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FSCIL-EACA: Few-Shot Class-Incremental Learning Network Based on Embedding Augmentation and Classifier Adaptation for Image Classification

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Chinese Journal of Electronics 2024年第1期33卷 139-152页

作者： ruru ZHANG Haihong E Meina SONG School of Computer Science Beijing University of Posts and Telecommunications Education Department Information Network Engineering Research Center Beijing University of Posts and Telecommunications

The ability to learn incrementally is critical to the long-term operation of AI systems. Benefiting from the power of few-shot class-incremental learning(FSCIL), deep learning models can continuously recognize new classes with only a few samples. The difficulty is that limited instances of new classes will lead to overfitting and exacerbate the catastrophic forgetting of the old classes. Most previous works alleviate the above problems by imposing strong constraints on the model structure or parameters, but ignoring embedding network transferability and classifier adaptation(CA), failing to guarantee the efficient utilization of visual features and establishing relationships between old and new classes. In this paper, we propose a simple and novel approach from two perspectives: embedding bias and classifier bias. The method learns an embedding augmented(EA) network with cross-class transfer and class-specific discriminative abilities based on self-supervised learning and modulated attention to alleviate embedding bias. Based on the adaptive incremental classifier learning scheme to realize incremental learning capability,guiding the adaptive update of prototypes and feature embeddings to alleviate classifier bias. We conduct extensive experiments on two popular natural image datasets and two medical datasets. The experiments show that our method is significantly better than the baseline and achieves state-of-the-art results.

关键词： Training Adaptation models Visualization Image recognition Prototypes Self-supervised learning Power capacitors

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Combination of methylthio-chemistry with living crystallization-driven self-assembly toward uniformπ-conjugated nanostructures with antibacterial activity,surface tailorability,tunable morphology and dimension

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Science China Chemistry 2024年第7期67卷 2341-2352页

作者： Chuyu Duan Binbin Xu ruru Li Xiaoyu Huang Shaoliang Lin Chun Feng Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Living crystallization-driven self-assembly(CDSA)provides robust access to uniformπ-conjugated nanostructures(CNSs)from block copolymers(BCPs)containing a crystallineπ-conjugated segment with controlled dimension,morphology and composition,which show appealing applications in biomedicine,photocatalysis and *** further expand the application spectrum of these CNSs,the development of facile strategies toward diverse CNSs with varying structures/functionalities is highly ***,BCPs consisting of oligo(p-phenylene ethynylene)-b-poly(polypropyl-3-methanethiol acrylate)(OPE_(9)-bPMTPA35and OPE_(9)-b-PMTPA_(58);the subscript represents the number of repeat unit of each block)consisting of a crystallineπ-conjugated core-forming OPE_(9)segment and a corona-forming PMTPA block are *** efficient“click-type”alkylation of methylthio groups,OPE_(9)-b-PMTPA with varying contents of sulfonium unit is *** ribbon-like micelles with different widths and lengths can then be generated in a controlled manner via the self-seeding approach of living ***,negatively charged polymeric and Ag nanoparticles can be immobilized on sulfonium/methylthio-containing shells by taking advantage of electrostatic attraction and coordination interaction,***,the ribbon-like micelles with positively charged shells exhibit antibacterial activity against *** the ease of modification of PMTPA-based shell and attractive opto-electronic/photocatalytic properties ofπ-conjugated units,the combination of methylthio-chemistry and living CDSA opens a new avenue to generate multi-functional CNSs for widespread applications from biomedicine to photocatalysis.

关键词： crystallization-driven self-assembly block copolymer π-conjugated nanostructure methylthio-chemistry

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Semantic segmentation of agricultural images:A survey

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Information Processing in Agriculture 2024年第2期11卷 172-186页

作者： Zifei Luo Wenzhu Yang Yunfeng Yuan ruru Gou Xiaonan Li School of Cyber Security and Computer Hebei UniversityHebei 071002China Hebei Machine Vision Engineering Research Center BaodingHebei 071002China College of Education Hebei UniversityHebei 071002China

As an important research topic in recent years,semantic segmentation has been widely applied to image understanding problems in various *** the successful application of deep learning methods in machine vision,the superior performance has been transferred to agricultural image processing by combining them with traditional *** segmentation methods have revolutionized the development of agricultural automation and are commonly used for crop cover and type analysis,pest and disease identification,*** frst give a review of the recent advances in traditional and deep learning methods for semantic segmentation of agricultural images according to different segmentation *** we introduce the traditional methods that can effectively utilize the original image information and the powerful performance of deep learningbased ***,we outline their applications in agricultural image *** our literature,we identify the challenges in agricultural image segmentation and summarize the innovative developments that address these *** robustness of the existing segmentation methods for processing complex images still needs to be improved urgently,and their generalization abilities are also *** particular,the limited number of labeled samples is a roadblock to new developed deep learning methods for their training and *** this,segmentation methods that augment the dataset or incorporate multimodal information enable deep learning methods to further improve the segmentation *** review provides a reference for the application of image semantic segmentation in the field of agricultural informatization.

