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Articoli di riviste sul tema "Machinery"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Smolyak, S. A. "The Poisson process of machinery degradation: Application to valuation." Journal of the New Economic Association 48, no. 4 (2020): 63–84. http://dx.doi.org/10.31737/2221-2264-2020-48-4-3.

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The machinery degradation process is described by a random process in which failures occur with constant intensity, and with each failure the rate of benefits generated by the machinery item reduces by a random amount. If the machinery item begins to generate negative benefits, it is subject to decommissioning. We get explicit expressions for the average life of the machinery items and the coefficient of variation of the service life. Machine’s value is determined by discounting the flow of benefits from its future use. This allows to link this value with the rate of benefits that the machiner

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2

Ji, Leilei, Ramesh K. Agarwal, and Yang Yang. "Design and Optimization of Fluid Machinery, 2nd Edition." Water 17, no. 5 (2025): 720. https://doi.org/10.3390/w17050720.

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Fluid machinery is widely used in industrial production, particularly in industries such as chemical engineering, agriculture, and water resources. With the development of industrial society, the application scope of fluid machinery continues to expand, leading to higher demands for its performance. There is an urgent need to develop and manufacture fluid machinery with superior performance, which requires the optimization design of fluid machinery. This must focus on aspects such as flow mechanisms and energy losses, exploring the factors that affect fluid machinery’s performance in order to

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3

Akram, Muhammad Waqar, Nida Akram, Hongshu Wang, et al. "Socioeconomics Determinants to Adopt Agricultural Machinery for Sustainable Organic Farming in Pakistan: A Multinomial Probit Model." Sustainability 12, no. 23 (2020): 9806. http://dx.doi.org/10.3390/su12239806.

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Urbanization and low productivity are real threats to the sustainability of organic farming. The adoption of farm machinery plays a vital role in overcoming these threats to ensure a sustainable and more profitable organic farming model. Farm machinery can also increase farmland yield and reduce the need for labor, although the requirement of significant capital investment often prevents small farmers from buying machinery. There is an increased need to comprehend all relevant elements associated with farming machinery procurement and service delivery. In this article, we provide insight into

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4

Bhatti, Saima, Asif Ali Shaikh, Asif Mansoor, and Ramsha Shaikh. "Extraction and classification of vibration features of rolling element bearing with increasing the rotational speed." Mehran University Research Journal of Engineering and Technology 43, no. 4 (2024): 182. http://dx.doi.org/10.22581/muet1982.3281.

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Machinery components degrade over time due to continuous use. A reliable prognosis framework can improve machinery health by monitoring the behavior of its parts and providing warnings before critical failures occur. Bearings, which are essential components of rotating machinery, help maintenance personnel assess the machine’s condition during continuous wear. In this study, vibration data from roller bearings under various conditions and faults were collected. The Vibration analysis technique was employed to detect and classify different faults in bearings based on the characteristics of the

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5

Torpy, Janet M. "Machinery." JAMA 308, no. 9 (2012): 844. http://dx.doi.org/10.1001/jama.2012.3179.

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6

Ishida, Teruo, and Kazuhide Chikaoka. "Weaving Machinery and its Related Machinery." Journal of the Textile Machinery Society of Japan 36, no. 1 (1990): 15–19. http://dx.doi.org/10.4188/jte1955.36.15.

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7

Chikaoka, Kazuhide, and Toshiyasu Kinari. "Weaving Machinery and its Related Machinery." Journal of the Textile Machinery Society of Japan 40, no. 1 (1994): 19–26. http://dx.doi.org/10.4188/jte1955.40.19.

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8

Liao, W. Z., and Y. Wang. "Dynamic Predictive Maintenance Model Based on Data-Driven Machinery Prognostics Approach." Applied Mechanics and Materials 143-144 (December 2011): 901–6. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.901.

