Results 1 to 10 of about 448,842 (149)
Optimising Time-Frequency Distributions: A Surface Metrology Approach [PDF]
Sensors, 2023 Time-frequency signal processing offers a significant advantage over temporal or frequency-only methods, but representations require optimisation for a given signal. Standard practice includes choosing the appropriate time-frequency distribution and fine-
Damir Malnar, Miroslav Vrankic
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Method for Automatic Estimation of Instantaneous Frequency and Group Delay in Time–Frequency Distributions with Application in EEG Seizure Signals Analysis [PDF]
Sensors, 2023 Instantaneous frequency (IF) is commonly used in the analysis of electroencephalogram (EEG) signals to detect oscillatory-type seizures. However, IF cannot be used to analyze seizures that appear as spikes.
Vedran Jurdana +3 more
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Intraspecific body size frequency distributions of insects. [PDF]
PLoS ONE, 2011 Although interspecific body size frequency distributions are well documented for many taxa, including the insects, intraspecific body size frequency distributions (IaBSFDs) are more poorly known, and their variation among mass-based and linear estimates ...
E Jeanne Gouws +2 more
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Rank distributions: Frequency vs. magnitude. [PDF]
PLoS ONE, 2017 We examine the relationship between two different types of ranked data, frequencies and magnitudes. We consider data that can be sorted out either way, through numbers of occurrences or size of the measures, as it is the case, say, of moon craters ...
Carlos Velarde, Alberto Robledo
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Meteorologische Zeitschrift, 2023 The geostrophic wind, representing the horizontal pressure gradient as driving force of motion, is often taken as a first guess of the actual wind. There is, however no fixed relation between them but depends on various influencing factors.
Burghard Brümmer
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Gearbox Fault Diagnosis Using Multiscale Sparse Frequency-Frequency Distributions
IEEE Access, 2021 Gear fault related information is distributed over a broad frequency band, indicating a complex modulation mechanism. It is difficult to detect early-stage gear faults accurately by detecting fault frequencies in a limited frequency band.
Luke Zhang +7 more
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New Time-Frequency Distribution [PDF]
Circuits, Systems, and Signal Processing, 1995 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Pei, Soo-Chang, Tsai, Er-Jung
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Frequency distributions: from the sun to the earth [PDF]
Nonlinear Processes in Geophysics, 2011 The space environment is forever changing on all spatial and temporal scales. Energy releases are observed in numerous dynamic phenomena (e.g. solar flares, coronal mass ejections, solar energetic particle events) where measurements provide signatures of
N. B. Crosby
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Establishing a Risk Profile for New Zealand Pastoral Farms
Agriculture, 2017 In this paper, the risk profile of two pastoral production systems in New Zealand are examined. All farmers must manage and mitigate a multitude of risks. Traditionally, a farm budget is solely undertaken to satisfy a lending institution.
Miles Grafton, Michael Manning
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Distribuição espacial de cupinzeiros epígeos de pastagem no município de Iporá-GO, Brasil
EntomoBrasilis, 2011 Cupins (Isoptera) são insetos sociais que vivem agrupados em cupinzeiros com elevada densidade, o que dificulta a estimativa de parâmetros populacionais, por isso, a abundância de cupins é feita pela contagem de ninhos. O objetivo foi estimar o padrão de
Hélida Cunha
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