Persistent and ever-changing threat of terrorism has led to the evolution of security systems in the air transportation industry. Passenger and checked-baggage screening prior to boarding an aircraft has become a priority for the airport security system. We propose a two-stage screening system by integrating the passenger prescreening and a multi-level checked-baggage screening. Based on the concept of the weighted k-out-of-n system, we introduce an integrated weighted alarm security screening system for a multi-level baggage screening system, where the system alarms when the total weight of its working levels is greater than a predefined system alarm threshold. To improve the security and efficiency of aviation systems, two optimization models are formulated to enhance the detection of possible threats in the passenger and baggage screening with consideration of the system life cycle cost. The optimal solutions of the threshold values are obtained for screening technologies and passenger classes to achieve the maximum security and efficiency. Numerical analysis is implemented to demonstrate the effectiveness of the proposed two-stage screening system.

恐怖主义的持续和不断变化的威胁导致了航空运输业安全系统的发展。登机前的乘客和托运行李检查已成为机场安全系统的优先事项。我们提出了通过整合旅客预安检和多级托运行李安检的两阶段安检系统。基于加权k-out-n-n 的概念在系统中，我们为多级行李安检系统引入了集成加权警报安检系统，当其工作级别的总重量大于预定义的系统警报阈值时，系统会发出警报。为提高航空系统的安全性和效率，在考虑系统生命周期成本的情况下，制定了两个优化模型，以增强对旅客和行李检查中可能存在的威胁的检测。为筛选技术和乘客等级获得阈值的最优解，以实现最大的安全性和效率。实施数值分析以证明所提出的两阶段筛选系统的有效性。