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8th International Conference of Precision Machinery and Manufacturing Technology, ICPMMT 2023

作者： Chang, K.H. Huang, B.C. Teng, H.Y. Tzou, G.Y. Department of Mold and Die Engineering National Kaohsiung University of Science and Technology Sanmin Kaohsiung City807618 Taiwan Department of Mechanical Engineering Institute of Mechatronic Engineering Cheng Shiu University Niaosong Kaohsiung83347 Taiwan School of Mechanical Materials Mechatronic and Biomedical Engineering Faculty of Engineering and Information Sciences University of Wollongong Northfields Ave. WollongongNSW2522 Australia

This research considering constant shear friction is to explore the rotating extrusion of thin-walled round tube based on FEM simulation and slab method, and compares the results of both models to realize the variations and acceptance. The effective stress, the effective strain, the velocity field, the average thickness, the extrusion force, and the extrusion torque can be obtained from this study. It reveals the average thickness obtained from rotating extrusion is more uniform than that obtained from no rotating extrusion. The FEM optimization for extrusion force can be combined with Taguchi method, the L934 orthogonal table considers the four control factors which are outer diameter to thickness ratio, frictional factor, rotating angular velocity, half die angle, and three levels. The ranking of influence factors and the optimization combination can be obtained from FEM simulation optimization. Eventually the extrusion force between FEM simulation and slab method is compared under rotating angular velocity, 0.2 rad/s, the maximum error is 10.49 % and the minimum error is -0.29%;the average error is 4.16%, so the trend is in good agreement each other. Therefore, the both models can be verified. © Published under licence by IOP Publishing Ltd.

关键词： Extrusion

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Adaptive Tip Trajectory Generation for Zig-Zag Soft Actuators using Modular Strain-limiting Layer Design

Adaptive Tip Trajectory Generation for Zig-Zag Soft Actuator...

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IEEE International Conference on Soft Robotics (RoboSoft)

作者： P. D. S. H. Gunawardane D. Lee P. Cheung H. Zhou G. Alici M. Chiao Department of Mechanical Engineering University of British Columbia Canada School of Mechanical Material Mechatronic and Biomedical Engineering University of Wollongong Australia

ISBN: (数字)9798331520205

ISBN: (纸本)9798331520212

Soft pneumatic actuators (SPAs) made from compliant materials are increasingly being used as alternatives to rigid robotic actuators, particularly in applications requiring greater flexibility, adaptability, and compliance. A typical SPA incorporates a single strain-limiting layer (SLL), which helps maintain the actuator’s structural integrity and regulates its deformation to control motion. These SLLs are constructed from materials with specific elastic moduli, causing the SPA’s tip to follow a predetermined trajectory. However, in dynamic environments where varied tasks such as versatile in-hand manipulation are required, a single trajectory is insufficient. To address this, we present a novel modular press-fittable SLL design for Zig-zag SPA configurations, enabling multiple trajectory paths without the need for repeated actuator re-fabrication. By varying the SLL configuration, different motion trajectories can be achieved, without altering the primary structure of the actuator. Additionally, we tackle the inverse kinematic problem of determining the appropriate SLL configuration for a desired trajectory, using support vector machines (SVM) to predict the optimal configurations. Our experiment demonstrates the ability to generate over 100 unique trajectories using only Dragon Skin 10 & EcoFlex 30, with the SVM model achieving an average accuracy of 95% in predicting the necessary configurations for specific trajectories.

