Статті в журналах: "Funte element method Data processing"

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Shulgina, Yuliya, Maria A. Kostina, Evgeniy Shulgin, and Alexey Soldatov. "Method of Processing Data of Acoustic Array." Materials Science Forum 970 (September 2019): 242–49. http://dx.doi.org/10.4028/www.scientific.net/msf.970.242.

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Within this article, a method has been developed to reduce the amount of transmitted data from the receiving and preprocessing unit to a personal computer. On logical grounds, there is compelling reason to use as a basic property of an ellipse as a ground of the method. The developed data processing algorithm for the multi-element array system was tested in the MatLab software package. Also, a block diagram and data processing algorithm were developed for the practical implementation on a field programmable gate array.

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Soloviev, A. N., M. A. Tamarkin, and Nguyen Van Tho. "Finite element modeling method of centrifugal rotary processing." Vestnik of Don State Technical University 19, no. 3 (October 4, 2019): 214–20. http://dx.doi.org/10.23947/1992-5980-2019-19-2-214-220.

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Introduction. In modern production, when performing finishing operations, centrifugal rotary processing in the medium of abrasive plays an important role. High productivity, low costs and extensive technological capabilities are the main advantages of these cleaning and finishing operations. This paper considers the process of abrasive particle – workpiece surface interaction within the framework of the static contact problem of the elasticity theory. Thus, plastic deformation in the contact area comes into account.Materials and Methods. The abrasive particle (corundum) is simulated with a linearly elastic body, whose Young's modulus is significantly larger than that of the work material. The process material (steel) is simulated with an elastoplastic bilinear body using the von Mises yield criterion.Research Results. Finite element modeling of the structures under consideration was performed in the ANSYS CAE package. The process of abrasive particle – workpiece surface interaction was simulated; its stress-strain state was analyzed. The results of numerical experiments are presented. They have determined how equivalent plastic strains are distributed at depths of the cone penetration of 0.01 mm and 0.05 mm. The data obtained, as well as the areas of plastic strain values of more than 1%, are visualized in the ANSYS CAE package.Discussion and Conclusions. It is established that the equivalent plastic deformation is proportional to the depth of penetration (DP). It reaches a minimum value of 0.158 at DP = 0.01 mm, and a maximum of 0.825 at DP = 0.05 mm. The dependences of the plastic region sizes on DP are determined for cases when the plastic deformation exceeds 1%. At the maximum penetration (0.05 mm), the deformation radius is 1 mm, and the depth is 0.8 mm. On the basis of the data obtained as a result of the conducted research, the parameters of the technological process (rotational speed, size of the abrasive surface, mass of abrasive particles) that affect the workpiece – abrasive particle interaction can be selected. A judicious choice of these parameters will increase the processing efficiency

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Di Rienzo, Luca, Alberto Cosmai, and Stephan Russenschuck. "Post-Processing Magnetic Measurement Data of Accelerator Magnets by the Boundary Element Method." IEEE Transactions on Magnetics 53, no. 6 (June 2017): 1–4. http://dx.doi.org/10.1109/tmag.2017.2652119.

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Li, Weihan, Yang Li, Ling Yu, Jian Ma, Lei Zhu, Lingfeng Li, Huayue Chen, and Wu Deng. "A Novel Fault Feature Extraction Method for Bearing Rolling Elements Using Optimized Signal Processing Method." Applied Sciences 11, no. 19 (September 29, 2021): 9095. http://dx.doi.org/10.3390/app11199095.

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A rolling element signal has a long transmission path in the acquisition process. The fault feature of the rolling element signal is more difficult to be extracted. Therefore, a novel weak fault feature extraction method using optimized variational mode decomposition with kurtosis mean (KMVMD) and maximum correlated kurtosis deconvolution based on power spectrum entropy and grid search (PGMCKD), namely KMVMD-PGMCKD, is proposed. In the proposed KMVMD-PGMCKD method, a VMD with kurtosis mean (KMVMD) is proposed. Then an adaptive parameter selection method based on power spectrum entropy and grid search for MCKD, namely PGMCKD, is proposed to determine the deconvolution period T and filter order L. The complementary advantages of the KMVMD and PGMCKD are integrated to construct a novel weak fault feature extraction model (KMVMD-PGMCKD). Finally, the power spectrum is employed to deal with the obtained signal by KMVMD-PGMCKD to effectively implement feature extraction. Bearing rolling element signals of Case Western Reserve University and actual rolling element data are selected to prove the validity of the KMVMD-PGMCKD. The experiment results show that the KMVMD-PGMCKD can effectively extract the fault features of bearing rolling elements and accurately diagnose weak faults under variable working conditions.

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Yuan, Su Ling. "The Element-Free Method for Steam Turbine Rotor." Applied Mechanics and Materials 281 (January 2013): 343–46. http://dx.doi.org/10.4028/www.scientific.net/amm.281.343.

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The element-free method is a new numerical method, which requires only nodal data and whose shape functions are continual and differentiable. The element-free method employs moving least-square approximants to approximate original functions. In this paper, discrete equations of axial symmetry problem are obtained by variational principle and Gaussian quadrature. Several numerical examples indicate that the element-free method can obtain more accurate results about these problems, moreover, results and their gradients are continuous in the entire domain and post-processing to obtain a smooth gradient field is total unnecessary. Finaly, the element-free method is applied to heat conduction problems for steam turbine rotor.

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Liang, Baohua, Haiqi Zhang, Zhengyu Lu, and Zhengjin Zhang. "Indistinguishable Element-Pair Attribute Reduction and Its Incremental Approach." Mathematical Problems in Engineering 2022 (September 29, 2022): 1–16. http://dx.doi.org/10.1155/2022/6876144.

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Attribute reduction is a popular approach of preprocessing data. Discernibility matrix is a typical method that focuses on attribute reduction. Faced with the processing of modern information systems with large amounts of data and rapid changes, the traditional static discernibility matrix reduction model is powerless. To overcome this shortcoming, this paper first proposes an indistinguishable element pair method that does not need to store discernibility information, which retains the advantages of institution and easy-to-understand, and at the same time effectively solves the problem of space consumption. In order to make the model adapt to the processing of dynamic data sets, we further study the incremental mechanism and design a set of dynamic reduction models, which can adjust the reduction set in time according to the changes of objects. Theoretical analysis and experimental results indicate that the proposed algorithm is obviously superior to the discernibility matrix model, and can effectively deal with the reduction of dynamic data sets.

