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Influence of ZnO Nanoparticle Dispersed Baheda Oil Biodiesel Blend in Variable Compression Ratio Diesel Engine: Vibration and Noise Assessment

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Journal of The Institution of Engineers (India): Series C 2021年第4期102卷 941-949页

作者： Sanatha, Kaki Bhatti, Sukhvinder Kaur Jaikumar, Sagari Engineering and Technology Program Rushikonda Visakhapatnam India Department of Mechanical Engineering Andhra University Visakhapatnam India Department of Mechanical Engineering GITAM Institute of Technology Visakhapatnam India

The present study is intended for the vibration and noise analysis of variable compression ratio diesel engine operating with zinc oxide (ZnO) nanoparticle dispersed with Baheda oil biodiesel blend (BOME20). The ZnO nanoparticles were taken at the following proportions of 50 ppm, 75 ppm, and 100 ppm. Further, the QPAN dispersant was added to nanoparticles at 1:1 ratio. The compression ratio was altered from 16.5 to 19.5 by keeping the speed constant at 1500 rpm. The vibration (velocity) and noise characteristics were stated in terms of RMS values. The RMS velocity together with RMS noise was seen lower for B20 than diesel fuel. Further, the dispersion of nanoparticles has depicted a significant reduction in vibration and noise. The least RMS velocity and RMS noise was attained with BOME20 + 75 ppm ZnO + 75 ppm DSP compared to other fuels. But the compression ratio enhancement has shown a gradual increase in vibration and noise. At a compression ratio of 16.5, the lower intensity of vibration and noise of BOME20 + 75 ppm ZnO + 75 ppm DSP were 0.0792 m/sec and 55.2 dB, respectively. © 2021, The Institution of Engineers (India).

关键词： Biodiesel

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A Systematic Evaluation of Clustering Algorithms Against Expert-Derived Clustering

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Operations Research Forum 2025年第2期6卷 1-24页

作者： Mikrou, Ioannis Sapidis, Nickolas S. Department of Mechanical Engineering University of Western Macedonia ZEP Kozani 50100 Greece Postgraduate Masters Program “Quality Management and Technology” Hellenic Open University Par. Aristotelous 18 Patras 26335 Greece

Clustering algorithms have long sought to replicate human expertise in data clustering. This research utilizes six mechatronic products and a team of domain experts to assess how closely the results of six clustering algorithms align with expert-generated outcomes. This comparison of clustering results includes validation indices, the analysis of component migrations between the generated clusters, and optical inspection. The mechatronic products were selected for their complex nature, which provides a challenging context for the clustering analysis. The algorithms used in this research are Ward’s method (WARD), partitioning around medoids (PAM), K-means (K-MEANS), divisive analysis (DIANA), density-based spatial clustering of applications with noise (DBSCAN), and clustering by fast search and find of density peaks (DPC), and the validation indices employed to evaluate the clustering results are the silhouette coefficient (SC) and the composed density between and within clusters (CDbw). © The Author(s) 2025.

关键词： Clustering performance DSM models Human expert benchmarks Machine learning Mechatronics

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Exploring Irradiation as a Means to Toughen and Improve the Impact Resistance of Dolomite Filled PP/r-PET Composites

Exploring Irradiation as a Means to Toughen and Improve the ...

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Green Materials and Electronic Packaging Interconnect technology Symposium, EPITS 2024

作者： Ibrahim, Ismail Ramalingam, Aiswaria Mohammad Shirajuddin, Siti Salwa Abdul Razak, Mohd Fairul Sharin Zainol, Mohd Hafiz Kaew-On, Jatuporn Faculty of Chemical Engineering & Technology University Malaysia Perlis Perlis Kangar01000 Malaysia Agency Nucklear Malaysia Selangor Kajang43000 Malaysia Mechanical Engineering Program Faculty of Engineering Thaksin University of Thailand Khao Rup Chang Thailand

