Journal articles: 'Working parameters'

1

Rakishev, B. R., V. S. Bobovich, and I. R. Gurevich. "Direct impact slot working parameters." Soviet Mining Science 25, no. 1 (January 1989): 40–43. http://dx.doi.org/10.1007/bf02528428.

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Obidov, Abdulhay, Karimjon Nuriev, Madrahim Allanazarov, Ermamat Kurbonov, and Rustam Khudoyberdiev. "Parameters of tillage working bodies." E3S Web of Conferences 284 (2021): 02012. http://dx.doi.org/10.1051/e3sconf/202128402012.

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This article notes that most of the soil-cutting working bodies wear out their socks a lot, as a result of which their limiting state is reached. Despite the fact that other parts of the working body are still workable and the stock of metal for wear is still sufficient, the working body is completely rejected. In this regard, it is emphasized that increasing the durability of the nose parts leads to an increase in the durability of the entire working body. To determine its parameters, the condition for leveling the resources of socks and other parts of the soil-cutting working bodies is considered. When determining the length of the nose of the bits, an analytical dependence is recommended, taking into account the geometric parameters of the bit and the plowshares welded to it. To obtain self-sharpening in the process of bit nose wear, it is recommended to use a new two-faceted profile. The rational values of the length, the angle of the wedge and the sharpening of the nose are determined, equal to 90 mm, 100 and 350-400, respectively. Based on the condition of rational combinations of strength and self-sharpening characteristics of the toes of bits, the thickness and width of the latter were determined, equal to 22.3 mm and 30 mm, respectively.

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Matsiuk, B. V., and S. V. Orischenko. "Research working process sorting of materials and dynamic parameters of vibration screen." Naukovij žurnal «Tehnìka ta energetika» 11, no. 1 (January 30, 2020): 29–39. http://dx.doi.org/10.31548/machenergy2020.01.029.

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Fríd, M., J. Šabatka, and I. Celjak. "The effect of working conditions on the selected parameters of duckfoot shares." Research in Agricultural Engineering 50, No. 2 (February 8, 2012): 66–74. http://dx.doi.org/10.17221/4929-rae.

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We measured a series of six duckfoot shares in the years 1999–2000. The purpose of the research project resulted from the Grant EP7111 and the Research project MSM J06/98:122200002/I. We described forces affecting machine implements and we consequently calculated measuring resistances during the ploughing. The deeper the subterranean the higher the linear growth of forces. If the subterranean rises from eight to ten centimetres, it will appear an increase in forces of 59.61 in the horizontal plane and of 30.84 in the vertical plane. If the driving speed increases from 5.91 km/h to 11.38 km/h, i.e. 1.64 m/s to 3.16 m/s, the forces will intensify to 53.11 in the horizontal plane and to 25.8 in the vertical plane. We deducted an outstanding influence of soil moisture on the resistance of the duckfoot shares at all three stages.

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Vadulina, N. V., L. M. Yanbukhtina, A. I. Muzafarova, E. G. Mukhametzyanova, and A. V. Fedosov. "THE DEVICE CONTROL PARAMETERS OF WORKING CONDITIONS." Oil and Gas Business, no. 3 (June 2016): 279–92. http://dx.doi.org/10.17122/ogbus-2016-3-279-292.

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Makarenko, A. "Rationale parameters of working bodies of tillers with variable angles of working surfaces." Актуальные направления научных исследований XXI века: теория и практика 2, no. 5 (December 4, 2014): 236–40. http://dx.doi.org/10.12737/6971.

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Kukharets, Savelii, Gennadii Golub, Viktor Biletskii, and Oleksandr Medvedskii. "Substantiation of the parameters of the disk-knife working body and the study of its work." Research in Agricultural Engineering 64, No. 4 (December 31, 2018): 195–201. http://dx.doi.org/10.17221/87/2017-rae.

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The work is devoted to the issue of improving the quality of cultivating of root-bearing soil layer and optimizing its agrotechnological properties. Improving the quality of cultivation is due to the application of soil cultivating tools equipped with disk-knife working bodies. They are provided theoretical and experimental study of the work of the disk-knife working body, and it is substantiated its rational parameters. The basis of the substantiation of the parameters of the cultivating tool is the original analytical model, which reflects the process of interaction of the working body with the soil. To study the performance of the process, on the basis of kinematic equations of motion of the individual points of the working bodies, it is developed the analytical model of the motion of the battery of the working bodies. On the basis of the provided analytical researches, they were determined geometrical parameters and developed experimental samples of the disk-knife working body. It was carried out a comparative test in the field of tools equipped with disk-knife working bodies and with standard spherical cut-off discs, which confirmed the effectiveness of the use of disk-knife working bodies. The use of disk-knife working bodies ensures: the burying of plant remains and fertilizers into the root-bearing soil layer, improving the quality of soil cultivation, preserving of its structure, reducing the traction resistance of the body.

