时至今日,国内大部分高校在实践教学方面依然保持着传统的理论实训模式,在技能培养方面也未有实质性的教学模型应用。而在新兴的物联网产业方面,学生只有课本理论而无实践基础。因此建设以物联网技术为主的教学模型实验室迫在眉睫。方...时至今日,国内大部分高校在实践教学方面依然保持着传统的理论实训模式,在技能培养方面也未有实质性的教学模型应用。而在新兴的物联网产业方面,学生只有课本理论而无实践基础。因此建设以物联网技术为主的教学模型实验室迫在眉睫。方案主要以IGX Web SCADA及物联网网关为中枢,智慧农业作业棚为辅助,同时结合传感器、新型PLC控制器、工控机设计而成。在此教学模型的帮助下,可有效解决高校实践教学存在的短板,提高学生对物联网技术布置和自控设备编程调试的认识,同时为智慧农业建设物联网作业棚提供了参考依据。展开更多
Two-dimensional(2D)ferroelectric(FE)systems are promising candidates for non-volatile nanodevices.Previous studies mainly focused on 2D compounds.Though counter-intuitive,here we propose several new phases of telluriu...Two-dimensional(2D)ferroelectric(FE)systems are promising candidates for non-volatile nanodevices.Previous studies mainly focused on 2D compounds.Though counter-intuitive,here we propose several new phases of tellurium with(anti)ferroelectricity.Two-dimensional films can be viewed as a collection of one-dimensional chains,and lone-pair instability is responsible for the(anti)ferroelectricity.The total polarization is determined to be 0.34×10^(-10)C/m for the FE ground state.Due to the local polarization field in the FE film,we show a large Rashba splitting(α_(R)~2 eV·?)with nonzero spin Hall conductivity for experimental detection.Furthermore,a dipole-like distribution of Berry curvature is verified,which may facilitate a nonlinear Hall effect.Because Rashba-splitting/Berry-curvature distributions are fully coupled with a polarization field,they can be reversed through FE phase transition.Our results not only broaden the elemental FE materials,but also shed light on their intriguing transport phenomena.展开更多
文摘时至今日,国内大部分高校在实践教学方面依然保持着传统的理论实训模式,在技能培养方面也未有实质性的教学模型应用。而在新兴的物联网产业方面,学生只有课本理论而无实践基础。因此建设以物联网技术为主的教学模型实验室迫在眉睫。方案主要以IGX Web SCADA及物联网网关为中枢,智慧农业作业棚为辅助,同时结合传感器、新型PLC控制器、工控机设计而成。在此教学模型的帮助下,可有效解决高校实践教学存在的短板,提高学生对物联网技术布置和自控设备编程调试的认识,同时为智慧农业建设物联网作业棚提供了参考依据。
基金supported by the National Natural Science Foundation of China(Grant Nos.11904317 and 12204029)the Funding of Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(Grant No.2020R01002)the Natural Science Foundation of Zhejiang Province(Grant Nos.LY23E020010 and LQ23A040013)。
文摘Two-dimensional(2D)ferroelectric(FE)systems are promising candidates for non-volatile nanodevices.Previous studies mainly focused on 2D compounds.Though counter-intuitive,here we propose several new phases of tellurium with(anti)ferroelectricity.Two-dimensional films can be viewed as a collection of one-dimensional chains,and lone-pair instability is responsible for the(anti)ferroelectricity.The total polarization is determined to be 0.34×10^(-10)C/m for the FE ground state.Due to the local polarization field in the FE film,we show a large Rashba splitting(α_(R)~2 eV·?)with nonzero spin Hall conductivity for experimental detection.Furthermore,a dipole-like distribution of Berry curvature is verified,which may facilitate a nonlinear Hall effect.Because Rashba-splitting/Berry-curvature distributions are fully coupled with a polarization field,they can be reversed through FE phase transition.Our results not only broaden the elemental FE materials,but also shed light on their intriguing transport phenomena.