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As an increasing number of manufacturers realize the importance of adopting new maintenance technologies to enable systems to achieve near-zero downtime, machinery prognostics which enables this paradigm shift from traditional fail-and-fix maintenance to a predict-and-prevent paradigm has arose interests from researchers. Machine's condition and degradation estimated by machinery prognostics approach can be used to support predictive maintenance policy. This paper develops a novel data-driven machine prognostics approach to assess machine's health condition and predict machine degradation. Wit

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9

Smolyak, Sergey A. "Valuation of Machines with a Random Service Life Based on the System of National Accounts – 2008." Economics of Contemporary Russia, no. 2 (July 5, 2021): 40–57. http://dx.doi.org/10.33293/1609-1442-2021-2(93)-40-57.

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We propose a mathematical model describing the decrease in the market value of machines (depreciation) with age in a situation where its service life is random and has a Weibull distribution. We measure the depreciation of a used machinery item using a goodness factor, that is, the ratio of its value to the value of a similar new machinery item. The model is based on the principle of anticipation of benefits adopted in the valuation theory and the discounting cash flows method. The model takes into account that machine’s technical and economic characteristics deteriorate with age and its benef

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10

Wang, Li, Yi Qi Zhou, and Zhen Hua Wang. "CFD Research on Aerodynamic Performance of Complicated Resistance Muffler." Applied Mechanics and Materials 34-35 (October 2010): 1274–78. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1274.

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In this paper, a complicated resistance muffler was designed for a construction machinery. Computational Fluid Dynamics (CFD) method with three dimension models was used to explore the aerodynamic performance of the muffler. With this method the pressure distribution in the muffler is simulated and the pressure loss is predicted for the structure modification. The experiment results verify that the assembly performance of the muffler modified is better than the original muffler. The pressure loss and the insert loss of the improved muffler meet the design specifications and standards of the co

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11

MU, Hongyun, Yanlei LUO, and Yu LUO. "Electro-Hydraulic Load-Sensitive Simulation Study of Walking Hy-draulic System of Electric Agricultural Machinery." Mechanics 28, no. 6 (2022): 481–89. http://dx.doi.org/10.5755/j02.mech.31470.

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The conventional load-sensitive hydraulic drive chassis system for agricultural machinery uses a combination of engine and load-sensitive pump, which cannot adjust the control strategy according to the working conditions. It does not meet the current trend of energy-saving and emission reduction. To this end, an electro-hydraulic load-sensitive hydraulic drive chassis system for agricultural machinery, which uses a combination of permanent magnet synchronous motor and quantitative pump, is proposed. A variable LS differential pressure control and a variable differential pressure control of the

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12

Hosokawa, Jyuzo. "Spinning Machinery." Journal of the Textile Machinery Society of Japan 32, no. 3 (1986): 61–66. http://dx.doi.org/10.4188/jte1955.32.61.

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13

Itoh, Satoru. "Knitting Machinery." Journal of the Textile Machinery Society of Japan 32, no. 3 (1986): 70–75. http://dx.doi.org/10.4188/jte1955.32.70.

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14

Itoh, Satoru. "Knitting Machinery." Journal of the Textile Machinery Society of Japan 36, no. 1 (1990): 19–27. http://dx.doi.org/10.4188/jte1955.36.19.

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15

Hosokawa, Jyuzo. "Spinning Machinery." Journal of the Textile Machinery Society of Japan 36, no. 1 (1990): 8–15. http://dx.doi.org/10.4188/jte1955.36.8.

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16

Hosokawa, Juzo, and Taro Nishimura. "Spinning Machinery." Journal of the Textile Machinery Society of Japan 40, no. 1 (1994): 14–19. http://dx.doi.org/10.4188/jte1955.40.14.

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17

Itoh, Satoru. "Knitting Machinery." Journal of the Textile Machinery Society of Japan 40, no. 2 (1994): 39–48. http://dx.doi.org/10.4188/jte1955.40.39.

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18

Nishimura, Taro. "Spinning Machinery." Journal of the Textile Machinery Society of Japan 44, no. 2 (1998): 31–34. http://dx.doi.org/10.4188/jte1955.44.31.

