搜索结果: 76-90 共查到“知识库 物理大地测量学”相关记录112条 . 查询时间(2.352 秒)
RAPID RESPONSE TOOLS AND DATASETS FOR POST-FIRE MODELING: LINKING EARTH OBSERVATIONS AND PROCESS-BASED HYDROLOGICAL MODELS TO SUPPORT POST-FIRE REMEDIATION
Forestry, Hydrology Hazards Forest fire
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2015/5/6
Preparation is key to utilizing Earth Observations and process-based models to support post-wildfire mitigation. Post-fire flooding and erosion can pose a serious threat to life, property and munici...
AUTOMATIC MAPPING OF GLACIER BASED ON SAR IMAGERY BY BENEFITS OF FREELY OPTICAL AND THERMAL DATA
Glacier Surface Area SAR Optical data Thermal data
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2015/4/1
For many research applications like water resources evaluation, determination of glacier specific changes, and for calculation of the past and future contribution of glaciers to sea-level change, para...
PREPROCESSING OF SATELLITE DATA FOR URBAN OBJECT EXTRACTION
Optical Satellite Data Stereo processing DSM extraction Spectral classification Urban object detection
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2015/4/1
Very high resolution (VHR) DSMs (digital surface models) derived from stereo- or multi-stereo images from current VHR satellites like WorldView-2 or Pléiades can be produced up to the ground sampling ...
IMPROVING LINEAR SPECTRAL UNMIXING THROUGH LOCAL ENDMEMBER DETECTION
Hyperspectral Data Set Local Linear Spectral Unmixing (LLSU) Maximum Likelihood Classification (MLC)
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2015/4/1
There are a considerable number of mixed pixels in remotely sensed images. Different sub-pixel analyses have been recently developed correspondingly. A well-known method is linear spectral unmixing wh...
A PHYSICS-BASED MODEL FOR ACTIVE CONTOURS: A COMPUTATIONAL ALGEBRAIC TOPOLOGY APPROACH
A PHYSICS-BASED MODEL ACTIVE CONTOURS A COMPUTATIONAL ALGEBRAIC TOPOLOGY APPROACH
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2015/3/16
A PHYSICS-BASED MODEL FOR ACTIVE CONTOURS: A COMPUTATIONAL ALGEBRAIC TOPOLOGY APPROACH.
Target detection algorithm for airborne thermal hyperspectral data
Thermal Hyperspectral LWIR (Long Wave Infrared) Constrained Energy Minimization (CEM) Minimum Noise Fraction (MNF)
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2014/12/15
Airborne hyperspectral imaging is constantly being used for classification purpose. But airborne thermal hyperspectral image usually is a challenge for conventional classification approaches. The Telo...
Estimation of aerosol optical depth over Dehradun (India) using simple model for atmospheric radiative transfer in multiple scattering approximation
SMART multiple scattering approximation AWiFS aerosol optical depth
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2014/12/15
Aerosol optical depth retrieval over land surface using remote sensing employs the use of radiative transfer simulations and/or simultaneous measurements of atmospheric parameters at the time of satel...
Operational Retrieval of aerosol optical depth over Indian subcontinent and Indian Ocean using INSAT-3D/Imager product validation
Aerosols geostationary satellite optical depth INSAT 3D MODIS
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2014/12/15
Aerosol optical depth (AOD) over Indian subcontinent and Indian Ocean region is derived operationally for the first time from the geostationary earth orbit (GEO) satellite INSAT-3D Imager data at 0.65...
Spectral stratigraphy and clay minerals analysis in parts of Hellas Planitia, Mars
Spectral analysis Hellas Planitia Clay minerals MRO-CRISM Compositional stratigraphy
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2014/12/15
Absorption features that occur in reflectance spectra are a sensitive indicator of mineralogy and chemical composition for a wide variety of materials. The investigation of the mineralogy and chemical...
Hyperspectral analysis of clay minerals
Clay minerals X Ray Diffraction Hyperspectral DISPEC Spectral Angle Mapper
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2014/12/15
A study was carried out by collecting soil samples from parts of Gwalior and Shivpuri district, Madhya Pradesh in order to assess the dominant clay mineral of these soils using hyperspectral data, as ...
Mineralogical characterization of Juventae Chasma, Mars: evidences from MRO-CRISM
Juventae Chasma Hydrous Sulphates Mafic minerals Carbonates Light Toned Layered Deposits CRISM
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2014/12/15
Juventae Chasma is a long depression associated with Valles Marineris and this study discusses the spectral observation made after analysing the Mars Reconnaissance Orbiter (MRO) Compact Reconnaissanc...
利用卫星激光测距技术研究全球垂直地壳运动的参考基准
地壳运动 垂直基准 卫星激光测距（SLR） 国际地球参考框架（ITRF） 系统差模型
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2014/4/9
当前地震、地质灾害等现象的频繁发生，表明对于地壳运动尤其是垂直方向的研究是迫切而必需的，而研究垂直地壳运动的一个重要前提就是其参考基准的确立。针对目前国内外对于全球垂直地壳运动参考基准不统一的现状，分析了研究全球统一的垂直地壳运动参考基准的必要性，提出将ITRF2008框架下获取的SLR的垂向速度场作为全球垂直地壳运动参考基准的方案，论证了该方案的合理性，并利用GPS和VLBI的观测数据，求取了其...
多指标融合的小波去噪最佳分解尺度选择方法1
小波分析 小波去噪 最佳分解尺度 测量数据处理
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2012/12/25
借助最小均方根误差、信噪比及光滑度变化随小波分解尺度增加的收敛特性，提出了一种多指标融合的小波去噪最佳分解尺度选择方法。该方法利用信息熵来融合小波去噪过程中不同方面的变化特征，能够更全面地反映小波去噪结果与分解尺度间的对应关系；通过定量识别融合指标变化的拐点，能够有效识别小波去噪的最佳分解尺度。针对不同类型的去噪信号进行实验分析并与现有方法进行比较，验证了本文提出方法的有效性与优越性。
TM/ETM+影像大气校正产品质量评价方法研究
大气校正 质量评价 精度验证 Landsat TM/ETM+ 全球土地调查
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2012/12/25
对TM/ETM+的大气校正产品质量进行评价是改进产品影像质量的必要手段。本文提出了采用已有高质量TM/ETM+表面反射率产品作为参考影像评价TM/ETM+的大气校正产品质量的方法。该方法设计了面向产品质量评价的影像光谱采样方案和多时相遥感影像PIFs（Pseudo Invariant Features, PIFs）样本自动识别方法，能对多时相/季相TM/ETM+大气校正产品质量进行评价。实验表明该...
顾及地形与完全球面布格异常梯度项改正的区域似大地水准面精化
似大地水准面 地形改正 完全球面布格异常梯度 奇异积分 高程异常
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2012/12/25
本文推证了顾及地形与完全球面布格异常梯度改正的完全到一阶项的物理大地测量边值问题的严密解式，并在某实验区综合利用地形、重力、GPS/水准等数据进行了区域似大地水准面的计算与检验。通过对高程异常计算绝对与相对精度的比较分析，结果表明，完全球面布格异常梯度改正项对高程异常的影响能够达到厘米的量级。因此，为提高区域似大地水准面的建模精度，尤其是在地形起伏较大的区域，除需顾及地形改正项影响外，还应考虑完全...