Заглавие:Евpиcтични методи в обучението по техническите дисциплини
Автор:Колева, Нели Любенова; Koleva, Nelly LubenovaДата:1995Резюме:Teaching always needs variety and quality. Qualitative new teaching methods have been elaborated as for that purpose, being based on a flexible balance between academic and pragmatic type of knowledge and both standard and not standard skills for problematic situations resolving. A didactic technological module has been drawn and motivated ...Библиотека:
Заглавие:Особености на кристализацията в заваръчната вана
Автор:Ямболиев, Тeофил Ангелов; lamboliev, Theofil AngelovДата:1995Резюме:The influence of the G ГА welding parameters on the weld pool solidification of an Al- alloy is investigated. 5 types of solidification structure can be distinguished. UTS as high as 94-99% and elongation 89% compared with these of the base metal performs the stray-axial grain structure. Nucleous availability is necessary condition for ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Автоматизирано определяне на последователността на заваряване при изработване на конструкции
Автор:Лафчиев, Георги Борисов; Lafchiev, Georgi Вorisov; Ямболиев, Теофил Ангелов; Iamboliev, Teofil AngelovДата:1995Резюме:Multiple factors influence the welding sequence. Therefore , its specification is both labour and time consuming, especially in case of heavy or sophisticated weld structures. An algorithms for a welding sequence specification was developed which contributes to an increase of the technological design productivity and minimizes the operator ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Нов метод за пресмятане на силата на триене в направляващите на металорежещи машини
Автор:Мишев, Георги; Mishev, GeorgiДата:1995Резюме:The friction in (he sliding guide ways of the machine tools is an essential parameter deforming the static and dynamic behavior of the straight-forward moving machine elements-slides and tables. The objective of (his paper is to introduce a new method for estimation of (he friction force in (he sliding guide ways of (he machine tools ...Библиотека:
Заглавие:Компютърна програма за подготовка и симулиране на обучението по електродъгово заваряване
Автор:Раевска, Снежана; Raevska, SnejanaДата:1995Резюме:Computer multimedia systems poses some qualities for education encluding the technical objects, too. In the current publication we inform for some attempt of creation of such multimedia program for the purposes of the part of laboratories on Welding technology for the students of Manufacturing engineering " in the Technical University of ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Изследване на механичните характеристики на предварително напрегнати влакнесто-композиционни материали
Автор:Маринов, Валери; Marinov, Valery; Левичаров, Георги; Levitcharov, GeorgeДата:1995Резюме:Experimental results of the initial research work on new class composite materials with prestressed fibers are presented. Experiments with fiber reinforced plastics with glass fibers and epoxy resin matrix are carried out. The tensile and flexural strengths are investigated for specimens with different rate of prestress. The experimental ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Моделиране по метода на крайните елементи на образуването на наслойка при правоъгълно рязане на алуминий
Автор:Маринов, Валери; Marinov, ValeryДата:1995Резюме:A thermo-viscoplastic finite element model is presented to simulate metal flow, temperature and plastic deformation in the vicinity of the cutting edge when machining aluminum with HSS tool. The mechanical and thermal properties of the work material are accepted to depend on the cutting temperature. On the basis of the Von Mises criterion ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Относно проектировъчнотодинамично изчисление на автомобила
Автор:Козарев, Георги Йорданов; Kozarev, Georgi Yordanov; Нейков, Светозар Ангелов; Neikov, Svetozar AngelovДата:1995Резюме:The paper discuss the value of some parameters concerning the process of dynamical design computation for the vehicle. As a result of computer analisys of some statical data the autors propose more precise values for some parameters as well as some empirical relations between:
- the mass of the paying load the permanent mass of the ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Технология за производство на стъклопластова локомотивна антена
Автор:Раденков, Филип Димитров; Radenkov, Philip Dimitrov; Диков, Валентин Каменов; Dikov, Valentin Kamenov; Анастасов, Милчо Георгиев; Anastasov, Milcho GeorgievДата:1995Резюме:The locomotive antenna is used in the automatic railways transport control and it is mounted under the locomotive. Besides the radiolucency it must be resistant to vibrations, impacts and environmental aggressive media.
Thia equipment was elaborated and was practically realized by original technology of ULTrNM* and TIATS-BDJ. A glass-reinforced ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Легиране на поликапроамид с модифициран бентонит
Автор:Диков, Валентин Каменов; Dikov, Valentin Kamenov; Анастасов, Милчо Георгиев; Anastasov, Milcho GeorgievДата:1995Резюме:The thermoplastic polymers modified by elastomers show improved impact resistance but deteriorated static mechanical characteristics.
