In this paper, we present an access network design problem with end-to-end quality of service (QoS) requirement. The problem can be conceptualized as a two-level hierarchical location-allocation problem on the tree topology with nonlinear side constraints. The objective function of the nonlinear...

In this paper, we address the issues of coal supply and blending pertaining to an electric utility company in Taiwan. Since the fuel used by coal-fired power plants are mainly imported in bulk from overseas sources, the planning of coal shipping and blending is of great economic importance. This...