This paper employs mathematical modeling and algebraic approach to derive the optimal manufacturing batch size and number of shipment for a vendor-buyer integrated economic production quantity (EPQ) model with scrap. Unlike the conventional method by using differential calculus to determine replenishment lot size and optimal number of shipments for such an integrated system, this paper proposes...

There are two major theories about trade’s effect on the environment. The first, a win-lose scenario, posits that trade liberalization leads to economic growth, which, while increasing incomes, also results in an increasing scale of economic activity and, therefore, greater environmental degradation. This effect might also be compounded by a composition effect, in which countries specialize in ...

Bearing failure is one of the dominant causes of failure and breakdowns in rotating machinery, leading to huge economic loss. Aiming at the nonstationary and nonlinear characteristics of bearing vibration signals as well as the complexity of condition-indicating information distribution in the signals, a novel rolling element bearing fault diagnosis method based on multifractal theory and gray ...

dynamic economic load dispatch is one of the most important roles of power generation’s operation and control. it determines the optimal controls of production of generator units with predicted load demand over a certain period of time. economic dispatch at minimum production cost is one of the most important subjects in the power network’s operation, which is a complicated nonlinear constraine...

using size at first maturity (sfm) as a biological reference point, the minimum legal size (mls) for the black clam, villorita cyprinoides was fixed at 20 mm. corresponding minimum legal weight was calculated as 3.4 g. the reproductive load and mean generation time were determined as 0.35 and 0.72, respectively. of the total quantity of clams exploited during 1996-97, 50% were juveniles. the pe...

This paper presents a simple algebraic approach for deriving the optimal lot size for economic production quantity (EPQ) model with rework process. Conventional methods for solving lot size problems are by using differential calculus on the long-run average production-inventory cost function with the need to prove optimality first. A few recent articles proposed the algebraic approach to the so...

Humans have altered ecosystems more rapidly and extensively than ever, largely to meet rapidly growing demands for resources along with economic development. These demands have been considered important drivers of ecosystem degradation and biodiversity loss. Are humans becoming less dependent on ecosystem services and biodiversity following economic development? Here, we used roundwood producti...