The aim of the present work Is to better the general mechanical properties of polycaproamide by involving small amounts of elastomer immobilized on dispersed filler.Poly(butadiene-co-styrene) latex particles ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Пресмятане на зъбни колела от вискозоеластични материали
Автор:Сгурева, Иванка Николаева; Sgureva, Ivanka Nikolaeva; Христова, Евелина Любчова; Hristova, Evelina LyubchovaДата:1995Резюме:Methods for calculating of polymeric materials gears,based on the hereditary theory of viscoelasticity has been developed. In the formulas for calculating of the contact strength and deformation of the gears,all the functions of elastic constants are replaced by corresponding operators.
The methods has been applied for calculating of ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Пресмятане на гъвкави тръбопроводи от полимерни материали
Автор:Сгурева, Иванка Николаева; Sgureva, Ivanka Nikolaeva; Христова, Евелина Любчова; Hristova, Evelina LyubchovaДата:1995Резюме:Methods for calculating of flexible pipelines made of visco-elastic materials,based on the elastic solution for flexible fibers,has been proposed.The following cases have been considered handing up on the same or different levels with small and big slacks.The results have been compared with those,obtained from the evaluations for thick-walled ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Изследване на новосинтезирани съединения като стабилизатори за LLDX - композиции
Автор:Аламинов, Александър Христов; Alaminov, Alexander Hristov; Албадауи, Вержиния Петрова; Albadaoui, Verginia Petrova; Маринова, Атанасия Тодорова; Marinova, Atanasia TodorovaДата:1995Резюме:Newly synthesized adducts of cyanuric acid, melamine and o-phosphoric acid have been studied. The static thermal stability and the kinetic of destruction have been determined in samples using thermogravimetric analysis. It was found that the additives, containing barium.zinc and cadmium in concentrations up to 3 vol % rize thermal stability ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Радиационна модификация на изолационни поливинилхлоридни композиции
Автор:Маринова, Атанасия Тодорова; Marinova, Atanasia Todorova; Аламинов, Александър Христов; Alaminov, Alexander Hristov; Албадауи, Вержиния Петрова; Albadaoui, Verginia PetrovaДата:1995Резюме:Radiation-chemical modification of polymers is a present-day method for receiving electro insulating materials with enhanced operating properties and low prime cost Modification of model and industrial insulating PVC-compositions has been carried out using ionizing radiations - y - radiation “Co and radiation with accelerated electrons in ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Брикетиране на дървесно-лигнинови смеси за пречистване на утайки от ПСОВ, използувани при компостиране
Автор:Камбуров, Валентин Вълков; Kambourov, Valentin Valkov; Маринова, Светла Гарванска; Marinova, Svеtla Garvanska; ДимитроВа, Виолета Димитрова; Dimitrova, Violeta Dimitrova; Романски, Иван Генчев; Romansky, Ivan GenchevДата:1995Резюме:Composting is a cost effective and environmentally sound alternative for stabilization of a domestic waste water sludge. By possible utilization of those product in agriculture a sludge organic matter and nutrients could be recycled. A typical composting components are dewatered sludge mixed to a bulking agents consist of wood chips, straw, ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Зони на разпространение на атмосферни замърсители при бензиностанции със системи за възстановяване на бензинови изпарения
Автор:Романски, Иван Генчев; Romansky, Ivan Genchev; Камбуров, Валентин Вълков; Kambourov, Valentin Valkov; Цанков, Любен Иванов; Tzankov, Lyuben Ivanov; Шипчанова, Ирена Александрова; Shipchanova, Irena AlexandrovaДата:1995Резюме:Air pollution within an area of petrol stations during filling of the station and cars is a problem for solving not only by petrol distribution companies but also by regional inspectorates of environment. A limitation of petrol vapors is connected to better air quality near to the station and fuel saving. On this way are also restricted ...Библиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Размишления върху компютърния анализ и синтез на динамични модели с половин степен на свобода
Автор:Стоев, Теодоси Манолов; Stoev, Teodosi ManolovДата:1995Резюме:Разгледани са динамични модели за приведени сили зависещи от положението и скоростта.Направен е анализ на известни и нови приблизителни методи.Показани са графики, получени от компютърен синтезБиблиотека:
TECHNICAL UNIVERSITY - SOFIA
Заглавие:Синтез на коляно-мотовилков механизъм при строги изисквания за скорост и ускорение на изпълнителното звено
Автор:Гарабитов, Стефан Ангелов; Garabitov, Stephan Angelov; Христов, Веселин; Christov, VeselinДата:1995Резюме:The case we are considering is an evahiation of the traditional method for
synthesis of the crank mechanism with requirements about displacement, velocity and acceleration of the actuating link. With already definite parameters of the mechanism exact law of motion of the guide link is defined giving the velocity and acceleration of the ...Библиотека: