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Journal articles on the topic 'Periodograma'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Milanović, Mladen, Milan Gocić, Lazar Velimirović, and Slaviša Trajković. "PRIMENA FURIJEOVIH TRANSFORMACIJA ZA PREDSTAVLJANJE VREMENSKIH SERIJA PADAVINA NA TERITORIJI NIŠA." Nauka+Praksa 17 (October 10, 2014): 21–25. http://dx.doi.org/10.62683/nip17.21-25.

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Padavine predstavljaju najvarijabilniji klimatski parametar u prostoru i vremenu. Svaka promena padavina direktno se odražava na stanje klime. Uspešno praćenje i analiziranje padavina predstavlja jedan od značajnijih koraka u sagledavanju promena klime. U radu su analizirane godišnje padavine na teritoriji grada Niša za period od 1946. do 2011. godine, uz pomoć Furijeovih transformacija i periodograma. Periodogram se koristi sa ciljem definisanja periodičnosti, odnosno određivanja intenziteta periodičnosti u definisanim frekvencijama. Periodogram za posmatrani period pokazuje da nema značajnih

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Méndez, A., and R. E. Rodriguez. "Microwave fluctuations associated with the October 19, 1989 solar flare." Geofísica Internacional 36, no. 3 (1997): 207–13. http://dx.doi.org/10.22201/igeof.00167169p.1997.36.3.660.

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Se estudiaron las observaciones de fluctuaciones en las microondas solares en 15.0 GHz, 9.5 GHz y 6.7 GHz en la estación de Cuba desde 3 días antes hasta un día después de la ráfaga solar 4B/X13 del 19 de octubre de 1989. Los periodogramas muestran un desplazamiento del periodo principal de 60 a 80 minutos y un aumento en la amplitud del periodo de 20 minutos comparado con el periodograma del 4 de octubre de 1989. La evolución temporal de cada frecuencia muestra una estabilidad mayor en la señal de 6.7 GHz y en los días cercanos ala rafaga. Las fluctuaciones se atribuyen a un flujo descendente

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Trevisan, Elma Suema, Reinaldo Castro Souza, and Leonardo Rocha Souza. "Estimação do parâmetro "d " em modelos arfima." Pesquisa Operacional 20, no. 1 (2000): 73–82. http://dx.doi.org/10.1590/s0101-74382000000100008.

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Os modelos ARFIMA caracterizam-se por sua longa dependência e por possuírem o parâmetro d do modelo ARIMA (grau de diferenciação) assumindo valores fracionários. Quando no caso d <FONT FACE=Symbol>Î</FONT> (-0,5; 0,5), há estacionariedade. A longa dependência aparece quando d é positivo. Este trabalho visa testar e comparar duas metodologias para o processo de estimação de d, baseadas na função Periodograma e na função Periodograma Suavizado. Através de séries sintéticas geradas para este fim, foram realizadas simulações em quatro diferentes estruturas ARFIMA, a saber : (0,d,0), (1

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4

Delgado R., J. Alberto. "Análisis del electroencefalograma con transformada de Fourier y modelos paramétricos." Ingeniería e Investigación, no. 23 (March 1, 1991): 7–13. http://dx.doi.org/10.15446/ing.investig.n23.20673.

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El análisis tradicional del electroencefalograma (EEG) se realiza en el tiempo. Para ello se selecciona una sección del registro donde la contaminación es baja y posteriormente se cuenta el número de picos. Con el propósito de mejorar el estudio del EEG reduciendo el factor subjetivo, se han aplicado dos técnicas para el análisis espectral. La primera se refiere a la Transformada de Fourier y el periodograma modificado; la segunda ajusta un modelo Autorregisivo (AR) al EEG y con base en este se obtiene un estimador de la densidad espectral. Adicionalmente, los parámetros del AR permiten monito

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Azimmohseni, Majid, Ahmad Reza Soltani, Mahnaz Khalafi, and Naeemeh Akbari Ghalesary. "A consistent estimator for spectral density matrix of a discrete time periodically correlated process." Probability and Mathematical Statistics 38, no. 1 (2018): 225–42. http://dx.doi.org/10.19195/0208-4147.38.1.12.

