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Wyszukujesz frazę "co−occurrence" wg kryterium: Temat


Tytuł:
Co-occurrence of particular meteorological elements in the region of Arctowski Station (King George Island, South Shetland Islands, in 1978)
Autorzy:
Kratke, Jolanta
Wielbińska, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/2058048.pdf
Data publikacji:
1981
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
meteorology
co-occurrence of meteorological elements
Źródło:
Polish Polar Research; 1981, 2, 3-4; 7-21
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Co-existence of physical activity (pa) and other energy-balance related behaviours among adolescents participating in pa intervention in Poland
Autorzy:
Zembura, Paweł
Gołdys, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/1055247.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
MVPA
cluster analysis
co-occurrence
screen time
sport intervention
Opis:
The aim of this study was to identify clusters based on four energy – balance related behaviours (EBRBs) – moderatevigorous physical activity, screen time, breakfast consumption and sweet drinks consumption – among adolescents participating in a governmental programme to increase their sport participation. The study was a part of the monitoring and evaluation process of a nationwide sport intervention in Poland. The sample consisted of 367 participants (180 females and 187 males, mean age 15.18 ±1.67). Data was self-reported. Based on combination of cluster analysis, a five-cluster solution was found the most suitable. Some patterns of EBRBs were similar to the results obtained in previous studies conducted on the general population on, for example “sedentarysnacking” or “all-round-healthy” clusters. The amount of the clusters which accumulated most of the negative or positive behaviours were small, and most clusters presented a mix of behavioural patterns influencing energy balance in both positive and negative ways. The structure of the clusters differed based on adolescents’ gender and, for male participants, fathers’ education (p < 0.05).
Źródło:
Central European Journal of Sport Sciences and Medicine; 2016, 16, 4; 43-54
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Co-occurrence analyzis of key concept on risk-taking in organizational management research
Autorzy:
Gorzeń-Mitka, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/1818468.pdf
Data publikacji:
2020-01-08
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
risk taking
risk management
co-occurrence analysis
network analysis
Opis:
Risk-taking is a pivotal feature of entrepreneurship and business development. Poor management of business risk often leads to the loss of competitiveness with the consequence of business failure, and in contrast, it improves business sustainability when risks are managed effectively. The aimof thisresearch is to identify leading concepts and trends in research on risk-taking in organizationalmanagement researchby network analysis of keywords co-occurrence. Mapping knowledge domain was used as a useful method in bibliometrics. We analyzed 2912 records from Scopus database to risk-taking in organizational management research with the help of VOSviewer software tool. In particular, keywords co-occurrence analysis to visually explore knowledge bases, topic distribution, research fronts and research trends in the field of risk-taking research in a management context were adopted.
Źródło:
Zeszyty Naukowe Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach; 2019, 48, 121; 19-30
2082-5501
Pojawia się w:
Zeszyty Naukowe Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corporate social responsibility knowledge base: A bibliometric analysis
Autorzy:
Nyabakora, Wakara Ibrahimu
Mohabir, Sarah Elizabeth
Powiązania:
https://bibliotekanauki.pl/articles/36098983.pdf
Data publikacji:
2024
Wydawca:
Fundacja Naukowa Instytut Współczesnych Finansów
Tematy:
Citation analysis
co-occurrence
corporate social responsibility
CSR
VOSviewer
Opis:
This research aims to analyze the current landscape of Corporate social responsibility (CSR) research. Using the Scopus database, the study employed the PRISMA sampling technique and analyzed 3679 articles using the VOSviewer program. The results show the emergence of CSR research in 1989, with a notable focus on topics such as corporate performance, corporate governance, family business, and socially responsible investment. We also find no evidence of a relationship between the number of an author's articles and the number of citations. Moreover, CSR research is largely monopolized by developed countries, leaving developing economies in the dark. Our study provides valuable insights into the past, present, and future trajectories of CSR research.
