Download or read book Analysis of Rare Categories written by Jingrui He and published by Springer Science & Business Media. This book was released on 2012-01-05 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: In many real-world problems, rare categories (minority classes) play essential roles despite their extreme scarcity. The discovery, characterization and prediction of rare categories of rare examples may protect us from fraudulent or malicious behavior, aid scientific discovery, and even save lives. This book focuses on rare category analysis, where the majority classes have smooth distributions, and the minority classes exhibit the compactness property. Furthermore, it focuses on the challenging cases where the support regions of the majority and minority classes overlap. The author has developed effective algorithms with theoretical guarantees and good empirical results for the related techniques, and these are explained in detail. The book is suitable for researchers in the area of artificial intelligence, in particular machine learning and data mining.
Download or read book Improving text classification with Boolean retrieval for rare categories written by Robert F. Chew and published by RTI Press. This book was released on 2023-04-10 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advancements in machine learning and natural language processing have made text classification increasingly attractive for information retrieval. However, developing text classifiers is challenging when no prior labeled data are available for a rare category of interest. Finding instances of the rare class using a uniform random sample can be inefficient and costly due to the rare category’s low base rate. This work presents an approach that combines the strengths of text classification and Boolean retrieval to help learn rare concepts of interest. As a motivating example, we use the task of finding conversations that reference firearm injury or violence in the Crisis Text Line database. Identifying rare categories, like firearm injury or violence, can improve crisis lines' abilities to support people with firearm-related crises or provide appropriate resources. Our approach outperforms a set of iteratively refined Boolean queries and results in a recall of 0.91 on a test set generated from a process independent of our study. Our results suggest that text classification with Boolean retrieval initialization can be effective for finding rare categories of interest and improve on the precision of using Boolean retrieval alone.
Download or read book An Introduction to Categorical Data Analysis written by Alan Agresti and published by John Wiley & Sons. This book was released on 2018-10-11 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: A valuable new edition of a standard reference The use of statistical methods for categorical data has increased dramatically, particularly for applications in the biomedical and social sciences. An Introduction to Categorical Data Analysis, Third Edition summarizes these methods and shows readers how to use them using software. Readers will find a unified generalized linear models approach that connects logistic regression and loglinear models for discrete data with normal regression for continuous data. Adding to the value in the new edition is: • Illustrations of the use of R software to perform all the analyses in the book • A new chapter on alternative methods for categorical data, including smoothing and regularization methods (such as the lasso), classification methods such as linear discriminant analysis and classification trees, and cluster analysis • New sections in many chapters introducing the Bayesian approach for the methods of that chapter • More than 70 analyses of data sets to illustrate application of the methods, and about 200 exercises, many containing other data sets • An appendix showing how to use SAS, Stata, and SPSS, and an appendix with short solutions to most odd-numbered exercises Written in an applied, nontechnical style, this book illustrates the methods using a wide variety of real data, including medical clinical trials, environmental questions, drug use by teenagers, horseshoe crab mating, basketball shooting, correlates of happiness, and much more. An Introduction to Categorical Data Analysis, Third Edition is an invaluable tool for statisticians and biostatisticians as well as methodologists in the social and behavioral sciences, medicine and public health, marketing, education, and the biological and agricultural sciences.
Download or read book Cochrane Handbook for Systematic Reviews of Interventions written by Julian P. T. Higgins and published by Wiley. This book was released on 2008-11-24 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Healthcare providers, consumers, researchers and policy makers are inundated with unmanageable amounts of information, including evidence from healthcare research. It has become impossible for all to have the time and resources to find, appraise and interpret this evidence and incorporate it into healthcare decisions. Cochrane Reviews respond to this challenge by identifying, appraising and synthesizing research-based evidence and presenting it in a standardized format, published in The Cochrane Library (www.thecochranelibrary.com). The Cochrane Handbook for Systematic Reviews of Interventions contains methodological guidance for the preparation and maintenance of Cochrane intervention reviews. Written in a clear and accessible format, it is the essential manual for all those preparing, maintaining and reading Cochrane reviews. Many of the principles and methods described here are appropriate for systematic reviews applied to other types of research and to systematic reviews of interventions undertaken by others. It is hoped therefore that this book will be invaluable to all those who want to understand the role of systematic reviews, critically appraise published reviews or perform reviews themselves.
