[Objective] To examine the grammar model based on lexical substring exac- tion for RNA secondary structure prediction. [Method] By introducing cloud model into stochastic grammar model, a machine learning algorithm su...[Objective] To examine the grammar model based on lexical substring exac- tion for RNA secondary structure prediction. [Method] By introducing cloud model into stochastic grammar model, a machine learning algorithm suitable for the lexicalized stochastic grammar model was proposed. The word grid mode was used to extract and divide RNA sequence to acquire lexical substring, and the cloud classifier was used to search the maximum probability of each lemma which was marked as a certain sec- ondary structure type. Then, the lemma information was introduced into the training stochastic grammar process as prior information, realizing the prediction on the sec- ondary structure of RNA, and the method was tested by experiment. [Result] The experimental results showed that the prediction accuracy and searching speed of stochastic grammar cloud model were significantly improved from the prediction with simple stochastic grammar. [Conclusion] This study laid the foundation for the wide application of stochastic grammar model for RNA secondary structure prediction.展开更多
China English is an English variety The paper, on the basis of the study of Asian characteristics of China English. influenced by Chinese culture and the way of Chinese thinking. English varieties, tries to describe a...China English is an English variety The paper, on the basis of the study of Asian characteristics of China English. influenced by Chinese culture and the way of Chinese thinking. English varieties, tries to describe and explain the lexical展开更多
Every language possesses three cardinal elements： phonetic element, lexical element, and grammatical structure, of which lexis is the fundamental pillar that supports the huge system of a language. The close relation...Every language possesses three cardinal elements： phonetic element, lexical element, and grammatical structure, of which lexis is the fundamental pillar that supports the huge system of a language. The close relationship between language and culture is most readily seen in words. In fact, being the most active and elastic element of a language, vocabulary has the greatest culture-loading capacity. Vocabulary teaching is an integral part of foreign language teaching. Its efficiency has a direct relation with the development of the learners＇ communicative competence. Vocabulary is culture-bound, so it is self-evident that culture introduction is indispensable in teaching. The author attempts to make a comparison between English and Chinese cultures, to make clear how cultural disparities exist in English and Chinese vocabulary, and to put forward some constructive suggestions on how to integrate culture into vocabulary teaching in Chinese schools, so as to promote the efficiency of vocabulary teaching and improve learners＇ competence in intercultural communication.展开更多
Compared structural approach with communicative approach, the former puts too much emphasis on linguistic knowledge and neglects the language application, while the latter lays too much emphasis on the communicative c...Compared structural approach with communicative approach, the former puts too much emphasis on linguistic knowledge and neglects the language application, while the latter lays too much emphasis on the communicative classroom activities and neglects the systematic study of linguistic knowledge. Both of them cannot meet the requirements of improving the non-English major students＇ argumentative writing scores. So based on the Lexical Approach theory, taking the College English Integrated Course 4 （LI, 2003） as the main teaching material and lexical phrases as teaching and learning units, this study explores the effectiveness of the Lexical Approach in improving non-English major students＇ argumentative writing through classroom activities of input, absorption, and output of lexical phrases. The results show that lexical phrases have more effects on students＇ English competence than single words. They can help to improve the argumentative writing scores and cultivate an interest in learning English independently.展开更多
基金Supported by the Science Foundation of Hengyang Normal University of China(09A36)~~
文摘[Objective] To examine the grammar model based on lexical substring exac- tion for RNA secondary structure prediction. [Method] By introducing cloud model into stochastic grammar model, a machine learning algorithm suitable for the lexicalized stochastic grammar model was proposed. The word grid mode was used to extract and divide RNA sequence to acquire lexical substring, and the cloud classifier was used to search the maximum probability of each lemma which was marked as a certain sec- ondary structure type. Then, the lemma information was introduced into the training stochastic grammar process as prior information, realizing the prediction on the sec- ondary structure of RNA, and the method was tested by experiment. [Result] The experimental results showed that the prediction accuracy and searching speed of stochastic grammar cloud model were significantly improved from the prediction with simple stochastic grammar. [Conclusion] This study laid the foundation for the wide application of stochastic grammar model for RNA secondary structure prediction.
文摘China English is an English variety The paper, on the basis of the study of Asian characteristics of China English. influenced by Chinese culture and the way of Chinese thinking. English varieties, tries to describe and explain the lexical
文摘Every language possesses three cardinal elements： phonetic element, lexical element, and grammatical structure, of which lexis is the fundamental pillar that supports the huge system of a language. The close relationship between language and culture is most readily seen in words. In fact, being the most active and elastic element of a language, vocabulary has the greatest culture-loading capacity. Vocabulary teaching is an integral part of foreign language teaching. Its efficiency has a direct relation with the development of the learners＇ communicative competence. Vocabulary is culture-bound, so it is self-evident that culture introduction is indispensable in teaching. The author attempts to make a comparison between English and Chinese cultures, to make clear how cultural disparities exist in English and Chinese vocabulary, and to put forward some constructive suggestions on how to integrate culture into vocabulary teaching in Chinese schools, so as to promote the efficiency of vocabulary teaching and improve learners＇ competence in intercultural communication.
文摘Compared structural approach with communicative approach, the former puts too much emphasis on linguistic knowledge and neglects the language application, while the latter lays too much emphasis on the communicative classroom activities and neglects the systematic study of linguistic knowledge. Both of them cannot meet the requirements of improving the non-English major students＇ argumentative writing scores. So based on the Lexical Approach theory, taking the College English Integrated Course 4 （LI, 2003） as the main teaching material and lexical phrases as teaching and learning units, this study explores the effectiveness of the Lexical Approach in improving non-English major students＇ argumentative writing through classroom activities of input, absorption, and output of lexical phrases. The results show that lexical phrases have more effects on students＇ English competence than single words. They can help to improve the argumentative writing scores and cultivate an interest in learning English independently.
