检索结果-南通市图书馆

A comparison of statistical learning of naturalistic textures between DCNNs and the human visual hierarchy

Science China(Technological Sciences) 2024年第8期67卷 2310-2318页

作者： LU XinCheng yuan ziqi ZHANG YiChi AI HaiLin CHENG Siyuan GE YiRan FANG Fang CHEN NiHong Department of Psychological and Cognitive Sciences Tsinghua UniversityBeijing 100084China IDG/McGovern Institute for Brain Research Tsinghua UniversityBeijing 100084China Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China School of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health Peking UniversityBeijing 100871China Key Laboratory of Machine Perception(Ministry of Education) Peking UniversityBeijing 100871China Peking-Tsinghua Center for Life Sciences Peking UniversityBeijing 100871China IDG/McGovern Institute for Brain Research Peking UniversityBeijing 100871China State Key Laboratory of Brain and Cognitive Science Institute of PsychologyChinese Academy of SciencesBeijing 100101China

The visual system continuously adapts to the statistical properties of the environment. Existing evidence shows a close resemblance between deep convolutional neural networks(CNNs) and primate visual stream in neural selectivity to naturalistic textures above the primary visual processing stage. This study delves into the mechanisms of perceptual learning in CNNs,focusing on how they assimilate the high-order statistics of natural textures. Our results show that a CNN model achieves a similar performance improvement as humans, as manifested in the learning pattern across different types of high-order image statistics. While L2 was the first stage exhibiting texture selectivity, we found that stages beyond L2 were critically involved in learning. The significant contribution of L4 to learning was manifested both in the modulations of texture-selective responses and in the consequences of training with frozen connection weights. Our findings highlight learning-dependent plasticity in the mid-to-high-level areas of the visual hierarchy. This research introduces an AI-inspired approach for studying learning-induced cortical plasticity, utilizing DCNNs as an experimental framework to formulate testable predictions for empirical brain studies.

关键词： CNN perceptual learning naturalistic texture psychophysics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国传统建筑元素在现代茶室空间设计中的应用研究

引用

鞋类工艺与设计 2024年第5期4卷 142-144页

作者：元子琦黄素涌张倩玉喻俊南马文文西南林业大学云南昆明650224

随着茶文化的传承与发展,在现代茶室空间的营造中对中国传统建筑元素的挖掘和再生利用至关重要。本文首先简述中国传统建筑元素与现代茶室设计,而后着重从传统建筑的纹样、色彩、材料与工艺创新、人文特点、传统空间、应用手法6个方面... 详细信息

随着茶文化的传承与发展,在现代茶室空间的营造中对中国传统建筑元素的挖掘和再生利用至关重要。本文首先简述中国传统建筑元素与现代茶室设计,而后着重从传统建筑的纹样、色彩、材料与工艺创新、人文特点、传统空间、应用手法6个方面分析其在现代茶室空间设计中的应用与传承。现代设计师应合理借助传统建筑设计理念,充分拓展中国传统建筑元素的外延并将其汇入现代茶室空间设计之中。

关键词：中国传统建筑元素茶室空间时代特点室内设计

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comprehensive analyses of the proteome and ubiquitome revealed mechanism of high temperature accelerating petal abscission in tree peony

引用

Horticultural Plant Journal 2024年第1期10卷 205-222页

作者： Chunying Liu ziqi Liu Yanchao yuan Yuxi Zhang Yifu Fang Junqiang Chen Shupeng Gai Key Laboratory of Plant Biotechnology in Shandong Province College of Life SciencesQingdao Agricultural UniversityQingdaoShandong 266109China Shandong Academy of Forestry JinanShandong 250014China

Tree peony(Paeonia suffruticosa Andrews)is a well-known ornamental plant with high economic value,but the short fluorescence is a key obstacle to its ornamental value and industry *** temperature accelerates flower senescence and abscission,but the associated mechanisms are poorly *** this study,the tandem mass tag(TMT)proteome and label-free quantitative ubiquitome from tree peony cut flowers treated with 20℃for 0 h(RT0),20℃or 28℃for 60 h(RT60 or HT60)were examined based on morphological observation,***,6970 proteins and 1545 lysine ubiquitinated(Kub)sites in 844 proteins were *** residues(such as glutamate and aspartate)neighboring the Kub sites were in preference,and 36.01%of the Kub sites were located on the protein *** differentially expressed proteins(DEPs)and Kub-DEPs in HT60 vs RT60 were mainly enriched in ribosomal protein,protein biosynthesis,secondary metabolites biosynthesis,flavonoid metabolism,carbohydrate catabolism,and auxin biosynthesis and signaling revealed by GO and KEGG analysis,accompanying the increase of endogenous abscisic acid(ABA)accumulation and decrease of endogenous indoleacetic acid(IAA)***,the expression patterns of six enzymes(SAMS,ACO,YUC,CHS,ANS and PFK)putatively with Kub modifications were analyzed by proteome and real-time quantitative *** cell-free degradation assays showed PsSAMS and PsACO proteins could be degraded via the 26 S proteasome system in tree peony ***,a working model was proposed for the acceleration of flower senescence and abscission by high *** summary,all results contributed to understanding the mechanism of flower senescence induced by high temperature and prolonging fluorescence in tree peony.

