In this paper we study the theoretical properties of the deflation-based FastICA method, the original symmetric FastICA method, and a modified symmetric FastICA method, here called the squared symmetric FastICA. This modification is obtained by replacing the absolute values in the FastICA objective function by their squares. In the deflation-based case this replacement has no effect on the esti...

In this short paper, we recall the use of squared slacks used to transform inequality constraints into equalities and several reasons why their introduction may be harmful in many algorithmic frameworks routinely used in nonlinear programming. Numerical examples performed with the sequential quadratic programming method illustrate those reasons. Our results are reproducible with state-of-the-ar...

We present techniques used in the implementation of an efficient constraint program for the portfolio optimization (PO) problem. This important combinatorial problem in the credit derivatives market arises for example when constructing synthetic collateralized debt obligations (CDOs) squared. A close relationship with the balanced incomplete block design (BIBD) problem exists which we make use ...

background and objective: intraoperative consultation by frozen section is a high – risk procedure with important consequences. therefore, it is critical to determine efficiency of frozen section performance periodically. this study was performed to determine the accuracy of frozen section in urmia university of medical sciences. materials & methods:inthis cross sectional study, we compare...