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In this article, we introduce a weighted periodogram in the class of smoothed periodograms as a consistent estimator for the spectral density matrix of a periodically correlated process. We derive its limiting distribution that appears to be a certain finite linear combination of Wishart distribution. We also provide numerical derivations for our smoothed periodogram and exhibit its asymptotic consistency using simulated data.

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Rocha, Mariana Yolanda de Castro, and Sonia Trannin de Mello. "É possível verificar relações entre baixa visão e padrões de sono por meio de actigrafia? Relato de caso de uma paratleta." Saúde e Pesquisa 13, no. 3 (2020): 687–96. http://dx.doi.org/10.17765/2176-9206.2020v13n3p687-696.

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Verificar se a actigrafia permite estabelecer relações entre baixa visão e distúrbios do sono em uma paratleta. Utilizamos questionários, diário do sono e actígrafo durante 30 dias. Mostrou-se indiferente para o perfil circadiano com preferência de treinos vespertinos e má qualidade subjetiva do sono. Periodograma com ritmo circadiano e actograma evidenciando irregularidades nos horários para dormir e acordar aos finais de semana, com períodos de repouso diurno ao longo da semana. Média de sono foi de 06h30m com seis despertares por noite. Verificamos que ambiente, hábitos e rotinas contribuír

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Gondhalekar, Yash, Eric D. Feigelson, Gabriel A. Caceres, Marco Montalto, and Snehanshu Saha. "A Study of Two Periodogram Algorithms for Improving the Detection of Small Transiting Planets." Astrophysical Journal Letters 959, no. 2 (2023): L16. http://dx.doi.org/10.3847/2041-8213/ad0844.

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Abstract The sensitivities of two periodograms are compared for weak signal planet detection in transit surveys: the widely used Box Least Squares (BLS) algorithm following light curve detrending and the Transit Comb Filter (TCF) algorithm following autoregressive ARIMA modeling. Small depth transits are injected into light curves with different simulated noise characteristics. Two measures of spectral peak significance are examined: the periodogram signal-to-noise ratio (S/N) and a false alarm probability (FAP) based on the generalized extreme value distribution. The relative performance of t

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Anchieta, David C., and John R. Buck. "Improving the robustness of spectral estimation to loud transients with a truncated order statistics filter." Journal of the Acoustical Society of America 152, no. 4 (2022): A143. http://dx.doi.org/10.1121/10.0015832.

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Underwater acoustic recordings often include loud transients from human or natural sources. The transients cause a positive bias for Welch's average periodogram spectral estimator when estimating the power spectral density of the background environment. Estimators based on single order statistics (e.g., the sample median) avoid the bias caused by outliers at the cost of a higher variance than the sample mean. Schwock and Abadi (2021) showed that, for exponential random variables, the estimator based on the 80th sample percentile has the lowest variance among any unbiased estimator based on a s

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Martic-Bursac, Natasa, Branislav Bursac, Vladan Ducic, et al. "The impact of Mediterranean oscillations on periodicity and trend of temperature in the valley of the Nisava River: A fourier and wavelet approach." Thermal Science 21, no. 3 (2017): 1389–98. http://dx.doi.org/10.2298/tsci160201229m.

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Periodicity of temperature on three stations in the Nisava River valley in period 1949-2014, has been analyzed by means of Fourier and wavelet transforms. Combined periodogram based on fast Fourier transform shows considerable similarity among individual series and identifies significant periods on 2.2, 2.7, 3.3, 5, 6-7, and 8.2 years in all datasets. Wavelet coherence analysis connects strongest 6-7 years spectral component to Mediterranean oscillation, starting in 1980s. Combined periodogram of Mediterranean oscillation index reveals 6-7 years spectral component as a dominant mode in period

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Delisle, J. B., N. Hara, and D. Ségransan. "Efficient modeling of correlated noise." Astronomy & Astrophysics 635 (March 2020): A83. http://dx.doi.org/10.1051/0004-6361/201936905.

