Минимаксная оптимизация в задачах схемотехнического проектирования
The directions of improvement of minimax methods for circuit design problems are considered. The choices of generalized quality criterion for the circuit design is discussed. It is concluded that the minimax criterion has advantages over other formulations of design targets. New approach to setting of individual objectives for each performance indicator is proposed. The approach extends well-known weighting techniques based on designer’s experience to the representation of arbitrary piecewise linear dependences. From the analysis of known minimax optimization algorithms, it was considered that the method of sequential linearized minimax solvings should be the basis of the computational algorithm. Main directions of the development of minimax optimization methods are proposed taking into account specific features of simulation algorithms included in the optimization procedure. The directions are based on the stepsize adaptability, asynchronous performances evaluations and the simulation accuracy control. The possible need for the multi-objective formulation of minimax problem is illustrated by the circuit example. An outline of the linear minimax optimization algorithm taking into account the possible multicriteria is presented.
This paper presents a new integration technique for time-domain simulation of nonlinear electronic circuits. The new technique exploits A-stable single-step integration methods of order 1 up to 4 obtained by applying the Obreshkov formula to charge oriented circuit equations. The predictor-corrector algorithm exploited in the transient analysis for solving the initial value problem is described. The numerical examples of time-domain simulation are given which demonstrate the numerical accuracy and efficiency of the proposed technique.
Recent results on non-convex multi-objective optimization problems and methods are presented in this book, with particular attention to expensive black-box objective functions. Multi-objective optimization methods facilitate designers, engineers, and researchers to make decisions on appropriate trade-offs between various conflicting goals. A variety of deterministic and stochastic multi-objective optimization methods are developed in this book. Beginning with basic concepts and a review of non-convex single-objective optimization problems; this book moves on to cover multi-objective branch and bound algorithms, worst-case optimal algorithms (for Lipschitz functions and bi-objective problems), statistical models based algorithms, and probabilistic branch and bound approach. Detailed descriptions of new algorithms for non-convex multi-objective optimization, their theoretical substantiation, and examples for practical applications to the cell formation problem in manufacturing engineering, the process design in chemical engineering, and business process management are included to aide researchers and graduate students in mathematics, computer science, engineering, economics, and business management.
The possibilities of commercial SPICE are expanded in the new field—space environment electronics design. For this purpose, the set of BJT and MOSFET models with account for radiation influence is included into commercial SPICE device library. The characteristics of devices and circuits subjected to space radiation exposure (gamma-rays, protons, neutrons, electrons, heavy ions) are presented and examined with emphasis on application for radiation hardened electronics systems.
Issues of interfunctional conflicts, connected with the management of material flows, are topical for many companies that operate in the Russian market. In order to finish the conflict, align the standpoints of its participants, it is required firstly to identify their goals and interests. The article is devoted to the ways of revelation of the choice criteria for the company’s functional departments – parties of the conflict, as well as to the means of their preferences formalization.
Qucs open-source circuit simulator and its applications for educational and research applications in field of EMC and ESD are considered. Its advantages and disadvantages are considered. New features introduced in Qucs are considered. One of the authors is Qucs developer.
The manual is devoted to the mathematical theory and methods of optimization applied to administrative decisions in economy. Volume 1 described approaches to mathematical modeling of management problems in economy and methods of mathematical programming tasks solution. Besides strict mathematical proofs, there are directing reasons, which is sometimes enough for understanding. There are many economic examples and exercises with detailed solutions. Readers are supposed to know the bases of the mathematical analysis and linear algebra, though necessary data from these courses in a concise form are provided in appendices.
The paper gives brief information about the program of circuit simulation, Electronics Workbench and its working components. The questions of using this program for modeling and research of microcomputers are reviewed. Structural and functional schemes 4-bit microcomputers are discussed.
The article deals with the general approach to the construction of a distributed system of circuit simulation as part of information support of the product life cycle. The implementation of these approaches is demonstrated on the example of the creation of one of the elements of the system. This work/article is an output of a research project implemented as part of the Basic Research Program at the National Research University Higher School of Economics (HSE).