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).

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。

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.

Life‐cycle analysis of sustainable aviation fuel production through catalytic hydrothermolysis

作者： Peter   Hua   Chen     Uisung   Lee     Xinyu   Liu     Hao   Cai     Michael   Wang   来源： Biofuels, Bioproducts and Biorefining 年份： 2023 文献类型 ： 期刊 关键词： grease   assessment   Aviation   biofuel   Fuel   SAF   catalytic   Sustainable   brown   cycle   life   hydrothermolysis  

描述： , SAF production through CH requires a quantitative assessment of carbon intensity (CI) impacts. In

Life‐cycle analysis of sustainable aviation fuel production through catalytic hydrothermolysis

作者： Peter   Hua   Chen     Uisung   Lee     Xinyu   Liu     Hao   Cai     Michael   Wang   来源： Biofuels, Bioproducts and Biorefining 年份： 2023 文献类型 ： 期刊 关键词： grease   assessment   Aviation   biofuel   Fuel   SAF   catalytic   Sustainable   brown   cycle   life   hydrothermolysis  

描述： , SAF production through CH requires a quantitative assessment of carbon intensity (CI) impacts. In

Determining possibilities for applying theoretical principles of situational risk management in the aviation safety system

作者： Dmytro   Bugayko     Oleksandr   Ponomarenko     Nataliya   Sokolova     Oleg   Leshchinsky   来源： Eastern-European Journal of Enterprise Technologies 年份： 2023 文献类型 ： 期刊 关键词： area   acceptable   Aviation   methods   predictive   language   proactive   technology   Management   structure   drama   reactive   safety   of   situational   risk   factor   nuclear   human   frame  

描述： management object based on the method of expert assessments, the weighting coefficients of the risk

Determining possibilities for applying theoretical principles of situational risk management in the aviation safety system

作者： Dmytro   Bugayko     Oleksandr   Ponomarenko     Nataliya   Sokolova     Oleg   Leshchinsky   来源： Eastern-European Journal of Enterprise Technologies 年份： 2023 文献类型 ： 期刊 关键词： area   acceptable   Aviation   methods   predictive   language   proactive   technology   Management   structure   drama   reactive   safety   of   situational   risk   factor   nuclear   human   frame  

描述： management object based on the method of expert assessments, the weighting coefficients of the risk