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Periodograms are common tools used to search for periodic signals in unevenly spaced time series. The significance of periodogram peaks is often assessed using false alarm probability (FAP), which in most studies assumes uncorrelated noise and is computed using numerical methods such as bootstrapping or Monte Carlo. These methods have a high computational cost, especially for low FAP levels, which are of most interest. We present an analytical estimate of the FAP of the periodogram in the presence of correlated noise, which is fundamental to analyze astronomical time series correctly. The anal

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Nair, Achuthsankar S., and T. Mahalakshmi. "Are Categorical Periodograms and Indicator Sequences of Genomes Spectrally Equivalent?" In Silico Biology: Journal of Biological Systems Modeling and Multi-Scale Simulation 6, no. 3 (2006): 215–22. https://doi.org/10.3233/isb-00234.

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This paper reports a novel symbol-to-signal mapping for DNA sequences, based on the concept of categorical periodograms. A categorical periodogram is a numeric sequence with the n-th element of the sequence indicating the number of occurrences of cycles with period n in it. The period of the cycle is defined as the number of intervening events plus one. Spectral analysis studies have been conducted on Cumulative Categorical Periodogram (CCP) of 10 genes from the data set of Burset and Guigo. It is observed that the spectral signatures in CCP are functionally equivalent to the established N/3 p

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Petrosky, Evan, Hsiang-Chih Hwang, Nadia L. Zakamska, Vedant Chandra, and Matthew J. Hill. "Variability, periodicity, and contact binaries in WISE." Monthly Notices of the Royal Astronomical Society 503, no. 3 (2021): 3975–91. http://dx.doi.org/10.1093/mnras/stab592.

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ABSTRACT The time-series component of Wide-field Infrared Survey Explorer (WISE) is a valuable resource for the study of variable objects. We present an analysis of an all-sky sample of ∼450 000 AllWISE+NEOWISE infrared light curves of likely variables identified in AllWISE. By computing periodograms of all these sources, we identify ∼56 000 periodic variables. Of these, ∼42 000 are short-period (P &lt; 1 d), near-contact, or contact eclipsing binaries, many of which are on the main sequence. We use the periodic and aperiodic variables to test computationally inexpensive methods of periodi

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Tugbaeva, A. S., A. G. Itskov, V. N. Milich, and V. A. Shirokov. "Underwater Object Identification by Means of Reflected Sonar Signals." Intellekt. Sist. Proizv. 21, no. 4 (2023): 31–41. http://dx.doi.org/10.22213/2410-9304-2023-4-31-41.

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The paper presents the research results of the underwater object identification method on the basis of periodogram analysis of hydroacoustic signals reflected from them with the application of voting algorithm. The identification of an object in the article means making a decision to distinguish it from other objects. Hydroacoustic signals are the main means of obtaining information about the underwater environment, they are also widely used to detect and identify underwater objects, including ships, submarines and underwater structures. The identification of underwater objects is an important

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Sulis, S., D. Mary, and L. Bigot. "3D magneto-hydrodynamical simulations of stellar convective noise for improved exoplanet detection." Astronomy & Astrophysics 635 (March 2020): A146. http://dx.doi.org/10.1051/0004-6361/201937105.

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Context. Convective motions at the stellar surface generate a stochastic colored noise source in the radial velocity (RV) data. This noise impedes the detection of small exoplanets. Moreover, the unknown statistics (amplitude, distribution) related to this noise make it difficult to estimate the false alarm probability (FAP) for exoplanet detection tests. Aims. In this paper, we investigate the possibility of using 3D magneto-hydrodynamical (MHD) simulations of stellar convection to design detection methods that can provide both a reliable estimate of the FAP and a high detection power. Method

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15

Baycroft, Thomas A., Harry Badnell, Samuel Blacker, and Amaury H. M. J. Triaud. "GJ 9404 b: A Confirmed Eccentric Planet, and not a Candidate." Research Notes of the AAS 7, no. 8 (2023): 175. http://dx.doi.org/10.3847/2515-5172/acefc5.

