UNIX主机行为监控系统的设计与实现

该文介绍了Unix主机行为监控系统在大型网络中的应用及作用,并提出了具体的设计方案与实现方法。该系统主要采用透明的方式串接在工作区域和服务器群之间,利用网卡零拷贝的技术保障业务流量不会产生瓶颈,同时利用bypass的技术来保障服务器群的高可用性,既能保证服务器群的安全,又不会给网络带来附加的影响。     

Two-step flotation recovery of iron concentrate from Donganshan carbonaceous iron ore

The flotation of pure and natural carbonaceous iron ore samples in the oleate flotation system was investigated. Starch can depress hematite effectively in a wide pH range, but cannot depress siderite efficiently in neutral conditions. The flotation recovery of pure hematite, siderite, and quartz in the oleate-starch-CaCl₂ system is significantly different when the slurry pH varies from 4 to 12. A novel two-step flotation process was developed for the separation of iron concentrate from Donganshan carbonaceous iron ore through which the siderite concentrate is first recovered and the high quality hematite concentrates with relative high iron recovery can be obtained in the second step flotation. The siderite concentrate may be utilized directly or undergo further concentration steps to increase iron grade.     

空间网络数据库中基于M-tree索引的反最近邻查询算法

欧式空间中的反最近邻查询算法不适用于空间网络环境,故采用任意度量空间中的M-tree索引结构,进行空间网络数据库中的反最近邻查询处理。首先通过预计算的方法得到网络距离信息,依据此距离信息,对空间网络对象建立M-tree索引结构。然后,给出并证明了M-tree中间结点修剪定理,提出一种适用于空间网络环境的反最近邻查询算法。最后实验验证了该算法的有效性。     

一种板形检测值处理方法的开发及应用

介绍了一种用于接触式分段板形仪的板形检测信号处理方法及处理流程．用该方法处理板形检测信号不需要计算带钢在板形仪上形成的包角．该法编制成程序后,作为一个模块被应用在一台可逆冷轧机的板形控制系统中．轧机投入运行后,生产稳定,并取得了良好的板形控制效果,平均板形偏差控制在5I以下,表明该方法是稳定、有效的,可以用于工业生产．     

Fault location for parallel transmission lines using one-terminal current traveling waves

With proper phase module transformation,parallel lines can be decomposed to the same directional net and the reverse directional net. The propagation characteristics of traveling waves in the reverse directional net were analyzed,and the refraction coefficient at the fault point for a single phase fault was derived. In addition,the module selection was discussed. Simulation results show that satisfying accuracy can be achieved with the proposed method. Moreover,it is immune to fault types,fault resistances,and outside system parameters.     

基于精度控制的凸轮反求实践

精度控制是反求实践研究的一项重要内容.论文分析了精度控制的必要性,给出了精度误差的评价标准,通过对打纬共轭凸轮反求实践中各环节的精度控制,有效的控制了反求误差,实现了凸轮的高精度反求,提高了凸轮反求的品质.     

基于逆向工程的扩展OpenC~（＋＋）静态分析方法研究

文章提出了一种基于逆向工程项目的扩展OpenC＋＋静态分析方法。探讨了抽取静态信息的OpenC＋＋扩展策略,容错解析技术和嵌套定义类、结构体的识别与处理等方面的问题,介绍了采用XML文件进行静态信息的存储方法。     

阳离子染料在D5反相微乳体系中的染色性能研究

分析阳离子染料在D5反相微乳体系中染色的可行性,确立阳离子染料在D5反相微乳体系中上染腈纶织物的工艺,并探讨入染前织物带液率、反相微乳液含水量对染色性能的影响。实验结果表明:腈纶织物在温度为60℃、pH值为4.5~5的水中进行预处理后,以一定带液率入染反相微乳体系的方法可行;优化的阳离子染料在D5反相微乳体系中的染色工艺为:染色温度85℃、染色时间20 min、浴比1∶10;研究中还发现入染前织物带液率的高低对织物得色深度有较大影响,随着带液率的增加,染色K/S值先增加后减少;反相微乳体系的含水量对织物的得色深度无明显影响。     

反渗透-电去离子脱盐系统

介绍了反渗透－电去离子（RO－EDI）脱盐系统的特点和应用，RO－EDI脱盐系统具有出水质量高，连续生产，使用方便，无人值守，不用酸碱，不污染环境，占地面积小，运行经济等一系列优点，重点说明制备国产EDI设备中所用的材料（离子交换膜和离子交换剂）及寺充物填充方式等有关问题。指出推广RO－EDI脱盐系统的当务之急是制备国产设备，等空隙填充法为制备EDI设备提供了一种良好的填充方式。     

Operation of a catalytic reverse flow reactor for the purification of air contaminated with volatile organic compounds

Catalytic oxidation in a reverse flow reactor is an attractive process for the decontamination of air polluted with volatile organic compounds (VOCs). In this paper several aspects of operating this type of reactor for air purification under strongly varying conditions will be discussed. For a successfit operation of such reactor a minimum amount of combustibles is required, and a simple theory is developed to predict this minimum value. This minimum amount is strongly influenced by the reaction kinetics, the heat transport in the packed bed and the adiabaticity of the reactor. To cope with a too low temperature level in the reactor for a complete conversion, an electrical heating device should be installed in the centre of the reactor bed to increase locally the temperature rapidly and efficiently. To control the maximum temperature in case of too high concentrations, extra air should be added to the feed.