水溶胶聚合物矿场配注技术

为适应马岭高含盐油藏聚合物驱油需要，建立了以１０％水解度和３０％浓度的水溶胶聚丙烯酰胺为配液原料的聚合物配注站，部分克服了国产干粉聚合物分子量偏低的缺点。流体流变学计算结果和矿场配注实践表明，本配注站流程设计合理，所配聚合物溶液的主要技术指标符合聚合物驱替地质方案要求。在新岭２６６单井试注中，已累计配注６００～１０００ｍｇ／Ｌ聚合物驱油剂溶液１８３０８ｍ３，注入压力由９ＭＰａ上升到１４．５ＭＰａ，井组综合含水率上升趋势已得到控制，日产油量开始回升，已初步显示出聚合物驱油效果     

New Methods for the Preparation of Multiply Substituted Cyclopentadienes and Related Compounds

Substituents on cyclopentadienyl ligands significantly influence the reactivity and catalytic efficiency of their transition metal complexes. Therefore, development of synthetic methods for cyclopentadiene derivatives possessing different substituents has been in great demand. In this paper, we report new synthetic methods for multiply substituted cyclopentadienes recently developed in this group. In principle, three types of preparative methods are described. Firstly, zirconacyclopentadienes in the presence of Lewis acids react with aldehydes to afford multiply substituted cyclopentadienes, thus providing a one-pot procedure from two molecules of identical or different alkynes and one molecule of aldehyde; reaction of aluminacyclopentadienes with aldehydes also result in high-yield formation of multiply substituted cyclopentadienes. Secondly, 1,2,3,4-tetrasubstituted 1,4-dilithio- and 1,4-bis(magnesiobromo)-1,3-diene derivatives react with aldehydes or ketones via deoxygenation of the C=O moieties to afford cyclopentadiene derivatives. Thirdly, monolithio reagents, 1,2,3,4-tetrasubstituted 1-lithio-1,3-butadienes, and Grignard reagents, 1,2,3,4-tetrasubstituted 1-magnesiobromo-1,3-butadienes react with aldehydes or ketones to afford cyclopentadiene derivatives upon hydrolysis.     

复杂结构中裂纹声发射源定位方法的适应性分析

声发射技术是一种动态的无损检测技术，在分析声发射源定位方法研究现状的基础上，结合混流式水轮机转轮提出了复杂结构中裂纹声发射源的3种定位方法，即三维时差定位、区域定位、自适应智能定位法，并给出了声发射源定位系统程序的实现方法。在此基础上，对各种定位方法做了适应性分析与比较，为进行混流式水轮机裂纹定位及发展趋势的预估提供了依据。     

PMBP－萃淋树脂萃取色谱光度法测定磷肥中稀土总量

提出了用ＰＭＢＰ－萃淋树脂柱色谱萃取、甲酸洗脱分离稀土，在ＫＣｌ介质中用偶氮胂Ⅲ显色剂光度法测定磷肥中稀土总量的方法。对三种磷肥试样测定的统计结果表明，本方法标准偏差（ＳＤ）小于１．６％、相对标准偏差（ＲＳＤ）小于７％。与ＰＭＢＰ－苯溶剂萃取光度法测定结果相比，相对误差小于３％。本法用于磷肥中稀土总量测定，具有结果可靠、无环境污染、易于推广的优点。     

Effects of Alloying Elements on Microstructure and Erosion Resistance of Fe—C—Cr Weld Surfacing Layer

Effects of alloying elements on microstructure and erosion resistance of Fe-C-Cr weld surfacing layer have been studied. The experimental results show that increasing C and Cr content favors improving the erosion resistance of the layer, and the excessive C and Cr result in decreasing the erosion resistance at 90 deg. erosion. That Mo, Nb or Ti improves the erosion resistance of Fe-C-Cr weld surfacing layer is mainly attributed to increasing the amount of M7C3 and forming fine NbC or TiC in austenite matrix, but the excessive Mo, Nb or Ti is unfavorable. The addition of Mo, Nb and Ti in proper combination possesses stronger effect on improving the erosion resistance and the erosion resistance (εA) of Fe-C-Cr weld surfacing layer with fine NbC, TiC and M7C3 distributing uniformly in austenite matrix obviously increases to 2.81 at 15 deg. erosion and 2.88 at 90 deg. erosion when the layer composition is 3.05C, 20.58Cr, 1.88Mo, 2.00Nb and 1.05Ti (in wt pct).     

单体模糊神经网络自学习问题研究

本文采用的单体模糊神经网络在智能控制中兼有模糊控制与人工神经网络控制的特点，不仅具有良好的控制特性，而且能够进行模型自学习和在线自调整。结合本身结构，人工神经网络理论和模糊理论，可得到ＭＦＮＮｓ自学习的一系列算法。     

A Numerical Study on Tuned Substrate Self-Bias in a Radio-Frequency Inductively Coupled Plasma

The tuned substrate self-bias in a radio-frequency inductively coupled plasma is controlled by varying the impedance of an external tuning LCR （inductor, capacitor and resistor） network inserted between the substrate and the ground. In experiments, it was found that the variation of the tuned substrate self-bias with the tuning capacitance demonstrated three features, namely, continuity, instability and bistability. In this paper, a numerical study is focused on the elucidation of the physical mechanisms underlying continuity and bistability. For the sake of simplicity and feasibility to include the key factors influencing the tuned substrate bias, the tedious calculation of inductive-coupling to obtain the plasma density axtd electron temperature is omitted, and discussion of the tuned substrate self-bias is made under the prescribed plasma density and electron temperature. On the other hand, the parameters influencing capacitive- coupling are retained in modeling the system with an equivalent circuit. It is found that multi-stable state appears when one of the parameters, such as the resistance in LCR, substrate area and plasma density, decreased to its critical value, or the rf voltage or electron temperature increased to the critical value individually. In the reverse cases, the tuned substrate self-bias varies continuously with the tuning capacitance.     

两步法油田油井结垢处理技术及其发展

本文简要介绍了油田油井结垢的成因、化学清洗及防治的机理、两步法施工工艺方法、施工效果分析.证明了清防结合的两步法施工工艺、在增产和稳产方面有一定的优势.     

有Al激光器和无Al激光器的工作寿命对比研究

为了证明无Al激光器在可靠性方面优于有Al激光器,对InGaAsP/GaAs无Al和AlGaInAs/AlGaAs/GaAs有Al的808nm大功率半导体激光器进行了常温下电流步进加速老化寿命试验,介绍了半导体激光器寿命试验的理论依据,给出寿命试验的数学模型,据此得到了器件在常温电流步进条件下的寿命,利用最小二乘法拟和得到加速老化的加速方程,从而推算出激光器的特征寿命,分析了有Al激光器和无Al激光器寿命对比结果,提出了材料中含Al对器件可靠性的一些不良影响,无Al激光器可靠性明显优于有Al激光器.     

浅谈建筑施工项目安全管理与控制技术

施工安全管理工作是施工项目管理中的重要组成部分,文中以施工安全管理工作的基本内容及特点等为基础,较详细地从施工安全技术措施及组织保证体系等方面强调如何做好施工安全管理工作。