DVB_T系统中信道编码的研究与FPGA实现，一篇很好的说是论文，caj阅读器浏览- Research and FPGA Implementation of Channel Coding in DVB-T Systems

软件 用于打开caj 格式的文档(The software used to open the caj format documents)

智能完井原理、理论计算、工具设计，编程计算，全电动井下地层流体智能控制(Intelligent completion principle, theoretical calculation, tool design, programming and calculation, intelligent control of all electric downhole formation fluid.)