At present, as the development of vocational education speeds up and its scale is expanded gradually, many problems begin to arise from classroom teaching in higher vocational colleges. In order to improve the classro...At present, as the development of vocational education speeds up and its scale is expanded gradually, many problems begin to arise from classroom teaching in higher vocational colleges. In order to improve the classroom teaching quality in higher vocational colleges, countermeasures should be proposed. Based on the classroom teaching environment and means in higher vocational colleges, this paper discusses problems in classroom teaching and also countermeasures.展开更多
The market competition is more and more complicated and the employment situation is more severe, which makes innovation and entrepreneurship ability become the way of survival of university students. How to cultivate ...The market competition is more and more complicated and the employment situation is more severe, which makes innovation and entrepreneurship ability become the way of survival of university students. How to cultivate entrepreneurial competence for colleges and universities is worth of caring and considering. The paper researches the cultivation of entrepreneurial competence of vocational college students and proposes the opinions to improve the entrepreneurial competence of Vocational college students.展开更多
Higher vocational English teaching is a kind of education discipline which is more inclined to occupation and technology, whose basic teaching export is to lay foundation for their future employment. In terms of the s...Higher vocational English teaching is a kind of education discipline which is more inclined to occupation and technology, whose basic teaching export is to lay foundation for their future employment. In terms of the social environment of the new period, along with the continuous improvement of the national open economic environment, the society pays more attention to the wide application of the tool of the English language. Therefore, in order to meet the needs of society, to lay a more favorable foundation of knowledge for the students is an important part of English teaching in Higher Vocational Colleges in the new period. This article first analyzes the importance of English teaching reform in higher vocational education, and then analyzes the direction of curriculum reform from the angle of theory, and puts forward the concrete reform strategies.展开更多
Ultrasonic assisted friction stir welding （UAFSW） is a recent modification of conventional friction stir welding, which adds ultrasonic energy directly into the friction stir welding area by the pin. In this study, ...Ultrasonic assisted friction stir welding （UAFSW） is a recent modification of conventional friction stir welding, which adds ultrasonic energy directly into the friction stir welding area by the pin. In this study, 2A12 aluminum alloy was welded by this process and conventional, respectively. The tensile tests, microstructure and fracture surface of FSW joint and UAFSW joint were analyzed. The research results show that the surface forming texture of ultrasonic assisted friction stir welding joint, compared with conventional, is finer and more uniform, showing metallic matte color. The grains are much finer in weld nugget zone, thermo-mechanically affected zone and heat-affected zone; S-phase particles size is much smaller and distribution is more homogeneous in the matrix. The tensile strength of UAFSW joint is 94. 13% of base metal, and the elongation is 11.77%. The tensile strength of FSW joint is 83.15% of base metal, and the elongation is 8.81%. The tests results reveal that ultrasonic vibration can improve the tensile strength and the elongation of welded joints.展开更多
An interpolation method was used to solve the Volterra integral equation of the second kind caused by interaction among thermal, electric and mechanical fields. The exact expressions for the transient responses of str...An interpolation method was used to solve the Volterra integral equation of the second kind caused by interaction among thermal, electric and mechanical fields. The exact expressions for the transient responses of stresses, electric displacement and electric potential in an orthotropic piezoelectric hollow cylinder were obtained by means of the finite integral transforms. From the sample numerical calculations, it is seen that the present method is suitable for an orthotropic piezoelectric hollow cylinder subjected to arbitrary thermal shock, mechanical load and transient electric excitation. The result can be used as a reference to solve other transient coupled problems of thermo-electro-elasticity.展开更多
文摘At present, as the development of vocational education speeds up and its scale is expanded gradually, many problems begin to arise from classroom teaching in higher vocational colleges. In order to improve the classroom teaching quality in higher vocational colleges, countermeasures should be proposed. Based on the classroom teaching environment and means in higher vocational colleges, this paper discusses problems in classroom teaching and also countermeasures.
文摘The market competition is more and more complicated and the employment situation is more severe, which makes innovation and entrepreneurship ability become the way of survival of university students. How to cultivate entrepreneurial competence for colleges and universities is worth of caring and considering. The paper researches the cultivation of entrepreneurial competence of vocational college students and proposes the opinions to improve the entrepreneurial competence of Vocational college students.
文摘Higher vocational English teaching is a kind of education discipline which is more inclined to occupation and technology, whose basic teaching export is to lay foundation for their future employment. In terms of the social environment of the new period, along with the continuous improvement of the national open economic environment, the society pays more attention to the wide application of the tool of the English language. Therefore, in order to meet the needs of society, to lay a more favorable foundation of knowledge for the students is an important part of English teaching in Higher Vocational Colleges in the new period. This article first analyzes the importance of English teaching reform in higher vocational education, and then analyzes the direction of curriculum reform from the angle of theory, and puts forward the concrete reform strategies.
文摘Ultrasonic assisted friction stir welding （UAFSW） is a recent modification of conventional friction stir welding, which adds ultrasonic energy directly into the friction stir welding area by the pin. In this study, 2A12 aluminum alloy was welded by this process and conventional, respectively. The tensile tests, microstructure and fracture surface of FSW joint and UAFSW joint were analyzed. The research results show that the surface forming texture of ultrasonic assisted friction stir welding joint, compared with conventional, is finer and more uniform, showing metallic matte color. The grains are much finer in weld nugget zone, thermo-mechanically affected zone and heat-affected zone; S-phase particles size is much smaller and distribution is more homogeneous in the matrix. The tensile strength of UAFSW joint is 94. 13% of base metal, and the elongation is 11.77%. The tensile strength of FSW joint is 83.15% of base metal, and the elongation is 8.81%. The tests results reveal that ultrasonic vibration can improve the tensile strength and the elongation of welded joints.
文摘An interpolation method was used to solve the Volterra integral equation of the second kind caused by interaction among thermal, electric and mechanical fields. The exact expressions for the transient responses of stresses, electric displacement and electric potential in an orthotropic piezoelectric hollow cylinder were obtained by means of the finite integral transforms. From the sample numerical calculations, it is seen that the present method is suitable for an orthotropic piezoelectric hollow cylinder subjected to arbitrary thermal shock, mechanical load and transient electric excitation. The result can be used as a reference to solve other transient coupled problems of thermo-electro-elasticity.
