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MDCFS: few-shot object detection with multilevel decoupled classifiers

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Optoelectronics Letters 2025年

作者： LI Chuanhui ZHOU Mian FENG Zhikun SUI Zezhou GAO zhan School of Computer Science and Engineering， Tianjin University of Technology

Few-shot object detection poses unique challenges as it requires effectively learning novel classes with limited labeled data. Current approaches often suffer from biases towards base classes during fine-tuning， leading to suboptimal performance on detecting novel classes. Additionally， in complex scenes， the confusion between foreground and background objects further affects the accuracy and robustness of the model. To address these issues， we propose the Multilevel Decoupling Classification Few-Shot Algorithm (MDCFS). we decouple the standard classifier into a parallel foreground classifier and a background classifier in the Few-Shot Object Detection (FSOD) setting. This decoupling enables the independent separation of positive samples from noisy negative samples， alleviating the foreground-background confusion problem commonly encountered in few-shot detectors. For Generalized Few-Shot Object Detection (G-FSOD)， where the few-shot dataset contains base classes， we further decouple the foreground classification head into a base class classification head and a novel class classification head. To ensure balance， we assign more weight to the novel class classification head， effectively addressing the bias towards base classes. Furthermore， we optimize the initial weights of the few-shot fine-tuning stage， significantly reducing training time and mitigating catastrophic forgetting in G-FSOD. Additionally， we incorporate metric learning into our model with minimal cost. Experimental results demonstrate the effectiveness of our approach. Compared to state-of-the-art few-shot object detection methods based on fine-tuning， MDCFS achieves performance improvements of up to 6.3% on the PASCAL VOC dataset and 1.5% on the COCO dataset.

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17世纪法国王朝政府治理贫困

经济社会史评论 2025年第1期 17-29,M0003,M0004页

作者：詹娜华中师范大学历史文化学院武汉430079

17世纪法国农业凋敝、战争频繁,导致贫困人口剧增,流浪人口不断涌入巴黎等地,引发社会混乱,教会主导的慈善机构无法应对庞大的贫困人群。宗教改革后,教会主张采用管理和教育手段引导穷人。为了维持社会稳定,1612年巴黎政府成立皮蒂救济... 详细信息

17世纪法国农业凋敝、战争频繁,导致贫困人口剧增,流浪人口不断涌入巴黎等地,引发社会混乱,教会主导的慈善机构无法应对庞大的贫困人群。宗教改革后,教会主张采用管理和教育手段引导穷人。为了维持社会稳定,1612年巴黎政府成立皮蒂救济院,1656年国王政府建立了总救济院,集中收治贫困人群,强制劳作,在一定程度上缓解了贫困压力,巩固了王权统治。17世纪法国王朝政府治理贫困兼有惩戒和援助性质,极大地影响了此后的法国济贫模式。

关键词： 17世纪法国贫困治理救济院

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基于复数量化理论的本体论承诺研究

科学技术哲学研究 2025年第1期42卷 46-52页

作者：展翼文北京师范大学哲学学院北京100875

蒯因关于本体论承诺的理论范式标志着形而上学在20世纪分析哲学进路中的复兴。文章将首先从元本体论层面对本体论承诺的判定标准的核心理论指向加以梳理,并说明其主要困难。为了克服这些困难,后来的形而上学家在本体论语言中引入各类高... 详细信息

蒯因关于本体论承诺的理论范式标志着形而上学在20世纪分析哲学进路中的复兴。文章将首先从元本体论层面对本体论承诺的判定标准的核心理论指向加以梳理,并说明其主要困难。为了克服这些困难,后来的形而上学家在本体论语言中引入各类高阶对象,但这些尝试存在着无法与本体论承诺的理论问题产生实质对话的风险。文章将探讨一种基于一阶复数量化理论的本体论。与对高阶对象的量化不同,一阶复数量化语言很大程度上延续了一阶单数量化语言能够很好满足本体论承诺标准的优势,同时又能克服后者的局限性。蒯因的本体论的一个关键问题在于无法恰当地刻画个体间的关系。而文章将展示,如果在一阶复数量化语言中引入高层复数构造,我们便可以具象地表达个体间的关系,从而发展一种有结构的群体的本体论。

关键词：本体论承诺复数量化复数逻辑蒯因高层复数

Dendrobium officinale polysaccharide attenuates type 2 diabetes in mice model by modulating gut microbiota and alleviating intestinal mucosal barrier damage

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Food Science and Human Wellness 2025年第1期14卷 112-123页

作者： Xiaoxia Chen chun Chen Changyang Ma Wenyi Kang Junlin Wu Xiong Fu Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety Guangzhou 510640China SCUT-Zhuhai Institute of Modern Industrial Innovation School of Food Science and EngineeringSouth China University of TechnologyGuangzhou 510640China Guangzhou Institute of Modern Industrial Technology Guangzhou 511458China Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health(111 Center) Guangzhou 510640China National R&D Center for Edible Fungus Processing Technology Henan UniversityKaifeng 475004China Guangzhou Wondfo Health Science and Technology Co. Ltd.Guangzhou 510640China

The purpose of this study was to investigate the hypoglycemic effect and mechanism of D endrobium officinale polysaccharide(DOP)on type 2 diabetes mellitus(T2DM)mice established by high-fat diet and *** results showed that DOP improved glycolipid metabolism and serum inflammation levels,and inhibited intestinal-derived lipopolysaccharide(LPS)translocation,suggesting that inhibiting LPS-mediated intestinal barrier damage may be a key target for DOP to alleviate ***,the study found that DOP reduced intestinal inflammation and oxidative stress levels,significantly up-regulated the mRNA expression of tight junction proteins Claudin-1,Occludin and zonula occluden-1(ZO-1),and ameliorated intestinal epithelial *** addition,DOP strongly inhibited the intestinal pathogenic bacteria and LPS-producing bacteria Helicobacter,Enterococcus and Desulfovibrio with a reduction rate of 95%,73% and 9%,respectively,and promoted the proliferation of anti-inflammatory bacteria Bifidobacterium and Lactobacillus by 139% and 8%,*** together,the hypoglycemic effect of DOP was related to the protection of intestinal mucosal barrier,and its underlying mechanism lied in its excellent anti-inflammatory and gut microbiotamodulatory effects,providing a theoretical basis for developing DOP as a novel prebiotic in functional food for diabetes.

关键词： Dendrobium officinale polysaccharide Hypoglycemic Mechanism Lipopolysaccharide Gut microbiota

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First-episode psychiatric disorder risk from SARS-Co V-2 infection:A clinical analysis with Chinese psychiatric inpatients

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Journal of Biomedical Research 2025年第1期39卷 50-60页

作者： Ya Xie Zifeng Xu Yumin zhang Yisheng Li Pengyu Du chun Wang Clinical Mental Health Center the Affiliated Brain Hospital of Nanjing Medical UniversityNanjingJiangsu 210029China Medical School of Nanjing University NanjingJiangsu 210008China

The extensive spread of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)throughout China in late 2022 has underscored the correlation between this virus and severe psychiatric ***,there remains a lack of reported clinical and pathological ***,we retrospectively reviewed the electronic medical records of psychiatric inpatients for seven days from early January ***-one inpatients who developed first-episode psychiatric disorders within two weeks after SARS-CoV-2 infection were recruited,while 24 uninfected first-episode psychiatric inpatients were selected as *** analyses of clinical manifestations,routine laboratory tests,and imaging examinations were *** investigation demonstrated a 330%increase in the incidence of first-episode psychiatric inpatients after SARS-CoV-2 infection in 2023,compared with the preceding year without SARS-CoV-2 *** cases exhibited psychiatric symptoms within one week of SARS-CoV-2 infection,which resolved after approximately two weeks,with no residual symptoms after three ***-way ANOVA demonstrated a significant difference in the highest fever temperature between inpatients with and without psychotic *** inpatients displayed elevated levels of interleukin-4,interleukin-8,and interferon-α,but decreased levels of eosinophils and *** findings suggest that SARS-CoV-2 may contribute to the development of psychiatric disorders,likely mediated by the virus-induced inflammatory response and neuronal dysfunction in the context of psychological distress.

关键词： COVID-19 SARS-CoV-2 psychiatric disorders inflammation interleukins

再经典化如何可能?——数字平台语境下的电影“去经典化”及其迷影修复

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当代电影 2025年第1期 110-117页

作者：战迪潘越深圳大学传播学院/全球传播研究院深圳大学传播学院

数字时代,在平台化传播机制影响下,解构经典、亵玩经典的“去经典化”风潮愈演愈烈,因此,对经典作品进行发掘的“再经典化”实践具有紧迫性和重要性。本文基于数字平台的文化语境,从迷影文化视角切入,反思“去经典化”现象,梳理“再经... 详细信息

数字时代,在平台化传播机制影响下,解构经典、亵玩经典的“去经典化”风潮愈演愈烈,因此,对经典作品进行发掘的“再经典化”实践具有紧迫性和重要性。本文基于数字平台的文化语境,从迷影文化视角切入,反思“去经典化”现象,梳理“再经典化”的建构路径。本文认为,新迷影群体拥有突破技术驯化强大效能,有望在电影“再经典化”实践中充当认识论范畴的稳定器,为共同创造公共价值理想提供重要条件。

关键词：数字平台迷影文化 “去经典化” 再经典化

Study on the current situation and latent profile analysis of nurses’ perceived organizational support

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Chinese Journal of Nursing 2025年第3期60卷 340-347页

作者： Pu, Jiangfeng Wang, Waner Li, Gege Xie, zhanghao Xu, Yixuan zhan, Ningjing Huang, Huigen 广东药科大学护理学院广州市510315 暨南大学护理学院汕头大学医学院南方医科大学附属广东省人民医院/广东省医学科学院医院办公室

