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Full-Text Articles in Mechanical Engineering
A Stochastic Production Cost Model For Remanufacturing Systems, Gaurang S. Patel
A Stochastic Production Cost Model For Remanufacturing Systems, Gaurang S. Patel
Theses and Dissertations - UTB/UTPA
Growing environmental concern throughout this decade coupled with enforced legislation, customer expectations and economic incentives have forced increasing number of manufacturers to take back their products from end user. Managing this reverse flow of products is called reverse logistics. The stochastic nature of returned products complicates the production planning for remanufacturing systems in reverse logistics. In this thesis a stochastic production cost model, considering various costs associated under different situations for remanufacturing systems of returned products is developed. A search algorithm method is recommended to determine optimal production run size, production rate and space for remanufacturing systems in reverse logistics. …
Extension Of Stereolithography Mold Life Using Gas-Assisted Injection Molding, Dilip Bose Ramalingam Nagarajan
Extension Of Stereolithography Mold Life Using Gas-Assisted Injection Molding, Dilip Bose Ramalingam Nagarajan
Theses and Dissertations - UTB/UTPA
Stereolithography (SL) molds show great promise for injection molding of limited number of parts, greatly reducing the time to product and production cost. However, they present challenges to designers because of their strength, thermal characteristics and shorter lifetimes compared to metal molds. Gas-assisted injection molding (GAIM) has been used to alleviate the problems of distortion and thermal damage. The use of GAIM makes it possible to produce a large number of parts compared to conventional injection molding in epoxy molds with higher quality. In this research solid models of the mold with different part geometry were created using CAD and …
The Use Of Confidence Intervals For The Control Limits Of X¯ And S Control Charts, Daniel A. Lopez
The Use Of Confidence Intervals For The Control Limits Of X¯ And S Control Charts, Daniel A. Lopez
Theses and Dissertations - UTB/UTPA
This research focuses on the variation observed on the control limits of X¯ and S control charts, due to the sampling schemes. In previous studies it has been shown that the estimated control limits derived by a small number of subgroups does not help in setting up reliable control limits. It has also been shown that estimating control limits from a large number of subgroups is not a feasible option. In this research quantile tables will be derived by sampling from the standard normal distribution and used to explain the effects of sampling on the control limits. The tables will …