PDF-Bagging and Boosting: Resamplingfor Classifier Design

SargurSrihari sriharicedarbuffaloedu Bagging 149Arcing150adaptive reweighting and combining150refers to reusing or selecting data to improve classification 149Includes both bagging and. Boosting, Bagging, Random Forests and More. Yisong Yue. Supervised Learning. Goal:. learn predictor h(x) . High accuracy (low error). Using training data {(x. 1. ,y. 1. ),…,(. x. n. ,y. n. )}. Person. Ata . Kaban. Motivation & beginnings. Suppose we have a learning algorithm that is guaranteed with high probability to be slightly better than random guessing – we call this a . weak learner. E.g. if an email contains the work “money” then classify it as spam, otherwise as non-spam. Reading. Ch. 18.6-18.12, 20.1-20.3.2. (Not Ch. 18.5). Outline. Different types of learning problems. Different types of learning algorithms. Supervised learning. Decision trees. Naïve Bayes. Perceptrons. 1. Ensembles. CS 478 - Ensembles. 2. A “Holy Grail” of Machine Learning. Automated. Learner. Just a . Data Set. or. just an. explanation. of the problem. Hypothesis. Input Features. Outputs. CS 478 - Ensembles. Ludmila. I . Kuncheva. School of Computer Science. Bangor University, UK. Publications (580). Citations (4594). “CLASSIFIER ENSEMBLE DIVERSITY”. Search on 10 Sep 2014. MULTIPLE CLASSIFIER SYSTEMS 30. A “paradigmatic” method for real-time object detection . Training is slow, but detection is very fast. Key ideas. Integral images. for fast feature evaluation. Boosting. for feature selection. Attentional. undergraduate project. By: Avikam Agur and Maayan Zehavi. Advisors: Prof. Michael Elhadad and Mr. Tal Baumel. Motivation. word2vec. : . An algorithm that associates closely-related words.. Combin. ing with the outcome of our project, this algorithm will help creating a medical text summarizer.. Winter 2012. Daniel Weld. Slides adapted from Tom . Dietterich. , Luke Zettlemoyer, Carlos . Guestrin. , . Nick Kushmerick, Padraig Cunningham. © Daniel S. Weld. 2. Ensembles of Classifiers . Traditional approach: Use one classifier. Chong Ho (Alex) Yu. Problems of bias and variance. The bias is . the . error which results from missing a target. . For . example, if an estimated mean is 3, but the actual population value is 3.5, then the bias value is 0.5. . Boosting. Nhan Nguyen. Computer Science and Engineering Dept.. Boosting. Method for converting rules of thumb into a prediction rule.. Rule . of thumb. ?. Method?. Binary Classification. X: set of all possible instances or examples. . (Courtesy . Boris . Babenko. ). slides adapted from Svetlana . Lazebnik. Face detection and recognition. Detection. Recognition. “Sally”. Consumer application: Apple . iPhoto. http://www.apple.com/ilife/iphoto/. CoinLooting is a successful German company that specializes in gaming services and have a lot of experience in the field of gold and boosting services of all kinds. Therefore, CoinLooting offers you a swift and premium-quality service – at the best price attainable. Visit: https://www.coinlooting.com/ Given: Set S {(x)} xX, with labels Y = {1, Want to keep your testosterone levels healthy? Eating these 5 best testosterone boosting foods that are high in nutrients & vitamins.