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IMPCOL E: Chemical engineering plant models
Hydrocarbon separation problem

from set CHEMIMP, 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 ] 161840 bytes


Matrix Statistics

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Size Type
225 x 225, 1308 entries real unsymmetric
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
1303 56 818 429 2362
Column Data Row Data
Average nonzeros per column : 5.8
Standard deviation : 6.9

indexnonzeros
longest37 23
shortest10 1

Average nonzeros per row : 5.8
Standard deviation : 4.5

indexnonzeros
longest36 12
shortest1 1

Bandwidths Profile Storage
lower93 upper36
average |i-j|23 std.dev.22
minmaxave.std.dev.
lower bandwidth0 92 26 26
upper bandwidth0 35 9.6 9.9

Nonsymmetric skyline storage 7768

Heaviest diagonals
offset from main0 1 3 11 12 6 -23 -4 -17 -6
nonzeros56 46 30 30 29 27 25 25 24 24
accumulated percent 4.30 7.8310.1312.4314.6616.7318.6520.5722.4124.25

Top 10 out of 120 nonvoid diagonals.
Conditioning
Frobenius norm1.6e+04 condition number (est.)9.3e+06
2-norm (est.)5e+03 diagonal dominanceno


Set Information

Set CHEMIMP
Source: David Bogle, Imperial College, London
Discipline:Chemical engineering
Accession:August 1982


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Last change in this page: Wed Sep 22 13:33:31 US/Eastern 2004 [Comments: ]