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Готові списки джерел за темами / Rational selection of parameters / Статті в журналах

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Статті в журналах з теми "Rational selection of parameters"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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1

Kharlamov, Y., L. Lopata, Y. Brusilo, and M. Holovashuk. "The selection and development of tribological coating." Problems of tribology 102, no. 4 (December 24, 2021): 68–74. http://dx.doi.org/10.31891/2079-1372-2021-102-4-68-74.

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The strategy and methodology for selecting of optimal surface treatment for a given tribological application are the main objectives of study. The classification of main methods of coating processes and surface modification is given. The scheme of development of operation technology of surface treatment and coating deposition is proposed. The main initial data: the structure of tribological system (TrS); individual properties of TrS parts; lubricant properties; method of lubrication of TrS parts; properties of surrounding environment; external influences on TrS; technological limitations on TrS parts treatment; managerial and economical limitations. The selection of surface technology method is including the next successive steps: the preliminary analysis of TrS part interaction; development of models of friction and wear process of TrS parts; the choice of rational values of parameters of surface layers of TrS parts; the choice of rational composition and structure parameters of surface layers of TrS parts; the choice of rational technological route and methods of surface treatment of TrS parts; the experimental examination of surface strengthened materials and TrS and correction of surface treatment technology

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2

Soldatenko, Andrey, Hong Rui Ao, Hong Yuan Jiang, and Alexander Danilov. "Selection Methods of Rational Parameters of Core-Drill Working Tools." Applied Mechanics and Materials 220-223 (November 2012): 748–52. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.748.

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The paper presents the results of experiments in a circle drilling. Namely, the results of data processing load on the cutter (blade) moving in a certain radius, with step-checkboarded and sequential circuits of arrangement on the crown of ring bore. The paper presents the stresses of this incisor, with the two constellations, their relationship to each other. As a result, the conclusions brought under any scheme of arrangement of cutting elements are obtained by the least energy-intensive process.

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3

Ca��n-Tapia, Edgardo. "Anisotropy of magnetic susceptibility parameters: Guidelines for their rational selection." Pure and Applied Geophysics PAGEOPH 142, no. 2 (1994): 365–82. http://dx.doi.org/10.1007/bf00879310.

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4

Yagubov, V. F., A. G. Strelkov, and A. A. Kotrovskiy. "Selection of rational parameters of electromechanical transmissions of tracked vehicles." Traktory i sel hozmashiny 81, no. 11 (November 15, 2014): 36–39. http://dx.doi.org/10.17816/0321-4443-65511.

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Data obtained from an experimental research of electric drive with molecular energy storage permits to conclude that using of the capacitive storage as a part of electromechanical transmission is appropriate. Proposals concerning organization of automated system of motion control for a tracked vehicle equipped with electromechanical transmission using molecular energy storage are developed.

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5

Hetman, H. K., and S. L. Marikutsa. "SELECTION OF RATIONAL PARAMETERS OF THE NOMINAL MODE OF ELECTRIC LOCOMOTIVES." Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport, no. 1(67) (February 10, 2017): 96–105. http://dx.doi.org/10.15802/stp2017/92615.

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6

Kladko, N. "Selection of rational parameters of axleboxes with a conic roller bearing." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" 34 (December 2019): 137–45. http://dx.doi.org/10.32703/2617-9040-2019-34-1-11.

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7

Aripov, Nazirjhon M., Daurenbek I. Ilesaliev, Jamshid R. Kobulov, and Shahboz R. Abduvahitov. "Research and selection of rational parameters of a refrigerated container terminal." Innotrans, no. 3 (2021): 32–38. http://dx.doi.org/10.20291/2311-164x-2021-3-32-38.

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The article considers the role of transport and refrigerated warehouse complexes in continuous refrigerating supply chains (CRSCs). A summary diagram of technical and technological support is formed, describing the relationship and mutual influence of the elements of the CRSC system. A structural and parametric description of a refrigerated container terminal is carried out. The classification of the parameters of a refrigerated container terminal according to various characteristics is developed. The relationships between the parameters of a refrigerated container terminal are presented in the form of mathematical models. The dependence of the capacity of a refrigerated container terminal with respect to the length of a site is obtained.

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8

Hu, Feng, Chuan Tong Wang, Yu Chuan Wu, and Liang Zhi Fan. "Parameters Selection of LLE Algorithm for Classification Tasks." Advanced Materials Research 1037 (October 2014): 422–27. http://dx.doi.org/10.4028/www.scientific.net/amr.1037.422.

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The crux in the locally linear embedding algorithm or LLE is the selection of embedding dimensionality and neighborhood size. A method of parameters selection based on the normalized cut criterion or Ncut for classification tasks is proposed. Differing from current techniques based on the neighborhood topology preservation criterion, the proposed method capitalizes on class separability of embedding result. By taking it into consideration, the intrinsic capability of LLE can be more faithfully reflected, and hence more rational features for classification in real-life applications can be offered. The theoretical argument is supported by experimental results from synthetic and real data sets.

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9

Aldoshin, N. V., I. N. Kravchenko, N. A. Lylin, and M. A. Mosyakov. "SELECTION METHODOLOGY OF RATIONAL CONSTRUCTION AND TECHNOLOGICAL PARAMETERS FOR COMBING WORK MEMBER." REPAIR RECONDITIONING MODERNIZATION, no. 4 (2020): 40–44. http://dx.doi.org/10.31044/1684-2561-2020-0-4-40-44.

