Influence of identical applied initial pressures on the radial surfaces of a hollow cylinder which is compose of materials with first power hypo-elastic constitutive model was investigated.The basic equations of the p...Influence of identical applied initial pressures on the radial surfaces of a hollow cylinder which is compose of materials with first power hypo-elastic constitutive model was investigated.The basic equations of the problem were built up based on the framework of piecewise homogeneous body model with the use of three-dimensional linearized theory of elastic waves in initially stressed bodies(TLTEWISB).With the method proposed previously,this problem was then solved numerically.Moreover,the dispersion group velocity of the lowest order mode with different initial pressures was also studied.It can be concluded that the initial pressure and the geometry parameters will induce considerable changes of different degrees in dispersive relation between phase velocity and wave number in opposite trend(positive in initial pressure and negative in thickness).展开更多
To develop the students' communicative competence in order to be qualified in their future work (the seafarer's post) is the major educational aim in the field of Maritime. This paper summarizes some useful an...To develop the students' communicative competence in order to be qualified in their future work (the seafarer's post) is the major educational aim in the field of Maritime. This paper summarizes some useful and efficient methods and practices to make teaching more effective and to help students learn better on the basis of integrated teaching approaches, especially, the CBI, the communicative approach, the natural approach. Language is being taught depend on the students' analysis. Successful learning should be learner-centered and in real-life communication. Teacher needs to supply authentic materials, good comprehensible input and low the affective filter to motivate the students learning. Moreover, teacher is suggested to establish an English-learning environment via learning English through English and teaching English through English.展开更多
In nonlinear physics, the modified Korteweg de-Vries （mKdV） as one of the important equation of nonfinear partial differential equations, its various solutions have been found by many methods. In this paper, the CRE...In nonlinear physics, the modified Korteweg de-Vries （mKdV） as one of the important equation of nonfinear partial differential equations, its various solutions have been found by many methods. In this paper, the CRE method is presented for constructing new exact solutions. In addition to the new solutions of the mKdV equation, the consistent Riccati expansion （CRE） method can unearth other equations.展开更多
In the present work, the new exact solutions of the Boiti-Leon-Pempinelli system have been found. The system has extensive physical background. The exact solutions of the Boiti-Leon-Pempinelli system are investigated ...In the present work, the new exact solutions of the Boiti-Leon-Pempinelli system have been found. The system has extensive physical background. The exact solutions of the Boiti-Leon-Pempinelli system are investigated using similarity transformation method via Lie group theory. Lie symmetry generators are used for constructing similarity variables for the given system of partial differential equations, which lead to the new system of partial differentiaJ equations with one variable less at each step and eventually to a system of ordinary differential equations （ODEs）. Finally, these ODEs are solved exactly. The exact solutions are obtained under some parametric restrictions. The elastic behavior of the soliton solutions is shown graphically by taking some appropriate choices of the arbitrary functions involved in the solutions.展开更多
基金Project(51378463)supported by National Natural Science Foundation of China
文摘Influence of identical applied initial pressures on the radial surfaces of a hollow cylinder which is compose of materials with first power hypo-elastic constitutive model was investigated.The basic equations of the problem were built up based on the framework of piecewise homogeneous body model with the use of three-dimensional linearized theory of elastic waves in initially stressed bodies(TLTEWISB).With the method proposed previously,this problem was then solved numerically.Moreover,the dispersion group velocity of the lowest order mode with different initial pressures was also studied.It can be concluded that the initial pressure and the geometry parameters will induce considerable changes of different degrees in dispersive relation between phase velocity and wave number in opposite trend(positive in initial pressure and negative in thickness).
文摘To develop the students' communicative competence in order to be qualified in their future work (the seafarer's post) is the major educational aim in the field of Maritime. This paper summarizes some useful and efficient methods and practices to make teaching more effective and to help students learn better on the basis of integrated teaching approaches, especially, the CBI, the communicative approach, the natural approach. Language is being taught depend on the students' analysis. Successful learning should be learner-centered and in real-life communication. Teacher needs to supply authentic materials, good comprehensible input and low the affective filter to motivate the students learning. Moreover, teacher is suggested to establish an English-learning environment via learning English through English and teaching English through English.
基金Supported by the National Natural Science Foundation of China under Grant No.11175092Scientific Research Fund of Zhejiang Provincial Education Department under Grant No.Y201017148K.C.Wong Magna Fund in Ningbo University
文摘In nonlinear physics, the modified Korteweg de-Vries （mKdV） as one of the important equation of nonfinear partial differential equations, its various solutions have been found by many methods. In this paper, the CRE method is presented for constructing new exact solutions. In addition to the new solutions of the mKdV equation, the consistent Riccati expansion （CRE） method can unearth other equations.
文摘In the present work, the new exact solutions of the Boiti-Leon-Pempinelli system have been found. The system has extensive physical background. The exact solutions of the Boiti-Leon-Pempinelli system are investigated using similarity transformation method via Lie group theory. Lie symmetry generators are used for constructing similarity variables for the given system of partial differential equations, which lead to the new system of partial differentiaJ equations with one variable less at each step and eventually to a system of ordinary differential equations （ODEs）. Finally, these ODEs are solved exactly. The exact solutions are obtained under some parametric restrictions. The elastic behavior of the soliton solutions is shown graphically by taking some appropriate choices of the arbitrary functions involved in the solutions.
