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arXiv 2023年

作者： Du, Hongyang Zhang, Ruichen Niyato, Dusit Kang, Jiawen Xiong, Zehui Kim, Dong In Shen, Xuemin Poor, H. Vincent The School of Computer Science and Engineering The Energy Research Institute @ NTU Interdisciplinary Graduate Program Nanyang Technological University Singapore The School of Computer Science and Engineering Nanyang Technological University Singapore The School of Computer and Information Technology Beijing Jiaotong University Beijing100044 China The School of Automation Guangdong University of Technology China The Pillar of Information Systems Technology and Design Singapore University of Technology and Design Singapore The Department of Electrical and Computer Engineering Sungkyunkwan University Suwon16419 Korea Republic of The Department of Electrical and Computer Engineering University of Waterloo Canada The Department of Electrical and Computer Engineering Princeton University PrincetonNJ08544 United States

Driven by advances in generative artificial intelligence (AI) techniques and algorithms, the widespread adoption of AI-generated content (AIGC) has emerged, allowing for the generation of diverse and high-quality content. Especially, the diffusion model-based AIGC technique has been widely used to generate content in a variety of modalities. However, the real-world implementation of AIGC models, particularly on resource-constrained devices such as mobile phones, introduces significant challenges related to energy consumption and privacy concerns. To further promote the realization of ubiquitous AIGC services, we propose a novel collaborative distributed diffusion-based AIGC framework. By capitalizing on collaboration among devices in wireless networks, the proposed framework facilitates the efficient execution of AIGC tasks, optimizing edge computation resource utilization. Furthermore, we examine the practical implementation of the denoising steps on mobile phones, the impact of the proposed approach on the wireless network-aided AIGC landscape, and the future opportunities associated with its real-world integration. The contributions of this paper not only offer a promising solution to the existing limitations of AIGC services but also pave the way for future research in device collaboration, resource optimization, and the seamless delivery of AIGC services across various devices. Our code is available at https://***/HongyangDu/DistributedDiffusion. © 2023, CC BY.

关键词： Wireless networks

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Comparison of State-of-Charge and State-of-Health Balancing Schemes Through a Smart Battery Model with Online Degradation

Comparison of State-of-Charge and State-of-Health Balancing ...

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IEEE Annual Southern Power electronics Conference (SPEC)

作者： Jonathan Silva de Oliveira Erick Matheus da Silveira Brito Heverton Augusto Pereira Allan Fagner Cupertino Graduate Program in Electrical Engineering Centro Federal de Educação Tecnológica de Minas Gerais Belo Horizonte Brazil Institute of Exact and Technological Sciences Universidade Federal de Viçosa Florestal Brazil Department of Electrical Engineering Universidade Federal de Viçosa Viçosa Brazil Department of Electrical Energy Universidade Federal de Juiz de Fora Juiz de Fora Brazil

This work evaluates the state-of-charge (SOC) and state-of-health (SOH) balancing techniques for energy storage systems with distributed power electronics architecture, i.e., batteries with integrated power converters. Two approaches are compared: a SOC balancing technique described in the literature and a cascaded SOH/SOC balancing technique proposed in this paper. In the proposed technique, the SOH balancing computes a SOC deviation, leading to different degradation rates in each battery of the pack. The techniques are compared through long-term simulations using: average models for the power converters, a battery-equivalent electric circuit, and an online degradation model. Comparative graphs of capacity and SOH are presented to compare the techniques. Based on simulation results, it was noticed that SOC balancing has fast dynamics equalization, but it leaves the SOH unbalanced if different capacity initial conditions are considered. On the other hand, the SOH balancing is responsible for imposing imbalance on SOC until the SOH reaches the balance. The results reveal that the proposed technique can balance SOH and leads to higher reliability when compared with the traditional SOC balancing.

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SGIRR: Sparse Graph Index Remapping for ReRAM Crossbar Operation Unit and Power Optimization*

SGIRR: Sparse Graph Index Remapping for ReRAM Crossbar Opera...

