• TRANSPORT. SAFETY AND ECOLOGY. LOGISTICS AND MANAGEMENT

    Three-dimensional structure of transport hub in urban environment

    Trans Motauto World, Vol. 6 (2021), Issue 1, pg(s) 11-12

    Transport is the backbone of any city. With its help, links are established between urban areas and the suburbs, as well as social interconnection is carried out. The hub makes it easy to transfer between different routes and types of public transport. The article discusses the classical classification of the tree-dimensional structures of transport hubs, as well as a new extended classification.

  • Transport and environment: Need for sustainable solutions

    Trans Motauto World, Vol. 4 (2019), Issue 1, pg(s) 24-27

    Transport has irrepressible contribution for the effective development of economy and society. But, these contributions are exceeded by harmful environmental consequences that transport growth causes especially in urban areas. Air pollution, acid rain, noise, climate change are just few of the problems which every urban area is dealing with. Hence, it is very important to provide development of the transport that at the same time could increase its sustainability and minimize environmental degradation. Numerous sustainable transport solutions are available with a potential to decrease these negative influences and promote mobility with higher sustainability. This paper presents a review of sustainable solutions, successfully applied in practice, as guidance for those urban areas that are dealing with the environmental problems from transport, but still are a step behind in undertaking activities.

  • TRANSPORT. SAFETY AND ECOLOGY. LOGISTICS AND MANAGEMENT

    APPLICATION OF THE THEORY OF INVARIANCE FOR NOISE-RESISTANCE ESTIMATION OF TRANSPORTATION INFORMATION SYSTEMS

    Trans Motauto World, Vol. 3 (2018), Issue 2, pg(s) 70-73

    In the present paper is defined the functional stability of the communication systems for radio connection in the railway transport. It is associated with the possibilities for the realization of the principles of invariance within signal – noise environment altering itself.

  • TECHNOLOGIES

    TRAFIC INDICATORS IN CONTEXT OF SUSTAINABLE TRANSPORT DEVELOPMENT

    Machines. Technologies. Materials., Vol. 12 (2018), Issue 4, pg(s) 175-177

    Sustainable transport, as one of the areas on which sustainable development should be founded, depends more and more on introduction of electric vehicles in daily traffic. This paper describes part of the results of wider research related to the analysis of all sustainable transport indicators. Since introduction of electric vehicles is supposed to be done stage by stage in the actual transport, deep understanding of its main parameters/indicators is a prerequisite for reliable analysis. The paper identifies traffic and vehicle structure parameters and rang them in hierarchic order. This structure can serve as substructure in more complex structure of all transport parameters in wider researches.

  • SOCIETY

    AN APPROACH TOWARDS PLANNING OF ELECTRIC VEHICLES CHARGING INFRASTRUCTURE BASED ON VEHICLE AND TRANSPORT STRUCTURE

    Science. Business. Society., Vol. 1 (2016), Issue 6, pg(s) 31-35

    Electrical vehicles are in a new phase of development and utilisation. It has been a long time before such initiatives have taken place. In the meantime the transport as a whole (vehicles, roads, traffic, etc.) has been significantly changed. As expected the main role in this process globally, and regionally is taken by the biggest economies and companies. Besides the environmental priorities, the nature of transport which does not recognise borders enforces smaller economies and countries to adopt their policies in this area, and take chances of the development. This seems to be very complex process with number of challenges. Some of them are very specific for different countries, and it is up to the local researchers to recognize and deal with them. This paper addresses the problem of the infrastructure, i.e. developing of a network of charging stations. Since there are number of specific technical aspects accompanying electric vehicles (types of vehicles, range, charging limitations, price, etc.), the research has started with analysis of the vehicle fleet, road network, and intensity of the traffic in different areas of Republic of Macedonia. This picture is compared with technical characteristics of emerging electric vehicles on the market. That was the way to recognize advantages and disadvantages of use of electric vehicles as substitution of some of the vehicles in the actual fleet. Possible development of use of electric vehicles in the country had to be estimated based on foreign experiences, and such policies in the country. As a result an approach towards development of network of charging stations in Republic of Macedonia has been defined. There is an obvious need this view to be widely presented and discussed with a possible outcome to serve as contribution to the challenges similar countries will face soon.

  • COMPARISON OF CHARACTERISTICS OF SPARK PLUG ENGINES FSI, TSI/TFSI TYPE OF VOLKSWAGEN COMPANY

    Machines. Technologies. Materials., Vol. 9 (2015), Issue 8, pg(s) 32-34

    The use of direct injection in spark ignition engines, significantly facilitated the use of chargers in these engines. This resulted lately in the significant popularization of direct injection engines, initially freely sucking and in final result turbocharged. The greatest popularity on the market gained engines of Volkswagen company, named FSI and TFSI / TSI. Application of Common Rail systems allowed not only to improve the characteristics of the engine by increasing the accuracy in dispensing fuel into individual cylinders. The most important gain is the possibility of second injection of the fuel to the cylinder after the intake valve is closed. On the one hand it allows better control of the load in the cylinder, at first with the piston crown, and now with shaping the injection by the injector.

