Spectrum sharing with quality of service (QoS) requirement and power constraint on cognitive users is studied. The objective is to maximize the system throughput. This problem is modeled as a mixed integer nonlinear programming problem and then transformed to a continuous nonlinear programming problem through eliminating integer variables. We propose the joint power control and spectrum allocat...

The separation of solid particles from gas-solid process streams is an important unit operation in many chemical processes. Out the different types equipment that are used for separation, cyclone separators widely their operational flexibility, efficiency and capital cost. This study focused on design optimal configuration several cyclones a fertilizer plant. granulation step plant leads to usi...

Stanford News Service George B. Dantzig is well known as the father of linear programming. This “underestimates his paternal accomplishments” as is compellingly illustrated in the recent book [3] entitled The Basic George B. Dantzig. Dantzig made either fundamental or founding contributions in mathematical statistics, linear programming, network optimization, integer programming, nonlinear prog...