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IEEE International Conference on Computer-Aided Design

作者： Cheng-Yuan Wang Yao-Wen Chang Yuan-Hao Chang Data Science Degree Program National Taiwan University and Academia Sinica Taipei Taiwan Graduate Institute of Electronics Engineering National Taiwan University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Institute of Information Science Academia Sinica Taipei Taiwan

Resistive Random Access Memory (ReRAM) Crossbars are a promising process-in-memory technology to reduce enormous data movement overheads of large-scale graph processing between computation and memory units. ReRAM cells can combine with crossbar arrays to effectively accelerate graph processing, and partitioning ReRAM crossbar arrays into Operation Units (OUs) can further improve computation accuracy of ReRAM crossbars. The operation unit utilization was not optimized in previous work, incurring extra cost. This paper proposes a two-stage algorithm with a crossbar OU-aware scheme for sparse graph index remapping for ReRAM (SGIRR) crossbars, mitigating the influence of graph sparsity. In particular, this paper is the first to consider the given operation unit size with the remapping index algorithm, optimizing the operation unit and power dissipation. Experimental results show that our proposed algorithm reduces the utilization of crossbar OUs by 31.4%, improves the total OU block usage by 10.6%, and saves energy consumption by 17.2%, on average.

关键词： Energy consumption Visualization Resistive RAM Clustering algorithms Benchmark testing Power dissipation Indexes

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Case Study: Gain Scheduling Adaptive Control Applied on a Didactic Level System

Case Study: Gain Scheduling Adaptive Control Applied on a Di...

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International Carpathian Control Conference (ICCC)

作者： Vinícius Berno Da Silva Paulo César Barros Rodrigues Murillo Ferreira Dos Santos Paolo Mercorelli Milena Faria Pinto Wolmar Araújo Neto Department of Electroelectronics CEFET-MG Leopoldina Brasil Institute for Production Technology and Systems (IPTS) Leuphana University of Lüneburg Germany Graduate Program in Electrical Engineering CEFET-RJ Rio de Janeiro Brasil Federal University of Espírito Santo UFES Vitória Brazil

ISBN: (数字)9798350350708

ISBN: (纸本)9798350350715

Gain scheduling has been successfully applied in many different areas due to the positive results achieved when applied to nonlinear control. Its utilization enables the controller to respond rapidly to changes in operating conditions. This study demonstrates the application of gain scheduling to a SMAR didactic level system to implement adaptive control. The results exhibited a strong response with minor errors using a Proportional and Integral (PI) controller, which facilitated the development of two generic equations for determining the values of K p (proportional gain) and K i (integral gain) based on the desired set point.

关键词： Adaptive scheduling PI control Liquids System dynamics Integral equations Noise Gain measurement

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Tunable Source of Quantum-Correlated Photons with Integrated Pump Rejection in a Silicon CMOS Platform

Tunable Source of Quantum-Correlated Photons with Integrated...

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Frontiers in Optics + Laser Science 2021, FiO+LS 2021 - Part of Frontiers in Optics, FiO 2021

作者： Fargas Cabanillas, Josep M. Kramnik, Danielius Ramesh, Anirudh Gentry, Cale M. Stojanović, Vladimir Kumar, Prem Popović, Miloš A. Department of Electrical and Computer Engineering Photonics Center Boston University BostonMA02215 United States Department of Electrical Engineering and Computer Science UC Berkeley BerkeleyCA94720 United States Graduate Program in Applied Physics Northwestern University EvanstonIL60208 United States Department of Electrical Computer and Energy Engineering University of Colorado BoulderCO80309 United States Center for Photonic Communication and Computing Dept. of Electrical and Computer Eng. Northwestern University EvanstonIL60208 United States

ISBN: (纸本)9781557528209

A wavelength-tunable, silicon photon-pair source based on spontaneous four-wave mixing, integrated with a pump rejection filter in a single, flip-chip packaged CMOS chip, is demonstrated with a coincidence-to-accidentals ratio of 9.1 with no off-chip pump filtering. Frontiers in Optics / Laser Science © Optica Publishing Group 2021.