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10

KHONDOSHKO, YULIA VLADIMIROVNA. "INCREASING ENERGY EFFICIENCY AND SELECTION OF RATIONAL OPERATION PARAMETERS OF BOILER UNITS." Messenger AmSU, no. 95 (2021): 74–77. http://dx.doi.org/10.22250/jasu.95.16.

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The article deals with the main problems of boiler houses operating on solid low-grade fuel. The ways of increasing energy efficiency and methods of more rational use of the existing boiler equipment are proposed.

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11

Cao, Yan, Sen Cao, Yu Bai, and Xiao Fei Yang. "CBR-Based Cutting Parameter Selection System and Searching Algorithm for Metal Machining Operations." Advanced Materials Research 710 (June 2013): 554–57. http://dx.doi.org/10.4028/www.scientific.net/amr.710.554.

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At present, most factories choose cutting parameters only depending on experience or handbooks in production. To improve the intelligent level of cutting parameter selection, Case-Based Reasoning (CBR) is used to search rational cutting parameters. The structure of a CBR-based cutting parameter selection system is presented and its functional modules are discussed. CBR-based cutting parameter selection system is mainly composed of case base management system, cutting parameter database management system, application, interface, etc. A complete case is composed of four parts, i.e., objectives, initial conditions, constraints and results. The system adopts hierarchical searching method in combination with nearest neighbor method. It provides a scientific approach for selecting cutting parameters in actual production.

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12

Poghosyan, Arnak V., and Tigran K. Bakaryan. "Optimal Rational Approximations by the Modified Fourier Basis." Abstract and Applied Analysis 2018 (2018): 1–21. http://dx.doi.org/10.1155/2018/1705409.

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We consider convergence acceleration of the modified Fourier expansions by rational trigonometric corrections which lead to modified-trigonometric-rational approximations. The rational corrections contain some unknown parameters and determination of their optimal values for improved pointwise convergence is the main goal of this paper. The goal was accomplished by deriving the exact constants of the asymptotic errors of the approximations with further elimination of the corresponding main terms by appropriate selection of those parameters. Numerical experiments outline the convergence improvement of the optimal rational approximations compared to the expansions by the modified Fourier basis.

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13

Lanets, Oleksii, Volodymyr Borovets, Pavlo Maistruk, and Iryna Derevenko. "SUBSTANTIATION OF RATIONAL SELECTION OF MOTOR-VIBRATORS VIBRATION MACHINES." Vibrations in engineering and technology, no. 3(94) (November 26, 2019): 24–32. http://dx.doi.org/10.37128/2306-8744-2019-3-4.

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An integral component in the calculation of vibration machines is the establishment of drive power necessary to set in motion an oscillating system with specified characteristics. However, difficulties often arise at this stage. The inertial characteristics of the drive directly affect the power consumption. Therefore, when calculating it, you must already know the size of the drive, which is still unknown, since it is only being installed. This question is especially relevant for low-frequency oscillatory systems with an inertial drive, in which the inertial parameters of the drive are proportional to the masses of the oscillatory systems. In such oscillatory systems, ignoring the mass of the drive when setting the consumed power to set the mechanical oscillating system in motion can lead to the fact that the vibrating machine will not be able to provide the expected (calculated) technical and technological parameters, since the massive drive oscillates with the whole system, will take on its own propulsion a significant proportion of the energy. The article justifies the analytical relation¬ships for calculating the power of vibration machines with inertial drive, taking into account the mass of vibrator motors. For this, systems of equations are solved that interconnect analytical expressions for calculating the powers necessary to bring the oscillatory systems into motion, taking into account the mass of vibrator motors. The solution to such systems is the value of the required drive power (vibrator motors) and its mass, which is already consistent with the masses of unified vibrator motors produced by manufacturers. The obtained analytical dependences make it quite easy to determine the power of the drives in one-, two- and trimass oscillation systems of vibration machines with an inertial drive. Using the formulas obtained in the article, it is possible to precisely establish the necessary drive power to set the oscillatory system in motion and uniquely select the mass of the vibrator motor.

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14

Savochkin, V. A., V. M. Sharipov, I. A. Smirnov, S. M. Shishanov, and L. I. Tarasova. "Method for selection of rational parameters of suspension system of high-speed tracked vehicle." Traktory i sel hozmashiny 82, no. 3 (March 15, 2015): 12–18. http://dx.doi.org/10.17816/0321-4443-65410.

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15

Nechyporenko, V., V. Salo, P. Litovchenko, A. Horbunov, and D. Bosyk. "SELECTION CRITERION OF RATIONAL VALUES OF PARAMETERS OF INTERFERENCE FIT IN AUTOMATED DESIGN." Collection of scientific works of the National Academy of the National Guard of Ukraine 1, no. 35 (2020): 13–20. http://dx.doi.org/10.33405/2409-7470/2020/1/35/207352.

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16

Biryukov, A. B. "Methodologies of heat calculation and selection of rational parameters of regenerative burners operation." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 77, no. 5 (May 26, 2021): 564–71. http://dx.doi.org/10.32339/0135-5910-2021-5-564-571.

