Recently added

TECHNICAL UNIVERSITY - SOFIA: Recent submissions

Now showing items 581-600 of 944

Title: Обектно – ориентиран подход за извличане на речеви параметри Author: Атанасов, Венцислав Борисов; Момчеджиков, Михаил Благоев; Momchedzhikov, Mihail Blagoev; Atanassov, Ventsislav Borissov Date: 1995 Abstract: The object-oriented approach for the implementation of an experimental system for extraction of acoustic speech parameters is discussed in the article. The article stresses the building of hierarchy of classes which serve the software system, as superstructure of standard defined classes of Object Windows library (OWL) and ClassLib in the ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Сравнителен анализ на някои методи за защита на говорна информация Author: Момчеджиков, Михаил Благоев; Ле Хай Чау; Чобански, Валентин Н.; Momchedzhikov, Mihail Blagoev; Le Hay Chau Date: 1995 Abstract: Cryptography is essential for the reliability of the radio connection. Ciphering aims at choosing a technology that will provide the desired reliability of deciphering A comparative analysis of some methods for ciphering speech information is proposed in the article. The criteria for comparing the methods are based on cryptoanalysis, ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Изследване на признаците за разпознаване на текст на монголски език Author: Бекярски, Александър Богданов; Осорин, Л.; Bekyarski, Alexandar Bogdanov; Osorin, L. Date: 1995 Abstract: Recognition of letters in mongolian alphabet is a problem the solving of which is very important for more wide applications of national alphabet in Mongolia. The mongolian letters consist of some basic figures (primares) elements. Therefor first must be made the recognition of these basic elements in mongolian words. It is proposed in this ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Алторитъм за анализ на портретни изображения с помощта на невронни мрежи с обратно разпространение на грешките / Румен Кунчев, Димитър Атанасов. (Комуникации). // Годишник на ТУ-София, Том 48, 1995, № 4. Електроника, комуникации, информатика, автоматика : Юбилейна научна сесия „50 години ТУ–София“ 11-12.10.1995 София, с. 111-118 Author: Кунчев, Румен Кирилов; Атанасов, Димитър; Kunchev, Rumen Kirilov; Atanasov, Dimitar Date: 1995 Abstract: In this paper is presented a two-stage algorithm for location of geometric visual features in human faces. The first stage generates search regions for centers of eyes and mouth from coarse-resolution image. The second stage. uses those search regions to select 12 features inside the high-resolution image data: left, right corners, top, ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Критерии за определяне зоната на действие на интермодулационните смущения при въздухоплавателните служби Author: Додов, Никола Иванов; Панков, Борислав; Dodov, Nikola Ivanov; Pankov, Borislav Date: 1995 Abstract: The present and future development of the FM sound-broadcasting networks in our country can lead to unacceptable interferences with the navigation and communication radio equipment of aeronautical services. Two kinds of interferences - these resulting from intermodulation products caused by different radio transmitters operating on common ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Gate delay model of pass - transistor logic Author: Chumachenko, Vasiliy Platonovich; Vasileva, Tanichka Krumova; Чумаченко, Василий Платонович; Василева, Таничка Крумова Date: 1995 Abstract: A simple gate delay model useful for analysis and optimization of pass-transistor logic circuit is proposed. The macromodel is based on device equation and is found to be an analytical function of capacitive. load and device sizes. Curve fitting of model equation to SPICE simulation results is used for coefficient obtaining. The procedure ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Бърз алгоритъм за определяне разпределението на параметрите на комуникационни устройства и системи Author: Ненов, Георги Димитров; Nenov, Georgi Dimitrov; Лишков, Славчо Димитров; Lishkov, Slavcho Dimitrov Date: 1995 Abstract: In this paper we introduce a fast algorithm for estimation of the distribution of output parameters of communication systems and devices. For this purpose a fraction factorization experiment is used. A decimation in observation time is achived and representativness of the data record is ensured. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Компютърни радиомрежи за дистанционен контрол и управление Author: Алтимирски, Емил Савов; Altimirski, Emil Savov Date: 1995 Abstract: The paper provides information about the scientific investigations and applications in the field of computer radionetworks for remote monitoring and control of more than 2000 distant objects in electrical supply, water supply, environment protection, hydrometeorogical service, security systems, military service etc. The design and application ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Точностни характеристики на радиометричния екологичен мониторинг в инфрачервения обхват Author: Фердинандов, Ервин Стефанов; Ferdinandov, Ervin Stefanov Date: 1995 Abstract: The communication channel of a radiometric system for receiving, transmitting and processing of temperature distribution data of earth and water surfaces has been analysed of the needs of remote ecological monitoring in the infrared spectral range. Expressions have been derived for the signal - to - noise ratio and measurement resolution. ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Възможности за повишаване ефективността на силициев фотоелемент Author: Витанов, Петко Костадинов; Vitanov, Petko Kostadinov; Тютюнджиев, Николай Христов; Tyutyundzhiev, Nikolay Hristov; Каменова, Марийка Тодорова; Kamenova, Mariyka Todorova; Делибашева, Мария Христова; Delibasheva, Mariya Hristova Date: 1995 Abstract: On the top n+ — region of the standard n+p solar cell used in the experiment was formed thin porous silicon (PS) layer. The photovoltaic properties of two identical samples with and without porous silicon are compared. The tested structures are measured under solar simulated light of 100 mW/cm2. It was observed that the short circuit current ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Възможности за добив на електрическа енергия с фотоволтаичен модул при реални условия за България Author: Витанов, Петко Костадинов; Тютюнджиев, Николай Христов; Пенева, Мила Димитрова; Vitanov, Petko Kostadinov; Tyutyundzhiev, Nikolay Hristov; Peneva, Mila Dimitrova Date: 1995 Abstract: This paper analyses the performance of a 36 W photovoltaic module, created on the basis of 36 connected in series 4" monocrystalline silicon solar cells. The dependence of generated energy upon solar radiation and the position of the module is represented and the module thermal behavior as well. The amount of electrical energy, produced for ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Система за експериментален аудиокардиоанализ Author: Гълъбов, Васил Тотев; Galabov, Vasi Totev Date: 1995 Abstract: The developed system is based on the conventional methods of auscultation and phonocardiographia using the facilities of the computer technique. The final aim of the project is the building of a screening analysator with simplified manipulation. In the paper are discussed the development of the experimental set-up, the methods applied for ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Чувствителен към влага микроелектронен сензор Author: Ръсовска, Милка Маркова; Хлебаров, Здравко Петков; Радева, Мила Радославова; Hlebarov, Zdravko Petkov; Radeva, Mila Radoslavova; Rasovska, Milka Markova Date: 1995 Abstract: There are presented the construction and technical futures of a microelectronic humidity sensor, based on the multyplayered structure Al-(Zn-Cu) O-(In-Sn) O-AL The layers was qualified by X-ray analysis and so the technology was adjusted Some of the parameters of the samples was studied — the DC resistance Rdc and the AC resistance Rac was ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Двутактна обемна СЗП с повишена зарядна способност Author: Хинков, Валентин Цачев; Атанасов, Александър Стефанов; Hinkov, Valentin Tsachev; Atanasov, Alexandar Stefanov Date: 1995 Abstract: A new two phase BCCD (bulk CCD/ charge coupled devices with increased - charge handling capability has been proposed in the work on the basis of comparative analysis of two well known BCCD. Treatment of this problem Is actual, since charge handling capability of BCCD is very small, that's why its increasing leads to greater output signal, ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: RLC филтър на променливо напрежение (ШИМ) Author: Табаков, Стефан Евтимов; Горанов, Петър; Салах, Айед Бен Date: 1995 Abstract: This paper treats the analysis of the RCL - Filter in the output of a PWM inverter under low and high Frequency of modulation. The Correcting elements used in the Filter branch improves the quality of the output signal for constant and variable load. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Multiplier design migration from FPGA to standard cell technology Author: Vasileva, Tanichka Krumova; Василева, Таничка Крумова; Tchumatchenko, Vasiliy Platonovich; Чумаченко, Платонович Василий Date: 1995 Abstract: Standard Cell implementation of an 0(n) parallel multiplier with bit-sequential input and output, using Field Programmable Gate Arrays (FPGA) design as a prototype is considered. Problems facing in design migration from FPGA to standard cells design approach are discussed. Applying logic circuit optimization as a manner to improve design ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Компенсация на влиянието на коефициента на усилване по напрежение на операционния усилвател върху предавателната функция на SC – усилвател/атенюатор Author: Радев, Николай Асенов; Radev, Nikolay Asenov Date: 1995 Abstract: A switched-capacitor amplifier/attenuator is considered. It is based on the use of simple and fast operational amplifier (op amp) with low but precisely controlled DCgain nominal value. The effect of the precisely known and by (with small variation) op amp DC gain can be compensated for in the design phase by changing some of the capacitor ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Интегриране на измерването и автоматизираното проектиране в електрониката Author: Стоянов, Иван Илиев; Шойкова, Елена Дикова; Христов, Марин Христов; Stoyanov, Ivan Iliev; Shoikova, Elena Dikova; Hristov, Marin Hristov Date: 1995 Abstract: The paper considers the major related to the actual implementation cf interconnections between CAD and automated measurements for electronic components, circuits and devices. Structures are proposed for cornputer integrated environments where the methodology of testing already implemented prototypes is coherent with the methodology of their ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Числено модиелиране на двуфазни неизометрични турбулентни струи. Интегрален метод на изследване Author: Антонов, Иван Славейков; Лиен, Х. Д.; Нам, Н. Т.; Antonov, Ivan Slaveykov; Lien, H. D.; Nam, N. T. Date: 1995 Abstract: On the basis of integral method has been imitated distribution Two phase Unisothermal turbulent jet. Using "two fluid" scheme of the stream, which means velocity environments of two phases, Boundary layer of Velocity, Concentration of particle and Temperature are Memo. The solution is done with Numerical calculation. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Моделиране движението на полидисперсни смеси Author: Антонов, Иван Славейков; Antonov, Ivan Slaveykov Date: 1995 Abstract: Using Mathematical Model for the Motion of Multy-phase Mixture and in case of Two-phase Flow, carrying solid fraction with different dimension. For each phase has been • supposed as separated Fluid environment with their of initial Concentration and Diametre of particles. Using Kg - Kp - E model and Method of Direkt Numerical Integral ... Library:
TECHNICAL UNIVERSITY - SOFIA