Nascent Innovation Systems in Developing Countries: University Responses to Regional Needs in Thailand

Universities are playing a major role in regional innovation by interacting directly with regional stakeholders. Up to now there is little evidence on responses of universities to regional needs in developing countries. This paper applies an adopted framework of nascent regional innovation systems in developing countries to a study of the potential impacts of five universities in three regions in Thailand. The empirical evidence suggests that more systematic approaches toward regional university-industry knowledge transfer are still limited by centralized national policies, a low sophistication of regional technological needs, and institutional barriers within the higher education system. University responses to regional needs differ markedly between the Bangkok region and two peripheral regional innovation systems.     

How the Beast really moves: Cayley analysis of mechanism realization spaces using CayMos

For a common class of 2D mechanisms called 1-dof tree decomposable linkages, the following fundamental problems have remained open: (a) How to canonically represent (and visualize) the connected components in the Euclidean realization space. (b) How to efficiently find two realizations representing the shortest “distance” between two connected components. (c) How to classify and efficiently find all the connected components, and the path(s) of continuous motion between two realizations in the same connected component, with or without restricting the realization type (sometimes called orientation type).For a subclass of 1-dof tree-decomposable linkages that includes many commonly studied 1-dof linkages, we solve these problems by representing a connected component of the Euclidean realization space as a curve in a carefully chosen Cayley (non-edge distance) parameter space; and proving that the representation is bijective. We also show that the above set of Cayley parameters is canonical for all generic linkages with the same underlying graph, and can be found efficiently. We add an implementation of these theoretical and algorithmic results into the new software CayMos, and give (to the best of our knowledge) the first complete analysis, visualization and new observations about the realization spaces of many commonly studied 1-dof linkages such as the amusing and well-known Strandbeest, Cardioid, Limacon and other linkages.     

基于平面五杆闭环结构的空间并联机构类型综合与拓扑分析

分析了五杆闭环结构的类型、拓扑描述、组成形式和运动性能 ,重点研究了基于 5R闭环结构与RPRPR闭环结构在空间并联机构中的应用 ,给出了基于五杆闭环结构的空间并联机构的类型综合方法及步骤 ,并综合出了九种空间并联机构的构型。     

连杆机构稳健性优化设计

将设计变量作为随机变量，建立了连杆机构稳健性优化设计的数学模型，并以一个四杆机构为例进行了说明，将传统的确定性优化设计的结果与稳健性优化设计的结果进行了对比。     

双齿轮——六杆机构的研究

对双齿轮——六杆机构进行了系统地研究.建立了输出运动方程,简要介绍了该机构所能实现的六种运动特性,把两个间歇条件联立解方程,解决了间歇机构的综合问题,推荐了选取机构参数的方法和范围,讨论了机构参数对运动和动力特性的影响,总结了该机构的主要优点和适用范围.     

预测含间隙机构副元素分离的临界点判定法

通过对含间隙机构非线性动力学运动微分方程的解析分析，提出了预测含间隙平面连杆机构运动副副元素分离的一种新方法，这一方法是根据间隙副反力≤０即表明副元素产生分离的思想推导出副元素分离临界点的２个判别数，由这２个判别数同时为零来判定副元素的分离。该方法具有较高的预测精度。     

广义等视角定理

本文提出广义等视角定理。它与原来的(狭义的)等视角定理的区别在于视点的数量不同。增加了两点并且证明它的正确性。同时提议称这两点为广义视点(或睛点)。文中给出了应用实例。     

浅析降低房地产项目成本途径与措施

简要分析了影响房地产项目的关键环节：投资决策和工程设计阶段、工程建设阶段、竣工验收和项目决算等阶段；重点提出了降低工程成本的具体措施：重视决策及设计；严格进行工程招投标；重点做好贯穿于工程建设全过程的成本控制；加强项目管理，合理运用各方面资源降低工程成本；积极组织和协调工程建设等。     

用连杆机构分类法进行机械装置的创新综合

通过对机械装置方案综合的一种新方法─—连杆机构分类法的若干原理及方法的探索和研究，分析并导出了具有常用自由度特征的机械装置的连杆机构容异构体，并用设计实例进行了这类装置的创意设计和结构型式综合。连杆机构分类法，容许异物体，创造性综合