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浏览/检索结果: 共16条，第1-10条 帮助

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Spatial patterns of light response parameters and their regulation on gross primary productivity in China 期刊论文  OAI收割
AGRICULTURAL AND FOREST METEOROLOGY, 2024, 卷号: 345, 页码: 11
作者:  Lin, Yong;  Chen, Zhi;  Yu, Guirui;  Yang, Meng;  Hao, Tianxiang
  |  收藏  |  浏览/下载：28/0  |  提交时间：2024/01/22
Identification of Multiscale Spatial Structure of Lunar Impact Crater: A Semivariogram Approach 期刊论文  OAI收割
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, 2021, 卷号: 14, 页码: 2731-2739
作者:  Wang, Jiao;  Ming, Dongping;  Cheng, Weiming
  |  收藏  |  浏览/下载：20/0  |  提交时间：2021/06/10
Identification of Multiscale Spatial Structure of Lunar Impact Crater: A Semivariogram Approach 期刊论文  OAI收割
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, 2021, 卷号: 14, 页码: 2731-2739
作者:  Wang, Jiao;  Ming, Dongping;  Cheng, Weiming
  |  收藏  |  浏览/下载：22/0  |  提交时间：2021/06/10
Quantitative spatial distribution model of site-specific loess landslides on the Heifangtai terrace, China 期刊论文  OAI收割
LANDSLIDES, 2020, 页码: DOI: 10.1080/15569543.2020.1780615
作者:  Zhou Qi;  Xu Qiang;  Peng Dalei;  Fan Xuanmei;  Ouyang Chaojun
  |  收藏  |  浏览/下载：165/0  |  提交时间：2020/11/18
Debris-flows scale predictions based on basin spatial parameters calculated from Remote Sensing images in Wenchuan earthquake area 会议论文  OAI收割
35th International Symposiumon Remote Sensing of Environment (ISRSE35), Beijing, 2013.4.22-26
作者:  Jianrong Fan;  Fan Jianrong
收藏  |  浏览/下载：33/0  |  提交时间：2014/12/12
Hybrid Optimal Design of the Eco-Hydrological Wireless Sensor Network in the Middle Reach of the Heihe River Basin, China SCI/SSCI论文  OAI收割
2014
作者:  Ge Y.
收藏  |  浏览/下载：35/0  |  提交时间：2014/12/24
Concomitant flow and space variations of evapotranspiration due to changes in LUCC under seawater intrusion in a coastal region 会议论文  OAI收割
Remote Sensing and Modeling of Ecosystems for Sustainability X, San Diego, CA, United states, August 26, 2013 - August 29, 2013
Gao, Zhiqiang(1,3); Ning, Jicai(1); Cao, Xiaoming(2); Shi, Runhe(3); Gao, Wei(3)
收藏  |  浏览/下载：140/0  |  提交时间：2015/08/10
Predicting Volume and Runout of Single Gully Debris-Flow Using Hypsometric Integral Value in the Wenchuan Earthquake Area 会议论文  OAI收割
Proceedings of the International Symposium on Earthquake-Induced Landslides, Japan, 2012
作者:  Zhang, Huaizhen;  Fan, Jianrong;  Liu, Qing
收藏  |  浏览/下载：21/0  |  提交时间：2016/12/05
Improved best tradeoff for high-resolution image fusion based on spectral reflection function 会议论文  OAI收割
International Conference on Earth Observation Data Processing and Analysis, ICEODPA,, Wuhan, China, December 28, 2008 - December 30,2008
Wang, Zhongwu; Zhao, Zhongming
收藏  |  浏览/下载：23/0  |  提交时间：2014/12/07
This paper extended the best tradeoff fast intensity-hue-saturation (BTFIHS) fusion to a more general model. Firstly  based-on the methods proposed by previous researches  we integrated injecting strategy of spatial detail information into the fusion model and also adopted the idea of BTFIHS to keep the intensity unchanged with the corresponding pixel in panchromatic (PAN) image  while the hue and saturation of every pixel using BTFIHS were equal to them using tradeoff fast intensity-hue-saturation (TFIHS). Then we got a general formula of the improved best tradeoff for high-resolution image fusion based-on getting injecting parameter by spectral reflection function (SRF). At last  several experiments were carried on to analysis and discuss the quality of the new methods compared with their originals. Results show that the new method could yield a "true" high-resolution multispectral (MS) image  with vast improvement in blue band and nearly 3.3% improvement in Q4 for all bands. 2008 SPIE.  
Research on the support structure of the primary mirror of large-aperture telescope (EI CONFERENCE) 会议论文  OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China
Yang W.; Jingxu Z.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
Large-aperture telescope can be used in surveying battlefield  researching landform  searching object  real-time monitoring  imaging  detecting and identifying spatial targets and so on. A large-aperture telescope for achieving high resolution power is designed to monitor spatial target and image in real time. Real-time monitoring plays an important role in military conflicts. The orbit parameter of object  quantity  geometrical shape parameter and so on can be obtained by detect spatial target. With the development of optical technology  people require larger aperture in optics-electronic (OE) system. By increasing optical aperture  the ability of collecting light and resolution power in the system can be enhanced. But the support structure of the primary mirror of large-aperture telescope will be a very difficult problem. With the increase of primary mirror aperture  the weight of the primary mirror will become larger than before. The root mean square (rms) of the primary mirror is affected by many factors  such as deadweight  deformation of heat  environment and so on. Due to the primary mirror of telescope is an important component of telescope system. By reducing the weight of primary mirror  precision of the system is ensured. During the designing phase  one can consider the supporting project of the primary mirror synthetically and analyze it roundly according to technical requirement of optical system and the effect factors. The final structural design can be reasonable. In an astronomical telescope  the surface of reflector is an important part for collecting dark radiation of celestial bodies. Its surface shape will have an effect on collecting efficiency of telescope radiant energy directly. So the rms must be very high. Optical system of large aperture  small wavelength and small focus can receive maximal light intensity. For ground-based optical astronomical telescope  the design proposed in the paper can satisfy the requirement of the possible minimum atmosphere seeing at astronomical observatory site and exert the use efficiency of the telescope adequately. So the accuracy of the traditional surface of reflector can assure that 90% of all the light energy can be focused on within the angle diameter range of the minimum atmosphere seeing  then 100% of light energy should be focused on the angle diameter range of minimum atmosphere seeing. Because the rms of mirror is very high  precise surface machining and accurate the support of mirror are very important tasks during designing and manufacturing the telescope. In the paper  various support techniques of a large-aperture telescope primary mirror are discussed and a 3.5 meter telescope system at the Starfire Optical Range (SOR) overviewed simply  which was operated by the Directed Energy Directorate of the Air Force Research Laboratory  Kirtland AFB  NM  USA from the ground-based O-E system for the observations of spatial target. We also analyze Theoretical elastic deformation of the Steward Observatory 2.3 meter mirror is analyzed.