This paper carefully probes into the main models of the bilingual education in the world, deeply analyses the conditions and requirements on the implementation of the bilingual education in our schools, and clearly di...This paper carefully probes into the main models of the bilingual education in the world, deeply analyses the conditions and requirements on the implementation of the bilingual education in our schools, and clearly differentiates TEFL and TESL as well as bilingual education. The writer thinks that in China we teach English as a foreign language instead of a second language, that the bilingual education is the supreme level of the foreign language acquisition, and that the final goal of the bilingual education is to make learners simultaneously think and use Chinese and English in both ways as well as communicate with one another in two languages according to the situational context. Therefore, it is not easy to practice the bilingual education in a country like China, which is still poor in the English language context. But the situation will change as China enters WTO and the globalization speeds up.展开更多
Exact heteroclinic breather-wave solutions for Davey-Stewartson （DSI, DSII） system with periodic boundary condition are constructed using Hirota＇s bilinear form method and generalized ansatz method. The heteroclini...Exact heteroclinic breather-wave solutions for Davey-Stewartson （DSI, DSII） system with periodic boundary condition are constructed using Hirota＇s bilinear form method and generalized ansatz method. The heteroclinic structure of wave is investigated.展开更多
The light curve is one of the most important photometric characteristics of variable stars,which can supply physical information about many stars.So,light curves are the best candidate to inspect a theoretical model o...The light curve is one of the most important photometric characteristics of variable stars,which can supply physical information about many stars.So,light curves are the best candidate to inspect a theoretical model of binaries.One important feature of the light curve is the difference of two light minima of the light curve,namely the difference between the primary eclipse depth and the secondary eclipse depth(DED).In this paper,the secondary eclipse depths of theoretical and observational light curves are studied.Firstly,a method to calculate the theoretical light curves of an eclipsing binary with non-spherical components is proposed,which can be put into the HSB contact binary model [Huang R Q,et al.Chin J Astron Astrophys,2007,7:235-244;Song H F,et al.Chin J Astron Astrophys,2007,7:539-550].Theoretical light curves and the DED of the binary can be obtained at every evolutionary phase.The relationships of DED with mass and luminosity are presented and show special features for the contact binaries.Secondly,a large amount of observational data is collected,from which 11 massive,intermediate-mass contact binaries and 9 low-mass contact binaries are chosen and the two relationships are obtained using theoretical light curves.Finally,in order to check whether the HSB contact binary model can be used in contact binary systems with massive,intermediate-mass and low-mass components,a comparison is performed for the above mentioned relationships obtained from theoretical light curves with those from the astronomical observations.The results show a good agreement for contact binary systems with all different masses.展开更多
文摘This paper carefully probes into the main models of the bilingual education in the world, deeply analyses the conditions and requirements on the implementation of the bilingual education in our schools, and clearly differentiates TEFL and TESL as well as bilingual education. The writer thinks that in China we teach English as a foreign language instead of a second language, that the bilingual education is the supreme level of the foreign language acquisition, and that the final goal of the bilingual education is to make learners simultaneously think and use Chinese and English in both ways as well as communicate with one another in two languages according to the situational context. Therefore, it is not easy to practice the bilingual education in a country like China, which is still poor in the English language context. But the situation will change as China enters WTO and the globalization speeds up.
基金Supported by Chinese Natural Science Foundation under Grant No. 10661002Yunnan Natural Science Foundation under Grant No. 2006A0082M
文摘Exact heteroclinic breather-wave solutions for Davey-Stewartson （DSI, DSII） system with periodic boundary condition are constructed using Hirota＇s bilinear form method and generalized ansatz method. The heteroclinic structure of wave is investigated.
基金supported by the National Natural Science Foundation of China (Grant No. 10933002)
文摘The light curve is one of the most important photometric characteristics of variable stars,which can supply physical information about many stars.So,light curves are the best candidate to inspect a theoretical model of binaries.One important feature of the light curve is the difference of two light minima of the light curve,namely the difference between the primary eclipse depth and the secondary eclipse depth(DED).In this paper,the secondary eclipse depths of theoretical and observational light curves are studied.Firstly,a method to calculate the theoretical light curves of an eclipsing binary with non-spherical components is proposed,which can be put into the HSB contact binary model [Huang R Q,et al.Chin J Astron Astrophys,2007,7:235-244;Song H F,et al.Chin J Astron Astrophys,2007,7:539-550].Theoretical light curves and the DED of the binary can be obtained at every evolutionary phase.The relationships of DED with mass and luminosity are presented and show special features for the contact binaries.Secondly,a large amount of observational data is collected,from which 11 massive,intermediate-mass contact binaries and 9 low-mass contact binaries are chosen and the two relationships are obtained using theoretical light curves.Finally,in order to check whether the HSB contact binary model can be used in contact binary systems with massive,intermediate-mass and low-mass components,a comparison is performed for the above mentioned relationships obtained from theoretical light curves with those from the astronomical observations.The results show a good agreement for contact binary systems with all different masses.
