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Journal articles on the topic 'Theory of engines'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Wang, Meng-Hui, and Pi-Chu Wu. "Fault Diagnosis of Car Engine by Using a Novel GA-Based Extension Recognition Method." Mathematical Problems in Engineering 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/735485.

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Due to the passenger’s security, the recognized hidden faults in car engines are the most important work for a maintenance engineer, so they can regulate the engines to be safe and improve the reliability of automobile systems. In this paper, we will present a novel fault recognition method based on the genetic algorithm (GA) and the extension theory and also apply this method to the fault recognition of a practical car engine. The proposed recognition method has been tested on the Nissan Cefiro 2.0 engine and has also been compared to other traditional classification methods. Experimental res

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Li, Xi Qin, Su Yan Cai, Bing Liu, and Xue Qun He. "Study on Emission Control of CNG Engine Based on D-S Evidence Theory." Applied Mechanics and Materials 109 (October 2011): 281–84. http://dx.doi.org/10.4028/www.scientific.net/amm.109.281.

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To reduce emissions, CNG engines are commonly equipped with three-way catalytic converters. However when the engines run at transient conditions, the air fuel ratio can not be precisely controlled at theoretical value by traditional means, so the catalytic converters can not achieve their desired effect. This paper presents a new method for CNG engines to control air fuel ratio at transient conditions. The moments which intake and exhaust valves open are used as the trigger signals for ECU to collect the test data simultaneously. The dynamic information of CNG engine is detected by multiple se

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Anisimov, Victor, and Vasyl Muzychuk. "DETERMINATION OF RESIDUAL FUEL RESOURCE AUTOTRACTOR DIESEL EQUIPMENT BY MATHEMATICAL MODELING WITH METHOD APPLICATION SMALL DEVELOPMENTS." ENGINEERING, ENERGY, TRANSPORT AIC, no. 3(110) (October 30, 2020): 4–15. http://dx.doi.org/10.37128/2520-6168-2020-3-1.

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The reliability of automotive internal combustion engines is a function of the reliability of their mechanisms and systems. For many years, domestic and foreign engineers have tested many auto-tractor internal combustion engines and it has been proven that if mathematical models reliably describe physical phenomena, cycles or processes that take place in engines, then the theory of small deviations for theoretical research is much better than any experiment on control characteristics and many second parameters The theory of small deviations for fuel equipment of autotractor diesel engines is c

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Nambiar, K. K. "Theory of search engines." Computers & Mathematics with Applications 42, no. 12 (2001): 1523–26. http://dx.doi.org/10.1016/s0898-1221(01)00259-0.

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Wei, Kaixiang. "Turbofan and turbojet engines: Working process and future development." Theoretical and Natural Science 12, no. 1 (2023): 114–19. http://dx.doi.org/10.54254/2753-8818/12/20230447.

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This article is based on the fundamental thermodynamics theory to analyze the difference between the turbojet and turbofan engines. The result of this article is that the turbofan engine is suitable for commercial use since it consumes less fuel and has a higher bypass ratio than the turbojet engine. But low bypass ratio engines can serve the military since they have a smaller volume and higher speed, suitable for air combat. The turbojet engine can travel at a supersonic speed since it has extremely high jet flow from the nozzle and much higher fuel consumption, so it is for military use. Thi

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ANDREI, Irina-Carmen, Mihai Victor PRICOP, Mihai Leonida NICULESCU, et al. "COMPARATIVE ANALYSIS FOR PERFORMANCE PREDICTION IN CASE OF IAR 99 AIRCRAFT PROPULSION SYSTEMS." SCIENTIFIC RESEARCH AND EDUCATION IN THE AIR FORCE 25 (July 31, 2024): 152–67. http://dx.doi.org/10.19062/2247-3173.2024.25.18.

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This paper presents a comparative analysis regarding Performance Prediction at Design and Off-Design Regimes, applied for two distinct constructions of Jet Engines as Propulsion Systems solutions for the IAR 99 Aircraft. Case Study #1 is represented by Turbojet Engine Rolls Royce VIPER MK 632-41 and Case Study #2 is represented by a Mixed Flows Turbofan Engine. The thorough study is based on appropriate Applicable Theory, which is detailed in the bibliographic references and can be accessed. Applicable Theory includes a part dedicated to Engine Parameter Identification, which is necessary to c

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Karmakar, Ronit. "Efficiency of AdS-RN Black Holes as Heat Engines in the Framework of Rastall Gravity." Journal of Physics: Conference Series 2957, no. 1 (2025): 012005. https://doi.org/10.1088/1742-6596/2957/1/012005.

