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基于Wayback的索引策略研究 被引量:5
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作者 孙志茹 吴振新 曲云鹏 《现代图书情报技术》 CSSCI 北大核心 2009年第4期14-18,共5页
通过分析目前使用Wayback作为访问工具的Web Archive项目,总结出资源索引工作采用的几个典型索引策略,并对其适用范围及优缺点进行初步分析和探讨,以期为界内同行提供参考。
关键词 WEB ARCHIVE wayback索引策略
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A Measurement Study of the Ethereum Underlying P2P Network
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作者 Mohammad ZMasoud Yousef Jaradat +3 位作者 Ahmad Manasrah Mohammad Alia Khaled Suwais Sally Almanasra 《Computers, Materials & Continua》 SCIE EI 2024年第1期515-532,共18页
This work carried out a measurement study of the Ethereum Peer-to-Peer(P2P)network to gain a better understanding of the underlying nodes.Ethereum was applied because it pioneered distributed applications,smart contra... This work carried out a measurement study of the Ethereum Peer-to-Peer(P2P)network to gain a better understanding of the underlying nodes.Ethereum was applied because it pioneered distributed applications,smart contracts,and Web3.Moreover,its application layer language“Solidity”is widely used in smart contracts across different public and private blockchains.To this end,we wrote a new Ethereum client based on Geth to collect Ethereum node information.Moreover,various web scrapers have been written to collect nodes’historical data fromthe Internet Archive and the Wayback Machine project.The collected data has been compared with two other services that harvest the number of Ethereumnodes.Ourmethod has collectedmore than 30% more than the other services.The data trained a neural network model regarding time series to predict the number of online nodes in the future.Our findings show that there are less than 20% of the same nodes daily,indicating thatmost nodes in the network change frequently.It poses a question of the stability of the network.Furthermore,historical data shows that the top ten countries with Ethereum clients have not changed since 2016.The popular operating system of the underlying nodes has shifted from Windows to Linux over time,increasing node security.The results have also shown that the number of Middle East and North Africa(MENA)Ethereum nodes is neglected compared with nodes recorded from other regions.It opens the door for developing new mechanisms to encourage users from these regions to contribute to this technology.Finally,the model has been trained and demonstrated an accuracy of 92% in predicting the future number of nodes in the Ethereum network. 展开更多
关键词 Ethereum MEASUREMENT ethereum client neural network time series forecasting web-scarping wayback machine blockchain
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