Źródło:
Modern Finance; 2024, 2, 1; 101-120
2956-7742
Pojawia się w:
Modern Finance
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Stability of Classical Taxonomy Bagging Metod with Bagging Based on Co-Occurence Data
Porównanie stabilności klasycznej taksonomicznej metody bagging z metodą bagging opartą na macierzy współwystąpień
Autorzy:
Rozmus, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/906849.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Cluster analysis
Cluster ensemble
Stability
Bagging in taxonomy
Co-occurrence matrix.
Opis:
Ensemble approach has been successfully applied in the context of supervised learning to increase the accuracy and stability of classification. Recently, analogous techniques for cluster analysis have been suggested in order to increase classification accuracy, robustness and stability of the clustering solutions. Research has proved that, by combining a collection of different clusterings, an improved solution can be obtained. The stability of a clustering algorithm with respect to small perturbations of data (e.g., data subsampling or small variations in the feature values) or the parameters of the algorithm (e.g., random initialization) is a desirable quality of the algorithm. On the other hand, ensembles benefit from diverse clusterers. Although built upon unstable components, the ensemble is expected to be more accurate and robust than the individual clustering method. Here, we look at the stability of the ensemble methods based on bagging idea and co-occurrence matrix. This paper carries out an experimental study to compare stability of bagging method used to the classical data set with bagging based on co-occurrence matrix.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2012, 269
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aspects of gestural alignment in task-oriented dialogues
Autorzy:
Karpiński, Maciej
Czoska, Agnieszka
Jarmołowicz-Nowikow, Ewa
Juszczyk, Konrad
Klessa, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/677182.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Slawistyki PAN
Tematy:
communicative alignment
intercultural communication
multimodal interactions
gesture function
gesture re-occurrence
gesture co-occurrence
Opis:
Aspects of gestural alignment in task-oriented dialoguesInterlocutors in a conversation influence each other in a number of dimensions. This process may lead to observable changes in their communicative behaviour. The directions and profiles of these changes are often correlated with the quality of interaction and may predict its success. In the present study, the gestural component of communication is scrutinised for changes that may reflect the process of alignment. Two types of task-oriented dialogues between teenagers are recorded and annotated for gestures and their features. We hypothesize that the dialogue task type (collaborative vs. competitive), as well as certain culture-specific properties of alignment that differ between German and Polish pairs, may significantly influence the process of communication. In order to explore the data and detect tendencies in gestural behaviour, automatised annotation mining and statistical exploration have been used, including a moving frame approach aimed at the investigation of co-occurring strokes as well as re-occurring strokes and their features. Significant differences between German and Polish speakers, as well as between the two dialogue types, have been found in the number of gestures, stroke duration and amplitude. Aspekty wzajemnego dopasowania gestykulacji w dialogach zadaniowychUczestnicy konwersacji wpływają na siebie wzajemnie w wielu różnych wymiarach. Proces ten może prowadzić do obserwowalnych zmian w ich zachowaniach komunikacyjnych. Kierunek i charakter tych zmian często wiążą się z jakością interakcji i mogą pozwolić przewidzieć jej sukces. Celem niniejszego badania jest eksploracja gestowego składnika komunikacji pod kątem zjawisk, które mogą odzwierciedlać zjawisko wzajemnego dopasowania uczestników. Zarejestrowano dwa typy dialogów zadaniowych z udziałem nastolatków. Nagrania anotowano pod kątem gestów i ich cech. W badaniu postawiono hipotezę, iż typ zadania dialogowego (ukierunkowane na współpracę vs. na konkurencję), jak również pewne specyficzne cechy kulturowe dopasowania komunikacyjnego, które różnicują polskie i niemieckie pary rozmówców, mogą oddziaływać na proces komunikacji. W celu eksploracji danych oraz wykrycia tendencji cechujących zachowania gestowe, wykorzystano zautomatyzowane metody analizy anotacji oraz techniki statystyczne. Uwzględniono podejście oparte na ruchomych oknach czasowych, umożliwiające analizę współwystępowania jak i powtarzania gestów właściwych i ich właściwości. Wykazano istotne różnice między rozmówcami polskimi i niemieckimi oraz między typami zadań dialogowych w zakresie liczby gestów, czasu trwania oraz amplitudy gestu właściwego.
