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Quantum Computing and engineering (QCE), IEEE International Conference on

作者： Justin Kalloor Mathias Weiden Ed Younis John Kubiatowicz Bert De Jong Costin Iancu Department of Electrical Engineering and Computer Science University of California Berkeley Computational Research Division Lawrence Berkeley National Laboratory

ISBN: (数字)9798331541378

ISBN: (纸本)9798331541385

The design space of current quantum computers is expansive, with no obvious winning solution, leaving practitioners with a crucial question: “What is the optimal system configuration to run an algorithm?” This paper explores hardware design trade-offs across NISQ systems to better guide algorithm and hardware development. Algorithmic workloads and fidelity models drive the evaluation to appropriately capture architectural features such as gate expressivity, fidelity, and crosstalk. As a result of our analysis, we extend the criteria for gate design and selection from only maximizing average fidelity to a more comprehensive approach that additionally considers expressivity with respect to algorithm structures. A custom synthesis-driven compilation workflow that produces minimal circuit representations for a given system configuration drives our methodology and allows us to analyze any gate set effectively. In this work, we focus on native entangling gates (CNOT, ECR, CZ, ZZ, XX, Sycamore, √iSWAP), proposed gates (B Gate, 4 √CNOT, - 8 √CNOT), as well as parameterized gates (FSim, XY). By providing a method to evaluate the suitability of algorithms for hardware platforms, this work emphasizes the importance of hardware-software codesign for quantum computing.

关键词： Quantum system Quantum computing Computational modeling Logic gates Parallel processing Benchmark testing Hardware Circuit synthesis Topology Integrated circuit modeling

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Selection of Three-phase Inverter Topology and Optimization of the PCB Layout of a T-type Bridge-Leg for Power Dense Motor Drive Application

Selection of Three-phase Inverter Topology and Optimization ...

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Workshop on Smart Grid and Renewable Energy (SGRE)

作者： Reza Asrar Ghaderloo Chanaka Singhabahu Rakesh Resalayyan Alireza Khaligh Department of Electrical and Computer Engineering Maryland Power Electronics Laboratory Institute for Systems Research University of Maryland College Park

The topology selection plays a key role in minimizing the losses and improving the output waveform quality of an inverter. In addition, increasing the switching frequency of an inverter help to reduce the size of EMI filters resulting in power density improvement. Use of wide-bandgap device (like SiC devices) enables high switching frequency operation in power electronic converters. However, due to low gate charge and small junction capacitance of SiC devices, the SiC-based inverter is more likely to be influenced by side-effects of fast switching transition like undesired ringing, larger voltage overshoot and mistriggerig due to miller-effect. Parasitic inductances of multiple power loops and gate loops within the inverter leg play a key role in these undesired effects, however, a proper design of PCB-layout can reduce these effects. In this paper, a comparison is conducted between a T-type and 2-level inverter topologies for motor drive applications. Furthermore, a placement configuration of components along with the PCB layout are proposed for a T-type leg to improve its switching transition behavior by reducing the power and gate loop parasitic inductances. The parasitic inductances of proposed configuration are estimated using FEA simulation, and the estimated values are used to simulate the switching transition behavior of a T-type leg. Finally, a Double Pulse Test (DPT) is executed to demonstrate the accurate switching transition behaviour of a T-type leg which is designed with the proposed PCB layout and component placement.

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A Traceable Capability-based Access Control for IoT

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computers, Materials & Continua 2022年第9期72卷 4967-4982页

作者： Chao Li Fan Li Cheng Huang Lihua Yin Tianjie Luo Bin Wang Cyberspace Institute of Advanced Technology Guangzhou UniversityGuangzhou510700China PCL Research Center of Cyberspace Security Peng Cheng LaboratoryShenzhen518052China Department of Electrical and Computer Engineering University of WaterlooWaterlooN2L 3G1Canada College of Electrical Engineering Zhejiang UniversityHangzhou310058China

Delegation mechanism in Internet of Things(IoT)allows users to share some of their permissions with ***-based delegation solutions require that only the user who has registered in the cloud can be delegated *** is not convenient when a permission is delegated to a large number of temporarily ***,some works like CapBAC delegate permissions locally in an offline ***,this is difficult to revoke and modify the offline delegated *** this work,we propose a traceable capability-based access control approach(TCAC)that can revoke and modify permissions by tracking the trajectories of permissions *** define a time capability tree(TCT)that can automatically extract permissions trajectories,and we also design a new capability token to improve the permission verification,revocation and modification *** experiment results show that TCAC has less token verification and revocation/modification time than those of CapBAC and *** can discover 73.3%unvisited users in the case of delegating and accessing *** provides more information about the permissions delegation relationships,and opens up new possibilities to guarantee the global security in IoT delegation *** the best of our knowledge,TCAC is the first work to capture the unvisited permissions.

