The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, we study the purchasing strategy problem when the suppliers' reliability is uncertain. This problem is derived from the real world situation in the power metering device industry. Besides the price and product category each supplier can provide, the purchasing strategy is also influenced by other intangible impacts, i.e. wild fluctuations of suppliers' reliability and lead time can...
Stochastic optimization facilitates decision making in uncertain environments. In typical problems, probability distributions are fit to historical data for the chance variables and then optimization is carried out, as if the estimated probability distributions are the “truth”. However, this perspective is optimistic in nature and can frequently lead to sub-optimal or infeasible results because the...
Nested simulation algorithms are used in several scientific investigations such as climate, statistical mechanics, and financial and actuarial risk management. Recently, these methods have also been used in the context of Bayesian computations and are referred to as Nested Sampling. In several of these problems, the inner level computation typically involves simulating events with very small probability,...
We propose to use a global metamodeling technique known as stochastic kriging to improve the efficiency of Discrete Optimization-via-Simulation (DOvS) algorithms. Stochastic kriging metamodel allows the DOvS algorithm to utilize all information collected during the optimization process and identify solutions that are most likely to lead to significant improvement in solution quality. We call the approach...
A propagation model was recently developed to characterize the waves between two communicating volumes in the presence of multipath stochastic media [1]. A double-angular power spectrum (DAPS) is a crucial part of this model. It relates the directional propagation of waves on the transmitting side to that on the receiving side. To obtain the DAPS of a system, one may conduct direct measurement or...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.