Comput. Chem. Eng.最新文献

Analysis and Design Methodology of Radial Flux Surface-Mounted Permanent Magnet Synchronous Motors 径向磁通面贴式永磁同步电动机的分析与设计方法

Comput. Chem. Eng. Pub Date : 2023-11-14 DOI: 10.3390/eng4040160

Sergio I. Suriano-Sánchez, Mario Ponce-Silva, Víctor H. Olivares-Peregrino, Susana E. De León-Aldaco, Abraham Claudio-Sánchez, Claudia Cortés-García

{"title":"Analysis and Design Methodology of Radial Flux Surface-Mounted Permanent Magnet Synchronous Motors","authors":"Sergio I. Suriano-Sánchez, Mario Ponce-Silva, Víctor H. Olivares-Peregrino, Susana E. De León-Aldaco, Abraham Claudio-Sánchez, Claudia Cortés-García","doi":"10.3390/eng4040160","DOIUrl":"https://doi.org/10.3390/eng4040160","url":null,"abstract":"Permanent magnet motors have become very important in recent years due to the popularization of electric vehicles in the context of the efforts to transition to zero-emission transportation. This has encouraged researchers and hobbyists to learn about electric motor design. However, designing electric motors is not a simple task, as the information to achieve it is not easily available to everyone and it is usually complicated to understand. For that reason, this paper presents the equations and a basic process to design radial flux surface-mounted PM synchronous motors. This design method is the result of combining and organizing information from previous publications to create a relatively simple design guide. The result is a table of equations and a series of general guidelines that were verified by designing and simulating a 500 W eight-pole 2.6 Nm average torque dual-rotor motor and a 20 W four-pole 106 mNm single-rotor motor. The simulations validated the equations and the design method presented in this paper to be used by those interested in the field of electric motors and vehicles; therefore, in the future, others may contribute with improvements, particularizations or optimizations of this methodology, or even create their own.","PeriodicalId":10630,"journal":{"name":"Comput. Chem. Eng.","volume":"51 33","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134901693","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}

引用次数: 0

Study of the Synthesis Variables in the Preparation of CoAl2O4 Pigment Using Microwaves to Reduce Energetic Consumption 微波制备低能耗煤粉颜料合成参数的研究

Comput. Chem. Eng. Pub Date : 2023-11-14 DOI: 10.3390/eng4040159

Guillermo Paulo-Redondo, Isaac Nebot-Díaz

{"title":"Study of the Synthesis Variables in the Preparation of CoAl2O4 Pigment Using Microwaves to Reduce Energetic Consumption","authors":"Guillermo Paulo-Redondo, Isaac Nebot-Díaz","doi":"10.3390/eng4040159","DOIUrl":"https://doi.org/10.3390/eng4040159","url":null,"abstract":"Due to the importance of optimizing the manufacture of ceramic pigments, motivated by the increase in prices of both raw materials and energy, and the need to control manufacturing parameters to obtain optimal conditions for the preparation of ceramic inks, two synthesis routes (traditional route and coprecipitation) and two calcination methods (traditional oven and microwave oven) are proposed to obtain the blue ceramic pigment CoAl2O4 with the aim of minimizing the use of mineralizers or flux agents and reducing energy consumption in its manufacturing. The pigments prepared were characterized by thermal analysis and structurally by XRD and SEM, with particle sizes below 300 nm observed. Finally, the colorimetric coordinates of glazed tiles with the pigments obtained were characterized. In all cases, the microwave-assisted synthesis increased the color intensity, considerably decreasing the temperature and calcination time, obtaining a particle size under 300 nm with a very narrow size distribution, and substantially improving the energy cost of its preparation and the color development of the final product. The viability of the combination of synthesis by coprecipitation and microwave calcination as a method of industrial preparation of ceramic pigments has been demonstrated.","PeriodicalId":10630,"journal":{"name":"Comput. Chem. Eng.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134900693","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}

引用次数: 0

Remarks on Constitutive Modeling of Granular Materials 颗粒材料本构模型研究述评

Comput. Chem. Eng. Pub Date : 2023-11-14 DOI: 10.3390/eng4040161

Mehrdad Massoudi

引用次数: 0

The Effect of High-Energy Ball Milling of Montmorillonite for Adsorptive Removal of Cesium, Strontium, and Uranium Ions from Aqueous Solution 高能球磨蒙脱土吸附去除水溶液中铯、锶和铀离子的效果