关键词： IoT access control permission delegation delegation trajectory capability revocation capability modification

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Finger Width Effects on Performance of GaN HEMTs

Finger Width Effects on Performance of GaN HEMTs

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Microwave and Antenna Symposium (IMAS), International

作者： Soheil Nouri Amirreza G. Avval Ali Darwish Samir M. El-Ghazaly Department of Electrical Engineering and Computer Science University of Arkansas Fayetteville USA Army Research Laboratory Adelphi MD USA

ISBN: (数字)9798350356359

ISBN: (纸本)9798350356366

In this study, we characterize GaN-HEMT devices and present both DC and AC measurement outcomes for the multi-finger configurations. Specifically, we introduce a new device featuring wide electrodes to assess and compare the performance of various multi-finger arrangements. This particular transistor comprises two fingers, each measuring 150 μm in width. We analyze and compare the s-parameters of structures with varying widths, extending our frequency range up to 67 GHz. This newly developed wide-finger configuration is integral to our ongoing efforts in developing optimized modeling approaches and improved transistor designs. The comparative analysis of different finger widths lays the groundwork for future explorations into high-frequency phenomena, including wave propagation effects and their impact on the performance of millimeter-wave transistors.

关键词： Performance evaluation Microwave antennas Millimeter wave transistors Propagation Fingers HEMTs Thermal analysis Scattering parameters Microwave transistors MODFETs

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Stacked Radial Feeds for Dual-Polarized Arrays

Stacked Radial Feeds for Dual-Polarized Arrays

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Antennas and Propagation & USNC/URSI National Radio Science Meeting

作者： Luke J. Kipfer Pradeep Manivannan Rick W. Kindt Marinos N. Vouvakis Department of Electrical and Computer Engineering University of Massachusetts Amherst MA USA Naval Research Laboratory Washington DC USA

ISBN: (数字)9798350369908

ISBN: (纸本)9798350369915

A 7-21GHz dual-polarized array system with stacked dual radial feeds is presented. The concentrically stacked radial feeds interface with the external system through a triaxial to dual coaxial adapter that detangles a triaxial line to a H-pol and V-pol SMPS connectors. A manifold with two isolated stripline layers is used to connect the radially arranged dual feed ports to the 32H and 32V array ports in a square grid. Due to the stacked arrangement, the feed network comfortably fits under the array footprint with minimal manifold trace lengths and routing loss. Through careful full-wave simulations, it is shown that the feed network has better than 1dB loss and VSWR < 2 across the 3:1 bandwidth, resulting in greater than 75% total system efficiency.

关键词： Manifolds Connectors Stripline Conferences Switched mode power supplies Bandwidth Routing

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Wideband Isolated Dual-Polarized Array Feeds

Wideband Isolated Dual-Polarized Array Feeds

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2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2022

作者： Kipfer, Luke J. Kindt, Rick W. Vouvakis, Marinos N. University of Massachusetts Department of Electrical and Computer Engineering AmherstMA01003 United States Naval Research Laboratory WashingtonDC20375 United States

ISBN: (数字)9781665496582

ISBN: (纸本)9781665496582

A 3.5-21 GHz dual-polarized fixed-beam antenna array system with two isolated feed networks of 32 H-polarized and 32 V-polarized Vivaldi elements is presented. The feed network is comprised of an LTCC package that hosts two novel isolated radial combiners connected via a BGA transition to an organic interposer that is in turn attached to the 64-element Vivaldi array. The dual-polarized planar feed is low-profile, 0.26 wavelengths tall at highest frequency, and is mostly confined under the array footprint. Through diligent full-wave simulations, it is found that the feed loss is approximately 1 dB with-15 dB worst case isolation. The full system with the Vivaldi antenna maintains an input VSWR less than 2.5 over the 6:1 bandwidth while having a total efficiency between 75-90%. © 2022 IEEE.

