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  1. Buch ; Online: FedBone

    Chen, Yiqiang / Zhang, Teng / Jiang, Xinlong / Chen, Qian / Gao, Chenlong / Huang, Wuliang

    Towards Large-Scale Federated Multi-Task Learning

    2023  

    Abstract: Heterogeneous federated multi-task learning (HFMTL) is a federated learning technique that combines heterogeneous tasks of different clients to achieve more accurate, comprehensive predictions. In real-world applications, visual and natural language ... ...

    Abstract Heterogeneous federated multi-task learning (HFMTL) is a federated learning technique that combines heterogeneous tasks of different clients to achieve more accurate, comprehensive predictions. In real-world applications, visual and natural language tasks typically require large-scale models to extract high-level abstract features. However, large-scale models cannot be directly applied to existing federated multi-task learning methods. Existing HFML methods also disregard the impact of gradient conflicts on multi-task optimization during the federated aggregation process. In this work, we propose an innovative framework called FedBone, which enables the construction of large-scale models with better generalization from the perspective of server-client split learning and gradient projection. We split the entire model into two components: a large-scale general model (referred to as the general model) on the cloud server and multiple task-specific models (referred to as the client model) on edge clients, solving the problem of insufficient computing power on edge clients. The conflicting gradient projection technique is used to enhance the generalization of the large-scale general model between different tasks. The proposed framework is evaluated on two benchmark datasets and a real ophthalmic dataset. Comprehensive results demonstrate that FedBone efficiently adapts to heterogeneous local tasks of each client and outperforms existing federated learning algorithms in most dense prediction and classification tasks with off-the-shelf computational resources on the client side.
    Schlagwörter Computer Science - Machine Learning
    Thema/Rubrik (Code) 006 ; 004
    Erscheinungsdatum 2023-06-30
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Artikel ; Online: FedEYE: A scalable and flexible end-to-end federated learning platform for ophthalmology.

    Yan, Bingjie / Cao, Danmin / Jiang, Xinlong / Chen, Yiqiang / Dai, Weiwei / Dong, Fan / Huang, Wuliang / Zhang, Teng / Gao, Chenlong / Chen, Qian / Yan, Zhen / Wang, Zhirui

    Patterns (New York, N.Y.)

    2024  Band 5, Heft 2, Seite(n) 100928

    Abstract: Data-driven machine learning, as a promising approach, possesses the capability to build high-quality, exact, and robust models from ophthalmic medical data. Ophthalmic medical data, however, presently exist across disparate data silos with privacy ... ...

    Abstract Data-driven machine learning, as a promising approach, possesses the capability to build high-quality, exact, and robust models from ophthalmic medical data. Ophthalmic medical data, however, presently exist across disparate data silos with privacy limitations, making centralized training challenging. While ophthalmologists may not specialize in machine learning and artificial intelligence (AI), considerable impediments arise in the associated realm of research. To address these issues, we design and develop FedEYE, a scalable and flexible end-to-end ophthalmic federated learning platform. During FedEYE design, we adhere to four fundamental design principles, ensuring that ophthalmologists can effortlessly create independent and federated AI research tasks. Benefiting from the design principles and architecture of FedEYE, it encloses numerous key features, including rich and customizable capabilities, separation of concerns, scalability, and flexible deployment. We also validated the applicability of FedEYE by employing several prevalent neural networks on ophthalmic disease image classification tasks.
    Sprache Englisch
    Erscheinungsdatum 2024-02-02
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 2666-3899
    ISSN (online) 2666-3899
    DOI 10.1016/j.patter.2024.100928
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Facilitating alkaline hydrogen evolution reaction on the hetero-interfaced Ru/RuO

    Zhu, Yiming / Klingenhof, Malte / Gao, Chenlong / Koketsu, Toshinari / Weiser, Gregor / Pi, Yecan / Liu, Shangheng / Sui, Lijun / Hou, Jingrong / Li, Jiayi / Jiang, Haomin / Xu, Limin / Huang, Wei-Hsiang / Pao, Chih-Wen / Yang, Menghao / Hu, Zhiwei / Strasser, Peter / Ma, Jiwei

    Nature communications

    2024  Band 15, Heft 1, Seite(n) 1447

    Abstract: Exploring an active and cost-effective electrocatalyst alternative to carbon-supported platinum nanoparticles for alkaline hydrogen evolution reaction (HER) have remained elusive to date. Here, we report a catalyst based on platinum single atoms (SAs) ... ...

