检索结果-南通市图书馆

Chinese Chemical Letters 2022年第1期33卷 547-550页

作者： Yifei Yue Shengnan Liu Ning Zhang Zhongmin Su Dongxia Zhu Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province Department of ChemistryNortheast Normal UniversityChangchun 130024China

We develop the effective modification strategy based on molecular engineering of s-triazine and its derivatives to improve the photoelectric performance of all-inorganic perovskites(AIP)for the first *** surface modification strategy with cyanuric acid successfully increases the PLQY of AIP from 40.55%to 88.15%,and significantly enhances the current of the AIP film under 3 V by almost 20-fold(from4.44 m A to 81.20 m A).This work has proven the effectiveness of improving the photoelectric performances of AIP via s-triazine and its derivatives and also suggested the potential risks of reducing the photoelectric performance of AIP due to inappropriate substituents in conjugated organic ligands.

关键词： All-inorganic perovskites Surface modification s-Triazine Substituents Photoelectric performance

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

在线全文

学校读者我要写书评

暂无评论

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 University department of Computer Science and Technology Tsinghua University School of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health Peking University Key Laboratory of Machine Perception (Ministry of Education) Peking University Peking-Tsinghua Center for Life Sciences Peking University IDG/McGovern Institute for Brain Research Peking University State Key Laboratory of Brain and Cognitive Science Institute of Psychology Chinese Academy of Sciences IDG/McGovern Institute for Brain Research Tsinghua University

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

A Stroke-Limitation AMD Control System with Variable Gain and Limited Area for High-Rise Buildings

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

工程与科学中的计算机建模(英文) 2024年第1期138卷 865-884页

作者： Zuo-Hua Li Qing-Gui Wu Jun Teng Chao-Jun Chen School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen518055China department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong Kong100872China

Collisions between a moving mass and an anti-collision device increase structural responses and threaten structural *** active mass damper(AMD)with stroke limitations is often used to avoid ***,a strokelimited AMD control system with a fixed limited area shortens the available AMD stroke and leads to significant control *** solve this problem,the design approach with variable gain and limited area(VGLA)is proposed in this ***,the boundary of variable-limited areas is calculated based on the real-time status of the moving *** variable gain(VG)expression at the variable limited area is deduced by considering the saturation of AMD ***,numerical simulations of a stroke-limited AMD control system with VGLA are conducted on a high-rise building *** numerical simulations show that the proposed approach has superior strokelimitation performance compared with a stroke-limited AMD control system with a fixed limited ***,the proposed approach is validated through experiments on a four-story steel frame.

关键词： High-rise buildings active control stroke limitations variable gain variable limited area

Interpretable machine learning analysis and automated modeling to simulate fluid-particle flows

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2023年第9期80卷 42-52页

作者： Bo Ouyang Litao Zhu Zhenghong Luo department of Chemical Engineering School of Chemistry and Chemical EngineeringState Key Laboratory of Metal Matrix CompositesShanghai Jiao TongUniversityShanghai200240China

The present study extracts human-understandable insights from machine learning(ML)-based mesoscale closure in fluid-particle flows via several novel data-driven analysis approaches,i.e.,maximal information coefficient(MIC),interpretable ML,and automated *** is previously shown that the solidvolume fraction has the greatest effect on the drag *** present study aims to quantitativelyinvestigate the influence of flow properties on mesoscale drag correction(H_(d)).The MIC results showstrong correlations between the features(i.e.,slip velocity(u^(*)_(sy))and particle volume fraction(εs))and thelabel H_(d).The interpretable ML analysis confirms this conclusion,and quantifies the contribution of u^(*)_(sy),εs and gas pressure gradient to the model as 71.9%,27.2%and 0.9%,*** ML without theneed to select the model structure and hyperparameters is used for modeling,improving the predictionaccuracy over our previous model(Zhu et al.,2020;Ouyang,Zhu,Su,&Luo,2021).

