搜索结果: 1-10 共查到“理学 LAI”相关记录10条 . 查询时间(0.031 秒)
叶面积指数(leaf area index,LAI)是影响植被蒸腾、降水截留和能量交换的关键参数,是生态模型和陆面过程模型的重要输入参数。目前,全球许多机构基于多种遥感数据,采用不同的反演方法得到了多种LAI产品,MODIS,CYCLOPES和GLASS是其中时空分辨率较高的3种。以植被类型多样的韩江流域为对象,通过分析这3种LAI产品的空间和时间一致性,得到以下结论: ①CYCLOPES LAI...
Professor Tze Leung Lai，Department of Statistics at Stanford University（图）
Professor Statistics
2016/5/24
My present research areas include sequential experimentation, adaptive design and control, stochastic optimization, time series analysis and forecasting, change-point detection, hidden Markov models a...
Professor Lai-Xi，Department of Chemistry & Biochemistry at University of Maryland（图）
Professor Lai-Xi Department of Chemistry & Biochemistry at University of Maryland
2016/5/18
Lai-Xi,Professor,Research Interests:Bioorganic Chemistry; Synthetic Carbohydrate Chemistry; Glycobiology; Enzymology; Molecular Biology; Immunology
Professor Dong Lai，Department of Astronomy at Cornell University（图）
Professor Dong Lai Department of Astronomy at Cornell University
2015/11/5
Professor Dong Lai，Department of Astronomy at Cornell University,After undergraduate study at the University of Science and Technologyof China, Dong Lai came to the US for graduate study, receivingPh....
The model of self-generated seismo-electromagnetic oscillations of the LAI system
self-generated seismo-electromagnetic oscillations LAI system
2014/12/31
Very low frequency (VLF) electromagnetic radiation (in diapason 1 kHz–1 MHz) in the atmosphere, generated during an earthquake preparation period, may be connected with the linear size characterising ...
Modelling LAI at a regional scale with ISBA-A-gs:comparison with satellite-derived LAI over southwestern France
LAI regional scale ISBA-A-gs satellite-derived LAI southwestern France
2010/1/20
A CO2-responsive land surface model (the ISBA-A-gs model of Météo-France) is used to simulate photosynthesis and Leaf Area Index (LAI) in southwestern France for a 3-year period (2001–2003). A domain ...
摘要 20世纪80年代以来东亚飞蝗在我国再度猖獗危害，及时、准确地监测东亚飞蝗的危害状况，对于东亚飞蝗的有效防治有重要意义。以河北省黄骅市为研究区，从光学模型的建立机理为着眼点，定量分析和对比了4种由植被冠层孔隙度反演LAI的算法。结果表明，LAI与植被指数之间呈明显的正相关关系，即随着LAI的增大，植被指数也在增大；在4种估算方法中，LAI-2000算法最适用于研究区植被LAI的估算。此外，还分...
摘要 免疫进化算法（IEA）是基于遗传算法（GA）的一种“加强局部搜索，兼顾全局搜索”的进化算法。利用免疫进化算法（IEA）对鹤望兰叶面积指数（LAI）进行模拟，平均相对误差为3.44%，取得满意的结果，对鹤望兰栽培管理有一定的实际意义。免疫进化算法用于鹤望兰叶面积指数模拟简便、易行，为鹤望兰叶面积指数模拟模型的建立及参数优化开辟了一条新途径。
利用不同分辨率卫星影像的NDVI数据估算叶面积指数(LAI) ——以岷江上游为例
叶面积指数 岷江上游 归一化植被指数
2007/12/10
摘要 短周期的低分辨率遥感数据为大面积估算LAI及季节动态和物候趋势提供了有利工具，但基于高分辨率LAI的遥感估算模型在低分辨率遥感数据上应用有很大的不确定性。研究利用LAI-2000冠层分析仪与跟踪辐射和冠层结构测量仪(TRAC)，测定了岷江上游流域范围内490块野外调查样地（50m×50m样方）的LAI数据，结合同期较高精度卫星数据（TM）建立了不同植被类型的LAI-NDVI算法，在经过传感器...