Download or read book Application of molecular genetics for the diagnosis and classification of rare cancers in surgical pathology written by Jinping Lai and published by Frontiers Media SA. This book was released on 2023-08-30 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Examples of Resource Inventory and Monitoring in National Parks of California written by and published by . This book was released on 1990 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistical Analysis and Machine Learning for Coal Classification for Rare Earth Elements Y REY written by Zachary Bartley Young and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fighting Churn with Data written by Carl Gold and published by Simon and Schuster. This book was released on 2020-11-13 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: The beating heart of any product or service business is returning clients. Don't let your hard-won customers vanish, taking their money with them. In Fighting Churn with Data you'll learn powerful data-driven techniques to maximize customer retention and minimize actions that cause them to stop engaging or unsubscribe altogether. Summary The beating heart of any product or service business is returning clients. Don't let your hard-won customers vanish, taking their money with them. In Fighting Churn with Data you'll learn powerful data-driven techniques to maximize customer retention and minimize actions that cause them to stop engaging or unsubscribe altogether. This hands-on guide is packed with techniques for converting raw data into measurable metrics, testing hypotheses, and presenting findings that are easily understandable to non-technical decision makers. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. About the technology Keeping customers active and engaged is essential for any business that relies on recurring revenue and repeat sales. Customer turnover—or “churn”—is costly, frustrating, and preventable. By applying the techniques in this book, you can identify the warning signs of churn and learn to catch customers before they leave. About the book Fighting Churn with Data teaches developers and data scientists proven techniques for stopping churn before it happens. Packed with real-world use cases and examples, this book teaches you to convert raw data into measurable behavior metrics, calculate customer lifetime value, and improve churn forecasting with demographic data. By following Zuora Chief Data Scientist Carl Gold’s methods, you’ll reap the benefits of high customer retention. What's inside Calculating churn metrics Identifying user behavior that predicts churn Using churn reduction tactics with customer segmentation Applying churn analysis techniques to other business areas Using AI for accurate churn forecasting About the reader For readers with basic data analysis skills, including Python and SQL. About the author Carl Gold (PhD) is the Chief Data Scientist at Zuora, Inc., the industry-leading subscription management platform. Table of Contents: PART 1 - BUILDING YOUR ARSENAL 1 The world of churn 2 Measuring churn 3 Measuring customers 4 Observing renewal and churn PART 2 - WAGING THE WAR 5 Understanding churn and behavior with metrics 6 Relationships between customer behaviors 7 Segmenting customers with advanced metrics PART 3 - SPECIAL WEAPONS AND TACTICS 8 Forecasting churn 9 Forecast accuracy and machine learning 10 Churn demographics and firmographics 11 Leading the fight against churn
Download or read book R for Data Science written by Hadley Wickham and published by "O'Reilly Media, Inc.". This book was released on 2016-12-12 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn how to use R to turn raw data into insight, knowledge, and understanding. This book introduces you to R, RStudio, and the tidyverse, a collection of R packages designed to work together to make data science fast, fluent, and fun. Suitable for readers with no previous programming experience, R for Data Science is designed to get you doing data science as quickly as possible. Authors Hadley Wickham and Garrett Grolemund guide you through the steps of importing, wrangling, exploring, and modeling your data and communicating the results. You'll get a complete, big-picture understanding of the data science cycle, along with basic tools you need to manage the details. Each section of the book is paired with exercises to help you practice what you've learned along the way. You'll learn how to: Wrangle—transform your datasets into a form convenient for analysis Program—learn powerful R tools for solving data problems with greater clarity and ease Explore—examine your data, generate hypotheses, and quickly test them Model—provide a low-dimensional summary that captures true "signals" in your dataset Communicate—learn R Markdown for integrating prose, code, and results
Download or read book Tables for Emission Spectrographic Analysis of Rare Earth Elements written by Ch. Kerekes and published by Elsevier. This book was released on 2013-10-22 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlas and Tables for Emission Spectrographic Analysis of Rare Earth Elements focuses on the analysis of rare earths with the Zeiss Q 24 spectrograph or with instruments of similar dispersion. The book first offers information on the division of the spectra of rare earth elements and Sc and Y into three groups. The spectra of Ce, Pr, Nd, Gd, Tb, Dy, Ho, and Er have lines that, however, do not form characteristic line groups. The text underscores that in preparing the Atlas, the spectral pure-grade rare earth oxides sold by the Johnson & Matthey Co. were considered. Through the help of their spectra, the usable analysis lines and the wavelength values of the interfering spectral lines are created. The operating and photographic conditions are tabulated. The book stresses that for each rare earth, the analysis lines are provided in order of decreasing wavelength. The number located in the lower left corner for each analysis line indicates its relative intensity. The fifteen columns contain the interfering lines of other rare earths and of Sc and Y. The interfering lines are created through the use of the double projector of the Optica Milano Co. and the Gatterer Spectrum. The text is a great source of information for readers wanting to analyze rare earths with the Zeiss Q 24 spectrograph or with instruments of similar dispersion.
