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International Symposium on Soft Computing and Intelligent Systems (SCIS)

作者： Manabu Kojima Kazuma Otsuki Masato Suzuki Masajiro Abe Masaaki Baba Kazuya Yokota Master's Program in Mechanical Engineering Nagaoka University of Technology Nagaoka Japan Department of System Safety Engineering Nagaoka University of Technology Nagaoka Japan Department of Mechanical Engineering Nagaoka University of Technology Nagaoka Japan

ISBN: (数字)9798350373332

ISBN: (纸本)9798350373349

With the development of machine learning, numerical analysis using neural networks has been devised. Remarkably, physics-informed neural networks (PINNs) enable physically consistent numerical analysis by introducing a loss function that conforms to relevant governing equations. Moreover, research is rapidly advancing for the application of PINNs to inverse analysis in areas such as physical property identification. For a PINN to learn governing equations, the weights of the loss functions should be properly determined because they have different roles in components such as boundary conditions, initial conditions, and governing equations. However, weight setting is generally challenging. We propose a loss balancing method considering the procedure for solving partial differential equations. The proposed method is validated through comparisons with conventional solvers.

关键词： Training Heating systems Numerical analysis Partial differential equations Neural networks Manuals Machine learning Object recognition MATLAB Convergence

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Fish Swing Biomimetic Magnetically Controlled Microrobot

Fish Swing Biomimetic Magnetically Controlled Microrobot

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2022 IEEE International Conference on robotics and Biomimetics, ROBIO 2022

作者： Li, Qingwei Niu, Fuzhou Gan, Minfeng Yang, Hao Robotics and Microsystems Center School of Mechanical and Electric Engineering Soochow University Suzhou215000 China School of Mechanical Engineering Suzhou University of Science and Technology Suzhou215000 China The First Hospital of Soochow University The Orthopedic Department Suzhou215000 China

ISBN: (纸本)9781665481090

Inspired by the swing propulsion of fish, this paper presents a rod-shaped microrobot consisting of a magnetic head, a magnetic tail, and a flexible body. The proposed microrobots can move with great stability and precision, producing fish-like swing motions driven by an external oscillating magnetic field. Microrobots can achieve precisely targeted motion along predetermined trajectories, showing the potential for future in vivo targeted therapy. In addition, we also designed a mechanical-electromagnetic hybrid actuation system suitable for rod-shaped microrobot driving. The simple structure and novel design of the system not only provide the required magnetic field for the microrobot but also benefit the microrobot rotation. The newly designed microrobot and the magnetic actuation system provide a new way for the development of magnetic microrobot. © 2022 IEEE.

关键词： Fish

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Career Paths of Doctoral Recipients in engineering and Computer Science: Trends by Sex, Race, Citizenship, and Discipline with an Emphasis on Biomedical engineering

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Biomedical engineering Education 2024年第2期4卷 185-197页

作者： Denton, Maya Knight, David B. Deters, Jessica R. Grote, Dustin M. Borrego, Maura Center for Engineering Education University of Texas at Austin Austin USA Gallogly College of Engineering University of Oklahoma Norman USA Department of Engineering Education Virginia Tech Blacksburg USA Department of Mechanical & Materials Engineering University of Nebraska Lincoln USA Moyes College of Education Weber State University Ogden USA Department of Mechanical Engineering and STEM Education Program Center for Engineering Education University of Texas at Austin Austin USA