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Lu, Lu, and Zhao Xu Wang. "Equivalent Stress Analysis of Piercing Process in Diescher’s Mill Using Finite Element Method." Advanced Materials Research 648 (January 2013): 170–73. http://dx.doi.org/10.4028/www.scientific.net/amr.648.170.

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In this paper, the simulation of the piercing process is performed by the three dimensional finite element method in Diescher’s mill. After a short description of the problem the numerical model of the process is described. The simulated results visualize dynamic evolution of equivalent stress, especially inside the work-piece. The non-uniform distribution of stress on the internal and external surface of the work-piece is a distinct characteristic of processing tube piercing. And it is the basic data for improving tool and design, predicting, damage and controlling the micro-structural evolution of processing tube piercing.

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Lamichhane, Bishnu P., and Lutz Gross. "Inversion of geophysical potential field data using the finite element method." Inverse Problems 33, no. 12 (November 17, 2017): 125009. http://dx.doi.org/10.1088/1361-6420/aa8cb0.

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Owerko, Tomasz, and Przemysław Kuras. "Effective Processing of Radar Data for Bridge Damage Detection." Shock and Vibration 2019 (April 17, 2019): 1–13. http://dx.doi.org/10.1155/2019/2621092.

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This paper presents the practical results of the evaluation of the data obtained by using ground-based radar interferometer during measurements carried out on bridge structures. Due to the nature of the objects studied, the authors proposed a comprehensive method of data analysis, which identifies whether the passage of the vehicle did not damage the bridge. The effective use of vehicles as a source of bridge excitation allowed us to first develop a method for determining the damping parameters resistant to potentially occurring beating frequencies. As a result, it is possible to determine these subsets of data registered with radar, for which it is possible to assume compliance with linear systems. This type of data, often omitted in other works, forms the basis for the second important element of the research—an algorithm based on the ARMA model supporting defect detection. The optimization of the performed calculations, in particular the proposed optimal ARMA model order, the method of fault identification based on the DSF parameter, or fault identification based on a nonmetrical Cook’s distance leads to a robust and scalable method. The method’s low computational complexity allows for implementation in real-time solutions. In addition, the distribution of errors and the sensitivity of classifiers based on the DSF parameter and Cook’s distances leaving them will enable the automation of the classification process using machine learning. The proposed method is universal; in particular, it can be used for radar interferometry methods because it is resistant to potentially variable environmental conditions.

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10

Mori, Kenichiro, and Y. Kanno. "Development of PC Cluster Parallel Processing Scheme of 3-D Rigid-Plastic Finite Element Method Using Diagonal Matrix." Key Engineering Materials 340-341 (June 2007): 371–76. http://dx.doi.org/10.4028/www.scientific.net/kem.340-341.371.

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The 3-D rigid-plastic finite element method using a diagonal matrix was applied to parallel processing using a distributed memory type PC cluster. The cluster composed of cheap PCs becomes common as a low-cost system in the parallel processing. Since the computers in the distributed memory type PC cluster have individual memory units, the transfer of date among computers during the computation is required, and thus the time for the data transfer is taken into consideration. The renewal of data in each computation is limited because of the time of data transfer unlike the shared memory type workstation. This brings about the delay of data renewal. A data transfer scheme was investigated to optimize the total computational time in the parallel processing. The effect of the delay of date renewal on the convergence of the solution was examined in the simulation of upsetting of rectangular block with an inclined tool by means of a cluster composed of 4 PCs and 100MBit/s Ethernet.

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Zu, Hai Ying, Mi Tian, and Jia Xuan Han. "Reverse Modeling Analysis and Design on Rubber Sealing Element in Spherical BOP." Advanced Materials Research 655-657 (January 2013): 300–304. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.300.

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Spherical BOP is one of crucial equipments in snubbing operation well in petroleum industries, with its core element of rubber sealing element, the connection between the spherical surface of metal skeleton and the rubber is irregular surface, it is difficult to determine the model by manual surveying and mapping. The paper put forward a design method on spherical bop rubber sealing element with the reverse engineering technology. Through the analysis of the reverse surveying and mapping basic requirements on spherical bop rubber sealing element, determined its data acquisition path and process spherical, and puts forward some solutions to the data merger, data transfer and the method of pixels processing.

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12

Orysenko, O. V., A. I. Kryvorot, V. V. Ilchenko, and H. А. Filipova. "THE AUTOMOBILE TIRES VULCANIZATION METHOD REPAIR PROCESS EXPERIMENTAL INVESTIGATION." ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 1, no. 50 (April 11, 2018): 56–61. http://dx.doi.org/10.26906/znp.2018.50.1059.

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In the article local repair automobile tires expediency by vulcanization means in mechanical damage carcass case is shown. It has been established that analytical and experimental data on determining the required temperature of the heating element have a significant discrepancy. It was found that on the vulcanization degree among all factors temperature and pressure on the welding surfaces are the most influential. After processing the experimental data and using the static methods, mathematical dependence of the temperature on the welding surface from the heating element temperature and on the welding surfaces as a second-degree polynomial is obtained. In order to verify the research results reliability, the control welding of the automobile tires with cord lateral rupture was conducted, which gave positive results.

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13

Sadek, Mohammad, and Ying Chen. "Discrete element modelling (DEM) of hemp processing using a hammermill." Canadian Biosystems Engineering 63, no. 1 (February 7, 2022): 2.01–2.11. http://dx.doi.org/10.7451/cbe.2021.63.2.1.

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The discrete element method (DEM) was used to develop a model to simulate hemp processing using a hammer mill. The model was computed using a commercial software package - Particle Flow Code in Three Dimensions (PFC3D). In the model, a simulated hemp stem was defined using spherical particles connected with parallel bonds implemented in the PFC3D. The breakage of the bonds mimics the hemp breaking phenomenon within the hammermill. A micro property, bond strength of the hemp stems, was calibrated using the literature data from compression tests of hemp stems. The calibrated bond strength was 2.2 x106 Pa. With the calibrated bond strength, the model was used to simulate the power and energy distributions within the hammermill. The simulations were performed for different hammer rotational speeds and feeding masses. The results showed that both the specific kinetic and strain energies increased with the increase of the feeding mass; however, the effects of the hammer rotational speed did not follow any particular trends.

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Yang, Zhong, Xiao Xian Yao, and Dong Xu Zhang. "Research on a Test Method of Dynamic Force of Jet Elements." Applied Mechanics and Materials 574 (July 2014): 154–59. http://dx.doi.org/10.4028/www.scientific.net/amm.574.154.

