In this paper we consider a single-item inventory systemwith lost sales and fixed order cost. We numerically illustrate the lack of a clear structure in optimal replenishment policies for such systems. However, policies with a simple structure are preferred in practical settings. Examples of replenishment policies with a simple parametric description are the (s, S) policy and the (s,nQ) policy....

the main goal of this article, this review is that due to the decline of the united states america's soft power after the invasion of iraq in march 2003 - due to the power of unilateral hardware-based - iran can and should according to the religious, historical, and cultural commonalities with its neighboring, strengthen software sources of power than the new iraq to create a strategic and...

Abstract:This study aims at measuring the relationship between students‟ attitude toward govern-ment‟s virtual social network policy making with social security feeling, in another word, to which extent social security feeling emphasizing on social networks is determined via users‟ attitude toward government‟s media policy making? Analytical-descriptive method including survey is used in ...

We present a new algorithm, incremental least squares policy iteration (ILSPI), for finding the infinite-horizon policy for partially observable Markov decision processes (POMDPs). The ILSPI algorithm computes a basis representation of the value function by minimizing the Bellman residual and it performs policy improvement in reachable belief states. A number of optimal basis functions are dete...

this study attempts to explore the development and evolution of mackinder's geopolitical thinking in global politics of british empire and its influence thereafter. this research paper examines the characteristics of geopolitical perspective of britain, through halford mackinder's heartland theory during the three periods of the early twentieth century to the present time. in this reg...

economic development plans normally contain some policy objectives, especially for the most important macroeconomic variables. governments are expected to take best policies to achieve these objectives, although due to some structural or other impediments they may fail to touch the objectives. we have attempted to uncover the determinants of private consumption and investment as the objectives ...

Vendor managed inventory (VMI) is a supply-chain initiative in which the vendor is authorized to manage inventories of agreed upon stock-keeping-units at retail locations. In this paper, a modified joint inventory policy is introduced for VMI systems where the vendor takes a standard (s, S) policy and the retailers utilize can-order policies. Under the regime of a can-order policy, each retaile...