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Combat data shift in few-shot learning with knowledge graph

Frontiers of Computer Science 2023年第1期17卷 101-111页

作者： Yongchun ZHU Fuzhen zhuang Xiangliang ZHANG zhiyuan QI Zhiping SHI Juan CAO Qing HE Key Lab of Intelligent Information Processing of Chinese Academy of Sciences(CAS) Institute of Computing TechnologyCASBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Institute of Artificial Intelligence Beihang UniversityBeijing 100191China Xiamen Institute of Data Intelligence Xiamen 361021China Computer Science and Engineering University of Notre DameIN 46556USA University of California San Diego La JollaCA 92093USA College of Information Engineering&Academy for Multidisciplinary Studies Capital Normal UniversityBeijing 100089China

Many few-shot learning approaches have been designed under the meta-learning framework, which learns from a variety of learning tasks and generalizes to new tasks. These meta-learning approaches achieve the expected performance in the scenario where all samples are drawn from the same distributions (i.i.d. observations). However, in real-world applications, few-shot learning paradigm often suffers from data shift, i.e., samples in different tasks, even in the same task, could be drawn from various data distributions. Most existing few-shot learning approaches are not designed with the consideration of data shift, and thus show downgraded performance when data distribution shifts. However, it is non-trivial to address the data shift problem in few-shot learning, due to the limited number of labeled samples in each task. Targeting at addressing this problem, we propose a novel metric-based meta-learning framework to extract task-specific representations and task-shared representations with the help of knowledge graph. The data shift within/between tasks can thus be combated by the combination of task-shared and task-specific representations. The proposed model is evaluated on popular benchmarks and two constructed new challenging datasets. The evaluation results demonstrate its remarkable performance.

关键词： few-shot data shift knowledge graph

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矢量网络分析仪的时频域阻抗测量技术

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国外电子测量技术 2017年第8期36卷 38-41,50页

作者：刘丹李树彪庄志远中国电子科技集团公司第四十一研究所青岛266555

由于传输线阻抗不连续性导致的串扰问题会严重影响信号传输的质量,从而导致信号完整性问题。从矢量网络分析仪阻抗测试原理出发,通过对比网络仪开路校准及端口补偿后的Smith圆图测量结果、阻抗和相位格式测量结果,说明网络仪频域3种测... 详细信息

由于传输线阻抗不连续性导致的串扰问题会严重影响信号传输的质量,从而导致信号完整性问题。从矢量网络分析仪阻抗测试原理出发,通过对比网络仪开路校准及端口补偿后的Smith圆图测量结果、阻抗和相位格式测量结果,说明网络仪频域3种测量格式所表述的阻抗信息;利用矢量网络分析仪时域变换功能从时域上对传输线进行评估,可以获得传输线阻抗不连续点和各位置阻抗信息。最后通过对一段3.5mm传输线的测试,说明如何利用矢量网络分析仪的频域和时域同时对传输线特性尤其是阻抗特性进行评估,为传输线测试提供了一种新的方法。

关键词：阻抗时域变换 Smith圆图 Chirp-Z

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Genome-wide identification and analysis of cytokinin dehydrogenase/oxidase(CKX) family genes in Brassica oleracea *** their involvement in response to Plasmodiophora brassicae infections

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Horticultural Plant Journal 2022年第1期8卷 68-80页

作者： Mingzhao Zhu Yong Wang Shujin Lu Limei Yang Mu zhuang Yangyong Zhang Honghao Lv zhiyuan Fang Xilin Hou State Key Laboratory of Crop Genetics and Germplasm Enhancement College of HorticultureNanjing Agricultural UniversityNanjing 210095China Key Laboratory of Biology and Genetic Improvement of Horticultural Crops Ministry of AgricultureInstitute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081China

Cytokinins are a class of phytohormones that promote cell division and differentiation and are thought to affect plant immunity to multiple ***,a comprehensive analysis of cytokinin dehydrogenase/oxidase(CKX)family genes in cabbage has not been *** this study,a total of 36 CKX genes were identified using a genome-wide search *** analysis classified these genes into three *** were distributed unevenly across nine chromosomes in ***,and 15 of them did not contain any *** results of colinearity analysis showed that 36 CKX gene in Arabidopsis was present in several copies in the Brassica oleracea *** analysis of cisacting elements indicated that all genes possessed at least one stress or hormone responsive cis-acting element.A heatmap of CKX gene expression showed the patterns of expression of these genes in various tissues and *** genes(Bol028363,Bol031036 and Bol018140)were relatively highly expressed in all of the investigated tissues under normal conditions,showing the expression profile of housekeeping ***,the expression patterns of CKX genes in Jingfeng 1 and Xiangan 336 were quite different under the same ***,three genes(Bol020547,Bol028392 and Bol045724)were significantly down-regulated and up-regulated in the susceptible and resistant material,respectively,after inoculation,which may indicate their crucial roles in resistance to clubroot *** results provide insights for better understanding the roles of CKX genes in the ***–*** interaction.

关键词： Brassica oleracea Genome-wide Cytokinin dehydrogenase/oxidase(CKX)genes Clubroot

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Associations between cancer family history and esophageal cancer and precancerous lesions in high-risk areas of China

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Chinese Medical Journal 2022年第7期135卷 813-819页

作者： Jiachen Zhou Kexin Sun Shaoming Wang Ru Chen Minjuan Li Jianhua Gu zhiyuan Fan Guihua zhuang Wenqiang Wei Department of Epidemiology and Biostatistics School of Public HealthXl’an Jiaotong University Health Science CenterXi’anShaanxi 710061China National Central Cancer Registry National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China

Background:Family clustering of esophageal cancer(EC)has been found in high-risk areas of ***,the relationships between cancer family history and esophageal cancer and precancerous lesions(ECPL)have not been comprehensively reported in recent *** study aimed to provide evidence for identification of high-risk ***:This study was conducted in five high-risk areas in China from 2017 to 2019,based on the National Cohort of Esophageal *** permanent residents aged 40 to 69 years were examined by endoscopy,and pathological examination was performed for suspicious *** on demographic characteristics,environmental factors,and cancer family history was *** logistic regression was applied to evaluate odds ratios between family history related factors and ***:Among 33,008 participants,6143(18.61%)reported positive family history of *** proportion of positive family history varied significantly among high-risk *** adjusting for risk factors,participants with a family history of positive cancer,gastric and esophageal cancer or EC had 1.49-fold(95%confidence interval[CI]:1.36-1.62),1.52-fold(95%CI:1.38-1.67),or 1.66-fold(95%CI:1.50-1.84)higher risks of ECPL,*** with single or multiple first-degree relatives(FDR)of positive EC history had 1.65-fold(95%CI:1.47-1.84)or 1.93-fold(95%CI:1.46-2.54)higher risks of *** with FDRs who developed EC before 35,45,and 50 years of age had 4.05-fold(95%CI:1.30-12.65),2.11-fold(95%CI:1.37-3.25),and 1.91-fold(95%CI:1.44-2.54)higher risks of ECPL,***:Participants with positive family history of EC had significantly higher risk of *** risk increased with the number of EC positive FDRs and EC family history of early *** genetic risk factors of the population in high-risk areas of China require further *** registration:ChiCTR-EOC-17010553.

关键词： Esophageal cancer Family history High-risk area Cross-sectional study

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春甘蓝新品种‘中甘D22’

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园艺学报 2024年第1期51卷 213-214页

作者：吕红豪张扬勇方智远杨丽梅庄木刘玉梅王勇季家磊李占省韩风庆中国农业科学院蔬菜花卉研究所蔬菜生物育种全国重点实验室北京100081

‘中甘D22’是以细胞质雄性不育系CMS87-534为母本,双单倍体DH系D22为父本配制而成的春甘蓝一代杂种。植株半开展,外叶横椭圆形;叶球圆球形,球色绿,单球质量约1.0 kg;叶球质地松软,口感脆嫩,商品性佳;适应性强,耐未熟抽薹。华北地区春... 详细信息

