Top-k ranking of websites according to traffic volume is important for Internet Service Providers(ISPs) to understand network status and optimize network resources. However, the ranking result always has a big deviati...Top-k ranking of websites according to traffic volume is important for Internet Service Providers(ISPs) to understand network status and optimize network resources. However, the ranking result always has a big deviation with actual rank for the existence of unknown web traffic, which cannot be identified accurately under current techniques. In this paper, we introduce a novel method to approximate the actual rank. This method associates unknown web traffic with websites according to statistical probabilities. Then, we construct a probabilistic top-k query model to rank websites. We conduct several experiments by using real HTTP traffic traces collected from a commercial ISP covering an entire city in northern China. Experimental results show that the proposed techniques can reduce the deviation existing between the ground truth and the ranking results vastly. In addition, we find that the websites providing video service have higher ratio of unknown IP as well as higher ratio of unknown traffic than the websites providing text web page service. Specifically, we find that the top-3 video websites have more than 90% of unknown web traffic. All these findings are helpful for ISPs understanding network status and deploying Content Distributed Network(CDN).展开更多
In the supply chain management theory, enterprise and supplier relationship management is very important. Supplier Management for the significance of enhancing the competitiveness of enterprises, to achieve corporate ...In the supply chain management theory, enterprise and supplier relationship management is very important. Supplier Management for the significance of enhancing the competitiveness of enterprises, to achieve corporate strategic objectives can＇t be ignored. This paper studies the environment in the supply chain, with the means of information, management of suppliers around the theory, focuses on the suppliers to deepen collaboration,strengthen and control the management, comprehensive evaluation, collaboration and win-win four aspects related content. Optimize supplier relationships by making better enhance the power companies supplier relationship management level, to ensure that the material quality, quantity of time and supplies.展开更多
基金supported by 111 Project of China under Grant No.B08004
文摘Top-k ranking of websites according to traffic volume is important for Internet Service Providers(ISPs) to understand network status and optimize network resources. However, the ranking result always has a big deviation with actual rank for the existence of unknown web traffic, which cannot be identified accurately under current techniques. In this paper, we introduce a novel method to approximate the actual rank. This method associates unknown web traffic with websites according to statistical probabilities. Then, we construct a probabilistic top-k query model to rank websites. We conduct several experiments by using real HTTP traffic traces collected from a commercial ISP covering an entire city in northern China. Experimental results show that the proposed techniques can reduce the deviation existing between the ground truth and the ranking results vastly. In addition, we find that the websites providing video service have higher ratio of unknown IP as well as higher ratio of unknown traffic than the websites providing text web page service. Specifically, we find that the top-3 video websites have more than 90% of unknown web traffic. All these findings are helpful for ISPs understanding network status and deploying Content Distributed Network(CDN).
文摘In the supply chain management theory, enterprise and supplier relationship management is very important. Supplier Management for the significance of enhancing the competitiveness of enterprises, to achieve corporate strategic objectives can＇t be ignored. This paper studies the environment in the supply chain, with the means of information, management of suppliers around the theory, focuses on the suppliers to deepen collaboration,strengthen and control the management, comprehensive evaluation, collaboration and win-win four aspects related content. Optimize supplier relationships by making better enhance the power companies supplier relationship management level, to ensure that the material quality, quantity of time and supplies.