关键词： Support vector machines Pneumatic actuators Dynamics Kinematics Soft robotics Predictive models Pneumatic systems Skin Trajectory Manipulator dynamics

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Transparent electromagnetic interference shielding materials using MXene

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Carbon Energy 2024年第11期6卷 322-345页

作者： Yanli Deng Yaqing Chen Wei Liu Lili Wu Zhou Wang Dan Xiao Decheng Meng Xingguo Jiang Jiurong Liu Zhihui Zeng Na Wu Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) School of Materials Science and Engineering Shandong UniversitylinanshandongChina Department of Mechanical Engineering The University of Hong KongHong KongSARChina Advanced Biomedical Instrumentation Centre Hong Kong SARChina State Key Laboratory of Crystal Materials Institute of Crystal Materials Shandong UniversityJinanShandongChina Xiaomi Communications Co.Ltd. School of Chemistry and Chemical Engineering Shandong UniversityJinanShandongChina

With the rapid advancement of terahertz technologies,electromagnetic interference(EMI)shielding materials are needed to ensure secure electromagnetic *** efforts have been devoted to achieving highly efficient EMI shielding films by enhancing flexibility,lightweight,mechanical robustness,and high shielding ***,the consideration of the optical properties of these shielding materials is still in its *** incorporating transparency,visual information from protected systems can be preserved for monitoring interior working conditions,and the optical imperceptibility allows nonoffensive and easy cover of shielding materials for both device and *** are many materials that can be applied to transparent EMI *** particular,two-dimensional transition metal carbide/nitrides(MXenes),possessing the advantages of superior conductivity,optical properties,favorable flexibility,and facile processibility,have become a great *** work reviews the recent research on developing highly efficient and optically transparent EMI shields in a comprehensive *** from MXenes,indium tin oxide,metal,carbon,and conductive polymers are covered,with a focus on the employment of MXene-based composites in transparent EMI *** prospects and challenges for the future development of MXene-based transparent EMI shields are *** work aims to promote the development of high-performance,optically transparent EMI shields for broader applications by leveraging MXenes.

关键词： electromagnetic waves transition metal carbides/nitrides transparent electromagnetic shielding materials

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Empirical Evaluation of AI Based Oral Cancer Identification Scheme Using Learning Assisted Medical Image Processing Scheme

Empirical Evaluation of AI Based Oral Cancer Identification ...

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2024 International Conference on Innovative Computing, Intelligent Communication and Smart Electrical Systems, ICSES 2024

作者： Vaijayanthi, S. Charulatha, G. Murugan, J. Senthil Lakshmi, N. Thenmozhi, E. Khan, S. Mahaboob Rajalakshmi Institute of Technology Department of Ai&ds Chennai India Selvam College of Technology Department of Biomedical Engineering Namakkal India Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College Department of Cse Chennai India Chennai India Panimalar Engineering College Department of Information Technology Chennai India Annamacharya University Department of Mechanical Engineering AndhraPradesh Rajampet India

ISBN: (纸本)9798331543617

Early detection is essential for enhancing patient outcomes, as oral cancer continues to be a substantial health challenge. This manuscript introduces the Optimized Neural Learning and Classification Principle (ONLCP), a novel AI-based oral cancer identification scheme that incorporates medical image processing techniques and deep learning. Our method utilizes smart to analyze and classify medical images, thereby enabling the early detection of oral cancer. The efficiency of the proposed scheme is assessed by cross-validating it with the Convolutional Neural Network (CNN). The model is refined by this AI-based logic, which adapts to a variety of image characteristics and improves detection precision, while the ONLCP is employed for feature extraction and initial classification of oral lesions. The experimental results indicate that the AI-based scheme ONLCP obtains a prediction accuracy of 97.86%, with substantial enhancements in sensitivity and specificity when contrasted with conventional methods. The model's continuous development and adaptive learning are enabled by the integration of learning-assisted techniques, resulting in more precise and dependable cancer identification. Our results emphasize the potential of integrating AI with advanced image processing techniques to resolve critical challenges in medical diagnostics. This research has the potential to improve patient care and treatment outcomes by contributing to the growth of more efficient and scalable techniques to early oral cancer identification. © 2024 IEEE.