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Abstract We compute the efficiencies of AdS-Reissner-Nordstrom black hole surrounded by quintessence, as heat engines in the framework of Rastall gravity. For this purpose, we construct a conventional heat engine system out of a black hole and tried to analyse the influence of various parameters of the theory on the efficiency of the engine. We also compared the obtained efficiencies with the carnot efficiency which is the maximum efficiency that is achievable for any heat engine. It was found that the parameters of the theory namely the charge q, rastall parameter β and structure constant Ns

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O'Reilly-Shah, Vikas N. "Delay Coordinate Embedding as Neuronally Implemented Information Processing: The State Space Theory of Consciousness." Journal of Consciousness Studies 32, no. 1 (2025): 127–59. https://doi.org/10.53765/20512201.32.1.132.

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This paper introduces the state space theory of consciousness, positing that the cortex processes information through delay coordinate embedding operationalized by recurrent neural network engines. This leverages the power of Takens' theorem, giving rise to representations of reality as points within state space. Consciousness is posited to arise at the highest order engines amongst hierarchical and parallel engine pathways. Consciousness is cast as a dynamic process rather than as a neuronal state, reconciling dualist intuitions with a monist perspective. Neuronal representations develop uniq

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Bilousov, E. V., and P. Billier. "FRENCH ENGINEER SABATHE LOUIS GASTON AND HIS ROLE IN CREATION OF DUAL COMBUSTION CYCLE." Internal Combustion Engines, no. 1 (July 26, 2021): 92–98. http://dx.doi.org/10.20998/0419-8719.2021.1.12.

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Almost immediately after Rudolph Diesel created his "rational" engine, attempts were made to improve it. Since at the end of the nineteenth and the beginning of the twentieth century, the theory of internal combustion engines had not yet been formed as a unified scientific system, there were no unified approaches to assessing the innovations proposed by individual engineers and scientists either. In this regard, disputes and litigations periodically arose related to the recognition of priority for a specific design or the proposed principle of work for a specific author. First of all, this was

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Bi, Shu Sheng, Shi Xing Fang, and Shi Hao Wang. "Electromagnetic Propulsion Aero-Engine Design Based on Ampere Theorem." Applied Mechanics and Materials 411-414 (September 2013): 1773–78. http://dx.doi.org/10.4028/www.scientific.net/amm.411-414.1773.

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This paper means to provide an innovative design of aero-engine after investigating existing aero-engines. It is a late model power plant design which is based on the watercraft electromagnetic propulsion technology and the theory that in electromagnetic field magnetic field generates Ampere force to current flow and in combination with specific structures of aero-engines. The design principle of this engine is that when the air working medium with high conductivity goes through an arc generator, it will ionize and produce plasma, which actions in the magnetic field that produced by built-in s

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Smith, Zackary, Priyo S. Pal, and Sebastian Deffner. "Endoreversible Otto Engines at Maximal Power." Journal of Non-Equilibrium Thermodynamics 45, no. 3 (2020): 305–10. http://dx.doi.org/10.1515/jnet-2020-0039.

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AbstractDespite its idealizations, thermodynamics has proven its power as a predictive theory for practical applications. In particular, the Curzon–Ahlborn efficiency provides a benchmark for any real engine operating at maximal power. Here we further develop the analysis of endoreversible Otto engines. For a generic class of working mediums, whose internal energy is proportional to some power of the temperature, we find that no engine can achieve the Carnot efficiency at finite power. However, we also find that for the specific example of photonic engines the efficiency at maximal power is hi

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Yeh, Chung Wei, and Kee Rong Wu. "An Integrated Multimedia Learning System for Reciprocating Internal Combustion Engines: RICEM." Applied Mechanics and Materials 39 (November 2010): 91–96. http://dx.doi.org/10.4028/www.scientific.net/amm.39.91.

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A cost-effective multimedia learning system, RICEM, for reciprocating internal combustion engines was proposed in this study. This system contained the graphical introduction of engine components, engine structure animation, thermal theory, feedback and assessment based on Mayer’s multimedia learning cognitive theory. Reciprocating internal combustion engines are used all over the world to drive compressors, pumps, electric generators, motor ships and other equipments. We used multimedia software to construct the learning system. An experiment comprising of two groups of 30 participants separa

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Chen, Lu Hua. "Study on Analysis of Vehicle Engine Failure Risk Based on ANP_FE." Advanced Materials Research 588-589 (November 2012): 198–202. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.198.