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According to the characteristics of the dynamic force of jet elements, a kind of simple pendulum test system was presented. The dynamic jet force value was obtained indirectly by the acceleration value of the jet element under its force. The mathematic model of the test system was established and the test errors of the amplitude and delay time were analyzed. A processing method of dynamic force test data was presented based on the test curve and the parameters of amplitude and delay time were obtained. The result indicates that the test method can satisfy the testing requirements of dynamic force and it has advantages of simple structure, low demands of testing condition and simple method of data processing.

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Golosov, Andrei, Olga Lubimova, Mikhail Zhevora, Vladislava Markevich, and Vladimir Siskov. "Data processing method for experimental studies of deformation in a rock sample under uniaxial compression." E3S Web of Conferences 129 (2019): 01018. http://dx.doi.org/10.1051/e3sconf/201912901018.

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As a result of experimental and theoretical studies, the patterns of behavior of rocks in a condition close to destructive are the focal nature of the preparation of macrocracking, which allowed us to include the mesocrack structure of the material, which is the main element in the preparation of macrocracking. Differences in this new approach to mathematical modeling will let adequately describe dissipative mesocrack structures of various hierarchical levels of geodesy, predict dynamic changes, structures and mechanical properties of both rock samples and massif, which also lead to resource-intensive experimental studies. In this paper, with usage of the methods of cluster, factor, and statistical analysis, we set the task of processing the data of experimental studies of the laws of deformation and preparing macro-fracture of rock samples by various methods, including acoustic and deformation observations.

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Sazonova, S. A., V. F. Asminin, A. V. Zvyagintseva, T. V. Kurchenkova, and S. S. Rylev. "Numerical calculation of a statically indeterminate frame by the finite element method." Journal of Physics: Conference Series 2094, no. 3 (November 1, 2021): 032030. http://dx.doi.org/10.1088/1742-6596/2094/3/032030.

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Abstract A numerical calculation of a statically indeterminate frame with high rigidity elements with the computer program STAB12. EXE using the finite element method is performed. An example of generating the source data for the program STAB12. EXE with subsequent processing of the results of the calculations is given. The features of checking the balance of nodes, rods and the frame as a whole based on the use of values taking into account the signs on the diagrams of torques, longitudinal and transverse forces are described. According to the results of calculations, the computer shows the frame in a deformed state.

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17

Lu, Songyan. "Optimization of Object-oriented 3D CAD Pre-processing System for Steel Structure of High-rise Buildings." Computer-Aided Design and Applications 18, S3 (October 20, 2020): 106–17. http://dx.doi.org/10.14733/cadaps.2021.s3.106-117.

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In this paper, the object-oriented method is used to study the pre-processing system of 3D high-rise building steel structure CAD. For the high-rise building steel structure design optimization system, users mainly contact with the functions of modeling, analysis, design checking and drawing. In fact, all these functions are carried out around the data stored behind. Three-dimensional high-rise building steel structure CAD pre-processing subsystem mainly integrates three-dimensional entity construction module, node design and editing module, construction drawing, processing drawing and CNC data output module. In this paper, the wall element is used to simulate the shear wall element, and the wall element can be automatically refined into a shell element composed of quadrilateral membrane element with rotational degree of freedom and generalized conforming bending plate element for thick and thin plate, which improves the speed and accuracy of analysis and calculation of shear wall. Various loads of high-rise building are calculated, especially the wind load of space action. It provides a new idea for wind load calculation of high-rise buildings. It is better to put forward a practical system optimization model, which can deal with the objective function, variables and constraints in a large number of engineering processing, and consider the actual constraints as fully as possible, which has strong practicability.

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Palguyev, D. A., and A. N. Shentyabin. "Matrix application for multi-radar processing of radar data arrays." Radio industry (Russia) 30, no. 3 (September 8, 2020): 99–111. http://dx.doi.org/10.21778/2413-9599-2020-30-3-99-111.

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In the processing of dynamically changing data, for example, radar data (RD), a crucial part is made by the representation of various data sets containing information about routes and signs of air objects. In the practical implementation of the computational process, it previously seemed natural that RD processing in data arrays was carried out by the elementwise search method. However, the representation of data arrays in the form of matrices and the use of matrix math allow optimal calculations to be formed during tertiary processing. Forming matrices and working with them requires a significant computational resource, so the authors can assume that a certain gain in calculation time may be achieved if there is a large amount of data in the arrays, at least several thousand messages. The article shows the sequences of the most frequently repeated operations of tertiary network processing, such as searching for and replacing an array element. The simulation results show that the processing efficiency (relative reduction of processing time and saving of computing resources) with the use of matrices, in comparison with elementwise search and replacement, increases in proportion to the number of messages received by the information processing device. The most significant gain is observed when processing several thousand messages (array elements). Thus, the use of matrices and the mathematical apparatus of matrix math for processing arrays of dynamically changing data can reduce processing time and save computational resources. The proposed matrix method of organizing calculations can also find its place in the modeling of complex information systems.

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Kanatnikov, N., P. Kanatnikova, and D. Pickalov. "Thermal Processes Simulation during Processing Bevel Gears." Solid State Phenomena 284 (October 2018): 495–500. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.495.

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In the article the model for forecasting of thermal processes arising during processing of bevel gears is presented. The kinematics of cutting is modeled due to the analytical model. Chipping is modeled using the finite element method. The experiment is based on the method of infrared photography of the cutting process. In the process of carrying out a numerical experiment, the graphs of the heat fields for the tool, the workpiece gear and chips were obtained, and an array of data on their change during the cutting process was achieved. The simulation results showed that the maximum temperatures and heat flows in the tool depend significantly on the choice of the rake and clearance angels of the cutting.

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Uysal, T. "Economic analysis of rare earth element processing methods for Mountain Pass ore." Journal of the Southern African Institute of Mining and Metallurgy 122, no. 7 (August 22, 2022): 1–6. http://dx.doi.org/10.17159/2411-9717/1989/2022.

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The increasing demand for rare earth elements (REE) in highly strategic sectors such as hybrid electric vehicles, renewable energy, communication technologies, and the defense industry has made REE production methods important. In recent years, studies on REE have increased rapidly; however there are many studies on REE, there are not enough studies in the literature on the economics of the beneficiation process. RE ores are generally leached after beneficiation by gravity, magnetic and flotation methods. In this study, direct leaching, attrition scrubbing and leaching, and flotation and leaching methods are evaluated economically based on the data for the Mountain Pass (MP) facility. According to the sensitivity analysis performed as a function of capital cost (CAPEX), operating cost (OPEX), and rare earths oxides (REO) recovery, REO recovery has the biggest effect on the process economies. Although the flotation method entails additional investment and operating costs, transportation and operating costs are significantly reduced result of the higher grade and recovery. The flotation method is more profitable, with larger NPV and IRR values and a shorter payback period.