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19

Rudd, Joy, Sheelagh Drudy, Kathleen Lynch, et al. "Murder Machinery." Books Ireland, no. 174 (1994): 10. http://dx.doi.org/10.2307/20626828.

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20

Lyon, Richard H. "Machinery diagnostics." Journal of the Acoustical Society of America 84, S1 (1988): S168. http://dx.doi.org/10.1121/1.2025947.

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21

Dewrance, John. "MACHINERY BEARINGS." Journal of the American Society for Naval Engineers 9, no. 1 (2009): 104–17. http://dx.doi.org/10.1111/j.1559-3584.1897.tb00708.x.

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22

Marchini, G. "Intelligent Machinery." Electronics and Power 33, no. 1 (1987): 71. http://dx.doi.org/10.1049/ep.1987.0043.

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23

Ku, Y. H. "Electric machinery." Journal of the Franklin Institute 319, no. 4 (1985): 457. http://dx.doi.org/10.1016/0016-0032(85)90014-6.

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24

Feynman, R. "Infinitesimal machinery." Journal of Microelectromechanical Systems 2, no. 1 (1993): 4–14. http://dx.doi.org/10.1109/84.232589.

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25

Ridley, John. "Machinery Directive." Manufacturing Engineer 68, no. 8 (1989): 46. http://dx.doi.org/10.1049/me:19890129.

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26

Fox, Robert. "Romantic machinery." Metascience 23, no. 2 (2013): 365–67. http://dx.doi.org/10.1007/s11016-013-9828-9.

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27

Niemeyer, Christof M. "Living machinery." Nature 430, no. 6995 (2004): 20. http://dx.doi.org/10.1038/430020a.

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28

Muske, Carol. "Solar Machinery." Missouri Review 9, no. 1 (1985): 19. http://dx.doi.org/10.1353/mis.1985.0137.

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29

Wershler-Henry, Darren. "Literary Machinery." American Book Review 29, no. 3 (2008): 12. http://dx.doi.org/10.1353/abr.2008.0018.

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30

Anderson, Ernest H. B. "TURBINE MACHINERY." Journal of the American Society for Naval Engineers 26, no. 4 (2009): 1365–68. http://dx.doi.org/10.1111/j.1559-3584.1914.tb00359.x.

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31

Davey, P. G. "Sensible machinery." International Journal of Advanced Manufacturing Technology 1, no. 3 (1986): 1–2. http://dx.doi.org/10.1007/bf02601449.

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32

Stewart, Richard. "MACHINERY ANNUAL." Plastics Engineering 63, no. 12 (2007): 18–31. http://dx.doi.org/10.1002/j.1941-9635.2007.tb00247.x.

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33

Dong, Zeng Shou, Yue Jun Hao, Ren Wang Song, and Jian Chao Zeng. "Wireless Data Acquisition Module Design Based on ATmega16." Applied Mechanics and Materials 48-49 (February 2011): 1363–67. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.1363.

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This paper designs a failure signal remote collection terminal based on engineering mechanical hydraulic system. The terminal takes ATmega16 microcontroller as control core, using BenQ M22A module for GPRS wireless transmission. It overcomes region and time limit of engineering machinery and monitors engineering machinery's running status at any real-time, provides the basis for engineering machinery's breakdown service.

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34

Gong, Jiancheng, Xiaoqiang Yang, Fan Pan, Wuqiang Liu, and Fuming Zhou. "An Integrated Fault Diagnosis Method for Rotating Machinery Based on Improved Multivariate Multiscale Amplitude-Aware Permutation Entropy and Uniform Phase Empirical Mode Decomposition." Shock and Vibration 2021 (August 6, 2021): 1–22. http://dx.doi.org/10.1155/2021/2098892.