关键词： Convolutional neural networks

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Main Melody Configuration and Chord Algorithm for Relaxing Music Generation

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Intelligent Automation & Soft Computing 2023年第1期35卷 661-673页

作者： Chih-Fang Huang Ai-Hsien Fan Jin-Huang Huang Hsing-Cheng Huang Department of Health and Marketing Kainan UniversityTaoyuanTaiwanChina Master Program at School of Healthcare Management Kainan UniversityTaoyuanTaiwanChina Ph.D.Program of Mechanical and Aeronautical Engineering Feng Chia UniversityTaichungTaiwanChina

This study applies the diatonic chord in music theory,utilization rate,and the close relationship between the main chord system,the dominant chord system,and the subordinate chord *** the perspective of music theory,the computer can automatically and quickly analyze the music,and establish a set of algorithms for configuring the chord accompaniment for the main melody,called the symmetrical circle offifths algorithm,SCFA(Symmetrical Circle of Fifths Algorithm).SCFA can immediately confirm the key,perform harmony analysis,configure chord accompaniment for the main melody,and effectively and correctly complete any given melody or *** can also quickly analyze and correctly configure the chord accompaniment for any MIDI(Musical Instrument Digital Interface)music,enriching the musicality of the *** can also allow scorers or computer music creators to quickly deconstruct the harmony configuration of the *** the measurement of bio-feedback sensor HRV(Heart Rate Variability),it can achieve a relaxing music healing effect.

关键词： Symmetrical circle of fths algorithm SCFA bio-feedback sensor HRV heart rate variability relaxing music healing effect

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INTER- AND INTRA-LAMINAR PROPERTIES OF AN AFP POST-PROCESSED THERMOPLASTIC COMPOSITE

INTER- AND INTRA-LAMINAR PROPERTIES OF AN AFP POST-PROCESSED...

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SAMPE 2024 Conference and Exhibition

作者： Yap, Timothy S. Heathman, Nathaniel M. Kirchhoff, Joseph G. Tehrani, Mehran Walker Department of Mechanical Engineering The University of Texas at Austin AustinTX United States Department of Structural Engineering University of California La Jolla San DiegoCA United States Program in Materials Science and Engineering University of California La Jolla San DiegoCA United States

ISBN: (纸本)9781934551455

Transitioning to high-performance thermoplastic composites (TPCs) carries great potential due to their enhanced toughness, ease of repairability, and the possibility of bypassing the need for autoclaves that are essential for curing thermosetting composites. Full consolidation of parts may be achieved in-situ using automated fiber placement (AFP) at slow rates;alternatively, with higher rates, consolidation may only occur following vacuum-bag oven processing (vacuum-bag only or VBO) or compression molding (CM) post-processing. This study investigates the CM of AFP carbon fiber LM-PAEK™ composites at a low pressure of 0.2 MPa to simulate VBO post-processing, focusing on their intra- and inter-laminar behavior. Short-beam strength, fracture toughness modes I and II, and transverse tensile and compressive samples were manufactured via AFP using a fast layup rate, followed by low-pressure CM. As compared to previous studies, post-processing resulted in greater interlaminar bonding. This study demonstrates the viability of TPCs for the next generation of aerospace structures with a relatively simple oven post-processing. © 2024 Soc. for the Advancement of Material and Process engineering. All rights reserved.

关键词： Compression molding

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2p autofluorescence imaging endoscope for clinical observation of metabolic changes in cervical tissue 18

2p autofluorescence imaging endoscope for clinical observati...

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Endoscopic Microscopy XVIII 2023

作者： Camli, Berk Andrus, Liam P. Roy, Aditya Mishra, Biswajit Xu, Chris Georgakoudi, Irene Tkaczyk, Tomasz Ben-Yakar, Adela UT Austin Department of Mechanical Engineering AustinTX United States UT Austin Department of Biomedical Engineering AustinTX United States Cornell University School of Applied and Engineering Physics IthacaNY United States Tufts University Department of Biomedical Engineering MedfordMA United States Rice University Department of Bioengineering HoustonTX United States UT Austin Department of Electrical and Computer Engineering AustinTX United States

