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Processing of data collected by unmanned aerial photogrammetry systems 处理由无人驾驶航空摄影测量系统收集的数据
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2206683s
Vujadin Stanojković, Saša Bakrač, Dejan R. Đorđević, Valentina Radonjić
{"title":"Processing of data collected by unmanned aerial photogrammetry systems","authors":"Vujadin Stanojković, Saša Bakrač, Dejan R. Đorđević, Valentina Radonjić","doi":"10.5937/tehnika2206683s","DOIUrl":"https://doi.org/10.5937/tehnika2206683s","url":null,"abstract":"The paper describes the method of application of the platform for processing and managing spatial data collected by drones, as unmanned aerial photogrammetry systems. Software support for data processing and management, as well as model generation for photogrammetry purposes, is provided using the Agisoft Metashape software as an example. The data used for processing is related to the recording of the primary military standard for large lengths and angles, which is located in Kovin. The filming was carried out by a WingtraOne drone. The results of the work confirm the quality of the collected-recorded and processed-output data. The research confirmed the fact that the WingtraOne unmanned aerial photogrammetry system can be a good solution for collecting spatial data and creating some geotopographical materials for the needs of the Military Geographical Institute -\"General Stevan Bošković\".","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71132405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Trip rates of different types of obects in the urban environment 城市环境中不同类型物体的出行率
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2206741i
Nikola Ilić, Vladimir Đorić
{"title":"Trip rates of different types of obects in the urban environment","authors":"Nikola Ilić, Vladimir Đorić","doi":"10.5937/tehnika2206741i","DOIUrl":"https://doi.org/10.5937/tehnika2206741i","url":null,"abstract":"The paper presents the methodology and results of research on the basic characteristics of movement and generated traffic of different land purposes in the city of Loznica. By determining the basic travel characteristics for each selected zone and forming an adequate set of independent parameters for the calculation of rates. The goal is to establish links between land use and generated traffic. Based on foreign literature, scientific papers, manuals and models, a methodology was created that is adapted to local conditions for each research zone. Data on each zone were processed and analyzed in order to determine the basic travel characteristics. The basic travel characteristics for related zones are presented in groups in order to better compare similarities and differences. Based on the obtained results on generated traffic and the selected set of independent variables for each zone, the trip rates of generated traffic were calculated and compared with the results of the American manual of generated traffic. Also, conclusions were drawn on the usability of the generated traffic rates from the American manual and the relationship between the basic travel characteristics and their impact on the calculated generated trip rates.","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71132534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analiza temperatura na mjernim mjestima komponenti vjetroagregata 1 u VE "Rudine" 温度分析：1 u VE“Rudine”
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2201073k
Gojko Krunić, Srđan Vasković, Srećko Krile, Boris Reščec
{"title":"Analiza temperatura na mjernim mjestima komponenti vjetroagregata 1 u VE \"Rudine\"","authors":"Gojko Krunić, Srđan Vasković, Srećko Krile, Boris Reščec","doi":"10.5937/tehnika2201073k","DOIUrl":"https://doi.org/10.5937/tehnika2201073k","url":null,"abstract":"The paper presents an analysis of the temperature at the measuring points of individual components of wind turbines 1 in the wind farm (WPP) \"Rudine\". The characteristics of hubs, gearbox, generators and nacelles of wind turbines 1 are described. The temperature movements at the measuring points of the mentioned components during one day during different equidistant ten-minute intervals are shown. The minimum, average and maximum temperatures at the measuring points of the wind turbine 1 components were analyzed, the times of their occurrence were recorded and the ten-minute intervals in which they were measured were stated. By comparing the measurement data measured at the measurement locations of wind turbine 1 components, it is possible to observe their interdependence.","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71129630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Novelties in the Sector for Quality and Products' Safety of the Ministry of Economy, during 2021 经济部质量和产品安全部门在2021年的创新
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2201134d
Miodrag Dugandžija
