Join the Department of Computer Science as we welcome Fulbright Scholar and Visiting Professor, Dmitry Zaitsev, for the lecture Sleptsov Net Computing. 

Link to the talk slides:  Slides

Abstract: 

Petri nets have been known for years as a model of concurrent systems but their computationally universal extensions are exponentially slow comparing Turing machines, especially when implementing arithmetic operations. A Sleptsov net concept, suggested quarter a century ago, recently acquired its second birth due to its ability of fast implementation of basic arithmetic operations. Firing a transition in a few instances at a step leads to universal constructs which run in polynomial time. In Sleptsov net computing, a program, written in Sleptsov net language preserving concurrency of an application area, runs on Sleptsov net processor which implements concurrent firing of transitions in multiple instances providing fast computations. Motivation for new models of hyper-computations is presented. Sleptsov net is introduced compared to Petri and Salwicki nets. A concept of universal Sleptsov net, as a prototype of a processor in Sleptsov net computing, is discussed. A small universal Sleptsov net that runs in polynomial time is constructed; it consists of 13 places and 26 transitions. Principles of programming in Sleptsov nets, as composition of reverse control flow and data, are developed. Standard control flow patterns include sequence, branching, loop, and parallel execution. Basic modules, which implement efficiently copying, logic, and arithmetic operations, are developed. Special dashed arcs are introduced for brief specification of input and output data of modules (subnets). Ways of hierarchical composition of a program via substitution of a transition by a module are discussed. Examples of Sleptsov net programs for data encryption, fuzzy logic, and partial differential equations are presented. Enterprise implementation of Sleptsov net computing promises ultra-performance. (History of Sleptsov nets) 

Basic publications

Zaitsev D.A. Sleptsov Net Computing (pp. 7731-7743) Chapter 672 in Mehdi Khosrow-Pour (Ed.) Encyclopedia of Information Science and Technology, Fourth Edition (10 Volumes). IGI-Global: USA, 2017.

Zaitsev D.A. Sleptsov Nets Run Fast, IEEE Transactions on Systems, Man, and Cybernetics: Systems, 2016, Vol. 46, No. 5, 682 – 693. 

Bio:

Dmitry A. Zaitsev received the Eng. degree in applied mathematics from Donetsk Polytechnic Institute, Donetsk, Ukraine, in 1986, the Ph.D. degree in automated control from the Kiev Institute ​ of Cybernetics, Kiev, Ukraine, in 1991, and the Dr.Sc. degree in telecommunications from the Odessa National Academy of Telecommunications, Odessa, Ukraine, in 2006. Since 2009, he has been with International Humanitarian University, Odessa, Ukraine, where he is currently a Professor of Computer Engineering. Since 2014, he has been with Vistula University, Warsaw, Poland, where he is currently a Professor of Computer Science. He developed generalized neighborhood for cellular automata, universal Petri nets, the analysis of infinite Petri nets with regular structure, the decomposition of Petri nets in clans, and the method of synthesis of fuzzy logic function given by tables. His current research interests include Petri net theory and its application in networking, production control, and computing. He is a senior member of ACM. His CV, publications, software, and models are put on his personal web-site http://daze.ho.ua

The talk will take place on October 10, 2017, New Computer Science, Room 120, at 2:30p.