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Ulfa, Henny Maria. "Analisis Unsur Manajemen dalam Pengolahan Rekam Medis di Rumah Sakit TNI AU Lanud Roesmin Nurjadin." KESMARS: Jurnal Kesehatan Masyarakat, Manajemen dan Administrasi Rumah Sakit 1, no. 1 (March 22, 2018): 20–25. http://dx.doi.org/10.31539/kesmars.v1i1.146.

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Hospitals must conduct a medical record activities according to Permenkes NO.269 / MENKES / PER / III / 2008 about Medical Record, to achieve the purpose of medical record processing required 5 management elements are: man, money, material, machine, and method. The medical record processing that has been implemented at the Hospital TNI AU LANUD Roesmin Nurjadin that is coding, coding only done for BPJS patients whose conducted by the officer with education background of D3 nursing, it be impacted to the storage part is wrong save and cannot found patient medical record file because are not returned. The purpose of this research is to know the element of management in the processing of medical records at the Hospital TNI AU LANUD Roesmin Nurjadin. This research is done by Qualitative descriptive method, Qualitative approach, instrument of data collection of interview guidance, observation guidance, check list register, and stationery, number of informant 6 people with inductive way data analysis. The result of this research found that Mans elements only amounts to 2 people so that officers work concurrently and have never attended training, material element and machines elements of medical record processing not yet use SIMRS and tracer, while processing method elements follow existing habits and follow the policy of hospital that is POP organization. Keywords: Management elements, medical record processing

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Ha, Jeong Min, Jong Myeong Lee, Jeong Hoon Lee, Dong Sik Gu, and Byeong Keun Choi. "Signal Processing Method (HT and HHT) of AE for Complex Fault Detection." Materials Science Forum 762 (July 2013): 656–61. http://dx.doi.org/10.4028/www.scientific.net/msf.762.656.

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In the signal processing method, envelope analysis is a useful method to evaluate the rolling element bearing problems and Wavelet transform is a powerful method to detect faults occurred on gearboxes. However, exact method for AE signal is not developed yet. Therefore, in this paper, two methods, which are Hilbert Transform (HT) and Hilbert-Huang transforms (HHT), will be compared for development a signal processing method for early fault detection system by using AE. HHT has better advantages than HT because HHT can show the time-frequency domain result. But, HHT needs long time to process a signal, which has a lot of data, and has a disadvantage in de-noising filter.

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Dong, Hai, Qing Quan Tong, and Yi Kai Wang. "Study on Quality Control Method in Multi-Specification and Small-Batch Production." Advanced Materials Research 1006-1007 (August 2014): 363–66. http://dx.doi.org/10.4028/www.scientific.net/amr.1006-1007.363.

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Aiming at the problem of less quality characteristics data in multi-specification and small-batch production, matter-element theory was applied to adjust similarity of factors affecting the quality during the processing, thus similar processes was divided and data shortage problem was resolved. In addition, the relative range method was applied to translate characteristics data, thus drawing the control chart to judge process control state.Through the analysis of a case,the validity of quality control method was verified in the multi-specification and small-batch production.

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Gong, Hai Jun, Xin Zhong Li, Xue Yi Fan, Da Ming Xu, and Jing Jie Guo. "Data-Conversion and Displaying for Numerical Simulation of EMCC with FEM-FVM-Joint Method." Advanced Materials Research 418-420 (December 2011): 563–66. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.563.

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Abstract. For efficiently performing the numerical simulation of electromagnetic continues casting (EMCC) with finite element method (FEM) and finite volume method (FVM) combined scheme, a program integrates with data-format conversion and post-processing was proposed. The conversion of data format realized by linear interpolating, and the post processor developed on a Visual Fortran 6.6A platform using Fortran-95 language and the QuickWin module. Both 2-D and 3-D EM-FEM data calculated by a general-purpose FEM software, ANSYS, could be converted into FVM-data format using this program, and all FVM-data whether scalar quantities or vector ones could be displayed in the manners of cabinet drawing and normal axonometric drawing, which promises the correctness for data format conversion process of FEM/FVM-joint and the convenient analysis of transport phenomena during EMCC numerical simulation. The results of transport simulations and data format conversions indicate that the format-conversion method as well as the post processing is effective and convenient in numerical simulation with FEM/FVM-joint under various EM fields.

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Tayyab, Syed Muhammad, Steven Chatterton, and Paolo Pennacchi. "Image-Processing-Based Intelligent Defect Diagnosis of Rolling Element Bearings Using Spectrogram Images." Machines 10, no. 10 (October 8, 2022): 908. http://dx.doi.org/10.3390/machines10100908.

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Due to the excellent image recognition characteristics of convolutional neural networks (CNN), they have gained significant attention among researchers for image-processing-based defect diagnosis tasks. The use of deep CNN models for rolling element bearings’ (REBs’) defect diagnosis may be computationally expensive, and therefore may not be suitable for some applications where hardware and resources limitations exist. However, instead of using CNN models as end-to-end image classifiers, they can also be used to extract the deep features from images and those features can further be used as input to machine learning (ML) models for defect diagnosis tasks. In addition to extracting deep features using CNN models, there are also other methods for feature extraction from vibration characteristic images, such as the extraction of handcrafted features using the histogram of oriented gradients (HOG) and local binary pattern (LBP) descriptors. These features can also be used as input to classical ML models for image classification tasks. In this study, a performance comparison between all these image-processing-based defect diagnosis techniques was carried out in terms of fault detection accuracy and computational expense. Moreover, based upon the detailed comparison, a hybrid-ensemble method involving decision-level fusion is proposed, which is far less computationally expensive compared to CNN models while using them as end-to-end classifiers. The performance of all these models is also compared in the case of minimal training data availability and for diagnosis under slightly different operating conditions to ascertain their generalizability and ability to correctly diagnose despite the minimal availability of training data. The performance of the proposed hybrid-ensemble method remained outstanding for the REBs’ defect diagnosis despite the minimal of availability training data as well as the slight variation under operating conditions.

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Pan, Chong, Xinran Ba, Yuanhua Tang, Fengchun Zhang, Yusheng Zhang, Zhengpeng Wang, and Wei Fan. "Phased Array Antenna Calibration Method Experimental Validation and Comparison." Electronics 12, no. 3 (January 17, 2023): 489. http://dx.doi.org/10.3390/electronics12030489.

