نتایج جستجو برای: continuous location

تعداد نتایج: 480578  

Journal: :Wireless Personal Communications 2013
Liang Hong Gang Zhou Bo Liu Sang Hyuk Son

Query processing inmobileWireless Sensor Networks (WSNs) is still a challenging problem because sensor mobility causes frequent changes of network topology. In this paper, we study the problem of processing Continuous Location Dependent Query (CLDQ) that retrieves the sampling data of the sensors within a specific area (i.e. query area) around a mobile sensor. Existing query processing approach...

2007
Christoph F. Eick Rachana Parmar Wei Ding Tomasz F. Stepinski Jean-Philippe Nicot

This paper proposes a novel framework for mining regional colocation patterns with respect to sets of continuous variables in spatial datasets. The goal is to identify regions in which multiple continuous variables with values from the wings of their statistical distribution are co-located. A co-location mining framework is introduced that operates in the continuous domain without the need for ...

An important issue for suppliers, producers, and retailers who want to compete in a competitive environment is continuous performance improvement in a dynamic supply chain. Literature review on supply chain puts more emphasis on quantitative factors than other factors. In this research, we focus on quantitative factors which affect competitive advantages creation and investigation. Our goal is ...

2013
Hassan M. Rabie Ihab A. El-Khodary Assem A. Tharwat

The p-center location problem is concerned with determining the location of p centers in a plane/space to serve n demand points having fixed locations. The continuous absolute pcenter location problem attempts to locate facilities anywhere in a space/plane with Euclidean distance. The continuous Euclidean p-center location problem seeks to locate p facilities so that the maximum Euclidean dista...

Journal: :journal of sciences, islamic republic of iran 2013
a.a. arefijamaal r.a. kamyabi gol r. raisi tousi n. tavallaei

this paper deals with continuous frames and continuous riesz bases. we introduce continuous riesz bases and give some equivalent conditions for a continuous frame to be a continuous riesz basis. it is certainly possible for a continuous frame to have only one dual. such a continuous frame is called a riesz-type frame [13]. we show that a continuous frame is riesz-type if and only if it is a con...

Journal: :Computers & OR 2008
Justo Puerto Antonio M. Rodríguez-Chía

In this paper, we consider constrained multicriteria continuous location problems in two-dimensional spaces. In the literature, the continuous multicriteria location problem in two-dimensional spaces has received special attention in the last years, although only particular instances of convex functions have been considered. Our approach only requires the functions to be strictly quasiconvex an...

2006
Jack Brimberg Pierre Hansen Nenad Mladenović Said Salhi

In this survey, we examine an important class of facility location problems known as the multisource Weber problem (also referred to as the continuous location-allocation problem). We also show how recent advances in the use of metaheuristic rules have significantly improved the ability to solve problems of this type. The new solution methods are discussed for both the well known multisource W...

Journal: :Ophthalmology 2016
Vance M Thompson John P Berdahl Joel M Solano David F Chang

PURPOSE To compare the anterior lens capsulotomy edge tear strength created by manual continuous curvilinear capsulorhexis (CCC), femtosecond laser capsulotomy (FSLC), and a new automated precision pulse capsulotomy (PPC) device. DESIGN A 3-arm study in paired human cadaver eyes. PARTICIPANTS A total of 44 eye specimens from 22 donors in the United States. METHODS Capsulotomy was performe...

2004
Mohamed F. Mokbel Xiaopeng Xiong Moustafa A. Hammad Walid G. Aref

The tremendous increase in the use of cellular phones, GPS-like devices, and RFIDs results in highly dynamic environments where objects as well as queries are continuously moving. In this paper, we present a continuous query processor designed specifically for highly dynamic environments (e.g., location-aware environments). We implemented the proposed continuous query processor inside the PLACE...

2011
Reza Shokri George Theodorakopoulos George Danezis Jean-Pierre Hubaux Jean-Yves Le Boudec

Mobile users expose their location to potentially untrusted entities by using location-based services. Based on the frequency of location exposure in these applications, we divide them into two main types: Continuous and Sporadic. These two location exposure types lead to different threats. For example, in the continuous case, the adversary can track users over time and space, whereas in the sp...

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