一次性注射器微粒污染检测方法初探

目的:目前国内外对注射器微粒含量均无检验标准及方法。本文以输液器的标准与方法为参考,对注射器微粒含量检测方法进行实验研究,探索相对科学的检测方法。方法:采用粒子计数法,分别测量空白对照液和洗脱液的微粒含量。结果:两组间<100μm粒径的微粒含量有显著差异。结论:粒子计数法可作为一次性注射器微粒含量的实验方法。     

多通道微粒分析系统设计

本文给出一种基于状态分析的微粒检测方法,该方法简单可靠、检测精度高,适用于Coulter法或光阻法测量流体中微粒个数及体积分布,易在可编程器件中实现。在Cyclone Ⅱ EP2C5 FPGA中构建五通道微粒分析系统,经测试具有良好的检测效果。     

基于计算机视觉的微观稀疏离散粒子尺寸的检测

针对场流分离后,微粒处理时存在尺寸不直观等问题,提出了基于图像处理技术检测微粒尺寸的方法。首先用CCD并配合图像处理软件采集微粒图像并进行预处理,然后用阈值化方法分割图像。在测量尺寸时,以小麦粉作为被测量样本,利用动态聚类处理,得出微粒16个、最大半径1.600 μm、最小半径1.000 μm、平均半径1.187 5 μm、半径方差0.661 4等。试验表明,本文提出的检测微粒尺寸参数的方法方便可行。     

多通道微粒分析系统设计

本文给出一种基于状态分析的微粒检测方法,该方法简单可靠、检测精度高,适用于Coulter法或光阻法测量流体中微粒个数及体积分布,易在可编程器件中实现。在Cyclone Ⅱ EP2C5 FPGA中构建五通道微粒分析系统,经测试具有良好的检测效果。     

车用柴油机排气微粒捕捉器测试仪的研究

为了满足车用柴油机排气捕捉器安全使用的需要,本文提出了一种捕捉器微粒沉积量实时检测技术,介绍了微粒测试仪的组成及工作原理,并对测试结果具有一定影响的一些因素进行了分析。研究结果表明,在检测范围内,测试结果基本不受柴油机工况的影响。这一检测技术可以对车用柴油机排气微粒捕捉器微粒沉积量进行实时连续检测,具有一定的应用价值。     

中科院自动化所实现大口径光学元件表面微粒在线检测

正近日,中国科学院自动化研究所精密感知与控制中心研究员徐德、张正涛在IJAC第4期发表了研究论文An Effective On-line Surface Particles Inspection Instrument for Large Aperture Optical Element。文章介绍了最新设计的一款新型紧凑检测仪,可用于快速检测LAOE表面的微粒污染,该仪器携带方便,实现在线检测。当前,对于光学元件表面微粒的检测最基本的方法是肉眼观察,这全凭工人的经验来判断微粒数量和大小,最后的结果往往受很多主观因素影响。     

AccuSizer 780A光学粒径检测仪在冰川微粒研究中的应用

冰芯微粒的研究对反映大气粉尘变化具有重要意义。根据雪冰样品的特点，为寻求一种更便捷更适合的微粒检测方法，选择AccuSizer 780A光学粒径检测仪并尝试将其应用于冰川微粒的分析研究。通过对新疆天山1号冰川的大量雪冰样品微粒的检测分析，结果表明AccuSizer 780A光学粒径检测仪可满足冰川微粒研究的需要。     

固态微粒物理混合物多元多相复合模型及光波透射特性

基于光与物质相互作用理论,建立了固态微粒物理混合物的多元多相复合模型,重点分析了混合物的光波透射特性,其研究结果为固态微粒物理混合物的组成成份检测方法研究和仪器开发提供了理论指导和设计依据.     

数字全息技术测量大气微粒场的研究

记录光路采用Mach-Zender干涉法,CCD作为记录介质,以数字的形式记录了微粒场的离轴菲涅耳数字全息图,利用Fresnel-Kirchhoff衍射积分数字再现出了微粒场的复振幅分布。通过对尺寸39μm大小标准粒子场的记录再现,分析确定了准确检测出标准再现粒子数量的灰阶阈值范围和面积阈值范围。以检测出标准粒子的阈值范围为基准,在相同测量条件下,对采样大气微粒场进行再现检测,准确检测出了不同再现截面上尺寸大小接近39μm及大于39μm的聚焦粒子的数量,并采用多截面再现平均测量法估算测量了采样大气微粒场中微粒的数量及浓度。     

