Results 61 to 70 of about 119,173 (294)

Gate‐Align‐SED: Semi‐Supervised Sound Event Detection via Adaptive Feature Gating and Cross‐Task Alignment in Situation Awareness

Advanced Intelligent Systems, EarlyView.
Overview of the proposed Gate‐Align‐SED, including two stages of training: (1) Mean‐Teacher SSL Training; and (2) Enhancer Model Training. In complex real‐world environments such as disaster monitoring, effective sound event detection (SED) is often hindered by the presence of noise and limited labeled data.
Jieli Chen, Li‐Minn Ang, Chee Shen Lim, Kah Phooi Seng, Jeremy Smith   +4 more
wiley   +1 more source

Anomalous frequency characteristics of groundwater level before major earthquakes in Taiwan [PDF]

Hydrology and Earth System Sciences, 2013
Unusual decreases of water levels were consistently observed in 78% (= 42/54) of wells in the Choshuichi Alluvial Fan of central Taiwan about 250 days before the Chi-Chi earthquake (M = 7.6 on 20 September 1999) while possible factors of barometric ...
C.-H. Chen, C.-H. Wang, S. Wen, T.-K. Yeh, C.-H. Lin, J.-Y. Liu, H.-Y. Yen, C. Lin, R.-J. Rau, T.-W. Lin   +9 more
doaj   +1 more source

Is It Possible to Predict Strong Earthquakes?

, 2014
The possibility of earthquake prediction is one of the key open questions in modern geophysics. We propose an approach based on the analysis of common short-term candidate precursors (2 weeks to 3 months prior to strong earthquake) with the subsequent ...
Polyakov, Yuriy S., Ryabinin, Gennadiy V., Solovyeva, Anna B., Timashev, Serge F.   +3 more
core   +1 more source

Numerical treatment of seismic accelerograms and of inelastic seismic structural responses using harmonic wavelets [PDF]

, 2007
The harmonic wavelet transform is employed to analyze various kinds of nonstationary signals common in aseismic design. The effectiveness of the harmonic wavelets for capturing the temporal evolution of the frequency content of strong ground motions is ...
Burrus C. S., Cohen L., Mallat S., Newland D. E., Newland D. E., Newland D. E., Newland D. E.   +6 more
core   +1 more source

Shapley Additive Explanation for Local Class Differentiation: Local Explainability for Class Differentiation in Classification Models

Advanced Intelligent Systems, EarlyView.
An instance‐level, model‐agnostic explanation of class differentiation is introduced through SHAP‐LCD, linking probability shifts to feature‐wise Shapley contributions. The method operates on tabular and image data and is released in a fully reproducible implementation, offering a transparent way to examine, at each instance, why predictive models ...
Roxana M. Romero Luna, Hugo A. Ordoñez Erazo, Carlos A. Cobos Lozada   +2 more
wiley   +1 more source

Seismic Damage Analysis of Concrete Gravity Dam Based on Wavelet Transform

Shock and Vibration, 2016
The key to the dam damage assessment is analyzing the remaining seismic carrying capacity after an earthquake occurs. In this paper, taking Koyna concrete gravity dam as the object of study, the dynamic response and damage distribution of the dam are ...
Dunben Sun, Qingwen Ren
doaj   +1 more source

Fluid-injection-induced earthquakes characterized by hybrid-frequency waveforms manifest the transition from aseismic to seismic slip

Nature Communications, 2021
Yu et al. report a new type of induced earthquake signal characterized by hybrid-frequency waveforms (EHW). The low-frequency source features of the EHWs suggest they may represent slow ruptures transitioning from aseismic to seismic slip.
Hongyu Yu, Rebecca M. Harrington, Honn Kao, Yajing Liu, Bei Wang   +4 more
doaj   +1 more source

Earthquake Size Distribution: Power-Law with Exponent Beta = 1/2? [PDF]

, 2010
We propose that the widely observed and universal Gutenberg-Richter relation is a mathematical consequence of the critical branching nature of earthquake process in a brittle fracture environment.
Antsyferov, Beroza, Bird, Bird, Boettcher, Boettcher, Clauset, Csikor, Dahmen, Dimiduk, Dziewonski, Dziewonski, Ekström, Ekström, Enescu, Feller, Frohlich, Frohlich, Geist, Gutenberg, Harris, Hiramatsu, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kanamori, Miguel, Molchan, Okal, Otter, Park, Perez-Campos, Rhoades, Rhoades, Rhoades, Richeton, Schorlemmer, Schwartz, Shelly, Tinti, Vere-Jones, Vere-Jones, Vere-Jones, Weiss, Werner, Yan Y. Kagan, Zaiser, Zaiser, Zaiser, Zhuang, Zhuang   +62 more
core   +1 more source

How cold is too cold? A theoretical analysis of the optimal trigger for index insurance for frost damage to crops

American Journal of Agricultural Economics, EarlyView.
Abstract Crop insurance is undoubtedly an extremely valuable element in protecting agricultural businesses, but in many cases standard indemnity‐based products have had very low uptake due to high transaction costs elevating premiums to unaffordable levels.
Amogh Prakasha Kumar, Laura Meriluoto, Richard Watt   +2 more
wiley   +1 more source

Widespread Very Low Frequency Earthquakes (VLFEs) Activity Offshore Cascadia

Geophysical Research Letters, 2022
AbstractA significant amount of stress in the Cascadia subduction zone (CSZ) is released by different forms of slow earthquakes including tremors, low‐frequency earthquakes, and very low‐frequency earthquakes (VLFEs)—all occurring onshore at the deeper part of the transition zone. Their activity offshore, however, remains elusive.
Kuntal Chaudhuri, Abhijit Ghosh
openaire   +1 more source