In vocational education,teacher leadership is an important factor in promoting school development and improving teaching quality.Enhancing teacher leadership has practical significance for the connotative development ...In vocational education,teacher leadership is an important factor in promoting school development and improving teaching quality.Enhancing teacher leadership has practical significance for the connotative development of vocational colleges.It involves improving education and teaching quality,cultivating high-skilled talents,building excellent teaching teams,enhancing school governance systems,and other areas.The core elements include professional knowledge,teaching innovation,teamwork,and communication skills.The enhancement of teacher leadership can effectively enhance teachers’enthusiasm to participate in educational and teaching reforms as well as promote the overall efficiency of vocational colleges.In order to enhance teacher leadership in vocational colleges,it is necessary to achieve a breakthrough in institutional barriers,combine personal and external factors,strengthen institutionalized teacher leadership construction through a top-down design,and strengthen evaluation and feedback mechanisms to establish a scientific leadership evaluation system and improve teacher leadership cognition.展开更多
In this paper, we investigate the interference coordination for downlink full-dimension multiple-input multiple-output(FD-MIMO) systems with device-to-device(D2 D) communications underlaying. With three-dimensional(3 ...In this paper, we investigate the interference coordination for downlink full-dimension multiple-input multiple-output(FD-MIMO) systems with device-to-device(D2 D) communications underlaying. With three-dimensional(3 D) beamforming transmission applied for cellular users(CUEs), an approximation of the interference to signal ratio for CUEs is derived, and a coordination strategy is proposed to mitigate the interference from D2 D pairs to CUEs. Based on the lower bound of the interference to signal ratio for D2 D pairs, we propose coordination strategies for D2 D pairs to mitigate the interference caused by base station(BS) and the interference between D2 D pairs. The proposed strategies require only some statistical channel state information(CSI) of each user and the reduced-dimensional effective CSI of a few CUEs and D2 D pairs. Simulation results show that the proposed coordination strategy performs well in terms of achieving good tradeoff between the achievable rate of CUEs and D2 D pairs.展开更多
文摘In vocational education,teacher leadership is an important factor in promoting school development and improving teaching quality.Enhancing teacher leadership has practical significance for the connotative development of vocational colleges.It involves improving education and teaching quality,cultivating high-skilled talents,building excellent teaching teams,enhancing school governance systems,and other areas.The core elements include professional knowledge,teaching innovation,teamwork,and communication skills.The enhancement of teacher leadership can effectively enhance teachers’enthusiasm to participate in educational and teaching reforms as well as promote the overall efficiency of vocational colleges.In order to enhance teacher leadership in vocational colleges,it is necessary to achieve a breakthrough in institutional barriers,combine personal and external factors,strengthen institutionalized teacher leadership construction through a top-down design,and strengthen evaluation and feedback mechanisms to establish a scientific leadership evaluation system and improve teacher leadership cognition.
基金supported in part by the National Natural Science Foundation of China(Grants No.61831013 and No.61571112)Foundation for the Author of National Excellent Doctoral Dissertation of PR China(FANEDD)(Grant No.201446)
文摘In this paper, we investigate the interference coordination for downlink full-dimension multiple-input multiple-output(FD-MIMO) systems with device-to-device(D2 D) communications underlaying. With three-dimensional(3 D) beamforming transmission applied for cellular users(CUEs), an approximation of the interference to signal ratio for CUEs is derived, and a coordination strategy is proposed to mitigate the interference from D2 D pairs to CUEs. Based on the lower bound of the interference to signal ratio for D2 D pairs, we propose coordination strategies for D2 D pairs to mitigate the interference caused by base station(BS) and the interference between D2 D pairs. The proposed strategies require only some statistical channel state information(CSI) of each user and the reduced-dimensional effective CSI of a few CUEs and D2 D pairs. Simulation results show that the proposed coordination strategy performs well in terms of achieving good tradeoff between the achievable rate of CUEs and D2 D pairs.