关键词： Semantic segmentation Agricultural images Deep learning Convolution neural networks

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Interfacial engineering of the layered oxide cathode materials for sodium-ion battery

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Nano Research 2024年第3期17卷 1441-1464页

作者： Quanqing Zhao ruru Wang Ming Gao Faheem KButt Jianfeng Jia Haishun Wu Youqi Zhu Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan 030032China Metals and Chemistry Research Institute China Academy of Railway Sciences Corporation LimitedBeijing 100081China Department of Physics Division of Science and TechnologyUniversity of EducationLahore 54770Pakistan Research Center of Materials Science Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green ApplicationsBeijing Institute of TechnologyBeijing 100081China

The layered metal oxides are reviewed as the hopeful cathode materials for high-performance sodium-ion batteries(SIBs)due to their large theoretical capacity,favorable two-dimensional(2D)ion diffusion channel,and simple ***,their cycling stability,rate capability,and thermal stability are still significantly concerned and highlighted before further practical *** chemical,mechanical and electrochemical stability of the cathode–electrolyte interfaces upon cycling is of great ***,the unique structural and electrochemical properties of the layered oxide cathode materials for SIB are *** mechanism of bulk/surface degradation induced by oxygen evolution,phase transition,microcrack,and electrolyte decomposition is thoroughly ***,the interfacial engineering to construct stable interface through various effective methods is fully *** future outlook and challenges for interfacial engineering in this filed are also *** review should shed light on the rational design and construct of robust interface for applications of superior layered oxide cathodes in SIB and may suggest future research directions.

关键词： interfacial engineering sodium-ion battery layered oxide electrolyte interface

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Phase-engineering modulation of Mn-based oxide cathode for constructing super-stable sodium storage

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Journal of Energy Chemistry 2024年第1期88卷 421-427,I0010页

作者： Quanqing Zhao ruru Wang Ming Gao Bolin Liu Jianfeng Jia Haishun Wu Youqi Zhu Chuanbao Cao Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan 030032ShanxiChina Metals and Chemistry Research Institute China Academy of Railway Sciences Corporation LimitedBeijing 100081China Research Center of Materials Science Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green ApplicationsBeijing Institute of TechnologyBeijing 100081China

The Mn-based oxide cathode with enriched crystal phase structure and component diversity can provide the excellent chemistry structure for Na-ion ***,the broad application prospect is obstructed by the sluggish Na^(+)kinetics and the phase transitions upon ***,we establish the thermodynamically stable phase diagram of various Mn-based oxide composites precisely controlled by sodium content tailoring strategy coupling with co-doping and solid-state *** chemical environment of the P2/P'3 and P2/P3 biphasic composites indicate that the charge compensation mechanism stems from the cooperative contribution of anions and *** from the no phase transition to scavenge the structure strain,P2/P'3 electrode can deliver long cycling stability(capacity retention of 73.8%after 1.00 cycles at 1. C)and outstanding rate properties(the discharge capacity of 84.08 mA h g^(-1.at 20 C)than P2/P3 ***,the DFT calculation demonstrates that the introducing novel P'3 phase can significantly regulate the Na^(+)reaction dynamics and modify the local electron configuration of *** effective phase engineering can provide a reference for designing other high-performance electrode materials for Na-ion batteries.

关键词： Sodium ion battery Oxide cathode Phase engineering Phase diagram Na~+kinetic

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FGM-SPCL:Open-Set Recognition Network for Medical Images Based on Fine-Grained Data Mixture and Spatial Position Constraint Loss

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Chinese Journal of Electronics 2024年第4期33卷 1023-1033页

作者： ruru ZHANG Haihong E Lifei YUAN Yanhui WANG Lifei WANG Meina SONG School of Computer Science Beijing University of Posts and Telecommunications Engineering Research Center of Information Networks Ministry of Education Hebei Eye Hospital

The current intelligent auxiliary diagnosis models all follow the closed-set recognition setting. After the model is deployed online, the input data is often not completely controlled. Diagnosing an untrained disease as a known category would lead to serious medical malpractice. Therefore, realizing the open-set recognition is significant to the safe operation of the intelligent auxiliary diagnosis model. Currently, most open-set recognition models are studied for natural images, and it is very challenging to obtain clear and concise decision boundaries between known and unknown classes when applied to fine-grained medical images. We propose an open-set recognition network for medical images based on fine-grained data mixture and spatial position constraint loss(FGM-SPCL) in this *** the fine graininess of medical images and the diversity of unknown samples, we propose a fine-grained data mixture(FGM) method to simulate unknown data by performing a mixing operation on known data to expand the coverage of unknown data difficulty levels. In order to obtain a concise and clear decision boundary, we propose a spatial position constraint loss(SPCL) to control the position distribution of prototypes and samples in the feature space and maximize the distance between known classes and unknown classes. We validate on a private ophthalmic OCT dataset, and extensive experiments and analyses demonstrate that FGM-SPCL outperforms state-of-the-art models.