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Pasare, M. M. "Influence of working parameters on the composite electrodeposition." IOP Conference Series: Materials Science and Engineering 95 (November 3, 2015): 012031. http://dx.doi.org/10.1088/1757-899x/95/1/012031.

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Nehrii, Serhii, Tetiana Nehrii, and Ihor Yefremov. "DETERMINATION OF PARAMETERS OF DETACHED ROCK PACKS WITH COMPENSATION VOIDS." JOURNAL of Donetsk mining institute, no. 2 (2020): 58–71. http://dx.doi.org/10.31474/1999-981x-2020-2-58-71.

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Purpose: To determine the parameters of detached rock packs with compensating voids. Methodology: Analysis of technologies for the protection of development workings, based on the management of the stress-strain state of rocks around the workings, physical modeling using equivalent materials, numerical modeling by the finite element method, and methods of structural mechanics. Results: In the conditions of soft soil rocks the expediency of application of protection means based on management of a stress-strain condition in a surrounding massif and redirection of extrusion forces from a working has been substantiated. On the basis of analysis of the existing protection measures of the workings behind faces the prospects of use of protection technologies by means of construction of detached rock packs with limiting surfaces between which there are compensatory voids left, have been proved. To determine the parameters of such packs and voids between them in the conditions of soft soil rocks, a set of laboratory and numerical studies has been performed. According to their results, it has been established that to ensure the redirection of extrusion forces from the working it is necessary to build rock packs with limiting surfaces in the form of rectangular parallelepipeds with orientation of their greater side perpendicular to the longitudinal axis of production and trapezoidal prisms with their narrower orientation towards the working. Recommendations on the parameters of these structures and compensatory voids between them in the conditions of soft soil rocks have been formulated. Scientific novelty: On the basis of numerical modeling the regularities of stress distribution in rocks under detached rock packs of different shapes have been investigated, which allowed substantiating the parameters of the last and compensatory voids between them to ensure the stability of workings in the soft soil rocks. Practical significance: The expediency of application of technologies of protection of preparatory workings behind faces in the conditions of soft soil rocks by means of rock packs with limiting surfaces between which there are compensatory voids has been proved, and their parameters have been defined.

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Di, Shuan Hu, and Jin Yuan Tang. "Effects of a Keyway Broaching Machine Craft Parameters and Structural Parameters on Keyway Broaching Precision." Advanced Materials Research 871 (December 2013): 358–62. http://dx.doi.org/10.4028/www.scientific.net/amr.871.358.

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The 3D geometric model was established based on working principle of a new keyway broaching machine. The horizontal deformation of drawing knife blade in working stroke is analyzed by the finite element software ABAQUS. The research which effect law of the feed, structural sizes of cutter rod and sizes of cutter guiding rod on position deformation of broaching blade in working stroke given quantitative relationship between parameters of processing craft and structure and cutting precision. The selection method and way of processing parameters and structural parameters to improve broaching precision of keyway broaching machine are obtained. The research work provides relevant technological basis for the design of high precision keyway broaching machine.

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Cheberiachko, S. I., O. V. Stolbchenko, and M. M. Naumov. "Evaluation of respiratory devices parameters influence on working capacity." Mining of Mineral Deposits 9, no. 4 (December 30, 2015): 397–402. http://dx.doi.org/10.15407/mining09.04.397.

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12

Fortyhin, A. A. "Identification of the working area of steel parameters 40." Bulletin of Prydniprovs’ka State Academy of Civil Engineering and Architecture, no. 5 (October 23, 2018): 75–82. http://dx.doi.org/10.30838/j.bpsacea.2312.271118.75.369.

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13

Kryukov, S. A., and A. S. Kryukova. "Determining the Parameters of Grinding Wheels Working Surface Profile." Procedia Engineering 206 (2017): 204–9. http://dx.doi.org/10.1016/j.proeng.2017.10.461.

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Yamada, Kazuo, Shunsuke Hanehara, and Makoto Matsuhisa. "Two Working Parameters Representing the Dispersing Mechanism of Superplasticizer." Concrete Research and Technology 10, no. 3 (1999): 61–68. http://dx.doi.org/10.3151/crt1990.10.3_61.

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15

Yu, Yang, Jinglei Xu, and Ninggang Gan. "Effects of Parameters on Continuously Working Plasma Synthetic Jet." Engineering Applications of Computational Fluid Mechanics 8, no. 1 (January 2014): 55–69. http://dx.doi.org/10.1080/19942060.2014.11015497.

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Rimár, Miroslav, Olha Kulikova, and Andrii Kulikov. "Determination of the Working Parameters of the Biomass Boiler." MATEC Web of Conferences 328 (2020): 02002. http://dx.doi.org/10.1051/matecconf/202032802002.

