China’s largest optical telescope will soon come online to benefit the country and the world The limits of human sight have been expanding ever since Galileo pointed his telescope to the sky 400 years ago. And now, ...China’s largest optical telescope will soon come online to benefit the country and the world The limits of human sight have been expanding ever since Galileo pointed his telescope to the sky 400 years ago. And now, LAMOST, the Chinese-built Large Sky Area Multi-Object展开更多
EXCERPTS FROM MAJOR CHINESE MAGAZINES RETURN OF THE SAND MARTINS Oriental Outlook 29 May In late April,a sandy cliff along the Yongding River in southern Beijing became an unexpected attraction.Speckled with more than...EXCERPTS FROM MAJOR CHINESE MAGAZINES RETURN OF THE SAND MARTINS Oriental Outlook 29 May In late April,a sandy cliff along the Yongding River in southern Beijing became an unexpected attraction.Speckled with more than 100 nests built by sand martins,migratory birds that return to the city each summer,the site has become one of the largest breeding grounds for the species in the Chinese capital.Just a year ago,this fragile micro-habitat was nearly lost to a river management project.Fortunately,a group of bird-watchers spotted the threat in time and alerted city officials.展开更多
LewisThomas.The Youngest Science:Notes of a Medicine-Watcher[M].Penguin PublishingGroup,1995.LewisThomas.The Lives of A Cell:Notes of A Biology Watcher[M].Penguin PublishingGroup,1978.LewisThomas.The Medusa and the Sn...LewisThomas.The Youngest Science:Notes of a Medicine-Watcher[M].Penguin PublishingGroup,1995.LewisThomas.The Lives of A Cell:Notes of A Biology Watcher[M].Penguin PublishingGroup,1978.LewisThomas.The Medusa and the Snail:More Notes of A Biology Watcher[M].PenguinPublishingGroup,1995.日前,笔者买到三本企鹅出版社出的刘易斯·托马斯(LewisThomas,1913—1993)(1)的书:TheYoungest Science:Notes of a medicine-watcher(1995)、The Lives of A Cell:Notes of a biology watcher(1978)和TheMedusa and the Snail:More notes of a biology watcher(1995)(2)。展开更多
对多机器人协作运输时环境地形起伏不平,运输过程中机器人和物体发生滑动的问题,提出了起伏地形环境中的协作运输策略.将观测者-推动者模式的多机器人协作推箱子任务转换为多机器人编队任务,通过基于几何规划的虚拟目标序列跟踪方法实...对多机器人协作运输时环境地形起伏不平,运输过程中机器人和物体发生滑动的问题,提出了起伏地形环境中的协作运输策略.将观测者-推动者模式的多机器人协作推箱子任务转换为多机器人编队任务,通过基于几何规划的虚拟目标序列跟踪方法实现被推动物体脱离运动方向时运输编队的重新形成.协作运输策略中的观测者机器人采用平缓地形优先(navigate plain first to destination,NPFD)导航策略指导编队运动.展开更多
文摘China’s largest optical telescope will soon come online to benefit the country and the world The limits of human sight have been expanding ever since Galileo pointed his telescope to the sky 400 years ago. And now, LAMOST, the Chinese-built Large Sky Area Multi-Object
文摘EXCERPTS FROM MAJOR CHINESE MAGAZINES RETURN OF THE SAND MARTINS Oriental Outlook 29 May In late April,a sandy cliff along the Yongding River in southern Beijing became an unexpected attraction.Speckled with more than 100 nests built by sand martins,migratory birds that return to the city each summer,the site has become one of the largest breeding grounds for the species in the Chinese capital.Just a year ago,this fragile micro-habitat was nearly lost to a river management project.Fortunately,a group of bird-watchers spotted the threat in time and alerted city officials.
文摘LewisThomas.The Youngest Science:Notes of a Medicine-Watcher[M].Penguin PublishingGroup,1995.LewisThomas.The Lives of A Cell:Notes of A Biology Watcher[M].Penguin PublishingGroup,1978.LewisThomas.The Medusa and the Snail:More Notes of A Biology Watcher[M].PenguinPublishingGroup,1995.日前,笔者买到三本企鹅出版社出的刘易斯·托马斯(LewisThomas,1913—1993)(1)的书:TheYoungest Science:Notes of a medicine-watcher(1995)、The Lives of A Cell:Notes of a biology watcher(1978)和TheMedusa and the Snail:More notes of a biology watcher(1995)(2)。
文摘对多机器人协作运输时环境地形起伏不平,运输过程中机器人和物体发生滑动的问题,提出了起伏地形环境中的协作运输策略.将观测者-推动者模式的多机器人协作推箱子任务转换为多机器人编队任务,通过基于几何规划的虚拟目标序列跟踪方法实现被推动物体脱离运动方向时运输编队的重新形成.协作运输策略中的观测者机器人采用平缓地形优先(navigate plain first to destination,NPFD)导航策略指导编队运动.