关键词： CMOS integrated circuits

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Highly Efficient White LEDs by Using Near Unity Emitting Colloidal Quantum Dots in Liquid Medium

Highly Efficient White LEDs by Using Near Unity Emitting Col...

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Novel Optical Materials and Applications, NOMA 2022

作者： Onal, Asim Eren, Guncem Ozgun Sadeghi, Sadra Melikov, Rustamzhon Han, Mertcan Karatum, Onuralp Ozer, Melek Sermin Jalali, Houman Bahmani Dogru-Yuksel, Itir Bakis Yilgor, Iskender Metin, Önder Nizamoglu, Sedat Graduate School of Material Science and Engineering Koç University Istanbul34450 Turkey Graduate School of Biomedical Science and Engineering Koç University Istanbul34450 Turkey Department of Electrical and Electronics Engineering Koç University Istanbul34450 Turkey Istituto Italiano di Tecnologia Plasmon Nanotechnologies Genova16163 Italy Department of Chemistry Koç University Istanbul34450 Turkey Istituto Italiano di Tecnologia Photonic Nanomaterials Genova16163 Italy Koç University Istanbul34450 Turkey Koç University Istanbul34450 Turkey Koc University Boron and Advanced Materials Application and Research Center Koç University Istanbul34450 Turkey

We developed quantum dot (QD) based color-conversion white LEDs that reach over 150 lumens per electrical Watt. For that we synthesized alloyed ZnCdSe/ZnSe QDs with 94% of quantum efficiency and injected QD-liquids on... 详细信息

ISBN: (纸本)9781557528209

关键词： Semiconductor quantum dots

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Reduction of interface defects in gate-recessed GaN HEMTs by neutral beam etching

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Materials Today Advances 2024年 23卷

作者： Yu, Chia Hao Chiang, Wei Hsiang Chen, Yi-Ho Samukawa, Seiji Wuu, Dong Sing Chung, Chin-Han Hsiao, Ching-Lien Horng, Ray Hua Institute of Electronics National Yang Ming Chiao Tung University Department of Materials Science and Engineering National Chung Hsing University Graduate Degree Program of College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Institute of Comunications Engineering National Yang Ming Chiao Tung University Department of Applied Materials and Optoelectronic Engineering National Chi Nan University International College of Semiconductor Technology National Yang Ming Chiao Tung University Thin Film Physics Division Department of Physics Chemistry and Biology (IFM) Linköping University

This study investigates and compares the impact of different etching techniques on the fabrication of GaN high electron mobility transistors (HEMTs) between the inductively coupled plasma reactive ion etching (ICP-RIE) and the neutral beam etching (NBE) for the gate recess. By conducting direct current analysis, it was found that devices manufactured using the NBE exhibited superior electrical performance as compared with those produced using the ICP-RIE. These enhanced electrical characteristics include a transconductance of up to 100.4 mS/mm, a threshold voltage (V_th) of −2.3 V, an on/off current ratio of 1.1 × 10⁹, a subthreshold swing (S.S.) of 99.63 mV/dec, and a remarkably low gate leakage current. Additionally, we noted varying degrees of hysteresis in the I–V characteristics were related to process disparities possibly leading to interface defects. Multi-frequency capacitance-voltage (C–V) measurements were used to identify the interface defects at the oxide/AlGaN interface of the gate. The results revealed that devices fabricated using the NBE exhibited a lower interface defect density as compared with those fabricated using the ICP-RIE, thereby elucidating the reduced hysteresis observed in the I–V characteristics. These findings indicated the significant advantages of the NBE process in the fabrication of GaN HEMTs. © 2024 The Authors

关键词： GaN HEMTs Gate recess Interface defects Multi-frequency C–V Neutral beam etching

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Variable Stiffness Hip Joint for Lower-Limb Exoskeletons

Variable Stiffness Hip Joint for Lower-Limb Exoskeletons

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IEEE/RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob)