基于光阻法原理的智能微粒检测仪

介绍了光阻法原理检测注射液中的不溶性微粒，设计了光机电一体的智能微粒检测仪，它包括光阻法传感器、取样系统和电子测控系统。通过和美国HIAC粒子计数器比对，测试结果相互吻合。目前该仪器已经应用于注射液中的微粒检测。     

医用内窥镜系统体内驱动方式的研究

提出了一种新型的医用内窥镜系统的体内驱动方式和相应的驱动机构。此方式利用螺旋旋转时产生的牵引力推动医用内窥镜系统在人体内腔中运行，同时利用螺旋旋转时产生的动压效应建立起动压润滑粘液膜，使医用内窥镜系统在体内运行时不与内腔壁发生直接接触。避免对人体有机组织产生损伤。详细分析计算了用此方法驱动的医用内窥镜系统在不同半径、不同粘度粘液和不同弹性模量的内腔中的轴向运行速度和形成的粘液膜厚度，结果表明，用此方法驱动的医用内窥镜系统在人体内腔中运行时可以形成足够厚的粘液膜把医用内窥镜系统与内腔壁隔开，实现以较快速度的悬浮运行。上述分析结果已被实验研究所证实。     

强化土地整理项目财务管理提高财政资金使用效益

在土地开发整理项目管理中,四川省苍溪县财政局充分发挥财政投资管理职能,狠抓土地开发整理项目资金及财务管理,提高了土地开发整理项目资金的最大效益,保证了土地开发整理项目健康、有序地运行.     

从民营企业的现状谈民营企业的发展

我国的民营企业发展到今天这个地步,已是经过市场大浪的淘洗,存者能够经历风吹浪打,败者已随潮流而退,民营科技型企业则是一支生力军,成为推动科技进步和促进社会主义市场经济发展的一支重要力量。分析了民营企业的现状、企业家的现状、企业管理、企业文化等,为新介入衡器行业的民营企业的发展提供了一个参考的模式,以促进其整体素质的提升。     

试论作为“超级市场”的大学管理

隐喻是对现实的观念表达，在大学成为“超级市场”后，大学管理面临着一些新挑战。随着大学管理观念的转变，政府要加强对大学的管理权力，大学管理要民主化和科学化，建立咨询和协调机构，服务教育顾客。     

出口加强杆结构与布置方式对风机性能影响的试验研究

为保证风机出口蜗板面的平整,往往在风机出口采用加强杆进行固定。改变出口加强杆的高度与位置对风机性能会产生一定的影响。本文通过试验的方法对加强杆的高度与风机实际出口高度之间的最佳比值范围区间展开分析,给出了改善性能的合理匹配区间。     

重油催化主风机组汽轮机振动原因分析及解决措施

某炼油厂检修中发现重油催化裂化装置主风机组中汽轮机轴瓦异常振动,从轴承的承载能力及流 体动力学方面予以分析,故障诊断为转子油膜失稳造成的油膜涡动和机组对中不良所引起的.最后通过提高轴瓦的承载能力,堵塞轴瓦上多余小孔,消除机组对中误差等措施,成功解决了汽轮机轴瓦异常振动故障,确保了机组平稳运行.     

冷却塔风筒内流速场分布的研究

在分析冷却塔构成的基础上，建立了描述冷却冷却塔风筒内流场分布的数学模型，进而利用MATLAB语言求出了偏微分方程组的数值解，绘出了风筒内的流场。经研究发现，在风筒的中心处，存在一个空气倒吸的区域。最后，提出了消除空气倒吸现象的措施。     

Mapping of the morphological and the material characteristics on the glenoid and estimation of predominant loading condition on the glenoid through the mapping

