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关键词： 余热发电工程   纯低温   TDS型   分离器   应用   干扰   余热发电系统   水泥生产线  

摘要： 1 研发的技术背景 纯低温余热发电系统在运行过程中，从篦冷机引出的高温含尘废气对AQC炉及其前置热风管路磨损非常严重，二三个月就要进行修复，从而增加了设备的运行成本。由于大多数余热发电项目是在水泥生产线布局完成后增设的，所以不可避免地增加了许多弯头，

关键词： Project management   Scenarios   Uncertainty   Project risk analysis  

摘要： Deterministic models for project scheduling suffer from the fact that they assume complete information and neglect random influences, that occur during project execution. A typical consequence is the underestimation of the project duration as frequently observed in practice. This phenomenon occurs even in the absence of resource constraints and has been the subject of extensive research in the scientific community. This paper presents a method for obtaining relevant information about the project makespan for scheduling models, with dependent random processing time available in the form of scenarios. (C) 2008 Elsevier Ltd. All rights reserved

关键词： Separation system   Separation motors   Jet damping   Pyro   Relative velocity   Relative distance   Launch vehicle   Taguchi method  

摘要： This paper presents in brief the formulation for lateral and longitudinal dynamics associated with the separation and pull out of an ongoing functional stage from the spent stage of a multistage launch vehicle using separation motors as jettisoning system. Taguchi method is employed to understand the influencing parameters in the separation process. It is possible to minimize the number of Monte-Carlo simulations (MCS) by Taguchi's orthogonal array. Statistical analysis has been carried out to identify the probability distribution function (PDF) for reliability and safety assessment of the stage separation system. The tolerances on the pull out time, relative velocity, lateral gap and longitudinal clearances between the separating bodies are taken into account while examining the non-occurrence of collision between the separating bodies. Lateral gap/dynamic clearance between stages are found to be very vital from collision aspects. This study clearly demonstrates the applicability of Taguchi method to capture the essential Monte-Carlo simulation results in the stage separation process. The method of approach followed in this study will be useful to understand the dynamic behavior of the separating bodies during the stage separation process of multistage launch vehicles. (c) 2009 Elsevier Ltd. All rights reserved.

关键词： Polymer membranes   Gas separation   Separation load distribution  

摘要： Polymers are widely used as membrane material to perform the separation of various gaseous mixtures due to their attractive permselective properties and high processability. Although the development of new robust materials is fundamental to enlarge the economic competitiveness in aggressive environments and severe operating conditions, the correct combination of multiple membrane stages in appropriately designed systems can improve significantly the performance, achieving the separation target by using existing materials. In fact, a single membrane stage requires the lowest membrane area but also produces the lowest purity in the permeate stream, whereas multiple membrane stages provide higher purity values with higher membrane surface areas. According to the specific transport properties of rubbery and glassy polymer membranes, it is possible to select an appropriate material in a sequence of membrane units that maximises the purity and the recovery of a species by means of a right share of the separation load on each stage. In this framework, some examples of gas separations of industrial interest are discussed to support this methodology.

关键词： expert systems   fuzzy sets   simulation   tunneling  

摘要： This paper demonstrates how fuzzy expert systems can be integrated within discrete event simulation models to enhance their modeling and predictive capabilities for construction engineering applications. A proposed methodology is presented for extracting the information from experts to develop the fuzzy expert system rules. The developed fuzzy expert system is integrated within a discrete event simulation model to enhance its modeling capability by explicitly accounting for the different factors affecting some of the simulation activities. A tunneling case study is used to illustrate the features of the integrated system. The outputs generated from the integrated system are very comparable to those from the original probabilistic simulation model. The integrated system represents a more realistic modeling scenario, since it thoroughly accounts for the different factors affecting the tunnel boring machine (TBM) advance rate. This paper is relevant to researchers because it provides an advance in combining artificial intelligence techniques with simulation models to yield better tools for construction modeling. It is of relevance to practitioners because it provides a useful tool for modeling construction engineering problems.

关键词： 工程技术研究中心   农产品加工   分离技术   黑龙江省   研究所   模拟移动床色谱   自主知识产权   植物活性多糖  

摘要： 黑龙江省农产品加工工程技术研究中心宏源分离技术研究所是专业从事模拟移动床色谱（SMBC）分离殴备研制及技术应用研究的专业科研单位，现已具有多项自主知识产权及专利。主要产品有：实验型SMBC、中试型SMBC，并可承担工业化SMBC的设计与制造，同时可提供相应的应用技术，包括动植物活性多糖提驭、分离与纯化，手性药物分离纯化，以及植物化学成分分离纯化等。该类设备与技术达到了国内领先水平，该研究所能够提供最优质的技术服务。

关键词： 工程设计   塔器   应用   可持续发展   化学工程   分离工程   化学工业   新材料  

摘要： 塔器技术及分离工程是化学工程的核心内容之一，并在能源、资源、环保、生物、新材料等领域中占有极重要的地位，对化学工业的可持续发展具有十分重要的意义。

关键词： intelligent materials   temperature-responsive polymer   poly(N-isopropylacrylamide)   tissue engineering   living radical polymerization   cell sheet engineering  

摘要： Temperature-responsive intelligent surfaces, prepared by the modi. cation of an interface with poly(N-isopropylacrylamide) and its derivatives, have been used for biomedical applications. Such surfaces exhibit temperature-responsive hydrophilic/hydrophobic alterations with external temperature changes, which, in turn, result in thermally modulated interactions with biomolecules and cells. In this review, we focus on the application of these intelligent surfaces to chromatographic separation and cell cultures. Chromatographic separations using several types of intelligent surfaces are mentioned briefly, and various effects related to the separation of bioactive compounds are discussed, including wettability, copolymer composition and graft polymer architecture. Similarly, we also summarize temperature-responsive cell culture substrates that allow the recovery of confluent cell monolayers as contiguous living cell sheets for tissue-engineering applications. The key factors in temperature-dependent cell adhesion/detachment control are discussed from the viewpoint of grafting temperature-responsive polymers, and new methodologies for effective cell sheet culturing and the construction of thick tissues are summarized.

关键词： 精馏技术   分离工程   工程研究中心   北京化工大学   传质   李群   主任   创新  

摘要： 传质与分离工程，对普通人而言，是一个遥远而陌生的名词。其实．我们的衣食住行，都与这一科学领域有着密不可分的关系。日常生活所需的食品、医药、香料、服装，乃至大到汽车轮胎、小到DVD光盘的生产制造，都离不开这一领域的精馏分离、提纯等技术的支持。

关键词： 石油工程建设   项目管理   劳务管理   劳动力配置  

摘要： 作者根据在苏丹油田建设市场的工作经验,分析了国际石油工程建设领域被国外承包公司普遍采用的决策管理层与各个项目的劳务层的两层分离管理模式,指出这种管理模式具有充分利用劳动力资源、优化劳动力资源配置、能为劳动者创造较公平的竞争环境等优点。