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This paper investigates the calibration methods appropriate to the phased array calibration in practical measurement setups. The rotating element electric field vector (REV) method, fast amplitude-only calibration method, and complex amplitude calibration method are compared and analyzed in the same measurement setup. The objective is to investigate the robustness of the discussed algorithms with different measurement ranges, with or without the support of array element on/off operation. A 4×8 uniform rectangular array (URA) is used to validate the three different calibration methods. The measurement results indicate that array element on/off measurement in the far field is suitable to be a reference calibration method in practical setup. The REV and complex amplitude calibration methods present comparable accuracy while fast amplitude-only calibration method provides less accurate calibration results in this measurement. Further, it was demonstrated that with element on/off data available, same calibration accuracy can be achieved either in small or large measurement ranges for the three different calibration methods. However, when the element on/off data is not available, the array calibration accuracy deteriorates with small measurement range. This paper presents the method to calibrate the phased array antenna in near-field by using the element on/off data. This is a very useful method in massive production line calibration. The calibration errors of different calibration methods are analyzed. Furthermore, this paper also analyzes the uncertainty of each method.

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Xu, Daping, Yingxin Yang, and Kaisong Wu. "Data processing method for constitutive relation of the rubber core material in spherical blowout preventer." Advances in Mechanical Engineering 10, no. 7 (July 2018): 168781401878952. http://dx.doi.org/10.1177/1687814018789523.

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A data processing method for constitutive relation of large deformation rubber core in spherical blowout preventer is put forward in this article. Based on the Yeoh constitutive model and the large-deformation theory of rubber material, this article studied the constitutive relation of core material in blowout preventer. The constitutive relation experiments, the uniaxial tensile experiment, the uniaxial compression experiment, the plane tensile experiments, and the volume compression experiment were conducted and the corresponding experiment data were fitted, respectively, on basis of which the uniaxial compression data were selected for further study. For comparison, the data were, respectively, processed with a novel method and the method in GB/7757, and accordingly, two different constitutive relations were obtained and introduced into ABAQUS to simulate the experiment process. Research results show that the relative error of maximum axial deformation between the simulation using GB/7757 and the actual experiment is 34.7%, while that between the novel method and the actual experiment is 20.4%, having improved the accuracy by 14.3%, proving that the data processing method in this article can effectively improve the accuracy of finite element simulation for the core material and will contribute to the research on the performance of spherical blowout preventer.

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28

Kodzhaspirov, G. E., and A. I. Rudskoy. "Simulation of Thermomechanical Control Processing of Steels through the Use of Experimental Planning and FEM." Materials Science Forum 762 (July 2013): 289–94. http://dx.doi.org/10.4028/www.scientific.net/msf.762.289.

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The experimental planning method has been used for the examination of the combined effect of the temperature, strain, strain rate and time elapsed from the end of deformation to the start of quenching parameters of the Thermomechanical Control Processing on the structure and mechanical properties. Simulation of Thermomechanical Control Processing for the definite cross-section of profile by Finite Element Method on the base of the data obtained by the experimental planning method allowed to predict structure and mechanical properties and to develop computer modelling for the different cross-section of rolling profile.

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29

Zhao, Ying, Jiahao Chen, Qiang Zhou, Xiaohan Jia, and Xueyuan Peng. "Numerical Simulation and Experimental Validation of the Vibration Modes for a Processing Reciprocating Compressor." Shock and Vibration 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/5327326.

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The low-order vibration modes of a reciprocating compressor were studied by means of numerical simulation and experimental validation. A shell element model, a beam element model, and two solid element models were established to investigate the effects of bolted joints and element types on low-order vibration modes of the compressor. Three typical cases were compared to check the effect of locations of moving parts on the vibration modes of the compressor. A forced modal test with the MRIT (Multiple References Impact Test) technique was conducted to validate the simulation results. Among four numerical models, the solid element model with the bolt-pretension method showed the best accuracy compared with experimental data but the worst computational efficiency. The shell element model is recommended to predict the low-order vibration modes of the compressor with regard to effectiveness and usefulness. The sparsely distributed bolted joints with a small bonded region on the contact surface were key bolted joints that had greater impacts on the low-order vibration modes of the compressor than the densely distributed bolted joints. The positions of the moving parts had little effect on the low-order vibration modes of the compressor.

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30

Semenova, Elena, Nikita Kharin, Pavel Bolshakov, Anastasiya Ivanova, and Viktoriya Yaikova. "Automatic processing and analysis of the structural properties of bone tissue." MATEC Web of Conferences 329 (2020): 03077. http://dx.doi.org/10.1051/matecconf/202032903077.

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The volumetric distribution of bone tissue can be analysed in terms of orthotropic medium. In this case, it is important to define the orthotropic directions. Nowadays, computed tomography methods allow getting such information. The method for automation such analysis is presented. Firstly, the threshold of binarization should be calculated. Then the sample should be meshed and each element should be binarized. After that fabric tensor, eigenvalues, eigenvectors and fractional anisotropy can be calculated for each element. Statistical methods were used to analyse the field of the obtained data. Described methods were used on a bone sample. It was shown that for a sample the fabric tensor is constant and the fractional anisotropy is close to zero. That’s means that the medium in the sample was isotropic.

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31

Vorotnev, D. V., R. V. Golovanov, D. A. Kuznetsov, K. V. Panfilova, S. V. Umnyashkin, and I. O. Sharonov. "OPENVX STANDARD TENSOR IMPLEMENTATION FOR ARTIFICIAL NEURAL NETWORKS ON SPECIALIZED PLATFORMS." Issues of radio electronics, no. 8 (August 20, 2018): 104–11. http://dx.doi.org/10.21778/2218-5453-2018-8-104-111.

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NNE extension for OpenVX 1.2 standard adds functions that implement layers of artificial neural networks. Each layer receives a tensor object as input, processes it and passes the result tensor to the next layer. Implementation recommendations and hardware optimization of tensor processing functions were proposed. The types of data supported by the OpenVX standard for creating of tensors are given, and the operations for processing them are described. The mathematical and software models of tensors are described in detail, which allow performing element-by-element processing. A new program model of the tensor is proposed, which allows to reduce the implementation of functions for processing tensors to the re-invocation of functions for image processing of the OpenVX standard. There are a detail description of functions algorithms from NNE extension based on the proposal method in the paper. Advantages and disadvantages of considered approach function implementation were shown.

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32

Dong, Youkou, Dingtao Yan, and Lan Cui. "An Efficient Parallel Framework for the Discrete Element Method Using GPU." Applied Sciences 12, no. 6 (March 18, 2022): 3107. http://dx.doi.org/10.3390/app12063107.

