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TECHNICAL UNIVERSITY - SOFIA: Recent submissions

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Title: Nonlinear adaptive controller for activated sludge process Author: Georgieva, Petya Georgieva; Георгиева, Петя Георгиева Date: 1999 Abstract: The concept of adaptive 2.-tracking is applied as feedback control strategy to activated sludge process. The control objective is to track a varying reference signal asymptotically only within a pre-defined small tracking error in the presence of actuator constraints. The control design is based on the dynamical mass balance equations of ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Идентификация на измервателни преобразуватели и уреди Author: Маджарова, Мария Димитрова; Иванова, Мариола Найденова; Madzharova, Mariya Dimitrova; Ivanova, Mariola Naydenova Date: 1999 Abstract: In this report deteministic and statistical approach are applied for finding parametric and nonparametric models of thermo - converters. By means of real experiments based on warming-up and cooling in wailer surrounding the corresponding time - responce characteristics are optained. Two ways are applied for the calculation of parameters of ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Оптимално сингулярно адаптивно наблюдение и моделиране на електромеханична система Author: Люцканов, Коста Димитров; Lyutskanov, Kosta Dimitrov Date: 1999 Abstract: The results from the application of an algorithm for optimal singular adaptive observation for the identification of the parameters and the estimation of the initial and the current state vector of an electromechanical system are presented in the report. They can be used for the synthesis of an adaptive control. As an example a two mass ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Оптимално сингулярно адаптивно наблюдение и моделиране на електротермични процеси при дикертно електросъпротивително нагряване при неизвестни смущения Author: Тахрилов, Христофор Петков; Tahrilov, Hristofor Petkov Date: 1999 Abstract: A mathematical apparatus for optimal singular adaptive observation and modeling has worked at Technical University of Varna since 1980. It is made for process modeling of direct electric resistance heating of metal parts. It is necessary because of high speeds of combine electrical and thermal processes by existing casual disturb factors. ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Метод за измерване на турбулентния шум на акустични гласови сигнали Author: Митев, Петър Димитров; Mitev, Petar Dimitrov Date: 1999 Abstract: In this article a new acoustic parameter for the objective description of human voice quality is introduced. It indicates the turbulent noise generated in the vocal tract and it is named Turbulent Noise Index (TNI). A method for calculating of TNI is described. Experiments with synthetic voice signals show that THI is almost independent of ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: MATLAB - implementation of MM2A1 – algorithm for reduced order optimal singular adaptive observation of MIMO linear discrete systems Author: Sotirov, Emil Mihailov; Nikolov, Nikola Nikolaev; Сотиров, Емил Михайлов; Николов, Никола Николаев Date: 1999 Abstract: MATLAB-implementation of an algorithm for synthesis of the new generation of discrete reduced order adaptive observers, including reduced optimal estimators of the initial state vector, identifiers of parameters and discrete reduced optimal singular (full and degenerate) adaptive observers of the current state vector, for MIMO linear discrete ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: MATLAB - implementation of MMNSA 1 – algorithm for optimal singular adaptive observation of siso linear discrete systems with unknown disturbance Author: Sotirov, Lyubomir Nikolaev; Сотиров, Любомир Николаев; Nikolov, Nikola Nikolaev; Николов, Никола Николаев Date: 1999 Abstract: MATLAB-implementation of an algorithm for synthesis of the new generation of discrete adaptive observers, including optimal estimators of the initial state vector of the system and initial state vector of the disturbance, identifiers of parameters, discrete observers of current state vector of the disturbance and discrete optimal singular ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Идентификация на системи – проблематика и традиции Author: Гарипов, Емил Михайлов; Garipov, Емил Михайлов Date: 1999 Abstract: Author's personal view on the study and research development in the field of system identification during the last 25 years in the Faculty of Automatics is written down. A survey is made about the problems, which stay in the focus of permanent interest of the professors and their assistants as a response of the theoretical ideas and ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Прогнози и догадки за ролята на дигиталните технологии в обучението и образованието – от зората на компютъра до дигиталната епоха Author: Пеев, Ивайло Иванов; Peev, Ivaylo Ivanov Date: 2021 Abstract: The topic of the article was brought about by the place of technical devices and Internet in contemporary foreign language teaching, going back and observing predictions from the past about the place of the computer in the learning process, within the texts of methodologists and linguists of 20 years ago. Noteable are the initial attempts ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Изчисляване на стационарните режими в асинхронни машини при използване на нелинеен модел на интервален метод Author: Колев, Любомир Варадинов; Божилов, Ганчо Йорданов; Пенев, Димитър; Kolev, Lyubomir Varadinov; Bozhilov, Gancho Yordanov; Penev, Dimitar Date: 1999 Abstract: In this paper, the problem of numericaly mining the steady-state in asinchronous mashines is considered. Based on a appropriate mathematic model the original problem is reduced