ISBN: (纸本)9789819628704

This study investigates the effects of irradiation on the mechanical properties of dolomite-filled polypropylene (PP)/recycled polyethylene terephthalate (r-PET) composites across varying filler ratios. Composites with PP/r-PET ratios of 100/0, 90/10, 80/20, 70/30, and 60/40, each containing 3% dolomite, were subjected to irradiation doses of 0, 30, and 90 kGy. Tensile and impact tests, along with scanning electron microscopy (SEM) for surface morphology analysis, were employed to investigate performance changes post-irradiation. It is expected that the composite with a 90/10 PP/r-PET ratio at a 30 kGy dose will demonstrate the highest tensile and impact strengths, while increased irradiation doses are predicted to reduce mechanical properties across other ratios. For raw PP, elongation at break is anticipated to reach its peak post-irradiation, with the 90 kGy dose likely yielding the highest Young’s modulus. Morphologically, non-irradiated samples are expected to exhibit fewer microcracks and retain greater structural integrity. Overall, the study aims to elucidate how irradiation influences the enhancement or reduction of mechanical properties in these composites, dependent on composition and irradiation dose. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Polyethylenes

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Development of an embedded system for monitoring a solar power plant in the Amazon region 15

Development of an embedded system for monitoring a solar pow...

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15th IEEE International Conference on Industry Applications, INDUSCON 2023

作者： Lisboa, Yasmim Santos, Lucas Lobato, Ellen Fonseca, Wellington Silva, Kaylane Rodrigues, Iris de Oliveira e Silva, Marcelo Institute of Technology Federal University of Pará Pará Brazil Mechanical Engineering Graduate Program Federal University of Pará Belém Brazil

ISBN: (纸本)9798350314182

The present work deals with the development of an embedded Internet of Things (IoT) system for monitoring the temperature of a photovoltaic system at different points, to enable the analysis of the efficiency of the solar system based on the thermal effect, considering the characteristics climate in the Amazon region. The module created was built and installed in a photovoltaic solar plant located at the Federal University of Pará. For the analyses, the regions of interest for monitoring the panels were considered, which are: the surface of the generator module in contact with the sun;the shaded area of the panel and the ambient temperature. Satisfactory results were obtained regarding the operation of the embedded system, which proved to be ideal for monitoring solar panels due to the ease of updating, communication, and data visualization. ©2023 IEEE.

关键词： ESP32 Industry 4.0 Internet of Things MQTT Photovoltaic

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Fluid Flow and Mixed Heat Transfer in a Horizontal Channel with an Open Cavity and Wavy Wall

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Intelligent Automation & Soft Computing 2023年第7期37卷 147-163页

作者： Tohid Adibi Shams Forruque Ahmed Omid Adibi Hassan Athari Irfan Anjum Badruddin Syed Javed Department of Mechanical Engineering University of BonabBonabIran Science and Math Program Asian University for WomenChattogramBangladesh Energy Management Group Energy and Environment Research CenterNiroo Research InstituteTehranIran Department of Mechanical Engineering Elm-o-Fann University College of Science and TechnologyUrmiaIran Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha61421Saudi Arabia

Heat exchangers are utilized extensively in different industries and ***,optimizing heat exchangers has been a major concern among *** various studies have been conducted to improve the heat transfer rate,the use of a wavy wall in the presence of different types of heat transfer mechanisms has not been *** study thus investigates the mixed heat transmission behavior of fluid in a horizontal channel with a cavity and a hot,wavy *** fluid flow in the channel is considered laminar,and the governing equations including continuity,momentum,and energy are all solved *** numerical solution is stabilized by using a first-order multi-dimensional characteristic-based scheme in combination with a fifth-order Runge-Kutta *** flow and heat transfer effects of varying Richardson numbers,Reynolds numbers,wave amplitude,wavelength,channel height,and cavity width are *** results indicate that the mean Nusselt number increases with an increase in Reynolds number,wave amplitude,and cavity width,while it decreases with an increase in Richardson number,wavelength,and channel *** minimum Nusselt number is calculated to be 0.7,whereas the maximum Nusselt number is *** Nusselt number has only increased by 40%in the higher depths of the cavity,despite the Richardson number being 10,000 times *** this figure increases to 130%at lower *** mean Nusselt number is thus significantly influenced by channel height and cavity *** influence of wave amplitude on the mean Nusselt number is twice that of wavelength.

关键词： Mixed heat transfer wavy wall horizontal channel open cavity numerical simulation

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Developing a Floating Robot for mechanical Control of Water Hyacinth 3

Developing a Floating Robot for Mechanical Control of Water ...

