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» On Unbiased Linear Approximations
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AUTOMATICA
2000
72views more  AUTOMATICA 2000»
14 years 9 months ago
Direct iterative tuning via spectral analysis
This paper introduces a nonparametric frequency-domain scheme for tuning closed-loop systems. A linear quadratic criterion is used for guiding the system towards an optimal-regula...
Leonardo C. Kammer, Robert R. Bitmead, Peter L. Ba...
75
Voted
FSE
1994
Springer
125views Cryptology» more  FSE 1994»
15 years 1 months ago
Linear Cryptanalysis Using Multiple Approximations and FEAL
We describe the results of experiments on the use of multiple approximations in a linear cryptanalytic attack on FEAL; we pay particular attention to FEAL-8. While these attacks on...
Burton S. Kaliski Jr., Matthew J. B. Robshaw
JC
2006
97views more  JC 2006»
14 years 9 months ago
Optimal approximation of elliptic problems by linear and nonlinear mappings II
We study the optimal approximation of the solution of an operator equation A(u) = f by four types of mappings: a) linear mappings of rank n; b) n-term approximation with respect t...
Stephan Dahlke, Erich Novak, Winfried Sickel
MOC
2000
83views more  MOC 2000»
14 years 9 months ago
On the problem of spurious eigenvalues in the approximation of linear elliptic problems in mixed form
In the approximation of linear elliptic operators in mixed form, it is well known that the so-called inf-sup and ellipticity in the kernel properties are sufficient (and, in a sens...
Daniele Boffi, Franco Brezzi, Lucia Gastaldi
DAGSTUHL
2004
14 years 11 months ago
Optimal Approximation of Elliptic Problems by Linear and Nonlinear Mappings
We study the optimal approximation of the solution of an operator equation A(u) = f by four types of mappings: a) linear mappings of rank n; b) n-term approximation with respect t...
Erich Novak, Stephan Dahlke, Winfried Sickel