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3 edition of Wavefront cache-friendly algorithm for compact numerical schemes found in the catalog.

Wavefront cache-friendly algorithm for compact numerical schemes

Wavefront cache-friendly algorithm for compact numerical schemes

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  • 32 Currently reading

Published by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service, distributor in Hampton, Va, [Springfield, Va .
Written in English

    Subjects:
  • Wave fronts.,
  • Algorithms.

  • Edition Notes

    Other titlesWavefront cache friendly algorithm for compact numerical schemes.
    StatementAlex Povitsky.
    SeriesICASE report -- no. 99-40., [NASA contractor report] -- NASA/CR-1999-209708., NASA contractor report -- NASA CR-209708.
    ContributionsLangley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15564681M

    I am creating a maze program, where the maze is randomly generated, and the user has to find a randomly place cube. Now, I want to be able to allow the game to solve itself, using a wavefront algorithm, Dijkstra's algorithm, or an A* algorithm?. Here is . Overlapping Computations and Communications with I/O 3 then detail the main contribution of this paper. Figure 2 shows the memory consumption of wavefront algorithms when data are dis-tributedfollowinga row distributionon a ring ofP processors. Each processorowns M/P rows of the data. Each row contains N elements.

    The title implies you are looking for information on implementing the wavefront algorithm but the body of the text seems more focused on localization, i.e. determining where one is at on a map. Would you please clarify? $\endgroup$ – DaemonMaker Jul 16 '13 at Wavefront Propagation Path Planning The wavefront propagation algorithm was chosen due to its suitability with grid based maps. This algorithm has emerged as the dominant method for path planning in discrete grid maps [Jennings, ]. The strategy is based on the propagation of wavefronts that encode the.

    Advanced Wavefront Control: Methods, Devices, and Applications IV Editor(s): Michael K. Giles ; John D. Gonglewski ; Richard A. Carreras *This item is only available on the SPIE Digital Library. The numerical results using the above scheme are compared with those given by Lighthill and Whitham. It is shown that the change in the Mach number along the wall is asymptotically proportional to square-root of the media nonlinearity parameter and the initial Mach number. Gholam-Ali Zakeri "Numerical Results For Wavefront Tracking", Proc Cited by: 3.


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Wavefront cache-friendly algorithm for compact numerical schemes Download PDF EPUB FB2

Compact numerical schemes provide high-order solution of PDEs with low dissipation and dispersion. Computer implementation of these schemes requires numerous passes of data through cache memory that considerably reduces performance of these schemes. To reduce this difficulty, a novel algorithm is proposed by: 2.

This study proposes a new formulation of a compact-scheme based numerical algorithm which sweeps through data only twice per stage of RK. The algorithm is based on a wavefront approach, where current front nodes are computed using only the values at previous fronts.

Then this algorithm is expanded to any number of levels of cache by: 2. Cache-Friendly Algorithm The second step of the Thomas algorithm is backward substitution (BS) The coefficients ok, bk, and ck are constant for compact schemes; therefore, LU factorization is performed only once and the first step computations include only forward substitution (6).

Wavefront Cache-friendly Algorithm for Compact Numerical Schemes Alex Povitsky ICASE, Hampton, Virginia Institute for Computer Applications in Science and Engineering NASA Langley Research Center Hampton, VA Operated by Universities Space Research Association October Prepared for Langley Research Center under Contract NAS Compact numerical schemes provide high-order solution of PDEs with low dissipation and dispersion.

Computer implementation of these schemes requires numerous passes of data through cache memory that considerably reduces performance of these schemes. To reduce this di culty, anovel algorithm is proposed here.

AbstractCompact numerical schemes provide high-order solution of PDEs with low dissipation and dispersion. Computer implementation of these schemes requires numerous passes of data through cache memory that considerably reduces performance of these schemes. To reduce this difficulty, a novel algorithm is proposed : A.

Povitsky. The Wavefront Algorithm. The wavefront algorithm involves a breadth first search of the graph beginning at the destination point until it reaches the start point.

