International Journal of Advanced Engineering Research and Science最新文献

{"title":"Fabrication of pure porous CuO from microwave-synthesized MOF-199 by calcination in ambient air","authors":"Nam Hồ Phùng Khắc","doi":"10.22161/ijaers.11.1","DOIUrl":"https://doi.org/10.22161/ijaers.11.1","url":null,"abstract":"Metal-organic frameworks with porous characteristics are applied in many fields. This study used it as a superior raw material source for making transition metal oxides. By calcining the copper 1,3,5-benzene tricarboxylate framework in ambient air, copper(II) oxide was produced. The calcination temperature was investigated in the range of 250 to 700 °C. At a calcination temperature of 550 °C, the resultant CuO has a homogeneous size and shape within the 1-2 um range. CuO’s surface area of 33.16 m2/g is more excellent than several other materials and technologies used in CuO manufacture. Utilizing CuO generated by the MOF-199 calcination process for enhanced oxidation catalysis in treating organic gases and vapors is based on the research findings.","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"11 1","pages":"001-006"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147883558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fe3O4.CeO2/SiO2 oxide nanocomposite as a Fenton-like catalyst for degradation of Congo red","authors":"Nguyen Manh Ha, Bui Thi Hai Yen, Vu Ngoc Hai, Tran Ngoc Hieu, Nguyen Thi Phuong","doi":"10.22161/ijaers.114.15","DOIUrl":"https://doi.org/10.22161/ijaers.114.15","url":null,"abstract":"Congo red (CR) was broken down by a heterogeneous Fenton oxidation process using a catalyst that concurrently contained cerium dioxide and ferromagnetic oxide on a silicon dioxide substrate (Fe3O4.CeO2/SiO2). CeO2 was prepared from Ce(NO3)3.6H2O with a carrier SiO2 generated from rice husks; Fe3O4 catalyst was prepared from FeCl3.6H2O and FeCl2.4H2O. X-ray diffraction (XRD), scanning electron microscopy (SEM-EDX), specific surface area (BET), and Fourier transform infrared (FTIR) spectroscopy were used to investigate the catalyst's characteristics. The oxidation of Congo red was used to measure the catalytic activity. Other factors examined included the amount of catalyst, the pH, the H2O2 ratio, and the decomposition duration.","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"1 1","pages":"34-39"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ijaers.com/uploads/issue_files/5IJAERS-104202410-Fe3O4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147912942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Calcium Carbonate on the Properties of Acid Soluble Cement Slurry","authors":"Catherine Ijeoma Mietei-Ileberi, John Vitus Anaele, Samuel S. Mofunlewi","doi":"10.22161/ijaers.11.5","DOIUrl":"https://doi.org/10.22161/ijaers.11.5","url":null,"abstract":"Cementation process in oil well drilling can be challenging, causing serious well control issues. The properties of cement slurry aid the designer to know the accurate dynamic placement of the cement slurry from surface to downhole of the wellbore. It presents the stability of locally sourced CaCO3 and class G cement slurry blend, giving insight to the effective pumpability and setting time for better slurry placement. Utilization of locally source recipes serving as an alternative use to imported additives in the reduction of oilfield cementation operations is imperative, considering the cost of imported chemicals. In this paper, fine CaCO3 identified as an acid-soluble additive was used for the design and formulation of a plug cementation operation through coil tubing for zonal isolations. Four different blends of CaCO3 containing 20%, 25% 30%, 40% BWOC and 100% Class ‘G’ cement used for the experiment at a test temperature of 175degree F BHST and a slurry density of 15.8ppg to ascertain the impact of CaCO3 on the mixability, pumpability, stability on the cement slurry. The placement time and strength data of cement slurry is very crucial to meeting planned cementing schedule. From the thickening time evaluation, at 40BC an average range of 8hrs-11hrs pumpable time was deduced for all blends. However, the point of departure for 30% CaCO3 BWOC showed a better result. The result helped to provide real-time information about the initial compressive strength development in the slurry specimen and this aids in determining waiting on cement time (WOC). It indicates that the more calcium carbonate in the system, the lesser the strength which means that the presence of calcium carbonate reduces the compressive strength in an acid-soluble cement slurry compared to the neat slurry. The paper presents experimental details on the average wait on cement time and the pumpable time for acid soluble cement slurry, contributing to data gathering and proper well planning before execution and. competency in the use of the slurry designs have been established in this work.","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"11 1","pages":"025-033"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147918940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GATCGGenerator: New Software