  • INTEGRATED TECHNOLOGY AND MULTIMODULE TRACKED VEHICLES UNIT FOR WETLANDS PROTECTION

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 8, pg(s) 47-50

    Integrated technology and new generation of multimodule tracked vehicles unit was designed by PIMR- Industrial Institute of Agricultural Engineering in Poznan within the research project WND-POIG.01.03.01-00-164/09. The Tracked Vehicles Unit (TVU) was built as a part of cooperation with Polish firm Hydromega. TVU is dedicated to work on wetlands and should have positive impact on ecology and better environment protection thanks to use of biodegradable oils and lubricants, diesel engine with Stage III emission standard, innovative tracks which have different internal and external speeds during turns. A single-phase technology is designed for harvesting/collecting and transporting biomass (reeds, grass, bushes, small trees) on wetlands, especially these that are located in National Parks and Nature 2000 areas. The TVU is designed to work with different tool modules for cutting, shredding and transporting collected biomass on wetlands. Amphibian type of the TVU’s hulls allows for work in inlands water (rivers, lakes, canals).

  • INTEGRATED TECHNOLOGY AND MULTIMODULE TRACKED VEHICLES UNIT FOR WETLANDS PROTECTION

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 6, pg(s) 37-40

    Integrated technology and new generation of multimodule tracked vehicles unit was designed by PIMR- Industrial Institute of Agricultural Engineering in Poznan within the research project WND-POIG.01.03.01-00-164/09. The Tracked Vehicles Unit (TVU) was built as a part of cooperation with Polish firm Hydromega. TVU is dedicated to work on wetlands and should have positive impact on ecology and better environment protection thanks to use of biodegradable oils and lubricants, diesel engine with Stage III emission standard, innovative tracks which have different internal and external speeds during turns. A single-phase technology is designed for harvesting/collecting and transporting biomass (reeds, grass, bushes, small trees) on wetlands, especially these that are located in National Parks and Nature 2000 areas. The TVU is designed to work with different tool modules for cutting, shredding and transporting collected biomass on wetlands. Amphibian type of the TVU’s hulls allows for work in inlands water (rivers, lakes, canals).

  • NATURE, TOPICAL ISSUES AND GUIDELINES TOWARDS RESEARCH OF FUNCTIONAL RELIABILITY OF TRANSPORT SYSTEMS

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 6, pg(s) 13-15

    One of the most important characteristics of transport systems is the reliability of their performance. Significant global efforts are being made in this direction, both by the relevant government structures, and individual transport operators. These efforts are justified because improvements in the sphere of safety and reliability entail considerable benefits to transport users (reducing the waiting time of passengers, improving the quality of service in general, increasing supply chains reliability level, etc.) and for operators offering such a service (higher level of competitiveness, more revenues, etc.). This article examines the nature, existing problems and opportunities for improvement of approaches and methods of analysis, evaluation and management of exploitation reliability (and respectively transport service quality) of transport systems.

  • PROCEDURE FOR THE SEPARATION SEQUENCE OF VERTICES IN DIFERENT ROUTES

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 6, pg(s) 9-12

    The objective of vehicle routing problem (VRP) is to deliver a set of customers with known demands on minimum-cost routes originating and terminating at the same depot. Similar to most GA that a chromosome S is a permutation of n positive integers, such that each integer is corresponding to a customer without trip delimiters. Christian Prins proposed an optimal splitting procedure to get the best solution, respecting to a given chromosome. In this paper, application of this splitting procedure to get the best solution, respecting to a sequence of vertices, produced by the heuristic approaches(or a new chromosome produced by the mutation procedure), is considered.

  • STUDY AND COMPARATIVE ANALYSIS OF THE MODELS FOR TRAFFIC SAFETY PREDICTION

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 5, pg(s) 33-36

    The need of development and implementation of effective measures to increase the level of traffic safety is of utmost importance when it comes to road transport. Numerous studies on factors affecting road safety are the core of transport approaches and models made to reduce the occurrence of accidents. The purpose of this article is to make a comprehensive study of the models for analysis of the traffic conditions and their impact on traffic safety and to define the fundamental ones for implementation in Bulgarian conditions.

  • МАТЕМАТИЧЕСКИ МОДЕЛ ЗА ОПТИМИЗИРАНЕ РАБОТАТА НА ОБСЛУЖВАЩИТЕ МАШИНИ ПРИ ПРИБИРАНЕ НА ПРОДУКЦИЯТА

    Mechanization in agriculture & Conserving of the resources, Vol. 59 (2013), Issue 6, pg(s) 11-14

    Производствените процеси в растениевъдството се осъществяват при взаимодействието между организационно свързани съвкупности от мобилни, стационарни и обслужващи единици. Ефективното използуване на скъпоструващата и високопроизводителна прибираща техника е пряко свързано със синхронизацията на работата им .

    В разработката е предложен математически модел за оптимизиране на взаимодействието между производсвените и обслужващите машини в съвместната им работа при прибиране на зърнено-житни култури.

    За оптимизация на съотношението между основните и обслужващи машини е използван критерият минимум на загубите от престои.