中国科学院机构知识库网格系统: 检索

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	玛纳斯河流域积雪参数反演及径流模拟研究学位论文 OAI收割北京: 中国科学院大学, 2020 作者: 任伟伟 \| 收藏 \| 浏览/下载：49/0 \| 提交时间：2021/12/10 MODIS 积雪去云综合概率雪水当量 TRMM 降水校正 SPHY 水文模型 MODIS snow remove cloud Comprehensive probability Snow water equivalent TRMM precipitation correction SPHY hydrological model
	城市化区域的生态风险评价方法与管控策略研究——以北京市为例学位论文 OAI收割北京: 中国科学院生态环境研究中心, 2020 作者: 刘长峰 \| 收藏 \| 浏览/下载：51/0 \| 提交时间：2021/07/07 城市化，复合生态风险，生态风险概率，生态风险指数，蒙特卡洛模拟，copula 模型，生态风险驱动与管控 Urbanization Comprehensive Ecological Risk Assessment Ecological Risk Probability Ecological Risk Index Monte Carlo Simulation Copula Model Ecological Risk Drive, Control And Management
	Ecological Risk Assessment of Benzo[a]pyrene in Yellow River Delta 期刊论文 OAI收割 CLEAN-SOIL AIR WATER, 2013, 卷号: 41, 期号: 4, 页码: 370-376 作者: Jin, Qin; Jiang, Qunou; Wu, Feng; Li, Xing; Deng, Xiangzheng \| 收藏 \| 浏览/下载：33/0 \| 提交时间：2019/09/26 Benzo[a]Pyrene Comprehensive Ecological Risk Assessment Ecological Risk Probability Oil Pollution Yellow River Delta
	Ecological Risk Assessment of Benzo[a]pyrene in Yellow River Delta 期刊论文 OAI收割 CLEAN-SOIL AIR WATER, 2013, 卷号: 41, 期号: 4, 页码: 370-376 作者: Jin, Qin; Jiang, Qunou; Wu, Feng; Li, Xing; Deng, Xiangzheng \| 收藏 \| 浏览/下载：17/0 \| 提交时间：2019/09/26 Benzo[a]Pyrene Comprehensive Ecological Risk Assessment Ecological Risk Probability Oil Pollution Yellow River Delta
	Ecological Risk Assessment of Benzo[a]pyrene in Yellow River Delta 期刊论文 OAI收割 CLEAN-SOIL AIR WATER, 2013, 卷号: 41, 期号: 4, 页码: 370-376 作者: Jin, Qin; Jiang, Qunou; Wu, Feng; Li, Xing; Deng, Xiangzheng \| 收藏 \| 浏览/下载：25/0 \| 提交时间：2019/09/26 Benzo[a]Pyrene Comprehensive Ecological Risk Assessment Ecological Risk Probability Oil Pollution Yellow River Delta
	Ecological Risk Assessment of Benzo a pyrene in Yellow River Delta SCI/SSCI论文 OAI收割 2013 Jin Q.; Jiang Q. O.; Wu F.; Li X.; Deng X. Z. 收藏 \| 浏览/下载：28/0 \| 提交时间：2014/12/24 Benzo[a]pyrene Comprehensive ecological risk assessment Ecological risk probability Oil pollution Yellow River Delta metal contamination trace-elements wetland soils china sediments nutrients model basin
	Evaluation of the operating range for ground-based infrared imaging tracking system (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China 作者: Zhang Z.-D. 收藏 \| 浏览/下载：50/0 \| 提交时间：2013/03/25 Ground-based infrared imaging tracking system (GIITS) is of great importance for aerial target warning and guard. The operating range is one of the key performance specifications on the other which should be calculated calculate the radiation power received on the detector in order to analysis whether the output signal meets the detection requirements or not analyzed and studied during the whole GIITS design process. The operating range is mostly influenced by a few factors without considering the effect of the background radiation. By improving of the traditional method including atmospheric attenuation a new operating range calculation model of the GIITS was established based on two requirements. One is that the image size of observed target should meet the requirement of the processor signal extraction. The number of the pixel occupied by target image should be more than 9. The other is that the signal noise ratio (SNR) of the GIITS should not be less than 5 to meet the requirements of the target detection probability and spatial frequency. The SNR calculation equation in form of energy is deduced and the radiation characteristic of the observed target and background are analyzed. When evaluate the operating range of the GIITS using the new method the performance of GIITS and feature of target and background. This paper firstly makes analysis and summarization on the definite localizations of the traditional operating range equation of the GIITS. The localizations are mainly in two aspects. On one hand we should successively calculate two operating range values according to two requirements mentioned above and choose the minimum value as the analytic result. In the end the dispersion of the image and the effect of image dispersion are not considered in the traditional method an evaluation of operating range for fighter aircraft is accomplished as an example. The influence factors in every aspect on operating range were explored by the calculated result. The new operating range calculation model provides the theoretical basis for the design and applications as well as the comprehensive evaluation of a GIITS. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
	基于关联概率模型的指纹识别算法学位论文 OAI收割工学硕士, 中国科学院自动化研究所: 中国科学院研究生院, 2003 何余良收藏 \| 浏览/下载：85/0 \| 提交时间：2015/09/02 生物识别技术关联概率模型关联关系可变界限盒综合细节点 biometrical identification technology correlative probability model relative relationship invariable-bounding comprehensive minu