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Rotating machinery refers to machinery that executes specific functions mainly relying on their rotation. They are widely used in engineering applications. Bearings and gearboxes play a key role in rotating machinery, and their states can directly affect the operation status of the whole rotating machinery. Accurate fault detection and judgment of bearing, gearbox, and other key parts are of great significance to the rotating machinery’s normal operation. A new fault feature extraction algorithm for rotating machinery called Improved Multivariate Multiscale Amplitude-Aware Permutation Entropy

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35

Dogra, Vaishally. "Nonlinear Dynamics and Vibration Analysis of Rotating Machinery." Mathematical Statistician and Engineering Applications 70, no. 1 (2021): 527–39. http://dx.doi.org/10.17762/msea.v70i1.2506.

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In a variety of engineering disciplines, including the mechanical, aerospace, and energy industries, the study of nonlinear dynamics and vibration analysis of rotating machinery has become increasingly important. In many applications, including turbines, engines, compressors, and pumps, rotating machinery is essential for both the performance and safety of the entire system. Nonlinearities, on the other hand, add intricate dynamic behaviours and vibration phenomena into these systems, which can result in subpar performance, excessive wear, and even catastrophic failures.The goal of this resear

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36

SHIMIZU, Yoshiharu. "Sanitary of Food Machinery : Sanitary of Pumping Food Machinery." Journal of the Society of Mechanical Engineers 92, no. 846 (1989): 446–50. http://dx.doi.org/10.1299/jsmemag.92.846_446.

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37

Temirbaeva, Nazgul, Maksat Sadykov, Zhanarbek Osmonov, Ysman Osmonov, and Urmat Karasartov. "Renewable energy sources in Kyrgyzstan and energy supply to rural consumers." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 22–32. http://dx.doi.org/10.31548/machinery/3.2024.22.

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The study assesses the potential of renewable energy sources in Kyrgyzstan and explores their application to provide energy to rural consumers. This study used an approximation of the parabolic function of solar radiation change, statistical processing of data on the average annual water flow of small rivers, as well as calculation of the volume of manure produced and its processing into biogas and bio fertilisers to assess their potential in agriculture and environmental impact. Kyrgyzstan, located between 40 and 68° north latitude, has evenly distributed solar radiation, small rivers and bio

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38

Кulinchenko, Heorhii, Andrii Panych, Andrii Masliennikov, and Petro Leontiev. "Research of the regulator of an expander-generator unit." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 33–46. http://dx.doi.org/10.31548/machinery/3.2024.33.

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The relevance of research is determined by the tasks of increasing the efficiency of alternative and renewable energy power plants. The purpose of the work is to develop a method of coordinating the settings of the automatic excitation regulators and the speed of rotation of the rotor of the generator from the vortex installation of the expander-generator unit, which is part of the autonomous power consumption network. To achieve the goal, the methods of mathematical modelling in the MATLAB environment, physical modelling, processing of experimental data, theory of automatic control, theory of

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39

Aliiev, Elchyn, and Hennadii Tesliuk. "Analytical justifications of constructive parameters of bionic colters for vertical soil treatment." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 129–39. http://dx.doi.org/10.31548/machinery/3.2024.129.

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Bionic coulters imitate natural forms and functions, which help reduce energy costs for soil tillage. The aim of the research was to justify the design and structural parameters of turbo discs (coulters) for vertical tillage based on the principles of bionic reverse engineering. Using this method, an equation for the shape of the turbo discs (coulters) was derived, which was obtained by approximating the shell of the argonaut (Argonauta argo). The equation takes into account the main structural parameters of the turbo discs: diameter Dd, cutout height Hm, wave height Hw, number of cutouts n, a

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40

Kresan, Тetiana, Ali Kadhim Ahmed, Serhii Pylypaka, Tatiana Volina, and Taras Voloshko. "Construction of the working surfaces of the tillage screw body from the compartments of the developable helicoid." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 9–21. http://dx.doi.org/10.31548/machinery/3.2024.09.

