基于UG的视图创建过程研究

在使用UG创建二维图时,会用到大量视图来表达不同零件间的关系。熟练掌握UG软件中常见视图的特点、使用技巧及其之间的区别,可提高工作效率,创造价值。     

Dynamics of financial markets and transaction costs: A graph-based study

In financial markets, trading patterns influence the behaviour of arbitrage, surveillance, risk management and pricing returns. The analysis of these patterns is important for defining policies in financial regulation as well as portfolios of international assets. Using financialization as a conceptual framework to understand the current trading patterns of financial markets, this work employs a market graph model for studying the stock indexes of geographically separated financial markets. By using an edge creation condition based on a transaction cost threshold, the resulting market graph features a strong connectivity, some traces of a power law in the degree distribution and an intensive presence of cliques. Furthermore, an inverse relation between transaction costs and maximal clique size is noticed. The market graph model also indicates that infrastructure, sustainability and commodity indexes from APEC, EU and NAFTA affect the behaviour of markets. As a result, the graph approach shows a consistent set of outcomes that mostly explain the financialization dynamics of markets.     

凸轮机构的键合图建模与仿真

阐述了运用键合图法建立凸轮机构模型的一般方法。推导出了含考虑混合因果关系的便于计算机自动生成的系统状态方程的统一公式,克服了微分因果关系及非线性结型结构给系统自动建模与仿真所带来的代数困难。该方法特别适合于多能域并存系统一体化建模与仿真,通过实例说明本文方法的有效性。     

基于CiteSpace的国内控制权研究进展与热点趋势分析

采用CiteSpace软件对中国社会科学引文索引(CSSCI)2000—2020年收录的主题为控制权的993篇文献进行可视化分析,定量全面梳理了中国控制权研究的整体脉络和发展趋势.研究结果表明:控制权研究经历了从聚焦于控制权本身到控制权配置要素及应用等阶段;控制权研究主要受到管理学、经济学两大学科的关注,国内控制权已形成多个研究团队,研究机构间的合作行为较少;控制权研究主题前四聚类为控制权、控制权私利、控制权转移、剩余控制权;关键性资源、保险行业、不稳定公共组织过程、公共数字文化服务、异质性股东以及外部投资者、投资者非理性行为、控制权强度等是目前以及未来一段时间的研究重点.     

中国中小企业科技创新研究热点趋势及启示

中小企业是国民经济发展最为活跃的组成部分,中小企业科技创新能力关系到整个国家科技创新的活力和水平。通过CiteSpace软件与文献计量方法分析中国近10年中小企业科技创新的研究热点、方向和趋势,总结出中国中小企业在科技创新领域存在的问题并给出相应的建议。研究发现：中国对中小企业科技创新的研究热点集中在经济生态环境的构建、创新人才培养、创新政策及金融支撑与合作机制的构建;研究趋势从早期对整体外部环境框架性问题的关注逐步转变为对中小企业内部管理、机制创新和人才管理等内部驱动力的研究。总之,提高中国中小企业科技创新能力需要政策环境、多元化金融服务体系及有效的科研合作机制协同发挥作用、互相促进。     

Models of causal inference: Imperfect but applicable is better than perfect but inapplicable

We assess a recent paper by Durand and Vaara (2009) that advances causal graph modeling as a tool for inferring causes in strategy research. We focus on the Markov condition, a key assumption on which causal graph modeling is based, and show why this condition is invariably violated in strategic management in general and the resource‐based view of the firm in particular. We then introduce vector space modeling as a quantitative alternative to causal graph modeling, and consider how improved methods of causal inference might enhance our ability to test some of the central propositions of the resource‐based view. Copyright © 2013 John Wiley & Sons, Ltd.     

Workflow process modelling and resource allocation based on polychromatic sets theory

In workflow management, studying the relationship between workflow process activities and resource allocation is one of the interesting research topics. Polychromatic sets theory (PST) is a relatively new mathematical theory which is especially suitable for treating such problems. Based on PST, this paper proposes a framework of workflow process modelling and resource allocation. As the theoretical foundation, polychromatic sets (PS), polychromatic graph (PG) and isolation operation (IO) of the PS are introduced. Special net structure (SNS), a special PG with colourless nodes and concolourous edges, is also introduced, and a new workflow process model and its verification algorithm are presented. Furthermore, a workflow resource model based on the entity of PS is developed. Based on IO of PS, the allocation mechanism that considers workflow process and workflow resource is proposed. Finally, a case study is provided to demonstrate the effectiveness of the above-mentioned theory and method.     

基于蜘蛛图法的企业人力资源管理综合评判

科学合理的人力资源管理不仅是降低交易成本、获取较高竞争力的根本保证，还是企业实现战略目标的基本条件。文章通过结构模型筛选出企业人力资源管理评价指标体系，采用成对比较判断矩阵确定了人力资源管理评价指标体系的权重，并运用蜘蛛图法建立了评价模型，最后结合数据分析说明了具体企业人力资源管理状况的优劣。该方法具有直观形象、定量化和可操作性强的特点。     

Information visualisation based on graph models

Information visualisation is a key component of support tools for many applications in science and engineering. A graph is an abstract structure that is widely used to model information for its visualisation. In this paper, we consider practical and general graph formalism called hierarchical graphs and present the Higres and Visual Graph systems aimed at supporting information visualisation on the base of hierarchical graph models.     

流动妇女收入影响的DAG图模型研究

基于江苏省流动妇女生存状况的实地调查,运用贝叶斯网络构造流动妇女收入影响因素的DAG图模型。与线性模型结果不同,流动妇女个体特征并不都直接影响月收入,其中年龄对教育程度和婚姻状况有直接影响,来源地对教育程度有直接影响,教育程度和婚姻状况对职业类型选择有直接影响,职业类型对月收入有直接影响,年龄、来源地、教育程度和婚姻状况对月收入有间接影响。