关键词： Tree peony Proteome Ubiquitome High temperature Flower senescence

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Marrying luminescent metal nanoclusters to C_(3)N_(4) for efficient photocatalytic hydrogen peroxide production

引用

Materials Reports(Energy) 2024年第2期4卷 83-89页

作者： Zhen Jiang ziqi Li Qiuxia He Songjie Han Yong Liu Haiguang Zhu Xun yuan College of Materials Science and Engineering Qingdao University of Science and Technology(QUST)53 Zhengzhou Rd.Shibei DistrictQingdao266042PR China

Photocatalytic oxygen(O_(2))reduction has been considered a promising method for hydrogen peroxide(H_(2)O_(2))***,the poor visible light harvesting and low-efficient separation and generation of charge carriers of conventional photocatalysts strongly limited their photocatalytic H_(2)O_(2) generation ***,we design a highly efficient photocatalyst in this work by marrying luminescent gold-silver nanoclusters(AuAg NCs)to polyethyleneimine(PEI)modified C_(3)N_(4)(C3N4-PEI).The key design in this work is the utilization of highly luminescent AuAg NCs as photosensitizers to promote the generation and separation of charge carriers of C_(3)N_(4)-PEI,thereby ultimately producing abundant e−for O_(2) reduction under visible light illumination(λ≥400 nm).As a result,the as-designed photocatalyst(C3N4-PEI-AuAg NCs)exhibits excellent photocatalytic activity with an H_(2)O_(2) production capability of 82μM in pure water,which is 3.5 times higher than pristine C_(3)N_(4)(23μM).This interesting design provides a paradigm in developing other high-efficient photocatalysts for visible-light-driven H_(2)O_(2) production.

关键词： Visible-light-driven oxygen reduction Metal nanoclusters Graphitic carbon nitride Hydrogen peroxide production

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

UltrahighQ Sr_(1+x)Y_(2)O_(4+x)(x=0-0.04)microwave dielectric ceramics for temperature-stable millimeter-wave dielectric resonator antennas

引用

Journal of Advanced Ceramics 2024年第2期13卷 155-165页

作者： Guoqiang He Yu Jiang Kaixin Song Yanjun Liu yuan Nie Wenjie Zhang ziqi Zhao Yinghan He Xinyue Ma Xiuli Chen Xu Li Huanfu Zhou Collaborative Innovation Centre for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi Key Laboratory of Nonferrous Materials and New Processing TechnologyMinistry of EducationSchool of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China College of Electronic Information Hangzhou Dianzi UniversityHangzhou 310018China

Microwave dielectric ceramics should be improved to advance mobile communication technologies *** this study,we prepared Sr_(1+x)Y_(2)O_(4+x)(x=0-0.04)ceramics with nonstoichiometric Sr^(2+)ratios based on our previously reported SrY_(2)O_(4) microwave dielectric ceramic,which has a low dielectric constant and an ultrahigh quality factor(Q value).The ceramic exhibited a 33.6% higher Q-by-frequency(Q×f)value(Q≈12,500)at x=0.02 than SrY_(2)O_(4).All Sr_(1+x)Y_(2)O_(4+x)(x=0-0.04)ceramics exhibited pure phase structures,although variations in crystal-plane spacings were *** ceramics are mainly composed of Sr-O,Y1-O,and Y_(2)-O octahedra,with the temperature coefficient of the resonant frequency(τ_(f))of the ceramic increasing with Y_(2)-O octahedral *** ceramic comprises uniform grains with a homogeneous elemental distribution,clear grain boundaries,and no obvious cavities at x=*** Sr_(1+x)Y_(2)O_(4+x)(x=0-0.04)ceramics exhibited good microwave dielectric properties,with optimal performance observed at x=0.02(dielectric constant(εr)=15.41,Q×f=112,375 GHz,and τ_(f)=-17.44 ppm/℃).The τ_(f) value was reduced to meet the temperaturestability requirements of 5G/6G communication systems by adding CaTiO_(3),with Sr_(1.02)Y_(2)O_(4.02)+2wt% CaTiO_(3) exhibiting ε_(r)=16.14,Q×f=51,004 GHz,andτf=0 ppm/℃.A dielectric resonator antenna prepared using Sr_(1.02)Y_(2)O_(4.02)+2wt%CaTiO_(3) exhibited a central frequency of 26.6 GHz,with a corresponding gain and efficiency of 3.66 dBi and 83.14%,***,Sr_(1.02)Y_(2)O_(4).02-based dielectric resonator antennas are suitable for use in 5G millimeter-wave band(24.5-27.5 GHz)applications.