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The modern day trend is associated with the green energy. Thermochemical conversion is the commonly used way of extraction energy from the biomass. Nevertheless, the thermochemical processes of the combustion are not totally known. The simulation model of the woodchips boiler was made to understand the processes inside. Simulation model was made for Ansys Fluent 2019. Combustion model consist of two combustion stages: 1st – combustion of volatile compounds, 2nd – combustion of the solid parts. The simulation was validated by the series measurements at the boiler HERZ firemytic 80 BioControl.

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Liu, Jing-ping, Jian-qin Fu, Ren-hua Feng, and Guo-hui Zhu. "Effects of working parameters on gasoline engine exergy balance." Journal of Central South University 20, no. 7 (July 2013): 1938–46. http://dx.doi.org/10.1007/s11771-013-1693-6.

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Kumbhar, Anil, Nitin Gulhane, and Sachin Pandure. "Effect of Various Parameters on Working Condition of Chiller." Energy Procedia 109 (March 2017): 479–86. http://dx.doi.org/10.1016/j.egypro.2017.03.076.

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Anzhelika, Stakhova. "Monitoring System of Vibroacoustic Parameters of a Working Zone." Volume 02 Issue 02 vm02, is02 (December 24, 2021): 64–72. http://dx.doi.org/10.23890/ijast.vm02is02.0203.

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This article discusses the safety problems of the use of aviation technology associated with the influence of operational vibration of aircraft. The topical issue of timely detection and prevention of a dangerous state of critical machines and mechanisms is analyzed. Modern means of measuring vibration parameters, principles of measurement, as well as characteristics of the sensitive element of the measuring transducer, are considered. The block diagram and operation algorithm of the proposed system for monitoring vibroacoustic parameters, which is built on the basis of a piezoelectric transducer, is presented. This system can measure the parameters of noise and vibration and analyze the measured data, signal about exceeding the permissible ranges for human work, display the measured data. The advantage of the proposed system is the connection of the measuring channels with the mainboard using the Bluetooth module, which allows the sensors to measure noise and vibration to be placed in any part of the working area.

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Suljević, Damir, Muhamed Fočak, Dunja Rukavina, and Amir Zahirović. "COMPARATIVE ANALYSIS OF HEMATOLOGICAL PARAMETERS IN WORKING POLICE DOGS." Macedonian Journal of Animal Science 6, no. 1 (2016): 65–69. http://dx.doi.org/10.54865/mjas1661065s.

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21

Marchenko, L. A., and M. A. Safonov. "Determination of an Injection Sprayer's Technological Parameters." Agricultural Machinery and Technologies 12, no. 5 (November 8, 2018): 31–38. http://dx.doi.org/10.22314/2073-7599-2018-12-5-31-38.

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Agricultural boom sprayers are equipped with injection sprayers of mainly foreign origin. The main parameters of the injection sprayers shown in the catalogs display the consumption characteristics in certain ranges without taking into account the design parameters.(Research purpose)Determination of the design and technological parameters of an injection sprayer for the introduction of pesticides.(Materials and methods)The injection sprayer belongs to the class of twophase liquidgas isothermal jet devices with the formation of an airgas mixture at the outlet. It has been established that the design model of the working process of an injection sprayer is based both on the laws of the conservation of mass, energy, momentum, as well as theoretical relationships in the form of equations describing twophase jet devices, and empirical relationships characterizing flow parameters, geometric transverse and longitudinal dimensions of the spray channels.(Results and discussion)The following analytical relationships have been obtained: the relative pressure difference generated by an injection sprayer and the volume injection coefficient for different surface area ratios of the working nozzle to the flow section of the sprayer; the ratio between the crosssectional area of the mixing chamber to the area of the working nozzle outlet and the injection ratio; relative pressure difference and the injection ratio; the ratio between the crosssectional area of the mixing chamber and the working nozzle and the relative pressure difference. The authors have determined a set of dimensionless pressure characteristics of the injection sprayer for different ratios between the crosssectional areas of the working nozzle and the mixing chamber. It has been established that the ratio between the cross sections of the mixing chamber area and the working nozzle area increases as the injection ratio increases. It has been shown that for each injection coefficient, there is an achievable relative pressure difference in the injection sprayer.(Conclusions)The authors have proposed the design equations that determine the characteristics of an injection sprayer and its main design parameters – the diameters of nozzle and mixing chambers. They have calculated the main dimensions of the sprayer for aerial topdressing by introducing working solutions of pesticides.

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Alkhdour, Ahmad, Anatolii Radkevych, Oleksii Tiutkin, and Nataliia Bondarenko. "Prediction of the stress-strain state of circular workings in a layered massif by scaling." E3S Web of Conferences 168 (2020): 00020. http://dx.doi.org/10.1051/e3sconf/202016800020.