The aim of this study was to predict and map the regional distribution of the trabecular architecture and the material properties of the glenoid and to estimate the predominant loading condition on the glenoid through the mapping. The morphological and material characteristics of the glenoid were investigated by analyzing digitized trabecular bone images obtained from twelve cadaver scapula specimens. The morphological and material characteristics computed from the cadaver specimens show that the predominant loading on the glenoid generally occurs during shoulder movement, which produces forces directed toward the posterior aspect of the bare region. This study is innovative in its detailed mapping of the morphological and material characteristics of the glenoid and its pioneering approach used to estimate the loading pattern acting on the glenoid through the mapping. This paper was recommended for publication in revised form by Associate Editor Young Eun Kim Dohyung Lim received B.S. and M.S. degrees in Biomedical Engineering from Inje University, Kimhae, Korea, in 1998 and 2000, respectively. He then went on to receive his Ph.D. degree from School of Biomedical Engineering, Science, & Health Systems, Drexel University, Philadelphia, PA, USA, in 2004. Dr. Lim completed a postdoctoral fellowship in Department of Physical Therapy and Human Movement Science, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA and a Research Professor of Biomedical Engineering, Yonsei University, Wonju, Gangwon, Korea. Dr. Lim is currently a Senior Researcher at the Korea Institute of Industrial Technology in Cheonan, Chungnam, Korea. Han-Sung Kim received B.S. and M.S. degrees in Machine Design and Production Engineering from Hanyang University, Seoul, Korea, in 1989 and 1991, respectively. Dr. Kim received Ph.D. degree in Mechanical Engineering from University of Manchester Institute of Science and Technology, Manchester, UK, in 1999. Dr. Kim is currently an Associated Professor at the Biomedical Engineering at Yonsei University in Wonju, Korea. Jung-Sung Kim received B.S. and M.S. degrees in Biomedical Engineering from Inje University, Kimhae, Korea, in 1996 and 1998, respectively. He is currently in the doctor’s course in Department of Medical Engineering and BK 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea. Rami Seliktar has a BS and MS degree in Mechanical Engineering, from The Technion, IIT, and Ph.D. (BME) from Strathclyde University, Scotland. He has held academic appointments in several institutions worldwide: Strathclyde University (2yrs.); associate professor at the Technion (9yrs.); Texas A&M (on sabbatical leave from the Technion), and twenty seven years as professor of BME and ME at Drexel University in Philadelphia. Concurrently he founded and directed a Biomechanics laboratory at the Loewenstein Rehab. in Israel and consulted to governments, public agencies and industries. Prof. Seliktar has done research on limb prosthetics, human performance, orthopedic and occupational biomechanics, assistive technology for automomobil dynamics. His research has been funded by: The NSF, NIH, the RWJ Foundation, the Easter Seal Foundation, NIDRR, AIduPont, the United Cerebral Palsy and some hospitals. He has published numerous articles in scientific journals, book chapters and conference proceedings. At the present, Rami Seliktar is Professor and Vice Director of the School of Biomedical Engineering, Science and Health Systems of Drexel University. Sung-Jae Lee received B.S. and M.Eng. degrees in Mechanical Engineering from Cornell University, Ithaca, NY, USA, in 1984 and 1985, respectively. He re-ceived Ph.D. degree in Biomedical Engineering from University of Iowa, Iowa City, IA, USA, in 1993 Dr. Lee is currently a Professor at Department of Biomedical Engineering, Inje University, Gimhae, Gyongnam, Korea. He is currently serving as a board member for the Division for Health Care Technology Assessment of International Federation of Medical and Biological Engineering (IFMBE), a executive member of Korean Orthopedic Research Society, director of international relations for the Korean Society for Biomaterials and also for the Korean Society of Biomechanics.     

Unravelling the structure of the lamellipodium

Summary Pushing at the cell front is the business of lamellipodia and understanding how lamellipodia function requires knowledge of their structural organization. Analysis of extracted, critical-point-dried cells by electron microscopy has led to a current dogma that the lamellipodium pushes as a branched array of actin filaments, with a branching angle of 70 degrees , defined by the Arp2/3 complex. Comparison of different preparative methods indicates that the critical-point-drying-replica technique introduces distortions into actin networks, such that crossing filaments may appear branched. After negative staining and from preliminary studies by cryo-electron tomography, no clear evidence could be found for actin filament branching in lamellipodia. From recent observations of a sub-class of actin speckles in lamellipodia that exhibit a dynamic behaviour similar to speckles in the lamella region behind, it has been proposed that the lamellipodium surfs on top of the lamella. Negative stain electron microscopy and cryo-electron microscopy of fixed cells, which reveal the entire complement of filaments in lamellipodia show, however, that there is no separate, second array of filaments beneath the lamellipodium network. From present data, we conclude that the lamellipodium is a distinct protrusive entity composed of a network of primarily unbranched actin filaments. Cryo-electron tomography of snap-frozen intact cells will be required to finally clarify the three-dimensional arrangement of actin filaments in lamellipodia in vivo.     

利用图书馆资源搭建高校素质教育平台

知识经济时代的到来,凸显了教育过程中培养全面发展的高素质人才的重要性,加强大学生素质教育,成为高校人才培养的重要目标.高校图书馆作为信息积累和交流的平台,在素质教育过程中发挥着重要作用.论述了高校图书馆在素质教育中的作用,并提出了利用图书馆丰富资源,搭建高校素质教育平台的几点建议.