媒体资产管理系统的设计与开发

结合我公司项目研究与工作实践,分析并建立了一套全新的媒体资产管理系统,该系统全新的设计理念可以使其适合广电行业的内部所有资产管理项目。自由灵活的配置可大大减少项目实施周期,与定制开发结合满足特定用户的特殊要求。     

基于MATLAB对牛头刨床机构的动力学仿真

使用MATLAB对具有较为复杂机构的牛头刨床进行了动力学仿真研究,得出了刨枕各构件的受力规律,并用图形直观显示。研究结果对于牛头刨床的结构优化设计具有指导意义。研究方法可以用于对类似机构的动力学分析。     

空间机器人柔性臂动力学建模,分析,控制与仿真的研究

空间机器人柔性臂是一个非常复杂的非线性，强耦合的动力学系统，其这的研究是比较复杂和困难的问题，本文对其建模，分析到控制与仿真等各个方面，结合国内外和发展的状况，综合性地进行了分析，并对一些需要重点解决的问题进行了较详细的研究与探讨，最后，指出了研究与发展的方向。     

材料科学中的分子动力学模拟研究进展

本文综述了几种常见条件下的分子动力学模拟方法以及分子动力学模拟的最新发展趋势，介绍用分子力学模拟方法研究固体的体相结构，表面问题，界面问题以及薄膜形成过程等方面的研究成果。     

Conceptualizing Dynamic Capabilities in Lean Production: What are They and How Do They Develop?

Abstract

This article addresses the need for developing long-term learning abilities in Lean production: dynamic capabilities. Despite Lean’s remarkable popularity, implementation efforts often emphasize short-term efficiency over developing dynamic capabilities necessary for long-term success. This article advances the understanding of dynamic capabilities in Lean based on a longitudinal in-depth case study at a manufacturing facility. The article shows that dynamic capabilities develop through the development of an organizational setting for improvement activities, termed the improvement system. The improvement system’s effectiveness is characterized by the coherence between participants, technology, management, and organization, and between the improvement system and the work system.     

统计能量法用于空间有效载荷力学响应的分析

针对空间有效载荷特点,采用统计能量法(SEA)进行动力学响应研究。运用该方法建立某有效载荷的SEA计算模型,仿真分析结构整体及关键单元的力学响应,并与实测值进行比对。结果表明,该方法可较好地应用于空间有效载荷力学响应分析,计算精度满足工程要求。     

某小型制氧制氮设备流程改进的探讨

某小型制氧制氮设备由于流程设计上存在的不足 ,存在冷损大、产品浪费大和氮纯度不及时反映工况等问题 ;针对问题 ,提出了改进措施     

低轨道系绳卫星展开过程仿真分析

就空间系绳卫星系统ＴＳＳ展开过程特别是系绳子卫星初始展开阶段,对动力学特性及张力控制规律进行了研究,在此基础上进行了多参数仿真,由于采用了尽可能真实的参数及可靠的初始条件,仿真结果具有较高的可信度,为进一步研究和开发ＴＳＳ提供了依据。     

Lean Implementation and Organizational Transformation: A Literature Review

Manufacturing organizations are constantly striving to develop more effective and flexible means for managing challenges due to globalization and increasing customer expectations. This has led to increased efforts by the business community to research and implement the Toyota Production System, or lean manufacturing, to address these challenges. These efforts have resulted in numerous publications on lean manufacturing, including research reports, scholarly articles, and trade magazine articles. However, the existing body of knowledge on lean manufacturing is disperse and diverse in nature with respect to the application and implementation of lean tools and practices, making it difficult for researchers and practitioners to gain a real grasp of this topic. In this article, we have comprehensively organized the existing work on implementation of lean manufacturing in a more structured way, enabling engineering management practitioners to more easily identify knowledge and best practices and enabling researchers to identify gaps in the extant literature. Lastly, drawing from the organizational science literature, this article also provides important insights on lean manufacturing from the perspective of organizational learning, innovation, and \culture.     

Equivalent normal stiffness of the ball in granular dynamics simulations

In the paper a concept of an equivalent normal ball stiffness based on averaging the work done by the nonlinear Hertz force during the impact is introduced and a numerical assessment is made on its efficiency in simulating collinear collisions. The systems of balls investigated, ranging from 2 to 30, are considered to be coupled and conservative. The energy and momentum conservation principles are used to assess the accuracy of simulation results. The effect of the time step for both linear and nonlinear models is investigated and it is shown that the linear model allows an increased time step compared to a nonlinear one while meeting energy and momentum conservation requirements with the same accuracy. In the paper also the pattern of break up for both models and different number of balls is investigated. It is found that for both models the pattern is the same: the balls are disconnected one at the time with constant rate and this rate does not depend on the number of balls. The financial assistance provided by the National Science and Engineering Research Council of Canada is gratefully acknowledged.     

船用阻尼材料应用概况及施工工艺探讨

介绍了阻尼材料在舰船上的应用概况及对船用阻尼材料的要求,并对施工工艺进行了总结,探讨了阻尼材料的施工要点、施工质量控制、检测方法,并从施工角度提出了阻尼材料的发展方向。     

并行工程管理系统研究

并行工程管理系统是并行工程的核心，它由产品开发过程建模仿真与优化子系统和产品开发过程管理与协调子系统组成。本文讨论了开发过程建模的ＩＤＥＦ３过程描述获取方法，提出了系统的体系结构和主要功能，建立了面向对象的产品开发过程仿真机制。