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Region-adaptive Concept Aggregation for Few-shot Visual Recognition

Machine Intelligence Research 2023年第4期20卷 554-568页

作者： Mengya Han Yibing Zhan baosheng yu Yong Luo Han Hu Bo Du Yonggang Wen Dacheng Tao School of Computer Science National Engineering Research Center for Multimedia SoftwareWuhan UniversityWuhan430072China Hubei Luojia Laboratory Wuhan430072China School of Computer Science The University of SydneySydney2006Australia JD Explore Academy Beijing101116China School of Information and Electronics Beijing Institute of TechnologyBeijing100081China School of Computer Science and Engineering Nanyang Technological UniversitySingapore639798Singapore

Few-shot learning (FSL) aims to learn novel concepts from very limited examples. However, most FSL methods suffer from the issue of lacking robustness in concept learning. Specifically, existing FSL methods usually ignore the diversity of region contents that may contain concept-irrelevant information such as the background, which would introduce bias/noise and degrade the performance of conceptual representation learning. To address the above-mentioned issue, we propose a novel metric-based FSL method termed region-adaptive concept aggregation network or RCA-Net. Specifically, we devise a region-adaptive concept aggregator (RCA) to model the relationships of different regions and capture the conceptual information in different regions, which are then integrated in a weighted average manner to obtain the conceptual representation. Consequently, robust concept learning can be achieved by focusing more on the concept-relevant information and less on the conceptual-irrelevant information. We perform extensive experiments on three popular visual recognition benchmarks to demonstrate the superiority of RCA-Net for robust few-shot learning. In particular, on the Caltech-UCSD Birds-200-2011 (CUB200) dataset, the proposed RCA-Net significantly improves 1-shot accuracy from 74.76% to 78.03% and 5-shot accuracy from 86.84% to 89.83% compared with the most competitive counterpart.

关键词： Few-shot learning metric-based meta learning concept learning region-adaptive concept-aggregation

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安徽口岸鼠形动物携带巴尔通体的调查

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中国国境卫生检疫杂志 2024年第1期47卷 38-40页

作者：许佳唐海涛俞保圣王赛寒郑迅郭惠琳安徽国际旅行卫生保健中心(合肥海关口岸门诊部) 安徽合肥230000 合肥海关中国海关科学技术研究中心

目的掌握安徽口岸鼠形动物自然感染巴尔通体的情况。方法2019—2021年在安徽7个口岸范围内用鼠夹、鼠笼捕鼠,从鼠脾中提取DNA,用PCR方法扩增巴尔通体gltA基因。将阳性PCR产物测序,用Mega11软件对序列进行比对分析。结果在安徽7个口岸捕... 详细信息

目的掌握安徽口岸鼠形动物自然感染巴尔通体的情况。方法2019—2021年在安徽7个口岸范围内用鼠夹、鼠笼捕鼠,从鼠脾中提取DNA,用PCR方法扩增巴尔通体gltA基因。将阳性PCR产物测序,用Mega11软件对序列进行比对分析。结果在安徽7个口岸捕获黑线姬鼠、黄胸鼠、褐家鼠、小家鼠、大足鼠、社鼠和大麝鼩24只,其中黑线姬鼠数量最多,占29.17%。从3只黑线姬鼠中检出巴尔通体核酸,检出率12.50%;其他鼠种均未检出。测序结果显示样本BT438和BT453与未定种的巴尔通体为同一分支,样本BT473与抚远巴尔通体为同一分支。结论安徽口岸地区鼠形动物存在巴尔通体自然感染,且巴尔通体种类多样,应加强口岸鼠类、鼠体表寄生虫等携带病原体的监测。

关键词：鼠形动物巴尔通体病原体口岸

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Recent Evaluation of Some Dosimetry Data for Reactor Application

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中国核科技报告 1997年第S3期 87-93页

作者： yu baosheng (Chinese Nuclear Data Center, CIAE)

Knowledge of dosimetry data is very useful in reactor research and application. For reactor dosimetry, radiation safety, environmental and material damage in fission and fusion engineering, more accurate data are required and it is necessary to identify and correct several differences and discrepancies in the existing dosimetry cross sections from different laboratories. The evaluated dosimetry data are recommended in this work on the basis of the recent experimental data, especially the new measured results at CIAE, and compared with other evaluated data.

关键词： data ENDF

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Evaluation of Activation Cross Sections for (n,2n) Reactions on Some Nuclei

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中国核科技报告 1995年第S1期 64-71页

作者： yu baosheng ( China Nuclear Data Center, CIEA )

The evaluations of activation cross sections of (n,2n) reaction forNi,Rb,Y,Zr,Ce andTm were performed in order to update the previous evaluated data. The cross sections are recommended based on the recent experimental data, especially the new measured results in CIAE. The present evaluated data are compared with other evaluated data.

