Context tree weighting

Context tree weighting

CTW (англ. Context Tree Weighting — взвешивание контекстного дерева) — алгоритм предсказания и сжатия без потерь, созданный Willems, Shtarkov, and Tjalkens (1995), «» . CTW является одним из немногих алгоритмов, которые обеспечивают как хорошие теоретические показатели, так и хорошо показывают себя на практике (например, см., Begleiter, El-Yaniv, and Yona (2004), «» ). При оценке вероятности символа алгоритм CTW с определённым весом смешивает статистику предсказаний многих моделей Маркова разного порядка, каждая из которых создаётся на основе условных вероятностных оценок нулевого порядка.

External links


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Полезное


Смотреть что такое "Context tree weighting" в других словарях:

  • Context tree weighting — The context tree weighting method (CTW) is a lossless compression and prediction algorithm by Willems, Shtarkov, and Tjalkens (1995) . The CTW algorithm is among the very few such algorithms that offer both theoretical guarantees and good… …   Wikipedia

  • Lossless data compression — is a class of data compression algorithms that allows the exact original data to be reconstructed from the compressed data. The term lossless is in contrast to lossy data compression, which only allows an approximation of the original data to be… …   Wikipedia

  • CTW — may refer to:* Sesame Workshop, formerly known as the Children s Television Workshop (or CTW) * CTW, the ICAO airline designator for Cargo Three, Panama * context tree weighting (CTW), a lossless compression and prediction algorithm * Conquer The …   Wikipedia

  • WOMAN — This article is arranged according to the following outline: the historical perspective biblical period marriage and children women in household life economic roles educational and managerial roles religious roles women outside the household… …   Encyclopedia of Judaism

  • Software quality — Contents 1 Motivation for Defining Software Quality 2 Definition 3 Alternative Approaches to Software Quality Defin …   Wikipedia

  • Many-worlds interpretation — The quantum mechanical Schrödinger s cat paradox according to the many worlds interpretation. In this interpretation every event is a branch point; the cat is both alive and dead, even before the box is opened, but the alive and dead cats are in… …   Wikipedia

  • Perl — This article is about the programming language. For other uses, see Perl (disambiguation). Perl Paradig …   Wikipedia

  • anthropology — anthropological /an threuh peuh loj i keuhl/, anthropologic, adj. anthropologically, adv. /an threuh pol euh jee/, n. 1. the science that deals with the origins, physical and cultural development, biological characteristics, and social customs… …   Universalium

  • Kalman filter — Roles of the variables in the Kalman filter. (Larger image here) In statistics, the Kalman filter is a mathematical method named after Rudolf E. Kálmán. Its purpose is to use measurements observed over time, containing noise (random variations)… …   Wikipedia

  • Sequence alignment — In bioinformatics, a sequence alignment is a way of arranging the sequences of DNA, RNA, or protein to identify regions of similarity that may be a consequence of functional, structural, or evolutionary relationships between the sequences.[1]… …   Wikipedia


Поделиться ссылкой на выделенное

Прямая ссылка:
… Нажмите правой клавишей мыши и выберите «Копировать ссылку»