ampling" class="ajax-links">Latin-Hypercube sampling techniques</a>, including <a href="http://people.sc.fsu.edu/~jburkardt/datasets/ihs/ihs.html" target="_blank">Improved Distributed Hypercube Sampling (IDHS)</a></li>
<li>alternative implementations of the Levenberg-Marquardt optimization technique including <a href="http://www.gnu.org/s/gsl/" target="_blank">GSL</a>, <a href="http://www.roguewave.com/products/imsl-numerical-libraries.aspx" target="_blank">IMSL</a>, <a href="http://www.ics.forth.gr/~lourak