embedded systems’ areas of deployment, specially dedicated formalisms have been developed and used. High-level language programming and integration of modeling formalisms into design methods eased the development of more complex real-time applications. With the emerging object-oriented programming languages and design methods, their integration into larger information systems has become more transparent. It was the UML methodology, however, which eventually merged also the design methods and concepts of real-time systems into a consistent whole. It took a large consortium and a long process to persuade industry of the benefits the new integral methodology can offer. On the other hand, there are some trade-offs, and there are some features not completely covered, yet. Here, a different, more straightforward approach to program and design (embedded) real-time systems is presented. Since it emerged from the real-time community, it includes most features relevant there. Independent of the UML profile for schedulability, performance and time specification, a profile was devised for use in PEARL-oriented UML design. The strengths of the mentioned language and design methods for QoS-oriented design of (embedded) real-time systems are emphasised throughout this article.     

OPTIMAL CONTROL OF THE FLEXI- BLE LINK MANIPULATOR WITH CONTROLLABLE LOCAL DEGREES OF FREEDOM

Although flexible manipulators own many potential advantages, one of their major disadvantages is the deterioration of the end-effector accuracy due to the flexibility. Therefore, how to reduce vibration is a significant problem. Inspired by the observation on the motion behaviors of animals, a new idea of decreasing motion deflection of the flexible manipulator is suggested. The concept of controllable local degrees of freedom is proposed and analyzed. By way of optimizing local motion provided by the controllable local degrees of freedom, the end-effector deflection of the flexible manipulator can be effectively decreased through dynamic coupling. The corresponding optimal method for vibration control of the flexible manipulator is put forward. The kinematic simulation is carried ant on a three-link flexible manipulator The corresponding results verify the feasibility of this method.     

基于ANSYS的新型椭圆铰链疲劳仿真分析

为寻找柔度更大的椭圆柔性铰链,将切口开槽与孔隙结构引入柔性铰链中,设计新型的椭圆柔性铰链。运用Solidworks对普通椭圆柔性铰链、含开槽式椭圆柔性铰链、含孔结构的椭圆柔性铰链建立实体模型,采用有限元分析法通过ANSY Workbench分别对这三种铰链进行柔度分析与疲劳分析。仿真结果表明:在椭圆柔性铰链中引入切口开槽或孔隙结构,均可增加铰链的柔度,同时也会降低铰链的疲劳失效安全系数。为含开槽式椭圆柔性铰链与含孔结构椭圆柔性铰链的疲劳研究提供参考。     

柔性不饱和聚酯树脂的研究进展

综述了主链结构、接枝引入柔性链段、交联剂对柔性不饱和聚酯树脂（UPR）性能的影响和进一步提高UPR柔韧性的一些途径,如弹性体增韧、无机物增韧、互穿网络（IPN）增韧,并对柔性UPR的发展趋势进行了预测。     

制造系统柔性评价方法研究

深入分析评价制造系统柔性的基本要求,并介绍柔性熵的概念,建立评价系统柔性的数学模型。通过实例分析,证明该模型对评价制造系统柔性有一定的价值。     

工作流系统中Agent技术的应用研究

针对当前工作流系统中柔性的不足 ,提出了一种应用 A gent技术的柔性工作流系统模型。通过 Agent的应用 ,提高了系统的柔性、自适应和自治能力。通过系统结构的分析 ,详细介绍了组成该模型的各个 Agent的作用及其工作原理 ,最后给出了工作流系统的原型系统。     

Adhesion of electron beam curable coatings on metal substrates

Electron beam (EB) curing is growing more and more important as a curing technique in industrial coatings, for example on substrates like wood, paper and plastics. However, commercial applications of EB curing on metal substrates are rather limited. The main technical cause for this originates from the insufficient adhesion and flexibility shown by EB cured coatings when applied on metal parts. However, adhesion and flexibility can be improved by various ways, in particular via a proper choice of the chemical pretreatment of the substrate. Adhesion of coatings, based on acrylated resins, on hot dipped galvanized steel can be improved dramatically by using a pretreatment, which is not usual in the current field of commercial coil coating. Pretreatments investigated show no relationship to surface tension, so it is highly probable that a chemical graft reaction, initiated by the electron beam, occurs at the interface of the coating and pretreatment layer. Experiments also show that cationic curing binder systems show promise with respect to adhesion and flexibility. Without optimizing the coating formulation (no wetting agents or other additives are used) relatively good adhesion and flexibility can be obtained on hot dipped galvanized steel, under both wet and dry conditions. The adhesion and flexibility are shown to be dependent on the radiation dose, and can be further improved by post-heating. In this case the polymer network gets the opportunity to relax internal stresses that are built up during the cure reaction.     

企业信息化对企业生产系统柔性的影响分析

生产系统柔性是生产系统对外界变化的适应性能力，而企业信息化提高了企业对市场变化的适应性和缓冲能力，相应的也就是提高了企业生产系统的柔性。主要研究企业信息化对提高生产系统柔性的效果和作用，在定性分析企业信息化对生产系统柔性的影响的基础上，提出了基于企业信息化的生产系统柔性的实现途径。     

战略柔性视角下的民营企业集团人力资源管控体系构建--以D集团为例

民营企业随着规模和实力的增强逐步走上了集团化发展道路,传统的集权化管控模式远不能满足企业集团化管理的需要。本文以民营企业D集团为例,分析了其人力资源管控现状,介绍了D集团结合企业所处行业特性、企业发展现状、未来业务发展趋向,提出了战略柔性的人力资源管控模型及设计思路,并系统介绍了企业战略柔性的人力资源管控模型实施的步骤。