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Non-Hermitian Physics in Mesoscopic Electron Transport Through Coupled Quantum Dots

Chinese Physics Letters 2025年第4期42卷 114-124页

作者： Yiyang Li Jincheng Lu Chen Wang Jian-Hua Jiang School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou215006China Key Laboratory of Intelligent Optoelectronic Devices and Chips of Jiangsu Higher Education Institutions School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhou215009China Advanced Technology Research Institute of Taihu Photon Center School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhou 215009China Department of Physics Zhejiang Normal UniversityJinhua321004China School of Biomedical Engineering Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei230026China Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou215123China School of Physical Sciences University of Science and Technology of ChinaHefei 230026China

We investigate electron mesoscopic transport in a three-terminal setup with coupled quantum dots and a magnetic *** mapping the original transport problem into a non-Hermitian Hamiltonian form,we study the interplay between the coherent couplings between quantum dots,the magnetic flux,and the dissipation due to the tunnel coupling with the reservoirs.

关键词： quantum dots magnetic fluxby electron mesoscopic transport non hermitian physics magnetic fluxand coherent couplings transport problem tunnel coupling

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Anticipating the lifespan: Predicting the durability of an anode-supported solid oxide fuel cell short stack over 50,000 h

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Progress in Natural science:Materials International 2024年第3期34卷 606-613页

作者： Muhammad Zubair Khan Amjad Hussain Seung-Bok Lee Tak-Hyoung Lim Rak-Hyun Song Department of Materials Science & Engineering Pak-Austria Fachhochschule: Institute of Applied Sciences and Technology Hydrogen Energy Research Division Korea Institute of Energy Research Department of Advanced Energy and System Engineering Korea University of Science and Technology (UST)

In the present study, the operational lifetime of a solid oxide fuel(SOFC) short stack is predicted by investigating the performance degradation of both the short stack and its cells throughout 1000 h at 800°C. The short stack and integral cell voltages are continuously measured during the long-term test, with electrochemical impedance spectroscopy(EIS) conducted every 200 h. The short stack voltage decreased rapidly for the initial 200–300 h and afterwards, it decreased at a slow rate due to the increase in the Ohmic and polarization resistances in the same manner. Scanning electron microscopy results show that there is no delamination or cracking among constituent layers of the short-stack cells. The single degradation effects of the Ni coarsening in the anode, cation migration and surface segregation in cathode and oxide scale growth in metallic interconnect mesh are successfully integrated into a comprehensive lifetime prediction model. The experimentally measured voltage degradation data of the short stack fits well with the developed mathematical model and allows the successful prediction of the lifetime up to 50,000 h.

关键词： SOFC Stack Degradation Impedance Lifetime

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Multilingual Self-Supervised Visually Grounded Speech Models 3

Multilingual Self-Supervised Visually Grounded Speech Models

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3rd Annual Meeting of the ELRA-ISCA Special Interest Group on Under-Resourced Languages, SIGUL 2024

作者： Nguyen, Huynh Phuong Thanh Sakti, Sakriani Japan Advanced Institute of Science and Technology Japan Nara Institute of Science and Technology Japan

ISBN: (纸本)9782493814296

Developing a multilingual speech-to-speech translation system poses challenges due to the scarcity of paired speech data in various languages, particularly when dealing with unknown and untranscribed languages. However, the shared semantic representation across multiple languages presents an opportunity to build a translation system based on images. Recently, researchers have explored methods for aligning bilingual speech as a novel approach to discovering speech pairs using semantic images from unknown and untranscribed speech. These aligned speech pairs can then be utilized to train speech-to-speech translation systems. Our research builds upon these approaches by expanding into multiple languages and focusing on achieving multimodal multilingual pairs alignment, with a key component being multilingual visually grounded speech models. The objectives of our research are twofold: (1) to create visually grounded speech datasets for English, Japanese, Indonesian, and Vietnamese, and (2) to develop self-supervised visually grounded speech models for these languages. Our experiments have demonstrated the feasibility of this approach, showcasing the ability to retrieve associations between speeches and images. The results indicate that our multilingual visually grounded speech models yield promising outcomes in representing speeches using semantic images across multiple languages. © 2024 ELRA Language Resource Association.

关键词： Semantics

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Refining rtMRI Landmark-Based Vocal Tract Contour Labels with FCN-Based Smoothing and Point-to-Curve Projection 30

Refining rtMRI Landmark-Based Vocal Tract Contour Labels wit...

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Joint 30th International Conference on Computational Linguistics and 14th International Conference on Language Resources and Evaluation, LREC-COLING 2024

作者： Ridha, Mushaffa Rasyid Sakti, Sakriani Japan Advanced Institute of Science and Technology Japan Nara Institute of Science and Technology Japan

ISBN: (纸本)9782493814104

advanced real-time magnetic resonance imaging (rtMRI) allows researchers to study articulatory movements during speech production with high temporal resolution. Nevertheless, accurately outlining articulator contours in high-frame-rate rtMRI presents challenges, given data scalability and image quality issues, which make manual and automatic labeling difficult. The widely used publicly available USC-TIMIT dataset provides rtMRI data with landmark-based contour labels for part of the data derived from unsupervised region segmentation using spatial frequency domain representation and gradient descent optimization. While this method yields high-quality labels, occasional labeling errors exist. Many contour detection methods were trained and tested based on this ground truth, which is not purely a gold standard label, and the resulting contour data remains largely undisclosed to the public. This paper offers a refinement of landmark-based vocal tract contour labels by employing outlier removal, a fully convolutional network (FCN)-based smoothing, and a landmark point-to-edge curve projection approach. In the absence of an established ground truth label, we evaluate the quality of the new labels through subjective assessments of several contour areas, comparing them to the existing data labels. © 2024 ELRA Language Resource Association: CC BY-NC 4.0.

关键词： Magnetic resonance imaging

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Corrosion mechanism of Zn-Al-Mg-coated steel in simulated polluted marine atmosphere

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Journal of Iron and Steel Research International 2024年第9期31卷 2294-2307页

作者： Pei-dong Ning Li-yuan Xiao Jin Wang Qian-qian Liu Kui Xiao Research Institute JISCO Hongxing Iron and Steel Co.Ltd.Jiayuguan735100GansuChina Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing100083China

The corrosion behaviour of zinc–aluminium–magnesium-coated steel in a simulated polluted marine atmospheric environment was ***,an indoor ageing acceleration test was carefully designed by simulating a polluted marine *** objective was to in-depth investigate the corrosion mechanism of Zn–Al–Mg-coated steel exposed to a simulated polluted marine *** experiments were carried out by scanning electron microscopy for micro-morphological characterization,X-ray diffraction,electrochemical impedance spectroscopy and electrodynamic polarization curves for the aged *** analysis of the results obtained after an indoor accelerated ageing test shows that Zn–Al–Mg coatings generate insoluble Zn_(5)Cl_(2)(OH)_(8)·H_(2)O and Zn_(4)SO_(4)(OH)_(6)during the corrosion process,which hinders the diffusion of corrosive substances into the substrate,and the insoluble substances are structurally dense and thus inhibit further ***,this effectively inhibits the occurrence of further corrosion,and thus,Zn–Al–Mg coating can significantly extend the service life of Zn–Al–Mg-coated steel.

关键词： Zn-Al-Mg-coated steel Electrochemical impedance spectroscopy Polarization curve Atmospheric corrosion Marine atmosphere

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Amine-functionalized metal organic framework@graphene oxide as filler in PAEK-containing carboxyl group membrane for ultrafiltration with ultra-high permeability and strong fouling resistance

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Chinese Journal of Chemical Engineering 2024年第6期70卷 93-103页

作者： Zhaoli Wang Wenjing Li Yi Zhang Yanyin Cheng Junjian Yu Tianming Dong Xiaoyu Chi Di Liu Zhe Wang School of Chemistry and Life Science Changchun University of TechnologyChangchun 130012China Advanced Institute of Materials Science Changchun University of TechnologyChangchun 130012China Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province Changchun 130012China

Achieving high fouling resistance and permeability using membrane separation technology in water treatment processes remains a *** this work,a novel mixed-matrix membrane(MMM)(poly(arylene ether ketone)[PAEK]-containing carboxyl groups[PAEK-COOH]/UiO-66-NH_(2)@graphene oxide[GO])with superb fouling resistance and high permeability was prepared by the nonsolvent-induced phase separation method,by in-situ growth of UiO-66-NH_(2) on the GO layer,and by preparing hydrophilic *** the basis of the structure and performance analysis of the MMM,the maximum water flux reached 591.25 L·m^(-2)·h^(-1) for PAEK-COOH/UiO-66-NH_(2)@GO,whereas the retention rate for bovine serum albumin increased from 85.40%to 94.87%.As the loading gradually increased,the hydrophilicity of the MMMs increased,significantly enhancing their fouling *** strongest anti-fouling ability observed was 94.74%,which was 2.02 times greater than that of the pure *** the same time,the MMMs contained internal amide and hydrogen bonds during the preparation process,forming a cross-linked structure,which further enhanced the mechanical strength and chemical *** summary,the MMMs with high retention rate,strong permeability,and anti-fouling ability were successfully prepared.

关键词： Poly(arylene ether ketone)-containing Carboxyl groups(PAEK-COOH) UiO-66-NH_(2)@graphene oxide Hydrophilic modification Ultra-high selectivity Strong anti-fouling

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Difference analysis in terahertz wave propagation in thermochemical nonequilibrium plasma sheath under different hypersonic vehicle shapes

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Chinese Journal of Aeronautics 2023年第10期36卷 137-151页

作者： Wenchong OUYANG Qi LIU Zhengwei WU School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China Joint Laboratory of Plasma Application Technology Institute of Advanced TechnologyUniversity of Science and Technology of ChinaHefei 230031China CAS Key Laboratory of Geospace Environment University of Science and Technology of ChinaHefei 230026China

Research on terahertz communication under different vehicles has important guiding significance for the design of future hypersonic vehicle and Radio Frequency(RF)*** this paper,a joint simulation model of plasma flow under thermochemical nonequilibrium state and terahertz transmission is developed to investigate the differences in terahertz wave transmission characteristics under different vehicle shapes and the related *** comparing the plasma sheath characteristics and terahertz transmission among HIFIRE-5b(Hypersonic International Flight Research Experimentation-5b),RAM C(Radio Attenuation Measurement C)and ARD(Atmospheric Reentry Demonstrator)vehicles,it is found that the sheath thickness and electron density of ARD vehicles is significantly larger than that of HIFIRE-5b and RAM C vehicles,resulting in greater terahertz wave *** absorption plays a major role in the terahertz attenuation of vehicles,and the contribution of reflection effects is only observed in the ARD vehicle due to its larger plasma sheath thickness and spatial structure *** on the above comparison results,a shape design scheme of reducing the vehicle head and tail for mitigating RF blackout is proposed,and the scheme is proved by further analyzing the effects of different vehicle heads and tails on the terahertz *** the decrease of the head radius and tail width of hypersonic vehicle,the wave attenuation at the same terahertz frequency decreases,and the contribution of reflection effect to wave attenuation gradually ***,the shape design scheme of reducing the vehicle head and tail can effectively alleviate the RF blackout problem,which provides an important reference value for future hypersonic vehicle design.

关键词： Hypersonic vehicles Plasma flow Plasma sheaths Shape optimization Terahertz waves Wave propagation

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Indonesian Speech Content De-Identification in Low Resource Transcripts 2

Indonesian Speech Content De-Identification in Low Resource ...

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2nd Workshop in South East Asian Language Processing, SEALP 2025

作者： Abdjul, Rifqi Naufal Lestari, Dessi Puji Purwarianti, Ayu Mawalim, Candy Olivia Sakti, Sakriani Unoki, Masashi Bandung Institute of Technology Indonesia Japan Advanced Insitute of Science and Technology Japan Nara Institute of Science and Technology Japan

ISBN: (纸本)9798891762190

Advancements in technology and the increased use of digital data threaten individual privacy, especially in speech containing Personally Identifiable Information (PII). Therefore, systems that can remove or process privacy-sensitive data in speech are needed, particularly for low-resource transcripts. These transcripts are minimally annotated or labeled automatically, which is less precise than human annotation. However, using them can simplify the development of de-identification systems in any language. In this study, we develop and evaluate an efficient speech de-identification system. We create an Indonesian speech dataset containing sensitive private information and design a system with three main components: speech recognition, information extraction, and masking. To enhance performance in low-resource settings, we incorporate transcription data in training, use data augmentation, and apply weakly supervised learning. Our results show that our techniques significantly improve privacy detection performance, with approximately 29% increase in F1 score, 20% in precision, and 30% in recall with minimally labeled data. © 2025 Association for Computational Linguistics.

