Download A cascadic multigrid algorithm for variational inequalities by Blum H., Braess D., Suttmeier F.T. PDF

By Blum H., Braess D., Suttmeier F.T.

Whilst classical multigrid equipment are utilized to discretizations of variational inequalities, numerous problems are usually encountered mostly as a result loss of uncomplicated possible restrict operators. those problems vanish within the program of the cascadic model of the multigrid process which during this feel yields higher benefits than within the linear case. additionally, a cg-method is proposed as smoother and as solver on coarse meshes. The potency of the recent set of rules is elucidated by way of try out calculations for a drawback challenge and for a Signorini challenge.

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THE SPHINX-II BASELINE SYSTEM events of as little as a few hundred machine cycles with negligible overhead. All timing measurements are normalized to an Alpha processor running at 175MHz. It should also be emphasized that the main computational loops in the Sphinx-II system have been tuned carefully for optimum speed performance. The measurements reported in this work have been limited almost exclusively to such loops. Test Sets and Experimental Conditions The test sets used in the experiments have been taken from the various data sets involved in the 1993 and 1994 ARPA hub evaluations.

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4. 4 Related Work Some of the standard techniques in reducing the computational load of Viterbi search for large vocabulary continuous speech recognition have been the following: Narrowing the beamwidth for greater pruning. However, this is usually associated with an increase in error rate because of an increase in the number of search errors: the correct word sometimes get pruned from the search path in the bargain. Reducing the complexity of acoustic and language models. This approach works to some extent, especially if it is followed by more detailed search in later passes.

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