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The study focuses on the problem of risk analysis of vehicle engines’ failure. Based on investigation and analysis of vehicle engine, an index system which is suitable for analyzing vehicle engines’ failure is established. And a much perfect technique ANP_FE is introduced into the risk analyzing of vehicle engines’ failure. It has been found that this index system and analyzing technique has a good adaptability, the result could be used as a theoretical proof for the production and improvement. The theory, system, thinking and method could be used as a reference to the similar product.

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14

Cur, Krzysztof, Mirosław Kowalski, Paweł Stężycki, and Dariusz Ćwik. "Checking Aircraft Engines Adjustment." Journal of KONBiN 51, no. 2 (2021): 153–62. http://dx.doi.org/10.2478/jok-2021-0029.

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Abstract The paper presents a new approach to the process of regulating the basic parameters of a turbine jet engine. It presents a system for monitoring these parameters developed and put into operation and the creation of the so-called phase mapping of the engine speed increment. Its modular structure is described, which allows it to be adapted quite quickly to other types of aircraft engine units. Individual modules are based on mathematical descriptions from the theory of aircraft engines. The phase mapping of the engine speed indicates a dynamic change of this parameter. On this basis, th

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15

Girtler, Jerzy. "A Model of Fuel Combustion Process in The Marine Reciprocating Engine Work Space Taking Into Account Load and Wear of Crankshaft-Piston Assembly and The Theory of Semi-Markov Processes." Polish Maritime Research 23, no. 3 (2016): 50–57. http://dx.doi.org/10.1515/pomr-2016-0031.

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Abstract The article analyses the operation of reciprocal internal combustion engines, with marine engines used as an example. The analysis takes into account types of energy conversion in the work spaces (cylinders) of these engines, loads of their crankshaft-piston assemblies, and types of fuel combustion which can take place in these spaces during engine operation. It is highlighted that the analysed time-dependent loads of marine internal combustion engine crankshaft-piston assemblies are random processes. It is also indicated that the wear of elements of those assemblies resulting from th

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Mantilla, Juan Miguel, Camilo Andrés Falla, and Jorge Arturo Gómez. "Internal combustion engine exhaust pipe flow simulation. Part I: theoretical aspects." Ingeniería e Investigación 29, no. 1 (2009): 115–25. http://dx.doi.org/10.15446/ing.investig.v29n1.15151.

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Unsteady gas flow theory can be used for simulating a spark ignition internal combustion engine’s exhaust system, using pressure waves. The method explained here is based on the discretization of interpolated spaces (called meshes) which are located throughout the whole length of the exhaust pipe, irrespective of its form or size. The most important aspects of this theory are theoretically explored, such as pressure wave movement and shock and their application to cases found in real engines’ exhaust pipes. This work also considers how the simulation must be made, based on the previous explora

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17

Gharib, Hla, and György Kovács. "Implementation and Possibilities of Fuzzy Logic for Optimal Operation and Maintenance of Marine Diesel Engines." Machines 12, no. 6 (2024): 425. http://dx.doi.org/10.3390/machines12060425.

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This paper explores the implementation and possibilities of utilizing fuzzy logic theory for optimal operation and early fault detection in marine diesel engines. It emphasizes its role in managing the complexity and ambiguity inherent in engine performance and preventive maintenance. Preventive maintenance is crucial for ensuring the reliability and longevity of marine diesel engines. Implementing fuzzy logic control (FLC) systems can enhance the preventive maintenance strategies for these engines, leading to reduced downtime, lower maintenance costs, and improved overall performance. Through

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18

Anisimov, Victor, and Vasyl Muzychuk. "ANALYSIS AND CHOICE OF RESEARCH METHODS RELIABILITY OF AUTOTRACTOR ENGINES." ENGINEERING, ENERGY, TRANSPORT AIC, no. 3(106) (November 29, 2019): 35–45. http://dx.doi.org/10.37128/2520-6168-2019-3-5.

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The study of the reliability of the engine as a whole can be represented as a study of the probabilistic characteristics of its reliability according to the given probabilistic characteristics of the reliability of individual engine elements, that is, systems and mechanisms. The article substantiates that the method of similarity and dimensional theory allows us to establish patterns of change in the wear rate tgα depending on the adjustment of the engine parameters, and numerous experiments are required, which makes it little practical in determining the resource and predicting the operation

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19

Yeh, Chung Wei. "An Integrated Multimedia Learning System for Reciprocating Internal Combustion Engines: RICEM." Advanced Materials Research 213 (February 2011): 211–15. http://dx.doi.org/10.4028/www.scientific.net/amr.213.211.

