应用岩电实验资料确定束缚水饱和度

以塔里木东河油田１１井的岩电实验资料和油基泥浆取心资料为基础，采用ＤＰＳＭ模型，对确定地层的束缚水饱和度进行了研究．结果证明，由岩电实验资料数据拟合迭代求出的束缚水饱和度，与油基泥浆取心分析含水饱和度吻合很好．这说明应用岩电实验资料来确定束缚水饱和度的方法是可行的，值得加以运用和推广     

Enhancement of figure of merit (ZT) by doping Bi in Mg2Si for energy harvesting applications

Magnesium Silicide is one of the interesting thermoelectric materials known for relative abundance of its constituents, thermal stability, non-toxicity and environmental friendly nature. In this paper we have theoretically studied Bi doped Mg_2Si. The electronic structure calculations predict non-existence of the energy gap for Mg_2Si_(1-x)Bi_x with(0.125≤ x≤0.5). It has been found that the system with x=0.125 exhibits highest Seebeck coefficient and electrical conductivity. Due to low thermal conductivity at x=0.125, Mg_2Si_(0.875)Bi_(0.125) attained maximum value of dimensionless figure of merit 0.67 at 1200 K. With increase in concentration of Bi,the value of figure of merit decreases.     

Development of lead-free multifunctional materials Bi(Co0.45Ti0.45Fe0.10)O3

A lead free multiferroic material,Bi(Co_(0.45)Ti_(0.45)Fe_(0.10))O_3(BCTF45/10)was synthesized by a solid-state reaction route at high temperatures.BCTF45/10 powder was prepared using appropriate raw maretials in oxide powders with methanol medium.As-prepared circular shaped pellets were sintered at 1053 K for 6 h to produce a compact form.Preliminary structural properties and elemental analysis were determined using X-ray diffraction and energy-dispersive X-ray spectroscopy techniques respectively at room temperature.The microstructure or surface morphology of the sintered sample was carried out by using field emission scanning electron microscope(FE-SEM).The XRD analysis shows that the compound exhibits the single-phase of orthorhombic symmetry.The average crystallite size estimated using the Scherrer's technique was found to be 30 nm.The influence of Co and Ti substitution(at Bi and Ti sites of Bi Fe O_3)on some physical and electrical properties of Bi Fe O_3was examined by using phase sensitive multimeter in a wide frequency and temperature ranges.The magnetic nature of the sample was studied using vibrating sample magnetometer.Study of room temperature magnetic hysteresis loop exhibits the enhanced ferromagnetic characteristic with saturation magnetization of 5.091 emu/g and coercive field of 0.213 k Oe respectively.The enhanced magnetic properties highlight various potential applications of Co/Ti doped BCTF45/10 materials.     

四硫富瓦烯衍生物及其金属配位化合物的研究现状及发展前景

本文概述了四硫富瓦烯衍生物及其金屑配合物的研究进展及现状,并举几种典型的四硫富瓦烯衍生物及其金屑配合物。分析了它们的结构和导电机理,简述了研究热点及其发展趋势．     

FLASH在开发《电机及拖动基础》CAI课件中的应用

网上流行的矢量动画软件ＦＬＡＳＨ, 其生成文件小巧, 动画支持无级放大, 便于传播、上传站点－ 本文通过应用ＦＬＡＳＨ 开发《电机及拖动基础》ＣＡＩ课件的实践, 介绍开发中一些具体问题的解决方法以及ＦＬＡＳＨ 的应用经验和技巧     

Ca3Co4O9＋6与Ca2Co2O5的制备与电学性能研究

采用溶胶一凝胶与热压烧结相结合的方法制备了Ca3Co4O9＋6与Ca2Co2O5热电材料．x射线衍射（XRD）测试结果表明,两种材料均沿C轴有择优生长趋势．从样品的扫描电子显微照片（SEM）来看,两种材料已烧结,基本达到致密的程度．在室温至1073K温区,测试了样品的电导率和Seebeck系数．结果表明,两种材料电输运性能均随温度升高而增加,Ca3Co4O9＋8。样品的电导率、Seebeck系数和功率因子明显高于Ca2Co2O5．     

电潜泵极限下泵深度的探讨

电动潜油泵是油田进入中后期开发阶段强有力的机械采油方法之一,在世界各主要产油国内均得到了较广泛的应用.本文从潜油多级离心泵泵抽的强度、刚度问题入手,应用纵横弯曲连续梁理论,探讨电潜泵的极限下泵深度。文末以国产200m3/日电潜泵为例,说明了有关参数衬泵轴的变形及强度影响的趋势.并对计算结果进行了分析讨论。     

天然气井腐蚀监测系统的应用研究

基于电化学弱极化测试原理开发出一种天然气井腐蚀监测系统,现场应用结果表明,符合电化学测试要求,测试精度高,可靠性和数据重现性好,能有效监测腐蚀变化的动态趋势。     

防范输配电市场中规制合谋的“I+P”机制

针对现有输配电市场中规制合谋研究多为经验性描述而缺乏理论工具分析的现实,本文基于组织合谋理论的P-S-A分析框架,构建了"政府/规制者/电网企业"三层次代理模型,考虑在激励机制中加入惩罚策略(简称"I+P"),分别进行输配电市场中防范规制合谋"I+FP"机制以及"I+VP"机制的设计,并进一步比较两种机制下不同类型企业输配电量和防范合谋效率,这对于当前电力体制改革下所进行的输配电改革是有意义的。     

基于EDA9033E的交流电参数测量

EDA9033E是交流电参数测量模块,可以实现有功功率、无功功率、功率因素等电参数的测量。本文重点介绍了它的引脚和应用情况,供大家参考。