关键词： Microwave antennas

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Brain-inspired artificial intelligence research: A review

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Science China(Technological Sciences) 2024年第8期67卷 2282-2296页

作者： WANG GuoYin BAO HuaNan LIU Qun ZHOU TianGang WU Si HUANG TieJun YU ZhaoFei LU CeWu GONG YiHong ZHANG ZhaoXiang HE Sheng Chongqing Key Laboratory of Computational Intelligence Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Cyberspace Big Data Intelligent Security Chongqing University of Posts and TelecommunicationsChongqing 400065China College of Computer and Information Science Chongqing Normal UniversityChongqing 401331China State Key Laboratory of Brain and Cognitive Science Institute of BiophysicsChinese Academy of SciencesBeijing 100101China School of Psychological and Cognitive Sciences Peking UniversityBeijing 100871China State Key Laboratory of Multimedia Information Processing School of Computer SciencePeking UniversityBeijing 100871China Department of Computer Science School of ElectronicsInformation and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Faculty of Electronic and Information Engineering Xi’an Jiaotong UniversityXi’an 710049China The Center for Research on Intelligent Perception and Computing Institute of AutomationChinese Academy of SciencesBeijing 100190China Institute of Biophysics Chinese Academy of SciencesBeijing 100101China

Artificial intelligence(AI) systems surpass certain human intelligence abilities in a statistical sense as a whole, but are not yet the true realization of these human intelligence abilities and behaviors. There are differences, and even contradictions, between the cognition and behavior of AI systems and humans. With the goal of achieving general AI, this study contains a review of the role of cognitive science in inspiring the development of the three mainstream academic branches of AI based on the three-layer framework proposed by David Marr, and the limitations of the current development of AI are explored and analyzed. The differences and inconsistencies between the cognition mechanisms of the human brain and the computation mechanisms of AI systems are analyzed. They are found to be the cause of the differences and contradictions between the cognition and behavior of AI systems and humans. Additionally, eight important research directions and their scientific issues that need to focus on braininspired AI research are proposed: highly imitated bionic information processing, a large-scale deep learning model that balances structure and function, multi-granularity joint problem solving bidirectionally driven by data and knowledge, AI models that simulate specific brain structures, a collaborative processing mechanism with the physical separation of perceptual processing and interpretive analysis, embodied intelligence that integrates the brain cognitive mechanism and AI computation mechanisms,intelligence simulation from individual intelligence to group intelligence(social intelligence), and AI-assisted brain cognitive intelligence.

关键词： artificial intelligence cognitive science brain science intelligence science large language model

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Instance-Level Panoramic Audio-Visual Saliency Detection and Ranking 24

Instance-Level Panoramic Audio-Visual Saliency Detection and...

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32nd ACM International Conference on Multimedia, MM 2024

作者： Guo, Ruohao Niu, Dantong Qu, Liao Qi, Yanyu Shi, Ji Yue, Wenzhen Xing, Bowei Chen, Taiyan Ying, Xianghua National Key Laboratory of General Artificial Intelligence School of Intelligence Science and Technology Peking University Beijing China Berkeley AI Research University of California Berkeley BerkeleyCA United States Department of Electrical and Computer Engineering Carnegie Mellon University PittsburghPA United States College of Information and Electrical Engineering China Agricultural University Beijing China

ISBN: (纸本)9798400706868

Panoramic audio-visual saliency detection is to segment the most attention-attractive regions in 360° panoramic videos with sound. To meticulously delineate the detected salient regions and effectively model human attention shift, we extend this task to more fine-grained instance scenarios: identifying salient object instances and inferring their saliency ranks. In this paper, we propose the first instance-level framework that can simultaneously be applied to segmentation and ranking of multiple salient objects in panoramic videos. Specifically, it consists of a distortion-aware pixel decoder to overcome panoramic distortions, a sequential audio-visual fusion module to integrate audio-visual information, and a spatio-temporal object decoder to separate individual instances and predict their saliency scores. Moreover, owing to the absence of such annotations, we create the ground-truth saliency ranks for the PAVS10K benchmark. Extensive experiments demonstrate that our model is capable of achieving state-of-the-art performance on the PAVS10K for both saliency detection and ranking tasks. The code is available at https://***/ruohaoguo/pavsodr. © 2024 ACM.

