저널 Read more :: arXiv Learning sparse optimal rule fit by safe screening In this paper, we consider linear prediction models in the form of a sparse linear combination of rules, where a rule is an indicator function defined over a hyperrectangle in the input space. Since the number of all possible rules generated from the training dataset becomes extremely large, it has been difficult to consider all of them when fitting a sparse model. In this paper, we propose Safe Optimal Rule Fit (SORF) as an approach to resolve this problem, which is formulated as a convex optimization problem with sparse regularization. The proposed SORF method utilizes the fact that the set of all possible rules can be represented as a tree. By extending a recently popularized convex optimization technique called safe screening, we develop a novel method for pruning the tree such that pruned nodes are guaranteed to be irrelevant to the prediction model. This approach allows us to efficiently learn a prediction model constructed from an exponentially large number of all possible rules. We demonstrate the usefulness of the proposed method by numerical experiments using several benchmark datasets.
연구동향 Read more :: Nobel Prize BREAKING NEWS The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Physics 2018 “for groundbreaking inventions in the field of laser physics” with one half to Arthur Ashkin “for the optical tweezers and their application to biological systems” and the other half jointly to Gérard Mourou and Donna Strickland “for their method of generating high-intensity, ultra-short optical pulses.” The inventions being honoured this year have revolutionised laser physics. Extremely small objects and incredibly fast processes now appear in a new light. Not only physics, but also chemistry, biology and medicine have gained precision instruments for use in basic research and practical applications. Arthur Ashkin invented optical tweezers that grab particles, atoms and molecules with their laser beam fingers. Viruses, bacteria and other living cells can be held too, and examined and manipulated without being damaged. Ashkin’s optical tweezers have created entirely new opportunities for observing and controlling the machinery of life. Gérard Mourou and Donna Strickland paved the way towards the shortest and most intense laser pulses created by mankind. The technique they developed has opened up new areas of research and led to broad industrial and medical applications; for example, millions of eye operations are performed every year with the sharpest of laser beams. Learn more Press release: https://bit.ly/2NdS4rx Popular information: https://bit.ly/2P2jN08 Advanced information: https://bit.ly/2NfDdN8
연구과제 Read more :: GRANTS.GOV Notice of Intent to Publish the Reissuance of PAR-16-042 Drug Discovery For Nervous System Disorders (R21 Clinical Trial Not Allowed) The National Institute of Mental Health, along with the National Institute on Drug Abuse (NIDA) and National Institute on Aging (NIA), informs the community that the following FOA and its companions will be reissued: PAR-16-042 Drug Discovery For Nervous System Disorders (R21). This Notice is being provided to allow potential applicants sufficient time to develop meaningful collaborations and appropriate projects. The FOA will be published in Winter 2019 for The February Receipt Dates. The FOA will continue to utilize the R21 Grant mechanism.