Based on Verschueren’s Linguistic Adaptation Theory(1999)and Yu Guodong’s Linguistic Adaptation Model(2001),the present paper analyzes teachers’code-switching in both urban and rural junior middle schools from the ...Based on Verschueren’s Linguistic Adaptation Theory(1999)and Yu Guodong’s Linguistic Adaptation Model(2001),the present paper analyzes teachers’code-switching in both urban and rural junior middle schools from the pragmatic perspective of adaptation.展开更多
Code-switching is considered as a strategy of cognition, interaction and teaching. Foreign language teachers often use code-switching as a skill of pedagogy to teach students to learn foreign language and promote thei...Code-switching is considered as a strategy of cognition, interaction and teaching. Foreign language teachers often use code-switching as a skill of pedagogy to teach students to learn foreign language and promote their own teaching practice. Evidence shows that the proper sue of code-switching will promote English teaching practice, however, it is arguable that how to use native language to improve English teaching. This paper will discuss code-switching in Chinese English teaching with the SLA theories and put forward some guidance to teacher talk code-switching.展开更多
This paper investigates the features of teacher talk by two secondary school English teachers by using Bourdieu's framework. Based on data analysis of two class recordings, this study argued that the experienced t...This paper investigates the features of teacher talk by two secondary school English teachers by using Bourdieu's framework. Based on data analysis of two class recordings, this study argued that the experienced teacher was able to achieve her purpose by utilizing her cultural capital, while the less experienced teacher was less successful in claiming power and control due to her inadequate cultural capital and inappropriate code choice in the classroom. The study suggest that new teachers be advised on the potency of code selection to facilitate instruction.展开更多
Polyparaphenylene(PPP) is prepared by AlCl 3-CuCl 2 catalysts with benzene as the monomer and is doped by chemical method and N + ion implantation. The influences of the concentration, temperature and time of chemi...Polyparaphenylene(PPP) is prepared by AlCl 3-CuCl 2 catalysts with benzene as the monomer and is doped by chemical method and N + ion implantation. The influences of the concentration, temperature and time of chemical doping and the dose, energy and temperature of ion implantation, on PPP conductivity are investigated. The results showed that the conductivity of PPP can be improved 4～5 orders of magnitude by ion implantation and the conductivity of PPP can reach about 0.11 S·cm -1 by chemical doping. The comparison of stability of the material conductive behavior by using the two doping methods is presented. It shows that ion implantation is better than chemical doping in stabilizing the electric conductive behavior for the material.展开更多
A new organic semiconductor tartaric acid doped salt of emeraldine polyaniline (PANI-C 4H 6O 6) has been obtained by the method of oxidative polymerization of monomeric aniline with ammonium persulfate in acidic solut...A new organic semiconductor tartaric acid doped salt of emeraldine polyaniline (PANI-C 4H 6O 6) has been obtained by the method of oxidative polymerization of monomeric aniline with ammonium persulfate in acidic solution. The structure was characterized by Fourier Transform Infrared technique (FTIR) and X-ray diffraction (XRD). The temperature dependence dc conductivity δ dc ( T ) shows a semiconductor behavior and follows the quasi one dimensional variable range hopping (Q1D-VRH) model. Data on δ dc ( T ) are also discussed.展开更多
文摘Based on Verschueren’s Linguistic Adaptation Theory(1999)and Yu Guodong’s Linguistic Adaptation Model(2001),the present paper analyzes teachers’code-switching in both urban and rural junior middle schools from the pragmatic perspective of adaptation.
文摘Code-switching is considered as a strategy of cognition, interaction and teaching. Foreign language teachers often use code-switching as a skill of pedagogy to teach students to learn foreign language and promote their own teaching practice. Evidence shows that the proper sue of code-switching will promote English teaching practice, however, it is arguable that how to use native language to improve English teaching. This paper will discuss code-switching in Chinese English teaching with the SLA theories and put forward some guidance to teacher talk code-switching.
文摘This paper investigates the features of teacher talk by two secondary school English teachers by using Bourdieu's framework. Based on data analysis of two class recordings, this study argued that the experienced teacher was able to achieve her purpose by utilizing her cultural capital, while the less experienced teacher was less successful in claiming power and control due to her inadequate cultural capital and inappropriate code choice in the classroom. The study suggest that new teachers be advised on the potency of code selection to facilitate instruction.
文摘Polyparaphenylene(PPP) is prepared by AlCl 3-CuCl 2 catalysts with benzene as the monomer and is doped by chemical method and N + ion implantation. The influences of the concentration, temperature and time of chemical doping and the dose, energy and temperature of ion implantation, on PPP conductivity are investigated. The results showed that the conductivity of PPP can be improved 4～5 orders of magnitude by ion implantation and the conductivity of PPP can reach about 0.11 S·cm -1 by chemical doping. The comparison of stability of the material conductive behavior by using the two doping methods is presented. It shows that ion implantation is better than chemical doping in stabilizing the electric conductive behavior for the material.
文摘A new organic semiconductor tartaric acid doped salt of emeraldine polyaniline (PANI-C 4H 6O 6) has been obtained by the method of oxidative polymerization of monomeric aniline with ammonium persulfate in acidic solution. The structure was characterized by Fourier Transform Infrared technique (FTIR) and X-ray diffraction (XRD). The temperature dependence dc conductivity δ dc ( T ) shows a semiconductor behavior and follows the quasi one dimensional variable range hopping (Q1D-VRH) model. Data on δ dc ( T ) are also discussed.