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The scientific and technical task for determining the stress-strain state of mine workings is complicated by the presence of a layered massif. This task assumes particular importance in the case of circular tunneling. During its operation, it is important to predict the change of the stressstrain state for the massif or to carry out the prompt determination in the change of stresses and displacements for the unsupported working. The solution of this geomechanical task allows performing geometrical matching of the working, ensuring its strength and stability in the layered massif. A numerical finite element method based on StructureCAD (SCAD) software package was used to solve it. Four geomechanical systems were calculated: “unsupported working – layered massif”. Owing to the obtained results, graphs of stresses and displacements were constructed, which allow to determine these parameters for workings with different geometric parameters and X-parameter characterizing the ratio of the elasticity modulus of the matrix and the layer. Obtained regularities of change of stresses and displacements for the unsupported working when zooming made it possible to introduce scaling-parameters, which are a dimensionless ratio of the radii for a real system and a system with a unit diameter.

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Merrill, Zachary, Subashan Perera, and Rakié Cham. "Torso Segment Parameter Prediction in Working Adults." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 62, no. 1 (September 2018): 1257–61. http://dx.doi.org/10.1177/1541931218621289.

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Body segment parameters (BSPs) such as segment mass, center of mass, and radius of gyration are used as inputs in static and dynamic ergonomic and biomechanical models used to predict joint and muscle forces, and related risks of musculoskeletal injury. Because these models are sensitive to BSP values, accurate and representative parameters are necessary for injury risk prediction. While previous studies have determined segment parameters in the general population, as well as the impact of age and obesity levels on these parameters, estimated errors in the prediction of BSPs can be as large as 40% (Durkin, 2003). Thus, more precise values are required for attempting to predict injury risk in individuals. This study aims to provide statistical models for predicting torso segment parameters in working adults using whole body dual energy x-ray absorptiometry (DXA) scan data along with a set of anthropometric measurements. The statistical models were developed on a training subset of the study population, and validated on a testing subset. When comparing the model predictions to the actual BSPs of the testing subset, the predictions were, on average, within 5% of the calculated parameters, while previously developed predictions (de Leva, 1996) had average errors of up to 30%, indicating that the new statistical models greatly increase the accuracy in predicting BSPs.

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Teteriatnyk, Oleksandr, and Volodymyr Rashkivskiy. "Calculations difference of hight-speed working units depending on the kinematics of their working processes." Gіrnichі, budіvelnі, dorozhnі ta melіorativnі mashini, no. 98 (December 30, 2021): 5–10. http://dx.doi.org/10.32347/gbdmm2021.98.0101.

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High-speed working units are very widely used in modern construction, in the destruction of durable materials and soils and more. When calculating the power and energy parameters of dynamic working units take into account changes in the nature of the interaction of the cutting element with the environment and the emergence and propagation of soil stresses from the action on the boundary of the array of the cutting element. This leads to the emergence of a stress-strain state in the soil mass, which has an oscillatory-wave character. The nature of the stress-strain state is influenced by the state of the working environment and the speed of cutting (destruction) of the soil mass. An unsolved problem in the dynamic destruction of soils is to take into account the kinematic features and technology of work with high-speed peripheral and front-end working units. The design parameters of these working units must take into account not only the dynamic parameters of the fracture process, but also the phenomenon of accumulation of fatigue deformations in the working environment.

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Pavlov, Stanislav A. "SOLUTION OF THE PROBLEM OF TRANSIENT AIR DISTRIBUTIONIN VENTILATION NETWORKS OF MINES, TAKING INTO ACCOUNT THERMODYNAMIC AIR FLOW PARAMETERS." Interexpo GEO-Siberia 2 (July 8, 2020): 138–47. http://dx.doi.org/10.33764/2618-981x-2020-2-138-147.

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This paper highlights the importance of calculating transient air distribution in mine ventilation networks, taking into account heat ventilation parameters of mine working atmosphere. The change in the temperature of an air flow as it moved along a working with a constant wall temperature was studied. For the network mathematical model of transient air distribution in a ventilation network of the mine, a new resolver was developed which takes into account the revealed regularities of change in air flow temperature from its velocity, temperature and cross-sectional area of mine workings, and allows calculating the change in air temperature as it moves along mine workings. The results of change in air temperature during its movement along the mine working were compared with analytical calculation method and in solving the problem by finite volume method. The obtained simulation results have good convergence. The deviation values obtained in the network model of transient air distribution from the finite volume method do not exceed 7 %.

