Recently the concept of facility efficiency, which defined by data envelopment analysis (DEA), introduced as a location modeling objective, that provides facilities location’s effect on their performance in serving demands. By combining the DEA models with the location problem, two types of “efficiencies” are optimized: spatial efficiency which measured by finding the least cost location and al...

We study a novel location optimization problem, the Collective-k Optimal Location Selection (CkOLS) problem. This problem finds k regions such that setting up k service sites, one in each region, collectively attracts the maximum number of customers by proximity. The problem generalizes the traditional influence maximizing location selection problem from searching for one optimal region to k re...

compared to conventional chlorination methods which apply chlorine at water treatment plant, booster chlorination has almost solved the problems of high dosages of chlorine residuals near water sources and lack of chlorine residuals in the remote points of a water distribution system (wds). however, control of trihalomethane (thm) formation as a potentially carcinogenic disinfection by-product ...

The problem of optimally locating web servers across the Internet is considered. Assuming that the user demand forecast is known, the objective is to minimize cost, subject to satisfying performance requirements of customers (that access the web servers) in terms of throughput and latency thresholds. To solve the optimization problem, three heuristics are considered: greedy heuristic, DEJAVU al...

Genetic networks help in identifying interactions between genes, and provide information about the function role of individual genes in the cellular system. In this thesis, we have employed a Bayesian framework to learn network structures from microarray data, and implemented an algorithm that uses dynamic programming to find the optimal gene network model for a small number of genes. To test i...

A company frequently decides on location and design for new facilities in a sequential way. However, for a fixed number of new facilities (in this study we restrict ourselves to the case of two new facilities), the company might improve its profit by taking its decisions for all the facilities simultaneously. In this paper a profit maximization problem is considered, where the market share capt...

Shlomi Dolev, Yuval Elovici, Rami Puzis, Polina Zilberman Abstract In many applications we are required to increase the deployment of a distributed monitoring system on an evolving network. In this paper we present a new method for finding candidate locations for additional deployment in the network. This method is based on the Group Betweenness Centrality (GBC) measure that is used to estimate...

Network location models comprise one of the main categories of location models. These models have various applications in regional and urban planning as well as in transportation, distribution, and energy management. In a network location problem, nodes represent demand points and candidate locations to locate the facilities. If the links network is unchangeably determined, the problem will be ...

Many problems arising in the area of telecommunication ask for solutions with a tree-star topology. This paper proposes a general procedure for finding optimal solutions to a family of these problems. The family includes problems in the literature named as connected facility location, rent-or-buy and generalized Steiner tree-star. We propose a solution framework based on a branch-and-cut algori...