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A challenging surface
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Beßt navigates this difficult, corrugated surface, where curved valleys cyclone in to the minimum. Compare Beßt solutions and progress against any other commercial package and method.
Download Cyclone.xls
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Extremely difficult, irregular surfaces
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This surface has two opposite folds that meet at the minimum.
Folded or dented surfaces are difficult in the extreme. Attempt this with alternative methods for comparison to Beßt.
Download PaperFold.xls
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Highly correlated parameters
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Conversion ξ of a reactant in a 2nd order chemical reaction varies in time as follows:
ξ = ko exp(-Ea/RT) Co t
(1 + ko exp(-Ea/RT) Co t)
This problem is challenging and illustrative because the parameters ko and Ea are highly correlated.
If the user were to linearize the analysis --as is widely practiced for equations and data that lend
themselves to linearization, for lack of a Beßt nonlinear optimization solution --
users would obtain erroneous results, and especially for the highly sensitive activation energy parameter.
Download 2ndorderreaction.xls
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NIST Examples
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Beßt solves NIST benchmarks -- with benchmark performance.
Intro to NIST
NIST Non-Linear Standards
NIST Non-Linear Benchmark Problems
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Download Beßt results on difficult NIST benchmarks:
Bennet5.xls
Eckerle4.xls
Rat43.xls
Thurber.xls
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User Defined
Functions
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Explore how Beßt works with user-defined functions created in Excel.
Download HelicalValley.xls
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