机构

• 地理科学与资源研究所 [2]
• 地质与地球物理研究所 [1]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [4]

内容类型

• 期刊论文 [3]
• 会议论文 [1]

发表日期

• 2022 [2]
• 2020 [1]
• 2005 [1]

学科主题

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发表日期升序发表日期降序提交时间升序提交时间降序作者升序作者降序 Evaluating the impacts of land use change on ecosystem service values under multiple scenarios in the Hunshandake region of China 期刊论文  OAI收割 SCIENCE OF THE TOTAL ENVIRONMENT, 2022, 卷号: 850, 页码: 14 作者:  Xiao, Yu;  Huang, Mengdong;  Xie, Gaodi;  Zhen, Lin   |  收藏  |  浏览/下载：38/0  |  提交时间：2022/11/09 Equivalent -coefficient method  GeoSOS -FLUS model  Hotspots  Gain and loss matrix  Agro-pastoral ecotones  Hunshandake   Evaluating the impacts of land use change on ecosystem service values under multiple scenarios in the Hunshandake region of China 期刊论文  OAI收割 SCIENCE OF THE TOTAL ENVIRONMENT, 2022, 卷号: 850, 页码: 14 作者:  Xiao, Yu;  Huang, Mengdong;  Xie, Gaodi;  Zhen, Lin   |  收藏  |  浏览/下载：44/0  |  提交时间：2022/11/09 Equivalent -coefficient method  GeoSOS -FLUS model  Hotspots  Gain and loss matrix  Agro-pastoral ecotones  Hunshandake   An Approach for Filter Divergence Suppression in a Sequential Data Assimilation System and Its Application in Short-Term Traffic Flow Forecasting 期刊论文  OAI收割 ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION, 2020, 卷号: 9, 期号: 6, 页码: 16 作者:  Tong, Xiaohua;  Wang, Runjie;  Shi, Wenzhong;  Li, Zhiyuan   |  收藏  |  浏览/下载：25/0  |  提交时间：2020/09/28 sequential data assimilation system  filter divergence  gain matrix  L-1-norm constrained  short-term traffic flow forecasting   Theoretical analysis of 980nm high power Vertical External-cavity Surface-emitting Semiconductor Laser (VECSEL) (EI CONFERENCE) 会议论文  OAI收割 ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China 作者:  Wang L.-J.;  Wang L.-J.;  Ning Y.-Q.;  Qin L. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 By using bottom-emitting structure  we will develop laser diode (LD) pumped 980 nm VECSEL with active region of InGaAs/GaAsP/AlGaAs system. Because the thickness of barrier layer and absorption layer exceed that of quantum well  single well approximation model (KP method) can be used to calculate the band structure of VECSEL. The Schrodinger equation of finite deep potential well can be adopted to calculate the energy level structures of electron  heavy and light holes. According to the transition selection rule  we theoretically obtained the emitting wavelength of VECSEL and calculated quasi-Femi energy of valence band and conduction band based on the analysis of energy level structure of electron and holes. By analyzing the gain of strained quantum wells  we calculated the gain of VECSEL using transition matrix elements of electron  heavy and light holes. We give out the threshold gain  output power and other characteristic parameters. We will study the configuration of VECSEL and pumping scheme. We designed external cavity mirror  active region and bottom-emitting structure. A LD-pumped vertical external cavity surface-emitting laser whose output power is greater than 1.0 W can be predicted.