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The Design and Exploiture of a Data Processing System of Strong Motion Network Center

Author: LiuYingHua
Tutor: YaoGuoQing；JiHong
School: Chinese Geology University (Beijing)
Course: Computer technology
Keywords: Strong shock Communicate Data transmission Waveform display
CLC: TP311.52
Type: Master's thesis
Year: 2008
Downloads: 38
Quote: 0
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Abstract


The exact meaning of the strong motion observation (Strong Motion Instrumentation) is a strong motion observation , it is the use of instruments to observe the strong earthquake ground motion process and reaction engineering structures under seismic action , and thus learning for the earthquake engineering and near-field earthquake provide basic research data . Strong earthquake quick report network construction is part of the security measures in Beijing , as part of earthquake relief , particularly great significance to the security and prosperity of Beijing . The Eclipse RCP able to give developers the ability to create scalable client application also provides the ability to write rich client code with the distinctive features of the local perception and experience to the majority of Java developers . According to the characteristics of the java language , Eclipse RCP development platform , software design and development . JUnit JAVA code becomes more robust , more reliable . Socket is the application layer and the TCP / IP protocol family communication middleware abstraction layer , it is a set of interfaces . The system uses the Socket communication and strong earthquakes each sub- station , data communication , each sub- station defined packet format to send data to the system . The system is responsible for receiving and caching the data received . CD-1.1 protocol is a professional transfer data protocol of the seismic system , it is not only run in a reliable protocol , and can run on UDP protocol or other agreement . Send and receive support to more than one place , you can use more than one IP . According to the characteristics of CD - 1.1 protocol and Socket communication , receiving multiple stations to transmit data . Solve previous issues must be 24 - hour real-time transmission of data . Can now not only intermittent transmission , and control command in the data transfer process can be carried out between the various stations , command control communications . Check the completeness and correctness of the frame with Crc64 Steim1 compression method to reduce the amount of data , the DSS digital signature to ensure the safety and reliability of the data transmission . Use the Eclipse plug-in based extended the idea , to build an application for waveform display , so receiving the sub- station data waveform display , the seismic waveform display is divided into three components : the vertical component of the north-south component , and something component . Display waveform zoom and location at any time and can be adjusted .

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