{"title":"Novelties in the Sector for Quality and Products' Safety of the Ministry of Economy, during 2021","authors":"Miodrag Dugandžija","doi":"10.5937/tehnika2201134d","DOIUrl":"https://doi.org/10.5937/tehnika2201134d","url":null,"abstract":"This paper describes the most significant activities and results of the Sector for Quality and Products Safety of the Ministry of Economy, until the end of 2021. The Ministry of Economy - coordinator for technical regulations and authority responsible for creating strategies and policies for the development of standardization, metrology, accreditation and conformity assessment (Quality Infrastructure), has established a stable legal and institutional framework in these areas, over the last 15 years. The quality infrastructure includes both public and private institutions in these areas, but also the legal framework in which they operate. The activities of the Sector for Product Quality and Safety during the 2021, were aimed at improving legal framework for prescribing technical requirements for products and conformity assessment; system of accreditation and system of control of the precious metals articles. The paper also describes the state of play in the EU accession process in the area of Free Movement of Goods, and provides a reached degree of harmonization of product safety regulations of the European single market. The paper also talks about initiatives of the relevant Sector of the Ministry of Economy, in order to create an economic environment suitable for integration into the European and global economies, harmonizing business processes with international standards during all phases of product design, production and control.","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71130491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On capabilities of quantum-mechanical computer models 关于量子力学计算机模型的能力
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2203337s
Svetomir Simonović
{"title":"On capabilities of quantum-mechanical computer models","authors":"Svetomir Simonović","doi":"10.5937/tehnika2203337s","DOIUrl":"https://doi.org/10.5937/tehnika2203337s","url":null,"abstract":"The work includes the analyses of the theoretical capabilities of quantum-mechanical versus classical computer models in terms of their universality, their application domain, their efficacy in solving the problems and their technological feasibility. The concepts of deterministic Turing machine, probabilistic Turing machine and quantum-mechanical Turing machine are exposed. The concept of basic information unit of quantum-mechanical computer modelqubit is introduced and the qubit is represented through the use of Bloch sphere. The use of Dirac's bra-ket notation in description of quantum-mechanical state is explained, and the notation is used to form state equation of a quantummechanical Turing machine cell. Especially, consequences of quantum parallelism, quantum interference and wave function collapse are studied in respect to capabilities of quantum-mechanical computer models. The interrelationship between classes of problems that can be efficiently solved by quantum mechanical and/or classical computer models is displayed.","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71130842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evidence for and against the validity of the capital asset Pricing model 支持和反对资本资产定价模型有效性的证据
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2203363l
M. Lekovič
{"title":"Evidence for and against the validity of the capital asset Pricing model","authors":"M. Lekovič","doi":"10.5937/tehnika2203363l","DOIUrl":"https://doi.org/10.5937/tehnika2203363l","url":null,"abstract":"The Capital Asset Pricing Model (CAPM) makes a significant contribution to understanding the relationship between return and risk and valuing assets in the capital market. The basic idea of the CAPM model is that assets exposed to the same level of systemic risk should have the same level of expected return. Therefore, the CAPM model values the asset, ie. determines its price at a level that ensures that the expected return corresponds to the assumed systemic risk. In addition to the positive aspects of the CAPM model, the paper pays equal attention to understanding the problems and taking into account the shortcomings and limitations that this model faces. The aim of the research is to find an answer to the question of whether the CAPM model is the correct model for valuing financial assets. In this regard, the paper presents numerous pieces of evidence for and against the validity of the CAPM model, concluding that, even after more than half a century of research, no consensus has been reached in the financial literature on the presence or absence of its validity.","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71131020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of changes in organizational and management processes in the management system 确定管理体系中组织和管理过程的变更
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2204492m
M. Mihajlović, Svetlana Tasić, N. Knežević
{"title":"Determination of changes in organizational and management processes in the management system","authors":"M. Mihajlović, Svetlana Tasić, N. Knežević","doi":"10.5937/tehnika2204492m","DOIUrl":"https://doi.org/10.5937/tehnika2204492m","url":null,"abstract":"Managing business organizations is a complex and dynamic process, aimed at effectively and efficiently directing limited resources. Based on that, the business success of the company is largely conditioned by the quality and ability of its management to create an adequate organizational structure that will respond to the challenges in the environment. In recent decades, there have been numerous and dramatic changes in the business environment, which lead to a comprehensive transformation of existing management processes and thus the dynamic development of theory and practice of modern management.","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71131420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of theoretical and isotropic models of incoming solar radiation for the tilted, fixed, flat-plate solar collector southoriented 南向倾斜固定平板太阳能集热器入射太阳辐射理论模型与各向同性模型的比较
