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arXiv 2025年

作者： Shinozaki, Motoya Johmen, Tomoya Hosaka, Aruto Seo, Takumi Yashima, Shunsuke Shirachi, Akitomi Noro, Kosuke Sato, Shoichi Kumasaka, Takashi Yoshida, Tsuyoshi Otsuka, Tomohiro WPI Advanced Institute for Materials Research Tohoku University 2-1-1 Katahira Aoba-ku Sendai980-8577 Japan Research Institute of Electrical Communication Tohoku University 2-1-1 Katahira Aoba-ku Sendai980-8577 Japan Department of Electronic Engineering Graduate School of Engineering Tohoku University Aoba 6-6-05 Aramaki Aoba-Ku Sendai980-8579 Japan Information Technology R&D Center Mitsubishi Electric Corporation Kamakura247-8501 Japan Center for Science and Innovation in Spintronics Tohoku University 2-1-1 Katahira Aoba-ku Sendai980-8577 Japan Center for Emergent Matter Science RIKEN 2-1 Hirosawa Saitama351-0198 Japan

Quantum computers require both scalability and high performance for practical applications. While semiconductor quantum dots are promising candidates for quantum bits, the complexity of measurement setups poses an important challenge for scaling up these devices. Here, radio-frequency system-on-chip (rFSoC) technology is exepcted for a promising approach that combines scalability with flexibility. In this paper, we demonstrate rF reflectometry in gate-defined bilayer graphene quantum devices using rFSoC-based measurement architecture. By controlling the confinement strength through gate voltages, we achieve both Fabry-Pérot interferometer and quantum dot operations in a single device. Although impedance matching conditions currently limit the measurement sensitivity, we identify pathways for optimization through tunnel barrier engineering and resonator design. These results represent a step toward integrating high-bandwidth measurements with scalable quantum devices. Copyright © 2025, The Authors. All rights reserved.

关键词： Fabry-Perot interferometers

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Photo sensing properties of zirconium doped Sn2S3 thin films grown by cost effective nebulizer spray pyrolysis technique

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Journal of Alloys and Compounds 2025年 1029卷

作者： Arulanantham, A.M.S. Gunavathy, K.V. rangasami, C. Mohanraj, P. Sayed, M.A. Shkir, Mohd. Mani, A. Department of Physics Dhanalakshmi Srinivasan College of Engineering and Technology Chennai603104 India PG & Research Department of Physics Pachaiyappa's College Chennai600030 India Thin Film Research Centre Kongu Engineering College Perundurai638060 India Department of Physics School of Science and Humanities Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology Avadi Chennai600062 India Department of Physics College of Science King Khalid University POST BOX 960 Abha61421 Saudi Arabia Center for Advanced Energy Materials SRM TRP Engineering College Tamil Nadu Tiruchirapalli621 105 India

Polycrystalline pure tin trisulfide (Sn2S3) thin films and Zr doped tin trisulfide thin films (doped with 2, 4, 6, 8, and 10 wt% Zr) were fabricated using a cost-effective Nebulizer Spray Pyrolysis (NSP) method with improved opto electronic characteristics. These films were designed for integration into light-sensing devices due to their uniformity as a result of controlled doping. The orthorhombic crystal structure was observed in all samples and X-ray diffraction analysis revealed that all fabricated films were of polycrystalline nature. The crystallite size was found to increase up to 8 wt% doping of Zr. Field emission scanning electron microscopy images indicate that the surface contains uniform spherical grains with their size varying with Zr doping concentration. The band gap of the material increased with the introduction of more Zr into Sn2S3, but initially the optical band gap values decreased up to 8 %. Photo-sensing tests revealed that the sensing characteristics of Zr doped Sn2S3 thin films enhanced up to 8 % Zr doping after which they began to decline. The r, EQE and d* values were found to be 51.6 × 10−2AW-1, 121 % and 24.8 × 109 Jones respectively, indicating the highest levels of responsiveness, external quantum efficiency and detectivity attained for 8 % Zr doping. The improved photodetection capability may be due to the reduced charge carrier recombination rates and appropriate crystallite size. The sample of Sn2S3 thin film that has 8 wt% of Zr doping shows the maximum photocurrent. The present study suggests that doping Sn2S3 thin films with 8 wt% Zr effectively enhances their properties, making them more suitable for optoelectronic applications. © 2025 Elsevier B.V.

