Browsing by Author "Lin, S. C."

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Simulations of subsonic vortex-shedding flow past a 2D vertical plate in the near-continuum regime by the parallelized DSMC code
(2012-08-01)
Tseng, K. C.
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Kuo, T. C.
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Lin, S. C.
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Su, C. C.
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Wu, J. S.
A general-purpose Parallel Direct Simulation Monte Carlo Code, named PDSC, is used to simulate near-continuum subsonic flow past a 2D vertical plate for studying the vortex-shedding phenomena. An unsteady time-averaging sampling method and a post-processing procedure called DREAM (DSMC Rapid Ensemble Averaging Method) have also been implemented, reducing the overall computational expense and improving the sampling quality of time-dependent flow problems in the rarefied flow regime. Parametric studies, including the temporal variable time step (TVTS) factor, the number of particles per cell, the domain size, and the Reynolds number, have been conducted, obtaining the Strouhal number and various aerodynamic coefficients of the flow. Results are compared to experimental data in the continuum regime available in the literature, demonstrating the capacity of PDSC and DREAM to simulate near-continuum vortex-shedding problems within acceptable computational time. (C) 2012 Elsevier B.V. All rights reserved.
Using Case-Based Reasoning Method to Design a Return Merchandise Authorization System for Supply Chain Management in Internet of Thing
(2017-01-01)
Chen, Yeh-cheng
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Chu, C. N.
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Sun, Hung Min
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Chen, Ruey-Shun
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Tu, Mengru
This paper drives into the deficiencies of the traditional RMA service system of a notebook computer manufacturer and analyzes the customer service behavior of its customer relationship management. It uses a global web-based framework and Java for development tool for the establishment of system. Data compilation procedure, with the help of the pro system case-based deduction technique, provided the system with an automatic analytical capacity, thereby further enhancing the capacity of the web-based intelligent RMA repair and maintenance system. The system allowed an interaction with the customers. The intelligent RMA system allowed us to improve repair and maintenance efficiency by 26% strongly boosting degree of customer satisfaction. Moreover, the global inventory management can reduce 12%; a boon that not only reduced the interest payments for inventory, but also eased up the company revolving fund cycle. The system can institute a more flexible part supply system, as well as enabled the Quality Assurance (QA) and R&D departments to understand the trouble-causing factors of the products that the company has sold. As a result, product AFR (Annual Failure Rate) dropped by around 85% Finally, we also used the repair and maintenance information to train new engineers. It saved us training time. Hence, the research has designed an innovative and practical IT (CRM) system.