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The discrete element method (DEM), a discontinuum-based method to simulate the interaction between neighbouring particles of granular materials, suffers from intensive computational workload caused by massive particle numbers, irregular particle shapes, and complicated interaction modes from the meso-scale representation of the macro information. To promote the efficiency of the DEM and enlarge the modelling scales with a higher realism of the particle shapes, parallel computing on the graphics processing unit (GPU) is developed in this paper. The potential data race between the computing cores in the parallelisation is tackled by establishing the contact pair list with a hybrid technique. All the computations in the DEM are made on the GPU cores. Three benchmark cases, a triaxial test of a sand specimen, cone penetration test and granular flow due to a dam break, are used to evaluate the performance of the GPU parallel strategy. Acceleration of the GPU parallel simulations over the conventional CPU sequential counterparts is quantified in terms of speedup. The average speedups with the GPU parallelisation are 84, 73, and 60 for the benchmark cases.

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33

Li, Qing Ying, Tian Bai, and Chun Ling Zhu. "Deicing Excitation Simulation and Structural Dynamic Analysis of the Electro-Impulse Deicing System." Applied Mechanics and Materials 66-68 (July 2011): 390–95. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.390.

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A two-dimensional electromagnetic eddy current field analysis model of the experimental electro-impulse deicing system (EIDI) is developed. Additionally, a numerical post-processing method is proposed to calculate the deicing excitation exerting on the testing skin. Moreover, a three-dimensional dynamic analysis finite element model of the testing skin loaded the excitation is built for evaluating the response accelerations. Then, the calculated accelerations are compared with the experimental measured data to validate the correctness of the proposed methods. It is obtained that the results agree well, which indicates that it is feasible to use the method of post-processing pressure distribution for solving the deicing excitation and the method of structural dynamic finite element analyzing the testing skin for simulating dynamic response. The presented methods pave a way for ice failure analysis of the EIDI system.

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34

Ge, Dong-Yuan, Xi-Fan Yao, Wen-Jiang Xiang, En-Chen Liu, and Zhi-Bin Xu. "Theory and Method of Data Collection for Mixed Traffic Flow Based on Image Processing Technology." Mathematical Problems in Engineering 2021 (June 22, 2021): 1–8. http://dx.doi.org/10.1155/2021/9966494.

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As a key element of ITS (intelligent traffic systems), traffic information collection facilities play a key role, with ITS being able to analyze the state of mixed traffic more appropriately and can provide effective technical support for the design, management, and the evaluation of constructions. Traffic Infrastructure. Focusing on image processing technology, this study takes pedestrians, electric motor, and vehicles in mixed traffic flow as the research object, and Gaussian mixed model, Kalman filtering, and Fisher linear discriminant are introduced in the recognition system. On this basis, the mixed motion flow data acquisition framework model is elaborated in detail, which includes attribute extraction, object recognition, and object tracking. Given the difficulty in capturing reliable images of objects in real traffic scenes, this study adopted a novel background and foreground classification method with region proposal network so as to decrease the number of regions proposal from 2000 to 300, which can detect objects fast and accurately. Experiments demonstrate that the designed programme can collect the flow data by detecting and tracking moving object in the surveillance video for mixed traffic. Further integration of various modules to achieve integrated collection is another important task for further research and development. In the future, research on dynamic calibration of monocular vision will be carried out for distance measurement and speed measurement of vehicles and pedestrians.

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35

Hamam, Habib. "Rotation Invariant Parallel Signal Processing Using a Diffractive Phase Element for Image Compression." Applied Sciences 12, no. 1 (January 3, 2022): 439. http://dx.doi.org/10.3390/app12010439.

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We propose a new rotation invariant correlator using dimensionality reduction. A diffractive phase element is used to focus image data into a line which serves as input for a conventional correlator. The diffractive element sums information over each radius of the scene image and projects the result onto one point of a line located at a certain distance behind the image. The method is flexible, to a large extent, and might include parallel pattern recognition and classification as well as further geometrical invariance. Although the new technique is inspired from circular harmonic decomposition, it does not suffer from energy loss. A theoretical analysis, as well as examples, are given.

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36

Wang, Xiao Lin, Wei Hua Han, Han Gu, Cun Hu, and Xing Xing Han. "Research on Rolling Element Bearing Fault Diagnosis Based on EEMD and Correlated Kurtosis." Applied Mechanics and Materials 680 (October 2014): 198–205. http://dx.doi.org/10.4028/www.scientific.net/amm.680.198.

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In order to extract the faint fault information from complicated vibration signal of bearing, the correlated kurtosis is introduced into the field of rolling bearing fault diagnosis. Combined with ensemble empirical mode decomposition (EEMD) and correlated kurtosis, a feature extraction method is proposed. According to the method, by EEMD processing a group of intrinsic mode functions (IMFs) are obtained, then the IMF with maximal correlated kurtosis is selected, and the weak fault signal is clearly extracted. The effectiveness of the method is demonstrated on both simulated signal and actual data.

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37

Li, Jun, and Zong Lin Wang. "Force Analysis of the Middle Wall in Multi-Arch Tunnel under Central Hole + CRD Method." Applied Mechanics and Materials 580-583 (July 2014): 1188–91. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.1188.

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arch tunnel construction in the presence of construction mechanics often unclear, the lack of systematic design and construction of the theory can learn. Harbin Clinic Road thesis double-arch tunnel project as the basis, the construction process through its hole + CRD using the finite element simulation analysis and on-site monitoring measurement data processing, engineering arch tunnel song used in the wall study the mechanical properties.

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38

Gao, Ai Hua, Fu Rong Wang, and Jian Xin Zhang. "The Finite Element Simulation of Milling Based on Orthogonal Cutting Model." Advanced Materials Research 499 (April 2012): 208–12. http://dx.doi.org/10.4028/www.scientific.net/amr.499.208.

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The paper make the service life of relieving formed milling cutter as the optimization objective, proceed the simulation study on the mechanical degree of cutter, cutting data. The concrete method is that the orthogonal milling model is established to simulate the simulation milling process, some basic parameters which are obtained in the machining process are analyzed and discussed. The results indicate that the finite element simulation of the metal cutting processing can analyze quantitatively some physical properties, such as the cutting force, stress, strain and so on, the traditional way of qualitative analysis is changed. The state of machining is in favour of grasping in the theory, the theory and technology are provided to establish the proper processing technology strategy.

