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Now showing items 11-20 of 21
A model for enhancing robustness of aircraft and passenger connections
(
Elsevier
, 2013 , Article)
Airlines schedules are often subject to various uncontrollable factors that cause disruptions and delays. These delays not only constitute, for many passengers, the painful part of air travel, but also represent for airlines ...
Enhanced compact models for the connected subgraph problem and for the shortest path problem in digraphs with negative cycles
(2013 , Article)
We investigate the minimum-weight connected subgraph problem. The importance of this problem stems from the fact that it constitutes the backbone of many network design problems having applications in several areas including ...
Improved bounds for hybrid flow shop scheduling with multiprocessor tasks
(2013 , Article)
In this paper, we investigate the problem of minimizing makespan in a multistage hybrid flow-shop scheduling with multiprocessor tasks. To generate high-quality approximate solutions to this challenging NP-hard problem, ...
A branch-and-price algorithm for the two-stage guillotine cutting stock problem
(
Palgrave Macmillan Ltd.
, 2013 , Article)
We investigate the two-stage guillotine two-dimensional cutting stock problem. This problem commonly arises in the industry when small rectangular items need to be cut out of large stock sheets. We propose an integer ...
A lifted compact formulation for the daily aircraft maintenance routing problem
(
INFORMS Inst.for Operations Res.and the Management Sciences
, 2013 , Article)
Given a set of flights for a specific fleet type the aircraft routing problem (ARP) determines the flying sequence for each individual aircraft while incorporating specific considerations of minimum turn time maintenance ...
The effects of gas tungsten arch welding on the corrosion and mechanical properties of AA 6061 T6
(2013 , Article)
Corrosion of welded and un-welded Aluminum Alloy 6061 T6 was investigated by immersing specimens in 3.5% (wt) NaCl solution. Potentiodynamic and open circuit potential measurements were conducted. The mechanical properties ...
Greedy algorithms and metaheuristics for a multiple runway combined arrival-departure aircraft sequencing problem
(
Elsevier
, 2013 , Article)
This paper examines the Aircraft Sequencing Problem (ASP) over multiple runways, under mixed mode operations with the objective of minimizing the total weighted tardiness of aircraft landings and departures simultaneously. ...
Potential of geothermal energy for electricity generation in Qatar
(
Canadian Institute of Mining, Metallurgy and Petroleum
, 2013 , Conference Paper)
There is general acceptance that climate change, which is the most important challenge facing humanity, is anthropogenic and attributed to fossil fuel consumption. Therefore, improving the performance of our existing energy ...
Recycling low grade waste heat to electricity
(
Canadian Institute of Mining, Metallurgy and Petroleum
, 2013 , Conference Paper)
Most mining and metallurgical industries produce relatively large quantities of low grade waste heat which they vent, for the most part, to the environment. To date, little is being done to recover some of this heat and ...
Centrifugal Compressor Spiral Dry Gas Seal Simulation Working at Reverse Rotation
(
Elsevier Ltd
, 2013 , Conference Paper)
Unidirectional dry gas seal may experiences reverse rotation when equipped in a centrifugal compressor. This paper describes how the reverse rotation effects on the spiral unidirectional dry gas seal performance and pressure ...