다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Machine Learning is the study of methods for programming computers to learn. Computers are applied to a wide range of tasks, and for most of these it is relatively easy for programmers to design and implement the necessary software. However, there are many tasks for which this is difficult or impossible. These can be divided into four general categories. First, there are problems for which there exist no human experts. For example, in modern automated manufacturing facilities, there is a need to predict machine failures before they occur by analyzing sensor readings. Because the machines are new, there are no human experts who can be interviewed by a programmer to provide the knowledge necessary to build a computer system. A machine learning system can study recorded data and subsequent machine failures and learn prediction rules. Second, there are problems where human experts exist, but where they are unable to explain their expertise. This is the case in many perceptual tasks, such as speech recognition, hand-writing recognition, and natural language understanding. Virtually all humans exhibit expert-level abilities on these tasks, but none of them can describe the detailed steps that they follow as they perform them. Fortunately, humans can provide machines with examples of the inputs and correct outputs for these tasks, so machine learning algorithms can learn to map the inputs to the outputs. Third, there are problems where phenomena are changing rapidly. In finance, for example, people would like to predict the future behavior of the stock market, of consumer purchases, or of exchange rates. These behaviors change frequently, so that even if a programmer could construct a good predictive computer program, it would need to be rewritten frequently. A learning program can relieve the programmer of this burden by constantly modifying and tuning a set of learned prediction rules. Fourth, there are applications that need to be customized for each computer user separately. Consider, for example, a program to filter unwanted electronic mail messages. Different users will need different filters. It is unreasonable to expect each user to program his or her own rules, and it is infeasible to provide every user with a software engineer to keep the rules up-to-date. A machine learning system can learn which mail messages the user rejects and maintain the filtering rules automatically. Machine learning addresses many of the same research questions as the fields of statistics, data mining, and psychology, but with differences of emphasis. Statistics focuses on understanding the phenomena that have generated the data, often with the goal of testing different hypotheses about those phenomena. Data mining seeks to find patterns in the data that are understandable by people. Psychological studies of human learning aspire to understand the mechanisms underlying the various learning behaviors exhibited by people (concept learning, skill acquisition, strategy change, etc.).

Machine learning

Data Mining - Concepts and Techniques.

The book Knowledge Discovery in Databases, edited by Piatetsky-Shapiro and Frawley [PSF91], is an early collection of research papers on knowledge discovery from data. The book Advances in Knowledge Discovery and Data Mining, edited by Fayyad, Piatetsky-Shapiro, Smyth, and Uthurusamy [FPSSe96], is a collection of later research results on knowledge discovery and data mining. There have been many data mining books published in recent years, including Predictive Data Mining by Weiss and Indurkhya [WI98], Data Mining Solutions: Methods and Tools for Solving Real-World Problems by Westphal and Blaxton [WB98], Mastering Data Mining: The Art and Science of Customer Relationship Management by Berry and Linofi [BL99], Building Data Mining Applications for CRM by Berson, Smith, and Thearling [BST99], Data Mining: Practical Machine Learning Tools and Techniques by Witten and Frank [WF05], Principles of Data Mining (Adaptive Computation and Machine Learning) by Hand, Mannila, and Smyth [HMS01], The Elements of Statistical Learning by Hastie, Tibshirani, and Friedman [HTF01], Data Mining: Introductory and Advanced Topics by Dunham, and Data Mining: Multimedia, Soft Computing, and Bioinformatics by Mitra and Acharya [MA03]. There are also books containing collections of papers on particular aspects of knowledge discovery, such as Machine Learning and Data Mining: Methods and Applications edited by Michalski, Brakto, and Kubat [MBK98], and Relational Data Mining edited by Dzeroski and Lavrac [De01], as well as many tutorial notes on data mining in major database, data mining and machine learning conferences.