for Generation of Quasirandom Nucleotide Sequences","authors":"O. Yu. Kiryanova, R. R. Garafutdinov, I. M. Gubaydullin, A. V. Chemeris","doi":"10.23947/2687-1653-2023-23-3-296-306","DOIUrl":"https://doi.org/10.23947/2687-1653-2023-23-3-296-306","url":null,"abstract":"Introduction . In recent decades, knowledge about DNA has been increasingly used to solve biological problems (calculations using DNA, long-term storage of information). Principally, we are talking about cases when it is required to select artificial nucleotide sequences. Special programs are used to create them. However, existing generators do not take into account the physicochemical properties of DNA and do not allow obtaining sequences with a pronounced “non-biological” structure. In fact, they generate sequences by distributing nucleotides randomly. The objective of this work is to create a generator of quasirandom sequences with a special nucleotide structure. It should take into account some physicochemical features of nucleotide structures, and it will be involved in storing non-biological information in DNA. Materials and Methods . A new GATCGGenerator software for generating quasirandom sequences of nucleotides was described. It was presented as SaaS (from “software as a service”), which provided its availability from various devices and platforms. The program generated sequences of a certain structure taking into account the guanine-cytosine (GC) composition and the content of dinucleotides. The performance of the new program algorithm was presented. The requirements for the generated nucleotide sequences were set using a chat in Telegram, the interaction with the user was clearly shown. The differences between the input parameters and the specific nucleotide structures obtained as a result of the program were determined and generalized. Also, the time costs of generating sequences for different input data were given in comparison. Short sequences differing in type, length, GC composition and dinucleotide content were studied. The tabular form shows how the input and output parameters are correlated in this case. Results . The developed software was compared to existing nucleotide sequence generators. It has been established that the generated sequences differ in structure from the known DNA sequences of living organisms, which means that they can be used as auxiliary or masking oligonucleotides suitable for molecular biological manipulations (e.g., amplification reactions), as well as for storing non-biological information (images, texts, etc.) in DNA molecules. The proposed solution makes it possible to form specific sequences from 20 to 5 000 nucleotides long with a given number of dinucleotides and without homopolymer fragments. More stringent generation conditions remove known limitations and provide the creation of quasirandom sequences of nucleotides according to specified input parameters. In addition to the number and length of sequences, it is possible to determine the GC composition, the content of dinucleotides, and the nature of the nucleic acid (DNA or RNA) in advance. Examples of short sequences differing in length, GC composition and dinucleotide content are given. The obtained 30-nucleotide sequences were tested. The a","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensitivity of Diffusion-Weighted Image Combined with T2 Turbo Inversion Recovery Magnitude Sequence and as an Alternative to Contrast-Enhanced MRI in the Detection of Perianal Fistula","authors":"Noor Fadhil Baqir, Rasha Sabeeh Ahmed, Khaleel Ibraheem Mohsen","doi":"10.23947/2687-1653-2023-23-3-307-316","DOIUrl":"https://doi.org/10.23947/2687-1653-2023-23-3-307-316","url":null,"abstract":"Introduction . Perianal fistula rapidly develops an abscess, requiring surgical decompression. However, simple cases must be managed. However, for patients with renal insufficiency, MRI with contrast is contraindicated. It is proposed to use diffusion-weighted images that can diagnose anal fistulae, showing areas of high signal intensity (inflammatory tissues). The aim is to determine sensitivity of diffusion-weighted image combined with T2 turbo inversion recovery magnitude and as an alternative technique to contrast-enhanced MRI using clinical examination as a reference. Materials and Methods . Study included fifty patients with a clinical diagnosis of perianal fistula. MRI sequences were T2 turbo inversion recovery magnitude in oblique coronal and axial planes, diffusion-weighted image, and T1 weighted image turbo spin echo (fat suppression) pre- and post-administration of contrast agents in oblique axial planes. Three radiologists evaluated the MR imaging data using a questionnaire of parameters that necessitated a binary response, “yes” or “no” answer. Results. Diffusion-weighted image combined with axial T2 turbo inversion recovery magnitude sequence had 96.7 %. All raters agreed that it is sensitive enough to correctly identify perianal fistula with a moderate Kappa agreement (k = 0.586) and p-value<0.001. The mean value of rater's responses was 76.7 % represents sensitivity of diffusion-weighted images + T2 