按文献类别分组
按栏目分组
关键词
无人机航空摄影测量在地形图测绘中的应用探讨
作者: 陈建丰   来源: 内蒙古煤炭经济 年份: 2019 文献类型 : 期刊 关键词: 无人机航空摄影测量   地形图测绘   应用  
描述: 地形图测绘是基础地理信息采集工作中非常重要的一个环节,从实际工作来看,在地形图测绘过程中,可能面临测量难等问题,因此便需要注重先进、科学的测量技术在其中的应用。本课题重点研讨了无人机航空摄影测量在地形图测绘中的应用,以期为地形图测绘工作质量的提高提供一些具有价值的参考建议。
无人机航空摄影测量在带状地形图测量中的应用
作者: 李佃锋   来源: 信息记录材料 年份: 2020 文献类型 : 期刊 关键词: 无人机航空摄影测量   带状地形图测量   实际应用  
描述: 无人机航空摄影测量在带状地形图测量中的应用
无人机航空摄影测量在地形图测绘中的应用探讨
作者: 陈建丰   来源: 内蒙古煤炭经济 年份: 2019 文献类型 : 期刊 关键词: 无人机航空摄影测量   地形图测绘   应用  
描述: 地形图测绘是基础地理信息采集工作中非常重要的一个环节,从实际工作来看,在地形图测绘过程中,可能面临测量难等问题,因此便需要注重先进、科学的测量技术在其中的应用。本课题重点研讨了无人机航空摄影测量在地形图测绘中的应用,以期为地形图测绘工作质量的提高提供一些具有价值的参考建议。
无人机航空摄影测量在带状地形图测量中的应用
作者: 李佃锋   来源: 信息记录材料 年份: 2020 文献类型 : 期刊 关键词: 无人机航空摄影测量   带状地形图测量   实际应用  
描述: 无人机航空摄影测量在带状地形图测量中的应用
浅谈无人机航空摄影测量在长输管道工程中的作业方法
作者: 廉波   来源: 中国石油石化 年份: 2017 文献类型 : 期刊 关键词: 无人机航空摄影测量   调绘   空三加密   像控点  
描述: 的快速正射影像图和专题图制作等诸多领域。本文对无人机航空摄影测量在长距离输油输气管道工程中的作业方法做了具体阐述。
无人机航空摄影测量在地形图测绘中的应用探讨
作者: 陈建丰   来源: 内蒙古煤炭经济 年份: 2017 文献类型 : 期刊 关键词: 无人机航空摄影测量   地形图测绘   应用  
描述: 地形图测绘是基础地理信息采集工作中非常重要的一个环节,从实际工作来看,在地形图测绘过程中,可能面临测量难等问题,因此便需要注重先进、科学的测量技术在其中的应用。本课题重点研讨了无人机航空摄影测量在地形图测绘中的应用,以期为地形图测绘工作质量的提高提供一些具有价值的参考建议。
Towards a high-resolution modelling scheme for local-scale urban flood risk assessment based on digital aerial photogrammetry
作者: Jiang   Changbo     Kang   Yuantai     Qu   Ke     Long   Yuannan     Ma   Yuan     Yan   Shixiong   来源: Engineering Applications of Computational Fluid Mechanics 年份: 2023 文献类型 : 期刊 关键词: hydrography   Urban   assessment   fluvial   risk   UAV   flood  
描述: he flood process of the 10-year with the actual flood in 2016 indicates that the extent of inundation
Towards a high-resolution modelling scheme for local-scale urban flood risk assessment based on digital aerial photogrammetry
作者: Jiang   Changbo     Kang   Yuantai     Qu   Ke     Long   Yuannan     Ma   Yuan     Yan   Shixiong   来源: Engineering Applications of Computational Fluid Mechanics 年份: 2023 文献类型 : 期刊 关键词: hydrography   Urban   assessment   fluvial   risk   UAV   flood  
描述: he flood process of the 10-year with the actual flood in 2016 indicates that the extent of inundation
A three‐dimensional wideband mmWave multiple‐input multiple‐output channel model for aerial reconfigurable intelligent surface‐assisted communication systems
作者: Xiaona   Wu     Ji   Bian     Zili   Wang     Xiangwei   Zheng     Jie   Tian     Jingping   Qiao   来源: International Journal of Communication Systems 年份: 2023 文献类型 : 期刊 关键词: reconfigurable   statistical   GBSM   channel   MIMO   model   UAV   intelligent   properties   Surface  
描述: This paper presents a wideband millimeter wave (mmWave) channel model for aerial reconfigurable intelligent surface (ARIS) communications, in which the reconfigurable intelligent surface (RIS) is attached to an unmanned aerial vehicle (UAV) to enable intelligent signal reflections in the air. The model is established according to standard 3GPP channel models and considers important propagation factors, for example, large‐scale fading, small‐scale fading, and radiation pattern of reflection units (RUs). In addition, the model assumes three‐dimensional (3D) rotations of RIS and can capture its effects on channel characteristics. Based on the model, we propose a design method for RIS reflection phases. Statistics including channel amplitude, spatial, temporal, and frequency correlation functions (CFs), and space‐Doppler power spectral density (SD‐PSD) are obtained. The impacts of RU number, UAV height and speed, and RIS rotation on channel statistics are investigated. Results suggest that the designed reflection phases can effectively mitigate multipath fading and Doppler effect. Compared to the yaw angle of the UAV platform, channel characteristics are more sensitive to the roll and pitch angles.
A three‐dimensional wideband mmWave multiple‐input multiple‐output channel model for aerial reconfigurable intelligent surface‐assisted communication systems
作者: Xiaona   Wu     Ji   Bian     Zili   Wang     Xiangwei   Zheng     Jie   Tian     Jingping   Qiao   来源: International Journal of Communication Systems 年份: 2023 文献类型 : 期刊 关键词: reconfigurable   statistical   GBSM   channel   MIMO   model   UAV   intelligent   properties   Surface  
描述: This paper presents a wideband millimeter wave (mmWave) channel model for aerial reconfigurable intelligent surface (ARIS) communications, in which the reconfigurable intelligent surface (RIS) is attached to an unmanned aerial vehicle (UAV) to enable intelligent signal reflections in the air. The model is established according to standard 3GPP channel models and considers important propagation factors, for example, large‐scale fading, small‐scale fading, and radiation pattern of reflection units (RUs). In addition, the model assumes three‐dimensional (3D) rotations of RIS and can capture its effects on channel characteristics. Based on the model, we propose a design method for RIS reflection phases. Statistics including channel amplitude, spatial, temporal, and frequency correlation functions (CFs), and space‐Doppler power spectral density (SD‐PSD) are obtained. The impacts of RU number, UAV height and speed, and RIS rotation on channel statistics are investigated. Results suggest that the designed reflection phases can effectively mitigate multipath fading and Doppler effect. Compared to the yaw angle of the UAV platform, channel characteristics are more sensitive to the roll and pitch angles.
< 1 2 3
Rss订阅