机构

• 地理科学与资源研究所 [3]
• 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 [2]
• SCI/SSCI论文 [1]
• 会议论文 [1]

发表日期

• 2017 [2]
• 2013 [1]
• 2007 [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 Observed Effects of Vegetation Growth on Temperature in the Early Summer over the Northeast China Plain 期刊论文  OAI收割 ATMOSPHERE, 2017, 卷号: 8, 期号: 6, 页码: 11 作者:  Li, Xiaxiang;  Zhang, Xuezhen;  Zhang, Lijuan   |  收藏  |  浏览/下载：10/0  |  提交时间：2019/09/25 vegetation growth  warming/cooling effects  northeastern China  evapotranspiration  greenhouse effect   Observed Effects of Vegetation Growth on Temperature in the Early Summer over the Northeast China Plain 期刊论文  OAI收割 ATMOSPHERE, 2017, 卷号: 8, 期号: 6, 页码: 11 作者:  Li, Xiaxiang;  Zhang, Xuezhen;  Zhang, Lijuan   |  收藏  |  浏览/下载：14/0  |  提交时间：2019/09/25 vegetation growth  warming/cooling effects  northeastern China  evapotranspiration  greenhouse effect   Warming/cooling effects of cropland greenness changes during 1982-2006 in the North China Plain SCI/SSCI论文  OAI收割 2013 Zhang X. Z.; Tang Q. H.; Zheng J. Y.; Ge Q. S. 收藏  |  浏览/下载：21/0  |  提交时间：2014/12/24 NDVI changes  warming/cooling effects  North China Plain  canopy  transpiration  difference vegetation index  land-use  interannual variations  climate  feedbacks  united-states  daily maximum  cover  fraction  impacts  ndvi   Narcissus analysis for cooled staring IR system (EI CONFERENCE) 会议论文  OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China 作者:  Zhang X.;  Zhang X.;  Zhang X. 收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25 Narcissus can have a deleterious effect on image quality for cooled infrared imaging systems. Therefore  analysis of narcissus is important for designing both scanning and staring optics. Narcissus is generally assumed to be negligible in staring IR optical designs because the shading effects can be removed by calibration of the detector array data. However  the calibration usually decreases sensitiveness of the system and Narcissus variation may be noticeable for sensors when the conditions changes as follows: 1. warming and cooling the optical housing  2. zooming optical elements  3. movement of lenses for focus. In that case  it will result in shading and other image defects even after calibration. To minimize these effects  narcissus should be assessed and controlled during the design of staring array IR system. We provided a direct and fast method for analyzing the narcissus variation in the presence of software such as LightTools  TracePro and ASAP  and proposed the principles in optical design of staring IR systems to reduce narcissus. A cooled staring IR system with serious narcissus was estimated and reoptimized. Narcissus analysis of this IR system confirmed the efficiency of the analysis method.