语文说明文教学支持平台的设计及应用

本文旨在通过分析信息技术环境下的说明文教学现状,提出说明文教学与信息技术整合的有效方法,研究说明文教学支持平台的内容结构及功能结构,并以一个具体的案例说明该平台的教学应用模式。

信息技术与说明文阅读教学的整合研究

信息技术与课程的有效整合是教育信息化的关键,而目前的信息技术与语文学科教学整合还停留在学科层面,缺乏针对不同课程内容的整合模式的系统研究。本文旨在通过信息技术与说明文教学整合的研究,给出信息技术与语文说明文的整合方法,具体包括语文说明文教学的理想教学过程和整合点的诊断,以及整合点的解决办法。

The First Principle Study on the Rectification of Molecular Junctions Based on the Alkyl-chain-modified Phenyl Benzothiophene Derivative

Using density functional theory（DFT） combined with nonequilibrium Green＇s function investigates the electron-transport properties of several molecular junctions based on the PBTDT-CH=NH molecule, which is modified by one to four alkyl groups forming PBTDT-（CH2）nCH=NH. The electronic structures of the isolated molecules（thiol-ended PBTDT-（CH2）nCH=N） have been investigated before the electron-transport calculations are performed. The asymmetric current-voltage characteristics have been obtained for the molecular junctions. Rectifying performance of Au/S-PBTDT-CH=N-S/Au molecular junction can be regulated by introducing alkyl chain. The N3 molecular junction exhibits the best rectifying effect. Its maximum rectifying ratio is 878, which is 80 times more than that of the molecular junction based on the original N molecular junction. The current-voltage（I-V） curves of all the sandwich systems in this work are illustrated by transmission spectra and molecular projection density analysis.

语文说明文教学支持平台的设计及应用

本文旨在通过分析信息技术环境下的说明文教学现状，提出说明文教学与信息技术整合的有效方法，研究说明文教学支持平台的内容结构及功能结构，并以一个具体的案例说明该平台的教学应用模式。