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Improvement of the screw working bodies for surface tillage is important for increasing the efficiency and quality of agricultural work. The purpose of the work was to calculate the design of the screw a working body for the surface cultivation of the soil from the compartment of the developable helicoid, which would perform the technological process with minimal resistance to plunging in the soil. The surface theory, analytical, and differential geometry were used to design the working body. It is shown in the paper that through a given spiral line, which is the cutting edge of the surface (b

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41

Sadovoy, Oleksiy, Vasyl Hruban, Mekhailo Fedorchuk, and Valentyna Fedorchuk. "Optimisation of solar power plant parameters for use in sprinklers in Southern Ukraine." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 117–28. http://dx.doi.org/10.31548/machinery/3.2024.117.

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The study aimed to assess the effectiveness of integrating solar power plants into sprinklers in the Mykolaiv region. Modelling methods, practical tests and analysis of system efficiency were used to optimise the parameters of a solar power plant in the South of Ukraine. The results showed that for sprinklers in this region, a solar power plant should have sufficient capacity to meet the energy needs without significantly increasing the weight of the equipment. The most effective solution was to place the solar panels near the Zimmatic-354M machine, which ensures maximum solar energy productio

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42

Kravets, Taras, Mykhailo Semerak, Igor Galyanchuk, Oksana Yurasova, and Andrii Kharchuk. "Analytical study on improving the efficiency and environmental friendliness of solid organic fuels." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 84–93. http://dx.doi.org/10.31548/machinery/3.2024.84.

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The purpose of this study was to analyse methods of increasing the efficiency and environmental friendliness of the use of solid organic fuels (SOF) in electricity generation. This study employed a comprehensive approach to the analysis and optimisation of technological processes, operational systems, and environmental aspects of the use of SOF. The study found that the use of modern technologies, such as gasification and pyrolysis, considerably increases the efficiency of converting SOF into electricity. Optimisation of boiler and turbine designs and automation of fuel supply systems helps to

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43

Gai, Oleksandr, Oleksandr Novoseltsev, Anton Vorushylo, Olga Khomyak, and Hanna Gai. "Features of multi-agent evaluation of of microgrid systems efficiency in parallel operation with the power system according to the reliability criterion." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 73–83. http://dx.doi.org/10.31548/machinery/3.2024.73.

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Ensuring reliable electricity supply to consumers in the face of destruction of critical energy infrastructure and shortage of generating capacities in Ukraine requires the development of distribution systems and their management systems. The purpose of the study was to substantiate the development of models for ensuring the optimal structure of electrical distribution networks under the conditions of connecting micro-networks according to the reliability criterion in conditions of limited investments. The paper uses a method for assessing the structural reliability of complex electrical syste

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Abilov, Rashad Saffan. "Research and improvement of the design of a sedimentation tank for hydropower and irrigation." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 60–72. http://dx.doi.org/10.31548/machinery/3.2024.60.

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The study is devoted to the analysis and optimisation of the design of the sedimentation tank to increase the efficiency of settling solid particles in hydropower and irrigation systems. Both experimental and numerical methods were used to analyse and optimise the design of sedimentation tanks to increase their efficiency in hydropower and irrigation systems. The study examined and analysed various types of sedimentation tanks according to design schemes, flow regime, deposition dynamics and sediment flushing methods, and also considered recommended improvements for hydropower and irrigation o

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Mikhailova, Lyudmyla, Olga Zavytii, Mykola Horlachuk, Dariia Vilchinska, and Oleh Kondratiuk. "Search for innovative solutions to improve the energy system of Ukraine: World experience." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 103–16. http://dx.doi.org/10.31548/machinery/3.2024.103.

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This study analyses the global experience of introducing innovations in the energy sector to identify effective solutions that can be applied to improve the energy system of Ukraine. The research methods included a comparative analysis of international experience in the energy sector, an assessment of the possibilities of adapting innovative technologies to Ukrainian conditions, and an examination of technical and economic aspects of integrating new solutions. The study analysed the experience of countries such as Germany, Denmark, the United States, Finland, the Netherlands, Sweden, Japan, Ch

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Romasevych, Yuriy, Viatcheslav Loveikin, and Viktor Krushelnytskyi. "Comparative study of PI-controller and neurocontroller performances in optimal by settling time control problems." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 94–102. http://dx.doi.org/10.31548/machinery/3.2024.94.