Źródło:
Cognitive Studies; 2018, 18
2392-2397
Pojawia się w:
Cognitive Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Selected Soil Saprophytic Fungi on the Population of Nematodes Heterodera schachtii Schmidt
Wpływ wybranych grzybów glebowych na populację nicieni Heterodera schachtii Schmidt
Autorzy:
Kaup, G.
Dzięgielewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/389714.pdf
Data publikacji:
2009
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
współwystepowanie nicieni i grzybów saprofitycznych
Heterodera schachtii
Aspergillus versicolor
Trichocladium asperum
co-occurrence
Opis:
Pot experiments were carried out in 2005-2006. In the first year of the experiment microorganisms were introduced into soil. In the following year the innoculum was not repeated. The goal of the present work was to determine the influence of saprophytic fungi of Aspergillus versicolor and Trichocladium asperum on the population of Heterodera schachtii in the second year of the research. The following parameters were taken into account in the interpretation of the experiment: the concentration of H. schachtii cysts in 100 g of soil, the concentration of eggs and larvae in l g of soil and the fertility of females. The research was carried out in accordance with the rules adopted in nematology. At the co-occurrence of H. schachtii and saprophytic fungi of Aspergillus versicolor and Trichocladium asperum, in comparison with the test combination (H. schachtii without microorganisms), a smaller number of cysts in 100 g of soil, considerably higher fertility of females (the number of eggs and larvae in a cyst) and significantly higher concentration of eggs and larvae in soil were noted.
W latach 2005-2006 przeprowadzono badania wazonowe. W pierwszym roku doświadczenia wprowadzono do podłoża badane mikroorganizmy, w roku kolejnym nie ponawiano inokulum. Celem pracy było określenie wpływu grzybów saprofitycznych Aspergillus versicolor oraz Trichocladium asperum na populację Heterodera schachtii w drugim roku badań. W interpretacji doświadczenia uwzględniono następujące parametry: zagęszczenie cyst H. schachtii w glebie, zagęszczenie jaj i larw w l g gleby oraz płodność samic. Przy współwystępowaniu H. schachtii z grzybami saprofitycznymi Aspergillus versicolor oraz Trichocladium asperum w porównaniu do kombinacji kontrolnej (H. schachtii bez mikroorganizmów) znaleziono mniejszą liczbę cyst w 100 g gleby, znacznie większą płodność samic (liczba jaj i larw w cyście) oraz większe zagęszczenie jaj i larw w glebie.
Źródło:
Ecological Chemistry and Engineering. A; 2009, 16, 7; 797-801
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The application of volume texture extraction to three-dimensional seismic data – lithofacial structures exploration within the Miocene deposits of the Carpathian Foredeep
Autorzy:
Łukaszewski, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1841768.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Carpathian Foredeep
channel system
seismic attributes
machine learning
Grey Level Co-occurrence Matrix
Opis:
There are numerous conventional fields of natural gas in the Carpathian Foredeep, and there is also evidence to suggest that unconventional gas accumulations may occur in this region. The different seismic signatures of these geological forms, the small scale of amplitude variation, and the large amount of data make the process of geological interpretation extremely time consuming. Moreover, the dispersed nature of information in a large block of seismic data increasingly requires automatic, self-learning cognitive processes. Recent developments with Machine Learning have added new capabilities to seismic interpretation, especially to multi-attribute seismic analysis. Each case requires a proper selection of attributes. In this paper, the Grey Level Co-occurrence Matrix method is presented and its two texture attributes: Energy and Entropy. Haralick’s two texture parameters were applied to an advanced interpretation of the interval of Miocene deposits in order to discover the subtle geological features hidden between the seismic traces. As a result, a submarine-slope channel system was delineated leading to the discovery of unknown earlier relationships between gas boreholes and the geological environment. The Miocene deposits filling the Carpathian Foredeep, due to their lithological and facies diversity, provide excellent conditions for testing and implementing Machine Learning techniques. The presented texture attributes are the desired input components for self-learning systems for seismic facies classification.
