交通信息与安全
交通信息與安全
교통신식여안전
Journal of Transport Information and Safety
2015年
5期
49-54
,共6页
交通管理%路网可靠性%机场集疏运%复杂网络理论%无标度特性
交通管理%路網可靠性%機場集疏運%複雜網絡理論%無標度特性
교통관리%로망가고성%궤장집소운%복잡망락이론%무표도특성
traffic management%road network reliability%airport collection and distribution%complex network the-ory%scale-free property
为了对机场集疏运路网可靠性进行评估,通过分析其节点重要度差异及道路等级划分明显特性,得知机场专用道和衔接道的路网组合形式区别于城市路网。为此,在传统复杂网络特征指标算法上赋予对应的边权重,并重新定义其指标及计算方法,从而提出了改进的机场集疏运复杂网络模型。通过 ArcGIS、模拟实验等方法结合北京首都机场集疏运路网实例,验证了该模型的可行性。其结果表明：传统复杂网络度分布服从泊松分布,而改进的复杂网络节点强度分布服从幂律分布,能较好的反映出机场集疏运路网的无标度特性,科学性、准确性较强；其次,改进的复杂网络模型加权集聚系数为0.015,仅占传统复杂网络模型集聚系数的20%,平均加权距离10.38,高于平均路径长度1.15,与机场集疏运道路等级划分特性明显更契合,但无标度特性并不明显。同时,通过模拟攻击实验发现节点强度对路网可靠性的影响比节点重要度大,通过对该类节点加以重点保护能有效提高机场集疏运路网的可靠性。
為瞭對機場集疏運路網可靠性進行評估,通過分析其節點重要度差異及道路等級劃分明顯特性,得知機場專用道和銜接道的路網組閤形式區彆于城市路網。為此,在傳統複雜網絡特徵指標算法上賦予對應的邊權重,併重新定義其指標及計算方法,從而提齣瞭改進的機場集疏運複雜網絡模型。通過 ArcGIS、模擬實驗等方法結閤北京首都機場集疏運路網實例,驗證瞭該模型的可行性。其結果錶明：傳統複雜網絡度分佈服從泊鬆分佈,而改進的複雜網絡節點彊度分佈服從冪律分佈,能較好的反映齣機場集疏運路網的無標度特性,科學性、準確性較彊；其次,改進的複雜網絡模型加權集聚繫數為0.015,僅佔傳統複雜網絡模型集聚繫數的20%,平均加權距離10.38,高于平均路徑長度1.15,與機場集疏運道路等級劃分特性明顯更契閤,但無標度特性併不明顯。同時,通過模擬攻擊實驗髮現節點彊度對路網可靠性的影響比節點重要度大,通過對該類節點加以重點保護能有效提高機場集疏運路網的可靠性。
위료대궤장집소운로망가고성진행평고,통과분석기절점중요도차이급도로등급화분명현특성,득지궤장전용도화함접도적로망조합형식구별우성시로망。위차,재전통복잡망락특정지표산법상부여대응적변권중,병중신정의기지표급계산방법,종이제출료개진적궤장집소운복잡망락모형。통과 ArcGIS、모의실험등방법결합북경수도궤장집소운로망실례,험증료해모형적가행성。기결과표명：전통복잡망락도분포복종박송분포,이개진적복잡망락절점강도분포복종멱률분포,능교호적반영출궤장집소운로망적무표도특성,과학성、준학성교강；기차,개진적복잡망락모형가권집취계수위0.015,부점전통복잡망락모형집취계수적20%,평균가권거리10.38,고우평균로경장도1.15,여궤장집소운도로등급화분특성명현경계합,단무표도특성병불명현。동시,통과모의공격실험발현절점강도대로망가고성적영향비절점중요도대,통과대해류절점가이중점보호능유효제고궤장집소운로망적가고성。
In order to evaluate the reliability of airport collection and distribution,the differences of node impor-tance and road classes are analyzed,which shows that the connections of the network of airport designated roads and serv-ice roads differs from their urban counterpart.Therefore,edge weights are given based on feature index algorithm of the traditional complex network,and an improved complex network model is proposed.The model is verified by through sim-ulation tests,combining with a case study for the road network of Beijing Capital Airport.The results show that the de-gree distribution of traditional complex network model obeys the Poisson distribution,while the improved complex net-work model follows the power-law distribution,which fits the scale-free property of airport road network better.Moreo-ver,the cluster coefficient of the improved complex network model is 0.01 5,only 20% of the traditional complex network model,and the average weighted length is 10.38,which is 1.1 5 longer than the average path length.It fits the functional classification of airport roads,but the scale-free property is not significant.It is also found through the attacking simula-tions that node strength is more important for network reliability than the node degree,and the reliability of airport road network can be effectively improved by enhancing the protection of this type of nodes.