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When developing control systems, an important issue arises of choosing an operator, which forms the control function. The standard approach is to use a PI- or PID-controller, a more advanced approach involves ANNs training for this purpose. A comparative analysis of the PI- and neurocontroller performances makes it possible to establish the disadvantages and advantages of each of the compared controllers, which is an important scientific and applied problem. The purpose of the work was to conduct a comparative analysis of the performance of the PI-controller and the neurocontroller based on a

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47

Askaraliev, Bakytbek, Kasiet Musabaeva, Baratali Koshmatov, Kanat Omurzakov, and Zhyparkul Dzhakshylykova. "Development of modern irrigation systems for improving efficiency, reducing water consumption and increasing yields." Naukovij žurnal «Tehnìka ta energetika» 15, no. 3 (2024): 47–59. http://dx.doi.org/10.31548/machinery/3.2024.47.

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The study was conducted to examine modern irrigation systems aimed at improving water efficiency, reducing water consumption and increasing crop yields. The study analysed the environmental and socio-economic aspects of modern irrigation systems, including their impact on the environment and social sustainability of agriculture. The study determined that the use of modern irrigation systems, such as drip irrigation and IoT-based automatic control systems, can significantly improve the efficiency of water use in agriculture. Data analysis demonstrated that such systems can reduce water consumpt

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Slavinskyi, Dmytro, Tamara Bilko, Yury Cheberyachko, Sergij Vambol, and Olena Yavorska. "Research of the influence of filter element resistance on the powered air-purifying respirator service life." Naukovij žurnal «Tehnìka ta energetika» 15, no. 4 (2024): 34–46. https://doi.org/10.31548/machinery/4.2024.34.

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The purpose of the research was to determine the influence of the increasing resistance of filter elements on the service life of powered air-purifying respirators during operation in mining conditions and to substantiate the parameters of the respirator power source. The research was conducted by the computer-based simulation methods for the powered air-purifying respirator operation, which allows estimating the additional resistance of the filter caused by dust accumulation. The simulation model of the powered air-purifying respirator was developed on the basis of its physical model and, tak

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Zavodyannyi, Viktor, Mykola Voloshyn, Volodymyr Kravchenko, Valentina Zubenko, and Roman Zhesan. "Experimental study of heat exchangers and mixing machines operation optimisation methods." Naukovij žurnal «Tehnìka ta energetika» 15, no. 4 (2024): 82–93. https://doi.org/10.31548/machinery/4.2024.82.

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The study aimed to optimise the operation of heat exchangers and mixing machines to improve the efficiency of production processes. An experimental approach with models that describe the processes of heat transfer, hydraulic resistance and mixture homogeneity was used to determine the optimal equipment parameters. The study showed that optimisation of the operation of heat exchangers can lead to a significant increase in energy efficiency and a reduction in operating costs. The best results were achieved at a coolant temperature of 90°C and a pressure of 5 bar, which resulted in a maximum heat

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Dovhal, Artem, and Yulian Tuz. "Methods of high voltage generation by cascading amplifiers." Naukovij žurnal «Tehnìka ta energetika» 15, no. 4 (2024): 106–17. https://doi.org/10.31548/machinery/4.2024.106.

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Abstract (sommario):

The purpose of this study was to create a new model of a high-voltage measuring amplifier that would include several stages of operational amplifiers to increase the operating voltage range by sequentially “virtual” connecting the output voltages of each stage. The research methodology included the use of cascaded amplifier coupling, an additive error correction scheme, as well as modelling and computational studies to optimise the design of high-voltage operational amplifiers. The study results showed that the use of high-voltage operational amplifiers RA94 provides high stability and accurac

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