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Prediction of NFT Sale Price Fluctuations on OpenSea Using Machine Learning Approaches
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作者 Zixiong Wang Qiuying Chen Sang-Joon Lee 《Computers, Materials & Continua》 SCIE EI 2023年第5期2443-2459,共17页
The rapid expansion of the non-fungible token(NFT)market has attracted many investors.However,studies on the NFT price fluctuations have been relatively limited.To date,the machine learning approach has not been used ... The rapid expansion of the non-fungible token(NFT)market has attracted many investors.However,studies on the NFT price fluctuations have been relatively limited.To date,the machine learning approach has not been used to demonstrate a specific error in NFT sale price fluctuation prediction.The aim of this study was to develop a prediction model for NFT price fluctuations using the NFT trading information obtained from OpenSea,the world’s largest NFT marketplace.We used Python programs to collect data and summarized them as:NFT information,collection information,and related account information.AdaBoost and Random Forest(RF)algorithms were employed to predict the sale price and price fluctuation of NFTs using regression and classification models,respectively.We found that the NFT related account information,especially the number of favorites and activity status of creators,confer a good predictive power to both the models.AdaBoost in the regression model had more accurate predictions,the root mean square error(RMSE)in predicting NFT sale price was 0.047.In predicting NFT sale price fluctuations,RF performed better,which the area under the curve(AUC)reached 0.956.We suggest that investors should pay more attention to the information of NFT creators.We anticipate that these prediction models will reduce the number of investment failures for the investors. 展开更多
关键词 NFT sale price fluctuation opensea ADABOOST Random forest
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基于元搜索引擎跨库检索中检索协议标准比较研究
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作者 何志浩 陈亮 《图书馆学研究》 2007年第12期44-46,共3页
基于元搜索引擎的跨库检索可以检索到通用搜索引擎检索不到的网络数据库资源,但必须解决元搜索引擎与数据库独立搜索引擎间通信的协议标准问题。本文对目前这方面主要的三种通信协议标准OpenSearch,SRU和MXG进行了比较研究,以便为基于... 基于元搜索引擎的跨库检索可以检索到通用搜索引擎检索不到的网络数据库资源,但必须解决元搜索引擎与数据库独立搜索引擎间通信的协议标准问题。本文对目前这方面主要的三种通信协议标准OpenSearch,SRU和MXG进行了比较研究,以便为基于元搜索引擎跨库检索研究的发展提供一些有益的参考。 展开更多
关键词 跨库检索 元搜索引擎 opensea rch SRU MXG
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外海桥墩承台双拼U型混凝土套箱施工技术 被引量:2
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作者 蔡福康 《水运工程》 北大核心 2012年第6期196-200,共5页
针对东海大桥跨海段整体式桥墩承台外海施工恶劣的环境,结合整体式桥墩承台的结构特点,本着减少水上作业时间、尽可能利用现有船机设备的原则,经多方案综合比选确定采用2个U型混凝土套箱水上安装在桩顶上拼接成1个整体式桥墩承台薄壁壳... 针对东海大桥跨海段整体式桥墩承台外海施工恶劣的环境,结合整体式桥墩承台的结构特点,本着减少水上作业时间、尽可能利用现有船机设备的原则,经多方案综合比选确定采用2个U型混凝土套箱水上安装在桩顶上拼接成1个整体式桥墩承台薄壁壳体,然后浇筑封底混凝土及湿接头封闭形成干施工环境的施工工艺。介绍外海桥墩承台双拼U型混凝土套箱的总体施工方案、各种工况受力分析以及施工技术措施等。 展开更多
关键词 外海桥墩承台 U型混凝土套箱 水上安装拼接成薄壁壳体 干施工条件
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