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Abstract Eccentric orbits can be decomposed into a series of sine curves which affects how the false alarm probability is computed when using traditional periodograms on radial-velocity data. Here we show that a candidate exoplanet orbiting the M dwarf GJ 9404, identified by the HADES survey using data from the HARPS-N spectrograph, is in fact a bona fide planet on a highly eccentric orbit. Far from a candidate, GJ 9404b is detected with a high confidence. We reach our conclusion using two methods that assume Keplerian functions rather than sines to compute a detection probability, a Bayes Fac

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Cabot, Samuel H. C., and Gregory Laughlin. "Stacked Periodograms as a Probe of Exoplanetary Populations." Astronomical Journal 163, no. 5 (2022): 206. http://dx.doi.org/10.3847/1538-3881/ac54b5.

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Abstract Ongoing, extreme-precision Doppler radial-velocity (RV) surveys seek planets with masses less than several M ⊕; population-level studies to determine the distribution of planetary masses, however, remain difficult due to the required observational time investment, as well as challenges associated with robustly detecting the lowest-mass planets. We outline a novel approach that leverages extensive, existing RV data sets to constrain masses of exoplanet populations: stacking periodograms of RV time series across many targets. We show that an exoplanet population may be statistically ide

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Qin, Han, and Luyu Li. "A Modified Gaussian Model for Spectral Amplitude Variability of the SMART 1 Array Records." Applied Sciences 12, no. 23 (2022): 12067. http://dx.doi.org/10.3390/app122312067.

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Artificial ground motions, particularly conditional simulated artificial ground motions, are an essential complement to actual earthquake records when designing large-span structures, while considering the spatially varying properties of ground motions. Most existing methods, both conditional and unconditional forms, consider only the simulated ground motion complying with the power spectral densities and the coherence between the spectra of actual ground motions. In this study, the SMART 1 array’s records are regarded as conditional simulated ground motions from its central station. Their per

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Duarte, Victor Braga Rodrigues, Francisca de Cássia Silva da Silva, Igor Viana Souza, et al. "Previsão de vazão na bacia hidrográfica do rio Manuel Alves da Natividade utilizando o modelo de séries temporais SARIMA." Journal of Biotechnology and Biodiversity 7, no. 4 (2019): 457–68. http://dx.doi.org/10.20873/jbb.uft.cemaf.v7n4.duarte.

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O estudo e simulação do escoamento superficial de uma bacia hidrográfica são fundamentais para o gerenciamento dos recursos hídricos. Os modelos hidrológicos são ferramentas que auxiliam o planejamento do abastecimento hídrico, projetos de uso da água, geração de energia hidrelétrica, sistemas de irrigação, utilização sustentável e conservação da biodiversidade de uma bacia hidrográfica. A área em estudo é a bacia hidrográfica do rio Manuel Alves da Natividade, uma importante bacia hidrográfica pertencente a região hidrográfica Tocantins-Araguaia, um dos principais afluentes do rio Tocantins.

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Nugraheni, Melly, Ahmad Zakaria, Endro Prasetyo Wahono, Dyah Indriana Kusumastuti, and Ahmad Herison. "Rainfall Patterns in Indonesian Provinces During El-Nino and La-Nina: FFT and Lomb Periodogram Analysis." MEDIA KOMUNIKASI TEKNIK SIPIL 30, no. 2 (2024): 157–65. https://doi.org/10.14710/mkts.v30i2.65646.

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Indonesia is a country affected by the El Nino and La Nina climate anomalies. The provinces of Aceh, Central Kalimantan, and Maluku are three regions representing parts of Indonesia that have a variety of rainfall distribution and climatic conditions. This research was conducted to determine the influence of the El Nino and La Nina climate anomalies on these three regions by looking at the areas that have a dominant influence due to these climate anomalies. The research used BMKG Indonesia rainfall data with a total of 16 rainfall stations and a data range of 22 years. The methods used for mod

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Polanco-Martínez, Josué M. "Búsqueda de señal orbital en isótopos estables de carbono y oxígeno de belemnites del Jurásico Inferior de la cuenca Vasco-Cantábrica mediante el periodograma suavizado de Lomb-Scargle." Estudios Geológicos 77, no. 1 (2021): e140. http://dx.doi.org/10.3989/egeol.44231.595.

