To coincide with the UN InternationalYear of Planet Earth(2007-2009),three Earthscience teachers from the UK have compileda website with a vast,varied and stillexpanding collection of teaching activities.The simple ac...To coincide with the UN InternationalYear of Planet Earth(2007-2009),three Earthscience teachers from the UK have compileda website with a vast,varied and stillexpanding collection of teaching activities.The simple activities require fewresources(but can be readily adapted for usewith standard school lab equipment)and aredesigned to encourage students aged 8-18years to investigate how the Earth works(therecommended age range is given in eachactivity).You can discuss the idea withother interested people across the globe onthe associated blog,www.earthlearningidea.blogspot.com Each activity is accompaniedby‘back-up’notes for teachers.The activitiesare also being translated into Spanish,Norwegian,Italian,Chinese and Tamil.展开更多
Space deployable masts,as one of the most widely used branches of space deployable structures,can provide driving,positioning,and transmission functions for spacecraft in orbit,which are irreplaceable in complex space...Space deployable masts,as one of the most widely used branches of space deployable structures,can provide driving,positioning,and transmission functions for spacecraft in orbit,which are irreplaceable in complex space activities.The nonmagnetic telescopic tubular mast(NMTTM)is designed and manufactured by the Shenyang Institute of Automation,Chinese Academy of Sciences,aboard the SATech-01 satellite to keep the magnetic probe assembly away from magnetic interference and realize global magnetic field measurement.The NMTTM can withstand complicated vibration and shock during rocket launching in the retracted state of 0.95 m,while it can be stably released and deployed to 5.28 m in orbit.NMTTM was successfully launched into Sun-synchronous orbit on 27 July 2022,fully deployed,and generated the positioning signal after a duration of 19 min and 16 s for the deployment process on 7 November.This paper focuses on the whole process of NMTTM from mission requirements to structure design and manufacture,through to releasing,deployment,and locking technology,environmental simulation tests,up to on-orbit deployment verification,which provides valuable experience for the subsequent development and application of large-scale space deployable masts.展开更多
文摘To coincide with the UN InternationalYear of Planet Earth(2007-2009),three Earthscience teachers from the UK have compileda website with a vast,varied and stillexpanding collection of teaching activities.The simple activities require fewresources(but can be readily adapted for usewith standard school lab equipment)and aredesigned to encourage students aged 8-18years to investigate how the Earth works(therecommended age range is given in eachactivity).You can discuss the idea withother interested people across the globe onthe associated blog,www.earthlearningidea.blogspot.com Each activity is accompaniedby‘back-up’notes for teachers.The activitiesare also being translated into Spanish,Norwegian,Italian,Chinese and Tamil.
基金supported in part by National Key R&D Program of China(grant no.2018YFB1304600)Chinese Academy of Sciences Interdisciplinary Innovation Team(grant no.JCTD-2018-11)the Natural Science Foundation of China(grant no.51775541).
文摘Space deployable masts,as one of the most widely used branches of space deployable structures,can provide driving,positioning,and transmission functions for spacecraft in orbit,which are irreplaceable in complex space activities.The nonmagnetic telescopic tubular mast(NMTTM)is designed and manufactured by the Shenyang Institute of Automation,Chinese Academy of Sciences,aboard the SATech-01 satellite to keep the magnetic probe assembly away from magnetic interference and realize global magnetic field measurement.The NMTTM can withstand complicated vibration and shock during rocket launching in the retracted state of 0.95 m,while it can be stably released and deployed to 5.28 m in orbit.NMTTM was successfully launched into Sun-synchronous orbit on 27 July 2022,fully deployed,and generated the positioning signal after a duration of 19 min and 16 s for the deployment process on 7 November.This paper focuses on the whole process of NMTTM from mission requirements to structure design and manufacture,through to releasing,deployment,and locking technology,environmental simulation tests,up to on-orbit deployment verification,which provides valuable experience for the subsequent development and application of large-scale space deployable masts.
