QQ客服 官方微博 反馈留言

浏览/检索结果: 共4条，第1-4条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序作者升序作者降序提交时间升序提交时间降序题名升序题名降序 Compact broadband circularly-polarised directional universal GNSS antenna with symmetric radiation pattern and stable near-zenith coverage 期刊论文 IET MICROWAVES ANTENNAS & PROPAGATION, 2017, 卷号: Vol.11 No.5, 页码: 657-663 作者:  Liu, Q;  Li, Y;  Mo, ZG;  Liu, YA 收藏  |  浏览/下载：10/0  |  提交时间：2019/12/31 satellite navigation  directive antennas  broadband antennas  antenna radiation patterns  antenna feeds  UHF antennas  power dividers  phase shifters  electromagnetic wave polarisation  compact broadband circularly-polarised directional universal GNSS antenna  symmetric radiation pattern  near-zenith coverage  CP antennas  global navigation satellite system  circular radiating patch  semisector-annulus sheets  compact broadband four-feed circuit  out-of-phase power splitter  coupled-line power dividers  broadband phase shifters  output magnitude distribution  high-precision feed signals  gain variation  CP bandwidth  symmetric patterns  street canyons  mountainous area  frequency 1  13 GHz to 2  51 GHz   A thermal LBM model for studying complex flow and heat transfer problems in body-fitted coordinates 期刊论文 INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2015, 卷号: 98, 页码: 266-276 作者:  Li, Weizhong;  Zhou, Xun;  Dong, Bo;  Sun, Tao 收藏  |  浏览/下载：4/0  |  提交时间：2019/12/09 Thermal LBM model  GILBM  Circular cylinder  Horizontal annulus  Convective heat transfer   Detection of a radial crack in annular structures using guided circumferential waves and continuous wavelet transform 期刊论文 2012 Liu, Yu; Li, Zheng; Gong, Kezhuang 收藏  |  浏览/下载：2/0  |  提交时间：2015/11/12 Radial crack  Guided circumferential wave  Gabor wavelet  PZT sensors  CIRCULAR ANNULUS  DAMAGE  IDENTIFICATION  CYLINDERS  SENSORS  PIPES   Thermoelastic analysis of functionally graded annulus with arbitrary gradient 期刊论文 Applied Mathematics and Mechanics (English Edition), 2009, 卷号: 30, 期号: 10, 页码: 1211-1220 作者:  Peng XL(彭旭龙);  Li XF(李显方) 收藏  |  浏览/下载：1/0  |  提交时间：2019/12/03 functionally graded materials  thermoelastic analysis  arbitrary gradient  circular annulus