Źródło:
Geology, Geophysics and Environment; 2020, 46, 4; 301-313
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The latest streams of research on communication in risk management: a large-scale literature review based on co-occurrence data
Autorzy:
Gorzeń-Mitka, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/1844921.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
risk management
communication
co-occurrence analysis
literature review
zarządzanie ryzykiem
komunikacja
analiza współwystępowania
przegląd literatury
Opis:
Purpose: The scientific research on risk management has grown substantially over the past years. Communication on risk is central to the risk management strategy. As indicated by many researchers, communication is one of the key components of a successful risk management framework but, on the other hand, it is one of main categories of disruption and inefficiency in risk management process. Design/methodology/approach: The research aim is identification of the latest streams of research that concern communication in risk management by knowledge mapping and it provides a visualization reference in this research field. Some series of published papers on communication aspects in risk management in Scopus database from 2000 to 2018 were extracted. Then, based on the co-occurrence frequencies of key terms, mapping is done and clustering keywords are extracted by using VOSviewer software. Findings: The main research conclusions are as follows: (1) that communication studies are developing rapidly in the global academic community, (2) the frontier topics in this study consist of seven representative areas concentrated in main keywords like risk assessment, project management, risk perception, decision making, information management, risk analysis, disasters, and information technology, (3) the latest trends in research on communication aspects in risk management mainly include leadership context, climate change (especially regarding floods), food safety, corporate social responsibility, social media, and construction project. Research limitations/implications: This study investigated only leading trends in this area and identified selected challenges in an exploratory way. Practical implications: (not applicable). Social implications: (not applicable). Originality/value: This paper delivers an outline for main research trends in risk communication process within organisation
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2020, 149; 219-236
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Co-occurrence of pathogenic and non-pathogenic Fusarium decemcellulare and Lasiodiplodia theobromae isolates in cushion galls disease of cacao (Theobroma cacao L.)
Autorzy:
Castillo,del, D.S.
Parra, D.
Noceda, C.
Perez-Martinez, S.
Powiązania:
https://bibliotekanauki.pl/articles/66527.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
co-occurrence
pathogenic fungi
non-pathogenic microorganism
Fusarium decemcellulare
Lasiodiplodia theobromae
isolate
fungi
gall disease
cacao
Theobroma cacao
Opis:
Flowery cushion gall of cacao is a disease complex with six types. Fusarium decemcellulare have been isolated from both flowery and green point galls and recognized as the etiological agent of the disease. In the present work we: i) identified by ITS-rDNA sequencing and/or taxonomy the cultivable fungal species or Operative Taxonomic Units (OTUs) associated with the five symptoms of cushion galls in cacao from Venezuela, and ii) determined the gall inducing capacity on cacao peeled seeds after 45 days of inoculation with suspensions of mycelia/ spores from distinct isolate types. The whole isolate collection rendered an abundance of 113 isolates with a richness of 39 OTUs (27) and eight identified at the species or genera levels, respectively, and in unidentified fungi. The dominant recovered species (≈36%) were F. decemcellulare and Lasiodiplodia theobromae. Some isolates of F. decemcellulare, L. theobromae, F. equiseti, Fusarium spp., F. solani, F. incarnatum, Rhizocthonia solani and Penicillium sp. were pathogenic. Some other isolates of the first six mentioned taxa behave as non-pathogenic. Furthermore, pathogenic and non-pathogenic isolates can also co-occur within a single plant and gall type. Moreover, 2–5 species within a single gall symptom in a single tree were identified (not necessarily at the same point in the tree), indicating a broad diversity of co-occurring taxa.
