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Euclidean Traveling Salesman Tours through Stochastic Neighborhoods
"... Abstract. We consider the problem of planning a shortest tour through a collection of neighborhoods in the plane, where each neighborhood is a disk whose radius is an i.i.d. random variable drawn from a known probability distribution. This is a stochastic version of the classic traveling salesman p ..."
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Cited by 2 (0 self)
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Abstract. We consider the problem of planning a shortest tour through a collection of neighborhoods in the plane, where each neighborhood is a disk whose radius is an i.i.d. random variable drawn from a known probability distribution. This is a stochastic version of the classic traveling salesman
The Collaborative Carrier Vehicle Routing Problem for Capacitated Traveling Salesman Tours
"... Abstract: This paper concentrates on a new framework for a postmarket reassignment of requests in a Collaborative Carrier Network (CCN). While the framework was applied to a pickup and delivery scenario in [BB07] we now use it for the vehicle routing of a carrier network offering LTL pickup servi ..."
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services leading to a set of interdependent capacitated traveling salesman tours. 1
On the complexity of approximating Euclidean traveling salesman tours and minimum spanning trees
, 1997
"... We consider the problems of computing rapproximate traveling salesman tours and rapproximate minimum spanning trees for a set of n points in IR d , where d 1 is a constant. In the algebraic computation tree model, the complexities of both these problems are shown to be \Theta(n log n=r), for al ..."
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Cited by 6 (1 self)
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We consider the problems of computing rapproximate traveling salesman tours and rapproximate minimum spanning trees for a set of n points in IR d , where d 1 is a constant. In the algebraic computation tree model, the complexities of both these problems are shown to be \Theta(n log n
Solving the Inspection Problem via Colored Traveling Salesman Tours
"... Abstract — This paper describes an effective approach to solve the inspection problem via colored traveling salesman tours. Given an environment with obstacles and regions to be inspected, the approach plans a collisionfree and dynamicallyfeasible motion trajectory that enables the vehicle to insp ..."
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Abstract — This paper describes an effective approach to solve the inspection problem via colored traveling salesman tours. Given an environment with obstacles and regions to be inspected, the approach plans a collisionfree and dynamicallyfeasible motion trajectory that enables the vehicle
Approximation Algorithms for Planar Traveling Salesman Tours and MinimumLength Triangulations
, 1991
"... This paper gives a partitioning scheme for the geometric, planar traveling salesman problem, under the Euclidean metric: given a set S of n points in the plane, find a shortest closed tour (path) visiting all the points. The scheme employs randomization, and gives a tour that can be expected to be s ..."
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Cited by 8 (0 self)
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This paper gives a partitioning scheme for the geometric, planar traveling salesman problem, under the Euclidean metric: given a set S of n points in the plane, find a shortest closed tour (path) visiting all the points. The scheme employs randomization, and gives a tour that can be expected
A 5/3Approximation Algorithm for the Clustered Traveling Salesman Tour and Path Problems
, 1998
"... We consider the Ordered Cluster Traveling Salesman Problem (OCTSP). In this problem, a vehicle starting and ending at a given depot must visit a set of n points. The points are partitioned into K, K n, prespeci ed clusters. The vehicle must rst visit the points in cluster 1, then the points in clust ..."
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We consider the Ordered Cluster Traveling Salesman Problem (OCTSP). In this problem, a vehicle starting and ending at a given depot must visit a set of n points. The points are partitioned into K, K n, prespeci ed clusters. The vehicle must rst visit the points in cluster 1, then the points
Power assignment problems in wireless communication: Covering points by disks, reaching few receivers quickly, and energyefficient travelling salesman tours
 In Proc. 4th Int. IEEE Conf. Distributed Comput. Sensor Systems, LNCS 5067
, 2008
"... Abstract. A fundamental class of problems in wireless communication is concerned with the assignment of suitable transmission powers to wireless devices/stations such that the resulting communication graph satisfies certain desired properties and the overall energy consumed is minimized. Many concre ..."
