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Comparative study of acoustic signals of rolling eggs on inclined plate and impulse response in eggshell crack detection CIGR Journal
Lashgari, Majid; Mohammadigol, Reza.
The potential of acoustic signals of rolling eggs on an inclined plate and impulse response for nondestructive detection of eggshell crack was investigated. Discrimination of hairline cracked and star cracked eggs from intact ones were carried out using artificial neural network. Ten features were used based on one-way ANOVA F-test statistics. According to the result, holdout detection accuracy of inclined plate and impulse response methods were 92.3% and 94.6%, respectively. The results indicated that these two methods were potentially useful for discrimination of eggs according to detection of different eggshell cracks.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eggshell crack; Inclined plate; Impulse response; Neural network; Classification.
Ano: 2018 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4140
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Psychoacoustic evaluation of a garden tractor noise CIGR Journal
Lashgari, Majid; Maleki, Ali.
In addition to achieving sustainable development of agricultural mechanization, it has causing problems on occupational health and safety for people working in different fields of agriculture. Noise is considered as one of the most debilitating conditions in farming and a comprehensive investigation of this relationship is required. In this study, some factors affecting the noise generated by a Goldoni garden tractor were evaluated. Research factors were including engine speed, gear ratios and type of operation. Accordingly, factorial experiments in completely randomized design with three replicates were performed. According to variance analysis with LAeq, PA and UBA, operation type, gear ratio and engine speed were found to be significant (P< 0.01)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Garden tractor; Psychoacoustic; Sound quality; Sound pressure level..
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3242
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