Źródło:
Journal of Plant Protection Research; 2016, 56, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Co-occurrence of airborne allergenic pollen grains and fungal spores in Rzeszow, Poland (2000-2002)
Współwystępowanie alergennych ziaren pyłku i zarodników grzybów w powietrzu Rzeszowa, Polska (2000-2002)
Autorzy:
Kasprzyk, I.
Powiązania:
https://bibliotekanauki.pl/articles/27111.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
co-occurrence
airborne pollen
allergenic pollen
pollen season
pollen grain
fungal spore
Rzeszow city
Polska
2000-2002 period
threshold value
Opis:
The co-occurrence of airborne allergenic pollen grains and fungal spores was estimated in Rzeszów in the years 2000- 2002. The volumetric method was used in this aerobiological study. Six taxa of pollen grains and fi ve types of fungal spores characterized by strong allergenicity and/or high concentrations in the air were analyzed. The time series of pollen grains and fungal spores were compared using PCA analysis. The periods of the greatest concentrations of tree pollen did not coincide with similar periods for herbaceous plants and fungal spores. From February to mid-March, Alnus pollen dominated in the air. The second period was characterized by Betula pollen. It occurred in April. Herbaceous pollen and fungal spores occurred in the air simultaneously (from mid May to the end of August), creating a risky situation for sensitized people. The periods of the highest concentrations of Epicoccum and Ganoderma fungal spores did not coincide with the same period for the examined plant taxa. In Rzeszów the probability of becoming exposed to very high concentrations of allergenic pollen and fungal spores at the same time was high, especially in July, when the highest concentrations of Poaceae, Alternaria and Cladosporium were noted. The hypersensitivity to only one plant or fungal allergen is rarely encountered. Under the present scenarios of global warming, pollen seasons of many taxa will be longer and sufferers will have year-long symptoms.
Współwystępowanie alergizującego pyłku roślin oraz zarodników grzybów w powietrzu Rzeszowa badano przez okres 3 lat (2000-2002). Pomiary przeprowadzono metodą wolumetryczną. Do analizy wybrano sześć taksonów ziaren pyłku i pięć typów zarodników grzybów charakteryzujących się silną alergennością i/lub wysokimi stężeniami w powietrzu. Taksony, których okresy maksymalnych stężeń pokrywały się, zostały grupowane na podstawie analizy PCA. Na podstawie dendrogramu (metoda ConsLink) wyznaczono okresy charakteryzujące się podobieństwem przebiegu sezonów pyłkowych analizowanych taksonów. Od lutego do marca w powietrzu dominował pyłek olszy (Alnus), w kwietniu brzozy (Betula). Okres maksymalnych koncentracji pyłku drzew w powietrzu nie pokrywał się z podobnym okresem roślin zielnych i zarodników grzybów. Sezony pyłkowe roślin zielnych i okresy występowania maksymalnych stężeń zarodników grzybów pokrywały się w czasie (od maja do sierpnia). Według obecnych prognoz, na skutek ocieplania się klimatu, sezony pyłkowe będą się wydłużać. Ponieważ rzadko stwierdza się nadwrażliwość tylko na jeden alergen roślinny lub grzybowy okres zagrożenia dla alergików może znacząco się wydłużyć.
Źródło:
Acta Agrobotanica; 2008, 61, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cloud manufacturing: a service-oriented manufacturing paradigm. A review paper
Autorzy:
Siderska, J.
Jadaan, K. S.