    Abstract Exploring an active and cost-effective electrocatalyst alternative to carbon-supported platinum nanoparticles for alkaline hydrogen evolution reaction (HER) have remained elusive to date. Here, we report a catalyst based on platinum single atoms (SAs) doped into the hetero-interfaced Ru/RuO
    Sprache Englisch
    Erscheinungsdatum 2024-02-16
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-45654-9
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel: Performance optimization of LSCF/Gd:CeO

    Tomov, R I / Mitchell-Williams, Tom / Gao, Chenlong / Kumar, R V / Glowacki, B A

    Journal of applied electrochemistry

    2017  Band 47, Heft 5, Seite(n) 641–651

    Sprache Englisch
    Erscheinungsdatum 2017-03-27
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article
    ZDB-ID 120133-5
    ISSN 0021-891X
    ISSN 0021-891X
    DOI 10.1007/s10800-017-1066-1
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel: Introduction of ‘lattice-voids’ in high tap density TiO2-B nanowires for enhanced high-rate and high volumetric capacity lithium storage

    Su, Zhong / Gao, Chenlong / Kumar, R. Vasant / Lai, Chao / Peng, Xiaoyu / Wu, Zhenzhen / Xi, Kai / Zhu, Yuxuan

    RSC advances. 2014 May 30, v. 4, no. 44

    2014  

    Abstract: TiO2-B nanowires with a high tap density, containing structural lattice voids within each nanowire, are prepared via a tailored hydrothermal–calcination route. These internal voids, formed by controlling the calcination temperature as clusters of vacant ... ...

    Abstract TiO2-B nanowires with a high tap density, containing structural lattice voids within each nanowire, are prepared via a tailored hydrothermal–calcination route. These internal voids, formed by controlling the calcination temperature as clusters of vacant sites enable fast transport of lithium-ions within the lattice material, lead to enhanced high-rate performance of a TiO2-B nanowire based electrode in a Li-ion battery. At a current density of 2000 mA g−1, a high value of discharge capacity at 129.0 mA h g−1 is retained after 80 cycles. Our results indicate that electrodes based on this nanowire material with ‘lattice-void’ structure and high tap density, meet the challenge of achieving a high-rate performance and a high volumetric density in Li-ion batteries.
    Schlagwörter electrodes ; lithium ; lithium batteries ; nanowires ; temperature
    Sprache Englisch
    Erscheinungsverlauf 2014-0530
    Umfang p. 22989-22994.
    Erscheinungsort The Royal Society of Chemistry
    Dokumenttyp Artikel
    ISSN 2046-2069
    DOI 10.1039/c4ra01259c
    Datenquelle NAL Katalog (AGRICOLA)

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  6. Artikel ; Online: Rapid determination of neomycin in biological samples using fluorescent sensor based on quantum dots with doubly selective binding sites.

    Wan, Ying-Chun / Liu, Yan-Jie / Liu, Chen / Ma, Hui-Ting / Yu, Hui-Fang / Kang, Jia-Wei / Gao, Chen-Long / Wu, Zhong-Qiao / Zheng, Dan / Lu, Bin

    Journal of pharmaceutical and biomedical analysis

    2018  Band 154, Seite(n) 75–84

    Abstract: A new analytical method was developed to detect neomycin in complex biological samples using molecularly imprinted polymer to construct an optical sensor. Fluorescent neomycin-imprinted polymers (fMIPs) containing both imprinted cavity and boronate ... ...

    Abstract A new analytical method was developed to detect neomycin in complex biological samples using molecularly imprinted polymer to construct an optical sensor. Fluorescent neomycin-imprinted polymers (fMIPs) containing both imprinted cavity and boronate affinity site were synthesized on the surface of silica-modified quantum dots. The fMIPs exhibited high selectivity to neomycin by having two binding sites for the target analyte. Neomycin analogues (competing for imprinted cavity) and D-glucose (competing for the boronate affinity site) did not affect the selectivity of the fMIPs. When combined with a fluorescent microplate reader, the obtained fMIP sensor displayed a linear concentration-dependent fluorescence quenching in response to neomycin in the range of 2-1000 μg/L, with a limit of detection as 0.16 μg/L. The fMIP sensor was able to detect trace neomycin in biological samples accurately after simple sample pre-treatment. The sensitivity of the fMIP sensor was higher than HPLC equipped with a fluorescence detector. The fMIP sensor containing the doubly selective binding sites provides a selective, sensitive, accurate, and high through-put approach for neomycin monitoring.
    Mesh-Begriff(e) Anti-Bacterial Agents/analysis ; Anti-Bacterial Agents/chemistry ; Binding Sites ; Boronic Acids/chemistry ; Drug Monitoring/instrumentation ; Drug Monitoring/methods ; Fluorescent Dyes/chemistry ; High-Throughput Screening Assays/instrumentation ; High-Throughput Screening Assays/methods ; Limit of Detection ; Molecular Imprinting ; Neomycin/analysis ; Neomycin/chemistry ; Polymers/chemistry ; Quantum Dots/chemistry ; Silicon Dioxide/chemistry
    Chemische Substanzen Anti-Bacterial Agents ; Boronic Acids ; Fluorescent Dyes ; Polymers ; Neomycin (1404-04-2) ; Silicon Dioxide (7631-86-9)
    Sprache Englisch
    Erscheinungsdatum 2018-02-22
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 604917-5
    ISSN 1873-264X ; 0731-7085
    ISSN (online) 1873-264X
    ISSN 0731-7085
    DOI 10.1016/j.jpba.2018.02.028
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: Binder free three-dimensional sulphur/few-layer graphene foam cathode with enhanced high-rate capability for rechargeable lithium sulphur batteries.

    Xi, Kai / Kidambi, Piran R / Chen, Renjie / Gao, Chenlong / Peng, Xiaoyu / Ducati, Caterina / Hofmann, Stephan / Kumar, R Vasant

    Nanoscale

    2014  Band 6, Heft 11, Seite(n) 5746–5753

    Abstract: A novel ultra-lightweight three-dimensional (3-D) cathode system for lithium sulphur (Li-S) batteries has been synthesised by loading sulphur on to an interconnected 3-D network of few-layered graphene (FLG) via a sulphur solution infiltration method. A ... ...

    Abstract A novel ultra-lightweight three-dimensional (3-D) cathode system for lithium sulphur (Li-S) batteries has been synthesised by loading sulphur on to an interconnected 3-D network of few-layered graphene (FLG) via a sulphur solution infiltration method. A free-standing FLG monolithic network foam was formed as a negative of a Ni metallic foam template by CVD followed by etching away of Ni. The FLG foam offers excellent electrical conductivity, an appropriate hierarchical pore structure for containing the electro-active sulphur and facilitates rapid electron/ion transport. This cathode system does not require any additional binding agents, conductive additives or a separate metallic current collector thus decreasing the weight of the cathode by typically ∼20-30 wt%. A Li-S battery with the sulphur-FLG foam cathode shows good electrochemical stability and high rate discharge capacity retention for up to 400 discharge/charge cycles at a high current density of 3200 mA g(-1). Even after 400 cycles the capacity decay is only ∼0.064% per cycle relative to the early (e.g. the 5th cycle) discharge capacity, while yielding an average columbic efficiency of ∼96.2%. Our results indicate the potential suitability of graphene foam for efficient, ultra-light and high-performance batteries.
    Sprache Englisch
    Erscheinungsdatum 2014-06-07
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/c4nr00326h
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Synthesis of semiconducting polymer microparticles as solid ionophore with abundant complexing sites for long-life Pb(II) sensors.

    Huang, Mei-Rong / Ding, Yong-Bo / Li, Xin-Gui / Liu, YingJun / Xi, Kai / Gao, Chen-Long / Kumar, R Vasant

    ACS applied materials & interfaces

    2014  Band 6, Heft 24, Seite(n) 22096–22107

    Abstract: Intrinsically electrically semiconducting microparticles of semiladder poly(m-phenylenediamine-co-2-hydroxy-5-sulfonic aniline) structures containing abundant functional groups, like -NH-, -N=, -NH2, -OH, -SO3H as complexation sites, were efficiently ... ...