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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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Golovnia, S. N., S. A. Gorokhov, A. P. Vorobiev, O. B. Koretskaja, L. P. Okaevich, and O. P. Tolbanov. "The thermal stability of the working parameters of GaAs detectors." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 509, no. 1-3 (August 2003): 40–46. http://dx.doi.org/10.1016/s0168-9002(03)01546-8.

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Bodio, E., M. Chorowski, and M. Wilczek. "Working parameters of domestic refrigerators filled with propane-butane mixture." International Journal of Refrigeration 16, no. 5 (January 1993): 353–56. http://dx.doi.org/10.1016/0140-7007(93)90008-v.

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Golovnia, S. N., S. A. Gorokhov, Y. P. Tsyupa, A. P. Vorobiev, O. B. Koretskaja, L. P. Okaevich, and O. P. Tolbanov. "Influence of cooling on the working parameters of GaAs detectors." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 494, no. 1-3 (November 2002): 223–28. http://dx.doi.org/10.1016/s0168-9002(02)01470-5.

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Prajwowski, K., T. Osipowicz, and Ł. Mozga. "Effect of ozone addition on working parameters of diesel engine." IOP Conference Series: Materials Science and Engineering 421 (October 11, 2018): 042066. http://dx.doi.org/10.1088/1757-899x/421/4/042066.

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Wang, Heng, Shukun Cao ※, Quancheng Dong, Yi Cui, Zijian Cao, Shuqiang Xu, Xiangwen Song, and Hao Shen. "Optimization and control of working parameters of hot blast furnace." MATEC Web of Conferences 175 (2018): 02030. http://dx.doi.org/10.1051/matecconf/201817502030.

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In order to improve the working efficiency of hot blast stoves, reduce environmental pollution, reduce labor intensity and improve combustion efficiency, this paper uses ANSYS software to simulate the temperature field and flow field of the hot blast stove, and uses the PID controller to realize the automatic control of the hot blast stove. The model and working principle of the hot blast stove are briefly introduced. The operating parameters (blowing fan air flow, coal intake) of the hot blast stove are briefly studied. The results show that the amount of air flow of the blast furnace depends on the coal intake of the hot blast stove, which is generally per kilogram of coal. 8m3-10m3- air is required. When the coal intake is 120kg/h and the air volume of the blower is 1200m3/h, the hot blast stove can work stably with high efficiency. The results obtained are input into the database for later combustion. The work provides a theoretical basis.

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Skrodzka, Ewa B., and Aleksander P. Sęk. "Comparison of modal parameters of loudspeakers in different working conditions." Applied Acoustics 60, no. 3 (July 2000): 267–77. http://dx.doi.org/10.1016/s0003-682x(99)00050-x.

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Serikov, V. V., and M. Yu Rubtsov. "Psychophysiological parameters of railway power dispatchers as working efficiency criteria." Russian Journal of Occupational Health and Industrial Ecology, no. 7 (August 2, 2020): 450–55. http://dx.doi.org/10.31089/1026-9428-2020-60-7-450-455.

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Introduction. Determining the professional performance, endurance and stress resistance of power dispatchers who manage all power supply devices on the railway is one of the essential aspects of ensuring train safety.The aim of the study is to determine the criteria for professional performance, endurance and the probability of developing professional stress by analyzing the psychophysiological parameters of railway power dispatchers.Materials and methods. Psychophysiological studies were conducted to assess stress resistance; emotional stability; attention stability; attention switching; interference stability, attention distribution, and overall functional status in 63 energy dispatchers (40 men and 23 women; average age 40.6±10.68 years, experience 13.4±1.25 years).Results. Based on the degree of intellectual, sensory, emotional and regime loads, according to the degree of labor intensity, the labor activity of energy dispatchers can be classified as class 3.2. It is shown that these psychophysiological parameters are the most significant for professional activity and allow an adequate assessment of their performance and professional fitness. In the absence of a significant dependence of the parameters of attention distribution, attention stability, reflecting the characteristics of mental fatigue and stability, on the age, length of service and gender of energy dispatchers, some gender features were identified for other indicators. Women were found to have a slightly higher noise immunity compared to men, apparently due to the predominance of excitatory processes over inhibitory ones, with greater stability and balance of excitation and inhibition in the central nervous system in men. This was accompanied by less emotional and stress resistance of female energy dispatchers, which may be a criterion for earlier development of professional stress in women. Additionally, an express test to assess the functional state also showed deeper manifestations of professional stress in female energy dispatchers,which may affect the quality of their professional activities.Conclusions. The high adequacy and resolution of the applied set of methods for assessing the performance of dispatchers and early detection of manifestations of occupational stress is shown, and gender differences in the manifestations of the latter require further development of additional measures to prevent health disorders and increase the productivity of women energy dispatchers.

