RT Journal Article SR Electronic A1 Dohnal, Vlastimil A1 Kuča, Kamil A1 Jun, Daniel T1 WHAT ARE ARTIFICIAL NEURAL NETWORKS AND WHAT THEY CAN DO? JF Biomedical papers YR 2005 VO 149 IS 2 SP 221 OP 224 DO 10.5507/bp.2005.030 UL https://biomed.papers.upol.cz/artkey/bio-200502-0006.php AB The artificial neural networks (ANN) are very often applied in many areas of toxicology for the solving of complex problems, such as the prediction of chemical compound properties and quantitative structure-activity relationship. The aim of this contribution is to give the basic knowledge about conception of ANN, theirs division and finally, the typical application of ANN will be discussed. Due to the diversity of architectures and adaptation algorithms, the ANNs are used in the broad spectrum of applications from the environmental processes modeling, through the optimization to quantitative structure-activity relationship (QSAR) methods. In addition, especially ANNs with Kohonen learning are very effective classification tool. The ANNs are mostly applied in cases, where the commonly used methods does not work.