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| 1 | NSHV trajectory prediction algorithm based on aerodynamic acceleration EMD decomposition显示文摘Aiming at the problem of gliding near space hypersonic vehicle(NSHV)trajectory prediction,a trajectory prediction method based on aerodynamic acceleration empirical mode decomposition(EMD)is proposed.The method analyzes the motion characteristics of the skipping gliding NSHV and verifies that the aerodynamic acceleration of the target has a relatively stable rule.On this basis,EMD is used to extract the trend of aerodynamic acceleration into multiple sub-items,and aggregate sub-items with similar attributes.Then,a prior basis function is set according to the aerodynamic acceleration stability rule,and the aggregated data are fitted by the basis function to predict its future state.After that,the prediction data of the aerodynamic acceleration are used to drive the system to predict the target trajectory.Finally,experiments verify the effectiveness of the method.In addition,the distribution of prediction errors in space is discussed,and the reasons are analyzed. | LI Fan XIONG Jiajun LAN Xuhui BI Hongkui CHEN Xin | 2021 | Journal of Systems Engineering and Electronics2021，32，1： | 6 |
| 2 | Hypersonic Vehicle Trajectory Prediction Algorithm Based on Hough Transform显示文摘Trajectory prediction is a prerequisite for missile and high-speed vehicle guidance interception.To address the trajectory problem for the near space hypersonic unpowered gliding vehicle.Firstly,the trajectory prediction mechanism is analyzed.Based on the existing NSHV trajectory prediction method,the key techniques of trajectory prediction are discussed from the perspectives of prediction parameter selection and prediction parameter description.Then,a trajectory prediction method based on Hough transform is proposed.The core of the method is to select the longitude latitude,and high direction positions as prediction parameters,and use the Hough transform to fit the prior basis functions.In the latitude and longitude direction,the rationality of predicting parameters is discussed from two aspects:position extreme point and lateral maneuverability.In the height direction,for the NSHV oscillation drop characteristic,two Hough transforms are used to separate the periodic term from the linear term.In addition,we give the approximate interval of the parameter values of the method,and design a parameter adaptive scheme.Finally,trajectory prediction is performed on two different control patterns.The error of the prediction time of 100 s is within 25 km,and the results show the effectiveness of the proposed method. | LI Fan XIONG Jiajun LAN Xuhui BI Hongkui TAN Xiansi | 2021 | Chinese Journal of Electronics2021，30，5： | 2 |
| 3 | A dual channel perturbation particle filter algorithm based on GPU acceleration显示文摘The particle filter(PF) algorithm is one of the most commonly used algorithms for maneuvering target tracking. The traditional PF maps from multi-dimensional information to onedimensional information during particle weight calculation, and the incorrect transmission of information leads to the fact that the particle prediction information does not match the weight information, and its essence is the reduction of the information entropy of the useful information. To solve this problem, a dual channel independent filtering method is proposed based on the idea of equalization mapping. Firstly, the particle prediction performance is described by particle manipulations of different dimensions, and the accuracy of particle prediction is improved. The improvement of particle degradation of this algorithm is analyzed in the aspects of particle weight and effective particle number. Secondly, according to the problem of lack of particle samples, the new particles are generated based on the filtering results, and the particle diversity is increased. Finally, the introduction of the graphics processing unit(GPU) parallel computing the platform, the 'channel-level' and 'particlelevel' parallel computing the program are designed to accelerate the algorithm. The simulation results show that the algorithm has the advantages of better filtering precision, higher particle efficiency and faster calculation speed compared with the traditional algorithm of the CPU platform. | LI Fan BI Hongkui XIONG Jiajun YU Chenlong LAN Xuhui | 2018 | Journal of Systems Engineering and Electronics2018，29，4： | 1 |
| 4 | Expert consensus on the prevention and treatment of substance use and addictive behaviour-related disorders during the COVID-19 pandemic显示文摘In early 2020,the COVID-19 outbreak complicated the diagnosis,treatm ent and rehabilitation of patients with substance use disorders and increased the risks of substance abuse and addictive behaviours,such as online gaming disorders,in the general public.Substance use disorder is a chronic recurrent brain disease characterised by strong cravings,high recurrence rates,and a high proportion of comorbidity of mental and physical disorders.1 Therefore,regular long-term therapeutic interventions are critical to preventing dm g relapses while maintaining withdrawal. | Jiang Du Ni Fan Min Zhao Wei Hao Tieqiao Liu Lin Lu Jie Shi Haifeng Jiang Na Zhong Xiaochang Lan Shichao Xu Hongxian Chen Xiaojun Xiang Xuyi Wang Hongqiang Sun Bing Li Yu-Ping Ning Jing Li Wanjun Guo Yajuan Niu Lixia Sheng Yi Li Xuebin Liu Xuhui Zhou Mincai Qian Wenhua Zhou Ruiling Zhang Hongxing Hu Yan Xia Zhonghua Su Ruimin Zhang Mei Yang Fen Liu Wei Yuan | 2020 | General Psychiatry2020，33，4： | 1 |
| 5 | Exposing vertebral artery from lateral to medial under the guide of peri-vertebral artery fat pad in far lateral approach显示文摘Far lateral approach(FLA),together with its modified approaches,is a fundamental surgical approach for surgical resection of lesions located at the ventral or ventrolateral side of the foramen magnum.[1,2,3,4,5]The key procedure in FLA is exposing the vertebral artery(VA)especially the V3 segment.[1,5,6]When performing an FLA,most neurosurgeons choose to expose the suboccipital triangle(formed by the rectus capitis posterior major,the superior oblique,and the inferior oblique)as a key anatomical landmark initially and then expose the V3 segment.[1,2,5,6,7]However,on the one hand,this muscular anatomical landmarks-suboccipital triangle varies in depth,morphology,and location in different patients,which increases the risk of VA injury during surgery.[3]On the other hand,this procedure could lead to exposing difficulty due to the obstruction of overlying layers of muscles and the distribution of blood vessels,which could prolong the time for craniotomy fairly.The course of VA could vary,such as looping backward and bulge posteriorly between the lips of the suboccipital triangle,where it could be damaged if one expects it to be found in the depth of the suboccipital triangle.[3]Thus,neurosurgeons have the potential for VA injury and a rather prolonged time to successfully expose VA. | Jiuhong Li Linlin Song Zhigang Lan Wenke Liu Yuekang Zhang Xuhui Hui Jianguo Xu Xuesong Liu | 2022 | Chinese Medical Journal2022，，4： | 0 |
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