关键词： ENDF Reactions on Some Nuclei n,2n Evaluation of Activation Cross Sections for

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Evaluation of Neutron Induced Helium Production and Activation Cross Sections for Some Nuclei

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中国核科技报告 1997年第S2期 72-78页

作者： yu baosheng (China Nuclear Data Center, CIAE)

The activation characters of chosen fusion materials are important in determining proper reactor technologies. In order to meet these requirements for fusion design studies, not only all activation cross sections for the fusion materials themselves have to be know, but also those for all possible impurities require to be considered if they lead to long-lived activities.

关键词： VI Cr Evaluation of Neutron Induced Helium Production and Activation Cross Sections for Some Nuclei data ENDF

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Evaluation of Neutron Activation Cross Sections for 93Nb（n,2n）92mNb and 93Nb（n,n′）93mNb Reactions from Threshold to 20 MeV

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中国核科技报告 1995年第S1期 51-58页

作者： yu baosheng (China Nuclear Data Center, CIAE)

Niobium is a very important structure material in nuclear fusion engineering. The activation cross sections of neutron interaction with93Nb must be considered for the evaluation of radiation safety, radiation induced material damage. Meanwhile, knowledge of the neutron（n,2n） and （n,n'） reactions have been used for the neutron dosimetry. The dosimetry reaction of93Nb（n,n'）93mNb is characterized by the low threshold energy less than 0.1

关键词： Nb Reactions from Threshold to 20 MeV Nb and n,2n n,n Evaluation of Neutron Activation Cross Sections for Nb

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Neutron Spherical Optical Potential Parameters for 238～242Pu below 20 MeV

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中国核科技报告 1998年第S4期 63-70页

作者： Wang Shunuan yu baosheng (China Institute of Atomic Energy, CIAE)

A set of neutron spherical optical potential parameters for238～242pu below 20 MeV is obtained by using the auto-searching optimum optical potential parameters code APFO96 based on latest available experimental data of total cross sections σ_t, nonelastic cross sections σnonelastic differential cross sections σel（θ）, and systematics. The calculated results of σ_t, σnon, σel（θ） for238～242pu are compared with available experimental data, CENDL-2 and other evaluated data files. Theoretical calculations and experimental data are in agreement fairly good. The set of neutron spherical optical potential parameters for238～242pu below 20 MeV are recommended for CENDL-3 actinides nuclei FUNF preequilibrium and equilibrium statistical calculations and evaluations.

关键词： Neutron Spherical Optical Potential Parameters for Pu below 20 MeV ENDF APFO data

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Calculation of Cross Sections for n+63Cu Reaction

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中国核科技报告 1998年第S2期 57-65页

作者： Han Yinlu yu baosheng (China Nuclear Data Center, CIAE)

Based on the relevant experimental data, and optical model, evaporation model, Jπ-dependent exciton model, and the pick-up mechanism of cluster pre-formation, neutron induced reaction cross sections, the energy spectrum, angular distribution, double differential cross section and γ-production data were calculated forCu at incident neutron energies below 20 MeV. The calculated results were compared with experimental data.

关键词： Cu Reaction Calculation of Cross Sections for n

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EVALUATION OF NEUTRON NUCLEAR DATA FOR ~7Li

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中国核科技报告 1993年第S3期 50-59页

作者： yu baosheng Cai Dunjiu(CHINESE NUCLEAR DATA CENTER, IAE )

New complete neutron data for ~7Li have been evaluated for *** our work in 1978 for CENDL-1 to extend incident neutron energyrange from 10eV to 20 *** new experimental data andbenchmark testing,the tritium production ... 详细信息

关键词： Li EVALUATION OF NEUTRON NUCLEAR DATA FOR

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Theoretical Calculation of n+59Co Reaction in Energy Region up to 100 MeV

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中国核科技报告 1996年第S3期 18-24页

作者： Shen Qingbiao yu baosheng Cai Dunjiu (China Nuclear Data Center, CIAE)

A set of neutron optical potential parameters forCo in energy region of 2～100 MeV was obtained based on concerned experimental data. Various cross sections of n+Co reactions were calculated and predicted. The calculated results show that the activation productsCo,Fe, andMn are main neutron monitor reaction products for n+Co reaction in energy range up to 100 *** production reaction can be a promising neutron monitor reaction in the energy region from 30 to 100 MeV.

关键词： Co Reaction in Energy Region up to 100 MeV Theoretical Calculation of n

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