The problem of locating distribution centers (DCs) is one of the most important issues in design of supply chain. In previous researches on this problem, each DC could supply products for all of the customers. But in many real word problems, DCs can only supply products for customers who are in a certain distance from the facility, coverage radius. Thus, in this paper a multi-objective intege...

in many practical distribution networks, managers face significant uncertainties in demand, local price of building facilities, transportation cost, and macro and microeconomic parameters. this paper addresses design of distribution networks in a supply chain system which optimizes the performance of distribution networks subject to required service level. this service level, which is considere...

We consider the coverage and connectivity problem of a sensor network with n unreliable nodes, uniformity arranged over a square region of unit area. We propose a novel triangle-arranged circle division method to obtain the the formula of the relationship of probability of coverage and connectivity, sensing radius, transmission radius, failure probability and the numbers of the nodes using prob...

In this paper, we pinpoint a new sensor selfdeployment problem, achieving focused coverage around a Point of Interest (POI), and introduce an evaluation metric, coverage radius, that reflects the significance of distance from the POI to uncovered areas. Then we propose two solution protocols, Greedy Advance (GA) and GreedyRotation-Greedy (GRG), which are to our best knowledge the first sensor s...

The aim of this paper is to minimize the overlapping coverage area in Wireless Sensor Networks with nodes having adjustable radius. We proposed Area-aware Coverage (A2C) that considers the sensing and transmission range of sensor nodes adjustable and uses six phases to detect and minimize overlapping coverage area. We also minimized the presence of redundant nodes and nodes with minimum coverag...

Monitoring the long-distance pipelines, rivers, roads and boundary lines with wireless sensor networks belongs to one-dimensional region monitoring. This paper primarily studies the coverage problems of the sensor networks in one-dimensional regions. Firstly, the onedimensional random coverage model is processed for the sensor nodes in one-dimensional monitoring region, and a formula is given t...

the purpose of this paper is to analyze the utility operating radius and service on city parks in ardabil neighborhood, local, regional and urban level, to investigate the relationship between the distribution of these parks with water levels in the city of ardabil, including shorabil lake and balyqlv river and reviews for distribution park. the data and information used by documentary. to anal...

Coverage and connectivity are two important problems in wireless sensor network. This paper focuses on the wireless sensor network communication radius in the high density of sensor nodes deployed randomly and two times smaller than the sensing radius; put forward a distributed k coverage multi connected node deployment algorithm based on grid. Simulation results show that the algorithm in this...

From the idea of using an array of isolated wireless ports called Infostations, we consider the use of existing cellular infrastructure as the location for these Infostations. The coverage area of Infostations, though, will be smaller than the cell area. We determine the worst-case SIR as a function of the coverage-radius-to-cell-radius ratio and the frequency-reuse cluster size. For specific m...