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Decrease of energy intensity of products is an actual task for all the industries, including steel industry. One of the best solutions to increase energy efficiency of heating facilities is application of recuperative and regenerative burners, which ensure high temperature of air heating. Such high temperatures cannot be achieved at application of heating systems based on central recuperator. It was shown that many countries accomplish studies to perfect recuperative burners and simulation of their thermal operation. However at present there are no universally recognized methodologies of calculation and designing of such equipment. Results of studies presented, which were implemented in three methodologies intended for heat calculation and selection of rational parameters of regenerative burners operation. The methodologies enable also to determine a fuel utilization coefficient for a furnace system based on regenerative burners, to estimate competitiveness of solutions at creation new and modernization existing furnaces comparing with utilization of modern central recuperators. Comparative simplicity of the mathematical apparatus used in the methodologies highlighted, as well as correspondence of the used calculated expressions to the physical nature of the processes taking place. Besides, the methodologies enable during calculation to set the values of important characteristics, which can be reached based on determination of values of basic structure parameters of lining. A scheme of joint application of the elaborated methodologies proposed.

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17

Guskov, Valery Vladimirovich, and Aleksandr Sergeyevich Povarekho. "SELECTION OF RATIONAL PARAMETERS FOR THE WHEEL DRIVE OF MULTI-AXLE WHEELED VEHICLES." Вестник Белорусско-Российского университета, no. 3 (2019): 28–35. http://dx.doi.org/10.53078/20778481_2019_3_28.

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18

Mokhnatkin, V. G., A. S. Filinkov, and P. N. Solonshchikov. "Selection of rational parameters for feeding device of installation for feed mixtures preparation." Traktory i sel hozmashiny 82, no. 4 (April 15, 2015): 45–47. http://dx.doi.org/10.17816/0321-4443-65457.

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The article considers the efficiency of feeding device of installation for mixtures preparation. Related tests estimating the quality of feeding device are carried out, parameters of obtained mixture are defined.

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19

Sidorov, K. M., and B. N. Sidorov. "Definition of parameters of main components of a vehicle power plant." Izvestiya MGTU MAMI 9, no. 2-1 (January 20, 2015): 122–28. http://dx.doi.org/10.17816/2074-0530-67267.

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The article deals with definition and calculation of characteristics of the main components of vehicle power plants, it presents principles for selection of rational characteristics of the internal combustion engine and components of traction electrical system in a hybrid power plant, there are expressions for estimation of the parameters.

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20

Kovalyov, Yuri, Sergey Pleshko, and Evgeny Lopukhov. "DYNAMIC LOAD REDUCTION DEVICE IN MACHINE DRIVE WITH SPRING AND SELECTION OF ITS PARAMETERS." HERALD OF KHMELNYTSKYI NATIONAL UNIVERSITY 297, no. 3 (July 2, 2021): 87–93. http://dx.doi.org/10.31891/2307-5732-2021-297-3-87-93.

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The peculiarity of the technological equipment of light industry is the significant dynamic loads that occur during unstable operating modes and is one of the main reasons for reducing the reliability and durability of its operation. The problem of increasing the reliability and durability of their work by reducing the dynamic loads is relevant, because the known means of reducing the dynamic loads in the drive of machines can not always be used in light industry machines. Therefore, when designing light industry equipment, first of all, attention should be paid to reducing the dynamic loads in the drive and preventing accidents. The paper considers the feasibility of using a device with a torsion spring to reduce the dynamic loads in the drive of process equipment, check its performance and develop a method for selecting rational parameters. In the course of work modern methods of researches of mechanical systems are used for the purpose of an estimation of expediency of use of the device with a torsion spring for reduction of starting dynamic loadings in the drive of machine. On the basis of the analysis of features of work of the technological equipment of light industry the expediency of use in the drive of cars of the gear safety coupling with a torsion spring is established. A new design of the device is proposed to reduce the dynamic loads that occur during machine start-up. Unlike the known devices, the proposed device is made in the form of a toothed safety clutch with a torsion spring, which simplifies its design and increases efficiency. The use of a cylindrical torsion spring as an elastic element, which connects the half-clutch to the flange on which the satellite gears are mounted, prevents overloading of the drive and the choice of rational rigidity of the device depending on the change of operation, which increases its durability and expands performance. The method of checking the efficiency of the device for reducing dynamic loads and selecting its rational parameters is presented. The scientific novelty is the development of scientific bases and engineering methods of designing devices to reduce dynamic loads in the drive of technological equipment. The practical significance lies in the development of a new design of the device to reduce the dynamic loads in the drive of machines and the engineering method of choosing its rational parameters.

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21

Hetman, H. K., and S. L. Marikutsa. "SELECTION OF RATIONAL PARAMETERS OF THE NOMINAL MODE ELECTRIC TRAINS WITH ASYNCHRONOUS TRACTION DRIVE." Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport, no. 3(69) (June 20, 2017): 56–65. http://dx.doi.org/10.15802/stp2017/104767.

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22

Tilloev, K. Z., E. I. Kromsky, and S. V. Kondakov. "Selection of rational parameters of the cone roller for deep compaction of road bases." Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta 7, no. 1 (March 25, 2021): 82–89. http://dx.doi.org/10.22281/2413-9920-2021-07-01-82-89.

