We propose an hour-ahead prediction model for electricity prices that captures the heavy-tailed behavior that we observe in the hourly spot market in the Ercot (Texas) and the PJM West hub grids. We present a model according to which we separate the price process into a thin-tailed trailing-median process and a heavytailed residual process whose probability distribution can be approximated by a...

OBJECTIVE: Diabetes mellitus is one of the most common endocrine diseases with micro-vascular complications and is a common cause of polyneuropathy. We studied the effect of enalapril on electrophysiologic criteria and clinical symptoms of patients with type II diabetes and sensory neuropathy. MATERIALS AND METHODS: A double blind study was conducted on 45 Patients with type II diabetes and ne...

Hub facilities are centralized locations that consolidate and distribute the commodities in transportation networks. In many real world applications, transport service providers may prefer to lease hub for a time horizon rather than being owned or constructed. this paper, modeling framework is proposed multi-period location problem arises design of star–star network with two types hubs links. I...

This paper studies the robust optimization for the single allocation p-hub median problem under discount factor uncertainty. We develop the discount factor as a novel uncertain parameter, which represents different connection modes between hubs. The discount factor can be described by a random variable with discrete distribution in nominal case. We apply a robust optimization approach to deal w...

abstract one of the basic assumptions in hub covering problems is considering the covering radius as an exogenous parameter which cannot be controlled by the decision maker. practically and in many real world cases with a negligible increase in costs, to increase the covering radii, it is possible to save the costs of establishing additional hub nodes. change in problem parameters during the pl...

Background: Possible solutions to overcome the many challenges of home delivery are collection and points (CDPs). In addition commercial facilities, role CDPs can also be played by users’ households, providing a crowd storage service. Key decisions regarding relate their location, as well allocation users selected locations, so that distance from is minimal. Methods: this paper, described probl...