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Los isótopos estables obtenidos de muestras fosilizadas de macrofósiles, como los belemnites, son unos de los pocos registros geológicos existentes del Jurásico Inferior, por lo cual han sido usados para reconstrucciones de temperaturas y salinidades del océano de esa época. Sin embargo, hasta la fecha no han sido utilizados para averiguar si estos paleoindicadores pudieron registrar algún tipo de evento periódico relacionado con los ciclos orbitales de la Tierra. Por esta razón y teniendo en cuenta varias de las limitaciones al utilizar estos tipos de datos, en este trabajo se presenta un nov

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Eshmuratova, Gulchekhra, and Davron Eshmuratov. "Research of the temporal distribution of the atmospheric aridity index and its spectrum of fluctuations on the territory of Uzbekistan." E3S Web of Conferences 590 (2024): 05004. http://dx.doi.org/10.1051/e3sconf/202459005004.

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The issue of spatio-temporal distribution of the atmospheric aridity index SPI on the territory of Uzbekistan by month of the year is considered based on precipitation data from 1966 to 2015 at meteorological stations of the regional centers of the Republic. The adequacy of the SPI index in diagnosing dry (wet) years and its informativeness in analyzing precipitation regimes is shown. Oscillation spectra (periodograms) of the SPI index were obtained for 13 weather stations in Uzbekistan. The main periods of oscillations of 0.5, 1, 2.5, 5 and 10-12 years were identified, caused by fluctuations

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Krawczyk, Andrzej, and Marek Krąpiec. "The Permutation Test for Testing the Statistical Significance of the Power Spectrum Estimation in Dendrochronological Analysis." Geochronometria 36, no. -1 (2010): 23–29. http://dx.doi.org/10.2478/v10003-010-0022-4.

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The Permutation Test for Testing the Statistical Significance of the Power Spectrum Estimation in Dendrochronological AnalysisThe study presents a proposal of application of the statistical permutation test, known from other applications, for searching for the symptoms of cyclicity, in particular related to solar activity, in the annual growth sequences of trees. The test consists in generation of random sequences of the increment widths observed and comparison of their periodograms with the periodogram of the sequence analysed. This allows for evaluation of the significance of the individual

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Süveges, Maria, Richard I. Anderson, and Laurent Eyer. "How stable are our standard candles? Time-resolved analysis of amplitude and period changes in OGLE-III LMC Cepheids." Proceedings of the International Astronomical Union 11, A29B (2015): 505–8. http://dx.doi.org/10.1017/s1743921316005998.

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AbstractWe revisit a group of OGLE-III Cepheids that exhibit nearby double peaks in their periodograms using a technique of statistics called kernel modelling. We investigate the phenomenology of these Cepheids (termed twin-peak Cepheids in this paper) in more detail by comparing a sample of 29 LMC Cepheids that exhibit twin frequency peaks with 24 other Cepheids that do not. Using the kernel technique, we investigate light curve variability as a function of time, revealing both frequency and amplitude modulations. We present the preliminary results of our study in progress, which suggests a c

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Baehring, Th, A. Keller, and I. Raue. "Die Periodogramm-Analyse zur Signal- und Rauschbewertung im Röntgenfernsehsignal - Periodogram Analysis for Signal and Noise Evaluation in Fluoroscopic Video Signals." Biomedizinische Technik/Biomedical Engineering 40, no. 11 (1995): 310–15. http://dx.doi.org/10.1515/bmte.1995.40.11.310.

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Luengas C., Lely A., and Daissy C. Toloza. "Análisis frecuencial y de la densidad espectral de potencia de la estabilidad de sujetos amputados." TecnoLógicas 23, no. 48 (2020): 1–16. http://dx.doi.org/10.22430/22565337.1453.

