In this paper, we consider a stochastic serial inventory system with dual delivery/supply modes for each echelon stage. The two modes in each stage take different lead times, incur different ordering costs and require different base order batch sizes. We study a class of dual-index...

Soil-bentonite cut-off walls are widely used in landfill projects. In recent years, attapulgite has been suggested as a substitute for bentonite in cut-off wall applications by scholars due to its distinct advantages over bentonite. However, the biochemical degradation of waste in landfills...

In most of the macroeconomic models, the concept of representative agent is adopted. The aggregate economy is a simple combination of a large amount of these identical agents. Individuals are thought to have no power in influencing the performance of aggregate economy, especially the prices in...