Engineering reports : open access最新文献_第10页

Optimizing Dye Wastewater Purification: Ultrasonic and Flotation With Ozonation Synergy

IF 1.8

Engineering reports : open access Pub Date : 2024-11-10 DOI: 10.1002/eng2.13044

Valentin Romanovski, Marina Pilipenko, Alexandr Dubina, Vitaly Likhavitski, Sergey Volodko, Dmitry Moskovskikh, Elena Romanovskaia

{"title":"Optimizing Dye Wastewater Purification: Ultrasonic and Flotation With Ozonation Synergy","authors":"Valentin Romanovski, Marina Pilipenko, Alexandr Dubina, Vitaly Likhavitski, Sergey Volodko, Dmitry Moskovskikh, Elena Romanovskaia","doi":"10.1002/eng2.13044","DOIUrl":"https://doi.org/10.1002/eng2.13044","url":null,"abstract":"The article presents the results of experimental studies of the efficiency of purification of model and real wastewater from dyeing and finishing industries using pneumatic flotation using an ozone-air mixture instead of air and a combination of ultrasonic treatment and ozonation. The influence of gas mixture consumption, dye concentration, and ozone concentration in the gas mixture on the cleaning efficiency was studied. The purification efficiency was assessed by optical density and COD. By using an ozone-air mixture instead of air in the flotation process, an efficiency increase of up to 12 times was achieved. It has also been shown that wastewater treatment efficiency increases by up to 12% when combining ozone-air flotation with ultrasonic treatment at 630 W and operating frequency 22% ± 10% kHz. This effect may be associated, first of all, with the dispersion of bubbles of the ozone-air mixture, which leads to an increase in their total surface and, accordingly, to the rise in the kinetics of mass transfer—ozone dissolution.","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.13044","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113775","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}

引用次数: 0

Response Surface Methodology Investigation of the Viscosity of Propylene Glycol (100)/Graphene Nanofluid to Determine the Optimal Conditions 响应面方法研究丙二醇（100）/石墨烯纳米流体的粘度以确定最佳条件

IF 1.8

Engineering reports : open access Pub Date : 2024-11-10 DOI: 10.1002/eng2.13032

Raviteja Surakasi, Salah J. Mohammed, Hasan Sh. Majdi, Ali Majdi, Parveen Berwal, Mohammad Amir Khan, Wahaj Ahmad Khan

{"title":"Response Surface Methodology Investigation of the Viscosity of Propylene Glycol (100)/Graphene Nanofluid to Determine the Optimal Conditions","authors":"Raviteja Surakasi, Salah J. Mohammed, Hasan Sh. Majdi, Ali Majdi, Parveen Berwal, Mohammad Amir Khan, Wahaj Ahmad Khan","doi":"10.1002/eng2.13032","DOIUrl":"https://doi.org/10.1002/eng2.13032","url":null,"abstract":"This work adopted response surface methodology (RSM) to analyze the behavior of a nanofluid based on propylene glycol. The laboratory conditions in this investigation involve a temperature range of 40°C–120°C and a weight percentage that varies from 0% to 0.5%. Initially viscosity was predicted using Redwood viscometer using the nanofluid solutions. To find the most accurate predictive model and generate an ideal solution, RSM was used. The current study was inspired by the lack of consistency among laboratory behavior and real-world applications and the statistical-mathematical analysis of modelers' performance, contrast, and motivations. Two-factor interaction (2FI), quadratic, cubic, and quartic models are only a few tested. Investigating and evaluating the different statistical features of these modeling functions is a new contribution to the field. The quartic model represents the characteristics of nanofluids with double the accuracy of other models, as shown by statistical analysis. The R2 coefficient, the coefficient of variation (CV%), and the p-value are compared as metrics for assessing the models. The indexes for the quartic model are 0.9940, 3.53%, and 0.0001, in that order. Nanofluids should have a viscosity of 0.335 m2/s at 120°C along with a weight percentage of 0.5%.","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.13032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113777","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}

引用次数: 0

Performance Evaluation of Polygonal and Cylindrical Ball Mills Using Discrete Element Method

