Security analysis of security inspection mode of air cargo classification and grade
After the goods pass the security inspection,four types of security inspection results are generated:true alarm,true clear,false alarm,and false clear.This article takes the probability of false clear as an indicator to measure the security of traditional security inspection mode and classified and graded security inspection mode.Using a visual search plus decision model,the process of security inspection personnel judging images is analyzed,and the probability of false alarms and false clear in the security inspection system is obtained.Based on the queuing theory formula,the time required for goods to complete security inspection is calculated.A non-linear programming model is established for traditional security inspection mode and classified and graded security inspection mode,with the actual time of the security inspector judging images as the decision variable,minimizing the probability of security inspection false clear as the goal,and using security inspection false alarm and average security inspection time of goods as constraints.An example analysis is conducted on the optimization model,and the results show that when m is 0.1,using the classified and graded security inspection mode can significantly improve the security of the security inspection system while ensuring the speed of goods passing through.Finally,sensitivity analysis is conducted,and the results show that compared with the traditional security inspection mode,the classified and graded security inspection mode reduces the probability of false clear and greatly improves system security when the proportion of high-risk goods m is in the(0,0.45)range,and the optimal value of m is 0.12.Compared with the traditional security inspection mode,the classified and graded security inspection mode can significantly improve system security in three situations,namely,when the airport has a large cargo volume,the goods urgently need security inspection,or the airport can accept a higher probability of false alarm.
public safetyvisual search plus decisionwaiting timefalse clear ratecargo risk classes
NETL
NSTL
万方数据