Objective To analyze the current situation and latent profiles of nurses’ perceived organizational support，and explore the influencing factors of different types. Methods Through convenience sampling，a total of 1，860 nurses from the Pearl River Delta，Northern Guangdong，Eastern Guangdong and Western Guangdong regions of Guangdong Province were selected for the survey between October and December 2023. The demographic questionnaire，the Perceived Organizational Support Scale，and the Psychological Resilience Scale were used for investigation. The latent profiles of the nurses’ perceived organizational support，the influencing factors of latent profiles were identified by single-factor analysis and multivariate Logistic regression. Results The score of the items of the perceived organizational support in 1，819 nurses is（3.47±0.88） scores. Nurses perceived organizational support is divided into 3 latent classes，namely “poor group”（10.1%），“balanced group”（44.4%），and “rich group”（45.5%）. The influencing factors include recruitment type，hospital level，and psychological resilience（all P<0.05）. Conclusion The perceived organizational support among nurses is moderately high and heterogeneous，which could be divided into 3 latent profiles. Nursing managers should focus on nurses from the poor group and balanced group and intervene with nurses according to the influencing factors of the different latent profiles to improve the level of nurses perceived organizational support. © 2025 Chinese Nursing Journals Publishing House Co.,Ltd. All rights reserved.

关键词： Latent Profile Analysis Nurse Nursing Administration Research Perceived Organizational Support

Isomeric Fluorene-based Heteroundecenes with Different Side Chains Anchoring Positions for Small Molecule Acceptors

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Journal of Wuhan University of Technology(Materials Science) 2022年第1期37卷 136-147页

作者： WANG Wei zhan.chun XIAO Shengqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Two isomeric fluorene-based heteroundecenes of bis(thienocyclopenthieno[3,2-b]thieno)fluorene(BT2T-F)and bis(dithieno[3,2-b:2’,3’-d]thiophene)cyclopentafluorene(B3T-F)have been designed and *** side chains of 4-hexylphenyl anchor on the 5th and 8th positions in B3T-F while on the 4th and 9th positions in BT2T-F,in which the former is closer to the center of the fused *** corresponding acceptor-donor-acceptor(A-D-A)type small molecule acceptors(SMAs)of BT2T-FIC and B3T-FIC were prepared by linking BT2T-F and B3T-F as fused ring donor units with the acceptor unit of 2-(5,6-difluoro-3-oxo-2,3-dihydroinden-1-ylidene)malononitrile(IC-2F),respectively.B3T-FIC presents a superior crystallinity with intense face-on π-π stacking in its neat film while BT2T-FIC is more *** blended with PBDB-T-2Cl as a polymer donor,the optimized PBDB-T-2Cl:BT2T-FIC device exhibits an averaged power conversion efficiency(PCE)of 10.56%while only 7.53%in the PBDB-T-2Cl:B3T-FIC *** improved short-circuit current(J_(sc))and fill factor(FF)of the PBDB-T-2Cl:BT2T-FIC device are the main contribution of its higher performance,which is attributed to its more efficient and balanced charge transport and better carrier recombination *** that BT2T-FIC blend and B3T-FIC blend films both take a preferential face-on orientatedπ-πstacking with comparable distances,the suitable SMA domain size obtained in the BT2T-FIC blend could account for its more efficient photovoltaic *** results highlight the importance of side-chain strategy in developing efficient SMAs with huge fused ring cores.

关键词： polymer solar cells small molecule acceptor side chains morphology

胆固醇喹啉缀合物的合成及其对Zn^(2+)及三价离子的识别性能

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化学研究与应用 2025年第1期37卷 94-101页

作者：展军颜赵杰甘春芳黄燕敏南宁师范大学广西天然高分子化学与物理重点实验室广西南宁530001

设计合成在胆固醇的三位缀合喹啉的分子探针C。通过^(1)H NMR、^(13)C NMR及高分辨质谱对其结构进行了表征,并研究其对金属离子的识别性能。荧光光谱实验发现,在乙醇溶液中,该分子探针C的荧光强度较弱,加入Zn^(2+)后,其在445 nm处的荧... 详细信息

设计合成在胆固醇的三位缀合喹啉的分子探针C。通过^(1)H NMR、^(13)C NMR及高分辨质谱对其结构进行了表征,并研究其对金属离子的识别性能。荧光光谱实验发现,在乙醇溶液中,该分子探针C的荧光强度较弱,加入Zn^(2+)后,其在445 nm处的荧光强度增强6.1倍,而Cd2+仅增强2.8倍。Cr^(3+)、Fe^(3+)、Al^(3+)可以使分子探针C的荧光峰位分别红移52.4 nm、52.2 nm、53.4 nm,并在紫外灯下发射蓝绿色荧光。通过滴定实验可知分子探针C与金属离子在一定浓度范围内存在良好的线性关系,并计算其络合常数。以Zn^(2+)为例,通过Job曲线、参照分子识别性能和核磁滴定实验进一步研究探针C与Zn^(2+)的络合机理。发现探针C与Zn^(2+)1:1络合,探针C通过喹啉氮原子、氧原子、酯基中的羰基与Zn^(2+)配位。该研究丰富了甾体分子对重金属离子识别的研究。

关键词：荧光探针胆固醇重金属离子