Implementing machine learning algorithms in the non-conducive environment of the vehicular network requires some adaptations due to the high computational complexity of these algorithms.K-clustering algorithms are sim...Implementing machine learning algorithms in the non-conducive environment of the vehicular network requires some adaptations due to the high computational complexity of these algorithms.K-clustering algorithms are simplistic,with fast performance and relative accuracy.However,their implementation depends on the initial selection of clusters number(K),the initial clusters’centers,and the clustering metric.This paper investigated using Scott’s histogram formula to estimate the K number and the Link Expiration Time(LET)as a clustering metric.Realistic traffic flows were considered for three maps,namely Highway,Traffic Light junction,and Roundabout junction,to study the effect of road layout on estimating the K number.A fast version of the PAM algorithm was used for clustering with a modification to reduce time complexity.The Affinity propagation algorithm sets the baseline for the estimated K number,and the Medoid Silhouette method is used to quantify the clustering.OMNET++,Veins,and SUMO were used to simulate the traffic,while the related algorithms were implemented in Python.The Scott’s formula estimation of the K number only matched the baseline when the road layout was simple.Moreover,the clustering algorithm required one iteration on average to converge when used with LET.展开更多
Great Scott.I’ve forgotten who wrote Ivanhoe.句中 Great Scott 是一个惊叹语,意为“天哪.啊呀.”(相当于 GreatGod/Caesar)并非“伟大的斯科特”,另外,Scott 口语中意为“迅速跑开,溜走”。如:Scott,or you will be late.“快走,...Great Scott.I’ve forgotten who wrote Ivanhoe.句中 Great Scott 是一个惊叹语,意为“天哪.啊呀.”(相当于 GreatGod/Caesar)并非“伟大的斯科特”,另外,Scott 口语中意为“迅速跑开,溜走”。如:Scott,or you will be late.“快走,否则你将迟到了”。英语人名的转义(不复存在人名之意)不乏其例。现就一些常见的英语人名的转义用法,举例试析.以飨凄者。1.Joe(乔)如:展开更多
Scott Faul先生于2004年加入德国罗曼动物保健有限公司(以下简称"罗曼动保"),目前是罗曼动保亚太区总经理、中国代表处首席代表。Scott Faul先生来自美国,至今已在中国生活了6、7年,对中国的家禽行业有着深入的了解和研究。...Scott Faul先生于2004年加入德国罗曼动物保健有限公司(以下简称"罗曼动保"),目前是罗曼动保亚太区总经理、中国代表处首席代表。Scott Faul先生来自美国,至今已在中国生活了6、7年,对中国的家禽行业有着深入的了解和研究。作为企业管理硕士,他从事家禽行业的市场开发与管理已有10余年的丰富经验。在Scott先生的领导下仅用了短短3年时间就使罗曼动保在亚太区的市场销售额得到迅速增长,并将罗曼动保的多个享誉世界的产品带到了中国。如今亚太区的市场已经成为罗曼动保在全球市场占有率中的重要组成部分。此次他又将在欧洲市场被广泛认可和使用的家禽肠炎沙门氏菌病活疫苗带到中国,填补了中国鸡肠炎沙门氏菌病活疫苗的市场空白。展开更多
文摘Implementing machine learning algorithms in the non-conducive environment of the vehicular network requires some adaptations due to the high computational complexity of these algorithms.K-clustering algorithms are simplistic,with fast performance and relative accuracy.However,their implementation depends on the initial selection of clusters number(K),the initial clusters’centers,and the clustering metric.This paper investigated using Scott’s histogram formula to estimate the K number and the Link Expiration Time(LET)as a clustering metric.Realistic traffic flows were considered for three maps,namely Highway,Traffic Light junction,and Roundabout junction,to study the effect of road layout on estimating the K number.A fast version of the PAM algorithm was used for clustering with a modification to reduce time complexity.The Affinity propagation algorithm sets the baseline for the estimated K number,and the Medoid Silhouette method is used to quantify the clustering.OMNET++,Veins,and SUMO were used to simulate the traffic,while the related algorithms were implemented in Python.The Scott’s formula estimation of the K number only matched the baseline when the road layout was simple.Moreover,the clustering algorithm required one iteration on average to converge when used with LET.
文摘Great Scott.I’ve forgotten who wrote Ivanhoe.句中 Great Scott 是一个惊叹语,意为“天哪.啊呀.”(相当于 GreatGod/Caesar)并非“伟大的斯科特”,另外,Scott 口语中意为“迅速跑开,溜走”。如:Scott,or you will be late.“快走,否则你将迟到了”。英语人名的转义(不复存在人名之意)不乏其例。现就一些常见的英语人名的转义用法,举例试析.以飨凄者。1.Joe(乔)如:
