One of the primary concerns in any system design problem is to prepare a highly reliable system with minimum cost. One way to increase the reliability of systems is to use redundancy in different forms such as active or standby. In this paper, a new nonlinear multi- objective integer programming model with the choice of redundancy strategy and component type is developed where standby strategy ...

At the interface between airport airside and landside operations, assignment of flights to gates is key ensure efficient operations a high quality service for passengers. We propose mixed-integer linear program an integrated flight-to-gate that considers both as well constraints on capabilities facilities such check-in, security or transfer handle Moreover, our robust in it constrains probabili...

Line balancing problems consist on assigning tasks to stations and/or workers in a restricted way. Most models deal with simple versions of this problem not taking into account real world restrictions. In this paper we present a new re-balancing model that takes into account assignment restrictions and builds the variable sets in a more efficient way. The model also takes into consideration wor...

This paper incorporates assignment frictions and sector-specific training into the Roy model of occupational choice. Assignment frictions represent the extent of the market whereas differences in sector-specific training reflect worker specialization. This framework thus captures Adam Smith’s idea that the extent of the market determines the division of labor. The paper demonstrates the way in ...

Interval Assignment (IA) is the problem of assigning an integer number of mesh edges, intervals, to each curve so that the assigned value is close to the goal value, and all containing surfaces and volumes may be meshed independently and compatibly. Sum-even constraints are modeled by an integer variable with no goal. My new method NLIA solves IA more quickly than the prior lexicographic min-ma...

In today's competitive market, quality has an important role in manufacturing system. The manufacturers attempt to maintain their production system in a proper condition to produce high quality products. One of the key factors to achieve this goal is maintenance policy. Most studies on maintenance focused on machines and less attention has been paid to human resources as the most important fact...

This paper considers the problem of capacity planning and operation of energy grids where the power demands are served from renewable energy sources, such as wind farms, and the transmission network is represented by the High-Voltage Direct Current (HVDC) lines. The principal question considered in this work is whether a risk-averse design of the grid, including the selection of wind farm locat...

We consider the routing and wavelength assignment (RWA) in survivable WDM network. A path protection scheme assumed and two different wavelength assignment methods for protection paths are considered. Integer programming formulations of RWA under two wavelength assignment methods are proposed and we devised algorithms to solve them. Test results show that the difference of wavelength requiremen...