turbo inversion recovery magnitude as an alternative technique to T1-enhanced contrast with moderate (k = 0.553) agreement between raters and P-value<0.001. Discussion and Conclusion . Diffusion-weighted images and T2 turbo inversion recovery magnitude sequences exhibit comparable efficacy to T1-enhanced contrast sequences in detecting perianal fistula. This may be an option for patients with renal impairment who cannot receive an MRI contrast.","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Model of a Parallel-Pipeline Computational Process for Solving a System of Grid Equations","authors":"V. N. Litvinov, N. B. Rudenko, N. N. Gracheva","doi":"10.23947/2687-1653-2023-23-3-329-339","DOIUrl":"https://doi.org/10.23947/2687-1653-2023-23-3-329-339","url":null,"abstract":"Introduction . Environmental problems arising in shallow waters and caused by both natural and man-made factors annually do significant damage to aquatic systems and coastal territories. It is possible to identify these problems in a timely manner, as well as ways to eliminate them, using modern computing systems. But earlier studies have shown that the resources of computing systems using only a central processor are not enough to solve large scientific problems, in particular, to predict major environmental accidents, assess the damage caused by them, and determine the possibilities of their elimination. For these purposes, it is proposed to use models of the computing system and decomposition of the computational domain to develop an algorithm for parallel-pipeline calculations. The research objective was to create a model of a parallel-conveyor computational process for solving a system of grid equations by a modified alternating-triangular iterative method using the decomposition of a three-dimensional uniform computational grid that takes into account technical characteristics of the equipment used for calculations. Materials and Methods . Mathematical models of the computer system and computational grid were developed. The decomposition model of the computational domain was made taking into account the characteristics of a heterogeneous system. A parallel-pipeline method for solving a system of grid equations by a modified alternating-triangular iterative method was proposed. Results. A program was written in the CUDA C language that implemented a parallel-pipeline method for solving a system of grid equations by a modified alternating-triangular iterative method. The experiments performed showed that with an increase in the number of threads, the computation time decreased, and when decomposing the computational grid, it was rational to split into fragments along coordinate z by a value not exceeding 10. The results of the experiments proved the efficiency of the developed parallel-pipeline method. Discussion and Conclusion . As a result of the research, a model of a parallel-pipeline computing process was developed using the example of one of the most time-consuming stages of solving a system of grid equations by a modified alternating-triangular iterative method. Its construction was based on decomposition models of a three-dimensional uniform computational grid, which took into account the technical characteristics of the equipment used in the calculations. This program can provide you for the acceleration of the calculation process and even loading of program flows in time. The conducted numerical experiments validated the mathematical model of decomposition of the computational domain.","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D Human Motion Capture Method Based on Computer Vision","authors":"A. D. Obukhov, D. L. Dedov, E. O. Surkova, I. L. Korobova","doi":"10.23947/2687-1653-2023-23-3-317-328","DOIUrl":"https://doi.org/10.23947/2687-1653-2023-23-3-317-328","url":null,"abstract":"Introduction. The analysis of approaches to tracking the human body identified problems when capturing movements in a three-dimensional coordinate system. The prospects of motion capture systems based on computer vision are noted. In existing studies on markerless motion capture systems, positioning is considered only in two-dimensional space. Therefore, the research objective is to increase the accuracy of determining the coordinates of the human body in three-dimensional coordinates through developing a motion capture method based on computer vision and triangulation algorithms. Materials and Methods . A method of motion capture was presented, including calibration of several cameras and formalization of procedures for detecting a person in a frame using a convolutional neural network. Based on the skeletal points obtained from the neural network, a three-dimensional reconstruction of the human body model was carried out using various triangulation algorithms. Results. Experimental studies have been carried out comparing four triangulation algorithms: direct linear transfer, linear least squares method, L2 triangulation, and polynomial methods. The optimal triangulation algorithm (polynomial) was determined, providing an error of no more than 2.5 pixels or 1.67 centimeters. Discussion