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Popikov, Petr, Mihail Drapalyuk, Maksim Gnusov, and P. Goncharov. "Justification of parameters forest gruntometa with the combined working bodies." Актуальные направления научных исследований XXI века: теория и практика 2, no. 2 (March 17, 2014): 77–80. http://dx.doi.org/10.12737/3106.

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Kordubaylo, Aleksey, Boris Simonov, and Yuri Pronkin. "WORKING PARAMETERS OF LOAD-BEARING ELEMENT OF HOLE VIBRATION SOURCE." Interexpo GEO-Siberia 2, no. 4 (2019): 98–106. http://dx.doi.org/10.33764/2618-981x-2019-2-4-98-106.

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Requirement of oil and gas industry in increasing of rate of hydrocarbon extraction from deposits contributes to development of science-based methods of oil production increasing. Vibrowave impact to productive seam is related to such methods. This impact can be effectively carried out with hole seismic signal sources. In the work results of study of load-bearing element of hole electro-magnetic pulse source are represented. Objective of the work is the study of static and dynamic strains of casing pipe, determination of values of pressure pulses at modified load-bearing element during its work with electro-magnetic striking center. Values of static and dynamic strains of casing pipe under the action of thrust force are experimentally determined. The values are located in flexible zone and make 1mm at the static load and from 0.35 up to 0.6mm at the pulse load. As the results of tests of vibration source prototype, dependence of pulse pressure value at load-bearing element on voltage of striking center supply under the pressure of preliminary pumping 20MPa is obtained. Pulse amplitude raises proportionally voltage in the range from 14.2 MPa up to 19.7 MPa. Experiments with increasing of pumping pressure in the range from 20 MPa up to 27 MPa have shown that ratio of pulse value to pumping pressure linearly reduces when voltage of striking center supply is constant. Obtained results are scientific basic for designing of load-bearing elements destined for work at pulse impact transfer mode.

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Kohse, Stefanie, Niels Grabow, Klaus-Peter Schmitz, and Thomas Eickner. "Electrospinning of polyimide nanofibres – effects of working parameters on morphology." Current Directions in Biomedical Engineering 3, no. 2 (September 7, 2017): 687–90. http://dx.doi.org/10.1515/cdbme-2017-0145.

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AbstractThe use of the electrospinning technique is a promising and versatile method for producing fibrous nonwovens from various polymers. Here we present fibre formation via direct electrospinning of a soluble polyimide, a class of polymers that is typically insoluble. In this study solution parameters as the solvent and the polymer concentration are investigated. Furthermore relevant process parameters are varied for optimization of the performance. The presented data indicate polyimide as a promising material for the fabrication of nanofibrous nonwovens via direct electrospinning.

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Garov--, Viktor, Nikolay Limarenko--, Yuriy Panov--, and Boris Shapoval-. "Study on magnetic field parameters in the inductor working chamber." Вестник Донского государственного технического университета 16, no. 1 (January 22, 2016): 136–42. http://dx.doi.org/10.12737/18275.

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Dimitrov, R., K. Bogdanov, R. Wrobel, L. Serrano, and V. Mihaylov. "Adjustment parameters of an internal combustion engine working with methane." IOP Conference Series: Materials Science and Engineering 664 (October 29, 2019): 012020. http://dx.doi.org/10.1088/1757-899x/664/1/012020.

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Dekopov, A. S. "Production technology and working parameters for serial 75Se based radiators." Atomic Energy 112, no. 6 (October 2012): 423–27. http://dx.doi.org/10.1007/s10512-012-9578-6.

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Tang, Chun-Ming, Jin-Bao Jian, and Guo-Yin Li. "A working set SQCQP algorithm with simple nonmonotone penalty parameters." Journal of Computational and Applied Mathematics 236, no. 6 (October 2011): 1382–98. http://dx.doi.org/10.1016/j.cam.2011.09.002.

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Dubinin, A. M. "Optimizing the working parameters for a fluidized-bed gas generator." Glass and Ceramics 46, no. 12 (December 1989): 476–78. http://dx.doi.org/10.1007/bf00680000.

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Popikov, P., Anton Pozdnyakov, and Sergey Malyukov. "JUSTIFICATION OF PARAMETERS OF AUGER WORKING BODIES FOREST FIRE PROOFING MACHINES." Actual directions of scientific researches of the XXI century: theory and practice 8, no. 2 (December 29, 2020): 17–23. http://dx.doi.org/10.34220/2308-8877-2020-8-2-17-23.

