Buscar
Mostrando ítems 61-70 de 140057
Joint analysis of time use and consumer expenditure data examination of two approaches to deriving values of time
(NATIONAL ACADEMY OF SCIENCES, 2011)
An efficient short-time Fourier transform algorithm for grinding wheel condition monitoring through acoustic emission
(2021-03-01)
Indirect methods to monitor the surface integrity of grinding wheels by acoustic emission (AE) have been proposed, aiming to ensure their optimal performance. However, the time-frequency analysis of the content of these ...
Synthetic Time Series Generation Model for Analysis of Power System Operation and Expansion with High Renewable Energy Penetration
(IEEE-Inst Electrical Electronics Engineers, 2021)
The increasing integration of renewable energy sources into current power systems has posed the challenge of adequately representing the statistical properties associated with their variable power generation. In this paper, ...
Fusing time, frequency and shape-related information: Introduction to the Discrete Shapelet Transform's second generation (DST-II)
(2018-05-01)
This article introduces the second generation of the Discrete Shapelet Transform (DST-II), a tool created for fusing three types of information: time, frequency and shape-related. Considered a particular Discrete Wavelet ...
The impact of commute time on the Gender wage gap: an empirical analysis
(2021)
The gender wage gap for the city of Santiago, Chile and its explained and unexplained
portions are analysed using the Oaxaca-Blinder decomposition with data from
CASEN 2017, the Chilean household survey. A novel feature ...
Effect of Frozen Storage Time on the Proteolysis of Soft Cheeses Studied by Principal Component Analysis of Proteolytic Profiles
(Wiley Blackwell Publishing, Inc, 2002-12)
Port Salut Argentino cheeses were frozen, stored in a freezer at −22 °C for different periods, and slowly thawed. After thawing, some cheeses were immediately sampled while others were sampled after different refrigerated ...
Time-frequency analysis combining wavelets and the envelope technique for fault identification in rotary machines
(2013-03-18)
Nowadays the method based on demodulation by envelope finds wide application in industry as a technique for evaluation of bearings and other components in rotating machinery. In recent years the application of Wavelets for ...