基于Java框架的银医一卡通系统设计

介绍了一种基于信息共享的医院--银行一卡通的信息系统设计方案。该系统使用Web服务实现接口通信,通过自助服务器连接医院系统和银行系统实现医院与银行的信息共享。基于该系统,用户可以使用中国银行借记卡代替医院门诊卡就医,提供了良好的就医环境,提高了医疗效率。     

一种新的BOC(n,n)型信号的精确捕获算法

针对BOC(n,n)型信号自相关函数存在三个峰值导致伪码捕获模糊性的问题,提出了一种新的基于相关函数的精确无模糊的捕获算法。该算法将信号进行频域的多普勒补偿,通过本地增设QBOC(n,n)支路,利用BOC(n,n)信号自相关以及BOC(n,n)和QBOC(n,n)互相关,经移位±TC/4、取模、求和、平方运算而实现。理论与仿真分析表明,该算法在不改变自相关主峰宽度的情况下完全消除相关副峰的同时,显著提高了主峰峰值;比传统捕获算法的性能好4.5 dB左右,并且捕获精度良好、易于实现。     

基于BOC调制技术的相关检测算法

通过对BOC信号的机理研究,提出利用平方倍频检测法检测BOC调制信号的载波频率,利用相关性对解调出的BOC基带信号的亚载波频率和扩频码码速进行检测．对算法的有效性进行了仿真测试,结果表明算法能有效地实现对BOC信号的载波频率、亚载波频率和伪码码速的检测．     

伽利略E5段信号结构分析及仿真

本文介绍了伽利略卫星导航系统E5段的信号结构,新型调制方式BOC的基本原理和在E5中的应用,并对伽利略E5信号的结构作了分析和简化,验证了E5段的Alt BOC信号在接收端可以近似为一个QPSK信号,最后给出了对于Alt BOC信号的接收和捕获的Matlab仿真结果。     

Axial offset control of PWR nuclear reactor core using intelligent techniques

Improved load following capability is one of the main technical performances of advanced PWR (APWR). Controlling the nuclear reactor core during load following operation encounters some difficulties. These difficulties mainly arise from nuclear reactor core limitations in local power peaking, while the core is subject to large and sharp variation of local power density during transients. Axial offset (AO) is the parameter usually used to represent of core power peaking, in form of a practical parameter. This paper, proposes a new intelligent approach to AO control of PWR nuclear reactors core during load following operation. This method uses a neural network model of the core to predict the dynamic behavior of the core and a fuzzy critic based on the operator knowledge and experience for the purpose of decision-making during load following operations. Simulation results show that this method can use optimum control rod groups maneuver with variable overlapping and may improve the reactor load following capability.     

Computational fluid dynamic investigations of partial blockage detection by core-temperature monitoring system of a sodium cooled fast reactor

Thermal hydraulic studies have been carried out to understand temperature dilution suffered by core-temperature monitoring system of a sodium cooled fast reactor. The three-dimensional computational model is validated against experimental results of a water model. Jet mixing phenomenon as predicted by different turbulence models is compared and RNG k–? model is found to be better than other models. A comprehensive parametric study considering: (i) effects of construction/manufacturing tolerances on thermocouple positions with respect to subassembly positions, (ii) thermal/irradiation bowing of subassemblies, and (iii) changes in core power profile during reactor operation cycles has been carried out. The studies indicate the maximum possible dilution in fuel and blanket subassemblies to be 2.63 K and 46.84 K, respectively. Shifting of thermocouple positions radially outward by 20 mm with respect to subassembly centers leads to an overall improvement in accuracy of thermocouple readings. It is also seen that subassembly blockage that leads to 7% flow reduction in fuel subassembly and 12% flow reduction in blanket subassembly can be detected effectively by the core-temperature monitoring system.     

BOC(10,5)信号的调制与解调

讨论了卫星导航中BOC调制解调的原理和实现方法，并着重研究了接收机的码跟踪技术。首先阐述了BOC信号体制出现的国际背景及信号特点，并介绍了BOC（10，5）信号形式和频谱特性，然后简要介绍了信号调制的方法，最后重点讨论信号解调方法。针对BOC信号多峰结构的自相关特性，分别研究并比较了两种解调方案，最后综合两者特点提出了组合式解调恢复方法。     

伽利略系统BOC信号的特性及码跟踪方法研究

为了节省卫星频率资源并提高导航信号的可靠性,新一代的导航定位系统采用了一种更有效的调制方式-BOC调制,它具有与BPSK之间串扰小、抗衰落能力强等诸多优点.但由于BOC调制信号特性比较复杂,因此加大了接收处理的难度.本文主要从理论上介绍了BOC和Alt-BOC的调制方式和信号产生方法、调制后信号的频谱特性以及自相关函数特性,依此分析了BOC信号自相关结果的多峰值特性和由此特性造成的跟踪和锁定难度的增加,以及相应于其频谱特性栽的信号处理方法.并在此基础上提出了一种能提高码跟踪可靠性的基带信号相关处理方法,Matlab仿真结果表明此方法有较好的效果,能提高码跟踪的可靠性.     

GNSS中BOC信号DLL新型相关器算法性能分析

本文介绍了BOC信号的基本结构,仿真了GPS和Galileo信号中采用的两种BOC信号的自相关函数以及鉴别器曲线。根据它们鉴别器曲线多个过零点的问题,用2N相关器法进行了分析和仿真。     

半无数据调制信号体制设计

分布式系统的节点时间自同步通常采用双向单程伪距测量（dual one-way ranging,DOWR）的方法来实现。针对DOWR中存在双向多路径时延差异,基于双支路半无数据调制技术,提出采用BOC（binary offset carrier）调制克服多路径误差。半无数据调制是指同相支路不调制数据,主要完成信号的捕获及跟踪,数据的解调在调制数据的正交支路上完成。为提高同相支路信号的捕获跟踪精度,增强正交支路数据的传输可靠性和抗干扰能力,分别对PSK-R（1）、PSK-R（10）、BOC（1,1）和BOC（10,5）等信号调制样式进行了对比分析。仿真结果表明,采用BOC（10,5）调制有效地提高了信号的码跟踪精度,增强了信号的抗多径和抗干扰能力。