to a system of four nonlinear algebraic equations. The solution of the latter system is obtained using an efficient interval method which guarantees convergence and ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Приложение на Марковските процеси за вземане на решение в моделите за поддържане на технологично оборудване при интервална параметрична неопределеност Author: Гатев, Гео Иванов; Пулева, Теофана Тодорова; Gatev, Geo Ivanov; Puleva, Teofana Todorova Date: 1999 Abstract: An application of Markovian Decision Processes for solving machine maintenance problem is considered. The model's uncertainty is described by interval matrix of expected cost. On the base of interval extensions of the Policy-Improvement Algorithms, Criterion of Discounted Costs, Method of Succesive Approximations and Criterion of Long-Run ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Information redundancy in fuzzy systems Author: Kalaikov, Ivan Genchev; Калайков, Иван Генчев Date: 1999 Abstract: The problem of existing of information redundancy in the fuzzified form of a crisp variable is considered. It it proved that under defined assumptions only part of the bits in the digital form of the crisp, measurement are sufficient for extraction of the membership degree and the labels of the fired fuzzy sets. Then less bits in the binary ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Управляемост и наблюдаемост на нелинейни системи : методът на диференциалната геометрия Author: Перев, Камен Лазаров; Иванова, Мариола Найденова; Perev, Kamen Lazarov; Ivanova, Mariola Naydenova Date: 1999 Abstract: This paper considers the problem of controllability and observability of a class nonlinear systems. A short introduction to the theory of differential geometry is presented. In the differential geometric framework is given the system description, which is nonlinear in state but linear with respect to input signals. The similarities and ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Condition and error estimates in the numerical solution of matrix equations in control theory Author: Petkov, Petko; Konstantinov, Mihail; Christov, Nicolai; Петков, Петко; Константинов, Михаил; Христов, Николай Date: 1999 Abstract: The condition number and error estimation in the numerical solution of matrix algebraic continuous-time and discrete-time Lyapunov and Riccati equations is considered. The estimates presented involve the solution of triangular Lyapunov equations along with usage of the LAPACK norm estimator. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Децентрализиран подход към спецификация на услугите на интелигентна мрежа Author: Пенчева, Евелина Николова; Pencheva, Evelina Nikolova Date: 1995 Abstract: This paper presents a model of Intelligent Network (IN) services using the decentralized approach to specification of service logic and data at the level of distributed functional plane. This alternative is based on the assumption that the service logic is distributed among the Functional Entities represented as SDL processes, that are ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Централизиран подход към спецификация на услугите на интелигентна мрежа Author: Пенчева, Евелина Николова; Pencheva, Evelina Nikolova Date: 1995 Abstract: The paper presents a model of Intelligent Network (IN) services using the centralized approach to specification of service logic and data at the level of distributed functional Plane. This alternative is based on the assumption that functional entities should not be adapted to different uses in different services. The service logic is ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Изследване на оптичен сензор на промишлен робот Author: Видеков, Валентин Христов; Джамийков, Тодор Стоянов; Videkov, Valentin Hristov Date: 1995 Abstract: A manipulator for industrial robot is treated. On the manipulator it mounted an optical sensor for detection of a semiconductor substrate presence. In the paper IS presented an algorithm and results from the examination of the fuming out diagram of a forward and vertical optical sensor. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Активни стратегии за разпознаване на форми Author: Венков, Пенчо Георгиев; Venkov, Pentcho Georgiev Date: 1999 Abstract: Some general suggestions are involved to outline the implementation of usefull algorithms for edge detection and controur segmentation in the practical vision systems. The model-based approach of analysis is compared against general passive methods of contour extraction and shape recognition. The new approach, proposed in this paper is based ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Градиентен подход за Hough трансформация на праволинейни сегменти в изображения с нива на сиво Author: Каменова, Нина Петрова; Kamenova, Nina Petrova; Венков, Пенчо Георгиев; Venkov, Pentcho Georgiev Date: 1999 Abstract: In this paper is described the developed gradient approach for Hough transform of detecting line segments in grey level images. The main idea of the offered approach consists in definig of edge points in the image, with an Sobel operator and an thresholding detector. Each of this points is mapped in a Hough space in an only one point by ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Анализ на разширеното акумулаторно пространство на Hough за опрделяне на праволинейни контурни сегменти Author: Каменова, Нина Петрова; Венков, Пенчо Георгиев; Kamenova, Nina Petrova; Venkov, Pentcho Georgiev Date: 1999 Abstract: The subject of the current paper is the detection of line segments by analyzing of the information in the expanded Hough space, resulting of the mapping of edge points in the parameter space by the gradient approach. The analysis consist of two stages procedure: in the first stage are detected local extrema by clustering of the neighbouring ... Library:
TECHNICAL UNIVERSITY - SOFIA