关键词： Differential privacy

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Organic Radical-Boosted Ionic Conductivity in Redox Polymer Electrolyte for advanced Fiber-Shaped Energy Storage Devices

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Nano-Micro Letters 2025年第8期17卷 202-218页

作者： Jeong-Gil Kim Jaehyoung Ko Hyung-Kyu Lim Yerin Jo Hayoung Yu Min Woo Kim Min Ji Kim Hyeon Su Jeong Jinwoo Lee Yongho Joo Nam Dong Kim Institute of Advanced Composite Materials Korea Institute of Science and Technology92 Chudong-roBongdong-eupWanju-gunJeollabuk-do 55324Republic of Korea Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology291 Daehak-roYuseong-guDaejeon 34141Republic of Korea Division of Chemical and Bioengineering Kangwon National UniversityChuncheon 24341Republic of Korea Department of Materials Science and Engineering Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea

Fiber-shaped energy storage devices(FSESDs)with exceptional flexibility for wearable power sources should be applied with solid electrolytes over liquid electrolytes due to short circuits and leakage issue during *** the solid options,polymer electrolytes are particularly preferred due to their robustness and flexibility,although their low ionic conductivity remains a significant ***,we present a redox polymer electrolyte(HT_RPE)with 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl(HT)as a multi-functional *** acts as a plasticizer that transforms the glassy state into the rubbery state for improved chain mobility and provides distinctive ion conduction pathway by the self-exchange reaction between radical and oxidized *** synergetic effects lead to high ionic conductivity(73.5 mS cm−1)based on a lower activation energy of 0.13 eV than other redox ***,HT_RPE with a pseudocapacitive characteristic by HT enables an outstanding electrochemical performance of the symmetric FSESDs using carbon-based fiber electrodes(energy density of 25.4 W h kg^(−1) at a power density of 25,000 W kg^(−1))without typical active materials,along with excellent stability(capacitance retention of 91.2%after 8,000 bending cycles).This work highlights a versatile HT_RPE that utilizes the unique functionality of HT for both the high ionic conductivity and improved energy storage capability,providing a promising pathway for next-generation flexible energy storage devices.

关键词： Redox polymer electrolyte Hydroxy-TEMPO Ionic conductivity Self-exchange reaction Fiber-shaped energy storage devices

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Unveiling the homogenization microstructure evolution and its effect on cellular structure for Fe-rich Sm-Co-Fe-Cu-Zr magnets

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Journal of Materials science & technology 2024年第27期194卷 142-150页

作者： Qiangfeng Li Chao Wang Lei Wang Yifei Bi Yikun Fang Yue Zhang Minggang Zhu Wei Li Division of Functional Materials Central Iron and Steel Research InstituteBeijing 100081China Academy for Advanced Interdisciplinary Science and Technology Beijing Advanced Innovation Center for Materials Genome Engineering and Beijing Key Laboratory for Advanced Energy Materials and TechnologiesSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

The solution-treated Fe-rich 2:17-type Sm-Co-based magnets generally contain an inhomogeneous mi-crostructure,which hinders the development of the complete cellular structure required for high-performance ***,the microstructure evolution of Sm(Cobal Fe_(0.31)Cu_(0.07)Zr_(0.025))_(7.7)magnet during the solution treatment is systematically *** the normal Fe-medium magnets,it was in-terestingly found that the initial-stage solution-treated Sm(Cobal Fe_(0.31)Cu_(0.07)Zr_(0.025))_(7.7)magnet possesses a profuse lamellar-type *** the lamellar-type microstructure,there are three microre-gions exhibiting an obvious difference in composition and 2:17R ordering ***,various 1:3R phases precipitated within the lamellar-type *** the disappearance of lamellar-type mi-crostructure,the 1:7H phase increased substantially,and the distribution of defect-aggregated cell bound-aries became uniform,promoting the homogeneous precipitation of 1:5H cell boundary phases during *** current study reveals a typical microstructural evolution in Fe-rich 2:17-type Sm-Co-based magnets during solution treatment.

关键词： Sm_(2)Co_(17)magnet Supersaturated solid solution Phase transformation TEM

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