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순환신경망을 활용한 제조 공정 과정상의 오류 검출 방법 사례 연구
조아진,남혜림,조준,황종운,이용오 대한산업공학회 2018 대한산업공학회 추계학술대회논문집 Vol.2018 No.11
In this paper, we propose an error detection method on manufacturing process using Recurrent Neural Network (RNN) in order to overcome the limitation on time-based maintenance method still used in a majority of factories. Using RNN, errors in manufacturing process can be detected by manners of a preventive maintenance with a reliable accuracy.
조아진,최명진,이영기,한채훈,구자룡,윤종우,노정우 대한내과학회 2019 The Korean Journal of Internal Medicine Vol.34 No.6
Background/Aims: Maintaining the patency of vascular access (VA) in hemodialysis (HD) patients is important and can be life-saving. We investigated the effects of aspirin resistance and mean platelet volume (MPV) on VA failure in HD patients. Methods: We enrolled 163 patients on maintenance HD. VA failure was defined as thrombosis or a decrease of > 50% of the normal vessel diameter, as revealed by angiography. Results: Aspirin resistance was observed in 17 of 109 patients in whom this parameter was measured, and was not significantly associated with VA failure (p = 0.051). The mean MPV was 9.15 ± 0.05 fL. The 163 patients were grouped by the median MPV value (9.08 fL) at baseline; patients with higher MPVs (n = 82) had lower platelet counts (p = 0.002) and albumin levels (p = 0.009). During 34 months of follow-up, 65 VA failures (39.9%) occurred. The Kaplan-Meier curve revealed significant differences between the two groups in terms of cumulative VA failure (54.1% vs. 35.3%, p = 0.018). On multivariate analysis, the MPV (hazard ratio [HR], 1.794; 95% confidence interval [CI], 1.066 to 3.020; p = 0.028), platelet count (HR, 1.003; 95% CI, 1.001 to 1.006; p = 0.01), and smoking status (HR, 1.894; 95% CI, 1.019 to 3.519; p = 0.043) independently predicted VA failure. Conclusions: A high MPV was associated with an increased risk of VA failure, whereas aspirin resistance showed only a weak association. The MPV may predict VA survival in HD patients.