作者： Sophia Otálora Hector A. Moreno Marcela Múnera Carlos A. Cifuentes Graduate Program of Electrical Engineering Federal University of Espirito Santo Vitoria Brazil Facultad de Ingeniería Mecánica y Eléctrica Universidad Autónoma de Coahuila Av. Barranquilla s/n Col. Guadalupe Monclova Coah. Mexico Bristol Robotics Laboratory University of the West of England Bristol UK Department of Biomedical Engineering Colombian School of Engineering Julio Garavito Bogota Colombia

ISBN: (数字)9798350386523

ISBN: (纸本)9798350386530

The use of robotics in rehabilitation is a growing area of research, with the potential to greatly improve the quality of life for individuals with impairments. Robotic exoskeletons, in particular, have shown promise for enhancing mobility and independence in patients with conditions such as stroke. Current exoskeleton designs, however, often lack the necessary degrees of freedom (DOFs) to provide adequate balance and support during activities of daily living (ADLs), such as walking and standing. This study proposes a new lower limb exoskeleton design incorporating a variable stiffness hip joint based on a four-bar mechanism. This joint provides additional DOFs for improved balance and stability during gait, making it easier for patients to perform ADLs. The results show that the exoskeleton effectively improves stability during gait testing. This suggests that the proposed design can greatly enhance mobility and independence in impaired patients and could be a valuable tool in rehabilitation robotics.

关键词： Legged locomotion Exoskeletons Biomechatronics Stroke (medical condition) Assistive robots Robots Hip Testing

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Deep Unsupervised Learning for Biomedical Image Translation from Harmonic Generation Microscopy Image to H&E-stained Image

Deep Unsupervised Learning for Biomedical Image Translation ...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Chen, Wei-Ju Liao, En-Yu Tai, Tsung-Ming Liao, Yi-Hua Sun, Chi-Kuang Lee, Cheng-Kuang See, Simon Chen, Hung-Wen International Intercollegiate Ph.D. Program National Tsing Hua University Hsinchu Taiwan Department of Electrical Engineering Graduate Institute of Photonics and Optoelectronics National Taiwan University Taipei Taiwan NVIDIA AI Technology Center NVIDIA Taipei Taiwan Department of Dermatology National Taiwan University Hospital College of Medicine National Taiwan University Taipei Taiwan Institute of Photonics Technologies National Tsing Hua University Hsinchu Taiwan

This work proposes an unsupervised deep learning-based image translation from Harmonic generation microscopy (HGM) to widely used H&E-stained images. The proposed methodology is promising and hopefully will facili... 详细信息

ISBN: (纸本)9781957171258

关键词： Deep learning

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Correlation between directions of postural sway induced by gaze change and auditory stimulation ─ Is different sensory information processed by a common mechanism?

Transactions of Japanese Society for Medical and Biological ...

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Transactions of Japanese Society for Medical and Biological engineering 2019年第1期57卷 21-26页

作者： Hata, Kazunari Fukuoka, Yutaka Department of Electrical Engineering and Electronics Graduate School of Engineering Kogakuin University Japan Department of Electrical and Electronic Engineering Faculty of Engineering Kogakuin University Japan

The direction of postural sway in response to neck dorsal muscle stimulation can be influenced by change in gaze direction. Likewise, this postural sway is affected by change in direction of auditory stimulation. The degree of influence differs from one subject to another, and the reason for this individual difference remains largely unknown. This study analyzed whether the direction of postural sway induced by gaze change and that induced by auditory stimulation are related to each other, with the aim to obtain insight into the brain region involved in these phenomena. Twenty-three subjects participated in the followingtwo sets of measurements. First, we measured the directions of postural sway when the subjects changed their gaze after they turned their head to either the left or right. Next, we measured the directions of postural sway during auditory stimulation from the left or right. Then we calculated the correlation coefficient between the directions of sway measured in these experiments. The correlation coefficients were significant on the right side. These results imply that a common mechanism, in which the two types of sensory information are integrated, is involved in these phenomena. © 2019, Japan Soc. of Med. electronics and Biol. engineering. All rights reserved.

关键词： Muscle

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