Comput. Chem. Eng. Pub Date : 2023-11-14 DOI: 10.3390/eng4040158

Iryna Kovalchuk, Oleg Zakutevskyy, Volodymyr Sydorchuk, Olena Diyuk, Andrey Lakhnik

{"title":"The Effect of High-Energy Ball Milling of Montmorillonite for Adsorptive Removal of Cesium, Strontium, and Uranium Ions from Aqueous Solution","authors":"Iryna Kovalchuk, Oleg Zakutevskyy, Volodymyr Sydorchuk, Olena Diyuk, Andrey Lakhnik","doi":"10.3390/eng4040158","DOIUrl":"https://doi.org/10.3390/eng4040158","url":null,"abstract":"Clay minerals are widely used to treat groundwater and surface water containing radionuclides. In our study, the method of mechanochemical activation for increasing the sorption capacity of the natural clay mineral montmorillonite was used. By adjusting the grinding time, the increasing sorption parameters of mechanochemically activated montmorillonite were determined. X-ray diffraction method, scanning electron microscopy, and the determination of the specific surface by low-temperature adsorption–desorption of nitrogen to characterize the natural and mechanochemical-activated montmorillonites were used. It was established that the maximal sorption of uranium, strontium, and cesium is found for montmorillonite after mechanochemical treatment for 2 h. It is shown that the filling of the surface of montmorillonite with ions of different natures occurs in various ways during different times of mechanochemical treatment. The appropriateness of the Langmuir and Freundlich models for the sorption parameters of uranium, strontium, and cesium ions on montmorillonite after its mechanochemical activation was established. The effect of natural organic substances—humic acids—on the efficiency of water purification from uranium on mechanoactivated montmorillonite was studied. The obtained sorbents can be effectively used for the removal of trace amounts of radionuclides of different chemical natures (uranium, cesium, and strontium) from polluted surface and ground waters.","PeriodicalId":10630,"journal":{"name":"Comput. Chem. Eng.","volume":"52 43","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134902120","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}

引用次数: 0

Review of Graphene-Based Materials for Tribological Engineering Applications 石墨烯基材料摩擦学工程应用综述

Comput. Chem. Eng. Pub Date : 2023-11-06 DOI: 10.3390/eng4040157

Eduardo Tomanik, Wania Christinelli, Roberto M. Souza, Vanessa L. Oliveira, Fabio Ferreira, Boris Zhmud

引用次数: 0

Machine Learning Study of the Effect of Process Parameters on Tensile Strength of FFF PLA and PLA-CF 工艺参数对FFF PLA和PLA- cf拉伸强度影响的机器学习研究

Comput. Chem. Eng. Pub Date : 2023-11-03 DOI: 10.3390/eng4040156

Abdelhamid Ziadia, Mohamed Habibi, Sousso Kelouwani

{"title":"Machine Learning Study of the Effect of Process Parameters on Tensile Strength of FFF PLA and PLA-CF","authors":"Abdelhamid Ziadia, Mohamed Habibi, Sousso Kelouwani","doi":"10.3390/eng4040156","DOIUrl":"https://doi.org/10.3390/eng4040156","url":null,"abstract":"Material extrusion is a popular additive manufacturing technology due to its low cost, wide market availability, ability to construct complex parts, safety, and cleanliness. However, optimizing the process parameters to obtain the best possible mechanical properties has not been extensively studied. This paper aims to develop ensemble learning-based models to predict the ultimate tensile strength, Young’s modulus, and the strain at break of PLA and PLA-CF 3D-printed parts, using printing temperature, printing speed, and layer thickness as process parameters. Additionally, the study investigates the impact of process parameters and material selection on the mechanical properties of the printed parts and uses genetic algorithms for multi-objective optimization according to user specifications. The results indicate that process parameters and material selection significantly influence the mechanical properties of the printed parts. The ensemble learning predictive models yielded an R2 value of 91.75% for ultimate tensile strength, 94.08% for Young’s modulus, and 88.54% for strain at break. The genetic algorithm successfully identified optimal parameter values for the desired mechanical properties. For optimal ultimate tensile strength, PLA-CF was used at 222.28 °C, 0.261 mm layer, 40.30 mm/s speed, yielding 41.129 MPa. For Young’s modulus: 4423.63 MPa, PLA-CF, 200.01 °C, 0.388 mm layer, 40.38 mm/s. For strain at break: 2.249%, PLA, 200.34 °C, 0.390 mm layer, 45.30 mm/s. Moreover, this work is the first to model the process–structure property relationships for an additive manufacturing process and to use a multi-objective optimization approach for multiple mechanical properties, utilizing ensemble learning-based algorithms and genetic algorithms.","PeriodicalId":10630,"journal":{"name":"Comput. Chem. Eng.","volume":"35 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135868208","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}

