With the development of society and economy,more and more talents capable persons are badly needed in the world.Under the influence of traditional English teaching mode,most English learners can only read and write.Th...With the development of society and economy,more and more talents capable persons are badly needed in the world.Under the influence of traditional English teaching mode,most English learners can only read and write.They are usually called "deaf-mutes".Therefore,traditional English teaching mode isn't satisfied by the teachers and received greatly challenged.Due to applying multimedia to English teaching could create more authentic language environment for the learners,which enables them to communicate in English in real-life situations.At present,the multi-media approach is the most popular language teaching method in the world.The most effective way to develop the teaching is combine multimedia with the traditional methods.This is of special significance to English teaching and make the English teaching receiving the best effect.展开更多
衔接对于一篇文章的连续性有重要的作用。对于作者是否能够表达清楚,读者是否能够了解作者的意图,整篇文章是否能够行文流畅,有着举足轻重的作用。早在1976年,haliday和hasan共同著作了《英语的衔接》(《Cohesion in English》)一书,全...衔接对于一篇文章的连续性有重要的作用。对于作者是否能够表达清楚,读者是否能够了解作者的意图,整篇文章是否能够行文流畅,有着举足轻重的作用。早在1976年,haliday和hasan共同著作了《英语的衔接》(《Cohesion in English》)一书,全面研究了英语语言系统中各种衔接方式。haliday和hasan将衔接概括成五种形式:①词汇衔接(lexical cohesion),②连接词(conjunction),③省略(ellipsis),④照应(reference),⑤替代(substitution)。其中省略、替代、连接,照应属于语法范畴,词汇属于词汇衔接范畴。笔者就以上述这五种形式为理论依托,通过具体例证来剖析各自衔接的差异。展开更多
Real-time monitoring of wavelength is important for high-speed wavelength phase-shifting interferometry.In this paper,a wavelength sensor based on a polarization-maintaining fiber interferometer with four-quadrant dem...Real-time monitoring of wavelength is important for high-speed wavelength phase-shifting interferometry.In this paper,a wavelength sensor based on a polarization-maintaining fiber interferometer with four-quadrant demodulation was proposed.We built the wavelength sensing system with resolution better than 0.005 pm and 0.1 ms sampling interval and measured the response time of the tuned wavelength at 35 ms in the phase-shifting process of a commercial wavelength phase-shifting free-space interferometer,as well as the wavelength drift velocity of 0.01 pm per second in the hysteresis process.The optical fiber wavelength sensor with four-quadrant demodulation provides a real-time wavelength sensing scheme for high-speed wavelength phase-shifting interferometers.展开更多
文摘With the development of society and economy,more and more talents capable persons are badly needed in the world.Under the influence of traditional English teaching mode,most English learners can only read and write.They are usually called "deaf-mutes".Therefore,traditional English teaching mode isn't satisfied by the teachers and received greatly challenged.Due to applying multimedia to English teaching could create more authentic language environment for the learners,which enables them to communicate in English in real-life situations.At present,the multi-media approach is the most popular language teaching method in the world.The most effective way to develop the teaching is combine multimedia with the traditional methods.This is of special significance to English teaching and make the English teaching receiving the best effect.
文摘衔接对于一篇文章的连续性有重要的作用。对于作者是否能够表达清楚,读者是否能够了解作者的意图,整篇文章是否能够行文流畅,有着举足轻重的作用。早在1976年,haliday和hasan共同著作了《英语的衔接》(《Cohesion in English》)一书,全面研究了英语语言系统中各种衔接方式。haliday和hasan将衔接概括成五种形式:①词汇衔接(lexical cohesion),②连接词(conjunction),③省略(ellipsis),④照应(reference),⑤替代(substitution)。其中省略、替代、连接,照应属于语法范畴,词汇属于词汇衔接范畴。笔者就以上述这五种形式为理论依托,通过具体例证来剖析各自衔接的差异。
基金This work was supported by the Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX21_0277)the National Natural Science Foundation of China(No.61875087).
文摘Real-time monitoring of wavelength is important for high-speed wavelength phase-shifting interferometry.In this paper,a wavelength sensor based on a polarization-maintaining fiber interferometer with four-quadrant demodulation was proposed.We built the wavelength sensing system with resolution better than 0.005 pm and 0.1 ms sampling interval and measured the response time of the tuned wavelength at 35 ms in the phase-shifting process of a commercial wavelength phase-shifting free-space interferometer,as well as the wavelength drift velocity of 0.01 pm per second in the hysteresis process.The optical fiber wavelength sensor with four-quadrant demodulation provides a real-time wavelength sensing scheme for high-speed wavelength phase-shifting interferometers.