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A cost-effective multimedia learning system, RICEM, for reciprocating internal combustion engines was proposed in this study. This system contained the graphical introduction of engine components, engine structure animation, feedback and assessment based on Mayer’s multimedia learning cognitive theory. Reciprocating internal combustion engines are used all over the world to drive compressors, pumps, electric generators, motor ships and other equipments. We used multimedia software to construct the learning system. An experiment comprising of two groups of 30 participants separately was conduct

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20

Daren, Y., C. Tao, and B. Wen. "An idea of distributed parameter control for scramjet engines." Aeronautical Journal 111, no. 1126 (2007): 787–96. http://dx.doi.org/10.1017/s0001924000001901.

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AbstractScramjet engines are used under extreme temperatures and with wide range of Mach numbers from 3 to 8 or higher and have shown different control properties from other airbreathing engines. New control problems involving distributed parameter control have been found concerning investigations of the control of scramjet engines whose physical states are spatially interacted and whose governing equations are partial differential equations. The work of this paper is based on the application of distributed parameter control conception to study the control problems of scramjet engines with the

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21

KOWALAK, Przemysław, Stefan ŻMUDZKI, and Tadeusz BORKOWSKI. "Marine diesel engine – a novel approach of indicated power determination and related uncertainty level." Combustion Engines 168, no. 1 (2017): 15–20. http://dx.doi.org/10.19206/ce-2017-102.

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A proposal of a new method for marine engine indicated power determination, based on direct piston position, instead of crankshaft angular position measurement, was presented. With the aid of bond graph theory, it was proved, that the new method is equivalent to conventional method. To verify hypothesis, that the new method has potential of determined indicated power uncertainty reduction, simulated calculations were carried out. Results of calculations for two marine diesel engines: medium-speed, four stroke and slowspeed two stroke type, at assumption of engine crankshaft constant speed, wer

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22

Andoga, Rudolf, Ladislav Főző, Radovan Kovács, Károly Beneda, Tomáš Moravec, and Michal Schreiner. "Robust Control of Small Turbojet Engines." Machines 7, no. 1 (2019): 3. http://dx.doi.org/10.3390/machines7010003.

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Modern turbojet engines mainly use computerized digital engine control systems. This opens the way for application of advanced algorithms aimed at increasing their operational efficiency and safety. The theory of robust control is a set of methods known for good results in complex control tasks, making them ideal candidates for application in the current turbojet engine control units. Different methodologies in the design of robust controllers, utilizing a small turbojet engine with variable exhaust nozzle designated as iSTC-21v, were therefore investigated in the article. The resulting contro

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GIRTLER, Jerzy. "Possibility of estimating the reliability of diesel engines by applying the theory of semi-Markov processes and making operational decisions by considering reliability of diagnosis on technical state of this sort of combustion engines." Combustion Engines 163, no. 4 (2015): 57–66. http://dx.doi.org/10.19206/ce-116857.

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The paper presents semi-Markov models of technical state transitions for diesel engines, useful for determining the reliability of engines. A possibility of application of a three-state model with a simplified matrix function, or even a two-state model, to determine reliability of the engines, has been described herein on examples of known from literature semi-Markov models, for the case when appropriate diagnosing systems (SDG) are used to identify the technical condition of the engines considered as diagnosed systems (SDN). A risk function and a renewal (restitution) function have been propo

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Pan, Meixia, Wanming Chen, Shengyuan Wang, and Xiaolan Wu. "The Influence of Low Carbon Emission Engine on the Life Cycle of Automotive Products: A Case Study of Three-Cylinder Models in the Chinese Market." Energies 15, no. 18 (2022): 6849. http://dx.doi.org/10.3390/en15186849.

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There is a development trend for fuel vehicles to adopt low-carbon emission engines. The sales of cars with low-carbon three-cylinder engines in the Chinese market have declined. Is the life cycle of automotive products with three-cylinder engines entering a recession stage? In order to achieve this research objective, which is to investigate whether assembling a three-cylinder engine affects the life cycle of an automotive product, this paper constructs an ecological theory-based approach to measuring the life cycle of automotive products. First, the logistic model is used to measure the intr

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Neider, Daniel, P. Madhusudan, Shambwaditya Saha, Pranav Garg, and Daejun Park. "A Learning-Based Approach to Synthesizing Invariants for Incomplete Verification Engines." Journal of Automated Reasoning 64, no. 7 (2020): 1523–52. http://dx.doi.org/10.1007/s10817-020-09570-z.

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Abstract We propose a framework for synthesizing inductive invariants for incomplete verification engines, which soundly reduce logical problems in undecidable theories to decidable theories. Our framework is based on the counterexample guided inductive synthesis principle and allows verification engines to communicate non-provability information to guide invariant synthesis. We show precisely how the verification engine can compute such non-provability information and how to build effective learning algorithms when invariants are expressed as Boolean combinations of a fixed set of predicates.