关键词： Analytical models Fine-grained image recognition Prototypes Aerospace electronics Spatial databases Robustness Data models

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Bcl-xL regulates radiation-induced ferroptosis through chaperone-mediated autophagy of GPX4 in tumor cells

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Radiation Medicine and Protection 2024年第2期5卷 90-99页

作者： Jing Han ruru Wang Bin Chen Feng Xu Liangchen Wei An Xu Lijun Wu Guoping Zhao High Magnetic Field Laboratory Key Laboratory of High Magnetic Field and Ion Beam Physical BiologyChinese Academy of SciencesAnhui Province Key Laboratory of Environmental Toxicology and Pollution Control TechnologyHefei Institutes of Physical ScienceAnhui 230031China University of Science and Technology of China Hefei 230026China School of Public Health Wannan Medical CollegeWuhu 241002China

Objective:To investigate the role and the molecular mechanisms of apoptotic signaling in ferroptosis to regulate tumor ***:Reactive oxygen species(ROS)and lipid peroxide levels were detected in Mouse embryonic fibroblasts(MEFs)with Bcl-xL or Mcl-1.deficiency induced by *** formation,ROS,lipid peroxidation and the transcription/translation levels of PTGS2 were measured in Bcl-xL knockdown tumor cells induced by 5 Gyγ-rays or co-treated with ferrostatin-1.Ferr-1..The protein levels of LPCAT3,ACSL4 and PEBP1.in Bcl-xL knockout MEF cells were evaluated in Bcl-xL knockout MEF cells ***,the interaction of heat shock protein 90(HSP90)with Bcl-xL,GPX4,or LAMP2A was detected by protein mass spectrometry and immunoprecipitation ***:Manipulating Bcl-xL levels facilitated radiation-induced ferroptosis by augmenting the enzymatic oxidation of polyunsaturated fatty acids(PUFAs)and enhancing chaperone-mediated autophagy(CMA)of glutathione peroxidase 4(GPX4)(MEF cell line:t=4.540,P1.A549 cell line:t=56.1.,P1.t=4.885,P1.HCT1.6 cell line:t=1..75,P1.t=7.363,P1..Moreover,depletion of Bcl-xL expedited the CMA process targeting GPX4 by facilitating the association of GPX4 with heat shock protein 90(HSP90)and LAMP2A following radiation *** degradation of GPX4 led to the accumulation of lipid peroxides,ultimately triggering ***:Our study provides initial insights into the regulatory role of Bcl-xL in ferroptosis and underscores the potential of targeting Bcl-xL as a promising therapeutic strategy for cancer by modulating both apoptotic and ferroptotic pathways.

关键词： Bcl-xL Ferroptosis GPX4 Chaperone-mediated autophagy Lipid peroxidation

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“产城创”驱动下城市科创走廊协同发展评估研究——以厦泉科创走廊为例

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China City Planning Review 2024年第1期33卷 34-46页

作者：张若曦罗怡婧张乐敏 Wang ruru Wu Quhang School of Architecture and Civil Engineering Xiamen UniversityXiamenP.R.China

Science and technology innovation corridors are important spatial carriers for the coordinated development of future urban agglomerations in *** on a coupling coordination evaluation method,this study builds an index system for the evaluation of collaborative development of the"industry-city-innovation"region,and conducts the index evaluation and coupling coordination evaluation on the"industry-city-innovation"in the Xiamen-Quanzhou Science and Technology Innovation Corridor,in the hope of exploring measurement and evaluation methods for the de-velopment level of science and technology industrial *** on multidimensional quantitative evaluation,the study concludes that Xiamen and Quanzhou own a solid foundation for economic development and science and technology ***,the difference in the innovation cultivation environment between the two cities is an apparent shortcoming in the construction of the science and technology innovation ***,according to the coupling coordination evaluation of the"industry-city-innovation"system,the result shows that the overall coupling coordination degree of Xiamen City is generally *** various counties and districts along the Xiamen-Quanzhou Science and Technology Inno-vation Corridor are mainly affected by the coupling of"city innovation",forming an obvious spatial agglomeration *** influence of industrial elements is relatively *** the same time,the study uses the gray correlation analysis method to evaluate the factors influencing the coupling co-ordination *** is found that in terms of the degree of influence,city>industry>innovation,and the proportion of age population of labor force,the public service index,and the proportion of added value of the tertiary industry are key ***,considering the collaborative development with"industry-city-innovation"as the driving force,this study puts forward specific policy suggestions for the construction of the Xiamen-Qu