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The article is devoted to the method of designing a cone roller for deep compaction of soil used as the working body of a crawler excavator. One of the most important design parameters of a cone roll is the angle of the cone. Known methods allow determining the cone angle for other technological tasks, for example, for loosening frozen soil, and cannot be directly applied to solve the problem. The authors propose an original method for selecting rational parameters of a cone roller head, including the angle of the cone. The method uses a mathematical model of the interaction of a cone roller with compacted soil. In the process of solving the mathematical model are the following parameters: the dependence of the area of the lateral surface of a cone, the dependence of the volume of displaced soil on the contact surface of the cone from the contact patch, the total force, cone force acting on the ground torsional, and axial force in the implementation of the cone, applied by the excavator boom. To identify the optimal value of the cone angle, the function of the volume of displaced soil from the cone angle and the axial force during penetration from the cone angle was studied. As a result, it is determined that the optimal angle of the cone is 240, which will provide the greatest efficiency according to the performance / cost criterion.

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23

Бурмистрова and Olga Burmistrova. "INFLUENCE OF OPERATIONAL PARAMETERS OF ROADS ON THE ECOSYSTEM ROADSIDE." Modeling of systems and processes 8, no. 2 (October 7, 2015): 58–60. http://dx.doi.org/10.12737/13448.

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This article examines the role of roads in view of the existing negative impact on the environment. So far, the selection of a rational variant of the road network is focused on traditional techno-economic approach. Therefore, there is need to develop environmental criteria in relation to which the costs will be shown to act as indicators of capacity constraints volumes of material and transport flows.

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24

Li, Shu, Yiwei Tian, David S. Jones, and Gavin P. Andrews. "Optimising Drug Solubilisation in Amorphous Polymer Dispersions: Rational Selection of Hot-melt Extrusion Processing Parameters." AAPS PharmSciTech 17, no. 1 (January 4, 2016): 200–213. http://dx.doi.org/10.1208/s12249-015-0450-6.

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25

Kalenskii, Sergei M., Tat'yana A. Morzeeva, Yurii A. Ezrokhi, and Sergei V. Pankov. "SELECTION OF RATIONAL PARAMETERS OF DISTRIBUTED PROPULSION SYSTEM IN STRUCTURE OF THE LONG RANGE AIRCRAFT." Vestnik Moskovskogo aviatsionnogo instituta 29, no. 1 (2022): 95–108. http://dx.doi.org/10.34759/vst-2022-1-95-108.

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26

Zou, Le, Liangtu Song, Xiaofeng Wang, Yanping Chen, Chen Zhang, and Chao Tang. "Bivariate Thiele-Like Rational Interpolation Continued Fractions with Parameters Based on Virtual Points." Mathematics 8, no. 1 (January 2, 2020): 71. http://dx.doi.org/10.3390/math8010071.

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The interpolation of Thiele-type continued fractions is thought of as the traditional rational interpolation and plays a significant role in numerical analysis and image interpolation. Different to the classical method, a novel type of bivariate Thiele-like rational interpolation continued fractions with parameters is proposed to efficiently address the interpolation problem. Firstly, the multiplicity of the points is adjusted strategically. Secondly, bivariate Thiele-like rational interpolation continued fractions with parameters is developed. We also discuss the interpolant algorithm, theorem, and dual interpolation of the proposed interpolation method. Many interpolation functions can be gained through adjusting the parameter, which is flexible and convenient. We also demonstrate that the novel interpolation function can deal with the interpolation problems that inverse differences do not exist or that there are unattainable points appearing in classical Thiele-type continued fractions interpolation. Through the selection of proper parameters, the value of the interpolation function can be changed at any point in the interpolant region under unaltered interpolant data. Numerical examples are given to show that the developed methods achieve state-of-the-art performance.

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27

Mokritskii, Boris Y., Dmitriy A. Pustovalov, Alexey Anatolevich Vereschaka, Anatoliy Stepanovich Vereschaka, and A. D. Verhoturov. "Evaluation of Efficiency of Edge Tool on the Basis of New Technique for Analyzing Parameters of Scribing Mark." Applied Mechanics and Materials 719-720 (January 2015): 96–101. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.96.

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Experimental comparative evaluation of cutting properties of edge tools underspecified operating conditions is undesirable, since it takes a lot of time and expenses. The need for development of simulation techniques is clear, and the above techniques can be the basis for the classification of compared edge cutting tools on their most appropriate features and for the selection of the most rational type of such a tool using a technique of nondestructive testing. The analysis of the studies in the field of evaluation of the cutting tool properties by nondestructive testing techniques as well as our own experience of developing similar techniques suggest that such a technique could be developed on the basis of the pendulum scribing technique. Thus, the objective of this study was to develop procedures for the selection of rational parameters of edge cutting tools for specified machining conditions based on simulating a low-cost process.The study was supported by grant No. 9.251.2014/K, project code 251.

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28

Bruhn, Jörgen, Thomas W. Bouillon, Andreas Hoeft, and Steven L. Shafer. "Artifact Robustness, Inter- and Intraindividual Baseline Stability, and Rational EEG Parameter Selection." Anesthesiology 96, no. 1 (January 1, 2002): 54–59. http://dx.doi.org/10.1097/00000542-200201000-00015.

