单分子水平罗丹明B吸附在银胶颗粒上的表面增强拉曼散射光谱研究(英文)

本文研究了单分子水平上银胶纳米体系中罗丹明B和罗丹明6G的拉曼光谱,研究结果显示单分子水平上罗丹明B的拉曼光谱作为探测试剂将可能提供更加丰富的分子信息。     

The scale-transformation of electromagnetic theory and its applications

The scale-transformation of electromagnetic theory is investigated in detail based on the form of Maxwell equations in scale-transformation being unchanged in different coordinate systems. The relations of electromagnetic parameters in a rectangular coordinate system and in a spherical coordinate system are presented respectively. The scale-transformation invariants for electromagnetic field are derived and their physical meaning is also presented. It is indicated by simulation that the electromagnetic waves located in medium can be considered to be isotropic due to the fact that the size of propagating vector affected by the scale factors and observing azimuth is on a size of 10^-9, which provides a new approach for investigating the electromagnetic characteristics of ellipsoidal targets.     

磁驱动滑动弧放电装置的磁路设计

大气压磁驱动滑动弧放电能产生具有约束性能较好的非平衡等离子体，在微电子工业，环境工程等领域有广泛的应用前景，利用磁导法对此装置进行了磁路设计，得出了磁感应强度，磁体厚度，气隙长度三者之间的解析表达式，所得出的结果与有限元分析结果进行了比较，偏差约为3.1%，但磁导法简捷方便，通用性强，经济性好，是一种更为可靠而实用的工程算法。     

体外冲击波粉碎肾结石

著者在设计并完成了水中聚焦冲击波高体粉碎肾结石后,又对聚焦冲击波对动物组织的影响进行了实验研究,结果表明对动物组织无损伤,于是进行了大动物实验,体外冲击波粉碎狗肾脏中的结石(人工植入)获得成功,在上述工作的基础上,取得了临床体外碎石六例的成功。在X光-电视交叉定位系统中,采用了IBM-PC微机进行图像处理。     

6H-SiC Schottky barrier source／drain NMOSFET with field-induced source／drain extension

A novel SiC Schottky barrier source/drain NMOSFET (SiC SBSD-NMOSFET) with field-induced source/drain (FISD) extension is proposed and demonstrated by numerical simulation for the first time. In the new device the FISD extension is induced by a metal field-plate lying on top of the passivation oxide, and the width of Schottky barrier is controlled by the metal field-plate. The new structure not only eliminates the effect of the sidewalls but also significantly improves the on-state current. Moreover, the performance of the present device exhibits very weak dependence on the widths of sidewalls.     

一维光子晶体中的电磁模密度

阐述了电磁模密度(EDOM)的概念及其在描述光辐射中的重要作用.推导了有限大小的均匀介质和一维光子晶体EDOM的解析表达式,计算出由λ₀/4薄片构成的一维光子晶体的EDOM,明显看出一维光子晶体中EDOM受光子带结构调制的现象;分析了在带边缘处EDOM有极大增强的现象,其值近似正比于周期数N的平方和两种介质折射率差的平方,并用数值计算结果证实了这一特点.     

Utilization of Electromagnetic Detector for Selection and Detection of High-Frequency Relic Gravitational Waves

It is shown that the coupling system between fractal membranes and a Gaussian beam passing through a static magnetic field has strong selection capability for the stochastic relic gravitational wave （GW） background. The relic GW components propagating along the positive direction of the symmetrical axis of the Gaussian beam might generate an optimal electromagnetic perturbation, while the perturbation produced by the relic GW components propagating along the negative and perpendicular directions to the symmetrical axis will be much less than the former, and the influence of the random fluctuation of the relic GWs to such effect can be neglected. The high-frequency relic GWs satisfying the parameters requirement （h - 10^-31 or larger）, frequency resonance and “direction coupling”, in principle, would be selectable and measurable in seconds.     

电磁理论大厦的缔造者——麦克斯韦

 在科学史上,一些重大的理论的创立,往往是一场接力跑。他要靠许多英才前赴后继、不辞劳苦的努力,才能达到成熟的境界。19世纪物理学爆发的电磁理论革命也是如此。从奥斯特、安培发现电流的磁效应开始,经过法拉第的奠基直到最后理论的完成前后共经历了半个多世纪,其中集这一理论之大成者,是英国杰出的数学物理学家詹姆斯·克拉克·麦克斯韦。1831年6月麦克斯韦出生于英国苏格兰古都爱丁堡,与电话发明家贝尔算是同乡。那一年,恰好法拉第发现电磁感应,是电学史上值得纪念的一年麦克斯韦的父亲约翰·克拉克·麦克斯韦原是律师但他的主要兴趣是在制作各种机械和研究科学问题。     

重力场下循环小通道热驱动现象数值研究

本文以数值模拟的方法,研究了由常海萍教授和过增元院士提出的一种新型冷却换热结构,即构造一个微小循环通道,一端加热,一端冷却。利用彻体力场下流体的热驱动来实现换热。计算中主要通过改变通道宽度,研究不同通道宽度下,循环小通道内水的流动和换热现象。数值结果表明,通道宽度对流动和换热的影响很大,在通道高度一定的条件下,存在着最佳通道宽度,此时换热效果最佳。本文研究内容在高密度封装电子器件的液体透体冷却等场合有较好的运用前景。