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Garcia-Atance Fatjo, Gonzalo, Edward H. Smith, and Ian Sherrington. "Piston-ring film thickness: Theory and experiment compared." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 232, no. 5 (2017): 550–67. http://dx.doi.org/10.1177/1350650117722257.

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A review of the published literature has demonstrated a large variability and discrepancies in the measured and predicted values of piston-ring lubricating film thickness in internal combustion engines. Only two papers have been found that compare experiments in firing engines directly with outputs from sophisticated ring-pack lubrication models. The agreement between theory and experiment in these comparisons was limited, possibly because of inadequacies in the models and/ or inaccuracies of measurement. This paper seeks to contribute to the literature by comparing accurately calibrated exper

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Ilyushchanka, A. Ph, A. K. Kryvanos, A. D. Chorny, and Y. Ya Piatsiushyk. "Methods of determination of the gas-dynamic characteristics of a jet nozzle of an aerodynamic object." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 66, no. 3 (2021): 320–28. http://dx.doi.org/10.29235/1561-8358-2021-66-3-320-328.

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The efﬁciency of aerodynamic objects with jet engines is the result of many factors, among which nozzle parameters are of great importance in relation to the general engine design and the energy source, that determines the composition and properties of the engine working medium. In this respect, an urgent need was to calculate nozzle gas-dynamic characteristics and geometric parameters at various designing and testing stages of jet engines. Relatively simple calculations involving a large number of assumptions and detailed modeling with regard to the maximum possible number of factors are the

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Freire, Ana, Craig Macdonald, Nicola Tonellotto, Iadh Ounis, and Fidel Cacheda. "Queuing Theory-based Latency/Power Tradeoff Models for Replicated Search Engines." JUCS - Journal of Universal Computer Science 21, no. (13) (2015): 1790–809. https://doi.org/10.3217/jucs-021-13-1790.

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Large-scale search engines are built upon huge infrastructures involvingthousands of computers in order to achieve fast response times. In contrast, the energy consumed (and hence the financial cost) is also high, leading to environmental damage. This paper proposes new approaches to increase energy and financial savings in large-scale search engines, while maintaining good query response times. We aim to improve current state-of-the-art models used for balancing power and latency, by integratingnew advanced features. On one hand, we propose to improve the power savings by completely powering

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Duc Luu, Do, and Nguyen Quang Vinh. "Affections of Turbine Nozzle Cross-Sectional Area to the Marine Diesel Engine Working." Naše more 68, no. 2 (2021): 65–73. http://dx.doi.org/10.17818/nm/2021/2.1.

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After a long period of use, some important technical parameters of the main marine diesel engines (MDE) gradually become worse, such as the turbine speed, intake pressure, exhaust temperature, engine power, and specific fuel oil consumption (SFOC). This paper studies the affections of the turbine nozzle cross-sectional area (AT) to MDE and presents a method of AT adjustment to improve the performances of MDE. A mathematical model of an engine was built based on the existent engine construction and the theory of the diesel engine working cycle and the simulation was programmed by Matlab/Simulin

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Reyes-Menendez, Ana, Jose Saura, Pedro Palos-Sanchez, and Jose Alvarez-Garcia. "Understanding User Behavioral Intention to Adopt a Search Engine that Promotes Sustainable Water Management." Symmetry 10, no. 11 (2018): 584. http://dx.doi.org/10.3390/sym10110584.

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An increase in users’ online searches, the social concern for an efficient management of resources such as water, and the appearance of more and more digital platforms for sustainable purposes to conduct online searches lead us to reflect more on the users’ behavioral intention with respect to search engines that support sustainable projects like water management projects. Another issue to consider is the factors that determine the adoption of such search engines. In the present study, we aim to identify the factors that determine the intention to adopt a search engine, such as Lilo, that favo

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Forest, Florent, Quentin Cochard, Cecile Noyer, et al. "Large-scale Vibration Monitoring of Aircraft Engines from Operational Data using Self-organized Models." Annual Conference of the PHM Society 12, no. 1 (2020): 11. http://dx.doi.org/10.36001/phmconf.2020.v12i1.1131.

