搜索结果: 76-90 共查到“知识库 航天器结构与设计”相关记录1227条 . 查询时间(5.749 秒)
EXTRACTION OF BLUE ICE AREA USING ALBEDO VALUE DERIVED FROM LANDSAT-8 SATELLITE DATA
Blue Ice Landsat-8 Albedo Polar record Glacier Image Processing
2019/2/28
Blue Ice Areas (BIAs) or bare ice areas are zones of glacier where surface mass balance is negative, sublimation forms the major ablation process and surface albedo is relatively small. Exceptionally ...
MULTI-SATELLITE OBSERVATION OF MEGH CYCLONE
Cyclone Megh RISAT-1 Synthetic aperture radar cloud microphysics Wind speed
2019/2/28
Cyclone Megh, a category-3 (Saffir-Simpson scale) cyclonic storm is regarded as the worst tropical cyclone to ever strike Yemen’s island of Socotra. In this paper, we aim to investigate the wind struc...
BUILDING FOOTPRINT EXTRACTION FROM HIGH RESOLUTION SATELLITE IMAGERY USING SEGMENTATION
Segmentation Building Extraction Multi-Resolution Algorithm Rule-Based Feature Extraction High Resolution Satellite Imagery
2019/2/27
Identification and mapping of urban features such as buildings and roads are an important task for cartographers and urban planners. High resolution satellite imagery supports the efficient extraction...
A WEB-BASED VIRTUAL LABORATORY FOR SATELLITE IMAGE PROCESSING AND ANALYSIS
Education Satellite Image Processing E-Learning Tool Web-based Virtual Laboratory
2019/2/27
With continuous increase in the utilization of satellite images in various engineering and science fields, it is imperative to equip students with additional educational aid in subject of satellite im...
ROAD NETWORK IDENTIFICATION AND EXTRACTION IN SATELLITE IMAGERY USING OTSU'S METHOD AND CONNECTED COMPONENT ANALYSIS
Road identification road extraction Otsu's method connected component analysis morphological operations
2019/2/27
As the high resolution satellite images have become easily available, this has motivated researchers for searching advanced methods for object detection and extraction from satellite images. Roads are...
奇异摄动被广泛应用于求取力学问题的近似解.一个典型问题就是流体力学中的边界层.郭永怀先生曾发展了适用于平板黏性流动边界层问题的奇异摄动理论.类似于流体力学中的边界层,燃烧研究中的层流预混火焰也可以通过奇异摄动理论进行分析,在燃烧研究中通常称其为大活化能渐近分析.本文介绍了大活化能渐近分析在一维平面预混火焰和球形传播火焰中的应用及相关研究进展.首先介绍了预混火焰结构及其涉及的不同特征尺度,分析了大活...
EXTRACTION OF BUILT-UP AREA USING HIGH RESOLUTION SENTINEL-2A AND GOOGLE SATELLITE IMAGERY
Built-up area Extraction Normalized Difference Index High Resolution Satellite Imagery Sentinel-2A Google Satellite Imagery
2018/11/9
Accurate information about the built-up area in a city or town is essential for urban planners for proper planning of urban infrastructure facilities and other basic amenities. The normalized differen...
ASSESSMENT OF SEASONAL VARIABILITY FOR WIND SPEED AND SIGNIFICANT WAVE HEIGHT USING SATELLITE ALTIMETER OVER MALAYSIAN SEAS
Wind speed significant wave height Seasonal variations Satellite Altimeter Radar Altimeter Database System Monsoons
2018/11/9
Malaysia is located in the equatorial region and experienced climate hot, humid and rainy throughout the year. These have brought four monsoon seasons to Malaysia which can be categorised as Northeast...
以主动雷达弹对抗为背景，研究了单平台机载电子对抗资源的调度问题。为解决导弹导引头状态观测不确定性问题，引入部分可观测马尔科夫决策过程（POMDP）理论，分析了POMDP模型的要素，建立了针对主动雷达制导导弹的干扰资源优化POMDP模型，并利用最优策略可达空间的连续近似法（SARSOP）进行求解。将电子支援措施（ESM）的观测值输出与电子干扰措施（ECM）的优化策略相结合，提出了一种基于POMDP的...
MAPPING SPATIOTEMPORAL DISTRIBUTION OF MANGROVES IN MAFIA ISLAND IN TANZANIA USING LANDSAT IMAGERY
Mapping Mangroves Satellite Image Landsat Mafia Island
2018/11/8
Mangroves are important for survival of coastal communities as they provide ecosystem services that support coastal population and their livelihoods. Most coastal communities largely depend on ecosyst...
一种卫星推进分系统热控的优化设计方法
卫星推进分系统 热控 优化设计 分舱操作
2018/5/4
根据传统卫星推进分系统热控要求，针对推进舱内肼管路及部件进行加热带缠绕和多层隔热组件包覆的问题，提出了一种基于新型推进剂条件下的推进分系统热控优化设计，即取消推进舱内热控处理措施，而是在推进舱的外侧板包覆多层隔热组件，并采用电磁阀补偿加热.对采用优化设计的推进分系统热控设计进行了热平衡试验和在轨验证.结果表明，推进分系统的温度水平和功耗要求均满足目前中国对于卫星的热控要求，且优化设计使推进分系统热...
IMAGE QUALITY ASSESSMENT OF HIGH-RESOLUTION SATELLITE IMAGES WITH MTF-BASED FUZZY COMPREHENSIVE EVALUATION METHOD
Image Quality Assessment High-resolution Satellite Images MTF Fuzzy Comprehensive Evaluation
2018/5/15
A Modulation Transfer Function (MTF)-based fuzzy comprehensive evaluation method was proposed in this paper for the purpose of evaluating high-resolution satellite image quality. To establish the fact...
MAPPING GLOBAL OCEAN SURFACE ALBEDO FROM SATELLITE OBSERVATIONS: MODELS, ALGORITHMS, AND DATASETS
Albedo Ocean BRDF Remote sensing Radiative transfer Surface radiation budget
2018/5/14
Ocean surface albedo (OSA) is one of the important parameters in surface radiation budget (SRB). It is usually considered as a controlling factor of the heat exchange among the atmosphere and ocean. T...
AN INTERFEROMETRIC PROCESSING METHOD TO MAINTAIN BOTH ACCURACY AND RESOLUTION OF DEM USING GAOFEN-3 SAR DATA
Gaofen-3, TanDEM-X, DEM, multi-look
2018/5/14
Gaofen-3 (GF-3) is the only in-orbit SAR satellite of China civilian fields. It is designed especially for ocean observation but not for interferometric applications. However, during the past one and ...
DISCUSSION ON HEIGHT SYSTEMS IN STEREOSCOPIC MAPPING USING THE ZY-3 SATELLITE IMAGES
ZY-3 Stereoscopic Satellite Mapping Geoid Ellipsoidal height Orthometric height Accuracy
2018/5/16
The ZY-3 is the civil high-resolution optical stereoscopic mapping satellite independently developed by China. It is mainly used for 1 : 50,000 scale topographic mapping. One of the distin...