%0 Journal Article %T Dynamic System Using Conjunctive Operator %A J¨®zsef Dombi %A J¨®zsef D¨˘niel Dombi %J Acta Polytechnica Hungarica %D 2006 %I ?buda University %X We present a tool to describe and simulate dynami systems. We use positive andnegative influences. Our starting point is aggregation. We build positive and negativeeffects with proper transformations of the sigmoid function and using the conjunctiveoperator. From the input we calculate the output effect with the help of the aggregationoperator. This algorithm is comparable with the concept of fuzzy cognitive maps. %K dynamic system %K pliant concept %K dombi operator %U http://uni-obuda.hu/journal/Dombi_Dombi_5.pdf