离子选择电极法检测中药糖浆剂中的微量氰

一些含氰甙类的中药，如苦杏仁，枇杷叶等，均有一定的止咳平喘功效。用上述药材制砀 糖浆剂，在存放过程中，其氰甙有可能被共存于植物中的酶或其它因素分解，产生具有毒性的氢氰酸。对于本身不含有氰甙类成份的中药糖浆剂，也有可能在不同程度上，直接或间接受到环境中氰的污染。因而对其进行检测是必要的。本文用氰离子选择电极，对十种中成药糖浆剂中的游离氰及总氰含量进行了检测。该法简便，快速，灵敏。     

基于模糊PID预估控制的电镀废水处理中pH/ORP值的优化控制

通过对废水处理工艺的研究,针对废水处理过程控制系统的特点,提出一种废水处理中pH及ORP值的控制方案,并实现智能控制策略研究,达到废水的综合利用及合格排放的目的。     

过程工业水分配网络系统集成的NLP模型

针对单组分杂质用水和废水处理网络同步集成最优化问题,以最小总操作费用为目标,建立了非线性规划(NLP)模型。该模型既考虑了新鲜水费用和水处理费用之间存在的耦合关系以实现二者的优化均衡,又考虑了环境排放标准及分散式处理网络对水网络集成的影响。采用商业优化软件GAMs对算例问题进行求解,结果表明本文提出的模型能有效处理工业水分配网络系统的优化集成问题,与用水网络和废水处理网络分别集成相比,在年总费用上有不同程度的减小,较好地实现了过程工业在满足环保排放规定前提下的经济效益最大化。     

国内招商

寻求内容:采用有机芳香磺酸钠盐和烧碱为原料,要求提供加热“热熔态”化学反应过程的工艺、设备技术、自动控制设施,有机芳香磺酸工序阶段收率90％,连续运转能力1000T/日以上。 寻求解决双甲苯酚的生产工艺 寻求内容:1.日前产品中对甲苯酚对应含量仅91％左右,且邻位和间位无法有效控制,要求解决工艺问题,使产品对应含量达99％以上。2.目前废水中含酚太高,需引进废水处理技术和装置,提取废水中的酚,使废水达到0.5PPM排放标准。     

化工企业自动化仪表的设计探讨

良好的化工企业自动化仪表设计可以优化自动化仪表的使用性能，提高其适应性。简要介绍了化工企业自动化仪表及其设计原则和仪表分类，阐述了化工企业自动化仪表的基本设计理念。     

硫化银电极直接测定工业废水中氰化物的研究——干扰离子的掩蔽与消除

氰化物具有剧毒,是环境监测中的重要指标之一。水中氰化物可分为简单氰化物和络含氰化物两种。目前国内外测定氰的方法是在酸性条件下加热蒸馏试样,将形成氢化氰吸收于氢氧化钠溶液中,然后用滴定法,比色法或电极法定量氰化物,故测量手续较繁琐。定量测定氰化物的方法中以电极法测氰具有测量浓度范围广,不受试液的色度,浊度的影响,有快速和连续监测等优点,用于测定氰化物的离子选择性电极法有碘化银电极     

含酚废水的超声-活性炭联合处理

含酚废水对环境具有较大危害,去除废水中的酚含量对环境安全具有重要的意义.活性炭吸附和超声降解技术都被应用于废水处理中,本文首次将这2种技术联合起来处理含酚废水,并比较了活性炭吸附、超声降解和超声-活性炭联合技术3种方浇法的效果,表明超声-活性炭联合技术对苯酚的去除率高于单独使用活性炭吸附或超声降解,探讨了溶液pH值、超声时间、活性炭投加量等因素对联合处理含酚废水效果的影响,发现处理100 ml的0.01 mol/L的模拟含酚废水,溶液pH值为5,超声处理20 mins,0.4 g活性炭振荡吸附20 mins,可使苯酚去除率达到83.9%.联合技术可以综合2种技术的优势,在废水处理中有着广阔的应用前景.     

用智能体实施化工企业多层优化的新策略

对化工企业的多层次优化提出了一种全面的规划方法，包括经营方案优化、生产调度优化、装置操作优化等，并给出了一个化工企业多层优化框架．在化工企业多层框架的基础上，引入智能体技术，研究了多个智能体的组织、各个智能体的作用以及智能体的设计与实现．     

基于MRP—Ⅱ的化工企业网络经营管理系统

化工企业网络管理系统ＣＮＭＳ是基于ＭＲＰ－Ⅱ的一种新型的企业内部网络管理信息系统，本文论述了三个方面的内容；化工企业内部的数据流向及关系；化工企业网络管理系统的设计；化工企业网络经营管理系统的实现。     

基于智能体的化工企业多层优化框架

在多层次优化的基础上，引入智能体技术，通过智能体之间的协作来求解全局最优解，提出了基于智能体的化工企业多层次优化的框架，以及各个智能体的设计和具体实现，并对某化工企业进行优化，验证了所提出的方法。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate