The evaluation of cluster policy by fuzzy MCDM: Empirical evidence from HsinChu Science Park

In the recent years, industrial clusters have received considerable attention from economists and industrial analysts, because they are seen as the main reason for economic growth and success of certain economic region. This study systematically reviews past researches of industrial cluster. The purpose of this paper is to contribute to the understanding of this issue regarding the driving forces for the growth of industrial cluster and find out the priority among these cluster policies. Taiwan HsinChu Science Park is a prime example for this paper, and its connection with the innovative participators. We begin with an examination of the literature on cluster about its driving forces and policies upon which we propose a conceptual framework. In doing so, we explore the cluster-based industrial system. Then this research adopts the Fuzzy Analytic Hierarchy Process as the analytical tool. The Fuzzy Analytic Hierarchy Process method is used to determine the weightings for evaluation dimension among decision makers. From our research results, the Factor Conditions is the most important driving force for advancing the industrial cluster performance. Moreover, the promotion of international linkages policy and broader framework policies rank the first two priorities for cluster policy. Overall, this paper concludes with some simulations of cluster policy alternatives confronting the industry and the Taiwanese government.     

Practices and risks associated with operation of tie-down lashings in the vehicle transport industry

Load restraint systems in automobile transport utilise tie-down lashings placed over the car’s tyres, which are tensioned manually by the operator using a ratchet assembly. This process has been identified as a significant manual handling injury risk. The aim of this study was to gain insight on the current practices associated with tie-down lashings operation, and identify the gaps between current and optimal practice. We approached this with qualitative and quantitative assessments and one numerical simulation to establish: (i) insight into the factors involved in ratcheting; (ii) the required tension to hold the car on the trailer; and (iii) the tension achieved by drivers in practice and associated joint loads. We identified that the method recommended to the drivers was not used in practice. Drivers instead tensioned the straps to the maximum of their capability, leading to over-tensioning and mechanical overload at the shoulder and elbow. We identified the postures and strategies that resulted in the lowest loads on the upper body during ratcheting (using both hands and performing the task with their full body). This research marks the first step towards the development of a training programme aiming at changing practice to reduce injury risks associated with the operation of tie-down lashings in the automobile transport industry.

Practitioner Summary: The study investigated current practice associated with the operation of tie-down lashings through qualitative (interviews) and quantitative (biomechanical analysis) methods. Operators tended to systematically over-tension the lashings and consequently overexert, increasing injury risks.     

基于攻击图的工控系统脆弱性量化方法

提出了一种基于攻击图的工控系统脆弱性量化研究方法. 从工控系统中存在的漏洞利用难度和漏洞危害性两个维度出发, 同时结合具体的工业系统中有关防御强度、攻击强度、物理损失、信息损失等方面, 提出了一系列的脆弱性量化指标, 制定了比较全面的等级划分标准. 之后将量化指标与攻击图相结合, 利用攻击过程中每一步的原子攻击期望来对可能存在的所有攻击路径进行脆弱性分析. 最后以典型的锅炉控制系统作为实验背景进行了案例分析. 实验结果表明, 该方法能够较全面地分析工控系统中潜在的隐患威胁, 科学合理地评估各条攻击路径的脆弱性, 由此得到总攻击期望最大的攻击路径.     

A constructive approach for an optimal control applied to a class of nonlinear time delay systems

In this contribution, we obtain a nonlinear controller for a class of nonlinear time delay systems, by using the inverse optimality approach. We avoid the solution of the Hamilton Jacobi Bellman type equation and the determination of the Bellman's functional by extending the inverse optimality approach for delay free nonlinear systems to time delay nonlinear systems. This is achieved by combining the Control Lyapunov Function framework and Lyapunov-Krasovskii functionals of complete type. Explicit formulas for an optimal control are obtained. The efficiency of the proposed method is illustrated via experimental results applied to a dehydration process whose model includes a delayed state linear part and a delayed nonlinear part. To give evidence of the good performance of the proposed control law, experimental comparison against an industrial Proportional Integral Derivative controller and optimal linear controller. Additionally experimental robustness tests are presented.     

工业控制系统信息安全审计系统分析与设计

目前工业控制系统(Industrial Control System,ICS)广泛应用于电力、水利、交通运输、大型制造行业以及国家基础公共设施,已经成为国家安全战略的重要部分。 传统的信息安全防护技术(如防火墙技术、入侵检测技术等)因其技术原理和适用协议的差异,使工业控制系统不能取得很好的防范效果。为了有效地提高ICS的安全防护能力,该文针对ICS的数据特点以及协议特点设计了一款ICS信息安全审计系统,该审计系统主要由数据采集模块、内容检测模块、异常行为判断模块、行为处理模块、审计响应模块等组成。实验结果表明,本系统能够对ICS进行全方位的安全审计,能够极大程度地提高ICS的安全防护能力。     

高层二次供水泵站远程监控系统的设计与实现

近几年,各级政府开始要求城市供水企业将高层建筑二次供水纳入日常管理范围,为了达到科学高效的管理目标,提出采用计算机、网络和自控技术对二次供水泵站进行远程监控,并详细介绍了系统的建设目标、建设原则、网络结构、中心端硬软件配置、现场端数据采集和地址分配。该系统实现了不同型号设备跨平台的集成,在实践中具有推广价值。     

我国工业计算机发展现状与机遇

我国工业计算机技术发展已走过了几十年的道路,取得了不斐的成绩,工业计算机产业已具有一定的规模,产品在各个行业广泛应用,效益显著。但与国际相比,发展仍有较大差距。本文论述我国工业计算机发展的历程,分析了产业发展现状及发展机遇与挑战。     

基于IMAN的产品数据管理的实现

该文首先提出了上海家化包装部对 ＰＤＭ的应用需求,在此基础上讨论了包装部 ＰＤＭ系统的功能要求、体系结构、硬件配置和开发技术。最后,根据ＰＤＭ实施的具体实践,分析了 ＰＤＭ实施的效益和障碍。     

一种基于分形小波变换的工业电视图象编码方法研究

通过分析工业电视图象的特点,提出了一种基于分形小波变换编码的工业电视图象压缩方法,从而较好地解决了分形编码只能压缩静止图象的不足,该方法不仅适合于煤矿工业电视图象压缩,而且还可用于其它背景区图象相对静止的工业电视图象的压缩编码,实验结果表明,该法可取得较高压缩比和峰值信噪比,因此具有实用价值。