碳源对EBPR系统响应过程的数值模拟及工艺优化

根据分别以乙酸、丙酸为碳源的强化生物除磷(EBPR)系统中PHA的合成机制出现差异的现象,对全耦合活性污泥数学模型FCASM3的除磷模块进行相应的修改,将易生物降解基质SS分为乙酸SA和丙酸SPRO。应用MATLAB语言为修改后模型的除磷模块编写了一套SBR工艺的模拟程序,模拟了EBPR系统的出水COD、氨氮、磷酸盐,以及分别以乙酸、丙酸为碳源时系统一个周期中PHA的变化。在此基础上,运用该模型对SBR工艺进行了参数优化模拟试验,通过多因素正交模拟试验结果分析,得到了该系统最佳的运行工况:维持溶解氧在2mg/L、水力停留时间为28h、污泥龄为15d,可达到最佳的COD、氨氮和磷酸盐的处理效果。     

混凝剂投量的RBF网络预测控制系统

净水厂水处理工艺中的混凝投药过程是一个大滞后、非线性的复杂系统.针对其特点并结合国内目前投药控制的现状,提出了一种带有前馈补偿的RBF神经网络预测控制新方法.该方法利用人工神经网络建立投药量的预测模型,然后用出水浊度与设定值之间的预测偏差构成闭环控制系统.通过实时的在线滚动优化,实现了投药量的最优投加.经过仿真试验表明,出水浊度能够比较准确地跟踪设定值的变化,同时该方法所需混凝剂量减少,控制效果明显.     

REP:一种降低蓝牙设备能耗仿真设计策略

蓝牙移动设备在传输各种数据过程中电池能耗较大的矛盾日益突出.针对此问题,提出一种降低蓝牙设备电池能耗的仿真设计策略:REP(Reduce Energy Policy).该仿真设计针对文件传输过程中的能量消耗问题展开研究,提出了相应的仿真模型,该模型提取了蓝牙文件传输过程中七个主要的状态,进而基于蓝牙协议规范中的状态机分别对蓝牙主从设备所处状态进行判定,并根据具体数据的传输情况采用控制扫描窗口尺寸,角色切换调度等措施来降低蓝牙通信过程中一些不必要的能耗.实验床结果表明策略与标准的蓝牙通讯流程相比,能降低设备的能量消耗7％-24％左右,并可有效缩短数据端到端延迟.     

基于系统动力学的物流园区与产业园区服务功能联动

运用系统动力学理论,通过因果反馈分析图确定了模型的界限,设计了系统流图,并结合变量之间量化公式的构造,构建了"ILSD"模型,在模型的仿真模拟过程中用GDP、第三产业产值以及进口交易额和出口交易额四个状态变量的模拟值与真实值的误差值检验了模型的有效性.研究结果表明:产业园区的功能转型升级影响物流园区的功能转型升级,二者在功能上有较强的联动关系.物流园区在未来功能建设中将强化增值服务功能和配套服务功能,而弱化基本服务功能,至2017年左右,我国物流园区的增值服务额将超过基本服务额,成为主要服务功能,至2020年左右,我国物流园区的增值服务额的增速分别约是配套服务额增速的2倍和基本服务额增速的3倍左右.     

THE 8~(th) INTERNATIONAL CONGRESS ON INDUSTRIAL AND APPLIED MATHEMATICS

正August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists     

2014 List of Referees

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TSINGHUA UNIVERSITY,Beijing, China

正AF:Any Field The School of Economics and Management at Tsinghua University(Tsinghua SEM)invites applications for faculty positions at all levels(Assistant Professor,Associate Professor and Full Professor)in any fields of business administration and management.Tsinghua SEM is the only school     

《Journal of Systems Science and Systems Engineering》Contents of Volume 23,2014

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Call for Papers The 12th International Conference on Service Systems and Service Management ICSSSM'15

正June 22-24,2015Guangzhou,China http://iec.cnsba.com/index.htmlCo-Sponsored by:ffiEE SMC(pending)South China University of Technology The Chinese University of Hong Kong Tsinghua UniversityHosted bv:School of Business Administration,South China University of Technology,China Conference Co-Chairs:     

分布交互仿真技术综述

介绍了ＤＩＳ的技术特点,综述了ＤＩＳ中关键技术和相关技术,并对目前ＤＩＳ发展过程中遇到的问题进行了深入的分析与论证。     

Innovation Versus Environmental Protection Presumptions

The paper is about negotiating with issues that discourage innovation. The subject is environmental deterioration, with concern directed at the impediments that keep it from being innovatively resolved. The paper is organized around three issues. (1) The dominant model of environmental concern, called environmental protection, is managed predominantly via command and control approaches. (2) Command and control, by relying on analytical segmentation to subdivide the problem into digestible bits and using formal legislation to direct it, are not up to emerging challenges in the area. (3) More robust models are available but difficult to experiment with due to impediments that discourage change. These impediments are seen in ideals associated with protection, prevention, recycling, and sustainability that tend to do more to sustain harmful practices than to seek beneficial alternatives. Being able to appreciate the underlying restrictions of entropy could help stimulate a more innovative agenda. These issues are tested via a project funded by the EPA entitled ENERGY STAR Homes.