就地补偿在动力厂水泵电机上的应用实例

就我公司动力厂给水车间155kW水泵电机无功就地补偿的可行性及经济效益进行了分析和研究，对工厂用电如何节能降耗有一定的参考价值。     

中铝河南分公司矿山在土地复垦中的有益探索

分析了铝土矿露天开采和土地、环境之间的利害关系，并对矿山公司“土地复垦”工艺技术进行了阐述，介绍了中铝河南分公司矿山公司方面的具体作法和成功经验。     

“四低一高”工艺在85kA预焙槽的应用与优化

本文介绍了“四低一高”(低电解温度、低分子比、低氧化铝浓度、低阳极效应系数、高工作电压)工艺技术条件在85kA预焙槽上的应用与优化,实验证明“四低一高”工艺需要针对具体槽型进行优化设计,适宜的技术条件对提高电流效率、降低直流电耗,节能效果显著。     

电接点压力表补水泵定压系统的应用

阐述了电接点压力表补水泵定压系统的一些应用问题 ,给出了电接点压力表定压点的上、下限计算公式 ,并提出了该系统补给水泵、补给水箱及安全阀的设计选型方法     

An analysis of shielding against DC magnetic fields generated by electric railways. Evaluation of effective permeability of fine structure

This paper describes an effective analysis of magnetic shielding based on homogenization. The analyses become time‐consuming if the problems include the magnetic substances having fine structure. The homogenization of the structure makes it possible to analyze effectively the magnetic fields. The authors introduce a method to estimate the effective permeability of the homogenized substance. This method can be applied to any periodic structure made of magnetic substance. The magnetic shielding effects by the structures against direct‐current (DC) fields generated by electric railways are analyzed by using the present method. As a result, it is found that the overhead way and the protective fence near the railway work as a magnetic shield, whose effects can be improved by appropriate arrangement of those constructions. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 160(4): 7–15, 2007; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20310     

油管电热清防蜡技术在强水敏油田的应用

江苏油田的庄 2、韦 2油田属强水敏油田 ,采用热 (水 )洗油井和化学清防蜡效果较差 ,两油田每年因洗井造成地层污染影响的产量损失在 5 0 0 0t以上 ,约占油田产量的 4 5 %。根据集肤效应 ,采用油管电热清蜡技术 ,在含水小于 6 0 %、井斜小于 4 0°的油井上可正常使用 ,一般通电加热 4 0～ 80min后 ,油井井口温度能达到 5 0℃左右 ,最高可达到 6 5℃以上 ,连续加热 5～ 6h即可达到清蜡目的 ,电热清蜡为周期 6 0～ 90d。影响电热清蜡主要指标因素是油井的产液量 ,产液量越小 ,所需要的加热电流和加热电压也越小 ,井口温度达到最高值越低 ,清蜡效果越差。试验的 7口井平均年度投入产出比达到 1∶5 ,经济效益和社会效益十分明显。     

A Simple Constraint-Based Algorithm for Efficiently Mining Observational Databases for Causal Relationships

This paper presents a simple, efficient computer-based method for discovering causal relationships from databases that contain observational data. Observational data is passively observed, as contrasted with experimental data. Most of the databases available for data mining are observational. There is great potential for mining such databases to discover causal relationships. We illustrate how observational data can constrain the causal relationships among measured variables, sometimes to the point that we can conclude that one variable is causing another variable. The presentation here is based on a constraint-based approach to causal discovery. A primary purpose of this paper is to present the constraint-based causal discovery method in the simplest possible fashion in order to (1) readily convey the basic ideas that underlie more complex constraint-based causal discovery techniques, and (2) permit interested readers to rapidly program and apply the method to their own databases, as a start toward using more elaborate causal discovery algorithms.     

H9000系统在西北电网水调自动化系统工程中的应用

西北电网水调自动化系统主要用于自动采集管理西北电网分布在三大水系的8个水电厂、相关流域内100个水文站、200个雨量站的实时信息，以便实现水库群跨流域补偿，统一协调发电与防洪、排沙、防凌、灌溉等一系列矛盾，解决水库群综合利用问题．系统主要具有上。下特点：（1）开放的系统环境；（2）高可乘性；（3）多样化的数据规约；（4）开放的人机联系手段；（5）务性能的数据库；（6）丰富的水调应用软件．其中水调应用软件包括：（1）汉江上游石泉、安康梯级联合洪水预报；（2）黄河上游龙羊峡、李家峡、刘家峡两库三站短期（日）调度；（3）水务综合统计分析软件．西北水调自动化系统将使H9000系统在大规模网络关系数据库管理技术、高级图形处理技术、复杂网络组网技术、容措技术、水调高级应用软件技术等方面提高到一个更高的水平．     

替代进口梳棉机测厚传感器集成电路芯片分立元件的电路设计

介绍了替代进口梳棉机测厚传感器集成电路分立元件的电路图，工作原理及特点。一年多的实际运行证明，电路参数达到了设计要求。     

我国钨业“四矿”问题及其对策思考

简要回顾了我国钨矿业悠久的历史、资源的优势、技术的进步和卓越的贡献 ;20世纪80年代中期以后 ,逐步陷入困境 ,举步维艰的主要表现 ;以及在解决“四矿”(矿业、矿山、矿工、矿城)问题中的艰苦经历。指出应在“四矿”问题讨论中做更多、更深的对策思考 ,并对钨业的“四矿”问题加以重点研究。