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Low-rank matrix recovery with total generalized variation for defending adversarial examples

Frontiers of Information Technology & Electronic Engineering 2024年第3期25卷 432-445页

作者： wen LI Hengyou wANG Lianzhi huo Qiang HE Linlin CHEN Zhiquan HE wing w.Y.Ng School of Science Beijing University of Civil Engineering and ArchitectureBeijing 100044China School of Computer Science and Engineering South China University of TechnologyGuangzhou 510006China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China Guangdong Key Laboratory of Intelligent Information Processing Shenzhen 518060China Institute of Big Data Modeling and Technology Beijing University of Civil Engineering and ArchitectureBeijing 100044China

Low-rank matrix decomposition with first-order total variation(TV)regularization exhibits excellent performance in exploration of image *** advantage of its excellent performance in image denoising,we apply it to improve the robustness of deep neural ***,although TV regularization can improve the robustness of the model,it reduces the accuracy of normal samples due to its *** our work,we develop a new low-rank matrix recovery model,called LRTGV,which incorporates total generalized variation(TGV)regularization into the reweighted low-rank matrix recovery *** the proposed model,TGV is used to better reconstruct texture information without *** reweighted nuclear norm and Li-norm can enhance the global structure ***,the proposed LRTGV can destroy the structure of adversarial noise while re-enhancing the global structure and local texture of the *** solve the challenging optimal model issue,we propose an algorithm based on the alternating direction method of *** results show that the proposed algorithm has a certain defense capability against black-box attacks,and outperforms state-of-the-art low-rank matrix recovery methods in image restoration.

关键词： Total generalized variation Low-rank matrix Alternating direction method of multipliers Adversarial example

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Role of triggering receptor expressed on myeloid cells-1 in kidney diseases: A biomarker and potential therapeutic target

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中华医学杂志(英文版) 2024年第14期137卷 1663-1673页

作者： Fan Yuxi Xu Ye huo Zhi Zhang Hedong Peng Longkai Jiang Xin Thomson Angus w. Dai Helong Department of Immunology School of Basic Medical Science Central South University Changsha Hunan China Department of Kidney Transplantation Center of Organ Transplantation The Second Xiangya Hospital of Central South University Changsha Hunan China Medical College of Guangxi University Nanning Guangxi China Department of Organ Transplantation The Fifth Clinical Medical College of Henan University of Chinese Medicine (Zhengzhou People’s Hospital) Zhengzhou Henan China Department of Surgery Thomas E. Starzl Transplantation Institute University of Pittsburgh School of Medicine Pittsburgh PA USA

Triggering receptor expressed on myeloid cells-1 (TREM-1) is a member of the immunoglobulin superfamily. As an amplifier of the inflammatory response, TREM-1 is mainly involved in the production of inflammatory mediators and the regulation of cell survival. TREM-1 has been studied in infectious diseases and more recently in non-infectious disorders. More and more studies have shown that TREM-1 plays an important pathogenic role in kidney diseases. There is evidence that TREM-1 can not only be used as a biomarker for diagnosis of disease but also as a potential therapeutic target to guide the development of novel therapeutic agents for kidney disease. This review summarized molecular biology of TREM-1 and its signaling pathways as well as immune response in the progress of acute kidney injury, renal fibrosis, diabetic nephropathy, immune nephropathy, and renal cell carcinoma.

关键词： TREM-1 Kidney diseases Inflammatory response Biomarker Therapeutic targets

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Numerical Study on the Effect of Gap Diffraction on the Hydrodynamic Performance of A Floating Breakwater

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China Ocean Engineering 2024年第4期38卷 663-675页

作者： BIAN Xiang-qian JI Chun-yan XU Sheng GUO Jian-ting huo Fa-li School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China

Two-dimensional(2D)flume experiments are useful in investigating the performances of floating breakwaters(FBs),including hydrodynamic performances,motion responses,and mooring *** a reasonable gap between the flume wall and the FBs is a critical step in 2D flume ***,research on the effect of the gap on the accuracy of 2D FB experimental results is *** address this issue,a numerical wave tank is developed using CFD to estimate the wave-FB interaction of a moored dual-cylindrical FB,and the results are compared to experimental data from a previously published *** is good agreement between them,indicating that the numerical model is sufficiently *** numerical model is then applied to explore the effect of gap diffraction on the performance of FBs in2D *** was discovered that the nondimensional gap length L_(Gap)/w_(Pool)should be smaller than 7.5%to ensure that the relative error of the transmission coefficient is smaller than 3%.The influence of the gap is also related to the entering wave properties,such as the wave height and period.

