DocumentCode
419317
Title
Role of numerical noise in ultra large-scale computing
Author
Hastriter, M.L. ; Chew, W.C.
Author_Institution
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Volume
3
fYear
2004
fDate
20-25 June 2004
Firstpage
3373
Abstract
We have reviewed the role of numerical noise (round off error) in different parts of computations. It is seen that product error is insignificant. Subtraction error can play a significant role when a system is ill conditioned or involves subtracting large numbers to obtain small numbers. However, phase error due to round off can dominate for ultra-large scale problems involving hundreds of wavelengths.
Keywords
computational electromagnetics; roundoff errors; computational electromagnetics; ill conditioned system; numerical noise; phase error; product error; round off error; subtraction error; ultra large-scale computing; Computational electromagnetics; Differential equations; Electromagnetic radiation; Green´s function methods; Integral equations; Large-scale systems; Noise generators; Nonuniform electric fields; Sparse matrices; Surface waves;
fLanguage
English
Publisher
ieee
Conference_Titel
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN
0-7803-8302-8
Type
conf
DOI
10.1109/APS.2004.1332103
Filename
1332103
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