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3rd International Mobile, Intelligent, and Ubiquitous Computing Conference, MIUCC 2023

作者： Elsayed, Mostafa E.A. Mohamed, Ahmed K.A. Shaaban, Mahmoud Abdelrahman, Mohamed A. Ahmed, Mohamed E. A. E. Rashed, Mostafa R. Benha University Automation and Energy Technology Lab. Shoubra Faculty of Engineering Mechanical Engineering Department Cairo Egypt Benha University Agricultural Power and Machinery Faculty of Agriculture Department of Agricultural Engineering Kalubia Egypt School of Engineering and Applied Sciences Nile University Smart Engineering Systems Center Mechanical Engineering Program Giza Egypt Benha University Combustion and Energy Technology Lab. Shoubra Faculty of Engineering Mechanical Engineering Department Cairo Egypt Benha University Shoubra Faculty of Engineering Mechanical Engineering Department Cairo Egypt University for Technology and Information Faculty of Engineering Modern Mechanical Engineering Department Cairo Egypt

ISBN: (纸本)9798350306231

Water hyacinth has become widespread in freshwater bodies in several countries, leading to various issues, particularly its substantial water consumption and the resulting need to control its growth. Among the different methods of controlling water hyacinth, mechanical control stands out as the most effective and environmentally friendly approach. A proposed harvester robot has been developed, capable of efficiently cutting and collecting water hyacinth from the water's surface. The robot boasts several advantages, including its ability to operate in narrow water paths and lakes, use clean energy sources to preserve the water ecology, employ a GPS module for safety and error detection, and generate maps for evaluating work and predicting annual growth. When compared to other technologies dealing with water hyacinth, this innovative water hyacinth harvesting robot presents a significantly lower cost of 0.01 /kg, making it an optimal solution for addressing water hyacinth problems. © 2023 IEEE.

关键词： Weed control

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An expandable chamber for safe brain retraction: new technologies in the field of transcranial endoscopic surgery

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第4期24卷 326-335页

作者： Elena ROCA Anna GOBETTI Giovanna CORNACCHIA Oscar VIVALDI Barbara BUFFOLI Giorgio RAMORINO Head and Neck Department NeurosurgeryIstituto Ospedaliero Fondazione Poliambulanza25124 BresciaItaly Technology for Health PhD Program University of Brescia25124 BresciaItaly Materials Science and Technology at Department of Mechanical and Industrial Engineering University of Brescia25123 BresciaItaly Metallurgy at Department of Mechanical and Industrial Engineering University of Brescia25123 BresciaItaly Anatomy and Physiopathology Division Department of Clinical and Experimental SciencesUniversity of Brescia25123 BresciaItaly

Neurosurgery is a highly specialized field:it often involves surgical manipulation of noble structures and cerebral retraction is frequently necessary to reach deep-seated brain *** are still no reliable methods preventing possible retraction *** objective of this study was to design work chambers well suited for transcranial endoscopic surgery while providing safe retraction of the surrounding brain *** chamber is designed to be inserted close to the intracranial point of interest;once it is best placed it can be *** should guarantee an appreciable workspace similar to that of current neurosurgical *** experimental aspect of this study involved the use of a force sensor to evaluate the pressures exerted on the brain tissue during the retraction *** pterional craniotomy,pressure measurements were made during retraction with the use of a conventional metal spatula with different *** that,although the force values necessary for retraction and exerted on the spatula by the neurosurgeon are the same,the local pressure exerted on the parenchyma at the edge of the spatula at different inclinations varied greatly.A new method of cerebral retraction using a chamber retractor(CR)has been designed to avoid any type of complication due to spatula edge overpressures and to maintain acceptable pressure values exerted on the parenchyma.

关键词： Brain retraction Spatula Brain retractor design Brain retraction injury Retraction complication Transcranial endoscopic surgery

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Bioprinting Methods for Fabricating In Vitro Tubular Blood Vessel Models

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Cyborg and Bionic Systems 2023年第1期4卷 178-195页

作者： Seon-Jin Kim Min-Gyun Kim Jangho Kim Jessie SJeon Jinsoo Park Hee-Gyeong Yi Department of Rural and Biosystems Engineering College of Agriculture and Life SciencesChonnam National UniversityGwangjuRepublic of Korea Department of Convergence Biosystems Engineering College of Agriculture and Life SciencesChonnam National UniversityGwangjuRepublic of Korea Interdisciplinary Program in IT-Bio Convergence System Chonnam National UniversityGwangju 61186Republic of Korea Department of Mechanical Engineering Korea Advanced Institute of Science and TechnologyDaejeonRepublic of Korea Department of Mechanical Engineering Chonnam National UniversityRepublic of Korea