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Background Artifact robustness (i.e., size of deviation of an electroencephalographic parameter value from baseline caused by artifacts) and baseline stability (i.e., consistency of median baseline values) of electroencephalographic parameters profoundly influence electroencephalography-based pharmacodynamic parameter estimation and the usefulness of the processed electroencephalogram as measure of the arousal state of the central nervous system (depth of anesthesia). In this study, the authors compared the artifact robustness and the interindividual and intraindividual baseline stability of several univariate descriptors of the electroencephalogram (Shannon entropy, approximate entropy, spectral edge frequency 95, delta ratio, and canonical univariate parameter). Methods Electroencephalographic data of 16 healthy volunteers before and after administration of an intravenous bolus of propofol (2 mg/kg body weight) were analyzed. Each volunteer was studied twice. The baseline electroencephalogram was recorded for a median of 18 min before drug administration. For each electroencephalographic descriptor, the authors calculated the following: (1) baseline variability (= (median baseline - median effect) [i.e., signal]/SD baseline [i.e., noise]) without artifact rejection; (2) baseline variability with artifact rejection; and (3) baseline stability within and between individuals (= (median baseline - median effect) averaged over all volunteers/SD of all median baselines). Results Without artifact rejection, Shannon entropy and canonical univariate parameter displayed the highest signal-to-noise ratio. After artifact rejection, approximate entropy, Shannon entropy, and the canonical univariate parameter displayed the highest signal-to-noise ratio. Baseline stability within and between individuals was highest for approximate entropy. Conclusions With regard to robustness against artifacts, the electroencephalographic entropy parameters and the canonical univariate parameter were superior to spectral edge frequency 95 and delta ratio. Electroencephalographic approximate entropy displayed the best interindividual and intraindividual baseline stability.

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29

Tang, Xiao Yan. "Bit Selection of Carbonate Formation Based on Fuzzy Clustering Method." Advanced Materials Research 756-759 (September 2013): 4520–24. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.4520.

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Анотація:

t is important to increase drilling speed and reduce drilling costs that select the rational bit. A common method is used to select bit types based on the rock mechanical parameters of the drillability. The rock mechanical parameters which are the compressive strength, shear strength, rock hardness and abrasiveness have been not considered during select bit types of carbonate formation, so that the selected bit types are not practical. The rock mechanical parameters of indoor test are costly, and the data points are not continuous. In view of this, these rock mechanical parameters are calculated using logging data that reflect the rich rock mechanical properties. Combined with the manufacturers instructions of bit types, these rock mechanics parameters were clustered using fuzzy clustering method, and then the bit types are selected according to the clustering results. This method was applied to the bit selection of carbonate formation in the eastern of Sichuan, the results show that this method can effectively select bit types of the carbonate section.

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30

Cao, Yan, Xue Jiao Dong, and Jiang Du. "Optimal Selection of Cutting Parameters in Blade NC Machining Based on BP Neural Network and Genetic Algorithm." Applied Mechanics and Materials 496-500 (January 2014): 1539–42. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.1539.

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Blades are important components of aircraft engines. Free-form surface blade machining generally adopts sub-regional processing and cutting parameters vary greatly. Rational optimization of the cutting parameters can improve blade processing quality and efficiency in aerospace industry. To control the processing deformation of the blades, a method using artificial neural network and genetic algorithm is presented to optimize the cutting parameters. The method can reduce cutting parameter selection time and improve blade processing quality.

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31

Rashkivskiy, Volodymyr, Maksym Balaka, and Oleksandr Teteriatnyk. "Selection and calculation of main parameters for loader bucket with side unloading." Gіrnichі, budіvelnі, dorozhnі ta melіorativnі mashini, no. 98 (December 30, 2021): 37–44. http://dx.doi.org/10.32347/gbdmm2021.98.0401.

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Анотація:

Single-bucket front loaders are usedwidelyin road construction. In some cases, their use is more rational than traditional digging and earth-moving machines.Front loaders have a high-er bucket capacity per unit weight, high maneuver-ability and lower operating costs compared to sin-gle-bucket excavators. This allowsyou to develop grounds in small bottoms without compromising productivity.Improvement of the loader use effectiveness throughout the year can be achieved by armory it with replaceable working equipment.The existent working equipment range contains buckets for various purposes (main, reduced, enlarged, with forced unloading, frame, two-jaw, with side un-loading,etc.).The bucket design with side unloading, calcula-tion of its main parameters and control system are presented in paper.The loader with such replacea-ble working equipment can be used in construction during loading and unloading operations, in the mining industry, and as mechanized detachments part of the Ministry of Emergency Situations dur-ing emergency recovery operations.

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32

Aripov, N. M., D. I. Ilesaliev, F. K. Azimov, and G. R. Ibragimova. "Determination of rational values of the parameters of the container depot." Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta 7, no. 4 (December 25, 2021): 418–31. http://dx.doi.org/10.22281/2413-9920-2021-07-04-418-431.

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Анотація:

Today, due to the increase in rail freight traffic, there is a shortage of containers, and the issue of shortage of containers has not been resolved for a long time. This substantiates the practical relevance of the study of container depots in railway transport. Another task is the development of mathematical models of the interconnection of the parameters of the container depot. Currently, there are several different methods and methods for calculating and determining the parameters of container sites, the analysis of which is given in the article. However, there is a need to supplement, clarify and unify the existing methods for calculating all kinds of parameters for a container depot, which justifies the theoretical relevance of the study. Connections with which the purpose of the article is to develop a methodology for the reliable determination of the most rational values of the parameters of the container terminal, thereby improving and increasing the level of customer service in transport in general. Research methods are based on a systematic analysis and generalization of existing methods and methods for calculating the capacity of container depots. The results of the study are presented by the developed methodology for determining the capacity of warehouses on railway transport, which provides a more qualified calculation and selection of container depot parameters, as well as a decrease in erroneous design decisions and an increase in the reliability of projects for the development and improvement of railway transport and the transport network as a whole.