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The paper provides an overview of the research of the working processes of the screw working bodies of technological machines. It is shown that at present such an issue in the theory of auger working bodies as the number of auger turns is necessary, what position of the auger spiral should be in relation to the center, etc. is not completely solved, the solution of these issues can provide increased productivity. In modern conditions, caused by global climatic changes in the world, the requirements for the conditions for the protection of forest zones have increased, which makes it necessary to increase funds for fighting fire in forests and increase the raw material and financial base of specialized forest protection services, which is due to the constant search for new and improvement of old methods of forest fire elimination. Special ground-throwing machines have the greatest efficiency, but they do not have working equipment for pushing combustible materials in the form of a ground cover, dead wood, and felling residues. For these purposes, in our opinion, the most suitable auger working bodies installed in front of the rotor-throwers. Modeling of the working process of screw working bodies is based on the particle dynamics method. In the process of modeling, the forest litter is made in the form of a set (about 5000) spherical elements in diameter, which interact with each other and with the working surfaces of the auger working bodies. The working surfaces of the screw drum are represented from the lateral surface of the cylinder, modeled as a separate geometric figure, and 200 triangles forming a helical surface. It was found that the optimal cutting depth is 8-10 cm, at which the auger almost completely cleans the working strip from the soil layer, but at the same time is not too deeply buried to cause large power losses. The identified main parameters of the auger working bodies will be used to create an effective forest fire ground-throwing machine.

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Batrachenko, A. V., and N. V. Filimonova. "THE INFLUENCE OF STRUCTURAL AND KINEMATIC PARAMETERS OF WORKING BODIES OF THE MEAT GRINDERS ON ITS PRODUCTIVITY." Foods and Raw materials 5, no. 1 (June 29, 2017): 118–30. http://dx.doi.org/10.21179/2308-4057-2017-1-118-130.

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Dong, Yi, Jianmin Liu, Yanbin Liu, Xinyong Qiao, Xiaoming Zhang, Ying Jin, Shaoliang Zhang, Tianqi Wang, and Qi Kang. "A RBFNN & GACMOO-Based Working State Optimization Control Study on Heavy-Duty Diesel Engine Working in Plateau Environment." Energies 13, no. 1 (January 6, 2020): 279. http://dx.doi.org/10.3390/en13010279.

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In order to solve issues concerning performance induction and in-cylinder heat accumulation of a certain heavy-duty diesel engine in a plateau environment, working state parameters and performance indexes of diesel engine are calculated and optimized using the method of artificial neural network and genetic algorithm cycle multi-objective optimization. First, with an established diesel engine simulation model and an orthogonal experimental method, the influence rule of five performance indexes affected by five working state parameters are calculated and analyzed. Results indicate the first four of five working state parameters have a more prominent influence on those five performance indexes. Subsequently, further calculation generates correspondences among four working state parameters and five performance indexes with the method of radial basis function neural network. The predicted value of the trained neural network matches well with the original one. The approach can fulfill serialization of discrete working state parameters and performance indexes to facilitate subsequent analysis and optimization. Next, we came up with a new algorithm named RBFNN & GACMOO, which can calculate the optimal working state parameters and the corresponding performance indexes of the diesel engine working at 3700 m altitude. At last, the bench test of the diesel engine in a plateau environment is employed to verify accuracy of the optimized results and the effectiveness of the algorithm. The research first combined the method of artificial neural network and genetic algorithm to specify the optimal working state parameters of the diesel engine at high altitudes by focusing on engine power, torque and heat dissipation, which is of great significance for improving both performance and working reliability of heavy-duty diesel engine working in plateau environment.

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Krukovskyi, Oleksandr, Yurii Bulich, Serhii Kurnosov, Oleksii Yanzhula, and Vladimir Demin. "Substantiating the parameters for selecting a pillar width to protect permanent mine workings at great depths." IOP Conference Series: Earth and Environmental Science 970, no. 1 (January 1, 2022): 012049. http://dx.doi.org/10.1088/1755-1315/970/1/012049.

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Abstract Application of a method to protect permanent mine workings by large pillars requires thorough analysis of geomechanical processes aimed at providing stability for a mine working during its long-term operation. The purpose of the paper is to study the processes of coal rock mass deformation to substantiate the selection of the protective pillar width. The examples to be considered are represented by mining-geological conditions of a central panel of PJSC Colliery Group “Pokrovske” where four permanent mine workings are planned to be driven. To substantiate the width of protective pillars, geomechanical stability of mine workings have been assessed in terms of the effect of stoping operations of the adjacent longwalls of the block and beyond their effect. It has been shown that insufficient dimensions of a support pillar result in considerable influence of stoping operations on the stability of permanent mine workings. Along with the increasing dimensions of a support pillar, the pressure in the rocks around the permanent inclined mine workings decreases, and the support load decreases as well. In terms of the appropriate dimension of the support pillar, the boundaries of the effect become smaller; the bolting and frame support provides completely the required mine working stability.

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Souza, Pamela E., and Lynn Sirow. "Relating Working Memory to Compression Parameters in Clinically Fit Hearing Aids." American Journal of Audiology 23, no. 4 (December 2014): 394–401. http://dx.doi.org/10.1044/2014_aja-14-0006.