关键词： Spray pyrolysis

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The Cu Based AlGaN/GaN Schottky Barrier diode

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Chinese Physics Letters 2015年第6期32卷 192-194页

作者：李迪贾利芳樊中朝程哲王晓东杨富华何志 Engineering Research Center for Semiconductor Integrated Technology Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 Semiconductor Lighting R&D Center Chinese Academy of Sciences Beijing 100083

The electrical characteristics of Cu and Ni/Al AlGaN/GaN Schottky barrier diodes on Si su bstrates are compared. The onset voltage of Cu Schottky diodes is about 0.4 V less than the Ni/Al contact. For the Cu/Ni Schottky contact, the leakage current is 4.7 × 10^-7 A/mm at -10 V. After annealing, the leakage current is decreased to 3.7 × 10^-7 A/mm for 400℃ or 4.6 × 10^-8 A/mm for 500℃, respectively. The electrical property is affected by the thickness ratio of Cu to Ni. The Cu/Ni for 80/20 nm shows a low onset voltage, while the Cu/Ni for 20/80 nm shows a low leakage current. Both breakdown voltages are above 720 V.

关键词： AlGaN Ni The Cu Based AlGaN/GaN Schottky Barrier diode Cu

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deep learning-assisted 3d model for the detection and classification of knee arthritis

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Image and Vision Computing 2025年 160卷

作者： Preethi, d. Govindaraj, V. dhanasekar, S. Sagayam, K. Martin Ansarullah, Syed Immamul Amin, Farhan de la Torre d'ıez, Isabel Garc'ıa, Carlos Osorio Barrera, Alina Eugenia Pascual Alshammari, Fehaid Salem Department of ECE Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Chennai India Department of ECE Kalignar karunanidhi Institute of Technology Coimbatore India Department of ECE Sri Eshwar College of Engineering Coimbatore India Department of ECE Karunya Institute of Technology and Sciences Coimbatore India Department of Management Studies University of Kashmir North Campus Delina Jammu & Kashmir Baramulla193103 India School of Computer Science and Engineering Yeungnam University Gyeongsan38541 Korea Republic of Department of Signal Theory and Communications University of Valladolid Valladolid23200 Spain Universidad Europea del Atl'antico Isabel Torres 21 Santander39011 Spain Riyadh Saudi Arabia King Salman Center for Disability Research Riyadh11614 Saudi Arabia

Osteoarthritis (OA) affects nearly 240 million people worldwide. It is a common degenerative illness that typically affects the knee joint OA causes pain, and functional disability, especially in older adults is a common disease. One of the most common and challenging medical conditions to deal with in old-aged people is the occurrence of knee osteoarthritis (KOA). Manual diagnosis involves observing X-ray images of the knee area and classifying it into different five grades. This requires the physician's expertise, suitable experience, and a lot of time, and even after that, the diagnosis can be prone to errors. Therefore, researchers in the machine learning (ML) and deep learning (dL) domains have employed the capabilities of deep neural network (dNN) models to identify and classify medical images in an automated, faster, and more accurate manner. Combining multiple imaging modalities or utilizing three-dimensional reconstructions can enhance the accuracy and completeness of 2d Images in diagnostic information. Hence to overcome the drawbacks of 2d imaging, the reconstruction of 3d models using 2d images is the main theme of our research. In this paper, we propose a deep learning-based model for the detection and classification of the early diagnosis of arthritis. It is a four-step procedure starting with data collection followed by data conversion. In this step, our proposed model deforms the target's convex hull to produce a 3d model. Herein, a series of 2d photos is utilized, along with surface rendering methods, to create a 3d model. In the third step, the feature extraction is performed followed by mesh refinement. The chamfer loss is optimized based on the rotational shape of the leg bones, and subsequently, the weight of the loss function can be allocated to the target's geometric properties. We have used a modified Gray Level Co-occurrence Matrix (GLCM) for feature extraction. In the fourth step, the image classification is performed and the suggested opti

关键词： Neuroimaging

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A review of Techniques for Lightweight Monocular depth Estimation 10

A Review of Techniques for Lightweight Monocular Depth Estim...

