In this study, an EOQ (Economic Order Quantity) inventory mathematical model is constructed for a deteriorating item having time dependent demand when delay in payment is permissible. The deterioration rate is assumed to be a constant and the time varying demand rate is taken to be an exponential declining function of time. Mathematical models are also derived under two different circumstances,...

Severe environmental quality deterioration, along with predatory exploitation of energy resources, are generally associated with economic growth, especially in China. Against this background, the 6th Annual Conference of Energy Economics and Management provides a platform for examining outperforming governance factors and mechanisms of energy economics and policy. Thanks to Sustainability for p...

Recently, there has been a growing interest in reverse logistics due to environmental deterioration. Firms incorporate reverse flow to their systems for such reasons as ecological and economic factors, government regulations and social responsibilities. In this paper a new mixed integer mathematical model for a remanufacturing system, which includes both forward and reverse flows, is proposed a...

Numerous challenges confront adult hemophilia patients with inhibitors, including difficulty in controlling bleeding episodes, deterioration of joints, arthritic pain, physical disability, emotional turmoil, and social issues. High-intensity treatment regimens often used in the treatment of patients with inhibitors also impose significant scheduling, economic, and emotional demands on patients ...

Cross-country observations on the effects of population growth are used to show why differences in rates of growth in working-age population may be a key to understanding differences in economic performance across industrialized countries over the period 1975–1997 versus 1960–1974. In particular, we argue that countries with lower rates of adult population growth adopted new capital-intensive t...

While deterioration models consider the gradual reduction in quality and quantity of products over time, amelioration models assume the opposite. This paper is based on an earlier work by Hwang for finding an optimal economic order quantity solution for items subject to amelioration in a Weibull distribution. Hwang solved the problem with a graphical procedure. In this paper, a rigorous analyti...

Atrial fibrillation (AF), the most commonly encountered arrhythmia in clinical practice, is associated with significant morbidity and mortality. Of great significance are heart failure and stroke.1 With increased incidence and prevalence of AF, it represents a growing clinical and economic burden. AF is also a progressive disease secondary to continuous structural remodeling of the atria becaus...

This paper presents an economic manufacturing quantity model which determines an optimal production run length and inspection schedules simultaneously in a deteriorating production process. It is assumed that a production process is subject to a random deterioration from the in-control state to the out-of-control state and, thus, produces some proportion of defective items. An optimal productio...

The contradiction between economic development and environmental deterioration makes people begin to have a further understanding of the ecology and environment. To promote effective development of reverse logistics and implementation, according to general activity process of manufacturing enterprises, this paper builds the manufacturing system model of reverse logistics. On the basis of activi...

self-centering pier (scp) has been viewed as a remarkable accomplishment which is able to sustain major lateral loading with reduced structure damage in seismic engineering. stiffness deterioration observed in experiment is vital for the seismic performance of self-centering concrete pier. in this contribution, the associated stiffness deterioration with respect to the structural damage is mode...