voltage profile and losses are important factors in a distribution network in which there arevariety of ways to improve them. in this paper, distributed generation (dg) is used as a solutionto improve the above characteristics. backward/forward sweep load flow algorithm is used dueto the inefficiency of usual load flow algorithms because of high r/x ratio and their lack ofconvergence in distrib...

A new model for the design of the city gas distribution network has been presented. On the basis of mass flow rates and pressure balances a nonlinear system of equation is obtained. A method for solving the latter is outlined which gives accurate results. Also, this method, when compared to the other accessible ones, takes less computer time. Finally in this method the actual length of netw...

In this paper, a supply chain network design problem is explained which contains environmental concerns in arcs and nodes of network. It is assumed that there are some routes such as road, rail and etc. in each pair of nodes. In this model decision variables are choosing facilities to open, environmental investment level in each facility and flow of products between nodes in each route. A multi...

Botnets are recognized as one of the most dangerous threats to the Internet infrastructure. They are used for malicious activities such as launching distributed denial of service attacks, sending spam, and leaking personal information. Existing botnet detection methods produce a number of good ideas, but they are far from complete yet, since most of them cannot detect botnets in an early stage ...

Fracture orientation is a prominent factor in determining the reservoir fluid flow direction in a formation because fractures are the major paths through which fluid flow occurs. Hence, a true modeling of orientation leads to a reliable prediction of fluid flow. Traditionally, various distributions are used for orientation modeling in fracture networks. Although they offer a fairly suitable est...

In modern backbone networks with heterogeneous traffic, providing connectivity is taken for granted. The MPLS technology is a de-facto standard in modern backbone networks because of the applications it enables, in particular L2/L3 VPNs and traffic engineering. This paper deals with traffic engineering in MPLS backbone networks. We propose a method of gathering network performance parameters an...

Phase Unwrapping is a key step in deriving topographic information from Interferometric SAR. Several recent methods are based on a minimum cost network flow approach. In this paper we develop a new, computationally efficient, “divideand-conquer” strategy for phase unwrapping. INTRODUCTION The well-studied Interferometric Synthetic Aperture Radar (InSAR) problem for DEM generation involves the d...