无人机航空摄影测量在矿山动态监测中的应用

作者： 吴松   来源： 能源与节能 年份： 2023 文献类型 ： 期刊 关键词： 无人机航空摄影测量   动态监测   矿山储量监测  

描述： 由于遥感影像采集的复杂性，对矿山监控资料的采集周期大大延长。而无人机航拍测量技术具有机动灵活、测量效率高、测量品质高等优点，将它用于矿山监测和采矿监控，可解决以往常规方法所带来的缺陷，从而降低劳动强度，减少劳动量，提高矿山的现场勘测和采矿监控的工作效能。通过建立无人机航摄控制系统，设置无人机航测矿山监测点，动态监控矿山储量，采用无人机航摄技术进行矿山储量监测。建立了一个实验模型，与常规的测试结果进行了比较，结果表明，该方法在实际应用中的有效性要好于常规方法。从这一点可以看出，这种方式更适用于矿山的动态监控工作。

无人机航空摄影测量在矿山动态监测中的应用

作者： 吴松   来源： 能源与节能 年份： 2023 文献类型 ： 期刊 关键词： 无人机航空摄影测量   动态监测   矿山储量监测  

描述： 由于遥感影像采集的复杂性，对矿山监控资料的采集周期大大延长。而无人机航拍测量技术具有机动灵活、测量效率高、测量品质高等优点，将它用于矿山监测和采矿监控，可解决以往常规方法所带来的缺陷，从而降低劳动强度，减少劳动量，提高矿山的现场勘测和采矿监控的工作效能。通过建立无人机航摄控制系统，设置无人机航测矿山监测点，动态监控矿山储量，采用无人机航摄技术进行矿山储量监测。建立了一个实验模型，与常规的测试结果进行了比较，结果表明，该方法在实际应用中的有效性要好于常规方法。从这一点可以看出，这种方式更适用于矿山的动态监控工作。

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.