Table of Contents

  • INNOVATIVE SOLUTIONS

    • STRESS AND STRAIN ANALYSIS OF CONNECTION OF PIPES WITH FLAT ENDS

      pg(s) 102-105

      This paper investigates stress state in connection of pipes with flat ends used in pressurized pipelines and steam boiler connections. Flat ends are designed according standard EN 12952-3 and later numerically checked using linear elastic material model. These analyses showed areas with increased stress. Therefore, additional analyses were performed using linear elastic-ideally plastic material. The maximal pressure loads are obtained for series of pipes with flat ends and compared to calculated results according EN 12952-3 norm.

    • A LOAD ADAPTIVE CONTROL SYSTEM OF MANIPULATOR ROBOT’S DRIVE

      pg(s) 106-109

      The control dynamics for the electric drive of manipulation robot (MR) link is considered. Joint-drives in mobility degrees of MR experience the variable loads caused by changes of a spatial configuration of MR in the course of motion, mass and dimensions of the moved payloads, etc. Changes of load can happen over a wide range and cause the essential deterioration in dynamic properties (speed, damping, etc.) of the system of automatic control (SAC) of drive. With the aim to stabilize the desired dynamic properties the algorithm of drive control is proposed which is adaptive to changes of load. The unknown parameters of drive load, necessary to form the adaptive control algorithm, are identified in observing device (OD). The work algorithm of OD to identify the unknown parameters of drive load is proposed. For the proposed control and work of OD algorithms the structural scheme of drive control is construction. The simulation results on computer are proved that in considered SAC of drive the stabilization of desired dynamic properties are ensured.

    • EXPLORATION OF THE RADIOECOLOGICAL STATUS OF THE DRINKING AREA OF VELIKO TARNOVO

      pg(s) 110-112

      The article reviews the environment, radiation transformations and how they affect plants, animals and humans. A theoretical overview of the task is done. Results of measurements of the presence of radioactive isotopes in various non-living and living sites in the region of the main source of water in Veliko Tarnovo – “Yovkovtsi” dam lake and some of the obtained spectrograms are presented.

    • CONSTRUCTIVE DESIGN OF A BELT CONVEYOR FOR A COAL MINE

      pg(s) 113-115

      At the present time, mines, power plants, ports are more complicated and more functional compared to the past therefore raw material processing, production, and amount of transportation material have increased. In this paper it is calculated with using necessary equations with standard charts that a stone cargo construction with 500 t/h in the line which is formed by two conveyors with 500 m straight and 100 m which has 30o slope.

    • FRESHWATER SUPPLY FOR SHIPS DESALINATED BY METHOD OF ELECTRODIALYSIS

      pg(s) 116-118

      For the purpose of freshwater supply for ships, we have explored the desalination process of sea water by electrodialysis. From the analysis of the obtained results, the desalination process of the Black Sea water by electrodialysis has been explored. The average salt content of the Black Sea water is 15-16 g/l, and the global ocean water – 35 g/l, while the salt content in water from the Baltic Sea is 5.77 g/l. The Black Sea water was diluted with fresh water up to a concentration of 5.77 g/l.
      Electrodalysis is the most effective method for desalination of natural waters with low salinity. So, we have taken water equivalent
      to salt water content of the Baltic Sea water. Desalination of this water is effective and requires little energy. To reduce salt content of sea water, the separation was carried out on reverse osmosis membranes with a selectivity of 70%, and then the penetrant was separated by electrodialysis. Every 5 minutes, the solution loses 55.8% of salt. During the treatment (45 min), water is desalinated up to a concentration of 51.2 mg/l, and it can be used for industrial (technical) or household purposes. Calculation have shown that the selectivity of membranes during desalination was 99.11%.
      As a result, on the basis of theoretical and experimental studies of seawater desalination by electrodialysis, there have been developed the principal circuits of the system of environmental safety of ballast water and water treatment facilities in the port, for environmental safety of ballast water and for obtaining industrial water.

    • EXPEDIENCY OF USING MULTIFUNCTIONAL GAS DISTRIBUTION STATIONS IN TRANSPORT INFRASTRUCTURE

      pg(s) 119-120

      The article is discussing the possible options for the implementation of potential energy, which is contained in the gas pipeline in the form of pressure, which is actually lost when the gas is reduced at the GDS. Improving energy efficiency is a major challenge for Bulgaria’s economic development. The extensive development of Bulgaria’s gas pipeline network and the increase in the level of gasification also increases the energy that is actually released into the atmosphere. Are considered various options for the implementation of overpressure for the purpose of increasing energy efficiency, the realization of which will not only improve the efficiency of the construction of the distribution network of gas pipelines, but also will partially solve the problem of the widespread introduction of road transport on electricity and liquefied gas.

