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Obsolescence optimization of electronic and mechatronic components by considering dependability and energy consumption

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Journal of Central South University 2013年第5期20卷 1221-1225页

作者： M.A.Mellal S.Adjerid D.Benazzouz S.Berrazouane E.J.Williams Solid Mechanics and System Laboratory Faculty of Engineering Sciences (FSI)M'Hamed Bougara University Faculty of Engineering Sciences (FSI) M'Hamed Bougara University Decision Sciences College of BusinessUniversity of Michigan Industrial and Manufacturing Systems Engineering Department College of Engineering and Computer ScienceUniversity of Michigan

Nowadays, rapid technological progress influences the dependability of equipments and also causes rapid obsolescence. The mechatronic and electronic equipment components are mostly affected by obsolescence. A new challenger unit possesses identical functionalities, but with higher performances. This work aims to find the optimal number of components which should be replaced by new-type units, under budgetary constraints. In this work, the new challenger unit is characterized by lower energy consumption and the optimization steps are based on genetic algorithm (GA). The result shows the importance of this type of replacement in order to economize energy consumption and to deal with obsolescence.

关键词： obsolescence lower energy consumption mechatronic and electronic components genetic algorithm

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Effects of diluted methanol and water as foaming agents on the performance of latex foamed warm asphalt mixtures

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Journal of Traffic and Transportation Engineering(English Edition) 2023年第3期10卷 413-426页

作者： Mohd Rosli Mohd Hasan Tai Guo Hainian Wang Sharvin Poovaneshvaran Ashiru Sani Muhammad Khuzaimi Aziz Seyed Reza Omranian School of Civil Engineering Universiti Sains Malaysia(Engineering Campus)Nibong Tebal 14300Pulau PinangMalaysia School of Highway Chang'an UniversityXi'an 710064China Department of Civil Engineering Kano University of Science and TechnologyKano 3244Nigeria Faculty of Applied Engineering EMIB Research GroupUniversity of AntwerpAntwerp 2020Belgium

Latex as an asphalt modifier has gained popularity in the asphalt industry as it improves the durability of asphalt ***,the elastomeric properties of latex stiffen the asphalt binders,resulting in additional energy consumption during the production of asphalt mixtures,which may cause a higher emission of greenhouse *** is undesirable for sustainable development and the *** this study,the applicability of diluted methanol and water was comparatively evaluated as foaming agents in the production of warm mix asphalt(WMA)mixtures incorporating *** methanol was used because it has a lower boiling point and latent heat than water,allowing the asphalt mixture to be produced at a lower temperature and thus consuming less *** performance of the foamed asphalt mixture was investigated through service characteristics,mechanical performance,and moisture susceptibility of *** service characteristics,on the other hand,were measured in a laboratory while preparing and compacting the asphalt mixture,which refers to the amount of energy required during the production and construction stages in the asphalt plant and on the construction site,*** degree of energy required was assessed based on the workability index,coatability index,and the compaction energy *** mechanical performance of asphalt mixtures was characterized by indirect tensile strength,resilient modulus,and dynamic creep *** resistance to moisture damage was evaluated based on the common parameter,indirect tensile strength *** findings revealed that the use of diluted methanol foaming agent helped improve the workability of latex modified asphalt *** foamed latex-modified WMA demonstrated better performance compared to asphalt mixtures prepared using water as the foaming agent.

关键词： Asphalt mixtures Foaming technology Natural resources Low emission Elastomer lower energy consumption

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