and Conclusion . The shortcomings of existing motion capture systems were revealed. The proposed method was aimed at improving the accuracy of motion capture in three-dimensional coordinates using computer vision. The results obtained were integrated into the human body positioning software in three-dimensional coordinates for use in virtual simulators, motion capture systems and remote monitoring.","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of Dynamic Characteristics of an Automated Position Long-Stroke Pneumatic Actuator of Fabrication System","authors":"D. A. Korotych, V. S. Sidorenko, S. P. Prikhodko","doi":"10.23947/2687-1653-2023-23-3-283-295","DOIUrl":"https://doi.org/10.23947/2687-1653-2023-23-3-283-295","url":null,"abstract":"Introduction . Long-stroke movements in automated pneumatic drives account for a significant number of executive movements in coordinate tables, automated warehouses, cutting machines, etc. Long-stroke movements degrade the dynamic quality and positioning of the drive. This is due to the friction of the piston and the nonlinear characteristics of the compressed gas flow in significant volumes of the pressure and drain cavities of the cylinder. Thus, it seems promising to create an automated position pneumatic actuator for long-stroke movements. This will increase the productivity of processes while providing the declared accuracy. The objective of the work is to obtain a mathematical model and dependences of the critical parameters of the proposed automated position long-stroke pneumatic drive of fabrication system in the areas of acceleration, steady-speed movement, deceleration, and braking. Materials and Methods . The basis for calculations and modeling was the scheme of two trajectories of movement from point A to point E, taking into account the forces expended on these processes. The optimal displacement was determined using the Portnyagin’s principle (i.e., optimal performance). Proportional drive control was presented as a method of achieving the result. For long-stroke drive movements, schematic solution and design scheme were visualized in detail (presented as drawings). An original jet sensor with an internal pneumatic connection and a pneumo-mechanic discrete-proportional device for the control loop performance were proposed. The mathematical model included the movement and braking of the piston, the balance of mass flow, the pressure at points, and the control loop. The system of equations was solved by the Runge — Kutta method in the SimInTech software product. Based on the results of the study of a generalized mathematical model, the dependences of changes in the kinematic, power and pneumatic properties of the drive were constructed in real time during a typical positioning cycle. The information was summarized and presented as a set of graphs. Results. The mathematical model was formed according to a set of calculations. It took into account the dependences characteristic of the movement of the piston of the pneumatic cylinder. The balance of mass flow was investigated by the equations of gas flow during compression in the chamber, through distributors and throttles, in the discharge and drain cavities and in the control device. Inequalities describing the pressures at the points and the control loop were considered. A complex mathematical model was solved in the SimInTech software environment by the Runge — Kutta method with a variable integration step. A fragment of the program was selected as one of the illustrations. It showed that the software used the following indicators for calculations: target and reduced coordinates; absolute gas constant; coefficients of spring stiffness, resistance, adiabatic and viscous friction in t","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of Geometric Characteristics of Cycloidal Profiles of Gerotor Hydraulic Machines","authors":"S. O. Kireev, A. R. Lebedev, M. V. Korchagina","doi":"10.23947/2687-1653-2023-23-3-269-282","DOIUrl":"https://doi.org/10.23947/2687-1653-2023-23-3-269-282","url":null,"abstract":"Introduction . The performance and reliability of gerotor hydraulic machines depend on the geometry of the cycloidal gearing profile. The existing methods of calculating and optimizing the profile parameters are cumbersome, multicriteria and difficult for practical application. Therefore, the problem of creating the methodology for calculating the parameters of the gerotor machine profile suitable for engineering calculations at the stage of conceptual design is a challenge. In this regard, the objective of this work was to modernize the methodology for designing the geometry of the profiles of the end section of hypocycloidal gears used in gerotor hydraulic machines, and to analyze the possibilities of their optimization during preliminary design. In the course of the study, the Mathcad computer mathematics system was used; numerical experiments were carried out to study the influence of geometric profile parameters on the performance and operability of the gerotor hydraulic machine, based on the data obtained and analyzed; recommendations for the