Ionic polymer-metal composite （IPMC） is a type of electroactive polymer （EAP）. In this paper, based on Nemat-Nasser model, an improved model is developed to explain the initial nonlinear response of electric actua...Ionic polymer-metal composite （IPMC） is a type of electroactive polymer （EAP）. In this paper, based on Nemat-Nasser model, an improved model is developed to explain the initial nonlinear response of electric actuation on the fixed end deformation. Three IPMC strip samples with different surface resistance are chosen for analysis. Further, from simulation and experiment results, it is found that the root deformation made the tip movement of the IPMC strip with little surface resistance, but this effect was less and less when the surface resistance reduced. The calculation results of this model for the fixed end show a more accurate simulation for the actual deformation of IPMC strips.展开更多
English for Specific Purposes(ESP) is an inevitable trend for reform of college English teaching. The paper is on the basis of theories on ESP teaching. Based on extensive investigation, it analyzes the main problems ...English for Specific Purposes(ESP) is an inevitable trend for reform of college English teaching. The paper is on the basis of theories on ESP teaching. Based on extensive investigation, it analyzes the main problems in current college English teaching which is EGP-oriented(English for General Purpose) and the necessity of teaching model"EGP + ESP"is demonstrated in this paper. Moreover, it discusses specific measures on how to conduct teaching reform on the combination of"EGP and ESP"from five aspects including faculty construction, selection of teaching materials, curriculum design, teaching model, evaluation system in order to change students' general dissatisfaction for college English teaching and achieve the goal to cultivate interdisciplinary talents of foreign language for society.展开更多
基金国家重点基础研究发展规划(973)(the National Grand Fundamental Research 973 Program of China under Grant No.2007CB307102)河南省教育厅自然基金(the Natural Science of Foundation of Education Department of Henan Province of China under Grant No. 2006520019)
基金Funded by the National Natural Science Foundation of China(Nos.50735002,50875123,and 90816003)the 111 Project(No.B12021)
文摘Ionic polymer-metal composite （IPMC） is a type of electroactive polymer （EAP）. In this paper, based on Nemat-Nasser model, an improved model is developed to explain the initial nonlinear response of electric actuation on the fixed end deformation. Three IPMC strip samples with different surface resistance are chosen for analysis. Further, from simulation and experiment results, it is found that the root deformation made the tip movement of the IPMC strip with little surface resistance, but this effect was less and less when the surface resistance reduced. The calculation results of this model for the fixed end show a more accurate simulation for the actual deformation of IPMC strips.
文摘English for Specific Purposes(ESP) is an inevitable trend for reform of college English teaching. The paper is on the basis of theories on ESP teaching. Based on extensive investigation, it analyzes the main problems in current college English teaching which is EGP-oriented(English for General Purpose) and the necessity of teaching model"EGP + ESP"is demonstrated in this paper. Moreover, it discusses specific measures on how to conduct teaching reform on the combination of"EGP and ESP"from five aspects including faculty construction, selection of teaching materials, curriculum design, teaching model, evaluation system in order to change students' general dissatisfaction for college English teaching and achieve the goal to cultivate interdisciplinary talents of foreign language for society.
