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Inkjet-printing assisted engineering of patternable zinc anode-based electrochromic devices

Materials Reports(Energy) 2024年第4期4卷 40-47,I0001页

作者： Sheng Qiu Yanan Zhao Kai Wang Jinbin Luo Rui Wang Xinwei Jiang Jingwei Chen Abdulhakem Y.Elezzabi Wu Zhang Hao Jia Haizeng Li Key Laboratory of Eco-Textiles Ministry of EducationJiangnan UniversityWuxiJiangsu214122China School of Materials Science and Engineering Ocean University of ChinaQingdaoShandong266100China Ultrafast Optics and Nanophotonics Laboratory Department of Electrical and Computer EngineeringUniversity of AlbertaAlbertaT6G 2V4Canada National Innovation Center of Advanced Dyeing&Finishing Technology Tai'anShandong 271000China School of Energy and Power Engineering Shandong UniversityJinanShandong 250061China

Zn anode-based electrochromic devices(ZECDs)stand out as a highly promising technology in the upcoming era of multifunctional electronic devices,offering a blend of electrochromic capabilities and energy storage functions within a single transparent ***,significant challenges persist in achieving efficient patterning,ensuring long-term stability,and fast color-switching kinetics for these *** this study,heterogeneous tungsten oxide nanowires(W_(17)O_(47)/Na_(0.1)WO_(3),WNOs)are formulated into inkjet printing ink to assemble patternable *** heterogeneous electrode structure of WNO enables a highly capacitive-controlled mechanism that promotes fast electrochromic/electrochemical ***,by utilizing a three-dimensional MXene mesh modified substrate,the inkjet-printed ZECDs exhibit a wide optical modulation range of 69.13%,rapid color-changing kinetics(t_(c)=4.1 s,t_(b)=5.4 s),and highly reversible capacities of 70 mAh cm^(-2)over 1000 *** scalable strategy develops the patterned electrodes with a wide optical modulation range and substantial energy storage properties,offering promising prospects for their application in next-generation smart electronics.

关键词： Zn anode-based electrochromic devices Tungsten oxide nanowires Patterned electrodes Inkjet printing Electrolyte optimization

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Structural and optical analyses for InGaN-based red micro-LED

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Discover Nano 2023年第1期18卷 1-13页

作者： Hsiao, Fu-He Miao, Wen-Chien Hong, Yu-Heng Chiang, Hsin Ho, I-Hung Liang, Kai-Bo Iida, Daisuke Lin, Chun-Liang Ahn, Hyeyoung Ohkawa, Kazuhiro Chang, Chiao-Yun Kuo, Hao-Chung Semiconductor Research Center Hon Hai Research Institute Taipei11492 Taiwan Department of Electrophysics College of Science National Yang Ming Chiao Tung University Hsinchu30010 Taiwan Department of Photonics and Institute of Electro-Optical Engineering College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu30010 Taiwan Thuwal23955 6900 Saudi Arabia Department of Electrical Engineering National Taiwan Ocean University Keelung202301 Taiwan

This study presents a comprehensive analysis of the structural and optical properties of an InGaN-based red micro-LED with a high density of V-shaped pits, offering insights for enhancing emission efficiency. The presence of V-shaped pits is considered advantageous in reducing non-radiative recombination. Furthermore, to systematically investigate the properties of localized states, we conducted temperature-dependent photoluminescence (PL). The results of PL measurements indicate that deep localization in the red double quantum wells can limit carrier escape and improve radiation efficiency. Through a detailed analysis of these results, we extensively investigated the direct impact of epitaxial growth on the efficiency of InGaN red micro-LEDs, thereby laying the foundation for improving efficiency in InGaN-based red micro-LEDs. © 2023, The Author(s).

关键词： Photoluminescence

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Monocular depth estimation based on deep learning for intraoperative guidance using surface-enhanced Raman scattering imaging

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Photonics Research 2025年第2期13卷 550-560页

作者： ANIWAT JUHONG BO LI YIFAN LIU CHENG-YOU YAO CHIA-WEI YANG A.K.M.ATIQUE ULLAH KUNLI LIU RYAN P.LEWANDOWSKI JACK R.HARKEMA DALEN W.AGNEW YU LEO LEI GARY D.LUKER XUEFEI HUANG WIBOOL PIYAWATTANAMETHA ZHEN QIU Department of Electrical and Computer Engineering Michigan State University Institute for Quantitative Health Science and Engineering Michigan State University Department of Biomedical Engineering Michigan State University Department of Chemistry Michigan State University Department of Pathobiology and Diagnostic Investigation College of Veterinary MedicineMichigan State University Department of Periodontics and Oral Medicine University of Michigan Departments of Radiology and Biomedical Engineering University of Michigan Department of Biomedical Engineering School of EngineeringKing Mongkut's Institute of Technology Ladkrabang(KMITL)

Imaging of surface-enhanced Raman scattering(SERS) nanoparticles(NPs) has been intensively studied for cancer detection due to its high sensitivity, unconstrained low signal-to-noise ratios, and multiplexing detection capability. Furthermore, conjugating SERS NPs with various biomarkers is straightforward, resulting in numerous successful studies on cancer detection and diagnosis. However, Raman spectroscopy only provides spectral data from an imaging area without co-registered anatomic context.

