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Estimation of varying frequency by Gabor filters and Neural Network
Okano, Yasuhiro,Hamada, Nozomu 대한전자공학회 1996 APCCAS:Asia Pacific Conference on Circuits And Sys Vol.1 No.1
A method of varying frequency estimation using Gabor filter bank and neural network is proposed. This method consists of two phases. First phase is the feature extraction step which decomposes a given input signal into each frequency components using Gabor filter bank. Then, such components are treated as features in the frequency domain. Second phase is the estimation step which calculates instantaneous frequency from the first phase outputs using neural network. Neural network has the ability to estimate instantaneous frequency not only against artificial signal, but also against added noise signal. The aim of the proposed method is to estimate the varying frequency of non-stationary 1-D and 2-D (real) signal, where local frequency is assumed to vary smoothly.
A Study on Thermal Comfort when Wearing Air Ventilation Clothing at Construction Sites
( Ayano Dempoya ),( Kouhei Kuwabara ),( Yasuhiro Hamada ),( Keita Yamazaki ) 한국감성과학회 2021 한국감성과학회 국제학술대회(ICES) Vol.2021 No.-
In an effort to prevent heat stroke at construction sites, this study sought to evaluate the actual conditions of workers while wearing a full body harness (FH), and examine the effects of wearing FH on the thermal characteristics of ventilated work wear (VWW) using a thermal manikin. Results suggest that workers feel the reduced airflow associated with wearing a FH with VWW, causing them to work in a hot and unpleasant environment. Wearing FH under VWW resulted in the highest degree of clothing insulation and the lowest airflow velocity among four different clothing conditions. There is a need to consider measures to enhance the cooling effect and improve comfort for workers required to wear a FH with VWW.
A Study on Thermal Comfort when Wearing Air Ventilation Clothing at Construction Sites
( Ayano Dempoya ),( Kouhei Kuwabara ),( Yasuhiro Hamada ),( Keita Yamazaki ) 한국감성과학회 2021 추계학술대회 Vol.2021 No.0
In an effort to prevent heat stroke at construction sites, this study sought to evaluate the actual conditions of workers while wearing a full body harness (FH), and examine the effects of wearing FH on the thermal characteristics of ventilated work wear (VWW) using a thermal manikin. Results suggest that workers feel the reduced airflow associated with wearing a FH with VWW, causing them to work in a hot and unpleasant environment. Wearing FH under VWW resulted in the highest degree of clothing insulation and the lowest airflow velocity among four different clothing conditions. There is a need to consider measures to enhance the cooling effect and improve comfort for workers required to wear a FH with VWW.