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33

Alruwaili, Abdulmohsen D., Aly R. Seadawy, Syed T. R. Rizvi, and Sid Ahmed O. Beinane. "Diverse Multiple Lump Analytical Solutions for Ion Sound and Langmuir Waves." Mathematics 10, no. 2 (January 10, 2022): 200. http://dx.doi.org/10.3390/math10020200.

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Анотація:

In this work, we study a time-fractional ion sound and Langmuir waves system (FISLWS) with Atangana–Baleanu derivative (ABD). We use a fractional ABD operator to transform our system into an ODE. We investigate multiwaves, periodic cross-kink, rational, and interaction solutions by the combination of rational, trigonometric, and various bilinear functions. Furthermore, 3D, 2D, and relevant contour plots are presented for the natural evolution of the gained solutions under the selection of proper parameters.

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34

Akimov, A. P., Yu V. Konstantinov, D. I. Fedorov, and I. N. Akvilyanova. "Selection of rational parameters for blade rotary working organ on the basis of its kinematic analysis." Traktory i sel hozmashiny 82, no. 1 (January 15, 2015): 36–39. http://dx.doi.org/10.17816/0321-4443-65498.

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Анотація:

On the basis of kinematic analysis of blade rotary working organ, dependencies of cutting angle of arbitrary surface element of blade on rotation angle of working organ and on its operation mode are determined. Recommendations for selection of working organ parameters are given, in order to decrease in specific energy consumption on soil treatment and to improve its quality.

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35

Стародубцев, V. Starodubtsev, Фарафонов, and A. Farafonov. "ALGORITHM DEVELOPMENT OF THE OF CONSTANTLY OPERATING MATHEMATICAL MODELS FOR QUALITY CONTROL OF UNIVERSITY STUDENTS’ KNOWLEDGE." Modeling of systems and processes 7, no. 2 (October 30, 2014): 40–44. http://dx.doi.org/10.12737/6080.

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Анотація:

Developed upgraded combinatorial algorithm of group method of data handling (GMDH) to identify the target functions of students’ knowledge quality (SKQ), which implements a rational calculation process with the estimation procedure of independent parameters and order of external criteria application for the optimal models selection

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36

Korol, Elena, and Maksim Sadkovskiy. "INVESTIGATION OF TECHNOLOGICAL PARAMETERS OF THE DEVICE AND REPAIR OF THE BASES OF FLAT ROOFING." Construction and Architecture 9, no. 3 (October 29, 2021): 31–35. http://dx.doi.org/10.29039/2308-0191-2021-9-3-31-35.

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Анотація:

In the practice of modern construction, light concretes of low thermal conductivity are used as a thermal insulation layer of enclosing structures. In particular, they are used for insulation of flat roofs of buildings for various purposes. One of their effective methods of thermal insulation is the use of polystyrene concrete of low average density and thermal conductivity directly in building conditions. Studies have established the rational selection of the composition of this type of concrete for the device of a monolithic thermal insulation layer, the resource support of the technological process, including the mechanization of work and qualification requirements for performers. The improvement of organizational and technological solutions of flat roofs based on the choice of rational parameters of technological processes and operations ensures a reduction in the complexity, duration and cost of work on the construction site.

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37

Feng, Xue, Li Jie Zhao, and Yu Chen Zhang. "Experimental Platform for Feature Selection of Signal of Ball Mill." Applied Mechanics and Materials 263-266 (December 2012): 412–15. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.412.

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Анотація:

Ball mill load monitoring and rational parameters setting are important to ensure the ball mill long-term stable operation. Although vibration and acoustic signal of shell contain plenty of information about mill load, it is difficult to select the feature of them in time domain. Due to the high dimensionality and colinearity, models based on frequency spectrum are complex and with a low generalization and the irrelevant spectral variables deteriorate their quality. This paper use Synergy Interval Partial Least-Squares Regression(SiPLS) to select the feature frequency bands of vibration and acoustical, which are directly relevant to the parameters of ball mill load, and build effective prediction models. The experimental platform combines the strengths of MATLAB with the benefits of C#.net to implement the functions of frequency feature selection, feature modeling and load parameters prediction. Test results show that the platform selects the frequency spectrum feature effectively, and the generalization of mill load models are improved.

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38

Qin, Jian Jun, Yan An Yao, and Jian Wei Yang. "A User-Engineering Design Interaction Supporting Rational Product Cooperative Design." Applied Mechanics and Materials 155-156 (February 2012): 51–55. http://dx.doi.org/10.4028/www.scientific.net/amm.155-156.51.

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To input rational customer requirements into engineering design process more effectively and improve product design quality and market response efficiency, this paper focuses on the interaction between market analysis and engineering design decision for the modular product. While many researchers have successful evaluated and optimized the design schemes, few, if any, have provided a bridge the customer selection and firms product development decision. After a review of the literature we introduce the flow of user-engineering design interaction including both maximize the utility of customer and the profit of the firm. On the user and market analysis flow, customer requirements are defined according to the target market, then the customer selection possibility link to the product attributes by utility function. Accordingly, the alternatives are corresponding to the module different product, and then using decision support problem method to search the optimal design parameters. Two design domains can share the design information and realize the cooperative design process by computer computing platform.

