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서정환(JungHwan Seo),차성운(Sung Woon Cha),현창훈(ChangHoon Hyun) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.4
Generally in the case of parts used for precision products, tolerance of parts is very small. So inaccuate size of molding parts generates serious problems. Therefore, it's necessary to secure data about shrinkage on each condition or study about manufacturing process which reduces shrinkage. To apply MCPs to manufature of plastic product, this paper verifies how the amount of gas and Talc can affect to cell-morphology, and examines the relation between shrinkage and cell-morphology by using ASTM specimen formed by MCPs process.
Gaeul Choi(최가을),Sungkuk Bae(배성국),Kwangmin Shim(심광민),Yeseop Park(박예섭),Junghwan Seo(서정환),Youkeun Oh(오유근) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Baseline drift in chromatography data often results in degraded quantitative analysis results. Baseline correction is required in order to achieve higher accuracy. It is difficult, however, to correct the baseline when its signal-to-noise ratio (SNR) is low or when the baseline drift occurs. This study proposes an algorithm to identify the correct baseline using the moving standard deviation and penalized least squares(PLS). The proposed method can be applied to noisy chromatographic data or even to any non-stationary data. This method calculates the moving standard deviation of data and identifies the points above the user-defined threshold. The initial weight vector of PLS for the corresponding points is initialized with the value of zero. The accurate baseline can be determined through the PLS method in an iterative manner. The performance of this method can be evaluated by comparing its root-mean-square error (RMSE) with other previous methods.