CNOOC,Shell Engaged in Cooperation in Exploration of Bohai Bay Area

CNOOC announced singing of a production sharing contract with Shell Exploration China Limited in mid-January this year for exploration of Bonan block in Bohai Bay basin area.Under the contract, Shell will act as operator to drill two wildcat well at least in the first two years, with options for two further wildcat wells in the following four years. The contract also confirmed the rights of Shell for participation in development activities with CNOOC if commercial oil and gas was found …     

皮革去污上光用乳化蜡的研制

采用石蜡、微晶蜡为主要原料 ,经实验选出了以水为稀释剂的乳化型皮革去污上光蜡。实验优化的配方为石蜡 12 .5 g ,微晶蜡 8.0 g ,硬脂酸 8.5g ,三乙醇胺 5 .5 g ,水量 70 (涂用 )或 130 g(喷用 )。反应条件为乳化时间 4 0min ,搅拌速度 5 0 0～ 70 0r/min ,乳化温度 90℃。制得上光剂产品的去污性能可与用去污剂单独处理的效果相当 ,亮度可达 6 6 .7。     

通过直接栅电流测量研究PMOSFET's热载流子损伤

通过直接栅电流测量方法研究了热载流子退化和高栅压退火过程中PMOSFET's热载流子损伤的生长规律.由此,给出了热载流子引起PMOSFET's器件参数退化的准确物理解释.并证明了直接栅电流测量是一种很好的研究器件损伤生长和器件参数退化的实验方法.     

理论——实习一体化教学探索

理论－实习一体化教学方式，即采用专业理论教学与实习教学同步进行，专业理论教学与实习教学有机结合的教学形式，有利于学生对专业知识的掌握和形成，有效克服理论知识与实际操作的“两张皮”现象，是适合技工教育的一种有效教学形式。     

硝酸铵的膨化机理研究

膨化硝酸铵是一种自敏化改性硝酸铵,由硝酸铵溶液在专用表面活性剂作用下,经真空强制析晶工艺制得.文中研究了膨化硝酸铵制备的膨化过程和专用表面活性剂的作用,结果表明:在真空和表面活性剂作用下,硝酸铵溶液由不饱和状态至饱和状态,进而达到过饱和状态,最终导致硝酸铵的快速结晶和体系的膨胀.在真空干燥过程中,形成中心空穴、微细孔道和裂缝,它们使膨化硝酸铵的起爆感度提高;专用表面活性剂具有降低硝酸铵溶液表面张力、发泡剂和加快结晶成核的作用.     

金刚石薄膜制备和评价

采用平直钨丝作热解源,并借助钨丝支架的弹性恢复力,较好地解决了热丝热解化学气相沉积法(HFCVD)合成金刚石过程中热解丝的变形问题.样品独立加热,基片温度、钨丝温度、钨丝与样品基片距离均可独立调节.装置改进后,在Si(100)上合成了面积大约45mm×25mm的比较均匀的金刚石膜.用扫描电子显微镜(SEM)、Raman光谱和X射线衍射仪对制备的金刚石膜进行了分析.     

聚丙烯共混表面改性剂的研究

由不同链长的甲基丙烯酸长链醇酯。少量改性剂与聚丙烯共混，能大幅增加聚丙烯表面润湿性与粘接性，而拉伸强度与熔点却变化不大。通过ＥＳＣＡ与接触角分析，发现极性基团大表面富集，添加不同改性剂使材料表面富集的极性基浓度与粘接强度产生差异。     

Study on the propagation of inlet flow distortion in axial compressor using an integral method

 An integral method is investigated and developed in the current work. The effects of the parameters of inlet distortions on the trend of downstream flow feature in compressor are simulated. Other than the drag-to-lift ratio of the blade and the inlet incidence angle, it is found that the distorted inlet velocity is another essential parameter to control the distortion in propagation. Based on this study, a novel critical distortion line and corresponding critical distortion factor are proposed to express the effect of the two essential inlet parameters on the propagation of distortion, namely, the inlet incidence angle and the distorted inlet velocity. From the viewpoint of compressor efficiency, the propagation of inlet flow distortion is further described by a compressor critical performance and its critical characteristic. The results present a useful physical insight to an axial flow compressor behavior and asymptotic behavior of the propagation of inlet distortion, and confirm the active role of compressor in determining the velocity distribution when compressor responds to an inlet flow distortion. Received: 20 December 2001 / Accepted: 21 August 2002 The authors would like to thank HQ RSAF for permission to publish this work, their financial support and encouragement. The first author wants to acknowledge Prof. Frank Marble of California Institute of Technology, for bringing the problem to the author's attention and for his helpful discussion.     

某炮弹复合参数测试装置的研究

本文概述了某炮弹的复合参数测试装置的特点和研究结果,对炮弹的复合参数的测试方法、实用性及可行性进行了探讨.炮弹参数主要关心的是其过载、冲击及转速.该装置集多种技术于一体,它具有体积小、高可靠性、使用方便等特点.它为炮弹的研制及改进提供了重要的参数.     

风机盘管在空调工程中的应用及分析

根据风机盘管的特性，分析了设备运行状况和能量调节方法等方面的有关问题，指出了风机盘管采用变风量的方法调节能量所存在的弊端，同时还分析了在空调设计中，如何充分运用这些特点来合理选型，并对产品开发方面提出了建议。