This HTML5 document contains 54 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

PrefixIRI
dctermshttp://purl.org/dc/terms/
dbohttp://dbpedia.org/ontology/
foafhttp://xmlns.com/foaf/0.1/
n18https://infoscience.epfl.ch/record/33910/files/
n10https://global.dbpedia.org/id/
dbpedia-ruhttp://ru.dbpedia.org/resource/
dbthttp://dbpedia.org/resource/Template:
rdfshttp://www.w3.org/2000/01/rdf-schema#
freebasehttp://rdf.freebase.com/ns/
n15https://zenodo.org/record/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
owlhttp://www.w3.org/2002/07/owl#
dbpedia-zhhttp://zh.dbpedia.org/resource/
wikipedia-enhttp://en.wikipedia.org/wiki/
dbchttp://dbpedia.org/resource/Category:
dbphttp://dbpedia.org/property/
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
wikidatahttp://www.wikidata.org/entity/
dbrhttp://dbpedia.org/resource/

Statements

Subject Item
dbr:Continuous_wavelet_transform
dbo:wikiPageWikiLink
dbr:S_transform
Subject Item
dbr:Gabor_transform
dbo:wikiPageWikiLink
dbr:S_transform
Subject Item
dbr:Short-time_Fourier_transform
dbo:wikiPageWikiLink
dbr:S_transform
Subject Item
dbr:Wavelet_transform
dbo:wikiPageWikiLink
dbr:S_transform
Subject Item
dbr:S_transform
rdfs:label
S-преобразование S transform S轉換
rdfs:comment
S transform as a time–frequency distribution was developed in 1994 for analyzing geophysics data. In this way, the S transform is a generalization of the short-time Fourier transform (STFT), extending the continuous wavelet transform and overcoming some of its disadvantages. For one, modulation sinusoids are fixed with respect to the time axis; this localizes the scalable Gaussian window dilations and translations in S transform. Moreover, the S transform doesn't have a cross-term problem and yields a better signal clarity than Gabor transform. However, the S transform has its own disadvantages: the clarity is worse than Wigner distribution function and Cohen's class distribution function. S轉換(s-transform)是一種時頻分析的工具。 和其他時頻分析工具一樣，透過S轉換，我們可以同時從時域以及頻域觀察一個信號的能量分布。S轉換的特別之處在它既保持與傅立葉變換的直接關係，又可在不同頻率有不同的解析度。此外，S轉換與小波轉換（wavelet transform）有密切的關係，或可視為連續小波轉換（continuous wavelet transform）的變形。S轉換的清晰度略優於加伯轉換（Gabor transform），而不如韋格納分佈（Wigner distribution function）、科恩克萊斯分佈、（Modified Wigner distribution function）。 S-преобразова́ние — один из математических операционных методов отображения функции, зависящей от одной переменной, обычно от времени в частотно-временную область, разновидность оконного преобразования Фурье с гауссовской оконной функцией вида . S-преобразование имеет лучшее разрешение, чем , но уступает по разрешению преобразованию Вигнера и билинейному время-частотному преобразованию. Предложено в 1994 г. для анализа геофизических данных.
dcterms:subject
dbc:Integral_transforms dbc:Time–frequency_analysis dbc:Fourier_analysis
dbo:wikiPageID
1003410
dbo:wikiPageRevisionID
1087138710
dbo:wikiPageWikiLink
dbc:Integral_transforms dbc:Fourier_analysis dbr:Open_source_license dbr:Multiresolution_analysis dbr:Gaussian_function dbr:Short-time_Fourier_transform dbr:Bulletin_of_Earthquake_Engineering dbc:Time–frequency_analysis dbr:Magnetic_resonance_imaging dbr:Seismology dbr:Gabor_transform dbr:Laplace_transform dbr:Reflection_seismology dbr:Cohen's_class_distribution_function dbr:Wavelet_transform dbr:Fourier_transform dbr:Wigner_distribution_function dbr:Continuous_wavelet_transform
dbo:wikiPageExternalLink
n15:1302376%7C n18:RioulV91.pdf
owl:sameAs
dbpedia-zh:S轉換 n10:4uwRW wikidata:Q7395403 dbpedia-ru:S-преобразование freebase:m.03m3mxq
dbp:wikiPageUsesTemplate
dbt:Cite_journal dbt:About dbt:Citation_needed dbt:Doi dbt:Reflist
dbo:abstract
S-преобразова́ние — один из математических операционных методов отображения функции, зависящей от одной переменной, обычно от времени в частотно-временную область, разновидность оконного преобразования Фурье с гауссовской оконной функцией вида . S-преобразование имеет лучшее разрешение, чем , но уступает по разрешению преобразованию Вигнера и билинейному время-частотному преобразованию. Предложено в 1994 г. для анализа геофизических данных. В 2008 г. найден алгоритм быстрого S-преобразования, на несколько порядков сокращающий вычислительную сложность относительно прямого вычисления. Алгоритм быстрого S-преобразования свободно доступен по свободной лицензии. S轉換(s-transform)是一種時頻分析的工具。 和其他時頻分析工具一樣，透過S轉換，我們可以同時從時域以及頻域觀察一個信號的能量分布。S轉換的特別之處在它既保持與傅立葉變換的直接關係，又可在不同頻率有不同的解析度。此外，S轉換與小波轉換（wavelet transform）有密切的關係，或可視為連續小波轉換（continuous wavelet transform）的變形。S轉換的清晰度略優於加伯轉換（Gabor transform），而不如韋格納分佈（Wigner distribution function）、科恩克萊斯分佈、（Modified Wigner distribution function）。 S transform as a time–frequency distribution was developed in 1994 for analyzing geophysics data. In this way, the S transform is a generalization of the short-time Fourier transform (STFT), extending the continuous wavelet transform and overcoming some of its disadvantages. For one, modulation sinusoids are fixed with respect to the time axis; this localizes the scalable Gaussian window dilations and translations in S transform. Moreover, the S transform doesn't have a cross-term problem and yields a better signal clarity than Gabor transform. However, the S transform has its own disadvantages: the clarity is worse than Wigner distribution function and Cohen's class distribution function. A fast S transform algorithm was invented in 2010. It reduces the computational complexity from O[N2·log(N)] to O[N·log(N)] and makes the transform one-to-one, where the transform has the same number of points as the source signal or image, compared to storage complexity of N2 for the original formulation. An implementation is available to the research community under an open source license. A general formulation of the S transform makes clear the relationship to other time frequency transforms such as the Fourier, short time Fourier, and wavelet transforms.
prov:wasDerivedFrom
wikipedia-en:S_transform?oldid=1087138710&ns=0
dbo:wikiPageLength
12514
foaf:isPrimaryTopicOf
wikipedia-en:S_transform
Subject Item
dbr:Stockwell_transform
dbo:wikiPageWikiLink
dbr:S_transform
dbo:wikiPageRedirects
dbr:S_transform
Subject Item
wikipedia-en:S_transform
foaf:primaryTopic
dbr:S_transform