It bus been 40 years since China embarked on ＂crossing the river by feel ing the stones,＂ navigating through the untrodden path and uncharted waters to drive its iconic modemization effort through reform and opening...It bus been 40 years since China embarked on ＂crossing the river by feel ing the stones,＂ navigating through the untrodden path and uncharted waters to drive its iconic modemization effort through reform and opening up.展开更多
Based on the questionnaires and interviews, this paper, in terms of target needs and learning needs, analyses the needs of professional development of the middle school English teachers in rural areas of western China...Based on the questionnaires and interviews, this paper, in terms of target needs and learning needs, analyses the needs of professional development of the middle school English teachers in rural areas of western China. The analysis shows that all the subjects need to improve the Basic English language skills and knowledge. In-service training and retraining are the effective ways to help develop their professionalism, but due to the limitations of all kinds of obstacles, their learning needs cannot be met. Only by the concerted efforts by the society and the teachers themselves, the problems arising in their professional development can be solved.展开更多
Measurement-device-independent quantum key distribution(MDI-QKD) offers a practical way to realize a startype quantum network. Previous experiments on MDI-QKD networks can only support the point-to-point communication...Measurement-device-independent quantum key distribution(MDI-QKD) offers a practical way to realize a startype quantum network. Previous experiments on MDI-QKD networks can only support the point-to-point communication. We experimentally demonstrate a plug-and-play MDI-QKD network which can support the pointto-multipoint communication among three users. Benefiting from the plug-and-play MDI-QKD architecture,the whole network is automatically stabilized in spectrum, polarization, arrival time, and phase reference. The users only need the encoding devices, which means that the hardware requirements are greatly reduced. Our experiment shows that it is feasible to establish a point-to-multipoint MDI-QKD network.展开更多
文摘It bus been 40 years since China embarked on ＂crossing the river by feel ing the stones,＂ navigating through the untrodden path and uncharted waters to drive its iconic modemization effort through reform and opening up.
文摘Based on the questionnaires and interviews, this paper, in terms of target needs and learning needs, analyses the needs of professional development of the middle school English teachers in rural areas of western China. The analysis shows that all the subjects need to improve the Basic English language skills and knowledge. In-service training and retraining are the effective ways to help develop their professionalism, but due to the limitations of all kinds of obstacles, their learning needs cannot be met. Only by the concerted efforts by the society and the teachers themselves, the problems arising in their professional development can be solved.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11674397 and 61671455
文摘Measurement-device-independent quantum key distribution(MDI-QKD) offers a practical way to realize a startype quantum network. Previous experiments on MDI-QKD networks can only support the point-to-point communication. We experimentally demonstrate a plug-and-play MDI-QKD network which can support the pointto-multipoint communication among three users. Benefiting from the plug-and-play MDI-QKD architecture,the whole network is automatically stabilized in spectrum, polarization, arrival time, and phase reference. The users only need the encoding devices, which means that the hardware requirements are greatly reduced. Our experiment shows that it is feasible to establish a point-to-multipoint MDI-QKD network.
