Purpose-This paper aims to examine the educational demands in the digital age from tomorrow’s teachers and policy-makers,and to encourage and incentivize all actors to develop the innovative learning environments tha...Purpose-This paper aims to examine the educational demands in the digital age from tomorrow’s teachers and policy-makers,and to encourage and incentivize all actors to develop the innovative learning environments that we need for tomorrow’s schools.Design/Approach/Methods-As a conceptual paper,this article has consulted and analyzed a wide range of updated data and literature to consolidate the argumentation on tomorrow’s educational demands.Findings-The paper mainly provides possible answers on how to educate students for their future,rather than our past.The heart of future education is to help students develop a reliable compass and tools,transformative competency,and to navigate through an increasingly complex,volatile,and uncertain world.To fulfill this core mission,a new set of curriculum design principles,changing school system,renewed teacher culture,and an alternative assessment program are highly advocated.Originality/Value-Based on the latest observations and reflections,the paper broadens our visions on tomorrow’s education and future schools.展开更多
A concept of space-surface bistatic synthetic aperture radar (SS-BSAR) passive imaging system is proposed,which is parasitic on the signal of COMPASS Navigation Satellite System (CNSS).The feasibility is demonstrated ...A concept of space-surface bistatic synthetic aperture radar (SS-BSAR) passive imaging system is proposed,which is parasitic on the signal of COMPASS Navigation Satellite System (CNSS).The feasibility is demonstrated by analyzing the signal ambiguity function and the range resolution as well as the system topology.Due to the multiple peaks of signal in the auto-correlation function,a new correlation is used to remove the side-peaks.A double-channel receiver is employed to receive the direct satellite signal and the ground reflected signal.The direct signal is a reference signal in range compression,and may also be used for transmitter-receiver signal synchronization.The reflected signal is raw data collected for imaging.Then,a modified range-Doppler imaging algorithm is derived based on the system geometric models and BSAR imaging principle.The proposed algorithm is verified via signal simulation.The work in this paper is of great value to the further use of COMPASS signal,as well as other global navigation satellite signals in passive imaging.展开更多
文摘Purpose-This paper aims to examine the educational demands in the digital age from tomorrow’s teachers and policy-makers,and to encourage and incentivize all actors to develop the innovative learning environments that we need for tomorrow’s schools.Design/Approach/Methods-As a conceptual paper,this article has consulted and analyzed a wide range of updated data and literature to consolidate the argumentation on tomorrow’s educational demands.Findings-The paper mainly provides possible answers on how to educate students for their future,rather than our past.The heart of future education is to help students develop a reliable compass and tools,transformative competency,and to navigate through an increasingly complex,volatile,and uncertain world.To fulfill this core mission,a new set of curriculum design principles,changing school system,renewed teacher culture,and an alternative assessment program are highly advocated.Originality/Value-Based on the latest observations and reflections,the paper broadens our visions on tomorrow’s education and future schools.
基金supported by the National Basic Research Program of China (Grant No.2011CB707001)
文摘A concept of space-surface bistatic synthetic aperture radar (SS-BSAR) passive imaging system is proposed,which is parasitic on the signal of COMPASS Navigation Satellite System (CNSS).The feasibility is demonstrated by analyzing the signal ambiguity function and the range resolution as well as the system topology.Due to the multiple peaks of signal in the auto-correlation function,a new correlation is used to remove the side-peaks.A double-channel receiver is employed to receive the direct satellite signal and the ground reflected signal.The direct signal is a reference signal in range compression,and may also be used for transmitter-receiver signal synchronization.The reflected signal is raw data collected for imaging.Then,a modified range-Doppler imaging algorithm is derived based on the system geometric models and BSAR imaging principle.The proposed algorithm is verified via signal simulation.The work in this paper is of great value to the further use of COMPASS signal,as well as other global navigation satellite signals in passive imaging.