关键词： science and technology innovation corridor collaborative development industry-city-innovation coupling coordination degree Xiamen-Quanzhou

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黄芪源性毛蕊异黄酮与游泳训练协同作用改善AD大鼠的认知功能

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分子植物育种 2024年第16期22卷 5475-5484页

作者：张茹茹新乡医学院三全学院新乡453000

黄芪(Astragalus membranaceus)是一种传统中药材,毛蕊异黄酮(calycosin,CAL)是黄芪中含量丰富的异黄酮类化合物,具有改善记忆障碍的作用。以往研究证实游泳与药物疗法对于AD的治疗更有效,本研究旨在探讨黄芪源性毛蕊异黄酮与游泳训练... 详细信息

黄芪(Astragalus membranaceus)是一种传统中药材,毛蕊异黄酮(calycosin,CAL)是黄芪中含量丰富的异黄酮类化合物,具有改善记忆障碍的作用。以往研究证实游泳与药物疗法对于AD的治疗更有效,本研究旨在探讨黄芪源性毛蕊异黄酮与游泳训练的协同作用,以及其通过激活海马BDNF/TrkB/CREB信号通路改善AD大鼠认知功能的可能性。通过实验研究,我们发现毛蕊异黄酮联合游泳训练能够显著提高AD大鼠海马区BDNF、TrkB和p-CREB蛋白的表达水平,减轻海马损伤和细胞凋亡,降低Aβ1.42和BACE1.表达,减轻氧化应激和炎症状态。这些结果表明,毛蕊异黄酮与游泳训练通过激活BDNF/TrkB/CREB信号通路,协同改善AD大鼠的认知功能,为AD的非药物治疗提供了新的思路。本研究不仅揭示了黄芪源性毛蕊异黄酮与游泳训练的潜在治疗价值,也为未来相关疾病的治疗研究提供了重要的科学依据。

关键词：黄芪(Astragalus membranaceus) 阿尔茨海默病毛蕊异黄酮游泳训练记忆障碍 BDNF/TrkB/CREB通路

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不同形态河谷沉积物中稀土元素的粒径分布特征

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土壤学报 2024年第3期61卷 746-756页

作者：尚月婷张加琼白茹茹西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室陕西杨凌712100 中国科学院水利部水土保持研究所陕西杨凌712100

稀土元素(REE)作为一种重要的土壤侵蚀示踪元素,明确其含量随土壤颗粒粒径的变化特征,对准确量化土壤侵蚀速率具有重要意义。本研究基于Samonova等采样测定的不同粒径范围(<1.1.1.、1.~50、50~250和250~1.000μm)土壤/沉积物颗粒中的RE... 详细信息

稀土元素(REE)作为一种重要的土壤侵蚀示踪元素,明确其含量随土壤颗粒粒径的变化特征,对准确量化土壤侵蚀速率具有重要意义。本研究基于Samonova等采样测定的不同粒径范围(1.1.1.、1.~50、50~250和250~1.000μm)土壤/沉积物颗粒中的REE含量,分析了俄罗斯普罗特瓦河左岸河谷形态(“U”和“V”形谷)、地貌部位(坡面、沟坡/沟壁、沟道底部和洪积扇)、侵蚀(坡面、沟坡/沟壁)和沉积(沟道底部和洪积扇)环境对土壤/沉积物REE含量、富集系数等的影响。结果表明:(1.“U”和“V”形谷四类地貌下,轻稀土(LREE)、重稀土(HREE)和总稀土(ΣREE)含量均随颗粒粒径变粗呈降低趋势。在相同地貌部位,“U”形谷细颗粒(1..6%~24.7%、1..0%~33.5%和1..2%~21.1.。(2)无论河谷形态和地貌部位,LREE和HREE均明显富集在细颗粒中,尤其是“V”形谷,LREE和HREE主要富集在1.μm的颗粒中。(3)对比侵蚀和沉积区,“U”和“V”形谷沉积区细颗粒中LREE和HREE的富集程度均显著(P<0.05)大于侵蚀区。可见,无论河谷形态、地貌部位和侵蚀沉积区,REE均主要富集在细颗粒中;但河谷形态和侵蚀、沉积对REE含量的粒径分布有重要影响。

关键词：侵蚀区域沉积区域地貌部位轻稀土元素重稀土元素富集

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