超稠油水平井产能影响因素分析

随着相关技术的不断发展和成熟,水平井已经成为高效开发油田的重要手段,尤其在超稠油油藏开发中,水平井日益被广泛应用并且发挥越来越重要的作用。然而,在对水平井生产效果统计分析时发现,部署条件相似的水平井在产能上存在着较大差异。结合大量现场生产数据,从油藏参数、注采参数、生产控制等方面进行深入细致的分析,其研究结果为提高水平井生产效果,进一步指导超稠油油田的高效开发提供了依据。     

IMPROVED MEDIUM FOR DETECTION OF KLEBSIELLA IN POWDERED MILK

The selectivities to pathogenic Klebsiella strains of different isolation media were compared by known standard strains. The modified MacConkey-inositol-carbenicillin (MCIC) medium (Named MCIAC, MacConkey-inositol-adonitol-carbenicillin) supplemented with adonitol gave no false-negative colonies, and exhibited higher selectivity. MCIC and Simmons citrate agar with inositol (SCAI) media gave two false-negative colonies, respectively. These three media all gave two false-positive colonies, respectively. Salmonella Shigella medium gave four false-negative colonies and five false-positive colonies. Violet red bile glucose agar medium gave the most false-positive colonies, although it gave no false-negative colonies. One hundred samples of powdered milk were examined by MCIAC, MCIC and SCAI plates. The typical positive colonies were further identified using Vitek GNI Auto Microbic system and API 20E system. The results showed that the specificity of the MCIAC medium was higher than MCIC and SCAI media.

PRACTICAL APPLICATIONS

MacConkey-inositol-carbenicillin (MCIC) is the most commonly used selective medium for the detection of Klebsiella . But some inositol-nonfermenting Klebsiella strains would be missed when selected by this medium. We improved the MCIC medium by supplementing with 1% adonitol. The new modified medium (MacConkey-inositol-adonitol-carbenicillin, MCIAC) had advantages over other selective Klebsiella media in having a higher selectivity and an incubation time of only 16–24 h. MCIAC could be routinely used for pathogenic Klebsiella selection of powdered milk and other food samples.     

基于误差通道在线辨识的柴油机双层隔振主动控制研究

采用一种新的基于误差通道在线辨识自适应主动控制策略,并将其应用于双层隔振主动控制系统.该方法无需在控制器输出端叠加外加噪声,仿真结果表明,这种方法具有很好的控制效果和很强的鲁棒性.     

衍架式起重机故障分析及防护措施

论述了衍架式起重机的特点，在对衍架式起重机进行事故分析的基础上，提出了一些具体的防护措施，以确保衍架式起重机的安全运转，对提高工作效率、降低生产成本、树立良好企业信誉具有非常重要的作用。     

基于VC＋＋与OpenGL的飞秒激光加工几何仿真系统的研究

针对飞秒激光加工的三维几何仿真问题,设计了一种基于OpenGL技术和MFC的仿真系统.根据大量试验总结出刀具扫描体之间变形的规律,并建立数学模型,模拟出其刀具扫描体轨迹.编程实现,充分考虑了面向对象的代码的封装性和独立性,最终实践证明该仿真系统具有一定的可行性和推广价值.     

虚拟产品开发在铁路产品研发中的应用

简要介绍了虚拟产品开发的定义、特点和研究内容,以中国南车集团"产品电子样机设计系统"为例,介绍了电子样机技术在铁路产品研发中的应用.     

核壳乳剂的潜影分布和Sabatier效应的研究

本文制备了两种单分散八面体模型孔剂,一种是含碘10mol％的碘均匀分布碘溴化银乳剂,另一种是内核含碘20mol％的碘溴化银,外壳为溴化银的核壳乳剂。并对它们分别进行表面硫加金和硫加金加铱敏化。用简单腐蚀技术研究上述乳剂的内部影像空间分布的结果表明:随着表面敏化程度的增加,表面敏度逐渐增大;随着腐蚀的深入,内部敏度逐渐减少。核壳乳剂的表面和内部敏度均大于碘均匀分布颗粒乳剂。核壳乳剂的内部影像在颗粒內部先逐渐减少,在一定深度以后又逐渐上升,内部影像分布出现“低谷”,且“低谷”程度与表面敏化程度有关。Sabatier效应研究的结果表明:产生较明显的Sabatier效应的乳剂颗粒既要有足够的表面敏度,也要有足够的内部敏度,且两者要匹配。同时提出了产生Sabatier效应的机理。