The network design problem we study in this paper is as follows. Given an undirected network, a set of origin-destination node pairs (commodities) and a demand for each commodity, the non-bifurcated network design problem is to install integer multiples of some capacity unit on the edges of the network and to route the commodities so that each commodity follows a single path. The objective is t...

Today’s local-area, mesh and cellular networks assign a single narrow-band channel to a node, and this assignment remains fixed over long time scales. Using network traces, we show that the load within a network can vary significantly even over short time scales on the order of tens of seconds. Therefore, we make the case for allocating spectrum ondemand to nodes and regions of the network that...

Research on demand-responsive collective transportation facilities that can act as feeder services to time-table based public transportation (PT) requires detailed and accurate information about the PT infrastructure, including the attachment of bus stops to the appropriate network link. Due to the size of the infrastructure, the data integration shall be automated. This paper describes the eff...

We consider a variant of the freight railcar flow problem. In this problem, we need 1) to choose a set of transportation demands between stations in a railroad network, and 2) to fulfill these demands by appropriately routing the set of available railcars, while maximizing the total profit. We formulate this problem as a multi-commodity flow problem in a large space-time graph. Three approaches...

The purpose of this article is to model and solve an integrated location, routing and inventory problem (LRIP) in cash-in-transit (CIT) sector. In real operation of cash transportation, to decrease total cost and to reduce risk of robbery of such high-value commodity. There must be substantial variation, making problem difficult to formulate. In this paper, to better fit real life applications ...

We investigate a multi-commodity capacitated facility location problem involving sustainability concerns (e.g., restrained carbon emission). In addition, this incorporates complementarity demand function. show that incorporation can lead to superior decisions both analytically and computationally. The resultant formulation is 0–1 mixed-integer non-concave quadratic program with equilibrium cons...

An optimization-based control framework that simultaneously determines the optimal inventory and product pricing policies is developed for multi-product, multi-echelon supply chain networks. The optimization problem aims at adjusting the available manufacturing resources, product transportation, inventories and prices for the entire supply chain network to satisfy demand while maximizing networ...

General equilibrium is investigated with N commodities deliverable at T dates traded spot and futures at 1⁄2 N 2T 3 dated commodity-pairwise trading posts. Trade is a resource-using activity recovering transaction costs through the spread between (bid) wholesale) and ask (retail) prices (pairwise rates of exchange). Budget constraints are enforced at each trading post separately implying demand...