For Unmanned Aerial Vehicles(UAV),the intelligent video analysis is a key technology in intelligent autonomous control,real-time navigation and surveillance.However,poor UAV wireless links would degrade the quality of...For Unmanned Aerial Vehicles(UAV),the intelligent video analysis is a key technology in intelligent autonomous control,real-time navigation and surveillance.However,poor UAV wireless links would degrade the quality of video communication,leading to difficulties in video analysis.To meet the challenges of packet-loss and limited bandwidth in adverse UAV channel environments,this paper proposes a parameter optimization mechanism for UAV intelligent video analysis.In the proposed method,an Optimal Strategy Library(OSL)is designed to optimize the parameters for video encoding and forward error correction.Adapted to the packet-loss rate and bandwidth in practical UAV wireless network,the proposed OSL can facilitate the encoding of video sequences and the recovery of degraded videos with optimal performance.Experimental results demonstrate that the proposed solution can keep intelligent video analysis working efficiently with adverse UAV wireless links,and is capable of maximizing the inference accuracy of Multi-Object Tracking(MOT)algorithms in various scenarios.展开更多
A novel copper selective sensor 2 based on hydrazide and salicylaldehyde has been designed and prepared. Sensor 2 behaves a single selectivity and sensitivity in the recognition for Cu2＋ over other metal ions such as...A novel copper selective sensor 2 based on hydrazide and salicylaldehyde has been designed and prepared. Sensor 2 behaves a single selectivity and sensitivity in the recognition for Cu2＋ over other metal ions such as Fe3＋, Hg2＋, Ag＋, Ca2＋, Zn2＋, Pb2＋, Cd2＋, Ni2＋, Co2＋, Cr3＋ and Mg2＋ in DMSO. The distinct color change and the rapid changement of fluorescence emission provide naked-eyes detection for Cu2＋. The UV-vis data indicate that 1 ： 2 stoichiometry complex is formed by sensor 2 and Cu2＋. The association constant Ks was 3.51 × 104 mol 1%. The detection limitation of Cu2＋ with the sensor 2 was 2.2 × 10.7 mol·L^-1. The sensing of Cu2＋ by this sensor was found to be reversible, with the Cu2＋-induced color being lost upon addition of EDTA.展开更多
文摘For Unmanned Aerial Vehicles(UAV),the intelligent video analysis is a key technology in intelligent autonomous control,real-time navigation and surveillance.However,poor UAV wireless links would degrade the quality of video communication,leading to difficulties in video analysis.To meet the challenges of packet-loss and limited bandwidth in adverse UAV channel environments,this paper proposes a parameter optimization mechanism for UAV intelligent video analysis.In the proposed method,an Optimal Strategy Library(OSL)is designed to optimize the parameters for video encoding and forward error correction.Adapted to the packet-loss rate and bandwidth in practical UAV wireless network,the proposed OSL can facilitate the encoding of video sequences and the recovery of degraded videos with optimal performance.Experimental results demonstrate that the proposed solution can keep intelligent video analysis working efficiently with adverse UAV wireless links,and is capable of maximizing the inference accuracy of Multi-Object Tracking(MOT)algorithms in various scenarios.
基金the National Natural Science Foundation of China (NSFC)，the Natural Science Foundation of Gansu Province，the Program for Changjian Scholars and Innovative Research Team in University of Minisry of Education of China
文摘A novel copper selective sensor 2 based on hydrazide and salicylaldehyde has been designed and prepared. Sensor 2 behaves a single selectivity and sensitivity in the recognition for Cu2＋ over other metal ions such as Fe3＋, Hg2＋, Ag＋, Ca2＋, Zn2＋, Pb2＋, Cd2＋, Ni2＋, Co2＋, Cr3＋ and Mg2＋ in DMSO. The distinct color change and the rapid changement of fluorescence emission provide naked-eyes detection for Cu2＋. The UV-vis data indicate that 1 ： 2 stoichiometry complex is formed by sensor 2 and Cu2＋. The association constant Ks was 3.51 × 104 mol 1%. The detection limitation of Cu2＋ with the sensor 2 was 2.2 × 10.7 mol·L^-1. The sensing of Cu2＋ by this sensor was found to be reversible, with the Cu2＋-induced color being lost upon addition of EDTA.
