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WEST2021: Chemical engineering plant models
Fifteen stage column section, all rigorous

from set CHEMWEST, from the Harwell-Boeing Collection

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Visualizations

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Structure Plot City Plot
structure plot city plot
Spectral Portrait 3D Interactive City Plot
spectral portrait

[ VRML Version 2, gzipped ] 201558 bytes


Matrix Statistics

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Size Type
2021 x 2021, 7353 entries real unsymmetric
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
7310 5 4350 2955 14586
Column Data Row Data
Average nonzeros per column : 3.6
Standard deviation : 3.7

indexnonzeros
longest88 26
shortest82 1

Average nonzeros per row : 3.6
Standard deviation : 2.4

indexnonzeros
longest774 12
shortest1 1

Bandwidths Profile Storage
lower1888 upper1309
average |i-j|4.3e+02 std.dev.3.3e+02
minmaxave.std.dev.
lower bandwidth2 2003 4.3e+02 3.2e+02
upper bandwidth2 1976 7.8e+02 5.3e+02

Nonsymmetric skyline storage 2436401

Heaviest diagonals
offset from main13 12 10 16 -547 -504 -461 -418 -375 -332
nonzeros42 33 31 31 29 29 29 29 29 29
accumulated percent 0.57 1.03 1.45 1.87 2.27 2.67 3.06 3.46 3.86 4.25

Top 10 out of 1485 nonvoid diagonals.
Conditioning
Frobenius norm1.8e+06 condition number (est.)7.5e+12
2-norm (est.)3.2e+05 diagonal dominanceno


Set Information

Set CHEMWEST
Source: Art Westerberg, University of Pittsburgh
Discipline:Chemical engineering
Accession:Summer 1983


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Last change in this page: Wed Sep 22 13:33:32 US/Eastern 2004 [Comments: ]