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航空飞播种植研究
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作者 高艳霞 《农业与技术》 2018年第15期85-86,共2页
航空飞播造林是加快我国造林绿化的重要途径之一,也是防止林区沙漠化的重要举措,是目前我国造林的主要方式之一。航空飞播种植技术在我国已经有50多年的历史,利用航空飞播种植技术开展飞播造林,不仅能够产生良好的经济效益和社会效益,... 航空飞播造林是加快我国造林绿化的重要途径之一,也是防止林区沙漠化的重要举措,是目前我国造林的主要方式之一。航空飞播种植技术在我国已经有50多年的历史,利用航空飞播种植技术开展飞播造林,不仅能够产生良好的经济效益和社会效益,而且还能够凸显生态效益。本文主要结合实际情况,航空飞播造林技术进行分析,然后论述了开展航空飞播造林保障措施,希望通过本次研究对进一步加快本地区森林面积恢复,强化生态保护有一定帮助。 展开更多
关键词 航空飞播 造林技术 种植研究
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ADS-B Anomaly Data Detection Model Based on Deep Learning and Difference of Gaussian Approach 被引量:6
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作者 WANG Ershen SONG Yuanshang +5 位作者 XU Song GUO Jing HONG Chen QU Pingping PANG Tao ZHANG Jiantong 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第4期550-561,共12页
Due to the influence of terrain structure,meteorological conditions and various factors,there are anomalous data in automatic dependent surveillance-broadcast(ADS-B)message.The ADS-B equipment can be used for position... Due to the influence of terrain structure,meteorological conditions and various factors,there are anomalous data in automatic dependent surveillance-broadcast(ADS-B)message.The ADS-B equipment can be used for positioning of general aviation aircraft.Aim to acquire the accurate position information of aircraft and detect anomaly data,the ADS-B anomaly data detection model based on deep learning and difference of Gaussian(DoG)approach is proposed.First,according to the characteristic of ADS-B data,the ADS-B position data are transformed into the coordinate system.And the origin of the coordinate system is set up as the take-off point.Then,based on the kinematic principle,the ADS-B anomaly data can be removed.Moreover,the details of the ADS-B position data can be got by the DoG approach.Finally,the long short-term memory(LSTM)neural network is used to optimize the recurrent neural network(RNN)with severe gradient reduction for processing ADS-B data.The position data of ADS-B are reconstructed by the sequence to sequence(seq2seq)model which is composed of LSTM neural network,and the reconstruction error is used to detect the anomalous data.Based on the real flight data of general aviation aircraft,the simulation results show that the anomaly data can be detected effectively by the proposed method of reconstructing ADS-B data with the seq2seq model,and its running time is reduced.Compared with the RNN,the accuracy of anomaly detection is increased by 2.7%.The performance of the proposed model is better than that of the traditional anomaly detection models. 展开更多
关键词 general aviation aircraft automatic dependent surveillance-broadcast(ADS-B) anomaly data detection deep learning difference of Gaussian(DoG) long short-term memory(LSTM)
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