The highly efficient procedure has been developed for the synthesis of biodiesel from vegetable oil and methanol. The KF/MgO has been selected as the most efficient catalyst for the reactions with the yield of 99.3%. Operational simplicity, without need of the purification of raw vegetable oil,...

This paper treats an M/G/1 retrial queue with non-persistent customers, where the server is subject to failure due to the negative arrivals. After a completion of a service or a repair, the server searches for the customers in the orbit or remains idle. By using embedded Markov chain technique...

China's electricity sector has undergone several rounds of reforms since 1985, with which significant changes have been made. This paper provides a brief history of the archived and ongoing key policies for market reforms in China and Jiangsu Province. The market success and failure against this...