循环式活性污泥法（CAST）的应用及其发展

概括地介绍了循环式活性污泥法的主要发展及其应用，对该法在一些大型污水处理厂的具体应用也作了简单的说明。ＣＡＳＴ系统将可变容积活性污泥法过程与生物选择器原理有机地结合在一起使其有别于传统的ＳＢＲＴＡ工艺。     

Effect of exogenous carbon sources on removal of inorganic nutrient by the nitrification-denitrification process

A bench scale study was undertaken to examine the effects of exogenous carbon substrates on the removal of inorganic nitrogen and phosphorus by a simple nitrification-denitrification process. Each plastic tank reactor was subjected to a 7-h aeration followed by a 5-h anoxic stage. Methanol, glucose and sodium acetate, at the concentrations equivalent to theoretical COD values of 100 and 200 mg O₂ l⁻¹ were used as external carbon sources and were added to the reactors prior to the anoxic stage. Effects of these additions on biological phosphate release were also investigated. The results showed that 94% of NH₄⁺-N was removed at the end of the aeration period. During the anoxic stage, reduction of nitrate to nitrogen gas was recorded and the denitrification process was significantly enhanced by the addition of organic carbon substrates. At the end of the anoxic stage, over 90% reduction was achieved in the tanks with exogenous carbon substrates while only 47% of NO₃⁻-N was removed in the control reactors. Among the three substrates, sodium acetate was the most efficient and effective source, followed by methanol and glucose. Addition of sodium acetate not only increased the amount of nitrate reduction but also enhanced the rate of N removal especially when a high dosage of sodium acetate was used. With respect to phosphorus removal, 88% ortho-P was removed after the aerobic stage. Throughout the anoxic stage, P concentration was maintained at about 2 mg l⁻¹ in both control and methanol treated reactors. However, significant increase in effluent P content was recorded in both sodium acetate and glucose treatments indicating that phosphorus was released from the bacterial cells during the anoxic stage. The amount of P-release in these two treatments was related to the concentrations of the carbon substrate used.     

基于网络拓扑和节点兴趣的P2P搜索机制

对于搜索机制而言,终端用户的反应时间是最重要的性能指标.在P2P系统中,终端用户的反应时间多由网络传输时间决定.提出了一种基于网络拓扑和节点兴趣偏好的P2P搜索机制,使终端用户在进行资源搜索时尽量命中在拓扑上与自己最近的,兴趣偏好也最接近的节点,减少路由距离和转发查询消息副本的数量,最小化网络传输时间,提高查询效率.     

基于PowerBuilder的HIS客户端的桌面快捷方式管理程序设计

利用Powerbuilder9．0编程实现医院信息系统工作站中客户端的桌面快捷方式的管理功能,可在实际应用中大大减轻信息科工作人员的维护工作量。     

废水处理生物处理高效硝化新工艺

对短时硝化、短程硝化反硝化、同时硝化反硝化及缺氧硝化等生物脱氮新技术的研究和开发进展进行了分析，在理论研究的基础上，提出了生态优势硝化反硝化生物脱氮新工艺，并指出了生态优势硝化反硝化新工艺的特点和研究开发应用的前景。     

距离寻优中Dijkstra算法的优化

Dijkstra算法在求解两指定顶点间最短距离时,对两顶点之间最短路径以外的大量顶点进行了计算,而影响了算法的速度。在对Dijkstra算法分析的基础上,结合网络模型的特点,对Dijkstra算法进行了优化。优化算法基于两点之间直线最短的思想,改变了对顶点处理顺序的规则。在算法流程中只对最短路径上及其附近的顶点做了处理。而与最短路径相距较远的顶点基本不涉及。因此,在优化处中计算的顶点数量大幅减少,提高了算法的速度,给出了优化算法的正确性证明,对优化算法的实用性和效率加以讨论,优化算法在实际中已经得到应用。     

海水盐度对A/O生物系统处理效果的影响

试验采用A/O工艺,在进水COD为500-600 mg/L,NH3-N为80-90 mg/L,pH7.0-8.0,溶解氧为2-3 mg/L,温度为18-25℃的条件下,分别研究了不同海水盐度（10%,30%,50%,70%海水比例）对有机物及NH3-N去除效果的影响,对系统短程硝化的影响,以及对活性污泥结构与沉降性能的影响.结果表明：海水盐度在30%范围内,经驯化稳定后,系统对COD和NH3-N的去除率均可达到90%左右,NH3-N去除率受盐度影响程度相对更小;控制海水盐度在30%以上,系统可实现短程硝化;海水盐度为50%时,亚硝化率可达到97%,且较为稳定;随海水盐度的增加,污泥絮凝体由开放、疏松变得封闭、紧密,SVI不断下降.     

高空无人侦察机生存力仿真研究

文章分析了高空无人侦察机的敏感性、易损性与生存力之间的关系.建立了高空无人侦察机生存力模型.通过仿真对高空无人侦察机生存力及主要影响因素--高空无人侦察机的航路捷径、飞行高度、飞行速度及雷达散射截面积RCS进行了研究.仿真结果表明,高空无人侦察机生存概率随航路捷径的增大、飞行高度的增高、飞行速度的提高及RCS的减缩呈阶梯状增加;而在相同生存概率的条件下,上述的生存力增强措施均能增加高空无人侦察机的突防距离.     

高氮豆制品废水的短程硝化反硝化脱氮技术及其过程控制

采用交替好氧 /缺氧运行方式和适时过程控制策略开发了一种生物脱氮新工艺 ,该工艺结合了短程硝化反硝化脱氮技术。试验过程中选择了 3种不同运行模式去实现短程硝化反硝化脱氮技术 ,即传统的序批式活性污泥法 (SBR)运行模式、固定时间控制交替好氧 /缺氧运行模式和适时过程控制交替好氧 /缺氧运行模式。结果显示 ,适时过程控制交替好氧 /缺氧运行模式效果最佳 ,它不但能提高硝化、反硝化速率和减少总反应时间 ,而且可以节省硝化过程中碱度的投加和反硝化过程碳源的投加量 ,降低了运行成本。     

用Excel表格计算工程量的方法和技巧

结合工程具体情况，对利用Excel表格计算工程量的优越性作了介绍，提出了进行工程量投标预结算的方法，指出此法对于数据的审核校对也具有明显的优越性。