FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2004304892> ?p ?o ?g. }

• W2004304892 endingPage "34" @default.
• W2004304892 startingPage "27" @default.
• W2004304892 abstract "We tried to find discriminating features for sperm whale clicks in order to distinguish between clicks from different whales, or to enable unique identification. We examined two different methods to obtain suitable characteristics. First, a model based on the Gabor function was used to describe the dominant frequencies in a click, and then the model parameters were used as classification features. The Gabor function model was selected because it has been used to model dolphin sonar pulses with great precision. Additionally, it has the interesting property that it has an optimal time–frequency resolution. As such, it can indicate optimal usage of the sonar by sperm whales. Second, the clicks were expressed in a wavelet packet table, from which subsequently a local discriminant basis was created. A wavelet packet basis has the advantage that it offers a highly redundant number of coefficients, which allow signals to be represented in many different ways. From the redundant signal description a representation can be selected that emphasizes the differences between classes. This local discriminant basis is more flexible than the Gabor function, which can make it more suitable for classification, but it is also more complex. Class vectors were created with both models and classification was based on the distance of a click to these vectors. We show that the Gabor function could not model the sperm whale clicks very well, due to the variability of the changing click characteristics. Best performance was reached when three subsequent clicks were averaged to smoothen the variability. Around 70% of the clicks classified correctly in both the training and validation sets. The wavelet packet table adapted better to the changing characteristics, and gave better classification. Here, also using a 3-click moving average, around 95% of the training sets classified correctly and 78% of the validation sets. These numbers lowered by only a few per cent when single clicks, instead of a moving average, were classified. This indicates that, while the features may show too much variability to enable unique identification of individual whales on a click by click basis, the wavelet approach may be capable of distinguishing between a small group of whales." @default.
• W2004304892 created "2016-06-24" @default.
• W2004304892 creator A5010923700 @default.
• W2004304892 creator A5028826855 @default.
• W2004304892 creator A5050692040 @default.
• W2004304892 creator A5051765832 @default.
• W2004304892 creator A5067558921 @default.
• W2004304892 creator A5073312375 @default.
• W2004304892 creator A5076621957 @default.
• W2004304892 date "2007-02-01" @default.
• W2004304892 modified "2023-09-23" @default.
• W2004304892 title "A comparison of model and non-model based time-frequency transforms for sperm whale click classification" @default.
• W2004304892 cites W1556509470 @default.
• W2004304892 cites W1658679052 @default.
• W2004304892 cites W1766888123 @default.
• W2004304892 cites W1987180644 @default.
• W2004304892 cites W2010107012 @default.
• W2004304892 cites W2035239060 @default.
• W2004304892 cites W2071467620 @default.
• W2004304892 cites W2082845497 @default.
• W2004304892 cites W2089908537 @default.
• W2004304892 cites W2100544508 @default.
• W2004304892 cites W2146842127 @default.
• W2004304892 cites W2488895214 @default.
• W2004304892 cites W81187852 @default.
• W2004304892 doi "https://doi.org/10.1017/s0025315407049508" @default.
• W2004304892 hasPublicationYear "2007" @default.
• W2004304892 type Work @default.
• W2004304892 sameAs 2004304892 @default.
• W2004304892 citedByCount "11" @default.
• W2004304892 countsByYear W20043048922013 @default.
• W2004304892 countsByYear W20043048922015 @default.
• W2004304892 countsByYear W20043048922017 @default.
• W2004304892 countsByYear W20043048922018 @default.
• W2004304892 crossrefType "journal-article" @default.
• W2004304892 hasAuthorship W2004304892A5010923700 @default.
• W2004304892 hasAuthorship W2004304892A5028826855 @default.
• W2004304892 hasAuthorship W2004304892A5050692040 @default.
• W2004304892 hasAuthorship W2004304892A5051765832 @default.
• W2004304892 hasAuthorship W2004304892A5067558921 @default.
• W2004304892 hasAuthorship W2004304892A5073312375 @default.
• W2004304892 hasAuthorship W2004304892A5076621957 @default.
• W2004304892 hasBestOaLocation W20043048922 @default.
• W2004304892 hasConcept C106131492 @default.
• W2004304892 hasConcept C116834253 @default.
• W2004304892 hasConcept C119857082 @default.
• W2004304892 hasConcept C12426560 @default.
• W2004304892 hasConcept C134306372 @default.
• W2004304892 hasConcept C136902061 @default.
• W2004304892 hasConcept C142433447 @default.
• W2004304892 hasConcept C153180895 @default.
• W2004304892 hasConcept C154945302 @default.
• W2004304892 hasConcept C173149727 @default.
• W2004304892 hasConcept C18903297 @default.
• W2004304892 hasConcept C196216189 @default.
• W2004304892 hasConcept C2524010 @default.
• W2004304892 hasConcept C2776123653 @default.
• W2004304892 hasConcept C2777704720 @default.
• W2004304892 hasConcept C2778063876 @default.
• W2004304892 hasConcept C28490314 @default.
• W2004304892 hasConcept C31972630 @default.
• W2004304892 hasConcept C33923547 @default.
• W2004304892 hasConcept C41008148 @default.
• W2004304892 hasConcept C41771347 @default.
• W2004304892 hasConcept C46286280 @default.
• W2004304892 hasConcept C47432892 @default.
• W2004304892 hasConcept C55493867 @default.
• W2004304892 hasConcept C555745239 @default.
• W2004304892 hasConcept C5917680 @default.
• W2004304892 hasConcept C78397625 @default.
• W2004304892 hasConcept C86803240 @default.
• W2004304892 hasConceptScore W2004304892C106131492 @default.
• W2004304892 hasConceptScore W2004304892C116834253 @default.
• W2004304892 hasConceptScore W2004304892C119857082 @default.
• W2004304892 hasConceptScore W2004304892C12426560 @default.
• W2004304892 hasConceptScore W2004304892C134306372 @default.
• W2004304892 hasConceptScore W2004304892C136902061 @default.
• W2004304892 hasConceptScore W2004304892C142433447 @default.
• W2004304892 hasConceptScore W2004304892C153180895 @default.
• W2004304892 hasConceptScore W2004304892C154945302 @default.
• W2004304892 hasConceptScore W2004304892C173149727 @default.
• W2004304892 hasConceptScore W2004304892C18903297 @default.
• W2004304892 hasConceptScore W2004304892C196216189 @default.
• W2004304892 hasConceptScore W2004304892C2524010 @default.
• W2004304892 hasConceptScore W2004304892C2776123653 @default.
• W2004304892 hasConceptScore W2004304892C2777704720 @default.
• W2004304892 hasConceptScore W2004304892C2778063876 @default.
• W2004304892 hasConceptScore W2004304892C28490314 @default.
• W2004304892 hasConceptScore W2004304892C31972630 @default.
• W2004304892 hasConceptScore W2004304892C33923547 @default.
• W2004304892 hasConceptScore W2004304892C41008148 @default.
• W2004304892 hasConceptScore W2004304892C41771347 @default.
• W2004304892 hasConceptScore W2004304892C46286280 @default.
• W2004304892 hasConceptScore W2004304892C47432892 @default.
• W2004304892 hasConceptScore W2004304892C55493867 @default.
• W2004304892 hasConceptScore W2004304892C555745239 @default.
• W2004304892 hasConceptScore W2004304892C5917680 @default.
• W2004304892 hasConceptScore W2004304892C78397625 @default.

• next