基于光阻法的药液中异物信号分析及光路优化

对基于光阻法的药液中异物微粒检测的光电信号特征进行了分析,并分析和计算了颗粒大小、探测器有效光敏面积、光波长、光束宽度等对异物微粒产生的特征脉冲信号的影响.根据理论分析和计算结果,通过改进和优化光路设计,创新采用阵列透镜和阵列探测器方案,经过光学软件模拟和实验验证,有效增大了异物微粒的特征脉冲信号,从而提高了对异物微粒的检出率.     

自动穿筘光电精确定位系统的研制

介绍光电精确定位筘齿的方法及装置的研制。采用对射式光电检测原理．由红外发光二极管与光电三极管组成红外线传感器．将光信号转换为电信号．经过整形电路后输入至单片机．由单片机控制步进电机移动光电检测装置并判断是否有误,如无错误则可输出穿筘信号给穿筘装置进行穿筘;如出错则产生提示并停机。利用红外线实现无接触定位筘齿,控制精度高．可实现智能化穿筘。     

色谱指纹图谱在区分3种引种松果菊中的应用

用高效液相色谱-二极管阵列检测(HPLC-DAD)技术,建立了同时满足不同品种松果菊指纹图谱测定要求的色谱条件,以及紫花松果菊花的色谱指纹图谱模型.用DAD最大值化技术和蒸发光散射检测器(ELSD)评估检测结果并验证指纹图谱的信息量.用采集的色谱-光谱信息和对照品推断及确定特征成分.紫花松果菊花模板的色谱峰个数达到总个数的88%,信息量达到总量的63%.该研究提出评估指纹图谱模板质量的思路,并为区分易混淆的植物药材提供了一种新的合理、可靠的方法模式.     

基于舍弃采样的光线投射加速算法

光线投射法是一种重要的体绘制算法,但直线上采样点的确定和采样值计算是非常费时的,也是影响体绘制实时性的重要因素.针对这个问题,该文利用对象空间的相关性,采用舍弃贡献不大的射线段参与采样的方法,加快了绘制速度.同时利用平面簇的交点可以快速求得直线上的采样点及其特征值,结合自适应采样方法,提高了绘制图像的质量.改进以后的算法复杂度明显降低,实验结果证明绘制速度可以提高20%左右.     

气相色谱仪检测器的清洗维护

介绍了气相色谱仪检测器在日常使用中的维护,根据使用经验对各种常见检测器各部件维护的要求进行了阐述。根据检测器的原理、工作条件及影响因素,总结了对检测器的检查和排除故障方法,并按此经验方法去定期维护,提高了检测器的灵敏度,确保实验结果的准确性。     

整体平行束X光透镜及其在X射线衍射技术中的应用

使用整体平行束Ｘ光透镜和准直管在Ｓｉ（１１１）晶体上进行Ｃｕ－Ｋα辐射的衍射实验,实验结果表明：在相同Ｘ光源功率条件下,使用整体平行束Ｘ光透镜比使用准直管测量的衍射峰强度提高了近４倍。     

射线跟踪法用于反射器散射场计算及算法改进

目的 研究三面角反射器后向散射场问题,并对射线跟踪法的典型算法进行改进,以提高运算速度。方法 利用射线跟踪法对电大尺寸的三面角反射器的后向散射场进行分析,并利用斯托克斯定理将射线跟踪中的面积分简化为代数多项式。结果 对提高的算法进行了实例计算,计算结果与以往的试验结果基本吻合。结论 将射线跟踪法应用于三面角反射器的后向散射场的研究中;改进的算法不但计算准确而且运算速度也有所提高。     

微型制冷机设计特点及联试结果分析

文章介绍了一种０．５Ｗ／８０Ｋ微型双活塞对置式斯特林循环制冷机的设计特点,并对设计思路及联试结果进行了分析。目前,该制冷机与红外探测器组件联试已取得成功,被冷却红外器件工作时温度低于７７Ｋ,室温成像效果清晰,已用于多元红外系统中。     

Coronal structure and brightness profile of the total solar eclipse on August 1, 2008

Solar corona is the outermost part of the solar atmosphere. Coronal activities influence space environment between the Sun and the Earth, space weather and the Earth itself. The total solar eclipse （TSE） is the best opportunity to observe the solar corona on ground. During the TSE 2008, a series of images of the corona and partial eclipse of solar disk were obtained using telescope and CCD camera. After image processing, preliminary results of coronal structure are given, and radial brightness profiles of the corona in directions of pole and equator of the Sun are measured. Though in solar activity minimum, the shape and structure of the corona are not symmetry. The equatorial regions are more extent than the polar one, and there are also larger differences between the east and west equatorial regions and between the south and north polar regions. Coronal streamers on east side of the equator, particularly the largest one in east-south direction, are very obvious. The coronal plume in south polar region consists of more polar rays than that in north polar region. These structures are also shown in other observations and data of SOHO. The radial brightness profiles in directions of pole and equator are similar to those of the Van de Hulst model in solar minimum, but there are a few differences due to coronal activity, which is shown in the isophote map of the corona.     

The antiproton annihilation detector system of the ATRAP experiment

The ATRAP (antihydrogen trap collaboration) at CERN (European organization for nuclear research) has developed a completely new, larger and more robust apparatus in the second experimental zone. The antiproton annihilation detector system consists of 10 layers of scintillating fibers, counts the antihydrogen atoms and determines the annihilation vertex of the atoms. This diagnostic element will allow to optimize the production of cold antihydrogen sufficiently to permit the optical observations and measurements. Using this new apparatus thousands of antihydrogen atoms have been produced within a combined Penning-Ioffe trap. These observed antihydrogen atoms resolve a debate about whether positrons and antiprotons can be brought together to form antihydrogen atoms within the divergent magnetic fields of a quadrupole Ioffe trap. Supported by the NSF (Grant No. 0306308) and AFOSR of the US, the BMBF, MPG and FZ-Juelich of Germany, and the NSERC, CRC, CFI (Grant No. 3756) and OIT of Canada