We summarize national-scale data for Ph.D. earners in engineering or computer science from 2015 to 2019 whose post-graduate school employment is known, highlighting outcomes for biological/biomedical/biosystems engineering students. We use NSF’s Survey of Earned Doctorates (SED), which has collected information from Ph.D. recipients in the USA since 1957. The data are collected at the time of degree completion and constitute a greater than 90% response rate. Compared to all engineering and computer science disciplines, biological/biomedical/biosystems engineering has a higher proportion going to 4yr/med/research institutions (52% vs. 33%) and non-profit (3.6% vs. 2.9%) and lower proportion going to industry (33% vs. 48%), government (4.3% vs. 8.4%), and is similar for non-US positions (6.1% vs. 5.7%). Compared to 2010–2014 biological/biomedical/biosystems engineering Ph.D. recipients, more 2015–2019 recipients are going to industry (25% to 33%) and fewer to 4yr/med/research institutions (59% to 52%) and governmet (5.3% to 4.3%). Across all engineering and computer science disciplines, a smaller proportion of females entered industry (43%) compared to males (49%), while a larger proportion of females entered 4yr/med/research institutions (37%) compared to males (32%). Over half of Asian doctoral recipients entered industry, as compared to 38% of Hispanic doctoral recipients. In contrast, a higher proportion of Hispanic individuals (37%) entered 4yr/med/research institutions after their doctoral programs, as compared to 31% of Asian doctoral recipients. Black doctoral recipients had the highest proportion enter positions in government (14%) and non-profit (4%) sectors. Our results are situated in the broader literature focused on postdoctoral career, training, and employment sectors and trends in STEM. We discuss implications for graduate programs, policymakers, and researchers.

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Design and Performance Comparison of Low Dropout Regulators for a 32-bit Microcontroller Using 22nm Technology

Design and Performance Comparison of Low Dropout Regulators ...

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IEEE Latin American Symposium on Circuits and Systems (LASCAS)

作者： Emmanuel K. M. Johnson Luis Victor N. Lima Pamela. R. A. N. Campagnucci Sandro A. P. Haddad Wellington A. Amaral Daniel M. Muñoz Department of Mechanical Engineering Mechatronics Graduate Program University of Brasilia Brasilia DF Brazil Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia Brasilia DF Brazil

ISBN: (数字)9798331522124

ISBN: (纸本)9798331522131

This paper presents a comparison between two LDOs (Low Dropout Regulators) developed for a PMIC (Power Management Integrated Circuit) responsible for powering a 32-bit microcontroller based on the RISC-V microarchitecture, designed in 22 nm technology. The microcontroller will be integrated with a radio frequency interface for IoT (Internet of Things) applications. Two LDOs were designed: one with external compensation and the other a capacitor-less LDO. Both operate with an input voltage of 2.5V, an output voltage of 0.8V, and a maximum current of 150mA. The externally compensated LDO exhibited greater stability in response to load variations and a higher PSRR (Power Supply Rejection Ratio), while the capacitor-less LDO demonstrated faster regulation speed and occupied a chip area similar to the externally compensated LDO.

关键词： Regulators Microcontrollers Power supplies Power system management Simulation Stability analysis Regulation Circuit stability Internet of Things Voltage control

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A Single-Parameter Model for Soft Bellows Actuators under Axial Deformation and Loading

A Single-Parameter Model for Soft Bellows Actuators under Ax...

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IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Emma Treadway Melissa Brei Audrey Sedal R. Brent Gillespie Department of Engineering Science Trinity University San Antonio USA department of Mechanical Engineering Massachusets Institute of Technology Cambridge USA Department of Mechanical Engineering McGill University Montreal Quebec Canada Departments of Robotics and Mechanical Engineering University of Michigan Ann Arbor USA

Soft fluidic actuators are becoming popular for their backdrivability, potential for high power density, and their support for power supply through flexible tubes. Control and design of such actuators requires serviceable models that describe how they relate fluid pressure and flow to mechanical force and motion. We present a simple 2-port model of a bellows actuator that accounts for the relationships among fluid and mechanical variables imposed by the kinematics of the deforming bellows structure and accounts for elastic energy stored in the actuator's thermoplastic material structure. Elastic energy storage due to axial deformation is captured by revolving a differential strip whose linear elastic behavior is a nonlinear function of the actuator length. The model is evaluated through experiments in which either actuator length and pressure or force and pressure are imposed. The model has an error of 9.8% of the force range explored and yields insight into the effects of geometry changes. The resulting model can be used for model-based control or actuator design across the full operating range and can be exercised under either imposed force or imposed actuator length.

