Results 1  10
of
418,508
Approximation bounds for Black Hole Search problems?
"... Abstract. A black hole is a highly harmful stationary process residing in a node of a network and destroying all mobile agents visiting the node without leaving any trace. The Black Hole Search is the task of locating all black holes in a network, through the exploration of its nodes by a set of mob ..."
Abstract
 Add to MetaCart
of mobile agents. In this paper we consider the problem of designing the fastest Black Hole Search, given the map of the network, the starting node and a subset of nodes of the network initially known to be safe. We study the version of this problem that assumes that there is at most one black hole
Nearoptimal sensor placements in gaussian processes
 In ICML
, 2005
"... When monitoring spatial phenomena, which can often be modeled as Gaussian processes (GPs), choosing sensor locations is a fundamental task. There are several common strategies to address this task, for example, geometry or disk models, placing sensors at the points of highest entropy (variance) in t ..."
Abstract

Cited by 342 (34 self)
 Add to MetaCart
information is NPcomplete. To address this issue, we describe a polynomialtime approximation that is within (1 − 1/e) of the optimum by exploiting the submodularity of mutual information. We also show how submodularity can be used to obtain online bounds, and design branch and bound search procedures. We
Locally Adaptive Dimensionality Reduction for Indexing Large Time Series Databases
 In proceedings of ACM SIGMOD Conference on Management of Data
, 2002
"... Similarity search in large time series databases has attracted much research interest recently. It is a difficult problem because of the typically high dimensionality of the data.. The most promising solutions' involve performing dimensionality reduction on the data, then indexing the reduced d ..."
Abstract

Cited by 316 (33 self)
 Add to MetaCart
distance approximation, and a nonlower bounding, but very tight Euclidean distance approximation and show how they can support fast exact searchin& and even faster approximate searching on the same index structure. We theoretically and empirically compare APCA to all the other techniques
Hardness and approximation results for black hole search in arbitrary graphs
 In Proc. 12th Coll. on Structural Information and Communication complexity (SIROCCO’05
, 2005
"... Abstract. A black hole is a highly harmful stationary process residing in a node of a network and destroying all mobile agents visiting the node, without leaving any trace. We consider the task of locating a black hole in a (partially) synchronous arbitrary network, assuming an upper bound on the ti ..."
Abstract

Cited by 28 (11 self)
 Add to MetaCart
on the time of any edge traversal by an agent. For a given graph and a given starting node we are interested in finding the fastest possible Black Hole Search by two agents (the minimum number of agents capable to identify a black hole). We prove that this problem is NPhard in arbitrary graphs, thus solving
Searching for black holes in subways.
 Theory of Computing Systems,
, 2012
"... Abstract Current mobile agent algorithms for mapping faults in computer networks assume that the network is static. However, for large classes of highly dynamic networks (e.g., wireless mobile ad hoc networks, sensor networks, vehicular networks), the topology changes as a function of time. These n ..."
Abstract

Cited by 4 (4 self)
 Add to MetaCart
team of asynchronous computational entities (the mapping agents) determining the location of black holes in a highly dynamic graph, whose edges are defined by the asynchronous movements of mobile entities (the subway carriers). We determine necessary conditions for the problem to be solvable. We
Searching for a black hole in tree networks
"... A black hole is a highly harmful stationary process residing in a node of a network and destroying all mobile agents visiting the node, without leaving any trace. We consider the task of locating a black hole in a (partially) synchronous tree network, assuming an upper bound on the time of any edge ..."
Abstract

Cited by 13 (5 self)
 Add to MetaCart
edge traversal by an agent. The minimum number of agents capable to identify a black hole is two. For a given tree and given starting node we are interested in the fastest possible black hole search by two agents. For arbitrary trees we give a 5/3approximation algorithm for this problem. We give
Searching for a black hole in arbitrary networks
 Distributed Computing
, 2002
"... Consider a networked environment, supporting mobile agents, where there is a black hole: a harmful host that disposes of visiting agents upon their arrival, leaving no observable trace of such a destruction. The black hole search problem is the one of assembling a team of asynchronous mobile agents, ..."
Abstract

Cited by 45 (25 self)
 Add to MetaCart
Consider a networked environment, supporting mobile agents, where there is a black hole: a harmful host that disposes of visiting agents upon their arrival, leaving no observable trace of such a destruction. The black hole search problem is the one of assembling a team of asynchronous mobile agents
Search in the patience game ’black hole
, 2005
"... We propose card games for one player as a valuable domain for studying search problems. They are a natural AI problem, as they are a widely enjoyed recreation for which solving techniques are generally not studied. We focus on a particular patience, called Black Hole. We show that a general version ..."
Abstract

Cited by 3 (1 self)
 Add to MetaCart
We propose card games for one player as a valuable domain for studying search problems. They are a natural AI problem, as they are a widely enjoyed recreation for which solving techniques are generally not studied. We focus on a particular patience, called Black Hole. We show that a general version
Results 1  10
of
418,508