关键词： Filtered two-fluid model Fluid-particle flow Mesoscale closure Interpretable machine learning Automated machine learning Maximal information coefficient

Image Hiding with High Robustness Based on Dynamic Region Attention in the Wavelet Domain

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第10期141卷 847-869页

作者： Zengxiang Li Yongchong Wu Alanoud Al Mazroa Donghua Jiang Jianhua Wu Xishun Zhu department of Information Engineering Gongqing CollegeNanchang UniversityJiujiang332020China School of Information Engineering Gongqing Institute of Science and TechnologyJiujiang332020China department of Information Systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia School of Computer Science and Engineering Sun Yat-sen UniversityGuangzhou511400China School of Information Engineering Nanchang UniversityNanchang330031China School of Mathematics and Statistics Hainan Normal UniversityHaikou571158China

Hidden capacity,concealment,security,and robustness are essential indicators of hiding ***,hiding algorithms tend to focus on algorithmic capacity,concealment,and security but often overlook the robustness of the *** practical applications,the container can suffer from damage caused by noise,cropping,and other attacks during transmission,resulting in challenging or even impossible complete recovery of the secret *** image hiding algorithm based on dynamic region attention in the multi-scale wavelet domain is proposed to address this issue and enhance the robustness of hiding *** this proposed algorithm,a secret image of size 256×256 is first decomposed using an eight-level Haar wavelet *** wavelet transform generates one coefficient in the approximation component and twenty-four detail bands,which are then embedded into the carrier image via a hiding *** the recovery process,the container image is divided into four non-overlapping parts,each employed to reconstruct a low-resolution secret *** lowresolution secret images are combined using densemodules to obtain a high-quality secret *** experimental results showed that even under destructive attacks on the container image,the proposed algorithm is successful in recovering a high-quality secret image,indicating that the algorithm exhibits a high degree of robustness against various *** proposed algorithm effectively addresses the robustness issue by incorporating both spatial and channel attention mechanisms in the multi-scale wavelet domain,making it suitable for practical *** conclusion,the image hiding algorithm introduced in this study offers significant improvements in robustness compared to existing *** ability to recover high-quality secret images even in the presence of destructive attacksmakes it an attractive option for various *** research and experimentation can explore the algorith

关键词： Image hiding robustness wavelet transform dynamic region attention

Plastid phylogenomics provides new insights into the systematics,diversification,and biogeography of Cymbidium(Orchidaceae)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plant Diversity 2024年第4期46卷 448-461页

作者： Hai-Yao Chen Zhi-Rong Zhang Xin Yao Ji-Dong Ya Xiao-Hua Jin Lin Wang Lu Lu De-Zhu Li Jun-Bo Yang Wen-Bin Yu Center for Integrative Conservation&Yunnan Key Laboratory for the Conservation of Tropical Rainforests and Asian Elephants Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglaYunnan 666303China University of Chinese Academy of Sciences Huairou DistrictBeijing 101408China Plant Germplasm and Genomics Center Germplasm Bank of Wild SpeciesKunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China State Key Laboratory of Plant Diversity and Specility Crops Institute of BotanyChinese Academy of SciencesHaidian DistrictBeijing 100093China School of Pharmaceutical Sciences Yunnan Key Laboratory of Pharmacology for Natural Productsand Yunnan College of Modern Biomedical IndustryKunming Medical UniversityKunmingYunnan 650500China Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw 05282Myanmar

Cymbidium(Orchidaceae:Epidendroideae),with around 60 species,is widely-distributed across Southeast Asia,providing a nice system for studying the processes that underlie patterns of biodiversity in the ***,phylogenetic relationships of Cymbidium have not been well resolved,hampering investigations of species diversification and the biogeographical history of this *** this study,we construct a plastome phylogeny of 56 Cymbidium species,with four well-resolved major clades,which provides a framework for biogeographical and diversification rate *** dating and biogeographical analyses show that Cymbidium likely originated in the region spanning northern IndoBurma to the eastern Himalayas during the early Miocene(~21.10 Ma).It then rapidly diversified into four major clades in East Asia within approximately a million years during the middle *** *** to the adjacent regions(Borneo,Philippines,and Sulawesi)primarily occurred during the Pliocene-Pleistocene *** analyses indicate that the net diversification rate of Cymbidium has decreased since its origin,and is positively associated with changes in temperature and monsoon *** hydrothermal conditions brought by monsoon intensification in the early Miocene possibly contributed to the initial rapid diversification,after which the net diversification rate was reduced with the cooling climate after the middle *** transition from epiphytic to terrestrial habits may have enabled adaptation to cooler environments and colonization of northern niches,yet without a significant effect on diversification *** study provides new insights into how monsoon activity and temperature changes affected the diversification dynamics of plants in Southeast Asia.