‘中甘D22’是以细胞质雄性不育系CMS87-534为母本,双单倍体DH系D22为父本配制而成的春甘蓝一代杂种。植株半开展,外叶横椭圆形;叶球圆球形,球色绿,单球质量约1.0 kg;叶球质地松软,口感脆嫩,商品性佳;适应性强,耐未熟抽薹。华北地区春季露地栽培,从定植到收获约60 d,平均产量67.6 t·hm^(-2)。适宜在北京、河北、河南、甘肃、陕西、浙江、辽宁、福建等地区春季露地种植。

关键词：甘蓝单倍体育种分子标记辅助选择一代杂种品种

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秋冬甘蓝新品种‘中甘1388’

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园艺学报 2024年第1期51卷 215-216页

作者：季家磊张扬勇杨丽梅方智远吕红豪庄木王勇刘玉梅李占省韩风庆中国农业科学院蔬菜花卉研究所蔬菜生物育种全国重点实验室北京100081

‘中甘1388’是以细胞质雄性不育系CMS726-3为母本,自交系ML2388-5-3为父本配制的早熟秋冬甘蓝一代杂种,叶球圆球形,球色绿,单球质量约1.0 kg,叶球质地脆嫩,品质好。抗枯萎病,耐未熟抽薹性强。露地栽培从定植到收获约60 d。适宜在河北... 详细信息

‘中甘1388’是以细胞质雄性不育系CMS726-3为母本,自交系ML2388-5-3为父本配制的早熟秋冬甘蓝一代杂种,叶球圆球形,球色绿,单球质量约1.0 kg,叶球质地脆嫩,品质好。抗枯萎病,耐未熟抽薹性强。露地栽培从定植到收获约60 d。适宜在河北、山东、河南、江苏、云南、湖北、福建、浙江、山西、内蒙古和甘肃等适宜地区作秋冬甘蓝种植。

关键词：秋冬甘蓝一代杂种细胞质雄性不育系品种

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秋甘蓝新品种‘中甘596’

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园艺学报 2024年第1期51卷 217-218页

作者：王勇杨丽梅方智远张扬勇季家磊吕红豪庄木刘玉梅李占省韩风庆中国农业科学院蔬菜花卉研究所蔬菜生物育种全国重点实验室北京100081

‘中甘596’是以胞质不育系CMS07-521为母本,自交系09-957为父本配制而成的秋甘蓝一代杂交新品种。叶球圆球形,单球质量约2.0 kg;适应性强,抗枯萎病,耐黑腐病。从定植到收获65~70 d,平均产量约为78.75 t·hm^(-2)。适宜在河北、河南、... 详细信息

‘中甘596’是以胞质不育系CMS07-521为母本,自交系09-957为父本配制而成的秋甘蓝一代杂交新品种。叶球圆球形,单球质量约2.0 kg;适应性强,抗枯萎病,耐黑腐病。从定植到收获65~70 d,平均产量约为78.75 t·hm^(-2)。适宜在河北、河南、山西、陕西、山东、湖北、贵州、广西、内蒙古、辽宁、黑龙江、云南等地区秋季露地种植。

关键词：甘蓝一代杂种抗枯萎病耐黑腐病品种

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Dissection of two QTL clusters underlying yield-related heterosis in the cabbage founder parent 01–20

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Horticultural Plant Journal 2023年第1期9卷 77-88页

作者： Xing Li Honghao Lv Bin Zhang zhiyuan Fang Limei Yang Mu zhuang Yumei Liu Zhansheng Li Yong Wang Yangyong Zhang Key Laboratory of Biology and Genetic Improvement of Horticultural Crops Institute of Vegetables and FlowersChinese Academy of Agricultural SciencesMinistry of Agriculture and Rural AffairsBeijingChina

