batch sizing in different planning period is categorized as a classical problem in production planning, that so many exact & heuristic methods have been proposed to solve this problem, each of which considering various aspects of the original problem. the solution obtained from majority – e.g. mrp – is in this format that there may be some periods of idleness or each period should produ...

introduction: to study the effects of exercise, how important it is to choose a posture? we aimed to characterize the possible impact of different body positions on cardiovascular parameters during and after sustained isometric handgrip (ihg) exercise. materials and methods: cross sectional study was carried out in 33 young adult males (mean age: 19.21±1.083 years). we recorded blood pressure (...

Software product lines provide a common architecture, reusable code, and other common assets for a set of related software products. Variation is a central requirement in this context, as the product line components have to be instantiated, composed, and configured in the context of the products. In many approaches either static composition techniques or dynamic composition techniques based on ...

This study is concerned with how the quality of perishable products can be improved by shortening the time interval between production and distribution. As special types of food such as dairy products decay fast, the integration of production and distribution scheduling (IPDS) is investigated. An integrated scheduling of both processes improves the performance and costs because the separated sc...

applying robust optimization to solve product mix problem in automotive industries in this article, applying robust optimization in product mix problem in automotive industries is presented. the problem includes determining both the quantity and the identification of each product to produce to maximize profit. at first, the deterministic model will be presented. then, robust model of product mi...

in the new production systems, finding a way to improving the product and system reliability in design is a very important. the reliability of the products and systems may improve using different methods. one of this methods is redundancy allocation problem. in this problem by adding redundant component to sub-systems under some constraints, the reliability improved. in this paper we worked on ...

backgrownd: studies in regions with seasonal climatic variations have revealed a correlation between human natural conception and birth rates. holidays and other cultural activities probably have influence on conception, but the ambient temperature and emotional influences on the female hormones related to fertility may play an important part in the seasonal variation in conception. objectives:...