多排队多服务台的服务系统病床安排优化研究

采用运筹学排队论原理对某眼科医院门诊病人的排队系统进行研究,本文提出各种眼科疾病病床设置的最佳值,并与医院现在的住院安排做对比,为医院的管理提供改进建议和科学的理论依据。该方法可以应用于其他疾病的病床安排。将该论理论应用于医院的病床安排是科学、有效的方法。     

Linear actuation in coextruded dielectric elastomer tubes

Cylindrical fibre actuators have been constructed by a coextrusion method using a thermoplastic polyurethane wall and a conductive grease filler. These actuators may be operated as single fibres or bundled together as actuating ropes. Key results include the validation of Carpi’s wall pressure model [F. Carpi, D.D. Rossi, Dielectric elastomer cylindrical actuators: electromechanical modelling and experimental evaluation, Mater. Sci. Eng. C-Biomimetic Supramol. Syst. 24 (2004) 555–562] and the proof-of-concept demonstration of a technique that can be used for producing inexpensive dielectric elastomer actuators on an industrial scale.     

Simultaneous measurement of temperature and strain with long period grating pairs using low resolution detection

An investigation showing the performance of compact long period grating (LPG) pairs under demanding experimental conditions, making comparisons with the use of single LPGs for the simultaneous measurement of strain and temperature is presented. In this work, a LPG pair (LPGP) sensor comprising two weak (2.5 dB each) LPGs, 13 mm apart, was compared against the performance of two single LPG sensors (LPG1 & LPG2) with coupling strengths of 2.5 dB and 12.5 dB, respectively. All the LPG sensors used were subjected to extreme conditions arising from the fabrication, by choosing a high amplitude mask period with short physical length LPGs, and the high temperature annealing processes. In addition, a low resolution detection instrument was used to capture the spectra under study. Results have shown that the LPGP is 40 times better than the first single LPG used (LPG1) and three times better than the second LPG (LPG2). Using the error analysis methodology of Brady et al., the temperature and strain errors due to the uncertainty of the wavelength measurement for each of the LPG1, LPG2, and LPGP were compared with the typical performance of various fibre Bragg grating (FBG)-based sensor schemes under similar testing conditions. It was found that LPGPs offer the best performance especially when using low resolution detection instrumentation.     

实现电大系统的考场及监考全自动编排

尽可能地去利用计算机办公而减少手工劳动的理由不仅仅在于省力,最主要的是不会出错。该文主要讲述如何从利用全国电大使用的教务管理系统的数据资源,结合每个分校的实际情况,最终完美地实现考场和监考教师的全自动编排,不仅完全解放了考务管理人员的繁杂劳动,而且最大限度地方便了电大考生,使其可以快速地寻找到考场参加考试,填补了原中央电大教务管理系统中关于考务管理的空白。     

一种用于信令寻径高速光纤交换网的信令降频方法

针对高速光纤交换网络高质量的交换服务需求,提出了一种适用于信令寻径式高速光纤通道交换机的信令降频方法.该方法采用一套特殊的序列码对信令帧内容进行编码后传输,以达到信令帧信号频率成倍降低的目的,使交换机无需借助串并转换器对高频信令帧进行降频,就能够直接识别信令帧内容.试验结果显示,采用信令降频方法后,交换机的结构显著简化,可靠性得到很大提高,并且硬件成本大大降低.     

基于Fibre Chanel组播的远程数据备份体系结构

数据备份是容灾的基础.本文提出了一种基于FC组播服务的远程数据备份方法,对其工作原理和所涉及到的粗波分复用和流量控制等关键技术进行了研究,对基于FC组播的数据备份系统的性能和所属的容灾层次等内容进行了分析.     

计算机本科教育的实践教学模式研究

高校毕业生就业问题在金融危机下显得尤为突出,但问题本身由来已久,引发该问题的原因很多,笔者在本文中针对本科计算机教学模式与市场需求之间的矛盾进行分析,并提出几点建议,其中主要介绍NIIT模式对计算机本科实践教学改进的意义。     

一种安全的LEACH路由算法

在研究低功耗自适应集簇分层型路由协议的基础上,从路由安全的攻防角度入手,分析现有各种路由攻击手段的原理、特点及危害,提出一种基于身份认证的密钥协商安全防范密钥管理对策,同时利用秘密共享技术防范关键点攻击,为无线传感器网络安全路由的设计与实现提供一个可行的方案。     

基于Fibre Channel的存储局域网络设计与研究

提出了一种用Ｆｉｂｒｅ Ｃｈａｎｎｅｌ－Ａｒｂｉｔａｔｅ Ｌｏｏｐ构建存储局域网络的方案并对Ｆｉｂｒｅ Ｃｈａｎｎｅｌ的体系结构进行了研究,以适应当今计算机数据量和存储访问需求急剧增长的情况。     

光纤通道存储局域网(FC_SAN)管理系统的研究

从管理角度介绍了典型的光纤通道局域网（Ｆｉｂｒｅ Ｃｈａｎｎｅｌ Ｓｔｏｒａｇｅ Ａｒｅａ Ｎｅｔｗｏｒｋ,以下简称ＦＣ_ＳＡＮ）环境,并阐述了管理该环境所面临的问题。同时,提出了一种局域网（Ｓｔｏｒａｇｅ Ａｒｅａ Ｎｅｔｗｏｒｋ,以下简称ＳＡＮ）管理体系,该体系分为两层,分别提供面向对象的服务和与实体相关的服务。