关键词： floating breakwater diffraction effect gap hydrodynamic performance model experiments CFD numerical simulation

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HSA shrinkage optimizes the photostability of embedded dyes fundamentally to amplify their efficiency as photothermal materials

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Chinese Chemical Letters 2024年第8期35卷 211-216页

作者： Yongkang Yue Zhou Xu Kaiqing Ma Fangjun huo Xuemei Qin Kuanshou Zhang Caixia Yin Department Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Institute of Molecular ScienceShanxi UniversityTaiyuan 030006China Department Modern Research Center for Traditional Chinese Medicine Shanxi UniversityTaiyuan 030006China Research Institute of Applied Chemistry Shanxi UniversityTaiyuan 030006China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China

Focused on the performance promotion of organic small molecular dyes based photothermal agents via non-chemical modification,we found that heat-assisted binding of human serum albumin(HSA)to the dye causes shrinkage of the protein and encapsulate the dye to form *** revolutionizes the photostability of small molecule dyes which further improves their photothermal conversion effi-ciency and tumor ablation performance as photothermal agents *** this work,the obtained photothermal agent named HSA-P2-T could accumulate in tumor and induce 22℃enhancement of the tumor in xenograft models upon ultra-low dose(0.1 w/cm^(2))laser irradiation,which,as far as we know,is the lowest laser dose used in vivo photothermal *** HSA-P2-T,we realized tumor ablation upon twice intravenous injections of the nanoparticles and four photothermal treatments.

关键词： Photothermal therapy Cyanine dyes Photostability Albumin Encapsulation

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A breathable, designable and flexible leather–heater used in wearable thermotherapy

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Science China(Technological Sciences) 2024年第7期67卷 2125-2132页

作者： ZHU JingYu LIU YaDong XIE RuiJie ZHAO YuHan wANG Feng LIU YunQing ZHA BaoLi wU Jiansheng huo Fengwei Key Laboratory of Flexible Electronics(KLOFE) School of Flexible Electronics(Future Technologies)Institute of Advanced Materials(IAM)Nanjing Tech UniversityNanjing 211816China The Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Tan Kah Kee Innovation Laboratory Xiamen 361102China

Flexible heaters with personal thermal management capabilities have great potential in thermal therapy applications due to their excellent flexibility, low power consumption, and portability. However, manufacturing wearable heating devices that are breathable, wear resistant and conformal for long-term use is still challenging. To address these issues, we designed a leather heater using breathable, biocompatible, and tailorable leather as the substrate through a simple in-situ polymerization polypyrrole strategy. This heater exhibits excellent heating and mechanical properties(reaching 64℃ at a voltage of 5 V with efficient Joule heat generation of 2286 w/m^(2)and uniform temperature distribution, and functioning properly after 1000 cycles of bendability tests). In addition, this heater displays better wear resistance and water vapor permeability rate(38.04 g/(m^(2)h)). The cuttable and sewable of leather gives the strategy ability to be flexibly designed to mold the heater to the specific requirements of different body parts, providing a new approach to wearable thermal therapy.

关键词： flexible electronics leather thermotherapy

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wind power data pricing method based on an alliance cooperation game

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Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control 2024年第19期52卷 97-107页

作者： huo w. Zhang Y. Zhao H. wang J. School of Electrical Engineering Xi’an Jiaotong University Xi’an 710049 China

To give full play to the value of wind power data and bring extra profit to a wind farm, this paper proposes a wind power data pricing method based on alliance cooperation game theory. First, a wind power data trading process and pricing approach considering third-party supervision are proposed. Secondly, adjacent station data is obtained through data trading, and a vector autoregressive model is used to improve wind power forecasting accuracy, thereby reducing imbalance costs in electricity market transactions, increasing the overall generation profit of wind power plants, and reflecting the value of the traded data. Then, the excess profit generated before and after data trading (i.e., the increase in generation profit using traded data) is distributed to the data sellers as the pricing of the traded data using an alliance cooperation game, quantitatively measuring the value of the data. Finally, considering the spatio-temporal characteristics of wind power, the data trading parties are determined by maximizing the data value, achieving fair and reasonable data pricing. The case analysis results demonstrate that the proposed method can enhance wind power forecasting accuracy, increase wind farm generation profits, and achieve fairness and rationality in wind power data pricing. © 2024 Power System Protection and Control Press. All rights reserved.

