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浏览/检索结果: 共5条，第1-5条 帮助 限定条件 专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 高温透波陶瓷材料研究进展 期刊论文 现代技术陶瓷, 2019, 卷号: 40, 期号: Z1, 页码: 4-120 作者:  蔡德龙;  陈斐;  何凤梅;  贾德昌;  匡宁 收藏  |  浏览/下载：1/0  |  提交时间：2020/08/24 空天飞行器  透波陶瓷材料  透波材料设计要求  测试方法及原理   面积约束下的最优阈值法分割LED像素点阵 期刊论文 液晶与显示, 2012, 期号: 05, 页码: 653-657 于洪春; 邓意成; 郑喜凤 收藏  |  浏览/下载：59/0  |  提交时间：2013/03/11 最优阈值  面积约束  LED   基于光纤的LED显示屏实时数字视频传输系统的设计 期刊论文 液晶与显示, 2009, 期号: 4 丁铁夫; 于洪涛; 郑喜凤; 刘超; 苑振 收藏  |  浏览/下载：21/0  |  提交时间：2012/09/25 FPGA  光纤  集线器  千兆以太网光纤转换   Correction method for detection of the frequencies of railway fsk signals (EI CONFERENCE) 会议论文 2008 9th International Conference on Signal Processing, ICSP 2008, October 26, 2008 - October 29, 2008, Beijing, China Xuguang Y.; Yu J.; Xifeng Z.; Tiefu D. 收藏  |  浏览/下载：56/0  |  提交时间：2013/03/25 In order to acquire the information of railway binary frequency-shift keying signals  which include upper/down side frequencies and base low-frequency with high-accuracy  a novel frequency detection algorithm for France UM-71 system is proposed. Combining fast Fourier transform with the ratio correction method  the carrier frequency and the base frequency are obtained. Furthermore  the hardware consumption has been decreased. And it possesses the advantage of simple algorithm and fast operation speed. Comparing with the detection of the base frequency  the upper/down side frequency of railway signal is more difficult. Based on spectrum analysis and the spectrum correction  a new method  which adopts the sliding window  is put forward in this paper. The absolute differences between the upper side frequencies and the down side frequencies obtained are regarded as the criterion for judgment. Then the set of data  in which the maximum absolute value is  is to be the result of the upper/down side frequency. Because the sliding window will go through every stage when the upper/down side frequency changes  therefore  it is not sensitive enough to the position of data which need to be transformed. Using the method mentioned above  the experiment results show that the accuracy requirement of the side frequency is satisfied well. 2008 IEEE.   混合字体字色的点阵条屏的实现方法 期刊论文 液晶与显示, 2006, 期号: 2 邓春健; 于德新; 陈宇; 郑喜凤 收藏  |  浏览/下载：9/0  |  提交时间：2012/09/25 LED显示  Windows矢量字库  点阵条屏