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38th Conference on Neural Information Processing Systems, NeurIPS 2024

作者： Oganesian, Lucine L. Sani, Omid G. Shanechi, Maryam M. Ming Hsieh Department of Electrical and Computer Engineering University of Southern California Los AngelesCA United States Ming Hsieh Department of Electrical and Computer Engineering Thomas Lord Department of Computer Science Alfred E. Mann Department of Biomedical Engineering Neuroscience Graduate Program University of Southern California Los AngelesCA United States

Generalized-linear dynamical models (GLDMs) remain a widely-used framework within neuroscience for modeling time-series data, such as neural spiking activity or categorical decision outcomes. Whereas the standard usage of GLDMs is to model a single data source, certain applications require jointly modeling two generalized-linear time-series sources while also dissociating their shared and private dynamics. Most existing GLDM variants and their associated learning algorithms do not support this capability. Here we address this challenge by developing a multi-step analytical subspace identification algorithm for learning a GLDM that explicitly models shared vs. private dynamics within two generalized-linear time-series. In simulations, we demonstrate our algorithm's ability to dissociate and model the dynamics within two time-series sources while being agnostic to their respective observation distributions. In neural data, we consider two specific applications of our algorithm for modeling discrete population spiking activity with respect to a secondary time-series. In both synthetic and real data, GLDMs learned with our algorithm more accurately decoded one time-series from the other using lower-dimensional latent states, as compared to models identified using existing GLDM learning algorithms. © 2024 Neural information processing systems foundation. All rights reserved.

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Active Tip Trajectory Control in Zig-Zag Soft Actuators using Modular Strain-Limiting Layers with Phase-Changing Inclusions

Active Tip Trajectory Control in Zig-Zag Soft Actuators usin...

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IEEE International Conference on Soft Robotics (RoboSoft)

作者： P. D. S. Hiroshan Gunawardane G. E. Zesiro 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 actuators are increasingly employed as an alternative to rigid actuators for delicate applications that demand high flexibility and adaptability. Typically fabricated from compliant materials, soft actuators exhibit significant flexibility. However, when alternative movements beyond their primary motion are required, these actuators often need to be redesigned or re-fabricated, which limits their versatility. This research introduces an innovative design for variable stiffness soft pneumatic actuators (SPAs) by incorporating a modular strain-limiting layer (SLL) embedded with phase-changing inclusions, enabling active control of the tip trajectory in 3D-printed zig-zag SPAs. The modular SLLs are fabricated using phase-changing inclusions composed of 40% high aspect ratio Field’s Metal particles in EcoFlex. The results demonstrate that employing three modular SLLs on a single side of the SPA allows active switching between eight distinct stiffness configurations, thereby achieving eight unique tip trajectories. This capability significantly enhances the working envelope and range of tip trajectories compared to conventional SPAs, providing greater adaptability and functionality for a broader range of applications.

关键词： Pneumatic actuators Metals Switches Soft robotics Trajectory

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Cloud Computing's IoT based ThingSpeak, NodeMCU for Weather Monitoring 5

Cloud Computing's IoT based ThingSpeak, NodeMCU for Weather ...

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5th International Conference on Electronics and Sustainable Communication Systems, ICESC 2024

作者： Suresh Chinnathampy, M. Jobin, C.J. Jarin, T. Aarthi, V.P.M.B. Raghavendran, N. Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College Department of Electronics and Communication Engineering Chennai600062 India Jyothi Engineering College Department of Mechanical Engineering Kerala Thrissur India Jyothi Engineering College Department of Eee Kerala Thrissur India School of Electronics Electrical and Biomedical Technology Kalasalingam Academy of Research and Education Department of Ece Srivilliputtur Krishnankoil626126 India Department of Artificial Intelligence and Date Science Engineering Chennai601206 India

ISBN: (纸本)9798350379945

In this research work, a cloud-based Internet of Things (IoT) system for weather monitoring in real-time is presented by integrating the ThingSpeak platform, the ESP32 microcontroller, and several sensors, such as rain, soil moisture, and temperature sensors (DHT11). The ESP32 acts as the central hub, integrating sensors and wireless connectivity for data acquisition and transmission. Data collected is securely stored, visualized, and analyzed on ThingSpeak, enabling remote monitoring and decision-making. The system's modular design allows easy expansion and customization, accommodating additional sensors or functionalities. Leveraging cloud computing, this IoT solution offers scalability, accessibility, and data sharing for applications like agriculture and environmental monitoring. With efficient data processing and transmission, even in resource-constrained environments, and collaboration features through thingSpeak, this research contributes to advancing cloud-based IoT systems for weather monitoring. © 2024 IEEE.

关键词： Cloud platforms

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Our Role in Solving Global Challenges: An Opinion

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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 2024年第31期146卷 21193-21195页

作者： Carter, Emily A. Department of Mechanical and Aerospace Engineering Program in Applied and Computational Mathematics and the Andlinger Center for Energy and the Environment Princeton University Princeton New Jersey 08544-5263 United States Princeton Plasma Physics Laboratory Princeton New Jersey 08540-6655 United States

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Application of Chaotic Encryption and Decryption in Wireless Transmission From Sensory Toolholders on Machine Tools

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IEEE Sensors Journal 2023年第11期23卷 11453-11468页

作者： Lin, Chi-Yuan Wu, Shu-Cing Kuo, Ping-Huan Huang, Meng-Jun Hong, Song-Wei Yau, Her-Terng National Chin-Yi University of Technology Department of Electronic Engineering Taichung411030 Taiwan National Chin-Yi University of Technology Prospective Technology of Electrical Engineering and Computer Science Program Taichung411030 Taiwan Chiayi62102 Taiwan National Chung Cheng University Department of Mechanical Engineering Chiayi62102 Taiwan

In recent years, several industries have increased their demand for processing precision, automatic detection, and visualization interfaces. Therefore, to keep pace with the fourth industrial revolution, machine tool operators install a large number of sensors on machine tools to obtain more precise physical quantities during processing and use a variety of sensors to obtain measurements in various situations. However, these additional sensors on machine tools result in complicated wire layouts, which exhibit negative effects on processing. Such problems lead to the birth of wireless data transmission, which is expected to become the new standard in the future. At present, there is more and more interactive integration between relevant embedded system and the machine tool, which allows information communication between each other in the wireless domain. However, generally, the majority of machine tool operators focus on optimizing the sensing conditions during processing, but they disregard the importance of information security. In the current era of the Internet of Things (IoT), information security is regarded as a crucial factor. For the wireless communication between the IoT equipment for each machine in the machining field, the transmitted data are almost exposed within public space directly due to the loss in constraint and protection of physical wiring. Therefore, such a process can easily be intercepted by other devices that capture information on relevant status of the machine or command messages received by the controller, where intentional individual may possibly control the operating mechanism and progress of entire plant. This leads to theft of relevant secrets in manufacturing technology for the subject company, or intentional shutdown, machine damage, and vicious blackmailing attacks. Therefore, introducing the mechanism of safety protection during wireless signal transmission is an inevitable technology to maintain the company interests and also the

关键词： Synchronization

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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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FEM simulation optimization and slab method on rotating extrusion of thin-walled round tube under constant shear friction 8

FEM simulation optimization and slab method on rotating extr...

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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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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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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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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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