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39

Wang, Rui, Wu Zhao, Cunjing Luo, Zhiyong Wang, and Tao Luo. "An Intelligent Tool Selection System Based on CRB and RBR." Open Mechanical Engineering Journal 8, no. 1 (December 31, 2014): 795–802. http://dx.doi.org/10.2174/1874155x01408010795.

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Анотація:

The manufacturing industries dealing with machining and tools' manufacturing generate a large amount of data concerning the machining process. However, in most cases, this information is not used efficiently as there is no system dedicated for storing and manipulating such data. In order to use these data to improve the efficiency and increase the benefit of machining, the cutting database system is built for these manufacturing enterprises, which can provide rational cutting parameters and tool solutions. JAVA and MYSQL are used as the base of database management system, combining XML and JavaScript technology. The intelligent tool selection model was designed, and the functions of basic information management and query were realized. It was concluded that it can commend reasonable cutting parameters and tool solutions according to machining condition input.

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40

Ferregut, Carlos. "Cluster analysis as a tool in the classification of structures for safety differentiation." Canadian Journal of Civil Engineering 15, no. 4 (August 1, 1988): 601–8. http://dx.doi.org/10.1139/l88-081.

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Анотація:

Different structures and different structural members should reasonably be assigned different levels of reliability to obtain optimum structural performance. This differential assignment of reliabilities or safety parameters is called "safety level differentiation." Up to the present, no simple practical rationale is available for the selection of safety levels. This paper presents a methodology for the selection of safety levels. Cluster analysis is suggested as a tool in the calibration of limit states design codes. The technique may be used to develop importance factors for the design loadings and resistances, reflecting the difference in consequences of failure. The cluster analysis serves to classify a structure according to various attributes that together reflect its social and economic importance. For code specification purposes, it is fundamental to identify which structures in a set are similar, because it facilitates the specification of a single set of code parameters for each structural type, and permits a more rational selection of importance factors. The acceptable number of structural types and the effect of weighing the attributes are also discussed. Some of the new concepts are illustrated using a sample of highway bridges in southwestern Ontario. Key words: safety differentiation, reliability, cluster analysis, code calibration, bridge classification.

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41

Sysoev, Nikolaj. "JUSTIFICATION OF THE STRUCTURE AND SELECTION OF RATIONAL DESIGN PARAMETERS OF DRILLING BIT, REINFORCED POLYCRYSTALLINE DIAMOND CUTTERS." University News. North-Caucasian Region. Technical Sciences Series, no. 2 (June 2016): 77–83. http://dx.doi.org/10.17213/0321-2653-2016-2-77-83.

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42

Noureldin, A. Samy, Essam Sharaf, Abdulrahim Arafah, and Faisal Al-Sugair. "Rational Selection of Factors of Safety in Reliability-Based Design of Flexible Pavements in Saudi Arabia." Transportation Research Record: Journal of the Transportation Research Board 1540, no. 1 (January 1996): 39–47. http://dx.doi.org/10.1177/0361198196154000106.

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Анотація:

Explicit applications of reliability in pavement engineering have been of interest to pavement engineers for the last 10 years. Variabilities in parameters affecting pavement design performance result in variability in pavement performance prediction and thus affect the reliability of how long the pavement will last. Rational quantification of those variabilities is essential for incorporating reliability and selecting the proper factors of safety in the pavement design performance process. The prevailing methodology in Saudi Arabia of quantifying the variability in pavement performance due to the variabilities of the parameters affecting that performance is demonstrated. Factors of safety for flexible pavement design at various reliability levels and based on those prevailing variabilities are presented. These factors of safety are recommended for flexible pavement design in Saudi Arabia.

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43

Lipiński, Mirosław J., and Małgorzata K. Wdowska. "Capability and limitations in laboratory determination of stiffness parameters of soils." Annals of Warsaw University of Life Sciences, Land Reclamation 47, no. 2 (June 1, 2015): 139–51. http://dx.doi.org/10.1515/sggw-2015-0020.

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Анотація:

Abstract The paper concerns laboratory methods for determination of soil stiffness. Major criterion for selection of analysed equipment is range of strain in which stiffness can be reliably determined. Substantially, various configurations of triaxial apparatus are referred to i.e. with standard cell and with the modified one. Additional system for internal measurement of strain is described and rational (based on test results) for use of it is presented. As to shear wave velocity measurement as a mean to obtain initial stiffness, requirements for proper measurement and interpretation was given. Finally, an approach to determine Poisson’s ratio on the basis of combined results of cyclic triaxial and resonant column tests was presented.

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44

Bao, Xian Kai, and Meng Hui Que. "A Certain Foundation Pit Support Design and Construction in Baotou." Applied Mechanics and Materials 580-583 (July 2014): 539–43. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.539.

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We adopt the supporting scheme of soil nailing wall by comparison and selection combining engineering geological conditions and surrounding buildings load situations. And introduce focally its supporting principles and major parameters and main construction points. The scheme meets the engineering requirements proved by the construction acceptance inspection with its safe and rational design and construction convenience.

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45

Grant, Elizabeth J., and James R. Jones. "A Decision-making Framework for Vegetated Roofing System Selection." Journal of Green Building 3, no. 4 (November 1, 2008): 138–53. http://dx.doi.org/10.3992/jgb.3.4.138.

