Frank L.Lewis (Life Fellow,IEEE) received the Ph.D.degree from the Georgia Institute of Technology.He is currently a member of the National Academy of Inventors and the Moncrief-O'Donnell Chair with The University...Frank L.Lewis (Life Fellow,IEEE) received the Ph.D.degree from the Georgia Institute of Technology.He is currently a member of the National Academy of Inventors and the Moncrief-O'Donnell Chair with The University of Texas at Arlington Research Institute.He is the author of seven U.S.patents,numerous journal special issues and journal articles,and 20 books.He received the Fulbright Research Award,the NSF Research Initiation Grant,the ASEE Terman Award,the International Neural Network Society Gabor Award,the U.K.Institute of Measurement and Control Honeywell Field Engineering Medal,the IEEE Computational Intelligence Society Neural Networks Pioneer Award,the AIAA Intelligent Systems Award,and the AACC Ragazzini Award.展开更多
3rd ASEE International Colloquium on Engineering Education opened in Tsinghua University on September 7, 2004. Xu Kuangdi, Vice Chairperson of the Chinese People’s Political Consultative Conference and President of C...3rd ASEE International Colloquium on Engineering Education opened in Tsinghua University on September 7, 2004. Xu Kuangdi, Vice Chairperson of the Chinese People’s Political Consultative Conference and President of Chinese Academy of Engineering, Wu Qidi, Deputy Minister of Ministry of Education, P.R.C., Sherra E. Kerns, President of American Society of Engineering Education and Vice-president of Olin College of Engineering, and Jack Wilson, President of University of Massachusetts System, attended the opening ceremony held in the morning and all gave speeches at the ceremony.展开更多
The sampling process is very inefficient for sam-pling-based motion planning algorithms that excess random sam-ples are generated in the planning space.In this paper,we pro-pose an adaptive space expansion(ASE)approac...The sampling process is very inefficient for sam-pling-based motion planning algorithms that excess random sam-ples are generated in the planning space.In this paper,we pro-pose an adaptive space expansion(ASE)approach which belongs to the informed sampling category to improve the sampling effi-ciency for quickly finding a feasible path.The ASE method enlarges the search space gradually and restrains the sampling process in a sequence of small hyper-ellipsoid ring subsets to avoid exploring the unnecessary space.Specifically,for a con-structed small hyper-ellipsoid ring subset,if the algorithm cannot find a feasible path in it,then the subset is expanded.Thus,the ASE method successively does space exploring and space expan-sion until the final path has been found.Besides,we present a particular construction method of the hyper-ellipsoid ring that uniform random samples can be directly generated in it.At last,we present a feasible motion planner BiASE and an asymptoti-cally optimal motion planner BiASE*using the bidirectional exploring method and the ASE strategy.Simulations demon-strate that the computation speed is much faster than that of the state-of-the-art algorithms.The source codes are available at https://github.com/shshlei/ompl.展开更多
文摘Frank L.Lewis (Life Fellow,IEEE) received the Ph.D.degree from the Georgia Institute of Technology.He is currently a member of the National Academy of Inventors and the Moncrief-O'Donnell Chair with The University of Texas at Arlington Research Institute.He is the author of seven U.S.patents,numerous journal special issues and journal articles,and 20 books.He received the Fulbright Research Award,the NSF Research Initiation Grant,the ASEE Terman Award,the International Neural Network Society Gabor Award,the U.K.Institute of Measurement and Control Honeywell Field Engineering Medal,the IEEE Computational Intelligence Society Neural Networks Pioneer Award,the AIAA Intelligent Systems Award,and the AACC Ragazzini Award.
文摘3rd ASEE International Colloquium on Engineering Education opened in Tsinghua University on September 7, 2004. Xu Kuangdi, Vice Chairperson of the Chinese People’s Political Consultative Conference and President of Chinese Academy of Engineering, Wu Qidi, Deputy Minister of Ministry of Education, P.R.C., Sherra E. Kerns, President of American Society of Engineering Education and Vice-president of Olin College of Engineering, and Jack Wilson, President of University of Massachusetts System, attended the opening ceremony held in the morning and all gave speeches at the ceremony.
基金supported in part by the National Natural Science Foun-dation of China(51975236)the National Key Research and Development Program of China(2018YFA0703203)the Innovation Project of Optics Valley Laboratory(OVL2021BG007)。
文摘The sampling process is very inefficient for sam-pling-based motion planning algorithms that excess random sam-ples are generated in the planning space.In this paper,we pro-pose an adaptive space expansion(ASE)approach which belongs to the informed sampling category to improve the sampling effi-ciency for quickly finding a feasible path.The ASE method enlarges the search space gradually and restrains the sampling process in a sequence of small hyper-ellipsoid ring subsets to avoid exploring the unnecessary space.Specifically,for a con-structed small hyper-ellipsoid ring subset,if the algorithm cannot find a feasible path in it,then the subset is expanded.Thus,the ASE method successively does space exploring and space expan-sion until the final path has been found.Besides,we present a particular construction method of the hyper-ellipsoid ring that uniform random samples can be directly generated in it.At last,we present a feasible motion planner BiASE and an asymptoti-cally optimal motion planner BiASE*using the bidirectional exploring method and the ASE strategy.Simulations demon-strate that the computation speed is much faster than that of the state-of-the-art algorithms.The source codes are available at https://github.com/shshlei/ompl.
文摘报道了一种利用频率为几千赫兹的高频 CO2激光脉冲的热冲击效应制作长周期光纤光栅的新技术。实验中,作者首次发现这种新型的长周期光纤光栅具有一些独特的光学特性,比如弯曲特性和横向负载特性等,这主要是因为用高频 CO2激光脉冲写成的长周期光纤光栅的横截面折射率分布不对称所致。基于这种新型长周期光纤光栅,设计了一种用于减小掺铒光纤放大器噪声系数的 ASE 噪声滤波器和平坦掺铒光纤放大器增益谱的增益均衡器,此外,还利用这种新型长周期光纤光栅独特的弯曲和压力特性,研究设计了两种用于动态平坦掺铒光纤放大器增益谱的动态增益均衡器。