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How a Global Elective engineering class impacts engineering Students' Global Efficacy

How a Global Elective Engineering class impacts Engineering ...

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2023 IEEE IFEES World engineering Education Forum and Global engineering Deans Council, WEEF-GEDC 2023

作者： Gurganus, Jamie R. Malschutzky, Michael M. Do Carmo Santos, Joao Carlos Zupan, Marc Dos Santos, Abel Dias Engineering & Computing Education Program & Graduate School Baltimore United States Centre for Teaching Development and Innovation Department of Management Sciences Hochschule Bonn-Rhein-Sieg Sankt Augustin Germany College of Engineering and Information Technology Department of Mechanical Engineering Baltimore United States Departamento de Engenharia Mecânica Porto Portugal

ISBN: (纸本)9798350316025

Today's pluralistic and globalized society requires a global perspective in how we think, view ourselves, and relate to others to collaborate successfully with people with different cultural backgrounds. To support the development of a global perspective, universities cultivate international co-operations to enable international mobility for students, faculty, and staff. However, in-person mobility can be inhibited due to various reasons. To support a wider pool of students gaining international experience, modern digital mediated course formats can be used to offer virtual instead of in-person mobility. This contribution evaluates a digital mediated course for mechanical engineering students (Global engineering, GE) held in co-operation between an US and a Portuguese university, where internationally mixed student groups working on design projects in an Hyflex setting. Asides a literature driven discussion about the need for Global Engineers and a detailed description of the GE course, a longitudinal analysis was performed to assess the impact of the GE course on the students' development of a global perspective. The longitudinal analysis showed strong statistical support that the digitally mediated GE course improved the participating students' global perspective, assessed with the Global Perspective Inventory (GPI), tremendously. The observed improvements were in three of the six GPI dimensions comparable to an in-person semester abroad. Limitations of the study and future investigations are discussed. © 2023 IEEE.

关键词： Students

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Morphology-controlled synthesis of multi-metal-based spinel oxide nanocatalysts and their performance for oxygen reduction

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Electron 2024年第3期2卷 13-19页

作者： Can Li Jinfong Pan Xiaobo Chen Lihua Zhang Anna Dennett Prabhu Bharathan Douglas Lee Guangwen Zhou Jiye Fang Department of Chemistry State University of New York at BinghamtonBinghamtonNew YorkUSA Materials Science and Engineering Program State University of New York at BinghamtonBinghamtonNew YorkUSA Center for Functional Nanomaterials Brookhaven National LaboratoryUptonNew YorkUSA Department of Mechanical Engineering State University of New York at BinghamtonBinghamtonNew YorkUSA

We present a one-pot colloidal synthesis method for producing monodisperse multi-metal(Co,Mn,and Fe)spinel nanocrystals(NCs),including nanocubes,nano-octahedra,and concave *** study explores the mechanism of morphology control,showcasing the pivotal roles of metal precursors and capping ligands in determining the exposed crystal planes on the NC *** cubic spinel NCs,terminated with exclusive{100}-facets,demonstrate superior electrocatalytic activity for the oxygen reduction reaction(ORR)in alkaline media compared to their octahedral and concave cubic ***,at 0.85 V,(CoMn)Fe_(2)O_(4) spinel oxide nanocubes achieve a high mass activity of 23.9 A/g and exhibit excellent stability,highlighting the promising ORR performance associated with{100}-facets of multi-metal spinel oxides over other low-index and high-index *** by exploring the correlation between ORR performance and surface atom arrangement(active sites),surface element composition,as well as other factors,this study introduces a prospective approach for shapecontrolled synthesis of advanced spinel oxide *** underscores the significance of catalyst shape control and suggests potential applications as nonprecious metal ORR electrocatalysts.

关键词： alkaline media morphology control multi-metal spinel catalyst nanocrystals oxygen reduction

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Design and Performance Comparison of Low Dropout Regulators for a 32-bit Microcontroller Using 22nm Technology 16

Design and Performance Comparison of Low Dropout Regulators ...

