选取华东师范大学儿童语言研究中心zhou2语料库中的400名3-5岁学前儿童作为研究对象,运用国际叙事语言评估工具——MAIN(Multilingual Assessment Instrument for Narratives)中《鸟》的故事作为研究材料进行数据收集,并使用MAIN从故事...选取华东师范大学儿童语言研究中心zhou2语料库中的400名3-5岁学前儿童作为研究对象,运用国际叙事语言评估工具——MAIN(Multilingual Assessment Instrument for Narratives)中《鸟》的故事作为研究材料进行数据收集,并使用MAIN从故事结构、结构复杂性、内部状态术语、故事理解四个方面,重点考察3-5岁学前儿童讲述故事的叙事能力,以及各要素的叙事水平是否存在年龄差异。结果表明:儿童叙事能力随年龄增长呈不均衡发展态势,且4-5岁为儿童叙事能力发展的转折期;儿童对故事各要素讲述能力的发展具有显著年龄差异;儿童故事理解能力各要素均处于较低发展水平。展开更多
For the past few years,germanium-based semiconductor spintronics has attracted considerable interest due to its potential for integration into mainstream semiconductor technology.The main challenges in the development...For the past few years,germanium-based semiconductor spintronics has attracted considerable interest due to its potential for integration into mainstream semiconductor technology.The main challenges in the development of modern semiconductor spintronics are the generation,detection,and manipulation of spin currents.Here,the transport characteristics of a spin current generated by spin pumping through a GeBi semiconductor barrier in Y_(3)Fe_(5)O_(12)/GeBi/Pt heterostructures were investigated systematically.The effective spin-mixing conductance and inverse spin Hall voltage to quantitatively describe the spin transport characteristics were extracted.The spin-injection efficiency in the Y_(3)Fe_(5)O_(12)/GeBi/Pt heterostructures is comparable to that of the Y_(3)Fe_(5)O_(12)/Pt bilayer,and the inverse spin Hall voltage exponential decays with the increase in the barrier thickness.Furthermore,the band gap of the GeBi layer was tuned by changing the Bi content.The spin-injection efficiency at the YIG/semiconductor interface and the spin transportation within the semiconductor barrier are related to the band gap of the GeBi layer.Our results may be used as guidelines for the fabrication of efficient spin transmission structures and may lead to further studies on the impacts of different kinds of barrier materials.展开更多
基金the supports of the National Natural Science Foundation of China (No. 51901153)Natural Science Foundation of Shanxi Province,China (No. 201901D211096)。
文摘选取华东师范大学儿童语言研究中心zhou2语料库中的400名3-5岁学前儿童作为研究对象,运用国际叙事语言评估工具——MAIN(Multilingual Assessment Instrument for Narratives)中《鸟》的故事作为研究材料进行数据收集,并使用MAIN从故事结构、结构复杂性、内部状态术语、故事理解四个方面,重点考察3-5岁学前儿童讲述故事的叙事能力,以及各要素的叙事水平是否存在年龄差异。结果表明:儿童叙事能力随年龄增长呈不均衡发展态势,且4-5岁为儿童叙事能力发展的转折期;儿童对故事各要素讲述能力的发展具有显著年龄差异;儿童故事理解能力各要素均处于较低发展水平。
基金Project supported by the National Key Research and Development Program of China(Grant No.2021YFA0718701)the China Postdoctoral Science Foundation(Grant No.2022M722888)the National Natural Science Foundation of China(Grant Nos.12174347 and 12004340).
文摘For the past few years,germanium-based semiconductor spintronics has attracted considerable interest due to its potential for integration into mainstream semiconductor technology.The main challenges in the development of modern semiconductor spintronics are the generation,detection,and manipulation of spin currents.Here,the transport characteristics of a spin current generated by spin pumping through a GeBi semiconductor barrier in Y_(3)Fe_(5)O_(12)/GeBi/Pt heterostructures were investigated systematically.The effective spin-mixing conductance and inverse spin Hall voltage to quantitatively describe the spin transport characteristics were extracted.The spin-injection efficiency in the Y_(3)Fe_(5)O_(12)/GeBi/Pt heterostructures is comparable to that of the Y_(3)Fe_(5)O_(12)/Pt bilayer,and the inverse spin Hall voltage exponential decays with the increase in the barrier thickness.Furthermore,the band gap of the GeBi layer was tuned by changing the Bi content.The spin-injection efficiency at the YIG/semiconductor interface and the spin transportation within the semiconductor barrier are related to the band gap of the GeBi layer.Our results may be used as guidelines for the fabrication of efficient spin transmission structures and may lead to further studies on the impacts of different kinds of barrier materials.
