Useful Transformations
نویسنده
چکیده
These notes describe a number of ways by which a parameter vector (or matrix) β can be expressed as a function of an unrestricted parameter vector θ in such a way that any value of θ produces a β with a desired characteristic and such that any β with that characteristic can be obtained with some value of θ. Alternatively, it may be useful to have a transform that defines θ on a simple bounded region. This can facilitate direct search routines (grid or randomized searches).
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تاریخ انتشار 2009