关键词： Clinical applications Deep learning Imaging systems Imaging techniques Optical imaging Raman scattering

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An information-theoretic lower bound in time-uniform estimation

arXiv

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arXiv 2024年

作者： Duchi, John C. Haque, Saminul Departments of Statistics and Electrical Engineering Stanford University United States Department of Computer Science Stanford University United States

We present an information-theoretic lower bound for the problem of parameter estimation with time-uniform coverage guarantees. Via a new a reduction to sequential testing, we obtain stronger lower bounds that capture the hardness of the time-uniform setting. In the case of location model estimation, logistic regression, and exponential family models, our Ω(Formula Presented) lower bound is sharp to within constant factors in typical settings. © 2024, CC BY.

关键词： Information theory

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Algorithm and VLSI Architecture of a Near-Optimum Symbol Detector for QSM MIMO Systems

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IEEE Access 2023年 11卷 144113-144125页

作者： Yen, Mao-Hsu Lu, Hoang-Yang Lu, Ken-Hua Lin, Shao-Yueh Chan, Chia-Chen National Taiwan Ocean University Department of Computer Science and Information Engineering Keelung202 Taiwan National Taiwan Ocean University Department of Electrical Engineering Keelung202 Taiwan

Driven by the rapidly growing demand for high quality of service (QoS) in wireless communications, quadrature spatial modulation (QSM) multiple-input multiple-output (MIMO) technologies have received intensive research attention. In this paper, a multiplier-free and divider-free detection algorithm and a corresponding hardware architecture are presented. The proposed algorithm has four steps: 1) applying COordinate Rotation DIgital computer (CORDIC)-based Givens rotations to QR decompose the fading channel matrices, 2) mapping the transmitted M-ary quadrature amplitude modulation (M-QAM) symbols to the binary phase shift keying (BPSK)-modulated bits, 3) symbol slicing to estimate the transmitted symbols for all transmit antenna combinations (TACs), and 4) measuring the likelihood distances and finding the final solution. Based on hardware considerations for high-speed processing, no multipliers or dividers are used in the four corresponding hardware modules. Finally, computer simulations and hardware implementation are conducted for a configuration with four transmit antennas, two active transmit antennas, and four receive antennas. According to the simulation results, the proposed algorithm performs almost as well as the optimal method but has a lower computational complexity. Furthermore, according to the hardware implementation results, the proposed architecture needs 547k gates (kGEs), has a preprocessing latency of 64 clock cycles, provides a throughput rate of 1 Gbps and has a hardware efficiency of 1.83 (Mbps/kGEs) when operating at a frequency of 500 MHz. The above results also show that even for fast fading channels, the proposed detector is still a promising candidate for providing a high throughput rate and an acceptable bit error rate (BER). © 2013 IEEE.

关键词： Fading channels

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Invertibility of Discrete-Time Linear Systems with Sparse Inputs

Invertibility of Discrete-Time Linear Systems with Sparse In...

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IEEE Conference on Decision and Control

作者： Kyle Poe Enrique Mallada René Vidal Applied Mathematics and Computational Science Group University of Pennsylvania PA Mallada is with the Department of Electrical and Computer Engineering Johns Hopkins University MD Departments of Electrical and Systems Engineering Radiology Computer and Information Science Statistics and Data Science University of Pennsylvania PA

ISBN: (数字)9798350316339

ISBN: (纸本)9798350316346

One of the fundamental problems of interest for discrete-time linear systems is whether its input sequence may be recovered given its output sequence, a.k.a. the left inversion problem. Many conditions on the state space geometry, dynamics, and spectral structure of a system have been used to characterize the well-posedness of this problem, without assumptions on the inputs. However, certain structural assumptions, such as input sparsity, have been shown to translate to practical gains in the performance of inversion algorithms, surpassing classical guarantees. Establishing necessary and sufficient conditions for left invertibility of systems with sparse inputs is therefore a crucial step toward understanding the performance limits of system inversion under structured input assumptions. In this work, we provide the first necessary and sufficient characterizations of left invertibility for linear systems with sparse inputs, echoing classic characterizations for standard linear systems. The key insight in deriving these results is in establishing the existence of two novel geometric invariants unique to the sparseinput setting, the weakly unobservable and strongly reachable subspace arrangements. By means of a concrete example, we demonstrate the utility of these characterizations. We conclude by discussing extensions and applications of this framework to several related problems in sparse control.

关键词： Linear systems Geometry Sufficient conditions Systematics Heuristic algorithms Standards

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UAV Swarms for Joint Data Ferrying and Dynamic Cell Coverage via Optimal Transport Descent and Quadratic Assignment

UAV Swarms for Joint Data Ferrying and Dynamic Cell Coverage...