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Purpose Several laboratory studies have demonstrated that working memory may influence response to compression speed in controlled (i.e., laboratory) comparisons of compression. In this study, the authors explored whether the same relationship would occur under less controlled conditions, as might occur in a typical audiology clinic. Method Participants included 27 older adults who sought hearing care in a private practice audiology clinic. Working memory was measured for each participant using a reading span test. The authors examined the relationship between working memory and aided speech recognition in noise, using clinically fit hearing aids with a range of compression speeds. Results Working memory, amount of hearing loss, and age each contributed to speech recognition, but the contribution depended on the speed of the compression processor. For fast-acting compression, the best performance was obtained by patients with high working memory. For slow-acting compression, speech recognition was affected by age and amount of hearing loss but was not affected by working memory. Conclusions Despite the expectation of greater variability from differences in compression implementation, number of compression channels, or attendant signal processing, the relationship between working memory and compression speed showed a similar pattern as results from more controlled, laboratory-based studies.

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Liu, He Ping. "Study on TBM Cutterhead Working Principle." Applied Mechanics and Materials 152-154 (January 2012): 1612–18. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.1612.

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This paper studies the working principle of TBM cutterhead and analyzes the models of cutterhead breaking rocks. A revised model is presented to think about some rock factors based on the CSM model, in which the attribute of wall rock such as foliation, joint spacing, the angle between boring axis and the surface of foliation and abrasiveness had be taken into account. This probably describes more exactly the real conditions of TBM to break wall rock. To raise the level of design and manufacturing of TBM cutterhead, some advices are provided to design main parameters of TBM and excavating parameters.

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Xu, Qin, Yuan Yue Huang, and Yue Zhang. "Analysis of Conditional Parameters in the Hydraulic Impactor." Advanced Materials Research 347-353 (October 2011): 128–31. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.128.

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The hydraulic impactor is the key component that affects the hydraulic impact mechanical properties. Impact energy or impact power parameter is the important indication of impact system performance. The conditional parameters affecting the basic function were analyzed in this paper. The pressure change and flow of different working cavity in the working process were experimental studied on the experimental device. The relationships between the rate of flow and pressure in the impactor were also discussed.

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Lin, Gui Yu, Yan Feng Luo, Ting Na Sun, and Kui Xian Li. "The Design Method of Major Parameters for Built-Up Columns." Advanced Materials Research 915-916 (April 2014): 264–72. http://dx.doi.org/10.4028/www.scientific.net/amr.915-916.264.

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Built-up columns are widely used in engineering structure, but it is confusing for designers how to determine the parameters of built-up columns. The paper based on the user's basic needs which are the minimum working radius and working load, would simplify working load, support force and hoisting force to the vertex of built-up columns. From the origin of design, and to analyze mechanic behavior of built-up columns, and have found the relationship between internal forces, that is, the axial force, the swing force, the support force, and the working load. In accordance with design experience, the relationship between axial internal stress and its total working stress, critical stress and limit of yielding, had been respectively determined. According to this knowledge to determine the mass and the geometrical parameters of major cross-sections and roots of built-up columns, and a comparison between the results and ones of examples calculations were made, and it was found that the results are reasonable. This will offer a design method of determining the major parameters of built-up columns at the phase of the preliminary design, and improve the independent design capability.

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Parkhomenko, Galina, Sergey Kambulov, Victor Pakhomov, Vladimir Kolodkin, Viacheslav Lebedenko, Artem Doroshenko, Alexander Koltsov, and Denis Muratov. "Substantiation of the parameters of an innovative working body for shallow tillage." E3S Web of Conferences 210 (2020): 08007. http://dx.doi.org/10.1051/e3sconf/202021008007.

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The purpose of study: determine the rational parameters of an innovative working body that carries out a high-quality technological process of shallow soil cultivation. An innovative working body for shallow soil cultivation was developed on the basis of nature-like technologies that are currently relevant in scientific research. The ratio when using the golden ratio arises when comparing curvilinear and rectilinear, i.e. natural and artificial forms. The development of a new working body design is based on the physics of the interaction process with the processed environment, using analogies of shape and optimal proportions existing in nature. The working body design for shallow tillage with curved surfaces of increased streamlining using the configuration of natural sliding lines of the treated medium layer during cultivation has been developed. Depending on the required processing depth (6-16 cm), the innovative working body efficiently performs the cutting process with sliding, and also performs flat-cut loosening. Rational parameters and functioning modes of an innovative working body for shallow tillage have been obtained: length – 305 mm; working width – 450 mm; angle of crumbling, sharpening, posterior occipital cutting, mortar, rise – 15, 12, 10, 75-110, 10 degrees respectively; speed – 9-12 km/h.

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Journal articles on the topic 'Working parameters'

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