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La amputación transtibial provoca una disminución de la información somatosensorial disponible para el sistema nervioso central, esta pérdida muscular y fisiológica que involucra la articulación del tobillo reduce la fuerza muscular de las piernas, lo que afecta la capacidad de equilibrio y la movilidad de quien la sufre, al presentarse bajo uso de las extremidades inferiores, se provoca una hipotrofia de los músculos y el déficit en su fuerza incrementa. Adicionalmente, los sujetos con amputación transtibial deben adaptarse a la falta de la articulación fisiológica del tobillo y los músculos

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Li, Ta-Hsin. "Quantile Periodograms." Journal of the American Statistical Association 107, no. 498 (2012): 765–76. http://dx.doi.org/10.1080/01621459.2012.682815.

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Engelberg, Shlomo. "Periodograms and the Method of Averaged Periodograms [Lecture Notes]." IEEE Signal Processing Magazine 40, no. 6 (2023): 83–91. http://dx.doi.org/10.1109/msp.2023.3285044.

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Krzesinski, J., H. T. Şener, S. Zola, and M. Siwak. "A search for hot subdwarf binaries in data from the Transiting Exoplanet Survey Satellite." Monthly Notices of the Royal Astronomical Society 516, no. 1 (2022): 1509–23. http://dx.doi.org/10.1093/mnras/stac2088.

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ABSTRACT We present the results of a search for binary hot subdwarf stars in photometric data from the Transiting Exoplanet Survey Satellite (TESS). The sample of objects used in this work was a byproduct of another search for pulsating hot subdwarfs, which resulted in the discovery of nearly 400 non-pulsating variable candidates. The periodogram for each object was calculated and a frequency signal with one or more harmonics above the 4 σ detection threshold was used to consider the candidate as a possible binary system. The type of variability was subsequently confirmed by visual inspection.

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Púčik, Jozef, Oldřich Ondráček, and Elena Cocherová. "Observability of Spectral Components beyond Nyquist Limit in Nonuniformly Sampled Signals." ISRN Signal Processing 2012 (June 28, 2012): 1–10. http://dx.doi.org/10.5402/2012/643563.

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Identification of a signal component with the frequency exceeding the Nyquist limit is a challenging problem in signal theory as well as in some specific applications areas like astronomy and biosciences. A consequence of the well-known sampling theorem for a uniformly sampled signal is that the spectral component above the Nyquist limit is aliased into lower frequency range, making a distinction between true and aliased components impossible. The nonuniform sampling, however, offers a possibility to reduce aliased components and uncover information above the Nyquist limit. In this paper, we p

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Recuero, Laura, Lilian Maila, Víctor Cicuéndez, et al. "Mapping Cropland Intensification in Ecuador through Spectral Analysis of MODIS NDVI Time Series." Agronomy 13, no. 9 (2023): 2329. http://dx.doi.org/10.3390/agronomy13092329.

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Multiple cropping systems constitute an essential agricultural practice that will ensure food security within the increasing demand of basic cereals as a consequence of global population growth and climate change effects. In this regard, there is a need to develop new methodologies to adequately monitor cropland intensification. The main objective of this research was to assess cropland intensification by means of spectral analysis of MODIS NDVI time series in a high cloudiness tropical area such as Ecuador. A surface of 89,225 ha of the main staple crops in this country, which are rice and ma

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Velasco, Carlos. "NON-GAUSSIAN LOG-PERIODOGRAM REGRESSION." Econometric Theory 16, no. 1 (2000): 44–79. http://dx.doi.org/10.1017/s0266466600161031.

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We show the consistency of the log-periodogram regression estimate of the long memory parameter for long range dependent linear, not necessarily Gaussian, time series when we make a pooling of periodogram ordinates. Then, we study the asymptotic behavior of the tapered periodogram of long range dependent time series for frequencies near the origin, and we obtain the asymptotic distribution of the log-periodogram estimate for possibly non-Gaussian observation when the tapered periodogram is used. For these results we rely on higher order asymptotic properties of a vector of periodogram ordinate

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Hassler, Uwe. "THE PERIODOGRAM REGRESSION." Journal of Time Series Analysis 14, no. 5 (1993): 549. http://dx.doi.org/10.1111/j.1467-9892.1993.tb00164.x.