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Conference on Local computer Networks (LCN)

作者： Kai Cui Lars Baumgärtner Mustafa Burak Yilmaz Mengguang Li Christian Fabian Benjamin Becker Lin Xiang Maximilian Bauer Heinz Koeppl Departments of Electrical Engineering and Information Technology Computer Science and Mechanical Engineering Technische Universität Darmstadt Darmstadt Germany

Both data ferrying with disruption-tolerant networking (DTN) and mobile cellular base stations constitute important techniques for UAV-aided communication in situations of crises where standard communication infrastructure is unavailable. For optimal use of a limited number of UAVs, we propose providing both DTN and a cellular base station on each UAV. Here, DTN is used for large amounts of low-priority data, while capacity-constrained cell coverage remains reserved for emergency calls or command and control. We optimize cell coverage via a novel optimal transport-based formulation using alternating minimization, while for data ferrying we periodically deliver data between dynamic clusters by solving quadratic assignment problems. In our evaluation, we consider different scenarios with varying mobility models and a wide range of flight patterns. Overall, we tractably achieve optimal cell coverage under quality-of-service costs with DTN-based data ferrying, enabling large-scale deployment of UAV swarms for crisis communication.

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Spatial Coherence Loss: All Objects Matter in Salient and Camouflaged Object Detection

arXiv

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arXiv 2024年

作者： Yang, Ziyun Choy, Kevin Farsiu, Sina The Biomedical Engineering Department Duke University DurhamNC27705 United States The Biomedical Engineering Electrical and Computer Engineering Ophthalmology and Computer Science Departments Duke University DurhamNC27705 United States

Generic object detection is a category-independent task that relies on accurate modeling of objectness. We show that for accurate semantic analysis, the network needs to learn all object-level predictions that appear at any stage of learning, including the pre-defined ground truth (GT) objects and the ambiguous decoy objects that the network misidentifies as foreground. Yet, most relevant models focused mainly on improving the learning of the GT objects. A few methods that consider decoy objects utilize loss functions that only focus on the single-response, i.e., the loss response of a single ambiguous pixel, and thus do not benefit from the wealth of information that an object-level ambiguity learning design can provide. Inspired by the human visual system, which first discerns the boundaries of ambiguous regions before delving into the semantic meaning, we propose a novel loss function, Spatial Coherence Loss (SCLoss), that incorporates the mutual response between adjacent pixels into the widely-used single-response loss functions. We demonstrate that the proposed SCLoss can gradually learn the ambiguous regions by detecting and emphasizing their boundaries in a self-adaptive manner. Through comprehensive experiments, we demonstrate that replacing popular loss functions with SCLoss can improve the performance of current state-of-the-art (SOTA) salient or camouflaged object detection (SOD or COD) models. We also demonstrate that combining SCLoss with other loss functions can further improve performance and result in SOTA outcomes for different applications. The codes will be released to https://***/TBD upon acceptance. Copyright © 2024, The Authors. All rights reserved.

关键词： Object recognition

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Three-Dimensional Refractive Index Estimation Based on Non-interferometric Optical Diffraction Tomography with Angular and Axial Illumination Scanning

Three-Dimensional Refractive Index Estimation Based on Non-i...

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Digital Holography and Three-Dimensional Imaging, DH 2024

作者： Bazow, Brad Raub, Christopher B. Nehmetallah, George Departments of Electrical Engineering and Computer Science The Catholic University of America 620 Michigan Avenue N.E. WashingtonDC20064 United States The Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Road LaurelMD20723 United States Departments of Biomedical Engineering The Catholic University of America 620 Michigan Avenue N.E. WashingtonDC20064 United States

We present computational inverse scattering to achieve three-dimensional refractive index reconstructions of biological specimens with sub-micron resolution in an optical diffraction tomography system with angular and...

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High Performance and Energy Efficient Floating-Point Multiplier on FPGA

High Performance and Energy Efficient Floating-Point Multipl...

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computer Systems (ICCS), IEEE International Conference on

作者： Hao Zhang Xueyi Zheng Seok-Bum Ko Information Science and Engineering Ocean University of China Qingdao China Electrical and Computer Engineering University of Saskatchewan Saskatoon Canada

In this paper, a high performance and energy efficient double-precision floating-point multiplier is designed and implemented on FPGA devices. A novel mapping solution of the mantissa multiplier is proposed which makes full use of the DSP blocks and requires less pipeline stages. In addition, a dual-mode floating-point multiplier is also proposed in this paper which is designed by splitting the components of the proposed double-precision multiplier. Two parallel single-precision operations are supported. For comparison purpose, the proposed architecture is implemented on Xilinx Virtex-5 (xc5vlx155ff1760-3) device, where the proposed double-precision multiplier can run 3.4% faster than previous work with less latency and can run 32.3% faster than the IP core multiplier with same latency. The proposed dual-mode multiplier can run 20.9% faster than previous fastest dual-mode design. In terms of energy consumption, the proposed double-precision multiplier consumes 43.3% less energy per operation compared to the double-precision IP core. The proposed dual-mode multiplier can achieve 24.5% less energy per operation compared to the double-precision IP core. The implementation results of the proposed architectures on latest Xilinx Virtex-7 and Altera Arria-10 devices are provided.

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