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Proceedings of the Technical university of Sofia, 1995 -: Recent submissions

Now showing items 601-620 of 853

Title: Ценообразуване и ефективност на продажбите на леки автомобили Author: Киров, Володя Иванов; Kirov, Volodya Ivanov Date: 1995 Abstract: In the article have been analysed different methods of final price formulating of new car imported. An investigation is given of capital factors having any influence on price calculating. The conditions of car trade efficiency have been formulated. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Проучване на пазара на леки автомобили в България Author: Киров, Володя Иванов; Kirov, Volodya Ivanov Date: 1995 Abstract: The social and politic changes in Bulgaria during the past few years have tended to considerable changes of foreign trade relations including the structure of car import. In this study is made an analysis of number of car sold and a draft of the tendencies for a 3-years period is also given. A conclusion is made about the market presentation ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Критерии за оценка на ефективността на подготовка на авиационната техника за полети Author: Петров, Стефан Атанасов; Petrov, Stefan Atanasov Date: 1995 Abstract: The average tune for flawless work is the basis of number of criteria used for flight preparation of aircraft. Defining it, it is assumed that the main part of failures that occur are unexpected, i.e., the exponential law hypothesis for flawless work is assumed. The analysis of aircraft construction and power plant failures occurring in ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Идентифициране на параметрите на модела при създаване на алгоритъм за оптимално управление на автомобилни двигатели с вътрешно горене Author: Ле Хонг Фъонг; Le Hong Phuong; Симеонов, Емил Цанев; Simeonov, Emil Tsanev Date: 1995 Abstract: The paper presents a recursive method for the on-line identification of the parameters of a dynamic model of an automotive internal combustion engine. The method is useful in setting up an adaptive control system for optimizing engine operation. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Върху някои аспекти на математическото моделиране на двигателите с вътрешно горене Author: Симеонов, Емил Цанев; Ле Хонг Фъонг; Simeonov, Emil Tsanev; Le Hong Phuong Date: 1995 Abstract: Mathematical modelling of complex system like modern internal combustion engines by correlating engine inputs and outputs through regression models can be effected by means of a global function for the entire range of engine torques and speed or by fitting local function to the measurements of the outputs in each separate operating point. ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Резултати от изследването на износването на буталцата на горивонагнетателната помпа Author: То Дък Лонг; To Duc Long Date: 1995 Abstract: The wear patterns of 1015 plungers of varions makes of injection pumps for diesel engines have been investigated. The characteristics wear zones have been aefined. The statistical data provided estimates of the parameters of the distribution functions for the wigth and the length of the different wear zones and their average length, the ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Влияние на износването на помпените елементи върху скоростната характеристика и характеристиката на подаване на горивото на горивонагнетателната помпа Author: Джонев, Георги Борисов; То Дък Лонг; To Duc Long; Dzhonev, Georgi Borisov Date: 1995 Abstract: In this article is made an investigation of the relationship between wear of fuel pressure pump elements and characteristics of diesel engine and fuel injection pump itself A model is proposed for evaluation of variation of fuel injected. It permits to determine the limit of fuel pressure drop down and unusable condition of pump elements. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Разработване на детерминиран математически модел за автомобилно движение през кръстовище, регулирано със светофар Author: Диалло, Мамаду; Diallo, Mamadu Date: 1995 Abstract: In this paper are the results of a study of the motion on vehicless at jonctions and their uniform movement inbetveen jonctions. The model allow the describe of the decomposition of the group of vehicles in the course of time/space and calculate the time of the preliminary switching of the green light for the withdrawal of the vehicles that ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Оптимизиране дефазирането на светлинните сигнали при координирано светлинно сигнално регулиране Author: Ангелов, Ангел Петков; Диалло, Мамаду; Тодоров, Цветан; Angelov, Angel Petkov; Diallo, Mamadu; Tododrov, Tsvetan Date: 1995 Abstract: This article present a mathematical method for optimising the coordinated traffic signals. It takes into account the speeds of each vehicle and the probabilities according to the law of their distribution into separate groups and the distance between the junctions. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Сравнителни харатеристики на производствено–техническата база за поддържане на подвижния състав в предприятията на международния автомобилен транспорт Author: Пенков, Иван Костадинов; Амир, Абдул; Penkov, Ivan Kostadinov; Amir, Abdul Date: 1995 Abstract: The results of an investigation of the condition and the results of the use of the technological equipment and facilities for motor vehicle maintenance in five international road transport companies for a perid of ten years have been analysed. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Влияние на производствено–техническата база за поддържане на подвижния състав върху коефициента на техническата готовност на автотранспортното предприятие Author: Пенков, Иван Костадинов; Стаменов, Иван; Penkov, Ivan Kostadinov; Stamenov, Ivan Date: 1995 Abstract: The paper presents the results of a study of the influence of the level of technological equipment maintenance on the operational readliness index of a transportation company. The influence of the sufficiency of working stalls, specialized of five years in five transportation companies. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Влияние на състава и свойствата на отработените газове от ДВГ върху загубите на енергия при протичането им в елементите на центростремителни турбини на турбокомпресорите Author: Иванов, Владимир Костов; Ivanov, Vladimir Kostov Date: 1995 Abstract: In the paper is done analysis about influence of exhaust gasses's structure and quality on the resistant coefficient when the gasses flow trough the elements of TChT (Turbocharger's Turbine). The type of turbine is radial and the internal combustion engine is diesel (DICE). On the base of experimental dates about flowing the gasses through ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Методика за определяне на загубите при течението на газа в елементите на центростремителна турбина на турбокомпресори Author: Иванов, Владимир Костов; Панчаревски, Георги Date: 1995 Abstract: The paper presents a method for theoretical calculation the losses when thenex-haust gasses from DICE (Diesel Internal Combustion Engine) with supercharging flows through the elements of TChT (Turbocharger's Turbine). The method are tested experimentally on the TChT type "Holset 3LD" mounted on DICE "Perkins 3900"and TChT type "Holset B4A" ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Регулатор с обратно действие за ъгъла на изпреварване на впръскването Author: Калайджиев, Христо Георгиев; Анастасов, Костадин; Kalajdzhiev, Hristo Georgiev; Atanasov, Kostadin Date: 1995 Abstract: The construction and the work of an injection timing device with negative curve are described. A comparision between the serial and the new centrifugal device was made. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Влияние на дизеловата горивна апаратура и горивния процес върху екологичните параметри на двигателя Author: Калайджиев, Христо Георгиев; Цаловски, Христо; Kalajdzhiev, Hristo Georgiev; Tsalovski, Hristo Date: 1995 Abstract: In the paper are given the results from tests of a serial diesel engine and its new modifications. The priorities of the new in the basic speed and load working range are underlined, It was paid attention on working conditions with small speed and no load conditions (idle). Anew curve for automatic change of the dynamic injection timing was suggested. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Изследвания за използване на водорода като моторно гориво Author: Петков, Петко Стоянов; Богословов, Емил; Bogoslovov, Emil; Petkov, Petko Stoyanov Date: 1995 Abstract: A great number of investigations are done on the use of hydrogen for motor oil. Its priorities are not only ecological but it shows high energy indices. A major disadvantage of this kind of fuel oil is the high production cost. Detonation stability of hydrogen-air working matures are studied The combustible process as well as the influence ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Оценка ефективността на системата за автоматично управление на въздушното движение Author: Заяков, Веселин; Маджаров, Борис Иванов; Zayakov, Veseliv; Madzharov, Boris Ivanov Date: 1995 Abstract: The subject of paper is assessment of the automatic system for air traffic control in accordance with criteria of flight safety, effectiveness . of control with definite flow of air traffic intensity and acceptable standards of economical effectiveness. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Организация и структура на авиационното обучение и квалификация в съответствие с европейските норми за лицензиране Author: Маджаров, Борис Иванов; Madzharov, Boris Ivanov Date: 1995 Abstract: The subject of paper is structure of integrated course and qualification modules for aeronautical graduate education and postgraduate qualification in accordance with European Conference of Civil Aviation (ECAC). Organisation and structure of integrated course determine recognition in European region. Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Пракическо обучение на електроинженерите по „Техническо документиране“ Author: Димитрова, Румяна Любомирова; Трифонов, Никола Николов; Lyubomirova, Rumyana Dimitrova; Trifonov, Nicola Nikolov Date: 1995 Abstract: The practical training in discipline 'Technical documentation" jar the students of the Electrotechnical faculty of the Technical University of Sofia is considered. The given individual tasks are analysed. The students work is described — in the process of classes and individually — in consecutively complication and extension of the type and ... Library:
TECHNICAL UNIVERSITY - SOFIA
Title: Производствената практика на студентите като компонента на учебния процес Author: Попова, Юлия Борисова; Popova, Yuliya Borisova Date: 1995 Abstract: The practical activity of the students as immediate participants in the manufacturing process in the industrial enterprises has an unquestionable importance for building up future specialists and to a certain extent it supports the knowledge assimilation lectured in the University. That's why it's necessary that activity to be lawful agreed. ... Library:
TECHNICAL UNIVERSITY - SOFIA