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Cited by 4 (0 self)
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Abstract. A fundamental class of problems in wireless communication is concerned with the assignment of suitable transmission powers to wireless devices/stations such that the resulting communication graph satisfies certain desired properties and the overall energy consumed is minimized. Many concrete communication tasks in a wireless network like broadcast, multicast, pointtopoint routing, creation of a communication backbone, etc. can be regarded as such a power assignment problem. This paper considers several problems of that kind; the first problem was studied before in [1,6] and aims to select and assign powers to k out of a total of n wireless network stations such that all stations are within reach of at least one of the selected stations. We show that the problem can be (1+) approximated by only looking at a small subset of the input, which is of size O k
Ant colonies for the travelling salesman problem
, 1997
"... We describe an artificial ant colony capable of solving the travelling salesman problem (TSP). Ants of the artificial colony are able to generate successively shorter feasible tours by using information accumulated in the form of a pheromone trail deposited on the edges of the TSP graph. Computer si ..."
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Cited by 276 (5 self)
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We describe an artificial ant colony capable of solving the travelling salesman problem (TSP). Ants of the artificial colony are able to generate successively shorter feasible tours by using information accumulated in the form of a pheromone trail deposited on the edges of the TSP graph. Computer
Where the REALLY Hard Problems Are
 IN J. MYLOPOULOS AND R. REITER (EDS.), PROCEEDINGS OF 12TH INTERNATIONAL JOINT CONFERENCE ON AI (IJCAI91),VOLUME 1
, 1991
"... It is well known that for many NPcomplete problems, such as KSat, etc., typical cases are easy to solve; so that computationally hard cases must be rare (assuming P != NP). This paper shows that NPcomplete problems can be summarized by at least one "order parameter", and that the hard p ..."
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Cited by 681 (1 self)
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It is well known that for many NPcomplete problems, such as KSat, etc., typical cases are easy to solve; so that computationally hard cases must be rare (assuming P != NP). This paper shows that NPcomplete problems can be summarized by at least one "order parameter", and that the hard problems occur at a critical value of such a parameter. This critical value separates two regions of characteristically different properties. For example, for Kcolorability, the critical value separates overconstrained from underconstrained random graphs, and it marks the value at which the probability of a solution changes abruptly from near 0 to near 1. It is the high density of wellseparated almost solutions (local minima) at this boundary that cause search algorithms to "thrash". This boundary is a type of phase transition and we show that it is preserved under mappings between problems. We show that for some P problems either there is no phase transition or it occurs for bounded N (and so bound...
TreadMarks: Distributed Shared Memory on Standard Workstations and Operating Systems
 IN PROCEEDINGS OF THE 1994 WINTER USENIX CONFERENCE
, 1994
"... TreadMarks is a distributed shared memory (DSM) system for standard Unix systems such as SunOS and Ultrix. This paper presents a performance evaluation of TreadMarks running on Ultrix using DECstation5000/240's that are connected by a 100Mbps switchbased ATM LAN and a 10Mbps Ethernet. Ou ..."
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Cited by 527 (17 self)
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TreadMarks is a distributed shared memory (DSM) system for standard Unix systems such as SunOS and Ultrix. This paper presents a performance evaluation of TreadMarks running on Ultrix using DECstation5000/240's that are connected by a 100Mbps switchbased ATM LAN and a 10Mbps Ethernet. Our objective is to determine the efficiency of a userlevel DSM implementation on commercially available workstations and operating systems. We achieved good speedups on the 8processor ATM network for Jacobi (7.4), TSP (7.2), Quicksort (6.3), and ILINK (5.7). For a slightly modified version of Water from the SPLASH benchmark suite, we achieved only moderate speedups (4.0) due to the high communication and synchronization rate. Speedups decline on the 10Mbps Ethernet (5.5 for Jacobi, 6.5 for TSP, 4.2 for Quicksort, 5.1 for ILINK, and 2.1 for Water), reflecting the bandwidth limitations of the Ethernet. These results support the contention that, with suitable networking technology, DSM is a...
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