A support vector rule based method is investigated for the construction of motion controllers via natural language training. It is a two-phase process including motion control information collection from natural langu...A support vector rule based method is investigated for the construction of motion controllers via natural language training. It is a two-phase process including motion control information collection from natural language instructions, and motion information condensation with the aid of support vector machine （SVM） theory. Self-organizing fuzzy neural networks are utilized for the collection of control rules, from which support vector rules are extracted to form a final controller to achieve any given control accuracy. In this way, the number of control rules is reduced, and the structure of the controller tidied, making a controller constructed using natural language training more appropriate in practice, and providing a fundamental rule base for high-level robot behavior control. Simulations and experiments on a wheeled robot are carried out to illustrate the effectiveness of the method.展开更多
EFL （English as a Foreign Language） speaking is a very demanding skill that requires learners＇ socio-pragmatic as well as strategic competence in any interactional situation, and lexis proves to play a crucial role...EFL （English as a Foreign Language） speaking is a very demanding skill that requires learners＇ socio-pragmatic as well as strategic competence in any interactional situation, and lexis proves to play a crucial role in this process. However, few studies have investigated how both EFL teachers and learners view and analyze situations in which learners are not producing enough spoken language in class, and the reasons behind them. The present study will pinpoint the significant role of lexis in Moroccan learners＇ speaking production. To this end, 40 EFL teachers and 200 Moroccan high school students are surveyed and interviewed to reveal their perceptions of the speaking skill and the corresponding high significance of lexis in this instance. Results show that both teachers and learners identify vocabulary deficiency as the main factor behind students＇ inability to speak English. In the present paper, among the many suggestions that could be proposed to deal with this situation, it is argued that one efficient way would be to assist the students during the process of L2 （second language） vocabulary learning through vocabulary learning strategy instruction. Pedagogical and research implication will be given in response to the difficulties encountered in this area as have been identified by the EFL teachers and learners surveyed.展开更多
基金This work was partially supported by the Royal Society of UK and the National Natural Science Foundation of PRC (No. 60175028).
文摘A support vector rule based method is investigated for the construction of motion controllers via natural language training. It is a two-phase process including motion control information collection from natural language instructions, and motion information condensation with the aid of support vector machine （SVM） theory. Self-organizing fuzzy neural networks are utilized for the collection of control rules, from which support vector rules are extracted to form a final controller to achieve any given control accuracy. In this way, the number of control rules is reduced, and the structure of the controller tidied, making a controller constructed using natural language training more appropriate in practice, and providing a fundamental rule base for high-level robot behavior control. Simulations and experiments on a wheeled robot are carried out to illustrate the effectiveness of the method.
文摘EFL （English as a Foreign Language） speaking is a very demanding skill that requires learners＇ socio-pragmatic as well as strategic competence in any interactional situation, and lexis proves to play a crucial role in this process. However, few studies have investigated how both EFL teachers and learners view and analyze situations in which learners are not producing enough spoken language in class, and the reasons behind them. The present study will pinpoint the significant role of lexis in Moroccan learners＇ speaking production. To this end, 40 EFL teachers and 200 Moroccan high school students are surveyed and interviewed to reveal their perceptions of the speaking skill and the corresponding high significance of lexis in this instance. Results show that both teachers and learners identify vocabulary deficiency as the main factor behind students＇ inability to speak English. In the present paper, among the many suggestions that could be proposed to deal with this situation, it is argued that one efficient way would be to assist the students during the process of L2 （second language） vocabulary learning through vocabulary learning strategy instruction. Pedagogical and research implication will be given in response to the difficulties encountered in this area as have been identified by the EFL teachers and learners surveyed.