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Vibration analysis is an important component of industrial equipment health monitoring. Aircraft engines in particular are complex rotating machines where vibrations, mainly caused by unbalance, misalignment, or damaged bearings, put engine parts under dynamic structural stress. Thus, monitoring the vibratory behavior of engines is essential to detect anomalies and trends, avoid faults and improve availability. Intrinsic properties of parts can be described by the evolution of vibration as function of rotation speed, called a vibration signature. This work presents a methodology for large-scal

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Dariusz Stanisław Sobolewski, Michał Amadeusz Sobolewski, Marek Juliusz Sobolewski, Joanna Paulina Sobolewska, and Natalia Julia Sobolewska. "New Generations of Rocket Engines." JOURNAL OF ADVANCES IN PHYSICS 17 (May 22, 2020): 322–46. http://dx.doi.org/10.24297/jap.v17i.8747.

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The article, based on mathematical model of the space and particles revealed in "Theory of Space" (Sobolewski D. S., Theory of Space, 2016) (Sobolewski D. S., Theory of Space, 2017) and the description of the propagation of photons stated in publication entitled “Geometry of the Dark Matter and Preliminary Analysis of Alpha and Beta Photons’ Properties Based on Theory of Space” (Sobolewski, Sobolewski i Sobolewski, 2017), describes transverse waves propagating in space, including gravitational, fluctuating and matter waves. In particular, it focuses on waves of matter in which orientation of t

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Zinenkov, Yu V. "Features of the mathematical modeling of gas turbine engines of indirect reaction." Vestnik UGATU 27, no. 4(102) (2023): 29–40. http://dx.doi.org/10.54708/19926502_2023_27410229.

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The article presents the developed mathematical model for calculating the parameters and characteristics of an indirect reaction gas turbine engine, which is implemented in asoftware environment and embedded in the general algorithm of the pro-gram "Calculation of traction-economic and mass-specific characteristics of a power plant and aircraft motion parameters". At the same time, special attention is paid to the features ofmathematical modeling of indirect reaction gas turbine engines with respect to turbojet engines. A description of a mathematical procedure for solving systems of nonlinear

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Liu, Long, Shihai Liu, Qian Xia, Bo Liu, and Xiuzhen Ma. "Numerical Investigation on Mixing Characteristics and Mechanism of Natural Gas/Air in a Super-Large-Bore Dual-Fuel Marine Engine." Atmosphere 13, no. 9 (2022): 1528. http://dx.doi.org/10.3390/atmos13091528.

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Premixed combustion mode dual-fuel (DF) engines are widely used in large-bore marine engines due to their great potential to solve the problem of CO2 emissions. However, detonation is one of the main problems in the development of marine engines based on the premixed combustion mode, which affects the popularization of liquefied natural gas (LNG) engines. Due to the large bore and long stroke, marine dual-fuel engines have unique flow characteristics and a mixture mechanism of natural gas and air. Therefore, the purpose of this study is to present a simulated investigation on the influence of

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Baranovskyi, Denys, Maryna Bulakh, Adam Michajłyszyn, Sergey Myamlin, and Leonty Muradian. "Determination of the Risk of Failures of Locomotive Diesel Engines in Maintenance." Energies 16, no. 13 (2023): 4995. http://dx.doi.org/10.3390/en16134995.

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This article presents a mathematical model of the risk of failures, depending on the operating parameters, of locomotive diesel engines. The purpose of this study is to determine the risk of failures of locomotive diesel engines in maintenance. The theory of probability and the theory of logic and reliability are used in this theoretical study. The innovations and main works are the first approaches to calculating the risk of failures of locomotive diesel engines by hourly fuel consumption, which, under operational conditions, allows for extending the life of locomotive diesel engines during m

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Myrhorod, Volodymyr, та Iryna Hvozdeva. "Методика наближеного синтезу регуляторів за умов забезпечення властивостей робастності". Aerospace Technic and Technology, № 4sup1 (24 серпня 2023): 58–63. http://dx.doi.org/10.32620/aktt.2023.4sup1.08.

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The subject of research – Methods, mathematical models, and methods of adjustment of regulators of automatic control systems with controlled changes in the state of power and energy installations based on gas turbine engines. The purpose of this study is to develop and apply a method of approximate synthesis of regulators with robustness properties, in particular, to the most important indicator of the quality of automatic control systems of gas turbine engines, namely stability reserves. The tasks faced by the developers consisted in analytically establishing the robustness conditions of gas

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Ahmed, Heersh, and Boris Osipov. "MULTI-MODE IDENTIFICATION OF OBTAINING THE ADEQUATE MODEL OF TURBOJET ENGINE TJ-100A-Z FOR DIAGNOSTICS BY THERMALGASDYNAMIC PARAMETERS." Perm National Research Polytechnic University Aerospace Engineering Bulletin, no. 60 (2020): 5–14. http://dx.doi.org/10.15593/2224-9982/2020.60.01.

