PPT-Classification and Linear Classifiers

Mohammad Ali Keyvanrad Machine Learning In the Name of God Thanks to M Soleymani Sharif University of Technology R Zemel University of Toronto p Smyth University of California Irvine. N is the process noise or disturbance at time are IID with 0 is independent of with 0 Linear Quadratic Stochastic Control 52 brPage 3br Control policies statefeedback control 0 N called the control policy at time roughly speaking we choo e Ax where is vector is a linear function of ie By where is then is a linear function of and By BA so matrix multiplication corresponds to composition of linear functions ie linear functions of linear functions of some variables Linear Equations 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. Background: Neural decoding. neuron 1. neuron 2. neuron 3. neuron n. Pattern Classifier. Learning association between. neural activity an image. Background. A recent paper by Graf et al. (Nature Neuroscience . 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. Lifeng. Yan. 1361158. 1. Ensemble of classifiers. Given a set . of . training . examples, . a learning algorithm outputs a . classifier which . is an hypothesis about the true . function f that generate label values y from input training samples x. Given . Ludmila. . Kuncheva. School of Computer Science. Bangor University. mas00a@bangor.ac.uk. . Part 2. 1. Combiner. Features. Classifier 2. Classifier 1. Classifier L. …. Data set. A . . Combination level. . Nathalie Japkowicz. School of Electrical Engineering . & Computer Science. . University of Ottawa. nat@site.uottawa.ca. . Motivation: My story. A student and I designed a new algorithm for data that had been provided to us by the National Institute of Health (NIH).. Machine Learning Algorithms . Mohak . Shah Nathalie . Japkowicz. GE . Software University of Ottawa. ECML 2013, . Prague. “Evaluation is the key to making real progress in data mining”. [Witten & Frank, 2005], p. 143. Linear classifiers on pixels are bad. Solution 1: Better feature vectors. Solution 2: Non-linear classifiers. A pipeline for recognition. Compute image gradients. Compute SIFT descriptors. Assign to k-means centers. BHSAI. Jinbo. Bi, . Ph.D.. HR. SBP. SpO2. MAP. DBP. RR. 0. 2. 4. 6. 8. 10. 12. 14. 16. Time (min). HR. RR. SBP. SpO2. MAP. DBP. 60. 100. 140. 80. 100. 40. 120. 200. 20. 40. 60. 80. mmHg. . % . bpm. for Indoor Room Recognition . CGS participation at ImageCLEF2010 Robot Vision Task . Walter . Lucetti. . Emanuel . Luchetti. . Gustavo Stefanini . Advanced . Robotics Research Center Scuola Superiore di Studi e Perfezionamento Sant’Anna . Given: Set S {(x)} xX, with labels Y = {1, Sahil Patel. 1. , Justin Guo. 2. , Maximilian Wang. 2. Advisors: Dr. . Cuixian. (Tracy) Chen, Ms. Jessica Gray, Ms. Georgia Smith, Ms. Bailey Hall, Mr. Michael Suggs. 1. John T. Hoggard High School, .