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Read e-book online High-Performance Computing and Networking: 7th International PDF

By Peter Sanders, Tuomo Takkula, Dag Wedelin (auth.), Peter Sloot, Marian Bubak, Alfons Hoekstra, Bob Hertzberger (eds.)

ISBN-10: 3540489339

ISBN-13: 9783540489337

ISBN-10: 3540658211

ISBN-13: 9783540658214

This e-book constitutes the refereed lawsuits of the seventh foreign convention on High-Performance Computing and Networking, HPCN Europe 1999, held in Amsterdam, The Netherlands in April 1999.
The one hundred fifteen revised complete papers awarded have been conscientiously chosen from a complete of as regards to two hundred convention submissions in addition to from submissions for numerous topical workshops. additionally integrated are forty chosen poster displays. The convention papers are geared up in 3 tracks: end-user functions of HPCN, computational technology, and laptop technology; also there are six sections similar to topical workshops.

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Read or Download High-Performance Computing and Networking: 7th International Conference, HPCN Europe 1999 Amsterdam, The Netherlands, April 12–14, 1999 Proceedings PDF

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Additional info for High-Performance Computing and Networking: 7th International Conference, HPCN Europe 1999 Amsterdam, The Netherlands, April 12–14, 1999 Proceedings

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18 to yield a good approximation of its chain segment. The quality of such an approximation is measured by comparing the total volume of these boxes to a lower bound. If we imagine a chain segment to be completely stretched and aligned with respect to a coordinate axis (say x-axis), then the volume of the corresponding bounding box may act as such a lower bound. Each P E starts out with one bounding box for its entire segment and increases the number of bounding boxes until the total volume is within a quality factor q with respect to the lower bound.

Each P E starts out with one bounding box for its entire segment and increases the number of bounding boxes until the total volume is within a quality factor q with respect to the lower bound. Our experiments have shown that rather crude approximations suffice, q about 4-6. This leads to just a handful of bounding boxes per P E and cuts down the amount of data by as much as 90 % without giving up too much information about the overall chain structure. Because of using axis-parallel boxes, the computational overhead is also very modest as the box boundaries can be determined by simple comparisons of atom coordinates.

I . . . . _> "6 ~- +++ ' + 4-+ # ++~- ++ 10 + , , A ..... I 10 . . . . I 100 n/m 1000 Fig. 1. Double-logarithmic plot of ratio between total number of variables and active set size (averaged over a run). The problem suite used mainly consists of problems from Lufthansa and Swedish Railways. = 10 are artificial problems which are much denser than typical crew scheduling problems [19]. How exactly the parallel active set can be used in practice depends on the character of the problem.

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High-Performance Computing and Networking: 7th International Conference, HPCN Europe 1999 Amsterdam, The Netherlands, April 12–14, 1999 Proceedings by Peter Sanders, Tuomo Takkula, Dag Wedelin (auth.), Peter Sloot, Marian Bubak, Alfons Hoekstra, Bob Hertzberger (eds.)


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