Download or read book Evaluation of the RARE II Public Input Analysis Process written by United States. Forest Service and published by . This book was released on 1980 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multitemporal Earth Observation Image Analysis written by Clément Mallet and published by John Wiley & Sons. This book was released on 2024-08-20 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earth observation has witnessed a unique paradigm change in the last decade with a diverse and ever-growing number of data sources. Among them, time series of remote sensing images has proven to be invaluable for numerous environmental and climate studies. Multitemporal Earth Observation Image Analysis provides illustrations of recent methodological advances in data processing and information extraction from imagery, with an emphasis on the temporal dimension uncovered either by recent satellite constellations (in particular the Sentinels from the European Copernicus programme) or archival aerial images available in national archives. The book shows how complementary data sources can be efficiently used, how spatial and temporal information can be leveraged for biophysical parameter estimation, classification of land surfaces and object tracking, as well as how standard machine learning and state-of-the-art deep learning solutions can solve complex problems with real-world applications.
Download or read book Rare Category Analysis written by Jingrui He and published by . This book was released on 2010 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "In many real world problems, rare categories (minority classes) play an essential role despite of their extreme scarcity. For example, in financial fraud detection, the vast majority of the financial transactions are legitimate, and only a small number may be fraudulent; in Medicare fraud detection, the percentage of bogus claims is small, but the total loss is significant; in network intrusion detection, malicious network activities are hidden among huge volumes of routine network traffic; in astronomy, only 0.001% of the objects in sky survey images are truly beyond the scope of current science and may lead to new discoveries; in spam image detection, the near-duplicate spam images are difficult to discover from the large number of non-spam image; in rare disease diagnosis, the rare diseases affect less than 1 out of 2000 people, but the consequences can be very severe. Therefore, the discovery, characterization and prediction of rare categories or rare examples may protect us from fraudulent or malicious behaviors, provide the aid for scientific discoveries, and even save lives. This thesis focuses on rare category analysis, where the majority classes have a smooth distribution, and the minority classes exhibit a compactness property. Furthermore, we focus on the challenging cases where the support regions of the majority and minority classes overlap each other. To the best of our knowledge, this thesis is the first end-to-end investigation of rare categories. Depending on the availability of the label information, we can perform either supervised or unsupervised rare category analysis. In the supervised settings, our first task is rare category detection, which is to discover at least one example from each minority class with the help of a labeling oracle. Then given labeled examples from all the classes, our second task is rare category characterization. The goal here is to find a compact representation for the minority classes in order to identify all the rare examples with high precision and recall. On the other hand, in the unsupervised settings, we do not have access to a labeling oracle. Here we propose to co-select candidate examples from the minority classes and the relevant features, which benefits both tasks (rare category selection and feature selection). For each of the above tasks, we have developed effective algorithms with theoretical guarantees as well as good empirical results. In the future, we plan to apply rare category analysis on rich data, such as medical images, texts / blogs, Electronic Health Records (EHR), web link graphs, stream data, etc; we plan to build statistical models for the rare categories in order to understand how they emerge and evolve over time; we plan to study complex fraud based on rare category analysis; we plan to make use of transfer learning to help with our analysis; we also plan to build a complete system for rare category analysis."
Download or read book Summary Report of the Geological Survey Department written by Geological Survey of Canada and published by . This book was released on 1902 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vol. for 1901 includes atlas of maps.
Download or read book Summary Report Geological Survey Department written by Geological Survey of Canada and published by . This book was released on 1900 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Summary Report of the Geological Survey Department of Canada for the Year written by and published by . This book was released on 1901 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Digital Libraries Universal and Ubiquitous Access to Information written by George Buchanan and published by Springer. This book was released on 2008-11-14 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 11th International C- ference on Asian Digital Libraries (ICADL 2008) held in Bali, Indonesia, in December 2008. The objective of this conference series is to provide a forum for presentation of high-quality research in the ?eld of digital libraries. ICADL 2008 provided an opportunity for digital libraries researchers and practitioners in the Asia Paci?c area and beyond to gather to explore ideas, exchange and share experiences, and further build the research network in this region. ICADL 2008 was a truly international event, with presenters from 21 countries. A total of 63 papers were accepted for inclusion in the proceedings: 30 full papers, 20 short papers, and extended abstracts of 13 posters. Submissions were subject to a rigorous, blind peer-review process. The research topics cover the spectrum of digital libraries, including multimedia digital libraries, usab- ity and evaluation, information retrieval, ontologies, social tagging, metadata issues, multi- and cross-language retrieval, digital preservation, scholarly p- lishing and communities, and more. Additionally, three tutorials were o?ered in association with the conference by Andreas Rauber (Vienna University of Technology), David Bainbridge (University of Waikato), and George Buchanan (Swansea University).
