行业信息

国家产业政策中炭素行业鼓励限制发展项目；炭素行业协会会长分析2006年炭素市场；我国炭素行业基本情况；炭素制品市场分析；2006年国内石墨电极将不再增产；2006年石墨电极价格将走高；[编者按]     

丁酮/苯胺

国内丁酮行情综述分析；7月丁酮进出口海关数据分析；9月中旬国内苯胺动态综述；苯胺后市预测；苯胺今后发展建议。[编者按]     

甲醇

中国甲醇应加大出口；美国将增加对甲醇的需求；2005年国内甲醇进口总量分析；甲醇后市分析。[编者按]     

部分论文摘要

毛细管色谱分离扁桃酸手性对映体；双酚S；间苯二酚合成技术与市场分析；生产染料中间体的新工艺及设备；     

甲苯

亚洲市场3月14日收盘动态；韩国甲苯供应量大幅缩减；华东市场；甲苯开盘抬升；亚洲TDP厂家考虑隆低开工率；甲苯后市分析及预测；[编者按]     

研究与述评

光催化涂料的现状及发展趋势；塑料产品用水性聚氨酯涂料的现状和任务；环境友好型防腐蚀焦油改性环氧树脂涂料的发展；新型涂料的性能和评估方法；涂料工业中的动态力学分析；汽车面漆的流变性和外观；     

粉末涂料

粉末涂料制备方法；内燃机的活塞连杆用自润滑粉末涂料；粉末涂料组合物的制备及其涂装的底材；粉末涂料典型案例分析及处理；含有抗菌剂的涂料粉末和方法；输油管线用熔结环氧粉末涂料的制备；[编者按]     

纯苯

亚洲纯苯生产装置动态；套利活动的恢复再度支持纯苯走强；纯苯后市分析；来全球纯苯需求将继续稳步增加；[编者按]     

塑料市场

新乡化纤推出高性能阻燃剂；独石化生产出聚丙烯大包装膜树脂；上海明月将聚氨酯用于树脂镜片；我国塑料制品出口增速明显回落；2008年中国塑料制品行业分析预测     

市场动态

化工机械业“十一五”发展趋势分析；乙烯-醋酸乙烯共聚物市场缺口大；电石市场需求增长 产量提高；丙酮扩产莫忘规避市场风险；高浓度磷复肥发展有过热苗头。     

Approximate dynamic programming based approach to process control and scheduling

Multi-stage decision problems under uncertainty are abundant in process industries. Markov decision process (MDP) is a general mathematical formulation of such problems. Whereas stochastic programming and dynamic programming are the standard methods to solve MDPs, their unwieldy computational requirements limit their usefulness in real applications. Approximate dynamic programming (ADP) combines simulation and function approximation to alleviate the ‘curse-of-dimensionality’ associated with the traditional dynamic programming approach. In this paper, we present the ADP as a viable way to solve MDPs for process control and scheduling problems. We bring forth some key issues for its successful application in these types of problems, including the choice of function approximator and the use of a penalty function to guard against over-extending the value function approximation in the value iteration. Application studies involving a number of well-known control and scheduling problems, including dual control, multiple controller scheduling, and resource constrained project scheduling problems, point to the promising potentials of ADP.     

群决策中基于语言评价信息的TOPSIS方法

针对基于语言评价信息的群决策问题,提出了一种新的TOPSIS方法。依据传统的TOPSIS方法的基本思路,首先将语言决策矩阵转换为规范决策矩阵;其次,通过变量转换关系对有序语言短语集中的有序语言短语进行"量化",构造与原语言决策矩阵"等价的导出"决策矩阵,并利用算术加权平均算法对所得到的导出决策矩阵进行群的集结;然后对所得到的决策矩阵构造理想点和负理想点,计算每个方案的相对接近度,根据得到的相对接近度对方案进行排序从而确定最优方案。最后通过一个算例说明了该方法的有效性和实用性。     

Multistage adaptive stochastic mixed integer optimization under endogenous and exogenous uncertainty

To solve multistage adaptive stochastic optimization problems under both endogenous and exogenous uncertainty, a novel solution framework based on robust optimization technique is proposed. The endogenous uncertainty is modeled as scenarios based on an uncertainty set partitioning method. For each scenario, the adaptive binary decision is assumed constant and the continuous variable is approximated by a function linearly dependent on endogenous uncertain parameters. The exogenous uncertainty is modeled using lifting methods. The adaptive decisions are approximated using affine functions of the lifted uncertain parameters. In order to demonstrate the applicability of the proposed framework, a number of numerical examples of different complexity are studied and a case study for infrastructure and production planning of shale gas field development are presented. The results show that the proposed framework can effectively solve multistage adaptive stochastic optimization problems under both types of uncertainty.     

