电大尺寸导体附近线天线的辐射方向图研究

采用一致性几何绕射理论分析了电大尺寸导体对其附近的对称振子天线辐射方向图的影响,计算了在三种不同环境下的天线方向图,结果与软件(FEKO)仿真结果吻合良好.为分析工程中复杂的电大尺寸目标,提供了重要的参考依据.     

Recent Progress in the Synthesis of Porous Carbon Materials

In this review, the progress made in the last ten years concerning the synthesis of porous carbon materials is summarized. Porous carbon materials with various pore sizes and pore structures have been synthesized using several different routes. Microporous activated carbons have been synthesized through the activation process. Ordered microporous carbon materials have been synthesized using zeolites as templates. Mesoporous carbons with a disordered pore structure have been synthesized using various methods, including catalytic activation using metal species, carbonization of polymer/polymer blends, carbonization of organic aerogels, and template synthesis using silica nanoparticles. Ordered mesoporous carbons with various pore structures have been synthesized using mesoporous silica materials such as MCM‐48, HMS, SBA‐15, MCF, and MSU‐X as templates. Ordered mesoporous carbons with graphitic pore walls have been synthesized using soft‐carbon sources that can be converted to highly ordered graphite at high temperature. Hierarchically ordered mesoporous carbon materials have been synthesized using various designed silica templates. Some of these mesoporous carbon materials have successfully been used as adsorbents for bulky pollutants, as electrodes for supercapacitors and fuel cells, and as hosts for enzyme immobilization. Ordered macroporous carbon materials have been synthesized using colloidal crystals as templates. One‐dimensional carbon nanostructured materials have been fabricated using anodic aluminum oxide (AAO) as a template.     

无线移动自组织网路由协议综述

本文首先简单介绍了Adhoc网的概貌，然后全面介绍了Adhoc网的路由协议。包括平面路由协议和分层路由协议，先验式和反应式路由协议以及GPs辅助型路由协议。     

多媒体CAI课件制作分析

本根据当前多媒体课件制作和使用情况，对多媒体课件在制作中存在的问题及原因进行了剖析，重点提出多煤体课件制作的五个原则、教学性原则、控制性原则、简约性原则、科学性原则。同时，也分析了课件制作的方法和制作误区。     

氟化电热蒸发ICP-AES中的基体干扰及机理研究

对氟化辅助电热蒸发电感耦合等离子体原子发射光谱(FETV-ICP-AES)中的基体效应及其机理进行了初步探讨。考察了基体元素Na、Ca、Zn对待测难熔元素Y的语线强度、蒸发过程和激发过程的影响。所得实验结果表明，与常规ICP-AES相比，在FETV-ICP-AES中的基体效应明显降低，其主要原因与试样的蒸发和激发(电离)分步进行，ETV-ICP体系具有更高的激发温度以及待测物和基体在蒸发过程中发生了选择挥发有关。     

离子束辅助沉积铌提高铀的抗腐蚀性能研究

利用离子注入技术在铀表面进行了离子束辅助沉积铌和离子注入铌形成表面改性层，并对改性层的厚度、注入元素的分布进行俄歇电子能谱（AES）分析和表面相及结构的X射线衍射谱（XRD）分析，用电化学极化法测试抗腐蚀性能。结果表明：离子束辅助沉积表面改性层比离子注入表面改性层明显增厚，铀的耐蚀性得到进一步改善。最后讨论了注铌改性层耐蚀性提高的原因。     

机器人技术在中医正骨手术中的应用研究

本文介绍了一套自行开发的机器人辅助正骨医疗手术平台系统．系统由计算机辅助 手术规划软件和正骨机器人两大部分组成，其中计算机辅助手术规划软件可以采集患者骨折 处的X光图像，机器人则在医生的控制下完成拉伸牵引、旋转、模拟手法复位等动作，使患 者骨折处闭合复位．本系统能够代替医生在X光辐射环境下进行正骨手术，避免射线对医生 身体的损伤，同时提高了手术效率、手术精度和安全性．系统已成功地应用于临床．     

虚拟现实技术及其在现代医学中的应用

虚拟现实是近年来发展起来的一项新的技术,它已经被广泛地应用于许多领域,特别是在医学领域．本文在简述虚拟现实技术的基础上,从虚拟人、辅助诊断和手术、虚拟手术模拟以及虚拟的远程医疗系统四个方面介绍了虚拟现实在医学上的应用．     

离子束辅助沉积立方氮化硼的试验研究

运用离子束辅助沉积(IBAD)法在硅片上制备了立方氮化硼(c—BN)薄膜，研究了辅助能量、辅助束流及辅助束中氮气含量等参数对膜中c—BN含量的影响。用红外光谱(FTIR)及X射线光电子能谱(XPS)分析技术对得到的c—BN膜进行了分析。结果表明：合适的离子辅助能量能够获得c—BN含量高的薄膜；膜中c—BN的含量随辅助气体中N2含量的提高而增加；辅助束流对薄膜的形成影响不明显。     

Expansion of Plasma of Electrically Exploding Single Copper Wire Under 4.5kA～9.5kA/Wire

Abstract The experimental system for electrically exploding single metal wire has been de-signed and manufactured. Expansion of the dense plasma column formed from an electricallyexploding Cu wire of diameter 30 μm has been studied with a high-speed photographer to obtainthe time-dependent radius (R-t) curve. The experimental results demonstrate that the mean ex-pansion rate of the dense plasma column is 1.94 μm/ns, 2.6 μm/ns and 3.75 μm/ns according tothe peak pulse current 4.5 kA, 7 kA and 9.5 kA respectively. The results can be beneficial to givinga profound understanding of the early stage of wire-array Z-pinch physics and to improvement ontheir design.