X射线衍射仪远程网络实验室开发

发布时间：2018-05-05 06:42

本文选题：X射线衍射 + 远程实验　；参考：《吉林大学》2015年硕士论文

【摘要】：X射线衍射分析是进行化学、材料、物理、地质、电子、环境等多学科研究的必备基本分析手段，但仪器价格昂贵，对教学来说仍然是一种稀缺资源。故X射线衍射分析有必要通过网络化教学对学生和研究人员进行知识普及，提高实验水平。从20世纪90年代初到目前为止，已经建立了十余个科学仪器网络实验系统，它们在提升仪器利用率和异地专家协同实验等方面取得了显著成果。但是未见大型分析仪器，特别是X射线衍射仪用于网络实验教学的报道。针对上述问题，本文开发了一套X射线衍射仪远程网络实验室，将X射线衍射用于教学工作。结合现有的科学仪器网络实验室和网络教学，构建了X射线衍射仪远程网络实验室的系统框架，包括网络实验教学管理、实验互动交流、实验过程同步播放、实验信息共享、实验案例点播五个子系统，具有现场视频与计算机屏幕视频的实时播放、语音交互、实验案例点播、课程预约、信息发布、实验报告上传、成绩记录等功能。设计基于B/S结构的软件框架，分为数据库、Web服务器和管理员软件。系统数据库使用MySQL软件进行开发，并从逻辑结构设计和物理设计两方面进行设计。Web服务器使用Java语言结合SSH框架和AJAX技术开发；设计了课程预约的流程，，解决过多人同时上课网络拥堵的问题；采用基于FTP传输协议的文件传输模式，解决了传统文传输时电脑易感染病毒的问题，实现了实验信息的共享；采用flowplayer页面播放器，实现了实验案例的点播。管理员软件使用C++语言结合ActiveX技术开发，包括同步播放控件，互动交流控件和多条管理线程。设计了常规显示、教师主控、学生主控、学生收听，学生发言等情况下的工作流程，解决了多通道视频源同时显示，浪费带宽的和传统网络教育语音模式单一的问题。实现了对视频源的控制、管理以及教师与多位学生双向多点之间的互动交流。本文针对于Web服务器和管理员软件进行了功能测试，各项指标符合预期的设计。并在吉林大学X射线衍射中心完成安装及调试，展开了试验教学应用工作，运行状态良好，性能稳定。
[Abstract]:X-ray diffraction analysis (XRD) is a basic analysis method for chemistry, materials, physics, geology, electronics, environment and so on. However, the instrument is expensive and is still a scarce resource for teaching. So it is necessary to popularize the knowledge of students and researchers through network teaching in order to improve the experimental level. From the beginning of 1990s to now, more than ten network experimental systems of scientific instruments have been established, and they have made remarkable achievements in improving the utilization rate of instruments and cooperative experiments among experts in different places. However, no large-scale analytical instruments, especially X-ray diffractometer, have been reported for network experiment teaching. In order to solve the above problems, a set of remote network laboratory of X-ray diffractometer is developed in this paper, and X-ray diffraction is used in teaching. Combined with the existing network laboratory of scientific instruments and network teaching, the system frame of remote network laboratory of X-ray diffractometer is constructed, including network experiment teaching management, experiment interactive communication, experiment process playing synchronously, experiment information sharing, etc. The five subsystems of experimental caseon-on-demand have the functions of real-time playing of live video and computer screen video, voice interaction, experimental caseon-on-demand, course reservation, information publishing, report uploading, score recording and so on. The software framework based on B / S structure is designed, which is divided into database server and administrator software. The database of the system is developed with MySQL software, and the web server is designed from the two aspects of logical structure design and physical design. The web server is developed with Java language combined with SSH framework and AJAX technology, and the process of course reservation is designed. Solve the problem of network congestion of many people at the same time; adopt file transfer mode based on FTP protocol, solve the problem of computer infection virus in traditional text transmission, realize the sharing of experimental information; use flowplayer page player, The experimental case on demand is realized. The administrator software is developed with C language combined with ActiveX technology, including synchronous play control, interactive communication control and multiple management threads. In this paper, the working flow of conventional display, teacher control, student control, student listening, student speaking and so on is designed to solve the problems of multi-channel video source simultaneously displaying, wasting bandwidth and single traditional network education speech mode. The control and management of video source and the interaction between teachers and students are realized. This paper tests the function of Web server and administrator software, and the indexes accord with the expected design. The system was installed and debugged in the center of X-ray diffraction of Jilin University. The experimental teaching and application were carried out. The operation condition was good and the performance was stable.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O434.1;TP311.52

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