关键词： millimeter wave microwave dielectric ceramics dielectric resonator antenna nonstoichiometric ratio

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Community structure and carbon metabolism functions of bacterioplankton in the Guangdong coastal zone

引用

Marine Life Science & Technology 2024年第3期6卷 547-561页

作者： ziqi Peng Pandeng Wang Xiaoqing Luo Qiqi Deng Ziwen Yang Jiaxue Wu Wendong Xian Weicong Yan Xiaozhen Mou Yang yuan Wenjun Li Jialing Li State Key Laboratory of Biocontrol Guangdong Provincial Key Laboratory of Plant Stress BiologySchool of Marine SciencesSchool of EcologySchool of Life SciencesSun Yat-Sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Department of Biological Sciences Kent State UniversityKentOH 44242USA Marine Microorganism Ecological&Application Lab Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316000China

Coastal ecosystems are an important region for biogeochemical cycling,are a hotspot of anthropogenic disturbance and play a crucial role in global carbon cycling through the metabolic activities of *** can be broadly classified into two lifestyles:free-living(FL)and particle-attached(PA).However,how coastal bacterioplankton the community structure,co-occurrence networks and carbon metabolic functions with different lifestyles are differentiated is still largely *** these processes is necessary to better determine the contributions of coastal bacterioplankton to carbon ***,the characteristics of community structure and carbon metabolism function of bacterioplankton with two lifestyles in the coastal areas of Guangdong Province were investigated using amplicon sequencing,metagenomic,and metatranscriptomic *** results show that the main bacterioplankton responsible for carbon metabolism were the Pseudomonadota,Bacteroidota,and *** microbial community structure,carbon metabolic function,and environmental preferences differ between different *** and PA bacteria exhibited higher carbon fixation and degradation potentials,respectively.A range of environmental factors,such as dissolved oxygen,pH,and temperature,were associated with the community structure and carbon metabolic functions of the *** activities,such as nutrient discharge,may affect the distribution of functional genes and enhance the carbon degradation functions of *** conclusion,this study increased the understanding of the role of microorganisms in regulating carbon export in coastal ecosystems with intense human activity.

关键词： Particle-attached and free-living bacterioplankton Community structure Carbon metabolism Coastal ecosystem

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The mechanism of Callistephus chinensis flavonoid compounds in the treatment of diabetes using network pharmacology and molecular docking

引用

Journal of Polyphenols 2024年第1期6卷 11-19页

作者： Mingyuan yuan Xiaoli Wang ziqi Sun Xiaoshu Zhang Faculty of Functional Food and Wine Shenyang Pharmaceutical UniversityShenyang 110016China

The purpose of this project is used for exploring the mechanism of Callistephus chinensis in the treatment of diabetes by network pharmacology and molecular docking *** target of Callistephus chinensis was obtained from SwissTargetPrediction database,while the target related to diabetes was obtained from GeneCards and OMIM *** target was added in String database to build the protein interaction *** biological process enrichment analysis and KEGG pathway enrichment analysis were carried out by Metascape software,then the target-pathway network was *** docking was carried out in Discovery Studio 2016 Client software to verify the binding force of Callistephus chinensis flavonoid compounds with key *** this study,10 potential active components were selected from the flavonoid monomer compounds of Callistephus chinensis.1847 biological processes(BP),126 cell compositions(CC)and 256 molecular functions(MF)were obtained by GO enrichment analysis;a total of 194 pathways were involved in KEGG enrichment analysis of 192 cross *** analysis showed that quercetin was the main active component of flavonoids in the treatment of diabetes,AKT1,TNF,VEGFA,EGFR,SRC and other related signals were in relation to the treatment of *** study showed that Callistephus chinensis flavonoid compounds play a role in the treatment of diabetes by regulating multi-target and multi-pathway.