    • CHOOSING APPROPRIATE MACHINERY FOR REDUCED TILLAGE

      pg(s) 121-125

      The paper discusses the gradual transition from conventional tillage through reduced tillage to no-tillage while creating favourable conditions for increase of organic matter. The paper suggests crop and tillage method rotation for a period of five years in order to facilitate this transition. It also reviews tests of soil physical properties which can help farmers determine how their soils are changing and what effect the change of tillage method has on them.

  • THEORETICAL PROBLEMS IN INNOVATIONS

    • INNOVATIVE APPROACH TO THE DEVELOPMENT OF AUTOMATED LOGISTICS INFORMATION SYSTEMS

      pg(s) 89-91

      Technological advancement driven by innovation, fundamentally new industrial technologies and artificial intelligence, will naturally exert greater pressure not only on the growth of production but also on its structural properties which are expected to undergo significant changes. Moreover, the improvement of technological, auxiliary and information activities will invariably be regarded as a crucial factor in the development of modern production. Thus, with the structural transformation having been effected, the new communication and information achievements are more likely to reinforce the relationship of production with its external logistics components. In addition, it should be borne in mind that the production of the future will be constructed as a complete whole comprising the respective technical, technological and information processes along with the functionally integrated production components, including those of the logistics system. The purpose of the present paper is to explore the possibilities for designing automated logistics information systems and to propose an innovative approach incorporating not only the specific in-house (intra-company) logistics but also considering its interdependent relationship with the other logistics processes that have been excluded from the company’s core business activities.

    • DISTINCTIVE FEATURES OF “SCIENCE-INTENSIVE PRODUCTS” AS INNOVATIVE WITH ESPECIALLY HIGH PROPERTIES

      pg(s) 92-94

      In this article the author grouped the main types of science-intensive products in the following types: precision alloys – soft magnetic with special physical properties, special electrotechnical alloys, deformable magnetic-hard materials, alloys with a specified temperature coefficient of linear expansion, alloys with specified elastic properties, alloys with high electrical resistance; special corrosionresistant steels and alloys, special heat-resistant and high-temperature alloys by different characteristics.

  • INNOVATION POLICY AND INNOVATION MANAGEMENT

    • EVOLUTION OF RESEARCH AND DEVELOPMENT CENTER FOR REGIONAL DEVELOPMENT: CASE STUDY OF MAKU R&D CENTER

      pg(s) 95-97

      The role of universities in R&D activities is a subject which needs to be reevaluated and thought over in terms of their contribution to the related industries, their vicinities and research parks. The mere reason of the existence of universities is to push the boundaries of the existing knowledge to achieve better and more reliable results in any given field. Although the ideal is having universities which are able to adapt really quickly to changes, often the reality is not so. The change is mostly slow and not swift enough to keep up with the recent developments in many fields such as the economic changes. These changes in the manner of universities require long periods of time. This is one of the reasons why universities should be quick to respond to regional needs and shifts to help pursue more attainable and resilient ecosystems. The main objective of this article is to analyze the role of research and development unit Mehmet Akif Ersoy University R&D services. It aims to support co-evolution of local municipal and industrial enterprises to increase the competitiveness of the region.

    • DESIGN METHODOLOGY MANAGEMENT SYSTEMS KNOWLEDGE OF BUSINESS PROCESSES IN MANUFACTURING

      pg(s) 98-101

      It is proved that in the knowledge economy, such assets of the company, like knowledge, are of particular value. New knowledge can increase the individual income of the owners as they apply in business processes and production activities. Defined knowledge management as the process of formation of the intellectual assets of the enterprise. Selected technological, motivational and organizational components of the system of knowledge management. The system methodology of knowledge management are methods to transform individual pieces of information in knowledge relating to a particular sphere of activity. System design of knowledge management of the enterprise is divided into a number of stages, which are discussed in the article. The analysis of world experience of the practical implementation of knowledge management has shown that organizations and businesses take this purpose a variety of techniques and methods. Found out that currently there are three schools of knowledge management. The methodology for the integration of knowledge in the enterprise, which is presented in the form of a diagram. The knowledge creation enterprise is carried out ways: through self-education personnel; by performing duties; tools of knowledge management. Proposed projects for the knowledge management implement in stages and characteristics of each stage. It is proved that the culture of designing the system of knowledge management should include management strategies, planning and provide for close cooperation and distribution of powers. It is concluded that knowledge management helps businesses become more competitive, reduce costs, increase the speed of making management decisions and efficiently identify the needs of consumers. The main purpose of the system of knowledge management of the enterprise is knowledge management an integral part of the work of all employees.