    Abstract Intrinsically electrically semiconducting microparticles of semiladder poly(m-phenylenediamine-co-2-hydroxy-5-sulfonic aniline) structures containing abundant functional groups, like -NH-, -N=, -NH2, -OH, -SO3H as complexation sites, were efficiently synthesized by chemical oxidative copolymerization of m-phenylenediamine and 2-hydroxy-5-sulfonic aniline. The obtained copolymers were found to be nonporous spherical microparticles that were able to achieve greater π-conjugated structure, smaller particle aggregate size, and stronger interaction with Pb(II) ions than poly(m-phenylenediamine) containing only -NH-, -N=, and -NH2. A potentiometric Pb(II) sensor was fabricated on the basis of the copolymer microparticles as a crucial solid ionophore component within plasticized PVC. The sensor exhibited a Nernstian response to Pb(II) ions over a wide concentration range, together with a fast response, a wide pH range capability, a long lifetime of up to 5 months, and good selectivity over a wide variety of other ions and redox species. The process for synthesizing the microparticles and fabricating the Pb(II)-sensor can be facilely scaled-up for use in the straightforward long-term online monitoring of Pb(II) ions in heavily polluted wastewaters. This study develops an understanding of the facile synthesis of conducting microparticles bearing many functional groups and their structures governing the potentiometric susceptibility toward interaction between Pb(II) ions and the microparticles for fabricating robust long-lived Pb(II)-sensor, signifying the potential suitability of such novel materials for inexpensive sensitive detection of Pb(II) ions.
    Sprache Englisch
    Erscheinungsdatum 2014-12-24
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/am505463f
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel: Synthesis of Semiconducting Polymer Microparticles as Solid Ionophore with Abundant Complexing Sites for Long-Life Pb(II) Sensors

    Huang, Mei-Rong / Ding Yong-Bo / Gao Chen-Long / Kumar R. Vasant / Li Xin-Gui / Liu YingJun / Xi Kai

    ACS Applied Materials & Interfaces. 2014 Dec. 24, v. 6, no. 24

    2014  

    Abstract: Intrinsically electrically semiconducting microparticles of semiladder poly(m-phenylenediamine-co-2-hydroxy-5-sulfonic aniline) structures containing abundant functional groups, like NH, N=, NH₂, OH, SO₃H as complexation sites, were ...

    Abstract Intrinsically electrically semiconducting microparticles of semiladder poly(m-phenylenediamine-co-2-hydroxy-5-sulfonic aniline) structures containing abundant functional groups, like NH, N=, NH₂, OH, SO₃H as complexation sites, were efficiently synthesized by chemical oxidative copolymerization of m-phenylenediamine and 2-hydroxy-5-sulfonic aniline. The obtained copolymers were found to be nonporous spherical microparticles that were able to achieve greater π-conjugated structure, smaller particle aggregate size, and stronger interaction with Pb(II) ions than poly(m-phenylenediamine) containing only NH, N=, and NH₂. A potentiometric Pb(II) sensor was fabricated on the basis of the copolymer microparticles as a crucial solid ionophore component within plasticized PVC. The sensor exhibited a Nernstian response to Pb(II) ions over a wide concentration range, together with a fast response, a wide pH range capability, a long lifetime of up to 5 months, and good selectivity over a wide variety of other ions and redox species. The process for synthesizing the microparticles and fabricating the Pb(II)-sensor can be facilely scaled-up for use in the straightforward long-term online monitoring of Pb(II) ions in heavily polluted wastewaters. This study develops an understanding of the facile synthesis of conducting microparticles bearing many functional groups and their structures governing the potentiometric susceptibility toward interaction between Pb(II) ions and the microparticles for fabricating robust long-lived Pb(II)-sensor, signifying the potential suitability of such novel materials for inexpensive sensitive detection of Pb(II) ions.
    Schlagwörter aniline ; composite polymers ; ions ; lead ; monitoring ; pH ; wastewater
    Sprache Englisch
    Erscheinungsverlauf 2014-1224
    Umfang p. 22096-22107.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ISSN 1944-8252
    DOI 10.1021%2Fam505463f
    Datenquelle NAL Katalog (AGRICOLA)

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