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39

Tarkowski, Paweł, Ireneusz Malujda, Krzysztof Talaśka, Jan Górecki, Mateusz Kukla, and Dominik Wilczyński. "Recognition of Seat Elements during Production through Image Processing." Applied Mechanics and Materials 816 (November 2015): 35–42. http://dx.doi.org/10.4028/www.scientific.net/amm.816.35.

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The primary aim of the research, whose results are presented in this article, was to investigate the process of visual identification of objects. The objects recognised under this research were passenger seats for mass transit applications. The system presented in this paper is intended to be incorporated in the production process control system. The problem under analysis is based on the need to recognise (identify) an object located in the process area of the machine before proceeding with the process. Neural network was chosen as the adaptive element due to a high degree of similarity between the semi-products. The function of the network was to check if correct element had been fed. The input data fed to the network was the information from processing the photo images of these elements. The results of research as presented in this article are based on a limited set of elements and present the method used for solving the task of identification.

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40

Xia, Lie Xiang, Yan Zhao, Yong Zhong Ma, and Xiao Ning An. "The Present Development Situation of Laser Ultrasonic Nondestructive Testing Signal Processing System." Advanced Materials Research 532-533 (June 2012): 369–73. http://dx.doi.org/10.4028/www.scientific.net/amr.532-533.369.

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Currently, laser ultrasonic nondestructive testing is the best application prospect of nondestructive testing methods. This paper expounds the mechanism and the qualitative analysis of the common defects of the laser ultrasonic inspection and introduces the application of matching pursuit algorithm guided wave testing technology in signal processing. This paper focuses on the laser ultrasonic detection system and analysis of the detected data using the finite element method.

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41

She, Ming Hong, Hong Bing Yang, and Ming Ying She. "Fault Diagnosis Method Based on Embedded Acquisition Equipment and SVM." Advanced Materials Research 468-471 (February 2012): 1681–84. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.1681.

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Fault diagnosis method based on embedded acquisition equipment and SVM is proposed in the paper.The function of the module mainly includes data acquisition, data processing and data storage.SVM is trained by the features and the five states of rolling bearing. The structure of diagnostic model by SVM is defined as 5 input nodes and 5 output nodes,among which 5 input nodes are the features including peak factor,waveform factor,impulse factor,margin factor and kurtosis factor and 5 output nodes are the five states of rolling bearing include normal state, housing washer failure, retainer failure, rolling element failure and inner ring failure.The experimental results show that the diagnostic performance of SVM is effective.

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42

Xu, Bing, and Yong Cai. "A multiple-data-based efficient global optimization algorithm and its parallel implementation for automotive body design." Advances in Mechanical Engineering 10, no. 8 (August 2018): 168781401879434. http://dx.doi.org/10.1177/1687814018794341.

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The purpose of this article is to improve the convergence efficiency of the traditional efficient global optimization method. Furthermore, we try a graphics processing unit–based parallel computing method to improve the computing efficiency of the efficient global optimization method for both mathematical and practical engineering problems. First, we propose a multiple-data-based efficient global optimization algorithm instead of the multiple-surrogates-based efficient global optimization algorithm. Second, a novel graphics processing unit–based general-purpose computing technology is adopted to accelerate the solution efficiency of our multiple-data-based efficient global optimization algorithm. Third, a hybrid parallel computing approach using the OpenMP and compute unified device architecture is adopted to further improve the solution efficiency of forward problems in practical application. This is accomplished by integrating the graphics processing unit–based finite element method numerical analysis system into the optimization software. The numerical results show that for the same problem, the optimal result of the multiple-data-based efficient global optimization algorithm is consistently better than the multiple-surrogates-based efficient global optimization algorithm with the same optimization iterations. In addition, the graphics processing unit–based parallel simulation system helps in the reduction of the calculation time for practical engineering problems. The multiple-data-based efficient global optimization method performs stably in both high-order mathematical functions and large-scale nonlinear practical engineering optimization problems. An added benefit is that the computational time and accuracy are no longer obstacles.

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43

Moncada, Manuel, Patricio Toledo, Fernando Betancourt, and Cristian G. Rodríguez. "Torque Analysis of a Gyratory Crusher with the Discrete Element Method." Minerals 11, no. 8 (August 13, 2021): 878. http://dx.doi.org/10.3390/min11080878.

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Comminution by gyratory crusher is the first stage in the size reduction operation in mineral processing. In the copper industry, these machines are widely utilized, and their reliability has become a relevant aspect. To optimize the design and to improve the availability of gyratory crushers, it is necessary to calculate their power and torque accurately. The discrete element method (DEM) has been commonly used in several mining applications and is a powerful tool to predict the necessary power required in the operation of mining machines. In this paper, a DEM model was applied to a copper mining gyratory crusher to perform a comprehensive analysis of the loads in the mantle, the crushing torque, and crushing power. A novel polar representation of the radial forces is proposed that may help designers, engineers, and operators to recognize the distribution of force loads on the mantle in an easier and intuitive way. Simulations with different operational conditions are presented and validated through a comparison with nominal data. A calculation procedure for the crushing power of crushers is presented, and recommendations for the selection of the minimum resolved particle size are given.

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44

Zhou, Hua, Xiao Tao Wu, Dong Ni Zhou, and Tian Tian. "A Coupling Modeling Method with ANSYS/FLAC^3D and its Application." Applied Mechanics and Materials 170-173 (May 2012): 3402–5. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.3402.

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A coupling modeling method with ANSYS/FLAC3D is put forward aiming at the technical difficulties and deficiencies in pre-processing for complex geologic body and structural engineering with FLAC3D. The coupling procedure is that, firstly, the three-dimension geometry model is built with ANSYS and the model meshes are divided. And secondly, the element and node data of the completed model built in ANSYS are exported. Based on the corresponding relationship of element and node between ANSYS and FLAC3D, the exported data above is transformed by using the interface program in FORTRAN, then the information is imported into FLAC3D. Thus the three-dimension FLAC3D model for complex engineering is generated coupling with ANSYS. With coupling method, the complex three-dimension model of arch dam-foundation system in large-scale hydroelectric project is built, and the results verify the feasibility and effectiveness of the proposed method.

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45

Li, R., R. Quey, Y. Zhang, M. Kobayashi, J. Oddershede, and D. Juul Jensen. "A CPFEM based theoretical analysis of strains resolved by the microstructural feature tracking method." IOP Conference Series: Materials Science and Engineering 1249, no. 1 (July 1, 2022): 012056. http://dx.doi.org/10.1088/1757-899x/1249/1/012056.

