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作者 Lee, Adrian Jenkyn
書名 Optimality, uncertainty, and performance of passenger screening in aviation security systems
國際標準書號 9781109223071
book jacket
說明 149 p
附註 Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3718
Adviser: Srinivasa M. Salapaka
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009
The design of aviation security systems has become increasingly important over the past decade. Passenger and baggage screening is an essential component of aviation security that aids in the detection and removal of threats endangering the safety of air transportation. Upon entering the security checkpoint, passengers are assigned to security classes defined by a set of detection devices. However, due to limited budget and personnel resources, as well as constraints on the detection device capacities, only a fraction of the passengers may be screened at the highest security levels
This dissertation develops optimal policies that sequentially assign passengers to a multi-level security class framework by maximizing the overall true alarm rate. Through both a probabilistic analysis and feedback linearization, a closed-loop policy is obtained that achieves desired security class occupancies for a finite set of passengers anticipated to undergo screening during a given time period. Measures are presented that compare the performance of sequential passenger assignment policies with respect to the retrospective optimal solution. Uncertainty in passenger risk is addressed by first generalizing the sequential stochastic assignment problem, involving the assignment of workers to sequentially arriving jobs, where uncertainty lies in the job value distribution. Three estimators are presented that address various levels of uncertainty while simultaneously improving worker assignments. Then, these estimation algorithms are used to decrease the sensitivity to variations in the passenger risk. Finally, the multi-level security model is extended to incorporate the queueing process within the passenger assignment decision. An optimal, open-loop policy is obtained which minimizes the expected amount of time a passenger spends in the security system, while an optimal, closed-loop policy is obtained that balances the expected number of true alarms with the expected amount of time a passenger spends in the security system
The future direction of aviation security system design involves creating a system of systems with layers of protection, and exhibits flexibility to quickly protect against new threats. This dissertation provides methodologies that increase security and passenger throughput by efficiently and effectively utilizing limited screening resources, while responsively adapting to changing threat environments
School code: 0090
Host Item Dissertation Abstracts International 70-06B
主題 Engineering, Industrial
Operations Research
Alt Author University of Illinois at Urbana-Champaign
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