Junzhi Wen, Md Reazul Islam, Azim Ahmadzadeh, R. Angryk
{"title":"Improving Solar Flare Prediction by Time Series Outlier Detection","authors":"Junzhi Wen, Md Reazul Islam, Azim Ahmadzadeh, R. Angryk","doi":"10.48550/arXiv.2206.07197","DOIUrl":"https://doi.org/10.48550/arXiv.2206.07197","url":null,"abstract":". Solar flares not only pose risks to outer space technologies and astronauts’ well being, but also cause disruptions on earth to our high-tech, interconnected infrastructure our lives highly depend on. While a number of machine-learning methods have been proposed to improve flare prediction, none of them, to the best of our knowledge, have investigated the impact of outliers on the reliability and robustness of those models’ performance. In this study, we investigate the impact of outliers in a multivariate time series benchmark dataset, namely SWAN-SF, on flare prediction models, and test our hypothesis. That is, there exist outliers in SWAN-SF, removal of which enhances the performance of the prediction models on unseen datasets. We employ Isolation Forest to detect the outliers among the weaker flare instances. Several experiments are carried out using a large range of contamination rates which deter-mine the percentage of present outliers. We assess the quality of each dataset in terms of its actual contamination using TimeSeriesSVC. In our best findings, we achieve a 279% increase in True Skill Statistic and 68% increase in Heidke Skill Score. The results show that overall a significant improvement can be achieved for flare prediction if outliers are detected and removed properly.","PeriodicalId":102608,"journal":{"name":"International Conference on Artificial Intelligence and Soft Computing","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131734522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Portfolio Transformer for Attention-Based Asset Allocation","authors":"Damian Kisiel, D. Gorse","doi":"10.1007/978-3-031-23492-7_6","DOIUrl":"https://doi.org/10.1007/978-3-031-23492-7_6","url":null,"abstract":"","PeriodicalId":102608,"journal":{"name":"International Conference on Artificial Intelligence and Soft Computing","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121643278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Computer Vision-Based Approach for Driver Distraction Recognition using Deep Learning and Genetic Algorithm Based Ensemble","authors":"Ashlesha Kumar, K. S. Sangwan, Dhiraj","doi":"10.1007/978-3-030-87897-9_5","DOIUrl":"https://doi.org/10.1007/978-3-030-87897-9_5","url":null,"abstract":"","PeriodicalId":102608,"journal":{"name":"International Conference on Artificial Intelligence and Soft Computing","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123486358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Data-Driven Learning of Feedforward Neural Networks with Different Activation Functions","authors":"Grzegorz Dudek","doi":"10.1007/978-3-030-87986-0_6","DOIUrl":"https://doi.org/10.1007/978-3-030-87986-0_6","url":null,"abstract":"","PeriodicalId":102608,"journal":{"name":"International Conference on Artificial Intelligence and Soft Computing","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124298803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Integrate-and-Fire Neurons for Low-Powered Pattern Recognition","authors":"Florian Bacho, Dominique F. Chu","doi":"10.1007/978-3-030-87986-0_3","DOIUrl":"https://doi.org/10.1007/978-3-030-87986-0_3","url":null,"abstract":"","PeriodicalId":102608,"journal":{"name":"International Conference on Artificial Intelligence and Soft Computing","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124156683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Concept Drift Detection Using Autoencoders in Data Streams Processing","authors":"M. Jaworski, L. Rutkowski, P. Angelov","doi":"10.1007/978-3-030-61401-0_12","DOIUrl":"https://doi.org/10.1007/978-3-030-61401-0_12","url":null,"abstract":"","PeriodicalId":102608,"journal":{"name":"International Conference on Artificial Intelligence and Soft Computing","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122677514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}