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Abstract In this work, it is investigated how grain boundaries influence the local strain determination by the microstructural feature tracking (MFT) algorithm. In this method, tetrahedra are used as the strain calculation unit. We apply the MFT processing procedure on data obtained by a crystal plasticity finite element modeling (CPFEM) simulation to explore the uncertainties in the calculated strains caused by grain boundaries. Effects of tetrahedron types and radius ratios are discussed.

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46

Chen, Xuewen, Yuqing Du, Tingting Lian, Kexue Du, and Tao Huang. "Hot Workability of Ultra-Supercritical Rotor Steel Using a 3-D Processing Map Based on the Dynamic Material Model." Materials 13, no. 18 (September 16, 2020): 4118. http://dx.doi.org/10.3390/ma13184118.

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As a new-type of ultra-supercritical HI-IP rotor steel, X12CrMoWVNbN10-1-1 alloy steel has excellent integrative performance, which can effectively improve the power generation efficiency of the generator set. In this paper, uniaxial thermal compression tests were carried out over a temperature range of 950–1200 °C and strain rates of 0.05–5 s−1 with a Gleeble-1500D thermal simulation testing machine. Moreover, based on hot compression experimental data and the theory of processing diagrams, in combination with the dynamic material model, a three-dimensional (3-D) thermal processing map considering the effect of strain was constructed. It was concluded that optimum thermal deformation conditions were as follows: the temperature range of 1150–1200 °C, the strain rate range of 0.05–0.634 s−1. Through secondary development of the finite element (FE) software FORGE®, three-dimensional thermal processing map data were integrated into finite element software FORGE®. The distributions of instability coefficient and power dissipation coefficient were obtained over various strain rates and temperatures of the Ø 8 × 12 mm cylinder specimen by using finite element simulation. It is shown that simulation results are consistent with the microstructure photos. The method proposed in this paper, which integrates the three-dimensional processing map into the finite element software FORGE® (Forge NxT 2.1, Transvalor, Nice, France), can effectively predict the formability of X12CrMoWVNbN10-1-1 alloy steel.

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47

Mucha, Waldemar, and Wacław Kuś. "FPGA Support in Hybrid Simulation Using Finite Element Method." Solid State Phenomena 260 (July 2017): 105–12. http://dx.doi.org/10.4028/www.scientific.net/ssp.260.105.

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Hybrid simulation, or hybrid testing, is understood here as a numerical technique for investigating dynamic properties of mechanical systems with components that are difficult to model numerically. This technique can be also referred to as hardware-in-the-loop simulation.The idea of hybrid simulation is that the non-linear part of the system that is difficult to model numerically is tested experimentally and the rest of the system is modeled numerically. Therefore two models are created – the experimental model and the analytical model. During the simulation both models are in strict cooperation in order to act like the undivided system.The following paper focuses on utilizing FPGA (field-programmable gate array) in the computations performed in the analytical model. FPGA is an integrated circuit that is configured by the user. Physically FPGA is an array of logic blocks that the user can program and reconfigure interconnects that will allow to connect logic blocks in the desired way in order to perform complex functions. The most important advantages of using FPGA are flexibility, highly parallel data processing (thanks to simultaneous operation of independent circuits), high efficiency and reliability. Therefore complex digital computations that are implemented to FPGA can be executed with great speed.In the presented research the non-experimental part of the mechanical system is modeled using Finite Element Method (FEM). In order to control the experimental model in a closed loop, the FEM computations must be performed in real time. As FEM is computationally demanding method, the computations must be conducted as efficiently as possible in order to enable real-time without losing accuracy. The following paper describes increasing the time performance of the hybrid simulation algorithm by executing it on the microprocessor of a microcontroller equipped with real-time operating system while performing the most computationally demanding operations on the FPGA.

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48

Lyubimtseva, A. V., and A. V. Zaitsev. "Determination of the error from elastic deformations of the technological system by the finite element method." Glavnyj mekhanik (Chief Mechanic), no. 11 (October 7, 2022): 698–704. http://dx.doi.org/10.33920/pro-2-2211-03.

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On the example of the process of machining the statin of an electric motor, the possibility of determining the error from elastic deformations of a technological system by the finite element method is shown. To check the adequacy of the model, a comparative analysis of the calculation results with experimental data was carried out. The results showed that the amount of deviation from roundness obtained as a result of the simulation turned out to be 16% less (0.134 mm) than actually obtained during processing (0.16 mm). Simulation data confirm that the error from elastic deformations of the technological system has a maximum value. The remaining components of the error account for about 16% of the deviation.

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49

Guo, Yuxia, Huiying Mao, Heping Ding, Xue Wu, Yujia Liu, Hongjun Liu, and Shuling Zhou. "Data-Driven Coordinated Development of the Digital Economy and Logistics Industry." Sustainability 14, no. 14 (July 21, 2022): 8963. http://dx.doi.org/10.3390/su14148963.

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With a renewed global scientific and technological revolution and industrial reform, the digital economy, with data resources as the key element, has rapidly developed. This study proposes a data-driven measurement and evaluation method to promote the coordinated development of the digital economy and logistics industry. An evaluation index system is constructed, which comprehensively considers the index dimensions that reflect the development level of the digital economy and logistics industry. A Z-score standardisation method is applied to data processing, to carry out dimensionless standardisation processing of the original index data. A collaborative degree model is constructed to evaluate the collaborative development level of the digital economy and logistics industry composite system. We demonstrate the implementation process of these models using data from Anhui province from 2013 to 2020. The results verify the feasibility of the research method and emphasise that the development level of the composite system of the digital economy and logistics industry in Anhui province shows a fluctuating growth trend, with variations between the types and degrees of collaboration policy; suggestions are made accordingly. This study provides theoretical and methodological support for the coordinated development of the regional digital economy and logistics industry.

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50

Ildar Gabitov, Andrei Negovora, Shamil Nigmatullin, Arseny Kozeev, and Mahmut Razyapov. "Development of a Method for Diagnosing Injectors of Diesel Engines." Communications - Scientific letters of the University of Zilina 23, no. 1 (January 4, 2021): B46—B57. http://dx.doi.org/10.26552/com.c.2021.1.b46-b57.

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The purpose of this study was to improve the diagnostics efficiency of modern diesel engine injectors with electronic controls. Experimental studies, performed using certified specialized equipment of injectors' manufacturers and standard software packages for data analysis, made it possible to prove adequacy of theoretical research and get results that are more accurate. Those results contribute to development of a software product that allows identifying a particular faulty element during the defective injector's operation by using mathematical processing of the diagnostic data obtained when testing the injector. Thus, the time spent to repair the fuel injection system reduces. The developed software product also helps to predict the remaining injector's operational life and prevent possible technical failures during operation.

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