关键词
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: This approach provides technical guidance for flood risk assessment in areas where data is lacking (e.g., upstream mountainous cities).
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: This approach provides technical guidance for flood risk assessment in areas where data is lacking (e.g., upstream mountainous cities).
航空发动机状态评估系统开发
作者: 于文武   许春生   康力平   来源: 第七届全国交通运输领域青年学术会议 年份: 2016 文献类型 : 会议论文 关键词: assessment   engine  AHP  weight  condition   Aero  
描述: 航空发动机状态的好坏直接关系到飞行的安全,利用层次分析法,通过对国航发动机机群的监控数据进行插值计算,得到各个分权值,再对分权值进行处理得到综合权值,根据综合权值的大小并按发动机型号进行排队,开发出了一种新的航空发动机状态评估系统.
航空发动机状态评估系统开发
作者: 于文武   许春生   康力平   来源: 第七届全国交通运输领域青年学术会议 年份: 2016 文献类型 : 会议论文 关键词: assessment   engine  AHP  weight  condition   Aero  
描述: 航空发动机状态的好坏直接关系到飞行的安全,利用层次分析法,通过对国航发动机机群的监控数据进行插值计算,得到各个分权值,再对分权值进行处理得到综合权值,根据综合权值的大小并按发动机型号进行排队,开发出了一种新的航空发动机状态评估系统.
无人机航空摄影测量系统在农村土地确权中的应用
作者: 刘丰   来源: 测绘与空间地理信息 年份: 2024 文献类型 : 期刊 关键词: PPSG   农村土地确权   无人机航空摄影测量   UAV  
描述: 随着无人机技术的日益完善,其在各个领域的应用也愈发广泛。针对在农村土地承包经营权确权工作中如何利用无人机摄影测量系统获取直观准确的影像资料,进行了调查和研究。结果表明,无人机航空摄影技术在此领域具有极大的应用潜力,能够显著提高确权工作的精度和质量。
无人机航空摄影测量系统在农村土地确权中的应用
作者: 刘丰   来源: 测绘与空间地理信息 年份: 2024 文献类型 : 期刊 关键词: PPSG   农村土地确权   无人机航空摄影测量   UAV  
描述: 随着无人机技术的日益完善,其在各个领域的应用也愈发广泛。针对在农村土地承包经营权确权工作中如何利用无人机摄影测量系统获取直观准确的影像资料,进行了调查和研究。结果表明,无人机航空摄影技术在此领域具有极大的应用潜力,能够显著提高确权工作的精度和质量。
新型垂直起降双旋翼无人飞行器设计与实现
作者: 陈文贵   来源: 佛山科学技术学院 年份: 2018 文献类型 : 学位论文 关键词: VTOL   飞行器   无人机   控制器   双旋翼   PID   混合模式   UAV   垂直起降  
描述: 新型垂直起降双旋翼无人飞行器设计与实现
新型垂直起降双旋翼无人飞行器设计与实现
作者: 陈文贵   来源: 佛山科学技术学院 年份: 2018 文献类型 : 学位论文 关键词: VTOL   飞行器   无人机   控制器   双旋翼   PID   混合模式   UAV   垂直起降  
描述: 新型垂直起降双旋翼无人飞行器设计与实现
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.
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