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16th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2025

作者： Johnson, Emmanuel K. M. Lima, Luis Victor N. Campagnucci, Pamela. R. A. N. Haddad, Sandro A. P. Amaral, Wellington A. Munoz, Daniel M. University of Brasilia Mechatronics Graduate Program Department of Mechanical Engineering DF Brasilia Brazil University of Brasilia Faculty of Gama Electronics Engineering Undergraduate Program DF Brasilia Brazil

ISBN: (纸本)9798331522124

关键词： Low power electronics

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SIT-Net: Surgical Image Translation Network Using a Generative Adversarial Method with Visual Feature Disentanglement

SIT-Net: Surgical Image Translation Network Using a Generati...

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2023 IEEE International Conference on Real-Time Computing and robotics, RCAR 2023

作者： Guo, Yuhao Zhou, Tiancheng Chi, Wenzheng Zhou, Feng Qi, Peng Li, Ling Sun, Lining Lu, Bo Soochow University Robotics and Microsystems Center School of Mechanical and Electric Engineering Suzhou215021 China Soochow University First Affiliated Hospital Department of Orthopedics Suzhou215021 China Tongji University Department of Control Science and Engineering Shanghai China Suzhou Ultimage Health Technology Co. Ltd. China

ISBN: (纸本)9798350327182

With flourishing advancements of surgical robots and learning-driven algorithms, surgical automation that enables robots with autonomous functions for certain subtasks by learning experts' skills is attracting tremendous attention. To facilitate its development, introducing a high-quality surgical image translation method from current scenes to desired domains can not only augment the data for model training but also alleviate the problems that may frequently encounter using traditional approaches, like visual blurs or incomplete instrument generations. To this end, we propose a new surgical image generation method called Surgical Image Translation Network (SIT-Net). Considering complex features entangled within surgical images, a novel generator that leverages tool masks to disentangle the foreground and background characteristics is proposed. Besides, to retain the completeness of instruments, a novel loss function that can preserve tools' features is introduced to further supervise the model training process. We extensively evaluated our method in terms of the visual appearance of translated images and adopted an evaluation indicator Fréchet Inception Distance (FID) to verify whether the generated images are close to the target domain or not. Both the qualitative and quantitative outcomes demonstrate that our SIT-Net is superior to the traditional approach regarding surgical image translation and generation in desired scenes. © 2023 IEEE.

关键词： Robotic surgery

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Work in Progress: Motivation and Interest on the Design and Optimization of 3D-Printed ABS and PLA Scaffolds 129

Work in Progress: Motivation and Interest on the Design and ...

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129th ASEE Annual Conference and Exposition: Excellence Through Diversity, ASEE 2022

作者： Shamim, Nabila Nguyen, Anh Reeves, Sheena M. Bhuiyan, Ariful Department of Chemical Engineering Prairie View A & M University TX77446 United States Mechanical Engineering Program University of Houston Clear Lake TX United States

Educators are constantly challenged to give a new pedagogical approach to instill a love of learning. However, providing academic content alone may not provide the problem-solving skills necessary for practically solving complex problems in the real world. Technology-integrated learning environments include developing critical thinking, solving complex problems, collaborating, and engaging deeply in the learning process. 3D printing technology allows students to combine these learning processes to create their dream product. In this report, large-pore acrylonitrile butadiene styrene (ABS) and polylactic acid (PLA) scaffolds are printed using a simplistic 3D printer as a preliminary class project. Due to the different structural properties, the varying responses make scaffold design optimization very challenging. The work in progress report aims to determine students' interest and skills with 3D printing using project-based learning opportunities, which are critical to developing successful student learning methodologies. Students from the CHEG 4310 Polymer Science and engineering, a senior-level special topic course in chemical engineering, will conduct a class project printing models using different polymers to gain hands-on experience in 3D printing. This leading-edge technology will enable our minority engineering students to learn in the same environment as industry counterparts, increasing the value of the student experience and interest. In addition, our students can use this platform to design novel materials with the best properties and facilitate the path for finding solutions to industrial problems. © American Society for engineering Education, 2022.

关键词： 3D printers

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