Dysfunctional blood vessels are implicated in various diseases,including cardiovascular diseases,neurodegenerative diseases,and *** studies have attempted to prevent and treat vascular diseases and understand interactions between these diseases and blood vessels across different organs and *** studies were conducted using 2-dimensional(2D)in vitro and animal ***,these models have difficulties in mimicking the 3D microenvironment in human,simulating kinetics related to cell activities,and replicating human pathophysiology;in addition,3D models involve remarkably high ***,in vitro bioengineered models(BMs)have recently gained *** created through biofabrication based on tissue engineering and regenerative medicine are breakthrough models that can overcome limitations of 2D and animal *** can also simulate the natural microenvironment in a patient-and target-specific *** this review,we will introduce 3D bioprinting methods for fabricating bioengineered blood vessel models,which can serve as the basis for treating and preventing various vascular ***,we will describe possible advancements from tubular to vascular ***,we will discuss specific applications,limitations,and future perspectives of fabricated BMs.

关键词： Blood organs printing

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The Effects of Externally Magnetic Fields and Electrically Conducting Lubricants at Transient Squeeze MEHL Motion with Elastic Coating

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Journal of the Chinese Society of mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao 2022年第1期43卷 29-35页

作者： Chu, Li-Ming Chang, Yuh-Ping Cai-Wan, Chang-Jian Interdisciplinary Program of Green and Information Technology National Taitung University Taitung95092 Taiwan Department of Mechanical Engineering Kun Shan University Tainan71070 Taiwan Department of Mechanical and Automation Engineering I-Shou University Kaohsiung84001 Taiwan

The pure squeeze magneto-elastohydrodynamic lubrication (MEHL) motion of point contacts with an electrically conducting fluid in transverse magnetic field on elastic coating is explored under constant load process. The modified Reynolds, the rheology, the force balance, and the elastic deformation equations must be solved simultaneously to obtain the transient pressure profiles, film shapes, elastic deformation, and normal squeeze velocities. The differences between classical EHL and MEHL are discussed during the pure squeeze process. The simulation results reveal that the effect of externally applied magnetic field is equivalent to enhancing the effective lubricant viscosity. Therefore, as the Hartmann number (M) increases, the effect becomes more obvious. The larger the Hartmann number, the thicker the central film thickness and minimum film thickness, the smaller the maximum central pressure, the later the maximum central pressure and the dimple are formed, the smaller the central normal squeeze velocity. The central pressure decreases with increasing M at the initial stage. The central pressure increases with increasing M at the deformation stage. © 2022, Chinese mechanical engineering Society. All right reserved.

关键词： Magnetos

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Nano-Ceramic Coating's Critical Contribution to Protect Centrifugal Pump Under Difficult Operating Conditions

Nano-Ceramic Coating's Critical Contribution to Protect Cent...

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2024 Advances in Science and engineering technology International Conferences, ASET 2024

作者： Albtoush, Ahmed Almajali, Mohammed Almomani, Hesham Almahadin, Aziz Mutah University Mechanical Engineering Department Karak Jordan Rabdan Academy Defence and Security Program Abu Dhabi United Arab Emirates Hashmite University Industrial Engineering Department Zarqa Jordan Higher Colleges of Technology Faculty of Engineering Technology & Science Dubai United Arab Emirates

ISBN: (纸本)9798350344134

This work is done to investigate and assess the beneficial role and added value of employing a thin layer of nano-ceramic coating to protect the components of a centrifugal pump. A case study is considered, representing a centrifugal pump operating in the Arab Potash Company (APC). The ANSYS software package was used which implements numerical finite element analysis (FEA), 3D modeling, and mathematical simulations. Variables, including Von Mises stresses, deformations, and strains, were investigated associated with a number of situations related to the operation of corrosive potash salt and coating layer. Based on the numerical analysis, the research results revealed that employing a thin layer of ceramic coating protective layer could minimize the dynamic Von Mises strength's impact on the centrifugal pump's impeller and casing by 35.55%. Furthermore, it was found that utilizing a protective layer of thin-nano ceramic could alleviate the total deformations of the centrifugal pump's impeller and casing by 67.01%. It was found that using a protective layer of the thin nano-ceramic could mitigate the equivalent elastic strain on the centrifugal pump's impeller and casing by 90.14%. It was noted that maximum total deformations occur at the tip of the blades. Coating the centrifugal pump parts could improve its components' lifespan by reducing wear, corrosion, and abrasion rates. © 2024 IEEE.

关键词： Abrasion

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