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10th IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2024

作者： Man, Abdullah Abuajwa, Osama M. S. Hidayati Abdul Aziz, Nor Center of Robotic & Sensing Technology TM R&D Cyberjaya Malaysia Center For Intelligent Network TM R&D Cyberjaya Malaysia Multimedia University Center for Engineering Computational Intelligence Faculty of Engineering & Technology Melaka Malaysia

ISBN: (纸本)9798350364163

recent advancements in lightweight neural networks have enabled the deployment of monocular depth estimation (MdE) models on embedded platforms, including microcontrollers, mobile devices, and edge computing environments. Importantly, it allows the effective implementation of various applications, including visual synchronous localization and mapping (SLAM) in resource-constrained robotic systems. This review examines multiple approaches currently being explored for lightweight monocular depth estimation models, with a focus on techniques such as architecture optimization, network pruning and slimming, hybrid convolutional neural network (CNN)-transformer architectures, knowledge distillation, quantization, and low-precision computation, efficient training strategies, innovative loss functions, edge information utilization, energy-quality scalability, and improvements in up-sampling and decoders. This review highlights that combining architecture optimization, network pruning, and slimming with quantization and low-precision computation provides the optimal approach for reducing model parameters while preserving high accuracy. © 2024 IEEE.

关键词： SLAM robotics

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POLE ASSIGNMENT IN rOTATING-dISK VIBrATION CONTrOL USING COMPLEX MOdAL STATE FEEdBACK

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MECHANICAL SYSTEMS ANd SIGNAL PrOCESSING 1988年第3期2卷 225-241页

作者： BYUN, SW LEE, CW Precision Instrument R&D Center Samsung Aerospace Seoul Korea Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Seoul Korea

Modal state feedback controls of rotating disk vibrations in real and complex fields are formulated and compared. Pole assignment in real modal space necessitates the simultaneous assignment of eigenvalues and eigenvectors to uniquely determine the feedback gain matrix. Pole assignment in complex modal space, however, uniquely determines the feedback gain matrix, because preservation of the isotropic nature in the uncontrolled and controlled modal systems only allows the assignment of the isotropic eigenstructure. The proposed complex modal control scheme reduces the order of the system to be dealt with. It also minimises the required control energy and the transient magnitudes of the state.

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A lightweight design scheme for traction system of medium and low speed maglev train 24

A lightweight design scheme for traction system of medium an...

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24th International Conference of Hong Kong Society for Transportation Studies: Transport and Smart Cities, HKSTS 2019

作者： Chao, ruijie Lin, Guobin Ma, Zhixun National Maglev Transportation Engineering Technology R&D Center Tongji University China

ISBN: (纸本)9789881581488

As a new type of vehicle, medium and low speed maglev train is suitable for urban transportation elevated lines with noise control requirements and middle volume transportation demand. The medium and low speed maglev train has the advantages of high speed (100-160km/h), safety and comfort, low vibration and noise, and small turning radius (r50m) (Zhang Hongmei,2005). Because the levitation ability of maglev train is limited by electromagnetic force, it has strict restrictions on the overall weight of the vehicle. The weight of the traction system accounts for a large proportion of the total weight of the vehicle, so the lightweight design of the traction system has an important impact on improving the passenger carrying capacity. Starting from the two factors of rectifying device and traction inverters, this paper presents a lightweight solution for traction system of medium and low speed maglev train with short stator linear induction motor. © 2010 23th International Conference on Architecture of Computing Systems 2010, ArCS 2010 - Workshop Proceedings. All rights reserved.

关键词： Urban transportation

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Optimizing environmental insulation thickness of buildings with CHP-based district heating system based on amount of energy and energy grade

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Frontiers in Energy 2022年第4期16卷 613-628页

作者： Yumei ZHANG Pengfei JIE Chunhua LIU Jing LI School of Mechanical Engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China Engineering and Technology R&D Center of Clean Air Conditioning in Colleges of Shandong Shandong Huayu University of TechnologyDezhou 253000China China Environmental Resources Technology Co. LtdBeijing 100012China