关键词： Callistephus chinensis flavonoid compounds diabetes network pharmacology molecular docking

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

衡水市土壤墒情变化规律研究

引用

衡水学院学报 2023年第1期25卷 6-10页

作者：袁子琦河北省衡水水文勘测研究中心河北衡水053000

选取衡水市2017—2021年15个土壤墒情监测站点的原始资料,结合同期的降水数据,计算5年内土壤含水率的年平均值,发现降水量是影响年际土壤含水率变化的主要因素;计算出5年内相同监测时间的土壤含水率平均值、5年内月平均土壤含水率,发现... 详细信息

选取衡水市2017—2021年15个土壤墒情监测站点的原始资料,结合同期的降水数据,计算5年内土壤含水率的年平均值,发现降水量是影响年际土壤含水率变化的主要因素;计算出5年内相同监测时间的土壤含水率平均值、5年内月平均土壤含水率,发现年内土壤含水率变化与降水量变化基本一致;将衡水市分为东北部、中部、西南部三个区域,计算各区域每个县(市、区)的月平均土壤含水率,并与衡水市多年月平均土壤含水率对比,发现东北部土壤含水率高于西南部,中部土壤含水率居中。分析衡水市土壤墒情变化规律,有利于指导农业生产、合理利用水资源等工作。

关键词：土壤墒情土壤含水率降水量衡水市变化规律

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Controllable transitions among phase-matching conditions in a single nonlinear crystal

引用

Chinese Optics Letters 2024年第2期22卷 141-147页

作者：曾梓琦尤世欣杨子祥袁晨智由成龙金锐博 Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of TechnologyWuhan 430205China Quantum Photonics Laboratory Department of Physics and AstronomyLouisiana State UniversityBaton RougeLouisiana 70803USA

Entangled photon pairs are crucial resources for quantum information processing *** the process of spontaneous parametric downconversion(SPDC),we can generate these photon pairs using bulk nonlinear ***,the crystal is designed to satisfy a specific type of phase-matching ***,we report controllable transitions among different types of phase matching in a single periodically poled potassium titanyl phosphate *** carefully selecting pump conditions,we can satisfy different phase-matching *** allows us to observe first-order Type-II,fifth-order Type-I,third-order Type-0,and fifth-order Type-II *** temperature-dependent spectra of our source were also analyzed in ***,we discussed the possibility of observing more than nine SPDCs in this *** work not only deepens the understanding of the physics behind phase-matching conditions,but also offers the potential for a highly versatile entangled biphoton source for quantum information research.

关键词： spontaneous parametric downconversion nonlinear crystals phase-matching condition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

脂肪因子在运动介导骨免疫调控骨重构进程的机制研究进展

引用

中国体育科技 2019年第3期55卷 59-65,72页

作者：袁子琪李世昌孙朋宗博艺华东师范大学"青少年健康评价与运动干预"教育部重点实验室上海200241 华东师范大学体育与健康学院上海200241

骨重构是一个破骨细胞介导的骨吸收和成骨细胞介导的骨形成相互作用的动态平衡过程,近年来研究发现,由脂肪组织分泌的分泌型卷曲相关蛋白-5、脂联素、瘦素、抵抗素、内脂素等脂肪因子可以通过调节骨免疫系统影响成骨细胞和破骨细胞的分... 详细信息

骨重构是一个破骨细胞介导的骨吸收和成骨细胞介导的骨形成相互作用的动态平衡过程,近年来研究发现,由脂肪组织分泌的分泌型卷曲相关蛋白-5、脂联素、瘦素、抵抗素、内脂素等脂肪因子可以通过调节骨免疫系统影响成骨细胞和破骨细胞的分化和功能,进而影响骨重构。此外,研究表明,运动可以调控脂肪因子的分泌。本研究通过综述相关研究成果,探讨"运动干预-脂肪因子-骨免疫系统-骨重构"通路的相关分子机制和信号通路,为运动调控骨重构以及防治骨相关疾病开辟新的思路,同时探究脂肪因子在肥胖骨质疏松患者中的作用机制,以及脂肪因子在炎症导致骨流失中的作用机制。

关键词：运动骨免疫脂肪因子骨重构

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：