关键词： Cymbidium East Asia Asian monsoons Climate change Biogeographical patterns

Research progress on temperature field evolution of hot reservoirs under low-temperature tailwater reinjection

在线全文

学校读者我要写书评

暂无评论

Journal of Groundwater Science and Engineering 2024年第2期12卷 205-222页

作者： Xin Wang Guo-qiang Zhou Yan-guang Liu Ying-nan Zhang Mei-hua Wei Kai Bian School of Earth science and Engineering Hebei University of EngineeringHandan 056038HebeiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China Technology Innovation Center of Geothermal&Hot Dry Rock Exploration and Development Ministry of Natural ResourcesShijiazhuang 050061China Shanxi Key Laboratory for Exploration and Exploitation of Geothermal Resources Taiyuan 030024China Shanxi Geological Engineering Exploration Institute Taiyuan 030024China

This paper focuses on the study of the evolutionary mechanism governing the temperature field of geothermal reservoir under low-temperature tailwater reinjection conditions,which is crucial for the sustainable geothermal energy *** advancing exploitation of geothermal resources deepens,precise understanding of this mechanism becomes paramount for devising effective reinjection strategies,optimizing reservoir utilization,and bolstering the economic viability of geothermal energy *** article presents a comprehensive review of temperature field evolution across diverse heterogeneous thermal reservoirs under low-temperature tailwater reinjection conditions,and analyzes key factors influ-encing this *** evaluates existing research methods,highlighting their strengths and *** study identifies gaps in the application of rock seepage and heat transfer theories on a large scale,alongside the need for enhanced accuracy in field test results,particularly regarding computational effi-ciency of fractured thermal reservoir models under multi-well reinjection *** address these shortcomings,the study proposes conducting large-scale rock seepage and heat transfer experiments,coupled with multi-tracer techniques for field testing,aimed at optimizing fractured thermal reservoir models'computational efficiency under multi-well reinjection ***,it suggests integrat-ing deep learning methods into research *** initiatives are of significance in deepening the understanding of the evolution process of the temperature field in deep thermal reservoirs and enhancing the sustainability of deep geothermal resource development.

关键词： Geothermal reinjection Seepage heat transfer Tracer test Numerical simulation Thermal breakthrough

The type of lipid supplement has crucial implications for forage particle size in calf starter diets

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2023年第6期14卷 2525-2538页

作者： Pedram Panahiha Hamidreza Mirzaei‑Alamouti Mehdi Kazemi‑Bonchenari Mehdi Poorhamdollah Mina Vazirigohar Jorg R.Aschenbach department of Animal Science University of ZanjanZanjan 45371‑38791Iran. department of Animal Science Faculty of Agriculture and Natural ResourcesArak UniversityArak 38156‑8‑8349Iran. department of Animal Science College of Agriculture and Natural ResourcesUniversity of TehranKaraj 31587‑11167Iran. Zist Dam Group University of Zanjan Incubator CenterZanjan 45371‑38791Iran. Institute of Veterinary Physiology Freie Universitat BerlinOertzenweg 19B14163 BerlinGermany.

Background Forage inclusion in starters of young dairy calves has become an acceptable strategy in the last *** compensate for the lower energy provided by forage,concurrent lipid supplementation can be ***-ever,ruminal microbial activity and forage digestibility may be decreased by lipid *** hypothesized that the composite effect of forage and lipid supplements may be dependent on forage particle size and the type of lipid ***,we evaluated the effect of long(LP;geometric mean,4.97 mm)*** alfalfa hay particle sizes(SP;geometric mean,1.26 mm)with either soybean oil(SBO)or palm fatty acids(PLF)as lipid source in a 2×2 factorial design with treatments SP-SBO,SP-PLF,LP-SBO,and ***(n=13 with 6 males and 7 females each)were offered to Holstein calves(3 days old)with equal amounts of lipid(25 g/kg DM)through-out the experimental *** milk offering scheme(d 1 to 53)was equal for all *** collection continued until 20 d *** Interaction between forage particle size and lipid supplement was significant for the following readouts:the highest and lowest starter intakes during the pre-weaning period occurred in LP-PLF and LP-SBO,*** was associated with similarly contrasting changes in average daily gain(ADG)during the post-weaning period,body weight at the end of experiment,withers height,digestibility of organic matter and neutral detergent fiber,and blood serum concentrations of glucose,beta-hydroxybutyrate,and insulin during the pre-weaning ***-ing both pre-and post-weaning periods,the highest and lowest urinary excretion of allantoin and total purine deriva-tives,representing microbial protein synthesis,were observed in LP-PLF and LP-SBO,respectively,indicating that those diets were most and least favorable for rumen *** of forage particle size,supplemental SBO *** increased serum malondialdehyde as an oxidative stress indicator across p

