Современные информационные технологии в профессиональной деятельности: труды международной научно-практической конференции "СИТ-2014"
The methodology of application of circuit simulation programs in the educational process of learning students of information and technical specialties in the system of higher and specialized secondary education is under consideration in the article. There is an example of the use of this methodology for computer simulation and studying the principles of designing and working of the random access memory of the microcomputer using Electronics Workbench.
The workshop is intended for the acquisition of practical skills of computer simulation and study of the functional components and devices of microcomputers using circuit simulation program "Electronic Workbench" students of higher and secondary educational institutions, students of architecture, organization, circuitry and computer modeling of digital components and devices of the computer.
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).
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.
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.
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.
In this paper, power MOS transistor behavior under charged board model (CBM) ESD impact is considered. The analysis of the MOSFET failure condition at the CBM ESD event is performed. The CBM equivalent circuit is proposed. The physical parameters of the PCB and device under test are replaced by the lumped RCL circuit. The MOSFET failure voltage calculation method is developed. This method is based on the transient analysis of the CBM ESD equivalent circuit with the general purpose open-source circuit simulator Qucs. This simplified method allows us to calculate CBM ESD voltage dangerous for the MOSFET with less than 20% error for some application cases (pins without ESD protection). CBM ESD tests are performed. Simulation and measurement results are in good match.
Students' internet usage attracts the attention of many researchers in different countries. Differences in internet penetration in diverse countries lead us to ask about the interaction of medium and culture in this process. In this paper we present an analysis based on a sample of 825 students from 18 Russian universities and discuss findings on particularities of students' ICT usage. On the background of the findings of the study, based on data collected in 2008-2009 year during a project "A сross-cultural study of the new learning culture formation in Germany and Russia", we discuss the problem of plagiarism in Russia, the availability of ICT features in Russian universities and an evaluation of the attractiveness of different categories of ICT usage and gender specifics in the use of ICT.
In this paper we consider choice problems under the assumption that the preferences of the decision maker are expressed in the form of a parametric partial weak order without assuming the existence of any value function. We investigate both the sensitivity (stability) of each non-dominated solution with respect to the changes of parameters of this order, and the sensitivity of the set of non-dominated solutions as a whole to similar changes. We show that this type of sensitivity analysis can be performed by employing techniques of linear programming.
Let G be a semisimple algebraic group whose decomposition into the product of simple components does not contain simple groups of type A, and P⊆G be a parabolic subgroup. Extending the results of Popov , we enumerate all triples (G, P, n) such that (a) there exists an open G-orbit on the multiple flag variety G/P × G/P × . . . × G/P (n factors), (b) the number of G-orbits on the multiple flag variety is finite.
I give the explicit formula for the (set-theoretical) system of Resultants of m+1 homogeneous polynomials in n+1 variables