中国科学院机构知识库网格系统: 检索

Optimization of the epitaxial structure of low-loss 885nm high-power laser diodes 会议论文 OAI收割
Shanghai, China, 2021-06-03
作者: Wu, Shun-Hua; Li, Te; Wang, Dan; Yu, Xue-Cheng; Wang, Zhen-Fu

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收藏 | 浏览/下载：42/0 | 提交时间：2022/01/21

885nm low loss asymmetric waveguide high power high power conversion efficiency

Synthesis and photovoltaic properties of new D-A copolymers based on 5,6-bis(2-ethylhexyl)naphtha[2,1-b:3,4-b]dithiophene-2,9-diyl] donor and fluorine substituted 6,7-bis(9,9-didodecyl-9h-fluoren-2-yl)[1,2,5] thiadiazolo[3,4-g]quinoxaline acceptor units 期刊论文 OAI收割
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2018, 卷号: 56, 期号: 12, 页码: 1297-1307
作者: Keshtov, Mukhamed L.; Konstantinov, Igor O.; Kuklin, Sergei A.; Khokhlov, Alexei R.; Nekrasova, Natalia V.

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收藏 | 浏览/下载：31/0 | 提交时间：2019/04/09

D-a Copolymers Low Band Gap Low Energy Loss Polymer Solar Cells Power Conversion Efficiency

High-power, high-efficiency 808 nm laser diode array 期刊论文 OAI收割
acta physica sinica, 2016, 卷号: 65, 期号: 16
作者: Wang Zhen-Fu; Yang Guo-Wen; Wu Jian-Yao; Song Ke-Chang; Li Xiu-Shan

收藏 | 浏览/下载：21/0 | 提交时间：2016/10/14

laser diode array power conversion efficiency absorption loss asymmetric broad waveguide

GIS-based effect assessment of soil erosion before and after gully land consolidation: A case study of Wangjiagou project region, Loess Plateau SCI/SSCI论文 OAI收割
2015
作者: Liu Y. S.; Guo, Y. J.; Li, Y. R.; Li, Y. H.

收藏 | 浏览/下载：50/0 | 提交时间：2015/12/09

gully land consolidation land-resource engineering revised universal soil loss equation (RUSLE) effect assessment Loess Plateau green program loss equation china water grain conservation county agriculture conversion

Understory vegetation leads to changes in soil acidity and in microbial communities 27 years after reforestation SCI/SSCI论文 OAI收割
2015
作者: Fu X. L.; Yang, F. T.; Wang, J. L.; Di, Y. B.; Dai, X. Q.

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收藏 | 浏览/下载：19/0 | 提交时间：2017/11/09

Aboveground diversity Understory vegetation Soil acidification Microbial community composition leafed evergreen forest functional-group loss plantation forests larch plantations subtropical area litter china removal pure conversion

Theoretical evaluation on the impact of heat exchanger in Advanced Adiabatic Compressed Air Energy Storage system 期刊论文 OAI收割
ENERGY CONVERSION AND MANAGEMENT, 2014, 卷号: 86, 页码: 1031-1044
作者: Yang, Ke; Zhang, Yuan; Li, Xuemei; Xu, Jianzhong

收藏 | 浏览/下载：33/0 | 提交时间：2015/12/10

Advanced Adiabatic Compressed Air Energy Storage Thermodynamic analysis Heat exchanger effectiveness Pressure loss Energy conversion and utilization

Decoupling cultivated land loss by construction occupation from economic growth in Beijing SCI/SSCI论文 OAI收割
2014
作者: Song W.

收藏 | 浏览/下载：40/0 | 提交时间：2014/12/24

Cultivated land loss Urban expansion Economic growth Population growth Decoupling Beijing rural-urban migration agricultural productivity china urbanization expansion policy conversion reform population protection

Implications of land-use change in rural China: A case study of Yucheng, Shandong province SCI/SSCI论文 OAI收割
2014
Liu Y. S.; Yang R.; Long H. L.; Gao J.; Wang J. Y.

收藏 | 浏览/下载：49/0 | 提交时间：2014/12/24

Multi-stage land-use change Farmland loss Rural settlements Institutional forces Urban-rural development Rural China eastern coastal china driving forces agricultural land patterns policy countryside cover conversion expansion dynamics

Characterization of a quasi-optical NbN superconducting HEB mixer 期刊论文 OAI收割
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2006, 卷号: 54, 期号: 7, 页码: 2944-2948
作者: Jiang, Ling; Miao, Wei; Zhang, Wen; Li, Ning; Lin, Zhen Hui

收藏 | 浏览/下载：25/0 | 提交时间：2012/02/07

Allan variance conversion loss 4-K close-cycled cryocooler noise temperature superconducting hot-electron bolometer (HEB) mixer

Measuring the system gain of the TDI CCD remote sensing camera (EI CONFERENCE) 会议论文 OAI收割
Advanced Materials and Devices for Sensing and Imaging II, November 8, 2004 - November 10, 2004, Beijing, China
Ya-xia L.; Hai-ming B.; Jie L.; Jin R.; Zhi-hang H.

收藏 | 浏览/下载：62/0 | 提交时间：2013/03/25

The gain of a TDI CCD camera is the conversion between the number of electrons recorded by the TDI CCD and the number of digital units (counts) contained in the CCD image"[1]. TDI CCD camera has been a main technical approach for meeting the requirements of high-resolution and lightweight of remote sensing equipment. It is useful to know this conversion for evaluating the performance of the TDI CCD camera. In general a lower gain is better. However the resulting slope is the gain of the TDI CCD. We did the experiments using the Integration Sphere in order to get a flat field effects. We calculated the gain of the four IT-EI-2048 TDI CCD. The results and figures of the four TDI CCD are given. this is only true as long as the total well depth (number of electrons that a pixel can hold) of the pixels can be represented. High gains result in higher digitization noise. System gains are designed to be a compromise between the extremes of high digitization noise and loss of well depth. In this paper the mathematical theory is given behind the gain calculation on a TDI CCD camera and shows how the mathematics suggests ways to measure the gain accurately according to the Axiom Tech. The gains were computed using the mean-variance method also known as the method of photon transfer curves. This method uses the effect of quantization on the variance in the measured counts over a uniformly illuminated patch of the detector. This derivation uses the concepts of signal and noise. A linear fit is done of variance vs. mean