Effects of surface charge, micro-bubble size and particle size on removal efficiency of electro-flotation.

Flotation is a water treatment alternative to sedimentation, and uses small bubbles to remove low-density particles from potable water and wastewater. The effect of zeta potential, bubble size and particle size on removal efficiency of the electro-flotation process was investigated because previous model-simulations indicated that these attributes are critical for high collision efficiency between micro-bubbles and particles. Solutions containing Al3+ as the metal ion were subjected to various conditions. The zeta potentials of bubbles and particles were similar under identical conditions, and their charges were influenced by metal ion concentration and pH. Maximum removal efficiency was 98 and 12% in the presence and absence of flocculation, respectively. Removal efficiency was higher when particle size was similar to bubble size. These results agree with modelling simulations and indicate that collision efficiency is greater when the zeta potential of one is negative and that of the other is positive and when their sizes are similar.     

Synthesis of amphiphilic magnetic microspheres by dispersion copolymerization of styrene and poly(ethylene oxide) macromonomer

Amphiphilic magnetic microspheres ranging in diameter from 5 to 100 µm were prepared by dispersion copolymerization of styrene and poly(ethylene oxide) vinylbenzyl (PEO‐VB) macromonomer (MPEO) in the presence of Fe₃O₄ magnetic fluid. The effects of various polymerization parameters on the average particle size were systematically investigated. The average particle size was found to increase with increasing styrene concentration and initiator concentration. It also increased with decreasing stabilizer concentration and molecular weight of MPEO. The content of the hydroxyl groups localized in the microspheres ranged from 0.01 to 0.2 mmol g^?1. © 2003 Society of Chemical Industry     

RFT地层测试器与3700测井系统的配接

文章介绍了如何转换CSU系列地层测试器RFT的上传信号，使其能够适应3700测井系统的采集、处理和记录。从而使CSU系列的地层测试器能够配接3700测井系统。     

汽油烃类族组成测试方法对比

介绍了使用荧光指示剂吸附色谱法、多维气相色谱法的测定影响因素和近红外光谱快速法的分析特点以及三种方法在汽油族组成测定中的应用，并就三种方法对同一试样的测定结果进行了对比，找出各种测定方法容易产生误差的原因及分析对策。     

项目管理信息系统在西部管道工程中的应用

系统地阐述了西部管道工程信息管理系统的建设和应用，根据实际应用情况提出了有待改进的工作。以西部管道为例，详细介绍了大型工程，特别是大型长输管道工程信息管理系统的建设目标、设计原则、功能特点、整体结构和功能模快组织，以及信息系统对工程项目管理的支持作用，对于改进和提高大型工程信息管理系统的建设和使用，提升大型工程项目管理水平具有积极意义。     

磺基琥珀酸双2-丁基辛酯钠盐的合成及表面活性测定

以马来酸酐和2-丁基辛醇为原料,经酯化得到相应的双酯,以乙醇作混相促进剂,使双酯与亚硫酸氢钠进行磺化反应,合成了磺基琥珀酸双2-丁基辛酯钠盐。采用正交试验对酯化反应条件进行了优化。合成产物的临界胶束浓度(cmc)值为3.58×10-6mol/L,表面张力(γcmc)为27.568mN/m。     

基于FPGA技术的可重构软测量系统

介绍了一种基于FPGA（Field Programmable Gates Array）技术的可重构的软测量系统。该系统由一个单片机控制着一片FPGA芯片，芯片上配置的软测量模型在一个BP人工神经网络模型及其训练模型之间切换（即重构）。该系统在实际中有广泛的用途，如测量工业生产中的过程变量、生物体内部状态、海洋探测、空间设备等。     

Study on Laboratory Method for Refining of SR Diesel Fuel

The method for refining the straight-run diesel fuel was studied in laboratory scale in order to make the acid number of diesel fraction comply with the standard while removing the naphthenic acids contained in diesel without causing environmental pollution. After comparing the effect of refining using three solvents, the isopropyl alcohol-HOA was specified as the best solvent. Meanwhile, the relationship between the acid number of diesel fraction and the amount of solvent used and the relationship between the concentration of solvent and temperature and the stability of diesel in terms of its acid number were also investigated. Experimental results had shown that when the mass fraction of the HOA-IPA solvent was 20% at a dosage of 17 mL of the solvent and a temperature of 30℃, the acid number of the refined diesel fraction was 0.015 mg KOH/g with a good stability of acidity in the diesel fraction,     

FF现场总线的网段负载能力的设计及计算

从生产安全运行的管理要求；电压压降和电流的限制及信号的衰减；网络运行时间的要求；系统设计的影响；备用能力的考虑等各个方面，结合上海赛科聚苯乙烯项目的具体设计，分析隔爆条件下FF现场总线的H1网段负载能力的设计，以供大家探讨。     

大位移井钻柱振动规律研究与应用

在大位移井钻井工程中钻柱受着各种振动，当各种振动共振时，钻柱承受着非常大的动载，很容易受损，同时，钻柱的振动影响着井壁的稳定，严重威胁着井下的作业安全。以大位移井近井底的钻柱为研究对象，分析了钻柱振动行为所遵循的规律。采用线性分析法，获得了大位移井钻柱横向振动和扭转振动的频谱方程。同时获得了钻柱各种共振频率的分布。经分析表明：大位移井钻柱的横向振动和扭转振动的共振频率与实际钻井转速非常接近，应合理选择转速以减小钻柱共振的发生。文章的分析研究为大位移井钻柱动态行为的研究提供了理论依据。