关键词： cooperative game data pricing electric data trading electricity market wind power forecasting

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Flexible UV detectors based on in-situ hydrogen doped amorphous Ga_(2)O_(3) with high photo-to-dark current ratio

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Materials Futures 2024年第1期3卷 181-189页

作者： Yanxin Sui Huili Liang wenxing huo Xiaozhi Zhan Tao Zhu Zengxia Mei Songshan Lake Materials Laboratory DongguanGuangdong 523808People’s Republic of China Institute of Physics Chinese Academy of SciencesBeijing 100190People’s Republic of China Department of Biomedical Engineering Tianjin University92 Weijin RoadTianjin 300072People’s Republic of China China Spallation Neutron Source DongguanGuangdong 523803People’s Republic of China

Amorphous Ga_(2)O_(3)(a-Ga_(2)O_(3))has been attracting more and more attention due to its unique merits such as wide bandgap(∼4.9 eV),low growth temperature,large-scale uniformity,low cost and energy efficient,making it a powerful competitor in flexible deep ultraviolet(UV)*** the responsivity of the ever-reported a-Ga_(2)O_(3)UV photodetectors(PDs)is usually in the level of hundreds of A/w,it is often accompanied by a large dark current due to the presence of abundant oxygen vacancy(VO)defects,which severely limits the possibility to detect weak signals and achieve versatile *** this work,the VO defects in a-Ga_(2)O_(3)thin films are successfully passivated by in-situ hydrogen doping during the magnetron sputtering *** a result,the dark current of a-Ga_(2)O_(3)UV PD is remarkably suppressed to 5.17×10^(-11) A at a bias of 5 ***,the photocurrent of the corresponding device is still as high as 1.37×10^(-3)A,leading to a high photo-to-dark current ratio of 2.65×107 and the capability to detect the UV light with the intensity below 10 nw cm^(-2).Moreover,the H-doped a-Ga_(2)O_(3)thin films have also been deposited on polyethylene naphtholate substrates to construct flexible UV PDs,which exhibit no great degradation in bending states and fatigue *** results demonstrate that hydrogen doping can effectively improve the performance of a-Ga_(2)O_(3)UV PDs,further promoting its practical application in various areas.

关键词： Ga_(2)O_(3) hydrogen doping ultraviolet photodetector photo-to-dark current ratio neutron reflection

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Investigation into epitaxial growth optimization of a novel AlGaN/GaN HEMT structure for application in UV photodetectors

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Science China Materials 2024年第9期67卷 2828-2837页

作者： Zhiyuan Liu wanglong wu Xiong Yang Menglong Zhang Lixiang Han Jianpeng Lei Quansheng Zheng Nengjie huo Xiaozhou wang Jingbo Li School of Semiconductor Science and Technology Guangdong Provincial Key Laboratory of Chip and Integration TechnologySouth China Normal UniversityFoshan528225China College of Optical Science and Engineering Zhejiang UniversityHangzhou310027China Zhejiang Xinke Semiconductor Co. Ltd.Hangzhou311400China Jiangxi Engineering Laboratory for Optoelectronics Testing Technology Nanchang Hangkong UniversityNanchang330063China Department of Applied Physics School of Physics and ElectronicsHunan UniversityChangsha410082China

In this work,a novel ultraviolet(UV)photodetector(PD)based on AlGaN/u-GaN/p-GaN/u-GaN heterojunction high electron mobility transistor(HEMT)has been *** HEMT epilayer is grown using the metal-organic chemical vapor deposition(MOCVD)technique,and the growth parameters,including the AlGaN growth temperature,preheating temperature of the p-GaN layer,and NH3/N2 flow rate,are optimized to improve the quality of the *** optimized epilayer exhibits a flat surface with a root mean square value of 0.146 nm and low dislocation *** p-GaN thickness in epitaxial wafers has a significant influence on electrical and UV *** a p-GaN of 1µm,the UV PD demonstrates a significant switching ratio and transconductance of 107 and 127.3 mS mm^(-1),*** as a UV PD,it also exhibits a high light on/off ratio(I_(light)/I_(dark))of 6.35×10^(5),a high responsivity(R)of 48.11 A w^(-1),and a detectivity(D*)of 6.85×10^(12)Jones under 365-nm UV illumination with light power density of 86.972 mw cm^(-2).The high-performance HEMT and UV detectors,which incorporate p-GaN etchless technology,have been refined through advancements in epitaxial growth and structural *** improvements solidify the groundwork for large-scale manufacturing of UV communication systems and laser diodes.

