机构

• 地理科学与资源研究所 [2]
• 长春光学精密机械与物... [1]
• 云南天文台 [1]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• 期刊论文 [2]

发表日期

• 2021 [3]
• 2008 [1]

学科主题

• 天文学 [1]
• 天文学::天体物理学 [1]
• 天文学::天体物理学... [1]

筛选

浏览/检索结果: 共4条，第1-4条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Surface Roughness Effect on L-Band Multiangular Brightness Temperature Modeling and Soil Liquid Water Retrieval of Frozen Soil 期刊论文  OAI收割 IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 2021, 卷号: 18, 期号: 9, 页码: 1615-1619 作者:  Wu, Xiaojing;  Zheng, Donghai   |  收藏  |  浏览/下载：43/0  |  提交时间：2021/11/05 Frozen soil  L-band microwave radiometry  multiangular brightness temperatures  polarization mixing  soil moisture and ocean salinity (SMOS)  surface roughness  Tibetan Plateau   Surface Roughness Effect on L-Band Multiangular Brightness Temperature Modeling and Soil Liquid Water Retrieval of Frozen Soil 期刊论文  OAI收割 IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 2021, 卷号: 18, 期号: 9, 页码: 1615-1619 作者:  Wu, Xiaojing;  Zheng, Donghai   |  收藏  |  浏览/下载：27/0  |  提交时间：2021/11/05 Frozen soil  L-band microwave radiometry  multiangular brightness temperatures  polarization mixing  soil moisture and ocean salinity (SMOS)  surface roughness  Tibetan Plateau   Ground experiment of a 50 mm balloon-borne coronagraph for near space project 会议论文  OAI收割 Chengdu, China, 2021-06-14 作者:  Liu Y(刘煜);  Zhang XF(张雪飞);  Song TF(宋腾飞);  Sun, Mingzhe;  Liu, Dayang   |  收藏  |  浏览/下载：65/0  |  提交时间：2022/03/07 coronagraph  scattered light  near space  Mt. Wumingshan  polarization brightness   High power diode laser with beam coupling (EI CONFERENCE) 会议论文  OAI收割 Optoelectronic Materials and Devices III, October 27, 2008 - October 30, 2008, Hangzhou, China 作者:  Wang L.;  Liu Y.;  Wang L.;  Liu Y.;  Liu Y. 收藏  |  浏览/下载：61/0  |  提交时间：2013/03/25 As the increasing applications of the semiconductor lasers in the laser processing  the single 2-D stack optic-power density has not satisfied the actual requirements. It demands to couple several diode laser stack beams to one to improve the brightness  and it becomes the central issue to adopt the appropriate beam coupling technology which would offer high quality and high efficiency. In this paper  it mainly introduces the beam shaping and the technology of spatial coupling  polarization coupling  and wavelength coupling. The coupling key elements are presented and indicated. Finally  the development of the diode laser on beam coupling in our country fell behind through analyzing the statement of the world. Our lab is studying on polarization coupling and wavelength coupling. We gain some results by phase  which the polarization coupling efficiency can achieve 90% for two LD stacks with seven bars whose luminous wavelength is 975nm and980nm.By two 808nm diode laser coupling  the efficiency of 60% can be achieved after focusing to the beam size of 22mm2. 2008 SPIE.