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PDF文件格式进行介绍，对正在进行PDF二次开发的人员有一定参考价值。(Specification of PDF File Format)

北斗系统空间信号接口控制文件正式版。北斗系统基本服务性能如下：位置精度：平面 10米、高程10米；测速精度每秒0.2米；授时精度单向50纳秒；可提供双向高精度授时和短报文通信服务。通过广域差分和地基增强等手段，北斗系统服务 性能还可进一步提高，满足各类用户需求。(Official version of the the Beidou system space signal Interface Control Document. The Beidou system performance are as follows: position accuracy: plane 10 meters, 10 m elevation velocity accuracy of 0.2 meters per second timing accuracy of the one-way 50 nanoseconds provide two-way high-precision timing and short message communication service. By means of wide area differential and ground-based augmentation Beidou system performance can be further improved to meet the needs of all types of users.)

IEEE standard Common Format for Transient Data Exchange (COMTRADE) for power systems.pdf电力系统故障录波的标准数据格式(IEEE standard Common Format for Transient Data Exchange (COMTRADE) for power systems.pdf power system fault recorder standard data format)

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说明：  全面详细解读MATLAB优化算法，序列二次规划、共轭梯度，拟牛顿法等(Comprehensively and detailedly interpret the optimization algorithm of MATLAB)

关于车辆管理系统的毕业论文 系统流程图 框架 (on vehicle management system dissertation system flowchart framework)

这个讲述DICOM文件的结构，和用3种开发包运用(About the structure of the DICOM file, use and development of three kinds of package)

医疗器械注册管理办法 医疗器械行业相关法规和管理方法(Medical Device Registration)

是提供的一个图片管理程序；用户可以借助于该程序(Is to provide an image management procedures users can help the program)

DS1341-DS1342相关的参数介绍，型号非常完整(DS1341-DS1342-related parameters described, a very complete model)