工学 >>> 航空、航天科学技术 >>> 航天器结构与设计 >>> 火箭、导弹 人造地球卫星 空间探测器 宇宙飞船 航天站 航天飞机 航天器结构与设计其他学科
搜索结果: 106-120 共查到知识库 航天器结构与设计相关记录1226条 . 查询时间(2.281 秒)
NO2 is an important trace gas in both the stratosphere and troposphere. Since January 2007, the nadir-looking GOME-2 satellite instrument has been providing NO2 data on a global scale which is of grea...
Remote sensing optical image cloud detection is one of the most important problems in remote sensing data processing. Aiming at the information loss caused by cloud cover, a cloud detection method bas...
Due to the improvement of satellite radiometric resolution and the color difference for multi-temporal satellite remote sensing images and the large amount of satellite image data, how to complete the...
The high-resolution remote-sensing satellite, GF4 PMS, of China's geosynchronous earth orbit was successfully launched on December 29, 2015. Its high spatial resolution and high temporal resolution al...
WorldView-3, as a high-resolution commercial earth observation satellite, which is launched by Digital Global, provides panchromatic imagery of 0.31 m resolution. The positioning accuracy is les...
The new generation geostationary meteorological satellite, Himawari-8 (H-8), was launched in 2015. Its main payload, the Advanced Himawari Imager (AHI), can observe the earth with 10-minute interval a...
A three-dimensional variational data assimilation scheme is designed for satellite AOD based on the IMPROVE (Interagency Monitoring of Protected Visual Environments) equation. The observation operator...
There are many shadows on the high spatial resolution satellite images, especially in the urban areas. Although shadows on imagery severely affect the information extraction of land cover or land use,...
China has paid considerable attention to space exploration and made great strides in the field. The first Chinese Mars Exploration Mission will be carried out in 2020. Digital simulation has been prov...
The classification problem in the image processing field is an important challenge, so that in the process image pixels are separated into previously determined classes according to their features. Th...
The classification problem in the image processing field is an important challenge, so that in the process image pixels are separated into previously determined classes according to their features. Th...
In recent years, especially in metropolitan cities such as Istanbul, the emerging needs of the increasing population and demand for better air transportation capacity have led to big environmental cha...
鉴于卡尔曼滤波器(KF)具有优良的信号估计性能,将KF与贪婪算法相结合,该文给出稀疏约束下的基于KF的空间目标逆合成孔径雷达(ISAR)成像方法。考虑到有些空间目标尺寸较大或包含大尺寸部件,或成像积累时间较长,会引入越分辨单元走动(MTRC)和方位向2次相位调制,首先对回波进行MTRC校正,然后构建包含2次相位的观测矩阵,通过使图像锐度最大化,估计目标转动角速度,获得聚焦目标图像,并将估计转速用于...
由于视距限制,对海上移动目标进行连续观测与定位探测难度较大.现有方法通过卫星和无人机等单平台对目标进行观测,不能解决面向海上移动目标连续观测的问题.针对当前单个平台的不足,本文构建了面向海上移动目标的空天协同连续观测模型,并提出了空天协同连续观测策略.空天协同连续观测策略抽取出卫星规划、无人机飞行计划、观测序列、区域预测以及路径规划等五个子问题,并对其进行建模求解.仿真实验表明,该方法大大降低了目...
现代作战条件下反坦克导弹武器系统的作战效能评估是该类武器装备作战使用的关键,传统的评估方法主要针对该系统中某一作战分系统的效能开展研究,不能充分反映武器系统作战能力的真实性和全面性.基于此,本文针对反坦克导弹武器系统的作战效能的评估方法进行研究首先构建反坦克导弹武器效能评估指标体系,包括了指标集与评估集,并根据不同专家的意见和建议优化该指标体系;然后结合组合赋权的思想,将熵权算法与分层赋权算法所得...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...