关键词： Contrastive Learning

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Open-Vocabulary Audio-Visual Semantic Segmentation 24

Open-Vocabulary Audio-Visual Semantic Segmentation

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32nd ACM International Conference on Multimedia, MM 2024

作者： Guo, Ruohao Qu, Liao Niu, Dantong Qi, Yanyu Yue, Wenzhen Shi, Ji Xing, Bowei Ying, Xianghua National Key Laboratory of General Artificial Intelligence School of Intelligence Science and Technology Peking University Beijing China Department of Electrical and Computer Engineering Carnegie Mellon University PittsburghPA United States Berkeley Ai Research University of California Berkeley BerkeleyCA United States College of Information and Electrical Engineering China Agricultural University Beijing China

ISBN: (纸本)9798400706868

Audio-visual semantic segmentation (AVSS) aims to segment and classify sounding objects in videos with acoustic cues. However, most approaches operate on the close-set assumption and only identify pre-defined categories from training data, lacking the generalization ability to detect novel categories in practical applications. In this paper, we introduce a new task: open-vocabulary audio-visual semantic segmentation, extending AVSS task to open-world scenarios beyond the annotated label space. This is a more challenging task that requires recognizing all categories, even those that have never been seen nor heard during training. Moreover, we propose the first open-vocabulary AVSS framework, OV-AVSS, which mainly consists of two parts: 1) a universal sound source localization module to perform audio-visual fusion and locate all potential sounding objects and 2) an open-vocabulary classification module to predict categories with the help of the prior knowledge from large-scale pre-trained vision-language models. To properly evaluate the open-vocabulary AVSS, we split zero-shot training and testing subsets based on the AVSBench-semantic benchmark, namely AVSBench-OV. Extensive experiments demonstrate the strong segmentation and zero-shot generalization ability of our model on all categories. On the AVSBench-OV dataset, OV-AVSS achieves 55.43% mIoU on base categories and 29.14% mIoU on novel categories, exceeding the state-of-the-art zero-shot method by 41.88%/20.61% and open-vocabulary method by 10.2%/11.6%. The code is available at https://***/ruohaoguo/ovavss. © 2024 ACM.

关键词： Semantic Segmentation

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Optical polarized orthogonal matrix

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Photonics research 2025年第2期13卷 373-381页

作者： SHUJUN ZHENG JIAREN TAN XIANMIAO XU HONGJIE LIU YI YANG XIAO LIN XIAODI TAN Information Photonics Research Center College of Photonic and Electronic EngineeringFujian Normal UniversityFuzhou 350117China Department of Electrical and Computer Engineering Duke UniversityDurhamNorth Carolina 27708USA College of Photonic and Electronic Engineering Key Laboratory of Opto-Electronic Science and for Medicine of Ministry of EducationFujian Provincial Key Laboratory of Photonics TechnologyFujian Provincial Engineering Technology Research Center of Photoelectric Sensing ApplicationFujian Normal UniversityFuzhou 350117China

Multiplexing technology serves as an effective approach to increase both information storage and transmission ***,when exploring multiplexing methods across various dimensions,the polarization dimension encounters limitations stemming from the finite orthogonal *** that only two mutually orthogonal polarizations are identifiable on the basic Poincarésphere,this poses a hindrance to polarization *** overcome this challenge,we propose a construction method for the optical polarized orthogonal matrix(OPOM),which is not constrained by the number of orthogonal ***,we experimentally validate its application in high-dimensional multiplexing of polarization *** explore polarization holography technology,capable of recording amplitude,phase,and polarization,for the purpose of recording and selective reconstruction of polarization *** research reveals that,despite identical polarization states,multiple images can be independently manipulated within distinct polarization channels through orthogonal polarization combinations,owing to the orthogonal selectivity among information.

关键词： two mutually orthogonal polarizations optical polarized orthogonal matrix construction method multiplexing methods polarization dimension multiplexing orthogonal polarization combinations polarization holography

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