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Data Mining: Concepts and Techniques (2nd edition)

In this paper, we review the background and state-of-the-art of big data. We first introduce the general background of big data and review related technologies, such as could computing, Internet of Things, data centers, and Hadoop. We then focus on the four phases of the value chain of big data, i.e., data generation, data acquisition, data storage, and data analysis. For each phase, we introduce the general background, discuss the technical challenges, and review the latest advances. We finally examine the several representative applications of big data, including enterprise management, Internet of Things, online social networks, medial applications, collective intelligence, and smart grid. These discussions aim to provide a comprehensive overview and big-picture to readers of this exciting area. This survey is concluded with a discussion of open problems and future directions.

Big Data: A Survey

R-trees: a Dynamic Index Structure for Spatial Searching

Location-based services (l-services for short) comprise an emerging application involving spatiotemporal databases. In this paper, we discuss this type of application in terms of database requirements and provide a set of ten benchmark database queries (plus two operations for loading and updating data). The list includes selection queries on stationary and moving reference objects, join queries and unary operations on trajectories of moving objects. We also survey recent work in query processing for those query types, with an emphasis on indexing moving objects, and suggest candidates for efficiently supporting databases for l-services.

Ten Benchmark Database Queries for Location-based Services

R-trees and related structures, like R+-trees and R*-trees, have been used to answer queries involving topological information about objects represented by their minimum bounding rectangles (MBRs) This paper describes how the R-tree method can be used for the storage and retrieval of direction relations Direction relations deal with order in space, as for instance, left, above, north, southeast etc In this paper we define direction relations between points and extend the definitions to relations between objects Then we present our tests regarding the retrieval of direction relations between objects using R-trees and discuss the representational properties of MBR approximations with respect to directions in 2D space

The Retrieval of Direction Relations using R-trees

Predominant smartphone OS localization subsystems currently rely on server-side localization processes, allowing the service provider to know the location of a user at all times. In this paper, we propose an innovative algorithm for protecting users from location tracking by the localization service, without hindering the provisioning of fine-grained location updates on a continuous basis. Our proposed Temporal Vector Map (TVM) algorithm, allows a user to accurately localize by exploiting a k-Anonymity Bloom (kAB) filter and a bestNeighbors generator of camouflaged localization requests, both of which are shown to be resilient to a variety of privacy attacks. We have evaluated our framework using a real prototype developed in Android and Hadoop HBase as well as realistic Wi-Fi traces scaling-up to several GBs. Our study reveals that TVM can offer fine-grained localization in approximately four orders of magnitude less energy and number of messages than competitive approaches.

/pdf/privacy-preserving-indoor-localization-on-smartphones-32h8e1i6g5.pdf

Privacy-preserving indoor localization on smartphones

Free Download R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Ebooks Yannis Manolopoulos, Alexandros Nanopoulos, Apostolos N. Papadopoulos, Yannis Theodoridis, Read Online R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) E-Books, PDF R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Free Download, Read Online R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Ebook Popular, R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Free Read Online, full book R-Trees: Theory And Applications (Advanced Information And Knowledge Processing), Download PDF R-Trees: Theory And Applications (Advanced Information And Knowledge Processing), book pdf R-Trees: Theory And Applications (Advanced Information And Knowledge Processing), Yannis Manolopoulos, Alexandros Nanopoulos, Apostolos N. Papadopoulos, Yannis Theodoridis ebook R-Trees: Theory And Applications (Advanced Information And Knowledge Processing), Read Online R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Book, Read Online R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) E-Books, Read R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Ebook Download, R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) PDF read online, R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Ebooks, R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Full Download, R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Free PDF Download, R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Free PDF Online, R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Books Online, R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Book Download, Free Download R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Books [E-BOOK] R-Trees: Theory And Applications (Advanced Information And Knowledge Processing) Full eBook,

Yannis Theodoridis

Papers

R-trees: a Dynamic Index Structure for Spatial Searching

Ten Benchmark Database Queries for Location-based Services

The Retrieval of Direction Relations using R-trees

Privacy-preserving indoor localization on smartphones

R-Trees: Theory and Applications (Advanced Information and Knowledge Processing)