sparse matrix

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sparse matrix

[′spärs ′mā·triks]
(mathematics)
A matrix most of whose entries are zeros.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
For its part, Pickering Electronics has introduced its Series 124 4-mm x 4-mm reed relay that switches up to 5 W at 0.5 A, enabling a dense matrix in PXI (Figure 3).
Such evocations and associations swirled around a dense matrix of further allusions--expressed in titles as well as in statements by the artist and the curator, Horace Brockington--to the histories of slavery and lynching in the American South, to free jazz and the Harlem Renaissance, and to the spiritual uses of objects and visual idioms in West African, Islamic, and American Indian traditions.
There is no real consensus on the best design approaches with these lamps, so while some contain many emitters on a single board, forming a dense matrix, others may feature several boards containing a few emitters each.
Most commonly, only fine aggregates such as sand and glass powder are used in UHPC, creating a gradation that, when combined with the cement, provides a dense matrix with a discontinuous pore structure that prevents moisture from penetrating the concrete and significantly reduces permeability compared to conventional concrete.
As a membrane for GBR, the PRF dense matrix architecture covers, protects, and stabilizes bone graft material and operative site in general.
Besides, because of the columns in dense matrix depending on each other strictly in order, the parallelism among columns only exists in sparse matrix decomposition.
However, it requires a lot of memory and calculation time when solving large dense matrix equations using the lower/upper (LU) decomposition based direct solver.
One of these products is the leucocyte and platelet-rich fibrin (L-PRF), a platelet concentrate characterized by containing a dense matrix of fibrin, platelets, and leucocytes, thus representing a considerable improvement over its predecessor, platelet-rich plasma (PRP) [3].
Cartilage repair is very difficult to achieve due to the impossibility for the chondrocyte to migrate through the dense matrix, the absence of mesenchymal cells within the cartilage, and absence of blood vessels.
The latter relies on a hierarchical multipole decomposition of the MoM dense matrix interactions allowing for O(N log N) solution of the dense matrix equations.
Accurate calculation of parameters of microstrip structures with numerical techniques requires the solution of dense matrix equations involving thousands of unknowns.
Despite the fact that the matrix exponential [PHI] is a sparse matrix for a small time step, the matrix [T.sub.a] may be a dense matrix in the implementation of (18)-(20) because of the accumulation of computer roundoff error.

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