Ozone Treatment of Secondary Effluent at U.S. Municipal Wastewater Treatment Plants

Ozone is a strong oxidant used to treat a variety of constituents in potable water, wastewater, water reuse, and industrial water treatment applications. Ozone is effective at oxidizing a wide range of organic and inorganic compounds and disinfection. Well-known in potable water treatment, with about 400 US installations and 3,000 world-wide, ozone has limited application at wastewater treatments, with less than 10 operating facilities in the US. The ability of ozone to significantly reduce low level concentrations of trace organic compounds, including endocrine disrupting chemicals (EDCs), pharmaceuticals and personal care products (PPCPs), and other emerging contaminants have increased interest in applying ozone in potable water and wastewater treatment. Treating at the point source discharge rather than the water supply intake may be more effective. A recent American Water Works Research Foundation (AwwaRF) report indicated high removals of many EDCs and PPCPs at typical disinfection doses. Several wastewater utilities have installed or are in the process of installing ozone to treat secondary effluent. These utilities are using ozone in a variety of ways: as a primary disinfectant, for treatment of microconstituents, and in combination with other processes (e.g. membranes and UV) to produce high-quality water for indirect potable reuse (IPR). The different applications, treatment goals and basis of process selection are compared and contrasted. Secondary benefits of ozone treatment of secondary effluent, including the use of off-gas in biological treatment is also discussed.     

“非文物类”历史建筑保护和再利用方法浅析——以上海市滇池大楼为例

该文以上海市滇池大楼为例,分析其存在的问题,并进行价值评估,探索保护和再利用的方法。该文旨在以典型个例的研究,反映共性问题,为大量"非文物类"历史建筑在当代城市生活中的生命存续和价值新生寻求可行之道。     

基于Web的计算模型--Web Service

首先指出了传统面向对象技术和组件技术的局限性，然后介绍了WebService的概念，分析了它的特征及优点，并对Web Service的重用机制和构成机制进行了探讨。     

通用汇总模块的设计和实现

汇总被广泛应用于数据分析,是一种对原始数据进行统计加工整理的过程。传统的专用汇总需要针对各种需求编写专用程序加以处理,工作量大、效率低。文章详细介绍了一个通用汇总模块的设计及实现,通过参数定义,可以大大减轻编写汇总程序的压力。文章还给出了该通用汇总算法的测试结果。     

基于构件/构架复用技术的工控软件设计研究

该文介绍了软件工程领域中崭新的构件/构架复用技术,通过分析工控软件设计的现状与发展趋势,阐明了作为特定应用领域,采用构件/构架复用技术对工控软件设计的巨大推动作用。文章对采用构件/构架复用技术进行工控软件设计的可行性和设计方法进行了分析和讨论。     

面向对象的构件化软件开发

介绍了面向对象、软件复用、构件化软件开发的基本概念和原理 ,讨论了构件化软件开发的主要研究内容、开发过程、构造方法和目前的现状     

Automated prototyping tool-kit (APT)

Automated prototyping tool-kit (APT) is an integrated set of software tools that generate source programs directly from real-time requirements. The APT system uses a fifth-generation prototyping language to model the communication structure, timing constraints, I/O control, and data buffering that comprise the requirements for an embedded software system. The language supports the specification of hard real-time systems with reusable components from domain specific component libraries. APT has been used successfully as a research tool in prototyping large war-fighter control systems (e.g. the command-and-control station, cruise missile flight control system, patriot missile defense systems) and demonstrated its capability to support the development of large complex embedded software.     

基于IP存储网络的备份系统实现与性能优化

随着网络技术的发展,网络数据安全问题日益凸现。作为数据安全的重要防线,网络备份已成为一项被纳入网络计算机体系结构的关键问题。该文设计并实现了一个基于IP存储网络的远程备份系统,然后提出了一种改善网络备份系统中文件传输性能的机制,优化了系统的性能。     

基于组件的库存信息管理系统

通过Web把企业中分散的子系统集中到单一的应用环境下存在着重复开发现象严重、代码重用率低、功能模块移植的工作量大等问题。针对以上问题，以库存管理为例研究了基于组件的企业Web开发方法，建立了库存管理系统的模型和具体的组件库。     

Classification of reference models: a methodology and its application

Classification is an important tool for perception and can be found in numerous scientific disciplines. Several application areas of classification are described in the context of information modeling. The usefulness of classification for reuse resp. selection of reference models is emphasized. A methodology to systematically create classification systems will be introduced. Furthermore, a classification system for reference models will be developed with the aid of the proposed methodology. This classification system gives a comprehensive, but abstract survey of 26 reference models found in the literature.