粘土矿物及钻井液电动电位变化规律研究

分析了导致粘土矿物膨胀分散的原因．研究了粘土矿物的电动电位(ζ电位)变化规律；提出了粘土矿物及钻井液电性的转变方法。即有机正电处理剂法、有机正电MMH处理剂法、电解质处理法、非离子型聚合物处理法、调整pH值法等。引起粘土矿物膨胀、分散的因素较多．除取决于组成粘土矿物组分和结构外，还与颗粒表面交换阳离子成分、分散介质性质等有关；粘土矿物的分散、膨胀、收缩、坍塌、渗透等特性均与C电位的大小有密切关系．因此．可用C电位的大小来判断粘土矿物的膨胀、分散性能及钻井液的抑制性能等。只要钻井液的ζ正电位高，对粘土矿物的抑制能力就强．就能达到稳定井眼、提高钻井速度、保护油气层、减少环境污染的目的。研究结果表明，无机盐具有压缩双电层的作用．交换阳离子价越高，水化膜越薄，ζ负电位越小．抑制性增强。反之。交换离子价越低，水化膜越厚，ζ负电位越高，分散性增强；阳离子处理剂具有提高钻井液ζ正电位的作用，能使粘土-水分散体系的电性发生反转；正电胶既可使粘土颗粒电性由负向正转化．又保持粘土-水分散体系的稳定性。通过对膨胀渗透理论与双电位理论研究，认为二者是统一的。     

井-地电位成像技术研究剩余油分布

井—地电位测量是在地表向注水井中套管施加一个大电流，通过测量地表加注高矿化度的导电流体前后的电位分布，经数据处理及反演计算，求出注水各小层的电阻率分布，进而计算出各小层的剩余油饱和度分布状况，指出油藏的挖潜方向。从临17—22井区应用情况来看，与生产动态符合较好。     

A simplified cascade current‐source inverter interconnected to a single‐phase three‐wire distribution system and its application to electric energy storage systems with batteries

A novel current source inverter system interconnected to the single‐phase grid is proposed. It has the same construction as the conventional three‐phase current source inverter that is interconnected to the single‐phase three‐wire distribution system. Though the proposed circuit has no output transformer, it can be equivalently performed as the single‐phase double cascade inverter by diverting the pole transformer in the utility system. By controlling the appropriate scheme, the output currents can be obtained as the five‐level waveforms and their distortions can be decreased sufficiently. It is applied to the interactive electric energy storage system with batteries and the basic discharging characteristics are discussed experimentally. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 150(2): 50–61, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10380     

电力地理信息系统外业数据采集编码方案的探讨

本文介绍了配电电力地理信息系统外业数据采集编码的方法；其中包括线路编码、点编码、线路分界点编码、变电所的编码、开关的编码方法等。     

Measuring the load eccentricity in helical compression springs

An experimental device able to detect the load eccentricity in helical compression springs is described. The theory underlying the resolution of measured bending strains of the apparatus into effective load eccentricity is discussed. Laboratory results are offered for heavy duty springs and compared to theoretical estimates retrieved from the literature.     

直流电弧炉长弧泡沫渣技术

本文指出了直流电弧炉采用长弧泡沫渣技术的必要性及该技术的发展现状，总结了炉渣物理性质，化学成分，温度和气源等对炉渣泡沫化的影响，并介绍了电炉泡沫渣的操作工艺及实际应用效果，对宝钢三期１５０ｔＤＣ－ＵＨＰ电弧炉的泡沫渣工艺提出了看法。     

Macroscopic model for multispecies ion-exchange kinetics

A model for multispecies ion-exchange kinetics based on the Nernst-Planck equation is suggested. It is analyzed in comparison with the “locally-determinate” model described by Hwang and Helfferich [1]. The model makes possible simple computation. The conditions for the occurrence of unusual kinetic curves with a maximum are clarified. The proposed model is developed for different types of kinetic problems and verified by the experimental investigation of a kinetics in ternary systems.     

邯邢地区发展直接还原铁的优势与前景

根据目前我国炼钢生产情况，废钢供应市场预测，以及我国直接还原技术发展状况，在介绍邯邢地区矿产资源优势及优越的区位环境基础上，提出观点，认为邯邢地区发展直接还原傻铁生产优势明显，经济可行，前景广阔。     

汽轮机凝汽器液位自调优化改造方案

某公司热电联供50MW汽轮发电机组凝汽器液位自调原设计只用化学补充水进行调节,但经实际运行结果验证此方案不能有效控制液位,经改造在凝结水泵出口加调节阀进行控制,取得了良好效果。重点介绍了3种方案的优化选择。     

电动自行车转矩脉动抑制分析与实现

针对电动自行车生产中如何抑制转矩脉动的问题,结合理论分析,提出采用换相电流闭环控制方法。