Cabbage has significant heterosis and most commercial cultivars are *** explore genetic basis of cabbage heterosis and promote cabbage heterosis utilization,we constructed two populations by crossing 100 DH lines derived from a cabbage hybrid 01–20×96–100 with two female *** exhibited different extents of heterosis,the mean value of economic yield was 2.6 times bigger than *** identified 66 and 73 QTLs associated with mid-parent heterosis and transgressive heterosis of twelve yield-related traits,*** QTLs could be detected under the two-year experiment existed in two populations with different testers,showing relatively high phenotypic contribution rate(15.8%–20.0%).Heterosis QTLs exhibited clustered distribution in several cabbage chromosome *** dominant genetic regions,mk300–316 and mk258–268,originated from the elite parent 01–20,exhibited significant genetic effects for yield-related heterosis,which were first *** elite DH lines(D22,D46,D83)harboring these two dominant regions were selected as having strong heterosis in cabbage *** gene analysis revealed that some genes participating in biosynthetic processes of carbohydrates and some responses to auxin might affect cabbage yield *** identification and genetic dissection of yield-related traits provide new insights into the genetic effects of cabbage heterosis.

关键词： Cabbage Yield-related traits Heterosis QTL Genetic analysis New inbred line breeding

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Geometric metasurface for polarization synthesis and multidimensional multiplexing of terahertz converged vortices

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Photonics Research 2022年第6期10卷 1517-1532页

作者： YANG ZHU BINBIN LU zhiyuan FAN FUYONG YUE XIAOFEI ZANG ALEXEI V.BALAKIN ALEXANDER P.SHKURINOV YIMING ZHU SONGLIN zhuang Terahertz Technology Innovation Research Institute Terahertz Spectrum and Imaging Technology Cooperative Innovation CenterShanghai Key Laboratory of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 200092China Department of Physics Lomonosov Moscow State UniversityMoscow 119991Russia

The investigation of converged twisted beams with a helical phase structure has a remarkable impact on both fundamental physics and practical *** metasurfaces consisting of individually orientated metal/dielectric meta-atoms provide an ultracompact platform for generating converged ***,it is still challenging to simultaneously focus left-handed and right-handed circularly polarized incident beams with pure geometric phase modulation,which hinders the independent operation on topological charges between these two helical *** we propose and experimentally demonstrate an approach to design terahertz geometric metasurfaces that can generate helicity-independent converged vortices with homogeneous polarization states by the superposition of two orthogonal helical vortices with identical topological ***,the multiplexing of polarization-rotatable multiple vortices in multiple dimensions,i.e.,in both longitudinal and transverse directions,and a vortex with an extended focal depth is confirmed by embedding polarization modulation into the geometric *** demonstrated approach provides a new way to simultaneously manipulate orthogonal helical components and expand the design dimension,enabling new applications of geometric metasurface devices in polarization optics,twisted-beam related image and edge detection,high capacity optical communication,and quantum information processing,to name a few.

关键词： converge helical twisted

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Defective Ni_(3)S_(2)nanowires as highly active electrocatalysts for ethanol oxidative upgrading

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Nano Research 2022年第4期15卷 2987-2993页

作者： Yufeng Zhang Wei Zhu Jinjie Fang zhiyuan Xu Yanrong Xue Di Liu Rui Sui Qingqing Lv Xuerui Liu Yongsheng Wang Wei Chen Zhongbin zhuang State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

Electrochemical upgrading of biomass ethanol to value-added chemicals is promising for sustainable ***,we synthesize defective Ni_(3)S_(2) nanowires(NWs),which show high activity towards electrochemical oxidation of ethanol to *** Ni_(3)S_(2) NWs are formed by the oriented attachment mechanism,and rich defects are introduced during the growth.A low onset potential of 1.31 V and high mass activity of 8,716 mA·mgNi^(-1) at 1.5 V are achieved using the synthesized Ni_(3)S_(2) NWs toward the ethanol electro-oxidation,which are better than the Ni(OH)2 NWs and the Ni_(3)S_(2) nanoparticles(NPs).And the selectivity for the acetate generation is ca.99%.The high activity of Ni_(3)S_(2) NWs is attributed to the easier oxidation of Ni(II)to the catalytically active Ni(III)species with the promotion from S component and rich *** results demonstrate that the defective NWs can be synthesized by the oriented attachment method and the defective Ni_(3)S_(2) NWs structure as the efficient nonnoble metal electrocatalysts for oxidative upgrading of ethanol.

关键词： nickel sulfide electrocatalyst ethanol oxidation defects oriented attachment

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