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Katkovnik, V. "Robust M-periodogram." IEEE Transactions on Signal Processing 46, no. 11 (1998): 3104–9. http://dx.doi.org/10.1109/78.726825.

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Stoica, Petre, and Tomas Sundin. "Optimally smoothed periodogram." Signal Processing 78, no. 3 (1999): 253–64. http://dx.doi.org/10.1016/s0165-1684(99)00066-3.

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Hübner, Moritz, Daniela Huppenkothen, Paul D. Lasky, Andrew R. Inglis, Christopher Ick, and David W. Hogg. "Searching for Quasi-periodic Oscillations in Astrophysical Transients Using Gaussian Processes." Astrophysical Journal 936, no. 1 (2022): 17. http://dx.doi.org/10.3847/1538-4357/ac7959.

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Abstract Analyses of quasi-periodic oscillations (QPOs) are important to understanding the dynamic behavior in many astrophysical objects during transient events like gamma-ray bursts, solar flares, magnetar flares, and fast radio bursts. Astrophysicists often search for QPOs with frequency-domain methods such as (Lomb–Scargle) periodograms, which generally assume power-law models plus some excess around the QPO frequency. Time-series data can alternatively be investigated directly in the time domain using Gaussian process (GP) regression. While GP regression is computationally expensive in th

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AL-MANIE, M. A., and W. J. WANG. "TIME-FREQUENCY ANALYSIS BY EVOLUTIONARY PERIODOGRAM WITH APPLICATION IN GEAR FAULT DIAGNOSIS." International Journal of Wavelets, Multiresolution and Information Processing 08, no. 05 (2010): 679–93. http://dx.doi.org/10.1142/s0219691310003742.

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The evolutionary periodogram has been introduced to mechanical fault diagnosis and relationship between the evolutionary periodogram and time-frequency spectrogram has been investigated. The evolutionary periodogram is unveiled as an especially windowed spectrogram, and is applied to gearbox fault diagnosis. It has been shown that the window used in the evolutionary periodogram is not a single function but a combination of a set of functions. Two cases of gearbox diagnosis are presented as examples of application. Vibration signals and a synchronous signal are collected for the analysis. The t

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Nabeya, Seiji, and Katsuto Tanaka. "Aproximate Distributions of the Periodogram and Related Statistics under Normality." Econometric Theory 2, no. 1 (1986): 33–65. http://dx.doi.org/10.1017/s0266466600011361.

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Under normality, we obtain higher-order approximations to the distributions of the periodogram and related statistics. Our approach is based on the theorem which decomposes the periodogram into the sum of two independent random variables. It is seen that this decomposition enables us to study fairly closely the higher-order properties of not only the periodogram, but also periodogram-based statistics such as the estimators of the spectrum and prediction error variance. Some of the approximation results are graphically presented together with the exact results based on simulations.

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Albentosa-Ruiz, Ezequiel, and Nicola Marchili. "High-pass Filter Periodogram: An Improved Power Spectral Density Estimator for Unevenly Sampled Data." Publications of the Astronomical Society of the Pacific 136, no. 11 (2024): 114502. http://dx.doi.org/10.1088/1538-3873/ad8781.

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Abstract Accurate time series analysis is essential for studying variable astronomical sources, where detecting periodicities and characterizing power spectral density (PSD) are crucial. The Lomb–Scargle periodogram, commonly used in astronomy for analyzing unevenly sampled time series data, often suffers from noise introduced by irregular sampling. This paper presents a new high-pass filter (HPF) periodogram, a novel implementation designed to mitigate this sampling-induced noise. By applying a frequency-dependent HPF before computing the periodogram, the HPF method enhances the precision of

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Giovannelli, J. F., and J. Idier. "Bayesian interpretation of periodograms." IEEE Transactions on Signal Processing 49, no. 7 (2001): 1388–96. http://dx.doi.org/10.1109/78.928692.

