[EN] In this paper, the study of frequency-dependent ultrasonic attenuation in strongly heterogeneous cementitious materials is addressed. To accurately determine the attenuation over a wide frequency range, it is necessary ...
Miralles Ricós, Ramón; Lara Martínez, Guillermo-Fernán; Carrión García, Alicia; Esteban, Jose Antonio(Science and Engineering Publishing Company, 2013-05)
[EN] In this work, an algorithm has been proposed for real time detection and classification of beluga whale calls. The detection algorithm is based on an adaptive activity detector that exploits a priori knowledge of the ...
Miralles Ricós, Ramón; Carrión García, Alicia; Looney, D.; Lara Martínez, Guillermo-Fernán; D. Mandic(Acoustical Society of America, 2015-09)
Extracting frequency-derived parameters allows for the identification and characterization of acoustic events, such as those obtained in passive acoustic monitoring applications. Situations where it is difficult to achieve ...
[Otros] Lamb waves have emerged as a valuable tool to examine long plate-like structures in a faster way compared to conventional bulk wave techniques, which make them attractive in non-destructive testing. However, they ...
Hemakom, Apit; Chanwimalueang, Theerasak; Carrión García, Alicia; Aufegger, Lisa; Constantinides, Anthony G.; Mandic, Danilo P.(Institute of Electrical and Electronics Engineers (IEEE), 2016-09)
Financial markets typically undergo periods of prosperity followed by periods of stagnation, and this undulation makes it challenging to maintain market efficiency. The efficient market hypothesis (EMH) states that there ...
[EN] High amplitude non-linear acoustic methods have shown great potential for the identification of micro-damage in inhomogeneous materials such as concrete. Usually, these methods evaluate non-linearity parameters related ...
[EN] In this paper, we present a novel and completely different approach to the problem of scattering material characterization: measuring the degree of predictability of the time series. Measuring predictability can provide ...
Carrión García, Alicia(Universitat Politècnica de València, 2015-01-21)
Este trabajo presenta un nuevo enfoque en el problema de la caracterización de materiales dispersivos: la medida del grado de determinismo en señales de inspección ultrasónica. La medida del nivel de determinismo puede dar ...
Pitarch Bono, Damián(Universitat Politècnica de València, 2020-12-22)
[ES] El objetivo de este trabajo consistirá, realizar un estudio de la evolución de diferentes parámetros tanto ambientales (humedad, temperatura, presión atmosférica) como ultrasónicos (velocidad, atenuación¿) durante ...
[EN] An exhaustive study on thermal damage of Portland cement-based materials is addressed. Damage carried out at different temperatures on concrete between 40 and 525 degrees C were assessed by means of microstructural, ...
In this paper the study of frequency-dependent ultrasonic attenuation in strongly heterogeneous materials is addressed. To determine the attenuation accurately over a wide frequency range, it is necessary to have suitable ...
Miralles Ricós, Ramón; Lara Martínez, Guillermo-Fernán; Carrión García, Alicia; Esteban , José Antonio(Instituto de Telecomunicaciones y Aplicaciones Multimedia (iTEAM), 2013)
[EN] This paper reports the work carried out by iTEAM researchers in Passive Acoustic Monitoring (PAM) for underwater monitoring of cetaceans. It includes a description of novel signal processing algorithms for detection ...
Carrión García, Alicia(Universitat Politècnica de València, 2018-07-30)
La caracterización de la modalidad de la señal es un nuevo concepto objeto de recientes trabajos de investigación cuyo principal propósito es identificar cambios en la naturaleza de señales reales. Con el término naturaleza ...
[EN] An exhaustive monitoring of an internal sulphate attack of Portland cement-based materials is addressed. Four series of Portland cement mortars with different amounts of gypsum (0%¿2% SO3 respect to the cement
by mass) ...
[EN] In this study, complete ultrasonic monitoring of Glass-fiber Reinforced Cement plates under bending tests was addressed. In this kind of experiment, the mechanical properties of the specimen continuously change during ...
[EN] In this paper, a new approach for characterizing material damage, using ultrasonic waves, is proposed. Two
concrete series with two types of cement with different C3A content and similar mechanical properties ...