Kovalenko A. Models and methods for synthesis and reconfiguration of computer systems and networks architectures of critical application objects

The thesis is devoted to solving of actual scientific and applied problem of ensuring the operativeness requirements for information exchange process in computer systems (CS) of critical application objects (CAO) on the basis of mathematical apparatus (mathematical models and methods) development intended for synthesis of new and reconfiguration of existing architectures of computer systems and networks. It was performed an analysis of the problem, appropriate trends of CAO CS, as well as the requirements for architectures of CAO CS and networks. The results revealed that currently existing models intended for synthesis and reconfiguration of CAO CS does not always lead to meet the operativity requirements for the process of information exchange in CAO CS and networks (CSN). This circumstance determines the need to improve the corresponding classical mathematical tools to increase the operativity of information transmission. It was developed a complex of methods for multiparameter synthesis of CAO CSN that optimizes the costs of constructing components of the critical application object CS, which ensure the meeting of operativity requirements. It was developed a further improvement for the model of tasks distribution process within the components of distributed CAO CS that allows significant accelerating the solution of the optimization problem in a case of large dimensions. It was developed a complex of evolution models for CAO computer networks (CN) that allows executing the prediction of network architecture changes during a fixed time interval. It was developed a complex of reconfiguration methods for CAO CN that allows adjusting the set of operation parameters of wireless components of the network in order to reduce the time of information transmission. It was improved a mathematical model describing the operation of CAO CN cloud component that allows accelerating the process of information transmission. It was improved a method of optimal time scales constructing for approximating the length of CAO CN queues that allows determining the length of queues during network reconfiguration. It was improved a method for information transmission in a wireless segment of CAO CN that allows reducing the time of information transmission.