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RISS 인기검색어
- 검색키워드
- 저자 : Yang Xiuxia (검색결과 4 건)
- 무료
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Study on Dynamic Guidance Obstacle Avoidance of UAV based on the Minimum Angle Shift
Xiong zhiyong,Yang Xiuxia,Zhang Yi,Hua Wei,Liu Xiaowei 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.3
With the extensive use of UAV, how to make the UAV avoid the obstacle and arrive at the destination has become a hot issue. To make the angle shift minimum, a method on dynamic guidance obstacle avoidance of UAV based on the minimum angle shift is proposed, considering the constraints such as the completion time of obstacle, the motor performance, the direction of velocity after obstacle avoidance and so on, determining the range of guidance parameters. In the meanwhile, the obstacle method is extended to 3D-space based on 2D. Moreover, numerical simulations are carried out to verify the effectiveness of the method.
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Ketogenic Diet in Infants with Early-Onset Epileptic Encephalopathy and SCN2A Mutation
Xiaoyu Tian,Yange Zhang,Jinhong Zhang,Yan Lu,Xinyi Men,Xiuxia Wang 연세대학교의과대학 2021 Yonsei medical journal Vol.62 No.4
Research has shown mutations in the voltage-gated sodium channel gene SCN2A to be associated with developmental delaysand infantile seizures in patients with early-onset epileptic encephalopathies (EOEEs). Here, we report the case of an infant witha de novo SCN2A mutation with EOEE who had medically refractory seizures that improved with a ketogenic diet (KD) implementedat an age less than 2 months. On the day of his birth, the infant presented with a pattern of convulsions with dozens ofepisodes per day. An initial video electroencephalogram revealed poor reactivity of background activity, with multiple partial episodesstarting from the right temporal region, and abnormal electrical activity in the right hemisphere. The seizures previouslywere not controlled with successive therapy with phenobarbital, topiramate, and levetiracetam. Genetic testing revealed the presenceof a mutation in the SCN2A gene (c.4425C>G, p.Asn1475Lys). The infant’s seizures decreased significantly with a combinationof KD and medication. The present case exemplifies the potential for personalized genomics in identifying the etiology of anillness. Furthermore, the KD appears to feasible in infants younger than 2 months and might elicit good responses to EOEE associatedwith SCN2A mutation.
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Study on Dynamic Guidance Obstacle Avoidance for UAV
Xiong Zhiyong,Yang Xiuxia,Zhang Yi,Hua Wei,Zhou Weiei 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.8
With the flight environment becoming more and more complex, how to avoid the moving threat for the UAV under the dynamic environment and complete the mission become a key problem. With the idea of guidance, using the method of dimension reduction, the dynamic guidance obstacle avoidance method in three dimensional spaces is given. Considering the collision avoidance completion time and the UAV’s maneuverability, the parameters range of obstacle avoidance navigation law are deduced. Simulation results show the validity of the algorithm.
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Research on Energy Density and Specific Capacitance of Aqueous Supercapacitors
Yuanze Ma,Xiuxia Zhang,Yi Yang,Yanlin Li 한국전기전자재료학회 2021 Transactions on Electrical and Electronic Material Vol.22 No.6
As a novel energy storage device, supercapacitors with characteristics of large capacitance, high power density and long cycle life can meet the high requirements of energy storage units, having applied in portable instruments, data memory storage systems and electromobile, etc. However, a relatively low energy density limits the further employment of supercapacitors. This paper expounded the concept, composition and energy storage mechanism of supercapacitors in detail, and introduced the advantages and disadvantages of different types of supercapacitors as energy storage components. Meanwhile, the influence of electrode material and structure on the energy density and specific capacitance of aqueous supercapacitors were also discussed, and the problems existing in the current supercapacitors and the direction of future development were analyzed and summarized.
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