An analysis of the electrical conductivity in BaSO4-added Ag2SO4 solid electrolyte system

The compositions (1 −x)Ag₂SO₄−(x)BaSO₄, wherex=0·01 to 0·6, were prepared by slow cooling of the melt. The extent of the solid solubility of Ba²⁺ in Ag₂SO₄ was determined by X-ray powder diffraction and scanning electron microscopy. The bulk conductivity of each sample was obtained using a detailed impedance analysis. The partial substitution of Ba²⁺ results in the enhancement of conductivity in compliance with the classical aliovalent doping theory. A simplistic model based on lattice distortion (expansion) due to partial substitution of Ag⁺ by the bigger Ba²⁺ has been considered to explain enhanced conductivity. Beyond solid-solubility limit (5·27 mole%) the BaSO₄-dispersed Ag₂SO₄ conductivity follows the usual trend seen in binary systems. An increase in conductivity in this case is discussed in the light of interfacial reactions and surface defect chemistry. The maximum conductivity in 20 mole% BaSO₄ dispersed Ag₂SO₄ is due to percolation threshold.     

Decision Support System for Stakeholder Involvement

Stakeholder involvement is essential to the development of a total maximum daily load (TMDL) and its implementation plan. A tool, beyond a simulation model, is needed to support the decision making process that requires negotiation and compromise among stakeholders. The decision support system (DSS) described herein has a TMDL module to calculate various combinations of point and nonpoint loads that can meet the water quality criteria. Its Consensus module allows stakeholders to formulate, evaluate, modify, and vote for alternatives. The DSS displays bar charts for pollution loads from various subwatersheds and attributes the nonpoint loads to land uses. The water quality consequence of the pollution loads is output in maps, which shows sections meeting criteria in green and those not in red. The DSS requires a front end effort of site specific adaptation and model calibration. An Internet-based stakeholder process was developed to allow more concerned citizens to participate in management decisions.     

注水开发油田砂砾岩储层含油饱和度解释模型

本文利用常规测井资料,结合储层岩性、物性、含油性之间的地质规律,解决了储层岩石粒度变化及水淹层混合水电阻率变化对储层电阻率的影响;研究出了一种对电阻率测井资料标准化的校正方法;建立了储层原始、剩余、残余油饱和度解释模型。计算的储层原始、剩余、残余油地质储量,经生产验证相对下误差小于10％;计算产水率,试油验证平均绝对误差小于10％;划分水淹油层等级,试油验证符合率在80％以上。     

分析再热器超温爆漏与水冷壁结焦控制量的关系

文章介绍了宝钢自备电厂在改善锅炉燃烧工况，控制锅炉水冷壁结焦所采取的技术措施，分析了锅炉水冷壁结焦量与锅炉二次再热器烟气出口平均温度的关系，为解决锅炉水冷壁结焦所引发的二次再热器超温爆漏问题提供了依据。     

测井岩性类比解释法及应用

利用理想的地质体积模型和电阻率测井的供电电流流过模型的导电机理,推导出一种不需要含水饱和度参数即能定量计算含水饱和度的方法,即岩性类比解释法。经过初步实践,该方法应用于砂泥岩地层的测井分析,效果良好。     

岩心PI值试验研究及应用

主要论述了在多功能采油化学用剂评价仪上进行的岩心ＰＩ值试验的步骤，现象及结论。重点考察了岩心ＰＩ值与渗透率、流量及注入截面面积的关系；平行管岩心复合ＰＩ值和其中单管岩心ＰＩ值的关系。     

The solubility of solidified bromoethane C2H5Br in liquid nitrogen at 77.4 K

The solubility of solidified bromoethane C₂H₅Br in liquid nitrogen at 77.4 K has been investigated. A combination of filtration and gas chromatography methods were used. The experimental value of the solubility of solidified bromoethane in liquid nitrogen at 77.4 K was compared with the solubility of halogenhydrocarbons previously investigated. The Preston-Prausnitz method was used for estimation of the solubility of bromoethane in liquid nitrogen and the value of the I₁₂ parameter was calculated.     

大庆长垣南部油田周期注水的做法及效果

本总结了大庆长垣南部周期注水的做法和效果。实践证明，在低渗透，薄油层，单井低注低产的油田上实施周期注不仅能够改善油田开发状况，而且也为低注井的冬季管理提供了方便条件。     

谈节水灌溉的推广应用

全面推行节水灌溉势在必行，结合江西省上饶地区节水灌溉的推广工作，总结经验，提出了相应的对策和建议。