The increase of insulation thickness(IT)results in the decrease of the heat demand and heat medium temperature.A mathematical model on the optimum environmental insulation thickness(OEIT)for minimizing the annual total environmental impact was established based on the amount of energy and energy grade ***,a case study was conducted based on a residential community with a combined heat and power(CHP)-based district heating system(dHS)in Tianjin,***,the effect of IT on heat demand,heat medium temperature,exhaust heat,extracted heat,coal consumption,carbon dioxide(CO_(2))emissions and sulfur dioxide(SO_(2))emissions as well as the effect of three types of insulation materials(i.e.,expanded polystyrene,rock wool and glass wool)on the OEIT and minimum annual total environmental impact were *** results reveal that the optimization model can be used to determine the *** the OEIT of expanded polystyrene,rock wool and glass wool is used,the annual total environmental impact can be reduced by 84.563%,83.211%,and 86.104%,*** can be found that glass wool is more beneficial to the environment compared with expanded polystyrene and rock wool.

关键词： optimum environmental insulation thickness heat medium temperature energy grade extracted heat exhaust heat

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Highly Efficient random Terpolymers for Photovoltaic Applications with Enhanced Absorption and Molecular Aggregation

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Chinese Journal of Polymer Science 2017年第2期35卷 249-260页

作者： Xiao-peng Xu Guang-jun Zhang Yun-zhe Zhao 刘江 Ying Li 彭强 Key Laboratory of Green Chemistry and Technology of Ministry of Education College of ChemistryState Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610064China Chengdu Green Energy and Green Manufacturing Technology R&D Center Chengdu 610207China

A series of copolymers, based on benzo[1,2-b：4,5-b＇]dithiophene （BdT） as the electron donor and 2,1,3- benzothiadiazole （BT）/diketopyrrolo[3,4-c]pyrrole （dPP） as the electron acceptors, were synthesized for highly efficient polymer solar cells. By changing the BT/dPP ratio in the conjugated backbone, the absorption, energy levels, molecular aggregation and carrier mobility could be finely tuned. With increased dPP content, the absorption range was extended to the longer wavelength region with narrower bandgaps. The highest occupied molecular orbital （HOMO） levels were also raised up and the molecular aggregation was enhanced. The balance of these factors would afford a remarkable device performance enhancement. Polymer P3 with BT：dPP = 0.7：0.3 （molar ratio） exhibited the highest power conversion efficiency （PCE） of 9.01%, with open circuit voltage （Voc） = 0.73 V, short current density （Jsc） = 18.45 ***-2, and fill factor （FF） - 66.9%. The PCE value was improved by 48.7% compared to P1 and by 117.6% compared to P7, respectively, indicating a great potential in photovoltaic application.

关键词： Polymer solar cells Terpolymers Complementary absorption Molecular aggregation

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Stability improvement of human collagenα1(I)chain using insulin as a fusion partner

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Chinese Journal of Chemical engineering 2018年第12期26卷 2607-2614页

作者： Yu Mi Yuan Gao daidi Fan Zhiguang duan rongzhan Fu Lihua Liang Wenjiao Xue Shanshan Wang Shaanxi R&D Center of Biomaterials and Fermentation Engineering School of Chemical Engineering Northwest UniversityXi'an 710069China Shaanxi Institute of Microbiology Xi'an 710043China School of Biological Science and Engineering Shaanxi University of Technology Hanzhong 723001China

To enhance the stability of recombinant human collagen α1(I) chains(rhCOL1 A1) in production and purification stages, a gene fragment fusing COL1 A1 and insulin protein coding domains was synthesized and inserted into the pPIC9 K expression vector. The fusion peptide-expressing Pichia pastoris strain was created by *** optimization of shake flask cultures, the ultimate intracellular expression level of the insulin-collagen α1(I) chain fusion protein(INS-COL1 A1) reached about 300 mg·L^(-1), and no obvious protein degradation was found in the fermentation and purification processes. The His-tagged recombinant fusion protein was detected by western blotting and was effectively purified using Ni^(2+)-chelating chromatography. A prominent improvement in the stability of INS-COL1 A1 was observed compared to rhCOL1 A1 in vitro, and the rhCOL1 A1 released from the fusion protein was studied by LC–MS/MS and in bioassays. The results showed that the purified rhCOL1 A1 was consistent with the native protein in amino acid composition and had a similar biological compatibility. To our knowledge, this is the first study to demonstrate the use of insulin as a fusion protein to improve the stability of easily degradable proteins.

关键词： Fusion expression Human collagen α1(I) chain Insulin Protein stability Pichia pastoris

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