引用次数: 0

Pose Detection and Recurrent Neural Networks for Monitoring Littering Violations 姿态检测与递归神经网络监测乱扔垃圾行为

Comput. Chem. Eng. Pub Date : 2023-10-30 DOI: 10.3390/eng4040155

Nyayu Latifah Husni, Okta Felia, None Abdurrahman, Ade Silvia Handayani, Rosi Pasarella, Akhmad Bastari, Marlina Sylvia, Wahyu Rahmaniar, Seyed Amin Hosseini Seno, Wahyu Caesarendra

{"title":"Pose Detection and Recurrent Neural Networks for Monitoring Littering Violations","authors":"Nyayu Latifah Husni, Okta Felia, None Abdurrahman, Ade Silvia Handayani, Rosi Pasarella, Akhmad Bastari, Marlina Sylvia, Wahyu Rahmaniar, Seyed Amin Hosseini Seno, Wahyu Caesarendra","doi":"10.3390/eng4040155","DOIUrl":"https://doi.org/10.3390/eng4040155","url":null,"abstract":"Infrastructure development requires various considerations to maintain its continuity. Some public facilities cannot survive due to human indifference and irresponsible actions. Unfortunately, the government has to spend a lot of money, effort, and time to repair the damage. One of the destructive behaviors that can have an impact on infrastructure and environmental problems is littering. Therefore, this paper proposes a device as an alternative for catching littering rule violators. The proposed device can be used to monitor littering and provide warnings to help officers responsible for capturing the violators. In this innovation, the data obtained by the camera are sent to a mini-PC. The device will send warning information to a mobile phone when someone litters. Then, a speaker will turn on and issue a sound warning: “Do not litter”. The device uses pose detection and a recurrent neural network (RNN) to recognize a person’s activity. All activities can be monitored in a more distant place using IoT technology. In addition, this tool can also monitor environmental conditions and replace city guards to monitor the area. Thus, the municipality can save money and time.","PeriodicalId":10630,"journal":{"name":"Comput. Chem. Eng.","volume":"5 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136023045","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}

引用次数: 0

Finding the Age and Education Level of Bulgarian-Speaking Internet Users Using Keystroke Dynamics 使用击键动态查找保加利亚语互联网用户的年龄和教育水平

Comput. Chem. Eng. Pub Date : 2023-10-25 DOI: 10.3390/eng4040154

Denitsa Grunova, Ioannis Tsimperidis

{"title":"Finding the Age and Education Level of Bulgarian-Speaking Internet Users Using Keystroke Dynamics","authors":"Denitsa Grunova, Ioannis Tsimperidis","doi":"10.3390/eng4040154","DOIUrl":"https://doi.org/10.3390/eng4040154","url":null,"abstract":"The rapid development of information and communication technologies and the widespread use of the Internet has made it imperative to implement advanced user authentication methods based on the analysis of behavioural biometric data. In contrast to traditional authentication techniques, such as the simple use of passwords, these new methods face the challenge of authenticating users at more complex levels, even after the initial verification. This is particularly important as it helps to address risks such as the possibility of forgery and the disclosure of personal information to unauthorised individuals. In this study, the use of keystroke dynamics has been chosen as a biometric, which is the way a user uses the keyboard. Specifically, a number of Bulgarian-speaking users have been recorded during their daily keyboard use, and then a system has been implemented which, with the help of machine learning models, recognises certain acquired or intrinsic characteristics in order to reveal part of their identity. The results show that users can be categorised using keystroke dynamics, in terms of the age group they belong to and in terms of their educational level, with high accuracy rates, which is a strong indication for the creation of applications to enhance user security and facilitate their use of Internet services.","PeriodicalId":10630,"journal":{"name":"Comput. Chem. Eng.","volume":"526 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135168591","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}

引用次数: 0

The Effects of Multistage Fuel-Oxidation Chemistry, Soot Radiation, and Real Gas Properties on the Operation Process of Compression Ignition Engines 多级燃料氧化化学、烟尘辐射和真实气体性质对压缩点火发动机工作过程的影响