First, obstacles are marked with a 1 and your goal point is marked with a 2. Algorithms and Data Structures for Efficient Free Space Reclamation in WAFL Ram Kesavan, Rohit Singh, Travis Grusecki Yuvraj Patel Netapp University of Wisconsin-Madison [email protected] frh0,[email protected] [email protected] Abstract NetApp®WAFL®is a transactional file system that uses the copy-on-write mechanism to Cited by:   In this task, we will use the NXT mindstorrm robot kit to implement a path planning algorithm called the Wavefront algorithm.

The workspace for this task is a 5 by 4 square grid with obstacles identified by numbers. References Primary Sources. The Compact Genetic Algorithm was proposed by Harik, Lobo, and Goldberg in [], based on a random walk model previously introduced by Harik et al.

[].In the introductory paper, the cGA is demonstrated to be comparable to the Genetic Algorithm on standard binary string optimization problems. Get this from a library.

Wavefront cache-friendly algorithm for compact numerical schemes. [Alex Povitsky; Langley Research Center.]. Figure The wavefront propagation algorithm is a specialized version of Dijkstra's algorithm that optimizes the number of stages to reach the goal.

Once the approximation has been made, any of the methods discussed in Section can be used to compute a. Automating Wavefront Parallelization for Sparse Matrix Computations Anand Venkat, Mahdi Soltan Mohammadiy, Jongsoo Park, Hongbo Rong, Rajkishore Barik, Michelle Mills Stroutyand Mary Hallz Parallel Computing Laboratory, Intel Corporation; Email:,@ Optical wavefront reconstruction algorithms played a central role in the effort to identify gross manufacturing errors in NASA's Hubble Space Telescope (HST).

NASA's success with reconstruction algorithms on the HST has led to an effort to develop software that can aid and in some cases replace complicated, expensive, and error-prone by: Wavefront. This is an Arduino module that defines the wavefront algorithm. The plan is to use this for some sort of self-navigation for the little robot guy.

Tests. If you want to run the tests for the project, you must have CppUnit installed in your environment. Books; Author services. information for authors; policies & permissions; resources; user services.

Wavefront picking for 3D tomography and full-waveform inversion. Splitting algorithms for the high-order compact finite-difference schemes in wave-equation modeling. Cai Zhang, Bingbing Sun. 1 Wave Algorithms n ring algorithm n tree algorithm n echo algorithm npolling algorithm 2 Wave Algorithms n Wave algorithm satisfies the following three properties u termination: each computation is finite u decision: each computation contains at least one decide event u dependence: in each computation each decide event is causally preceded by an event in each.

Multigrid is widely used as an efficient solver for sparse linear systems arising from the discretization of elliptic boundary value problems. Linear relaxation methods like Gauss-Seidel and Red-Black Gauss-Seidel form the principal computational component of multigrid, and thus affect its by: Algorithms.

After marking the live objects in the heap in the same fashion as the mark-sweep algorithm, the heap will often be fragmented. The goal of mark-compact algorithms is to shift the live objects in memory together so the fragmentation is eliminated.

The challenge is to correctly update all pointers to the moved objects. Numerical oscillations generated by the Compact scheme is mitigated by the high order filtering. The high order multi-resolution algorithm is employed to detect the smoothness of the solution.

The Hybrid scheme allows a potential speedup up to a factor of three or more for certain classes of shocked by: 1. Splitting algorithms for the high-order compact finite-difference schemes in wave-equation modeling Cai Zhang 1, Bingbing Sun 2, Jianwei Ma 3, Huizhu Yang 2, and Ying Hu 4.Journal of Theoretical and Computational Acoustics (JTCA) ( Vol.

26 Iss. 1 onwards) Formerly known as Journal of Computational Acoustics (JCA) ( Vol. 1 Issue 1 - .Compact numerical schemes provide high-order solution of PDEs with low dissipation and dispersion.