我国产业园区建设中的产城融合问题研究

阐述了产城融合理念的由来及其含义,剖析了当前产城脱节的现状及其原因;从产城功能的连接、各项局部功能的综合完善、生产要素的合理流动3个方面分析了处理好产城融合的内在要求并从强化规划的衔接、建立产业支撑体系、明确产业发展的功能定位、完善基础设施建设4个方面论述了促进产城融合的路径。     

基于因子分析的钢铁板块上市公司综合评价

运用多元统计法中的因子分析法,对2011年我国30家比较典型的钢铁板块上市公司,进行综合财务状况的研究分析。首先选取能反映钢铁上市公司经营状况的12项财务指标数据,对其进行标准化,再通过因子分析法提取5个公共因子计算出各个上市公司的因子得分,根据因子得分排序,对结果进行综合评价,给公司管理层提出建议,给投资者提出最佳的投资决策。     

株洲工业园区升级发展的对策研究

工业是株洲的特色所在,株洲工业园区经过二十多年的发展,取得了长足的进步,但同时也存在着转型压力很大、造血功能不强、发展后劲不足、发展环境不优等问题。因此,株洲工业园区要实现升级发展,必须突出园区的集聚效应,以大园区集聚大产业,以大项目推动大集群,以大招商谋划大发展,以大服务构筑大环境。     

湖北省工业碳排放的灰色斜率关联度分析

为了找到更好的降低碳排放策略,加快湖北省产业结构调整,选取湖北省2005-2012年的工业统计数据,测算碳排放量和碳排放强度,运用改进后的灰色斜率关联度模型对37个行业的碳排放量进行分析,通过对比关联度大小,得出对碳排放总量影响较大的行业,提出要实现低碳型经济发展,需要加快内部产业结构调整,开发利用新能源,加快推进新型工业化。     

用工业CT测量物质密度的ASTM标准方法

介绍了美国ASTM标准中推荐的一种利用工业CT测量物体质量密度的原理与方法以及一个应用案例，显示了该方法较高的测量精度。该法可在工业CT的实际应用与系统性能测定中参考使用。     

计算机多级网络控制技术

介绍在西门子 Win CC视窗过程控制中心操作平台上集中多种网络通信技术的应用 ,多级网络控制系统由以太网 (TCP/IP协议 )、工业以太网 (SINEC H1协议 )、现场总线 (PROFIBUS协议 )、点到点链 RS42 2 (3 964 R系列 RK5 1 2 -方式 )组成     

湿型球磨机槽型衬板工业性试验

通过改变衬板的结构形状来改善衬板的磨损状态，经工业性试验，不仅达到延长衬板使用寿命的目的，而且使磨机处理矿粒的综合性能指标得到有效改善。     

Model checking response times in Networked Automation Systems using jitter bounds

Response time (RT) of Networked Automation Systems (NAS) is affected by timing imperfections induced due to the network, computing and hardware components. Guaranteeing RT in the presence of such timing imperfections is essential for building dependable NAS, and to avoid costly upgrades after deployment in industries.This investigation proposes a methodology and work-flow that combines modelling, simulation, verification, experiments, and software tools to verify the RT of the NAS during the design, rather than after deployment. The RT evaluation work-flow has three phases: model building, modelling and verification. During the model building phase component reaction times are specified and their timing performance is measured by combining experiments with simulation. During the modelling phase, component based mathematical models that capture the network architecture and inter-connection are proposed. Composition of the component models gives the NAS model required for studying the RT performance on system level. Finally, in the verification step, the NAS formal models are abstracted as UPPAAL timed automata with their timing interfaces. To model timing interfaces, the action patterns, and their timing wrapper are proposed. The formal model of high level of abstraction is used to verify the total response time of the NAS where the reactions to be verified are specified using a subset of timed computation tree logic (TCTL) in UPPAAL model checker. The proposed approach is illustrated on an industrial steam boiler deployment.     

On absolute (robust) stability: slope restrictions andstability multipliers

Absolute stability for systems with several sector‐restricted and slope‐restricted nonlinearities is studied in this paper. A critical analysis of the multipliers is performed and the multipliers of Yakubovich type are chosen because the stability inequality is obtained with a minimum of technical assumptions. The main part of the paper is devoted to obtaining the Yakubovich‐type criterion in the unified context of stable, critical, and unstable cases for the linear part. The paper is motivated by the problem of pilot in‐the‐loop oscillations of the aircrafts where critical and unstable cases appear and the saturation nonlinearity is both sector and slope restricted. The paper contains some applications of the frequency domain inequalities. The conclusions show a ‘parsimony principle’: using as few free parameters as possible to obtain the largest possible domain of stability. The paper ends with conclusions and hints for further development. Copyright © 2011 John Wiley & Sons, Ltd.     

基于光纤工业以太环网的矿井安全监控系统设计

提出基于工业以太环网以光纤为传输介质的矿井安全监控系统的设计方案,设计基于以太环网的煤矿工业控制网络的实用模型,重点介绍系统的总体结构,以及方案的具体实施.该方案解决安全监控系统在煤矿复杂环境下的信息传输问题.