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Hoffman, John, Jake VanderPlas, Joel Hartman, and Gáspár Bakos. "A fast template periodogram." EPJ Web of Conferences 152 (2017): 03002. http://dx.doi.org/10.1051/epjconf/201715203002.

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McSweeney, Laura A. "Comparison of periodogram tests." Journal of Statistical Computation and Simulation 76, no. 4 (2006): 357–69. http://dx.doi.org/10.1080/10629360500107618.

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SHIMOTSU, KATSUMI, and PETER C. B. PHILLIPS. "Pooled Log Periodogram Regression." Journal of Time Series Analysis 23, no. 1 (2002): 57–93. http://dx.doi.org/10.1111/1467-9892.00575.

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Süveges, Maria, Leanne Guy, and Shay Zucker. "Significance of periodogram peaks." Proceedings of the International Astronomical Union 11, A29A (2015): 219. http://dx.doi.org/10.1017/s174392131600288x.

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AbstractThree versions of significance measures or False Alarm Probabilities (FAPs) for periodogram peaks are presented and compared for sinusoidal and box-like signals, with specific application on large-scale surveys in mind.

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Bhattacharyya, B. B., G. D. Richardson, and P. V. Flores. "Unit roots: Periodogram ordinate." Statistics & Probability Letters 76, no. 6 (2006): 641–51. http://dx.doi.org/10.1016/j.spl.2005.09.011.

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Nam, Gilnam, Sinsup Cho, and In-Kwon Yeo. "Bootstrapping Log Periodogram Regression." Communications for Statistical Applications and Methods 10, no. 3 (2003): 1047–56. http://dx.doi.org/10.5351/ckss.2003.10.3.1047.

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Mohan, P., A. Mangalam, and S. Chattopadhyay. "Parametric Models of Periodogram." Journal of Astrophysics and Astronomy 35, no. 3 (2014): 397–400. http://dx.doi.org/10.1007/s12036-014-9240-x.

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Paparoditis, Efstathios. "Bootstrapping periodogram and cross periodogram statistics of vector autoregressive moving average models." Statistics & Probability Letters 31, no. 3 (1997): 243. http://dx.doi.org/10.1016/s0167-7152(96)00201-5.

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Paparoditis, Efstathios. "Bootstrapping periodogram and cross periodogram statistics of vector autoregressive moving average models." Statistics & Probability Letters 27, no. 4 (1996): 385–91. http://dx.doi.org/10.1016/0167-7152(95)00047-x.

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Hartantio, Fajar, Ahmad Zakaria, and Dyah Kusumastuti. "The effect of El Nino and La nina on the rain data of Lampung Barat Regency, Lampung Province." Jurnal Rekayasa Sipil dan Desain 9, no. 3 (2021): 513–22. https://doi.org/10.23960/jrsdd.v9i3.1926.

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The purpose of this research to analyze and determine dominant impact area due to the effect of El Nino and La Nina on 6 rainfall station in west Lampung Regency, Lampung Province. This study also compred between Fast Fourier Transform (FFT) methods, and Lomb Periodogram methods. This study using rainfall data from 1998 to 2019 taken from Balai Besar Wilayah Sungai Mesuji – Sekampung (BBWSMS). According on comparison result, it is known that both methods indicate that Air Hitam Rainfall Station experience the effect of El Nino and La Nina more dominantly than the others, with the looping perio

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Choi, Jae-Woong, and Eui-Rim Jeong. "CNN based Distance and Velocity Estimation for OFDM Radar Systems." Webology 19, no. 1 (2022): 4692–705. http://dx.doi.org/10.14704/web/v19i1/web19313.

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The objective of this paper is to propose a new target distance and velocity estimation technique for OFDM radar systems. First, the 2D periodogram is collected from the reflected signal via FFT of received OFDM symbols. The largest value of a 2D periodogram often represents the target so that its position indicates the distance and velocity. The CFAR is one of the famous conventional techniques to find the peak in the 2D periodogram. In this paper, a CNN based estimator is proposed. The proposed CNN directly finds the distance and velocity from the 2D periodogram. The proposed method requires

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