Comput. Chem. Eng. Pub Date : 2023-10-23 DOI: 10.3390/eng4040153

Valentin Y. Basevich, Sergey M. Frolov, Vladislav S. Ivanov, Fedor S. Frolov, Ilya V. Semenov

{"title":"The Effects of Multistage Fuel-Oxidation Chemistry, Soot Radiation, and Real Gas Properties on the Operation Process of Compression Ignition Engines","authors":"Valentin Y. Basevich, Sergey M. Frolov, Vladislav S. Ivanov, Fedor S. Frolov, Ilya V. Semenov","doi":"10.3390/eng4040153","DOIUrl":"https://doi.org/10.3390/eng4040153","url":null,"abstract":"The objectives of the study are to reveal the influence of multistage fuel-oxidation chemistry, thermal radiation of soot during the combustion of a small (submillimeter size) fuel droplet, and real gas effects on the operation process of compression ignition engines. The use of the multistage oxidation chemistry of iso-octane in the zero-dimensional approximation reveals the appearance of different combinations of cool, blue, and hot flames at different compression ratios and provides a kinetic interpretation of these phenomena that affect the heat release function. Cool flames are caused by the decomposition of alkyl hydroperoxide, during which a very reactive radical, OH, is formed. Blue flames are caused by the decomposition of H2O2 with the formation of OH. Hot flames are caused by the chain branching reaction between atomic hydrogen and molecular oxygen with the formation of OH and O. So-called “double” cool flames correspond to the sequential appearance of a separated cool flame and a low-intensity blue flame rather than two successive cool flames. The use of a one-dimensional model of fuel droplet heating, evaporation, autoignition, and combustion at temperatures and pressures relevant to compression ignition engines shows that the thermal radiation of soot during the combustion of small (submillimeter size) droplets is insignificant and can be neglected. The use of real gas caloric and thermal equations of state of the matter in a three-dimensional simulation of the operation process in a diesel engine demonstrates the significant effect of real gas properties on the engine pressure diagram and on the NO and soot emissions: real gas effects reduce the maximum pressure and mass-averaged temperature in the combustion chamber by about 6 and 9%, respectively, increases the autoignition delay time by a 1.6 crank angle degree, increase the maximum heat release rate by 20%, and reduce the yields of NO and soot by a factor of 2 and 4, respectively.","PeriodicalId":10630,"journal":{"name":"Comput. Chem. Eng.","volume":"40 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135413243","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}

引用次数: 0

Self-Directed Mobile Robot Navigation Based on Functional Firefly Algorithm (FFA) 基于功能萤火虫算法(FFA)的移动机器人自主导航

Comput. Chem. Eng. Pub Date : 2023-10-18 DOI: 10.3390/eng4040152

Bhumeshwar K. Patle, Brijesh Patel, Alok Jha, Sunil Kumar Kashyap

{"title":"Self-Directed Mobile Robot Navigation Based on Functional Firefly Algorithm (FFA)","authors":"Bhumeshwar K. Patle, Brijesh Patel, Alok Jha, Sunil Kumar Kashyap","doi":"10.3390/eng4040152","DOIUrl":"https://doi.org/10.3390/eng4040152","url":null,"abstract":"This paper proposes an optimized mobile robot navigation strategy using a functional firefly algorithm (FFA) and choice function. This approach has two key advantages: first, the linear objective function performs efficiently with the single degree and finite-order polynomial time operation, and second, the cartesian constraint performs compactly with the chosen degree of freedom on the finite interval. This functional approach optimizes the size of operational parameters in context with key size, operation time, and a finite range of verification. The choice function achieves parameter order (size) reduction. The attraction characteristic of fireflies is represented by the choice function for optimizing the choice between low and high intensities of fireflies. In 2D and 3D environments, the proposed robot navigation performs well in an uncertain environment with static and dynamic obstacles. This efficiency includes the robot’s speed as determined by the choice function’s minimum path lengths. The collision-free path is achieved by the non-void family of non-void sets. The obtained results are optimal in terms of path length and navigational time. The proposed controller is also compared with the other existing controllers, and it is observed that the FFA gives the shortest path in less time for the same environmental condition.","PeriodicalId":10630,"journal":{"name":"Comput. Chem. Eng.","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135888434","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}

引用次数: 0