design of optimal profiles of the end section of gerotor hydraulic machines were developed. Materials and Methods . Materials included known methods of profile parameters calculation, based on application of classical formulas of hypocycloidal equidistant used for outlining profiles of teeth of working elements of gerotor machines. The basic research method was modeling the gerotor machine profile using Mathcad computer mathematics system. Calculated data were obtained for the selected ranges of varying parameters, processed through the univariate regression analysis. Results. An algorithm for analyzing the tooth profile smoothness was developed. Two target parameters were defined: the cross-sectional area of the end profile, which affects the productivity; the smallest reduced radius of contact that determines operability of the working body. A technique for calculating the target parameters at the early stage of design was proposed. A number of optimal values of profile parameters according to the criteria of productivity and operability of gerotor machine was obtained. The dependences providing the optimum values of profile parameters at the stage of designing were constructed. Discussion and Conclusion . The developed methodology makes it possible to obtain an assessment of the performance and operability of the gerotor hydraulic machine at the design stage of the working body. The research results can be used in mechanical engineering when designing gerotor hydraulic machines in order to improve their technical and operational characteristics.","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of the Sphero-Cylindrical Tool Orientation Angles on Roughness under Processing Complex-Profile Surfaces","authors":"M. R. Gimadeev, A. V. Nikitenko, V. O. Berkun","doi":"10.23947/2687-1653-2023-23-3-231-240","DOIUrl":"https://doi.org/10.23947/2687-1653-2023-23-3-231-240","url":null,"abstract":"Introduction. When milling complex-profile surfaces of parts, the selection of tool trajectories and orientations affect the roughness parameters. However, in the studies devoted to the formation of trajectories, recommendations to provide the quality of microgeometry of surfaces were not taken into account. Moreover, when writing programs for CNC equipment in CAM systems, the limitations of cutting modes were determined exclusively using a geometric approach. It did not take into account the influence of the orientation angles of the sphero-cylindrical tool relative to the normal plane on the quality of surface treatment, namely on roughness. The work was aimed at the creation of the methodology for selecting the limiting values of the orientation angles of a sphero-cylindrical tool to optimize the process of machining spatially complex surfaces. The tasks included achieving the minimum values of the amplitude roughness parameter Rz and determining the effectiveness of various machining paths. Materials and Methods . Methods of correlation and regression analysis were used, the results were compared and generalized. The least-squares method was applied to estimate the parameters of the regression equation. The DMU 50 ecoline processing center was used for the experimental studies. Roughness was measured on a Surfcam 1800 D profilometer. The material of the samples was steel 12X18N10T. The material of the tool was hard alloy 1620 Sandvik with PVD coating (physical vapor deposition, the closest domestic analogue is T15K6). Results . It has been shown in detail how roughness parameters Rz depend on the angle of inclination and the diameter of the tool. Twenty examples were summarized in a table. Natural regression coefficients were calculated using linear and hyperbolic models. It was found that the diameter of the tool had a greater effect on the formation of roughness parameter Rz than the angle of inclination. For a detailed description of the influence features, the coefficients of multiple, partial, paired correlation and multiple determination were compared. The limitations associated with the angles of inclination of the tool when processing complex surfaces were determined. A scheme for calculating the angle of the normal was visualized, which included the selected step along the axis to determine the lengths of the segments of the broken curve. The profilograms of surfaces obtained with different shaping trajectories were given in the form of drawings. This allowed us to conclude that milling from top to bottom is unsuitable when the tool is tilted 5°– 35°. A map has been compiled by which it is possible to judge the roughness, knowing the type of milling and the inclination angle (from 5° to 80 °). The dependence of the roughness parameter on the processing speed and the use of coolant was represented graphically. The calculated parameters for determining the optimal angle of inclination of the tool were tabulated. Their analysis proved t","PeriodicalId":13758,"journal":{"name":"International Journal of Advanced Engineering Research and Science","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135426431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}