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浏览/检索结果: 共6条，第1-6条 帮助 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 一种快速鲁棒的SAR图像匹配算法 期刊论文 计算机科学, 2017, 期号: 7 作者:  吴鹏;  于秋则;  闵顺新 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/05 SAR图像配准  尺度空间  双边滤波  引导滤波  LDB  VFC   图像匹配算法在药盒实时识别中的应用研究 学位论文 2016 作者:  王紫薇 收藏  |  浏览/下载：4/0  |  提交时间：2019/12/05 药盒识别  图像匹配  显著性区域提取  ORB算子  LDB算子   基于小波包和局域判别基的脚步信号提取方法 期刊论文 小型微型计算机系统, 2012, 期号: 2, 页码: 424-427 张学渊; 曹红兵; 李宝清; 刘海涛 收藏  |  浏览/下载：7/0  |  提交时间：2013/02/22 脚步信号  特征提取  小波包(WP)  局域判别基(LDB)   异质界面数字梯度超晶格对扩展波长InGaAs光电探测器性能的改善 期刊论文 红外与毫米波学报, 2009, 期号: 06 王凯; 张永刚; 顾溢; 李成; 李好斯白音; 李耀耀 收藏  |  浏览/下载：15/0  |  提交时间：2012/01/06 无线传感器网络  特征提取  LDB  时频能量图  相对微分熵   Analysis of spectrum narrowing of diode laser bar (EI CONFERENCE) 会议论文 Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China Deng X.; Liu Y.; Yin H.; Feng G.; Gu Y.; Wang L. 收藏  |  浏览/下载：7/0  |  提交时间：2013/03/25 Laser diode bar (LDB) are used increasingly often for many applications  but spectral bandwidth of LDB are generally approximately 2-4nm  far too wide for many demanding applications  e.g. spin-exchange optical pumping  terahertz generation  and lidar. External-cavity feedback can improve the spectral properties of LD or LDB. However  spectrum narrowing of LDB is more difficult than that of LD. Bar curvature (i.e. "smile") produced in the manufacturing process affects the spectrum narrowing greatly. By geometrical optics approach and ORIGIN software  smile which can be corrected by plano-convex cylindrical lens is simulated and the result is in good agreement with experiment. The selection of grating which is also a critical factor of spectrum narrowing will be stated. Finally  an external cavity consisting of fast axis collimator  two plano-convex cylindrical lens and a diffraction grating is used. The scheme is implemented on a 19-element LDB and yields 3-fold reduction in spectral linewidth under the situation that all optical elements in the system which are not optimized. Further  we use a slit in the experiment and analyze the spectrum narrowing of each element in LDB.   Diagnosis of Prosthetic Heart Valve Using Locality Preserving Kernel Fisher Discriminant Analysis and Local Discriminant Bases (CPCI-S收录) 会议 作者:  Zhang, Di[1];  Du, Minghui[2] 收藏  |  浏览/下载：11/0  |  提交时间：2019/04/11 heart sounds  artificial heart valve  kernel-based method  locality preserving projection  LDB