Results 21 to 30 of about 275,635 (230)

Recognition method of metal fracture images based on Wavelet kurtosis and Relevance vector machine

open access: yesMATEC Web of Conferences, 2016
The useful information extracted from fracture images is the most fundamental problem of quantitative analysis and intelligent diagnosis of metal fracture.
Sun Yi, Li Zhinong, Yan Jingwen
doaj   +1 more source

Perbandingan Nilai Ujian Nasional dan Ujian Sekolah Mata Pelajaran Matematika SMA Program IPA Tahun Pelajaran 2010/2011

open access: yesJurnal Pendidikan dan Kebudayaan, 2011
The purpose of this research is to compare the scores of National Exam and the scores from schools and also to identify the characteristics of Mathematics items for Senior High Schools at IPA programme.
Fahmi --
doaj   +1 more source

Applying kurtosis-adjusted equivalent continuous A-weighted sound pressure level to evaluate risk of occupational hearing loss associated with non-steady state noise

open access: yes环境与职业医学, 2022
BackgroundEquivalent continuous A-weighted sound pressure level is not appropriate for evaluating the risk of non-steady noise exposure, and need to be corrected by noise time-domain structure, but the correction method and its applicability need to be ...
Xiangjing GAO   +6 more
doaj   +1 more source

A Robust Method to Automatically Detect Fin Whale Acoustic Presence in Large and Diverse Passive Acoustic Datasets

open access: yesJournal of Marine Science and Engineering, 2022
The growing availability of long-term and large-scale passive acoustic recordings open the possibility of monitoring the vocal activity of elusive oceanic species, such as fin whales (Balaenoptera physalus), in order to acquire knowledge on their ...
Elena Schall, Clea Parcerisas
doaj   +1 more source

Hybrid ICA – regression: automatic identification and removal of ocular artifacts from electroencephalographic signals

open access: yesFrontiers in Human Neuroscience, 2016
Electroencephalography (EEG) is a portable brain-imaging technique with the advantage of high-temporal resolution that can be used to record electrical activity of the brain.
Malik Muhammad Naeem Mannan   +2 more
doaj   +1 more source

Higher Moments Actually Matter: Spillover Approach for Case of CESEE Stock Markets

open access: yesMathematics, 2022
The interconnectedness of stock markets is an important topic in empirical research, as spillovers on financial markets matter for asset pricing, portfolio allocation, financial stability, and risk management. This research focuses on all four moments of
Tihana Škrinjarić
doaj   +1 more source

Research on gear crack diagnosis of the planet gear transmission

open access: yesThe Journal of Engineering, 2019
Objected to the planetary gear transmission, research on the fault diagnosis of gear cracks is mainly carried out with method of EEMD decomposition and Envelope demodulation.
Chao Ma   +3 more
doaj   +1 more source

Modelling Shot Lengths of Hollywood Motion Pictures with the Dagum Distribution

open access: yesStatistica, 2020
This paper demonstrates the three-parameter Dagum distribution provides a good fit for shot lengths in Hollywood films due to its ability to model a wide range of skewness and kurtosis values and a variety of tail behaviours by virtue of its two shape ...
Nick Redfern
doaj   +1 more source

Classification of RCS sequences based on KL divergence

open access: yesThe Journal of Engineering, 2019
Radar cross section (RCS) is an important characteristic of radar targets. The mean, variance, skewness, kurtosis, varying patterns of RCS sequences provide rich features for radar target classification.
Qiang Cheng, Li Chen, Yaolin Zhang
doaj   +1 more source

On the Quantification of the GNSS Signals’ Quality for RFI Assessment

open access: yesEngineering Proceedings, 2023
The performance of radio-frequency interference (RFI) detection and localization could be improved if they are applied on good quality inputs. RFI assessment is an important aspect of evaluating overall signal quality.
Naveed Ahmed
doaj   +1 more source

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