Maryam Yassi - Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran
Alireza Yassi - Department of Information technology, Asia Pacific University, kualalumpur, Malaysia
Mehdi Yaghoobi - Department of Artificial Intelligence, Mashhad Branch, Islamic Azad University, Mashhad, Iran

Breast Cancer Diagnosis and Prognosis are two medical applications pose a great challenge to the researchers. The use of machine learning and data mining techniques hasrevolutionized the whole process of breast cancer Diagnosis and Prognosis. Breast tumors are divided in to two types;malignant and benign. In this paper we propose how todistinguish the type of breast cancer by creating a Fuzzy system (FS). To detect the type of breast censer we use achaotic hierarchical cluster-based multispecies particle swarm optimization (CHCMSPSO) to optimization a FS indeed. Theobjective of this paper is to learn Takagi-Sugeno-Kang (TSK) type fuzzy rules with high accuracy. In addition to this, we will introduce chaos into the HCMSPSO in order to furtherenhance its global search ability. In the paper, eleven chaotic maps are used in the intelligent diagnosis system. The accuracyrate of distinguishing between benign and malignant censer is above 90 percent. However, among the chaotic maps, theSinusoidal chaotic map provides us with the accuracy rate 99percent because it coordinates with the problems conditions. This simulation is performed on UCI-Breast Censer data-base.

particle swarm optimization; Fuzzy system; chaotic theory; chaotic maps