网络教学系统中课程内容管理功能的设计与实现

课程内容管理是各类网络教学系统的一项重要功能.结合实际系统的开发,介绍一个基于Web的课程内容管理功能的设计方案,并简述其实现方法,为相关的网络教学系统提供系统.     

网络化开放式的红外光谱虚拟实验室

采用Flash8.0及其ActionScript 2.0编程技术、模块化的设计思想、Flash8.0+PHP+MY SQL技术开发网络化开放式的红外光谱虚拟实验室.开放式设计思想便于虚拟实验室采用维护和更新.红外光谱虚拟实验室将红外光谱分析的理论学习、测试、谱图查询和实验模拟有机结合为一体.谱图解析模块可对光栅格式的红外谱图自动识别、重绘,提取谱图信息,并解析谱图.     

Construction technology on pile foundation of No. 6 main pier in Dashengguan Yangtze Bridge

Based on pile foundation construction of No. 6 main pier, deep mudstone geological foundation and deep-water construction in Nanjing-Dashengguan Yangtze Bridge, the method of super-large-diameter bored pile in deep water is studied. The spread drill, application of PHP mud, and choice of machine are solved by adopting two machines of KTY4000 and KPG300A. Besides, the airlift reversing circulation is selected in slag discharge. The results show that this method can ensure successfully the construction of pier foundation to satisfy the demands of codes. __________ Translated from Construction Technology, 2008, 37(7): 5–7 [译自:施工技术]     

逐点比较法插补轨迹php仿真实现

为了更好地认识插补原理,本文阐明了使用php语言实现四象限直线、顺圆和逆圆逐点比较插补算法仿真.     

A novel approach for the complete removal of threading dislocations from ZnSe on GaAs (001)

Here we demonstrate a novel approach to the complete removal of threading dislocations in ZnSe on GaAs (001). This approach, which we call patterned heteroepitaxial processing (PHP), involves post-growth patterning and thermal annealing. Eyitaxial layers of ZnSe on GaAs (001) were grown to thicknesses of 2000–6000 A by photoassisted metalorganic vapor phase epitaxy (MOVPE). Following growth, layers were patterned by photolithography and then annealed at elevated temperatures under flowing hydrogen. Threading dislocation densities were determined using a bromine/methanol etch followed by microscopic evaluation of the resulting etch pit densities. We found that as-grown layers contained more than 107 CM-2 threading dislocations. The complete removal of threading dislocations was accomplished by patterning to 70 gm by 70∼tm square regions followed by thermal annealing for 30 minutes at temperatures greater than 5000C. Neither post-growth annealing alone nor post-growth patterning alone had a significant effect. The effectiveness of this approach dminishes significantly below 500 C so that annealing at 400 C produces no measurable effect. We propose that the underlying mechanism for dislocation removal is the thermally activated glide of dislocations to the sidewalls of patterned regions, as promoted by sidewall image forces.     

基于JSON的Android 校园助手研究与设计

本文设计了一款Android 校园助手软件,客户端采用Android Studio 作为开发平台,以JSON 数据格式为载 体。详细阐述了JSON数据格式的使用,Gson 在校园助手中数据JSON格式化及JSON数据对象化的应用,以及客户端和服务 端的交互,这些实现技术对开发相关项目具有现实的参考价值。     

Construction technology on pile foundation of No. 6 main pier in Dashengguan Yangtze Bridge

Based on pile foundation construction of No. 6 main pier, deep mudstone geological foundation and deep-water construction in Nanjing-Dashengguan Yangtze Bridge, the method of super-large-diameter bored pile in deep water is studied. The spread drill, application of PHP mud, and choice of machine are solved by adopting two machines of KTY4000 and KPG300A. Besides, the airlift reversing circulation is selected in slag discharge. The results show that this method can ensure successfully the construction of pier foundation to satisfy the demands of codes.     

基于Web文档在线浏览的实现

提出基于Web的文档在线浏览实现方案。该方案能够实现各种文档的在线浏览功能。文中主要讲述如何高效地将文档文件转换为swf文件,并利用FlexPaper开源平台实现浏览器在线浏览过程。系统主要实现了文档转换、文档传输和文档在线浏览功能,效果理想。     

基于多数可变规则的校内交友平台的设计与实现

本文详细分析了基于多数可变规则的校内交友平台的设计。此平台为在校生在线上汇聚交友信息,在线下进 行社交活动,主要使用java、SQL、PHP 等编程语言开发,运行于安卓系统中。     

基于C#的SECRAL-Ⅱ数据归档系统

超导电子回旋共振离子源II(Superconducting Electron Cyclotron Resonance ion source with Advanced design in Lanzhou-II,SECRAL-II)控制系统采用实验物理与工业控制系统(Experimental Physics and Industrial Control System,EPICS)架构,其中数据归档子系统主要用来存储离子源电源、真空、束诊、水压等数据,便于技术人员进行在线和离线数据分析,是其控制系统的重要组成部分。EPICS自带的Channel Archiver存储格式固定,无法满足用户的实际使用需求。使用C#实现了EPICS架构下变量(Process Variable,PV)历史数据的存储功能,结合Oracle数据库技术,使得在存储PV变量的策略上可以更加灵活控制。同时,实现了基于超文本预处理器(Hypertext Preprocessor,PHP)的文件管理系统,用于历史数据文件的管理。测试及运行结果表明系统可以很好地满足研究人员对于历史数据的归档要求和研究需求。