轮胎接触问题的分析与研究

简要地综述了轮胎接触问题分析的发展过程及所使用的一些方法，着重介绍了三维有限元法在轮胎接触问题中的应用，同时也概括了弹性力学理论及实验测试在轮胎接触问题中的应用。本文对轮胎接触问题的分析主要是围绕静态接触和滚动接触两方面展开论述的，列出了轮胎接触问题中轮胎变形、接触区形状大小、接触压力分布、应力分布、载荷变形关系、内轮廓形状等结果     

Designing sustainable alternatives for batch operations using an intelligent simulation–optimization framework

The drive towards sustainability has compelled the batch process industries to implement the concept of environmentally friendly plants. However, the temporal nature of processing in these processes obviates the application of traditional waste minimization, material recycling, or energy integration schemes. Further, most of the existing methodologies for generating sustainable alternatives are restricted to specific problems, such as reaction byproduct, wastewater, or solvent minimization. In this paper, we propose an intelligent simulation–optimization framework for identifying comprehensive sustainable alternatives for batch processes. We differentiate between wastes generated by the reaction–separation process and cleaning wastes. A P-graph-based approach is used for identifying the root cause of process waste generation and generating broad design alternatives. Specific variable-level design solutions are then identified and evaluated using process simulation. The cleaning wastes resulting from the optimized process are also minimized using a source-sink allocation method that allows design of recycle network structure. A multi-objective stochastic optimization method is used to integrate the analysis so that the overall process economic and environmental footprint is optimized. We illustrate the proposed methodology using a well-known literature case study involving reaction, distillation and washing operation.     

项目评价方法的比较与发展趋势

项目评价方法一类是对项目自身进行研究,分析项目的可行性;另一类是将项目看作企业的有机组成部分,从企业的核心能力及战略的角度来分析项目的可行性。目前,国内企业的项目评价主要是利用财务数据作为判断的标准,对项目竞争力则研究不足,对将项目投资与公司核心能力及公司战略结合起来进行分析重视的不够。认为随着我国市场经济的进一步深化,项目评价技术必须与公司核心能力及公司战略更紧密的结合在一起。     

A decision support tool formulti‐pollutants reduction incement industry using analytic hierarchy process (AHP)

Several energy intensive industries are contributing to air pollution problems. Cement industry, as an example, is one of these significant sources of several air pollutants and these must be monitored and controlled. This paper deals with five air pollutants from cement plants and these are SO₂, NO_x, CO₂, dust, and volatile organic compounds (VOC). The purpose of this study is to evaluate several available technologies to control each pollutant. Analytic hierarchy process (AHP) technique is used as a decision support tool to find the best technology for each pollutant under multi‐criteria. These criteria are: cost, efficiency, lifetime or duration, and industry acceptability. The technique is illustrated in a case study from St. Marys Plant, located in St. Marys, Ontario, Canada. The results show that adsorption on activated coke technology will be recommended for SO₂ reduction. For NO_x reduction, the AHP suggests to apply selective non‐catalytic reduction (SNCR) technology based on the four criteria defined. Carbon capture and sequestration (CCS) using MEA technology is chosen for CO₂ reduction. For dust reduction, bag filters should be used and increase oxygen concentration at the kiln inlet is the selected technology for VOC reduction. The current paper covers the set of criteria weights considered typical for cement plants. The results presented here are illustrative and user defined weighting is required to make this study valuable for a specific group of users.     

物流管理数据仓库模型

阐述了数据仓库在物流发展中的重要作用,并且分析比较了数据库和数据仓库在使用过程中的不同作用。根据物流决策分析的要求和数据仓库模型的设计步骤,分别对物流管理数据仓库的主题选择,数据模型、数据粒度进行了详细分析,并且提出物流管理仓库的体系结构及实现。     

风险型多指标决策分析方法研究

根据风险型多指标决策问题的特点,利用确定型多指标决策和单目标风险型决策理论,提出了三种风险型多指标决策分析方法,并以实例验证.