Лабораторная работа №5 «Знакомство с пакетом mc9. Исследование ключа на биполярном транзисторе и инвертора КМДП» по дисциплине «Схемотехника» для направления 09.03.01. «Информатика и вычислительная техника» подготовки бакалавра
The aim is to consolidate the theoretical knowledge in areas of "Analog circuit design", "Transistors", "Transfer function". In this manual describes the features of the software package Micro-Cap. Provides a means of simulating transistors, the build time diagrams, research the transmission characteristics of different keys without load and with load. At the end of the laboratory work the student must learn the basic options package Micro-Cap. The student must have an idea of to be able to explain the obtained simulation results: influence of load parameters on the dynamic parameters and transfer feature key for your version of the job and to answer questions on the topic.
Control systems are exposed to unintentional errors, deliberate intrusions, false data injection attacks, and various other disruptions. In this paper we propose, justify, and illustrate a rule of thumb for detecting, or confirming the absence of, such disruptions. To facilitate the use of the rule, we rigorously discuss underlying results that delineate the boundaries of the rule’s applicability. We also discuss ways to further widen the applicability of the proposed intrusion-detection methodology.
The aim of this work is the study of the mode of operation of the circuit of the operational amplifier by simulating the modes using the software package MicroCap and consolidate the theoretical material in the section "Analog circuit design". This manual provides a description of the frequency properties of analog devices, their parameters, units of measurement on the example of the operational amplifier. Shows how to measure these parameters using the built-in means of the program MicroCap. The student must have representation on logarithmic scale of measurement, be able to explain the obtained simulation results: amplification factor, frequency response, phase response, for their version of the task and to answer questions on the topic.
In this paper we present a radio frequency precision sensor on rectangular spirals with the opposite direction of winding. The sensor is purposed to control and measure the gap to a flat metal surface. The sensor model was created using CST Studio Suite software. Using this model, we obtained relation between the gap width and change of electrodynamic parameters of the sensor. A schematic diagram of the sensor's measuring generator based on a modification of the Colpitts LC-generator was developed, and its characteristics were obtained in the PSpice. This paper also indicates the advantages of using proposed sensor as a base for various devices and systems for monitoring, measurement and controlling of physical quantities and parameters of technological processes.
When dealing with control systems, it is useful and even necessary to assess the performance of underlying transfer functions. The functions may or may not be linear, may or may not be monotonic. They may have structural breaks and other aberrations that require monitoring and quantification to aid decision making. The present paper develops such a methodology, which is based on an index of increase that naturally arises as the solution to an optimization problem. The performance of an empirical counterpart of the index is explored theoretically and illustrated numerically.
This manual is aimed at the study of the mode of operation of the circuits of the integrator and differentiator based on an operational amplifier by simulating the modes using the software package Micro-Cap and consolidate the theoretical material in the section "Analog circuit design". These manual contains the description of integrator and differentiator working principles and configuration methods of elimination the output voltage effects of drift due to the excitation of operational amplifier underlying operating scheme.
The paper presents a new approach to the construction of reduced linear system in the form of rational transfer functions. The approach is based on the minimization of approximation error defined by an integral criterion. The approach modification aimed at the model order minimization under the given error norm is also provided. The approach extension to the case of vector transfer functions is considered. The developed computational algorithm is based on the Gauss-Newton method. Testing examples presented in the paper confirm the method efficiency.
A model for organizing cargo transportation between two node stations connected by a railway line which contains a certain number of intermediate stations is considered. The movement of cargo is in one direction. Such a situation may occur, for example, if one of the node stations is located in a region which produce raw material for manufacturing industry located in another region, and there is another node station. The organization of freight traﬃc is performed by means of a number of technologies. These technologies determine the rules for taking on cargo at the initial node station, the rules of interaction between neighboring stations, as well as the rule of distribution of cargo to the ﬁnal node stations. The process of cargo transportation is followed by the set rule of control. For such a model, one must determine possible modes of cargo transportation and describe their properties. This model is described by a ﬁnite-dimensional system of diﬀerential equations with nonlocal linear restrictions. The class of the solution satisfying nonlocal linear restrictions is extremely narrow. It results in the need for the “correct” extension of solutions of a system of diﬀerential equations to a class of quasi-solutions having the distinctive feature of gaps in a countable number of points. It was possible numerically using the Runge–Kutta method of the fourth order to build these quasi-solutions and determine their rate of growth. Let us note that in the technical plan the main complexity consisted in obtaining quasi-solutions satisfying the nonlocal linear restrictions. Furthermore, we investigated the dependence of quasi-solutions and, in particular, sizes of gaps (jumps) of solutions on a number of parameters of the model characterizing a rule of control, technologies for transportation of cargo and intensity of giving of cargo on a node station.
Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.
Event logs collected by modern information and technical systems usually contain enough data for automated process models discovery. A variety of algorithms was developed for process models discovery, conformance checking, log to model alignment, comparison of process models, etc., nevertheless a quick analysis of ad-hoc selected parts of a journal still have not get a full-fledged implementation. This paper describes an ROLAP-based method of multidimensional event logs storage for process mining. The result of the analysis of the journal is visualized as directed graph representing the union of all possible event sequences, ranked by their occurrence probability. Our implementation allows the analyst to discover process models for sublogs defined by ad-hoc selection of criteria and value of occurrence probability
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