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2205553n
A. Nešović
{"title":"Comparison of theoretical and isotropic models of incoming solar radiation for the tilted, fixed, flat-plate solar collector southoriented","authors":"A. Nešović","doi":"10.5937/tehnika2205553n","DOIUrl":"https://doi.org/10.5937/tehnika2205553n","url":null,"abstract":"Knowing the intensity of incoming solar radiation is the starting point for any further analysis of the thermal performance of (all) solar collectors. A large number of existing theoretical models (both isotropic and anisotropic) can be justified by the complexity of determining its components, because the total solar radiation for an arbitrarily oriented surface of the solar collector consists of: direct, diffuse and reflected solar radiation. In the first part of the paper, three theoretical and isotropic models of incoming solar radiation are presented in detail, for the tilted, fixed, flat-plate solar collector oriented to the south, presented in the works of the following authors: LUKIĆ-BABIĆ, WIDÉN-MUNKHAMMAR and DESPOTOVIĆ. In the second part of the paper, using the mentioned methods, the incoming solar radiation was calculated by comparing the obtained results, all with the aim of facilitating (by pointing out the advantages and disadvantages of their use) other researchers to select the appropriate solar model in theoretical calculations of the solar collectors.","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71131573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative analysis of concrete integral overpass with variable soil characteristic 变土特性混凝土整体立交桥的对比分析
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2201027m
Stefan Mitrović, S. Mašović
{"title":"Comparative analysis of concrete integral overpass with variable soil characteristic","authors":"Stefan Mitrović, S. Mašović","doi":"10.5937/tehnika2201027m","DOIUrl":"https://doi.org/10.5937/tehnika2201027m","url":null,"abstract":"In this paper concrete integral overpass with span of 30 meters on magistral road which based on piles is considered. It is analysed influence of soil stiffness on value of design forces and pile stress. Three types of soil is considered in this analysis, where stiffness of soil was determined with characteristic of soil layers. For this analysis was made numerical model of this overpass in software CSiBridge v20 where is soil modeled with \"springs\" (flexible supports) placed along the piles whose stiffness match with stiffness of soil layer.","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71129100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Analysis of braking parameters in testing of brake wear and particles formation on inertial brake dynamometer 惯性制动测功机制动磨损与颗粒形成试验中的制动参数分析
Tehnika Pub Date : 2022-01-01 DOI: 10.5937/tehnika2202195v
S. Vasiljević, J. Glišović, J. Lukić, N. Stojanović, I. Grujić
{"title":"Analysis of braking parameters in testing of brake wear and particles formation on inertial brake dynamometer","authors":"S. Vasiljević, J. Glišović, J. Lukić, N. Stojanović, I. Grujić","doi":"10.5937/tehnika2202195v","DOIUrl":"https://doi.org/10.5937/tehnika2202195v","url":null,"abstract":"In parallel with the significant reduction of the impact of vehicles on the environment, the development of modern propulsion systems that have less and less harmful impact, new pollutants are being identified on the vehicle. One of the such pollutants is the brakes, which wear out and lead to the formation of particles that are released into the air, i.e. generally into the environment. Investigation of the mechanism of particle formation during braking, and thus the brake wear is today becoming one of the important areas of research. The most common tests in this area are performed using initial brake dynamometers and pin-on-disc machines. An overview of the influence of some operation parameters (initial vehicle speed, braking pressure, and deceleration) that varies frequently during testing on an inertial brake dynamometer is performed in this paper. There are a number of tests and cycles that are applied during research, but they are not specifically prescribed for testing the particle formation during braking. The UNECE (United Nations Economic Commission for Europe) has included it in its plan and is in the development phase of introducing standardized cycles that will prescribe the braking cycle, the purpose of which will be to examine the formation of particles. This kind of review paper can be important for researchers who are engaged in this field, and the develop their own cycles or tests to examine the concentration or mass of particles formed during braking.","PeriodicalId":22484,"journal":{"name":"Tehnika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71130203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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