IF 1.8

Engineering reports : open access Pub Date : 2024-11-10 DOI: 10.1002/eng2.13043

Mathew Ndeto Kyalo, James Kuria Kimotho, Hiram Muriithi Ndiritu

{"title":"Performance Evaluation of Polygonal and Cylindrical Ball Mills Using Discrete Element Method","authors":"Mathew Ndeto Kyalo, James Kuria Kimotho, Hiram Muriithi Ndiritu","doi":"10.1002/eng2.13043","DOIUrl":"https://doi.org/10.1002/eng2.13043","url":null,"abstract":"Ball mills are frequently utilized in the chemical and mineral processing industries to reduce the size of particles. In mineral processing, cylindrical rotating mills with wear-resistant materials are used at various operation scales. Polygon-shaped rotating mills are used in artisanal and small-scale mining due to technological and economic reasons. It is imperative to thoroughly evaluate polygon-shaped mills to inform decisions regarding their improvement or replacement based on technological data. Even a minor enhancement in grinding efficiency and mill durability can yield substantial economic and environmental advantages. In this study, the performance of polygonal-shaped mills was evaluated and compared with cylindrical profiles, taking into account power draw, collision energy dissipation, relative wear, and operational stability. The effect of installing lifters in the mills was also assessed. Simulations using the discrete element method (DEM) were carried out to describe the mechanical behavior of grinding media and its interaction with the mill walls. Notably, polygonal-shaped mills without lifters facilitated interparticle interaction with limited centrifuging of particles compared to cylindrical mills without lifters. The installation of lifters in polygonal mills increased interparticle collisions and reduced power draw and wear rate. Cylindrical mills with lifters had high interparticle collisions similar to polygonal profiles but with much lower wear rate and high operational stability.","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.13043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113759","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}

引用次数: 0

The Study of Water Content on the Coal Loading Performance of Thin Coal Seam Shearer Drum by Discrete Element Method (DEM)

IF 1.8

Engineering reports : open access Pub Date : 2024-11-08 DOI: 10.1002/eng2.13046

Kuidong Gao, Wenhe Zhang, Yuanjin Zhang, Weipeng Xu, Liqing Sun

引用次数: 0

Three-Way Equal Filtering Power Divider for Modern Communication Systems

IF 1.8

Engineering reports : open access Pub Date : 2024-11-07 DOI: 10.1002/eng2.13036

Augustine O. Nwajana, Rose Paul

{"title":"Three-Way Equal Filtering Power Divider for Modern Communication Systems","authors":"Augustine O. Nwajana, Rose Paul","doi":"10.1002/eng2.13036","DOIUrl":"https://doi.org/10.1002/eng2.13036","url":null,"abstract":"This article proposes a three-way (3-way) equal filtering power divider (FPD) employing the microstrip compact folded-arms square open-loop resonator (FASOLR). The proposed FPD evenly distributes an input signal into three equal output signals. The design incorporates balanced signal power division, and filtering technology for the removal of unwanted frequency elements and aimed at enhancing signal quality and efficiency in the radiofrequency (RF) front-end of communication systems. The use of FASOLR in the design helps to achieve miniaturization by reducing the device footprint. Keysight's Advanced Design System (ADS) software is used for conducting the design simulations. The proposed FPD features a 2.6 GHz center frequency, with a 0.03 fractional bandwidth. The implementation is carried out on Rogers RT/Duroid 6010LM substrate with a dielectric constant of 10.7, a thickness of 1.27 mm, and a loss tangent of 0.0023. This design includes theoretical calculations, circuit modeling, microstrip layout design, and electromagnetic (EM) simulations. The good agreement between the theoretical and practical results verifies the proficiency of the FPD in delivering equal power outputs at the three output ports, and at the same time filtering out unwanted frequencies as required. The practical responses of the prototype FPD indicate a good return loss of better than 15.5 dB and an insertion loss of better than 4.77 + 0.34 dB. The design prototype achieved a compact size of 0.31 × 0.18 λg. The results reinforce the design's competitive edge in performance and actual footprint. λg is the guided wavelength for the microstrip line impedance at the center frequency of the three-way equal FPD.","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.13036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113040","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}

引用次数: 0

Advanced Mineral Deposit Mapping via Deep Learning and SVM Integration With Remote Sensing Imaging Data

IF 1.8

Engineering reports : open access Pub Date : 2024-11-05 DOI: 10.1002/eng2.13031

Nazir Jan, Nasru Minallah, Madiha Sher, Muhammad Wasim, Shahid Khan, Amal Al-Rasheed, Hazrat Ali

{"title":"Advanced Mineral Deposit Mapping via Deep Learning and SVM Integration With Remote Sensing Imaging Data","authors":"Nazir Jan, Nasru Minallah, Madiha Sher, Muhammad Wasim, Shahid Khan, Amal Al-Rasheed, Hazrat Ali","doi":"10.1002/eng2.13031","DOIUrl":"https://doi.org/10.1002/eng2.13031","url":null,"abstract":"Automating mineral delineation and rock type analysis using remote sensing imaging data is a critical application of machine learning. Traditional machine learning methods often struggle with accuracy and precise map generation. This study aims to enhance performance through a refined deep learning model. In this work, we present a deep learning pipeline to map the mineral deposits in the study area. Initially, we apply a deep convolutional neural network (CNN) to a specialized mineral dataset to map mineral deposits within the study area. Subsequently, we build a hybrid model combining deep CNN layers with a support vector machine (SVM). This merger significantly improves classification accuracy from an initial 92.7% to 95.3%. In our approach, CNN layers function as feature extractors while the SVM serves as the classification model. Moreover, we conduct an evaluation of the SVM using polynomial kernels of degrees 3, 6, 9, and 12. The results indicate that the SVM with a degree of 12 achieved the highest classification accuracy, followed by degrees 9, 6, and 3. Experimental results demonstrate the effectiveness of our proposed method for classifying remote sensing imaging data, showcasing its potential for advancing mineral delineation and rock type analysis.","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.13031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112255","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}