关键词： AlGaN/GaN-based HEMT epitaxial growth by MOCVD p-GaN/u-GaN junction UV photodetector

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Structural transition,electric transport,and electronic structures in the compressed trilayer nickelate La4Ni3O10

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Science China(Physics,Mechanics & Astronomy) 2024年第11期Mechanics & Astronomy) .卷 13-19页

作者： Jingyuan Li Cui-Qun Chen Chaoxin Huang Yifeng Han Mengwu huo Xing Huang Peiyue Ma Zhengyang Qiu Junfeng Chen Xunwu Hu Lan Chen Tao Xie Bing Shen Hualei Sun Dao-Xin Yao Meng wang Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices School of Physics Sun Yat-sen University Center for Materials of the Universe School of Molecular Sciences Arizona State University School of Sciences Sun Yat-sen University

Atomic structure and electronic band structure are fundamental properties for understanding the mechanism of superconductivity. Motivated by the discovery of pressure-induced high-temperature superconductivity at 80 K in the bilayer Ruddlesden-Popper nickelate La3Ni2O7, the atomic structure and electronic band structure of the trilayer nickelate La4Ni3O10under pressure up to 44.3 GPa are investigated. A structural transition from the monoclinic P21/a space group to the tetragonal I4/mmm around 12.6-13.4 GPa is identified, accompanied by a drop of resistance below 7 K. Density functional theory calculations suggest that the bonding state of Ni 3dz2orbital rises and crosses the Fermi level at high pressures, which may give rise to possible superconductivity observed in resistance under pressure in La4Ni3O10. The trilayer nickelate La4Ni3O10shows some similarities with the bilayer La3Ni2O7and has unique properties, providing a new platform to investigate the underlying mechanism of superconductivity in nickelates.

关键词： La4Ni3O10 high pressure synchrotron X-ray diffraction structural transition DFT calculations

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Low-Voltage IGZO Field-Effect Ultraviolet Photodiode

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Chinese Physics Letters 2024年第6期41卷 156-161,I0001-I0003页

作者：宋双梁会力霍文星张广张永晖王绩伟梅增霞 Songshan Lake Materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China College of Physics Liaoning UniversityShenyang 110036China Department of Instruments Science and Technology School of Precision Instrument and Opto-electronics EngineeringTianjin UniversityTianjin 300072China National Key Laboratory of Scattering and Radiation Beijing 100039China School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China

In the era of Internet of Things(Io Ts),an energy-efficient ultraviolet(UV)photodetector(PD)is highly desirable considering the massive usage scenarios such as environmental sterilization,fire alarm and corona discharge *** far,common self-powered UV PDs are mainly based on metal-semiconductor heterostructures or p–n heterojunctions,where the limited intrinsic built-in electric field restricts further enhancement of the *** this work,an extremely low-voltage field-effect UV PD is proposed using a gatedrain shorted amorphous IGZO(a-IGZO)thin film transistor(TFT)architecture.A combined investigation of the experimental measurements and technology computer-aided design(TCAD)simulations suggests that the reverse current(ⅠR)of field-effect diode(FED)is highly related with the threshold voltage(Vth)of the parental TFT,implying an enhancement-mode TFT is preferable to fabricate the field-effect UV PD with low dark *** by a low bias of-0.1 V,decent UV response has been realized including large UV/visible(R_(300)/R_(550))rejection ratio(1.9×10^(3)),low dark current(1.15×10^(-12)A)as well as high photo-to-dark current ratio(PDCR,~10^(3))and responsivity(1.89 A/w).This field-effect photodiode provides a new platform to construct UV PDs with well-balanced photoresponse performance at a low bias,which is attractive for designs of large-scale smart sensor networks with high energy efficiency.

关键词： IGZO attractive ultraviolet

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