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When monitoring and diagnosing the state of gas turbine engines by thermodynamic parameters, adequate mathematical models of these engines are used. This name means diagnostic methods based on special processing and analysis of the values of thermogasdynamic and other parameters measured on a working turbojet engine [1] using its mathematical model. The most important in the system of technical diagnostics is the mathematical model of the engine. Its creation is a problem since, as a rule, the specifications of engine components are not given in the technical documentation. In this regard, obt

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Molyakov, V. D., and B. A. Kunikeev. "Using the Similarity Theory in the Design of Gas Turbine Engines." Proceedings of Higher Educational Institutions. Маchine Building, no. 6 (735) (June 2021): 48–57. http://dx.doi.org/10.18698/0536-1044-2021-6-48-57.

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At present, in the promising development of gas turbine engines compared to at least the fourth generation products, there have been significant changes in the approaches to the design of engine. First of all, it is an increase in maximum values of temperature, gas pressure and circumferential flow speeds, an increase in power of the turbine stage, as well as improvement of the turbine manufacturing technology. All these factors lead to the fact that when designing the flow parts of the gas turbine, it is necessary at the fixed design flow rate of the working medium in the engine, i.e. at the

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Brian Kim Stefans. "Terrible Engines:." Comparative Literature Studies 51, no. 1 (2014): 159. http://dx.doi.org/10.5325/complitstudies.51.1.0159.

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Sadeeq, M. J., and S. R. M. Zeebare. "Semantic Search Engine Optimisation (SSEO) for Dynamic Websites: A Review." International Journal of Science and Business 5, no. 3 (2021): 148–58. https://doi.org/10.5281/zenodo.4536804.

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The billions of databases, worldwide, provide an increasing amount of information to the people. As a result, the researchers have to seek knowledge about the resources, which were generically known as the search engines. One such search technique that is popularly used is the semantic search technique which improves the search accuracy by determining the purpose of the search along with the contextual meaning of the terms which appeared in the data space or the web for generating accurate results. Many search engines exist today, which makes it difficult to collect useful data. In this paper,

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Varatalu, Ian Erik, Margus Veanes, and Juhan Ernits. "RE#: High Performance Derivative-Based Regex Matching with Intersection, Complement, and Restricted Lookarounds." Proceedings of the ACM on Programming Languages 9, POPL (2025): 1–32. https://doi.org/10.1145/3704837.

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We present a tool and theory RE# for regular expression matching that is built on symbolic derivatives, does not use backtracking, and, in addition to the classical operators, also supports complement, intersection and restricted lookarounds. We develop the theory formally and show that the main matching algorithm has input-linear complexity both in theory as well as experimentally. We apply thorough evaluation on popular benchmarks that show that RE# is over 71% faster than the next fastest regex engine in Rust on the baseline, and outperforms all state-of-the-art engines on extensions of the

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Alomari, Yazan, Marcia Baptista, and Mátyás Andó. "Integrating Network Theory and SHAP Analysis for Enhanced RUL Prediction in Aeronautics." PHM Society European Conference 8, no. 1 (2024): 15. http://dx.doi.org/10.36001/phme.2024.v8i1.4077.

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The prediction of Remaining Useful Life (RUL) in aerospace engines is a challenge due to the complexity of these systems and the often-opaque nature of machine learning models. This opaqueness complicates the usability of predictions in scenarios where transparency is crucial for safety and operational decision-making. Our research introduces the machine learning framework that significantly improves both the interpretability and accuracy of RUL predictions. This framework incorporates SHapley Additive exPlanations (SHAP) with a surrogate model and Network Theory to clarify the decision-making

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RUDZINSKYI, Volodymyr, Volodymyr LOMAKIN, Serhii MELNYCHUK, et al. "CHAOTIC BEHAVIOR IN THE ROTATIONAL SPEED OF INTERNAL COMBUSTION ENGINES." Scientific Journal of Silesian University of Technology. Series Transport 127 (June 1, 2025): 237–55. https://doi.org/10.20858/sjsutst.2025.127.14.

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This study investigates the chaotic behavior in the rotational speed of internal combustion engines. High-precision measurements of engine rotational speed were taken at discrete intervals of 0.36 degrees with time measured to a precision of 41 nanoseconds. The data was analyzed using various techniques from chaos theory and nonlinear dynamics, including Lyapunov exponent calculations, phase space reconstruction, and power spectral density analysis. Results reveal that engine rotational speed exhibits complex, chaotic behavior across different operating conditions. Lyapunov exponents ranged fr

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Shao, Ying Li. "A Study on the Acoustic Characteristics of the Counter-Phase Muffler." Applied Mechanics and Materials 130-134 (October 2011): 41–44. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.41.