ISBN: (纸本)9781510658172

Imaging modalities capable of detecting functional changes over small areas can increase sensitivity and specificity of early cancer detection. Label-free imaging of metabolic activity at cellular level resolution over full thickness of cervix epithelium is possible with 2p imaging. However, low probability of 2p excitation and scattering nature of tissues limit autofluorescence levels in 2p imaging. We present a 2p autofluorescence imaging endoscope system for detection of metabolic changes in cervix in a clinical setting, with an increased collection efficiency in scattering media. Collection of autofluorescence signals is done with a multitude of high NA fibers arranged around a miniaturized excitation objective. By cleaving the collection fibers at a specific angle, we increase the directivity of the collection and the collection efficiency per fiber. The endoscope performs imaging at 775 nm, which is capable of exciting NAD(P)H and FAD molecules. Laser pulses of 100 fs duration are delivered to the sample with an air core photonic bandgap fiber. Fiber is scanned in spiral pattern via a piezo actuator tube. Scanning at different tissue depths is possible with the axial actuation of the endoscope via a linear stepper motor. Benchtop tests indicate that the endoscope system has lateral and axial resolutions of 0.65 µm and 4.33 µm, respectively. Fluorescence images of pollen cores are presented to demonstrate the imaging quality of the endoscope system. © 2023 SPIE.

关键词： Efficiency

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Validation of parameter for bioink Hydroxyapatite/Gelatin Scaffold by 3D extrusion bio-printing for orthopedic surgery 15

Validation of parameter for bioink Hydroxyapatite/Gelatin Sc...

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15th biomedical engineering International Conference, BMEiCON 2023

作者： Tappaviboon, Kamolchat Ketbunlu, Ekapon Pimpin, Alongkorn Morakul, Sarita Chancharoen, Ratchatin Chessadangkul, Kriengkrai Tharasanit, Theerawat Chulalongkorn University Undergraduate School of Mechanical Engineering Bangkok Thailand Chulalongkorn University Micro/Nano Electromechanical Integrated Device Research Unit Faculty of Engineering Bangkok Thailand Chulalongkorn University Composite Structure Research Unit Department of Mechanical Engineering Bangkok Thailand Chulalongkorn University Department of Mechanical Engineering Bangkok Thailand Chulalongkorn University Graduated School of Biomedical Engineering Faculty of Engineering Bangkok Thailand Chulalongkorn University Faculty of Veterinary Science Department of Obstetrics Gynaecology and Reproduction Bangkok Thailand

ISBN: (纸本)9798350345247

It is well known that large bone defects present significant challenge in orthopedic surgery, especially critical-sized defects, which can cause a trauma to the patient. The current treatment for this problem is underwhelming and often agitated with complications. Additive manufacturing of 3D bioprinting offers a solution by allowing the replacement of osteogenic cells and artificial components of bone, where additive biomaterials and bioactive signaling can mimic native tissue. This study aims to verify the parameter that affect the fabrication process of 3D bioprinting by extrusion with composite Hydroxyapatite with gelatin and gelatin methacryloyl (GelMa) scaffold. Furthermore, it will evaluate the biocompatibility with osteoblast cells and fibroblast cells for bone tissue engineering. Preliminary result was conducted by preparing the gelatin with Hydroxyapatite. The concentration of Hydroxyapatite and gelatin bioink was prepared. The effect of printing parameter on pore ratio and printability and pore ration were calculated to discuss the validation of parameter. Biocompatibility is being tested by MTT assay and cell viability to evaluate the cytotoxicity by counting kit. [Results] Increasing of velocity of printing increased stable forming of scaffold while the temperature kept remaining. The results showed the pore printability that affected by velocity and pressure in each temperature. Cytotoxicity results demonstrated that hydroxyapatite/gelatin reconstituted bioink is friendly environment to cell similar to controlled group. Printing with a lower temperature bioink, increasing the pore ratio required a higher increase in pressure of tips compared to an increase in speed of tips. Pore printability, there is a positive correlation with speed, while there is a negative correlation with pressure. This printability can be used as a reference for mechanical properties evaluation. 1% Hydroxyapatite/ 20% Gelatin hydrogel has a good biocompatibility (cell viability/

