In view of the current demand for skilled talents required by the Chinese construction industry,this paper takes the Jiuzhou Polytechnic of Xuzhou,Jiangsu Province as an example and puts forward the apprenticeship tra...In view of the current demand for skilled talents required by the Chinese construction industry,this paper takes the Jiuzhou Polytechnic of Xuzhou,Jiangsu Province as an example and puts forward the apprenticeship training model of“dual system,four stages of work integrated learning,”with the characteristics of vocational education from China Jiuzhou Polytechnic along with its paid study courses.展开更多
Referring to the construction way of Lax-Wendroff scheme, new IRS (Implicit Residual Smoothing) schemes have been developed for hyperbolic, parabolic and hyperparabolic equations. These IRS schemes have 2nd-order or 3...Referring to the construction way of Lax-Wendroff scheme, new IRS (Implicit Residual Smoothing) schemes have been developed for hyperbolic, parabolic and hyperparabolic equations. These IRS schemes have 2nd-order or 3 rd-order time accuracy, and can extend the stability region of basic explicit time-stepping scheme greatly and thus can permit higher CFL number in the calculation of flow field. The, central smoothing and upwind-bias smoothing techniques have been developed tao. Based on one-dimensional linear model equation, it has been found that the scheme is unconditionally stable according to the von-Neumann analysis. The limitation of Dawes' method, which has been applied in turbomachinery widespreadly, has been discussed on solving steady flow and viscous flow. It is shown that stable solution of this method is not completely independent with the value of time step. In the end, numerical results by using IRS schemes and Dawes' method as well as TVD ( total variation diminishing) scheme and four-stage Runge-Kutta technique are presented to verify, the analytical conclusions.展开更多
文摘In view of the current demand for skilled talents required by the Chinese construction industry,this paper takes the Jiuzhou Polytechnic of Xuzhou,Jiangsu Province as an example and puts forward the apprenticeship training model of“dual system,four stages of work integrated learning,”with the characteristics of vocational education from China Jiuzhou Polytechnic along with its paid study courses.
文摘Referring to the construction way of Lax-Wendroff scheme, new IRS (Implicit Residual Smoothing) schemes have been developed for hyperbolic, parabolic and hyperparabolic equations. These IRS schemes have 2nd-order or 3 rd-order time accuracy, and can extend the stability region of basic explicit time-stepping scheme greatly and thus can permit higher CFL number in the calculation of flow field. The, central smoothing and upwind-bias smoothing techniques have been developed tao. Based on one-dimensional linear model equation, it has been found that the scheme is unconditionally stable according to the von-Neumann analysis. The limitation of Dawes' method, which has been applied in turbomachinery widespreadly, has been discussed on solving steady flow and viscous flow. It is shown that stable solution of this method is not completely independent with the value of time step. In the end, numerical results by using IRS schemes and Dawes' method as well as TVD ( total variation diminishing) scheme and four-stage Runge-Kutta technique are presented to verify, the analytical conclusions.
