一种自适应双反馈递阶控制系统

本文以水厂控制为背景,研究一类受随机扰动作用、以时滞动态过程为关联约束的大系 统最优控制问题,提出一种自适应双反馈递阶控制方法.它既能象闭环控制那样满足约束条 件、改善性能指标,又能象开环控制那样,计算量小,收敛性好.     

A reference architecture for telecommunications operations applications

The emerging multi-layer functional model for network operations decomposes management functions into several layers:Service Management Layer, Network Management Layer, Element Management Layer, andElement Layer. To realize the full benefits of this functional distribution, a reference architecture for operations applications is needed. This architecture should enable flexible placement of functions in computing systems or nodes, enable hiding of the complexities of distribution from applications, and prescribe principles for the specification of application interfaces to facilitate application interoperability. This paper describes such a framework architecture. In this framework, applications are deployed in software units calledbuilding blocks, each of which is independently installed and administered. Building blocks interact via interfaces calledcontracts. A contract is an open interface that is specified according to some principles, such as adherence to standard communication paradigms, separation of engineering aspects from functional aspects, and support for previous interface versions. The infrastructure, called theDistributed Processing Environment (DPE), provides communication and security services that enable building blocks to interact via contracts. The DPE provides access and location transparency to applications. The paper presents details of this architecture framework and an example to illustrate specification of contracts for network management functions.     

The New Frontier Issues for Cognition Technology

Cognitive engineering has developed enormously over the last fifteen years. Yet, despite many excellent research projects and publications, its full potential has not been embraced into mainstream system design. This paper will examine the reasons for this failure and argue that the problem is not simply inertia or lack of education. There are strong organisational influences that cause resistance to this particular approach. The discipline itself has characteristics that make it fragile in the modern corporate structure. In addition, the cognitive engineers themselves are not blameless in the equation. They appear to have done exactly what they criticise the engineering community for doing: they have packaged their product in a manner that is not ‘user friendly’ to its target population, not structured to suit its application, and not output in the format required. Suggestions will be made to rectify the situation: a list of actions is proposed for practising cognitive engineers to make their product more likely to enjoy widespread uptake.     

一个商业决策支持系统的设计与实现

介绍一个商流计划决策支持系统的设计思想和实现方法 ,并讨论开发基于知识的决策支持系统的策略。对决策支持系统中的问题处理系统和模型库的组织提出了新观点 ,给出PPS的功能结构和模型的三层表示法。把组件技术引入到系统设计与实现中来 ,用三层client/server结构来实现DSS。     

Effect of NaOH on the decomposition of halogenated hydrocarbon by supercritical water oxidation

To protect alloys from corrosion phenomena in the supercritical water oxidation (SCWO) process, the effects of neutralizer on the conversion and corrosion were investigated. The surface morphologies of all the alloy coupons exposed to 2,4-Dichlorophenol (2,4-DCP) in the SCWO were significantly changed in microscopic images. The theoretical amount of NaOH as a neutralizer was calculated under the assumption of complete oxidation of 2,4-DCP. The pre-dosed NaOH in the range of 100% to 300% stoichiometric amount could not affect significantly the pH value in the SCWO. Moreover, the pH = 7 was not achieved until 700% stoichiometric amount of NaOH was pre-dosed to the reactor. It is noted that the conversion rate recorded over 99% without oxidant when 800% of NaOH was pre-dosed into the reactor. In addition, under the addition of H₂O₂ as an oxidant, the increased amount of NaOH led to the improvement of conversion rate. The pre-dosed NaOH may contribute to the conversion rate of 2,4-DCP in the SCWO. However, due to low solubility of salt in the SCWO, the fouling problem should be solved in the SCWO process.     

Catalytic ozonation of natural organic matter on alumina

The paper aims to show the potential of catalytic ozonation in the presence of alumina for the removal of natural organic mater from drinking water. An investigation into the efficiency of catalytic ozonation, ozonation by-products formation and their biodegradability was the main goal of the paper. Characterisation of fresh and worn alumina was also conducted. The results clearly indicated the high activity of alumina over a long period of time, which is crucial in water treatment technology. The application of alumina to the ozonation system doubled the efficiency of NOM removal from water when compared to ozonation alone. Furthermore, catalytic ozonation resulted in lower by-products and biodegradable organic carbon formation.     

水性光油的研制

以丙烯酸树脂作为分散树脂 ,苯乙烯、甲基丙烯酸甲酯、丙烯酸丁酯等作为混合单体进行乳液聚合制得水性上光油 ,制备时以流平剂 VA与乳化蜡 1∶ 1、甲基丙烯酸甲酯与苯乙烯的 1∶ 1、分散剂用高酸值的水溶性丙烯酸树脂为宜。所制得乳液性能与市售品相比吸水率稍偏高 ,光泽度优于市售品 ,其他性能均相当。     

反式-2-烯醛类化合物和反，反-2，4-二烯醛类化合物在香精中的应用

本文介绍了C5-C13的反式-2-烯醛和反,反-2,4-二烯醛类化合物的性质和在香精中的应用。     

C306型合成甲醇催化剂在哈尔滨气化厂的应用

80kt/a甲醇装置实际运行15个月,原料气为38000m~3/h,空速为5000h~(-1),满负荷时空速为12000～14000h~(-1),引气量在2800m~3,合成塔压力在4.5MPa,温度在210～250℃,CO为18％时,班产甲醇67t以上,达到年产80kt/a的甲醇生产能力。说明此催化剂空速适用范围较宽,不影响甲醇产量。     

浅谈水质稳定剂与高频水处理仪

目前中小型化肥厂普遍采用水质稳定剂处理补充水和循环水，尽管提高了水的利用率，却仍有少量污水排放；使用高频水处理仪技术，不但水质达标，且经济合理。