Investigation of Heat Dissipation of Power Cable Laid in the Tunnel with Ventilation
To increase the current carrying capacity of the power cable, more and more power tunnel are installed with ventilation. Hence in the paper the heat dissipation of power cable is investigated. Firstly the model to calculate the thermal field of power cable with natural ventilation is presented based on the fluid mechanics and heat transfer, and the governing equations and boundary conditions are inferred. Then the thermal field for six-loop cables in power tunnel was calculated, which verified the accuracy of the model. In addition, the factors influencing the thermal field with ventilation is investigated, including the size of the power tunnel, the distance between the cable. Finally the current carrying capacity of the power cable is calculated and the economic benefit of the operation mode of power cable is analyzed.
The Convergence Order of Newton Secant Method Predictor-Corrector Iterative Form
This paper discusses P.C.Iterative Form of Newton Secant Method as follows:P(Predictor):_(k+1)=x_k-(x_k-x_(k-1))f(x_k)[]f(x_k)-f(x_(k-1))C(Corrector):x_(k+1)=x_k-(_(k+1)-x_k)f(x_k)[]f(_(k+1))-f(x_k),and proved its order of convergence to be 2.618.
Politics of Judicial Independence and Judicial Accountability in Czechia: Bargaining in the Shadow of the Law between Court Presidents and the Ministry of Justice
Judicial independence – Judicial accountability – Court presidents – Judicial politics – Separation of powers – Court administration – Judicial councils – Selection of judges – Czechia – Central Europe