Powiązania:
https://bibliotekanauki.pl/articles/125586.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
cloud manufacturing
concept
co-occurrence
service-oriented
manufacturing resources
paradigm
produkcja w chmurze
pojęcie
współwystępowanie
zorientowanie na usługi
zasoby produkcyjne
paradygmat
Opis:
This paper introduces cloud manufacturing (CMfg) as a new manufacturing paradigm that joins the emerging technologies – such as the Internet of Things, cloud computing, and service-oriented technologies – for solving complex problems in manufacturing applications and performing large-scale collaborative manufacturing. Using scientific publications indexed in Scopus database during the period 2012–2017, the concept and fundamentals of CMfg are presented and discussed given the results of the most recent research. While focusing on the current state of the art, the recent research trends within CMfg concept were also identified. The review involved the methods of bibliometric analysis and network analysis. A prototype of CMfg and the existing related work conducted by various researchers are presented, and the map of co-occurrence is introduced to indicate the most commonly occurring issues related to the “cloud manufacturing” term. The VOSviewer software was used for this purpose. Finally, cloud-based manufacturing areas for further research are identified.
Źródło:
Engineering Management in Production and Services; 2018, 10, 1; 22-31
2543-6597
2543-912X
Pojawia się w:
Engineering Management in Production and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aquatic snails of tributaries to the Narew River
Autorzy:
Lewin, I.
Powiązania:
https://bibliotekanauki.pl/articles/84271.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
aquatic snail
snail
tributary
Narew River
species composition
malacofauna
bottom deposit
malacocenosis
Bithynia tentaculata
Lymnaea peregra
Lymnaea stagnalis
Physa fontinalis
Viviparus viviparus
co-occurrence
Źródło:
Folia Malacologica; 1999, 07, 4
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust content-based image retrieval using ICCV, GLCM, and DWT-MSLBP descriptors
Autorzy:
Chavda, Sagar
Goyani, Mahesh
Powiązania:
https://bibliotekanauki.pl/articles/27312841.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
content-based image retrieval
improved color coherence vector
gray-level co-occurrence matrix
discrete wavelet transform
multi-scale local binary pattern
principal component analysis
linear discriminant analysis
Opis:
Content-based image retrieval (CBIR) retrieves visually similar images from a dataset based on a specified query. A CBIR system measures the similarities between a query and the image contents in a dataset and ranks the dataset images. This work presents a novel framework for retrieving similar images based on color and texture features. We have computed color features with an improved color coherence vector (ICCV) and texture features with a gray-level co-occurrence matrix (GLCM) along with DWT-MSLBP (which is derived from applying a modified multi-scale local binary pattern [MS-LBP] over a discrete wavelet transform [DWT], resulting in powerful textural features). The optimal features are computed with the help of principal component analysis (PCA) and linear discriminant analysis (LDA). The proposed work uses a variancebased approach for choosing the number of principal components/eigenvectors in PCA. PCA with a 99.99% variance preserves healthy features, and LDA selects robust ones from the set of features. The proposed method was tested on four benchmark datasets with Euclidean and city-block distances. The proposed method outshines all of the identified state-of-the-art literature methods.
Źródło:
Computer Science; 2022, 23 (1); 5--36
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extraction of Polish noun senses from large corpora by means of clustering
Autorzy:
Broda, B.
Piasecki, M.
Szpakowicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/969804.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
corpus linguistics
semantic similarity
Polish nouns
word clustering
Clustering by Committee
co-occurrence retrieval models
rank weight function
Polish WordNet
WordNet-based synonymy test
document clustering
keywords extraction
Opis:
We investigate two methods of identifying noun senses, based on clustering of lemmas and of documents. We have adapted to Polish the well-known algorithm of Clustering by Committee, and tested it on very large Polish corpora. The evaluation by means of a WordNet-based synonymy test used Polish wordnet (plWordNet 1.0). Various clustering algorithms were analysed for the needs of extraction of document clusters as indicators of the senses of words which occur in them. The two approaches to wordsense identification have been compared, and conclusions drawn.
Źródło:
Control and Cybernetics; 2010, 39, 2; 401-420
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł

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