千米桥东潜山天然气地球化学特征及成因探索

通过地化分析，结合地质条件等，对千米桥东潜山天然气地球化学特征进行了剖析，并对其气藏的形成进行了探索，结果认为：千米桥东潜山天然气为无机二氧化碳、偏腐殖型有机气，腐泥型有机气的复合气，主源为东部歧口凹陷沿岩带深层（偏）腐殖型气，烃类气体聚集时间晚，为更新世明化镇沉积时其，而无机二氧化碳聚集时间早于烃类气体；与千米桥凝析气藏不同的是该气藏CO2含量高。     

南海东部油田高产稳产开发实践

南海东部海域是中国海洋石油总公司对外合作勘探、开发的主要海域之一 ,自 1990年以来 ,该海域已有 12个油田相继投入开发 ,其中包括 11个砂岩油田和一个礁灰岩油田。在开发初期 ,这些油田多数被评价为边际油田 ,通过中外双方近 10年的共同努力 ,在开展不同阶段精细油田地质和油藏工程研究的基础上 ,结合该海域油田地质及开发特征 ,采用目前世界上先进的开发技术和开采工艺 ,取得了良好的开发效果和经济效益 ,并积累了一套具有海上油田特点的开发经验和作法 ,在油藏工程和油藏管理方面也取得了较大成功。文中通过展示南海东部油田地质及开发特征、开发现状和开发效果 ,剖析了油田开发技术 ,总结了油田开发经验 ,介绍了油田开发形势以及开发潜力     

企业培训中心的六个主要特征

提出企业培训中心的本质特征,并以此为基点阐述企业培训中心的六个主要特征;通过对企业培训中心的使命、培训对象的确定、培养目标、培训内容、组织设置、组织发展的分析,力求揭示企业培训中心组织构建和发展的自身规律。     

西门子全集成自动化理念初探

系统阐述了全集成自动化理念的内涵，指出其特点在于统一的数据管理、统一的编程组态、统一的通讯以及无与伦比的开放性，其中采用WINCC与STEP7两个软件进行了说明，井提出全集成自动化应用将是今后自动化技术发展应用的方向。     

Ring‐opening polymerization of D,L‐lactide by rare earth 2,6‐dimethylaryloxide

Ring‐opening polymerization of D,L ‐lactide (LA) has been successfully carried out by using rare earth 2,6‐dimethylaryloxide (Ln(ODMP)₃) as single component catalyst or initiator for the first time. The effects of different rare earth elements, solvents, monomers and catalyst concentration as well as polymerization temperature and time on the polymerization were investigated. The results show that La(ODMP)₃ exhibits higher activity to prepare poly(D,L ‐lactide) (PLA) with a viscosity molecular weight of 4.5 × 10⁴ g mol^?1 and the conversion of 97 % at 100 °C in 45 min. The catalytic activity of Ln(ODMP)₃ has following sequence: La > Nd > Sm > Gd > Er > Y. A kinetic study has indicated that the polymerization is first order with respect to both monomer and catalyst concentration. The apparent activation energy of the polymerization of LA with La(ODMP)₃ is 69.6 kJ mol^?1. The analyses of polymer ends indicate that the LA polymerization proceeds according to ‘coordination–insertion’ mechanism with selective cleavage of the acyl–oxygen bond of the monomer. Copyright © 2004 Society of Chemical Industry     

Complementary effects of solid lubricants in the automotive brake lining

An experimental investigation was carried out to examine the tribological behavior of NAO (non-asbestos organic) type brake linings containing different volume ratios of graphite and antimony trisulfide (Sb₂S₃). A scale dynamometer was used for friction tests and particular emphases were given to the effect of applied pressure, sliding speed, and temperature on the coefficient of friction according to the relative amounts of the two solid lubricants. Results showed that the brake linings with both solid lubricants exhibited better friction stability and less speed sensitivity than the friction materials containing a single solid lubricant. In particular, the brake lining containing higher concentrations of graphite showed better fade resistance than others during high-temperature friction test.     

水力压裂净压力拟合分析解释技术研究与应用

基于三维裂缝延伸模拟模型的水力压裂净压力拟合分析解释技术,提出了净压力拟合分析解释的一般步骤及理论方法,研究了现场监测净压力的计算方法,并介绍了其在现场施工中的应用情况。该技术可以帮助认识地层参数和压裂参数,提高压裂施工成功率和有效率。     

A new approach to study organic solar cell using Lambert W-function

Organic photovoltaic solar cells bear an important potential of development in the search for low-cost modules for the production of domestic electricity. One of the main differences between inorganic and organic solar cells is that photo-excitation in these materials does not automatically lead to the generation of free charge carriers, but to bind electron–hole pairs (exciton) with a binding energy of about 0.4 eV. Till now various numerical methods using approximations have been reported to study different aspects of organic solar cells. For the first time an accurate method using Lambert W-function is presented to study different parameters of organic solar cells.     

Analysis of S-SEED''s characteristics in optical switch

This article introduces the basic structure of a symmetric self-electrooptic effect device （S-SEED）, and applies the Kirchoff＇ s current law and a purely equivalent capacitive model, to analyze S-SEED＇s switch characteristics. Linear approximation and N-segment approximation are utilized to obtain S-SEED＇s voltage-time （V-T） and characteristics. Theoretical analysis is verified by simulations, and the results demonstrate that the precision of S-SEED＇s switch time can satisfy the requirement in applications with linear approximation. Moreover, the simulations compare S-SEED＇s switch characteristics with different input powers and input contrast ratios, which reveal that increasing input contrast ratio is an effective way to improve S-SEED＇s switch characteristics.     

多孔硅发光二极管的载流子传输特性研究

制备AI／多孔硅／c-Si／Al结构的多孔硅发光二极管，利用其I-V特性关系，以及在不同温度下其I-V特性的变化，结合多孔硅的特殊微结构及性质，分析了多孔硅发光二极管中载流子的产生和传输过程；通过比较其发光猝灭前后I-V特性的变化，解释了发光猝灭的原因。提出了如果在低电场下能够实现大量载流子在限制性Si微粒中复合．是提高多孔硅电致发光效率的一个途径。