引用次数: 0

Localized Laser Heat Treatment on AISI 1045 Steel Using a LPBF Laser

IF 1.8

Engineering reports : open access Pub Date : 2024-11-04 DOI: 10.1002/eng2.13045

Benjamin Ours, Hammad Ur Rehman, Scott Downard, Timothy Cyders, Brian Wisner

引用次数: 0

Development, implementation, and evaluation of a 3D-printed high-fidelity pediatric mannequin with expected hard-to-intubate airway

IF 1.8

Engineering reports : open access Pub Date : 2024-10-31 DOI: 10.1002/eng2.12975

Luca Puggelli, Marta Mencarelli, Paola Serio, Rocco Furferi, Francesca Amoretti, Yary Volpe

{"title":"Development, implementation, and evaluation of a 3D-printed high-fidelity pediatric mannequin with expected hard-to-intubate airway","authors":"Luca Puggelli, Marta Mencarelli, Paola Serio, Rocco Furferi, Francesca Amoretti, Yary Volpe","doi":"10.1002/eng2.12975","DOIUrl":"https://doi.org/10.1002/eng2.12975","url":null,"abstract":"Clinical simulation is fundamental for the healthcare staff to learn and enhance their procedural skills without causing harm to the patients. Despite its importance, in literature appears a deficiency of pediatric pathological mannequins, especially those simulating difficult airway management due to the obstruction of the passage of tubes, fiberscopes, or catheters. Given the importance of simulating complex scenarios in the medical staff's training, the authors decided to realize a modular high-fidelity pathological mannequin with nasal access using reverse engineering and additive manufacturing techniques within T3Ddy, a joint laboratory between Meyer Children's Hospital of Florence and the Department of Industrial Engineering of the University of Florence. The mannequin is developed from diagnostic images of a significant 30-month-old polymalformative patient also affected by Pierre-Robin syndrome modifying the tracheobronchial tree to reproduce an abnormal status. Rigid parts and silicone cast molds are manufactured using 3D-printed ABS/ASA while platinum-cure-silicones are used for the soft ones. Meyer's anesthesiologists collaborated to the realization providing feedback during design and production. The device is evaluated with a 5-point Likert scale questionnaire and results in a useful tool for the training of procedural skills related to difficult intubation as its realism, anatomical geometry, and tactic feedback are positively evaluated.","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12975","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121487","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}

引用次数: 0

Optimizing Heat Transfer in Heat Pipes Using Hybrid Nanofluids With Multi-Walled Carbon Nanotubes and Alumina

IF 1.8

Engineering reports : open access Pub Date : 2024-10-31 DOI: 10.1002/eng2.13030

Ratchagaraja Dhairiyasamy, Deepika Gabiriel

{"title":"Optimizing Heat Transfer in Heat Pipes Using Hybrid Nanofluids With Multi-Walled Carbon Nanotubes and Alumina","authors":"Ratchagaraja Dhairiyasamy, Deepika Gabiriel","doi":"10.1002/eng2.13030","DOIUrl":"https://doi.org/10.1002/eng2.13030","url":null,"abstract":"This study investigates the thermal performance of heat pipes using hybrid nanofluids composed of multi-walled carbon nanotubes (MWCNT) and aluminum oxide (Al2O3) nanoparticles. The aim was to assess the effects of nanoparticle concentration (0.1%–0.5%), filling ratio (60%–90%), heat input (50–80 W), and inclination angle (0°–90°) on thermal resistance and heat transfer coefficient (HTC). Hybrid nanofluids were prepared using ultrasonic homogenization, and their stability was confirmed by zeta potential analysis, showing a reduction from −60 to −48 mV over 30 days. Experimental results revealed that the thermal resistance decreased with increasing filling ratio and inclination angle, reaching a minimum of 0.80 K/W at a 90° angle, 90% filling ratio, and 80 W heat input. Similarly, the overall HTC increased with these parameters, peaking at 2250 W/m2 K under the same conditions. At a 0.5% nanoparticle concentration, the HTC improved by up to 40% compared with conventional fluids. The thermal conductivity of the hybrid nanofluid also rose significantly, from 0.7 W/m K at 30°C to 1.5 W/m K at 90°C, outperforming distilled water. These findings highlight the potential of hybrid nanofluids to enhance heat pipe efficiency, particularly in high-power applications, by optimizing nanoparticle concentration, filling ratio, and inclination angle.","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.13030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121488","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}

引用次数: 0

Experimental Study on Quick-Locking Reinforcement Model for Local Defects in Pipelines in the Rich Water Area

IF 1.8

Engineering reports : open access Pub Date : 2024-10-29 DOI: 10.1002/eng2.13037

Zhicheng Luo, Xuefeng Yan

引用次数: 0