关键词： 3D printing

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Ultrasonic-assisted synthesis of CaCu3Ti4O12/reduced graphene oxide composites for enhanced photocatalytic degradation of pharmaceutical products: Ibuprofen and Ciprofloxacin

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Environmental Science and Pollution Research 2024年第19期31卷 27770-27788页

作者： Ahmadipour, Mohsen Ardani, Mohammad Rezaei Sarafbidabad, Mohsen Missaoui, Nadhem Satgunam, Meenaloshini Singh, Ramesh Kahri, Hamza Pal, Ujjwal Pang, Ai Ling Iqbal, Muhammad Saqlain Garg, Renuka Bhattacharya, Anish Institute of Power Engineering Universiti Tenaga Nasional Serdang Malaysia School of Materials and Mineral Resources Engineering Universiti Sains Malaysia Engineering Campus Pulau Pinang Nibong Tebal14300 Malaysia Biomedical Engineering Department Faculty of Engineering University of Isfahan Isfahan Iran Faculty of Science of Monastir University of Monastir Avenue of Environment Monastir5000 Tunisia Department of Mechanical Engineering Universiti Tenaga Nasional Serdang Malaysia Faculty of Engineering University of Malaya Kuala Lumpur50603 Malaysia Department of Energy & amp Environmental Engineering CSIR Indian Institute of Chemical Technology Tarnaka Telangana Hyderabad500007 India Ghaziabad201002 India Department of Chemical Science Faculty of Science Universiti Tunku Abdul Rahman Perak Kampar31900 Malaysia Department of Chemistry COMSATS University Islamabad Lahore campus Lahore54000 Pakistan Department of Chemical and Biological Engineering American University of Sharjah Sharjah United Arab Emirates Department of Physics Faculty of Science Universiti Teknologi Malaysia UTM Johor Skudai81310 Malaysia

The objective of this research is to create a highly effective approach for eliminating pollutants from the environment through the process of photocatalytic degradation. The study centers around the production of composites consisting of CaCu3Ti4O12 (CCTO) and reduced graphene oxide (rGO) using an ultrasonic-assisted method, with a focus on their capacity to degrade ibuprofen (IBF) and ciprofloxacin (CIP) via photodegradation. The impact of rGO on the structure, morphology, and optical properties of CCTO was inspected using XRD, FTIR, Raman, FESEM, XPS, BET, and UV–Vis. Morphology characterization showed that rGO particles were dispersed within the CCTO matrix without any specific chemical interaction between CCTO and C in the rGO. The BET analysis revealed that with increasing the amount of rGO in the composite, the specific surface area significantly increased compared to the CCTO standalone. Besides, increasing rGO resulted in a reduction in the optical bandgap energy to around 2.09 eV, makes it highly promising photocatalyst for environmental applications. The photodegradation of IBF and CIP was monitored using visible light irradiation. The results revealed that both components were degraded above 97% after 60 min. The photocatalyst showed an excellent reusability performance with a slight decrease after five runs to 93% photodegradation efficiency. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Reusability

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Advancements and Challenges of Micromechanics-based Homogenization for the Short Fiber Reinforced Composites

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Multiscale Science and engineering 2024年第3期5卷 133-146页

作者： Lee, Hugon Lee, Sangryun Ryu, Seunghwa Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Daejeon Republic of Korea Division of Mechanical and Biomedical Engineering Ewha Womans University Seoul Republic of Korea

In the realm of technologically important short fiber and particulate-reinforced composites, homogenization approaches based on micromechanics are extensively explored for estimating inherent effective properties. This review provides a comprehensive overview of the core principles underpinning micromechanics-based homogenization, as well as its advancements and applications encompassing: (i) predicting nonlinear reactions under complex and cyclic loading conditions, (ii) accounting for interfacial imperfections, and (iii) estimating various effective physical properties. We also delve into the integration of (iv) data-driven strategies, aiming to augment the accuracy of predictions. We conclude the article by discussing a seminal challenge, (v) the prediction of localized failure.

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