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Анотація:

Design frequently involves making tradeoffs to obtain the “optimal” solution to a design problem, often using intuition or past experience as a guide. Since vegetated roofing is a relatively complex and comparatively new technology to many practitioners, a rational, explicit method to help organize and rank the tradeoffs made during the design process is needed. This research comprises the creation of a framework diagramming the decision process involved in the selection of vegetated roofing systems. Through literature review, case studies and interviews with experts, the available knowledge is captured and organized to determine the critical parameters affecting design decisions. Six important evaluative categories are identified and parameters within these categories are addressed in the context of a decision support system for green roof designers. A summation of the total importance of the advantages represented by each alternative is used to determine the most feasible green roof system for a particular project. The framework is demonstrated and compared with green roof designers' decision-making processes and conclusions are drawn regarding its effectiveness.

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46

Junius, Niels, Elham Vahdatahar, Esko Oksanen, Jean-Luc Ferrer, and Monika Budayova-Spano. "Optimization of crystallization of biological macromolecules using dialysis combined with temperature control." Journal of Applied Crystallography 53, no. 3 (May 5, 2020): 686–98. http://dx.doi.org/10.1107/s1600576720003209.

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Анотація:

A rational way to find the appropriate conditions to grow crystal samples for bio-crystallography is to determine the crystallization phase diagram, which allows precise control of the parameters affecting the crystal growth process. First, the nucleation is induced at supersaturated conditions close to the solubility boundary between the nucleation and metastable regions. Then, crystal growth is further achieved in the metastable zone – which is the optimal location for slow and ordered crystal expansion – by modulation of specific physical parameters. Recently, a prototype of an integrated apparatus for the rational optimization of crystal growth by mapping and manipulating temperature–precipitant–concentration phase diagrams has been constructed. Here, it is demonstrated that a thorough knowledge of the phase diagram is vital in any crystallization experiment. The relevance of the selection of the starting position and the kinetic pathway undertaken in controlling most of the final properties of the synthesized crystals is shown. The rational crystallization optimization strategies developed and presented here allow tailoring of crystal size and diffraction quality, significantly reducing the time, effort and amount of expensive protein material required for structure determination.

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47

Dan, Mu, and Shi Chuwei. "Research on the order parameter selection algorithm based on correlation analysis and principal component analysis——Taking the Logistics sector in Gansu Province as an example." E3S Web of Conferences 214 (2020): 02031. http://dx.doi.org/10.1051/e3sconf/202021402031.

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Анотація:

An order parameter selection algorithm based on correlation analysis and principal component analysis was designed according to the statistical analysis method, the selection principle of order parameters of social system, and the correlation test in correlation analysis and the variable contribution test in principal component analysis in this paper. The redundant variables were eliminated from the system by correlation analysis first, and then the variables with high contribution to the system were selected by principal component analysis, so the order parameters obtained accordingly not only have low information redundancy, but also reflect the actual information of the social system to the greatest extent. At the end of this paper, the logistics sector in Gansu Province was taken as an example to select the panel data from 2006 to 2015. Eight indices were extracted as the order parameters of the logistics sector in Gansu Province from the sixteen indices which are redundant selected by this algorithm. The order parameters selected by rational judgment reflect 99% of the original information. The results show that the order parameters in the social system can be correctly and reasonably selected by this order parameter selection algorithm based on correlation analysis and principal component analysis.

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48

Perelmuter, Anatolii. "ON THE CHOICE OF PRESTRESSING PARAMETERS." International Journal for Computational Civil and Structural Engineering 17, no. 3 (September 29, 2021): 114–19. http://dx.doi.org/10.22337/2587-9618-2021-17-3-114-119.

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This paper focuses on the regulation of forces in a statically indeterminate system under the action of many loads. This regulation is realized by prestressing. The paper compares two proposed methods for selecting rational values of the prestressing parameters: maximizing the minimum bearing capacity margin for the elements of the system (1) and equalizing the margins for all elements (2). An illustrative example is provided.

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49

Monarkin, Nikolay, Anton Sinitsyn, Denis Karpov, and Timur Akhmetov. "Method for designing energy-efficient ventilation systems based on regenerative heat exchangers." E3S Web of Conferences 178 (2020): 01037. http://dx.doi.org/10.1051/e3sconf/202017801037.

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The method of designing ventilation systems based on stationary switching regenerative heat exchangers is presented. Recommendations for selection of rational device parameters are given and substantiated. The diameter and thickness of a single channel wall of regenerative nozzle; the total diameter and length of nozzle; the time of heat accumulation or regeneration stages; the heat capacity and density of nozzle material; air flow rate are considered.

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50

Qiu, Jing, Rui Li Shen, Huai Guang Li, and Xun Zhang. "Analysis of Structural Parameters of Cable-Stayed Suspension Bridges." Advanced Materials Research 163-167 (December 2010): 2068–76. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.2068.

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Анотація:

The cable-stayed suspension bridge is a novel composite structure with great overall stiffness and the capacity to span a long distance, which has been proposed for the design of some extra long-span bridges. To take further research on mechanical properties and behavior of this type of structure, the proposed preliminary design of a cable-stayed suspension bridge with a main span of 1800m is analyzed. The three-dimensional nonlinear analysis method is used to investigate systematically the influence of various principal structural parameters on the static and dynamic behavior of bridges. These parameters include the rise-span ratio, the suspension-to-span ratio, the constraint condition of the stiffened girder, the number of auxiliary piers at side spans, the layout of suspension cables, and the elastic modulus of suspension cables. Meanwhile, the selection of the rational values of these parameters is discussed.

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