关键词： Forage particle size Lipid supplement Oxidative stress Ruminal functional development

Structural Feature and Internal Motion of Hyperbranching Cluster System with Low Polydispersity and Featured Pattern in Dilute Solutions

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2022年第12期40卷 1515-1521,I0006页

作者： Si-Qi Huang Mo Zhu Jin-Xian Yang Lian-Wei Li College of chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China department of Chemical Physics University of Science and Technology of ChinaHefei 230026China

This work reports the structural feature and internal motion of one novel hyperbranching cluster system in dilution *** cluster system is composed of HB-PS_(300)-g-Pt BA_(45) hypergraft copolymer chains with uniform subchain,high molar mass and low polydispersity(M_(w)=1.73×106 g/mol and≈1.07),where HB-PS and Pt BA represent hyperbranched polystyrene core and poly(tert-butyl polyacrylate)graft,*** the selective solvent of PS blocks(cyclohexane,T_(θ)=34.5℃),the aggregation kinetics and structural feature are found to be precisely tunable for assembled clusters by the aggregation temperature(11℃

关键词： Hyperbranching cluster Structural feature Internal motion

Allergic Phenotypes and Sarcopenia:Evidence from Observational Studies and Mendelian Randomization Analysis

在线全文

学校读者我要写书评

暂无评论

Phenomics 2024年第1期4卷 46-50页

作者： Zhenwei Tang Guowei Zhou Yi Xiao Hong Liu Xiang Chen Minxue Shen department of Dermatology Xiangya HospitalCentralSouth University110 Xiangya RoadChangsha 410008HunanChina Hunan Key Laboratory of Skin Cancer and Psoriasis HunanEngineering Research Center of Skin Health and DiseaseCentral South UniversityChangsha 410008HunanChina department of Dermatology Second AfliatedHospitalZhejiang University School of MedicineHangzhou 310009ZhejiangChina Furong Laboratory Changsha 410008HunanChina department of Social Medicine and Health Management Xiangya School of Public HealthCentral South UniversityChangsha 410008HunanChina

Commonly afected in early-life population,the impact of allergic phenotypes on mid-or late-life health is less *** study is to explore the association of allergic phenotypes including atopic dermatitis(AD),asthma,eosinophils count(EC),and *** conducted observational studies and mendelian randomization(MR)analysis based on UK Biobank(UKB),the China Health and Retirement Longitudinal Study(CHARLS)and data from genome-wide association study(GWAS).Based on the UKB data,AD,asthma and EC were positively correlated with pre-sarcopenia and decreased skeletal muscle mass index and hand grip in fully adjusted *** and EC were signifcantly associated with sarcopenia while AD was marginally associated(p=0.095).Based on the CHARLS cohort,asthma signifcantly added 109.4%risk for pre-sarcopenia in adjusted model(relative risk=2.094;p=0.002),*** asthma(β=0.100,p=0.006)and EC(β=0.023,p=0.017)exerted signifcantly casual efects on ***,as for sarcopenia,merely EC exhibited a signifcantly casual efect(β=0.005,p=0.048).Signifcant casual efects of AD(β=–0.027,p=0.003),asthma(β=–0.029,p=0.027)and EC(β=–0.041,p<0.001)on decreased appendicular lean mass(ALM)were observed using the inverse-variance weighted method and the Mendelian randomization pleiotropy residual sum and outlier(MR-PRESSO)*** results revealed a contributory role of AD,asthma and EC on sarcopenia,especially in terms of decreased ALM,an indicator for sarcopenia *** fndings of our study will raise the awareness of preventing aging-related disorders or geriatric syndromes among allergic populations.

关键词： Sarcopenia Atopic dermatitis Asthma Aging Eosinophils