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The exhaust noise, which falls into low-frequency noise, is the dominant noise source of a diesel engines and tractors. The traditional exhaust silencers, which are normally constructed by combination of expansion chamber, and perforated pipe or perforated board, are with high exhaust resistance, but poor noise reduction especially for the low-frequency band noise. For this reason, a new theory of exhaust muffler of diesel engine based on counter-phase counteracts has been proposed. The mathematical model and the corresponding experimental validation for the new exhaust muffler based on this t

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Shao, Ying Li. "A Study on Exhaust Muffler Using Counter-Phase Counteract." Advanced Materials Research 986-987 (July 2014): 810–13. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.810.

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The exhaust noise, which falls into low-frequency noise, is the dominant noise source of a diesel engines and tractors. The traditional exhaust silencers, which are normally constructed by combination of expansion chamber, and perforated pipe or perforated board, are with high exhaust resistance, but poor noise reduction especially for the low-frequency band noise. For this reason, a new theory of exhaust muffler of diesel engine based on counter-phase counteracts has been proposed. The mathematical model and the corresponding experimental validation for the new exhaust muffler based on this t

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Sevryugina, N. S., and A. S. Apatenko. "Research of influence of thermal loadings on reliability of gas-diesel engines of transport and technological machines." Power and Autonomous equipment 2, no. 3 (2019): 121–28. http://dx.doi.org/10.32464/2618-8716-2019-2-3-121-128.

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Introduction: the factors determining the development trends of the machine-building industry on the example of modernization of the internal combustion engine are considered. The evaluation of the effectiveness of cooperation between manufacturers and the scientific potential of leading scientists in the development of designs of gas-diesel engines. The requirement of time of increase of ecology of internal combustion engines is proved, the reasons braking mass introduction of gas-diesel engines for transport and technological cars are revealed. The parameter of influence on the thermal load

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Weinberg, Jonathan M. "Attentional Engines: A Perceptual Theory of the Arts." Journal of Aesthetics and Art Criticism 80, no. 1 (2021): 121–24. http://dx.doi.org/10.1093/jaac/kpab069.

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Ułanowicz, Leszek, Paweł Szczepaniak, and Grzegorz Jastrzębski. "Reverse engineering modeling of jet turbine engine blade ring palisade geometry." Journal of Konbin 54, no. 4 (2024): 135–58. https://doi.org/10.5604/01.3001.0054.9319.

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When designing small turbine jet engines for UAVs, the theory of geometric similarity of components made at different scales can be used. This allows determining how an engine component designed at a macro scale can be recreated at a micro scale. The idea of the process of modeling the palisade of turbine blade rings of a UAV jet engine together with its rotor and nozzle blades, based on reverse engineering, is presented. The methodology for reproducing the geometry of turbine blade rings together with their rotor and nozzle blades of a turbine jet engine is presented. The tools for removing t

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Gavkalyuk, Bogdan, and Vladimir Lozhkin. "ENSURING FIRE SAFETY OF COMPLEX ELECTRONICALLY CONTROLLED THERMOCATALYTIC SYSTEMS OF INTERNAL COMBUSTION ENGINES: THEORETICAL FOUNDATIONS, DIAGNOSTICS." NATURAL AND MAN-MADE RISKS (PHYSICO-MATHEMATICAL AND APPLIED ASPECTS) 2023, no. 4 (2024): 15–22. http://dx.doi.org/10.61260/2307-7476-2024-2023-4-15-22.

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The article is devoted to the theory and practice of diagnosing fire and emergency modes of operation of piston engines with neutralizers as part of vehicles with electronic and digital control of fuel supply processes. The concept of the work is multidisciplinary, updated on the analysis of problems of global environmental sustainability, fundamental and applied research on the kinetics and energy dynamics of the generation of useful and flammable excess heat in engines and neutralizers during the combustion of fuel hydrocarbons. Gorenje The paper proposes a diagnostic method based on instrum

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Alicki, Robert, David Gelbwaser-Klimovsky, and Alejandro Jenkins. "The Problem of Engines in Statistical Physics." Entropy 23, no. 8 (2021): 1095. http://dx.doi.org/10.3390/e23081095.

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Engines are open systems that can generate work cyclically at the expense of an external disequilibrium. They are ubiquitous in nature and technology, but the course of mathematical physics over the last 300 years has tended to make their dynamics in time a theoretical blind spot. This has hampered the usefulness of statistical mechanics applied to active systems, including living matter. We argue that recent advances in the theory of open quantum systems, coupled with renewed interest in understanding how active forces result from positive feedback between different macroscopic degrees of fre

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