检索结果-南通市图书馆

Deep learning tomographic reconstruction through Hierarchical decomposition of domain transforms

Visual Computing for Industry,Biomedicine,and Art 2022年第1期5卷 365-377页

作者： Lin Fu Bruno De Man GE Research NY 12309 NiskayunaUSA

Deep learning(DL)has shown unprecedented performance for many image analysis and image enhancement tasks.Yet,solving large-scale inverse problems like tomographic reconstruction remains challenging for DL.These problems involve non-local and space-variant integral transforms between the input and output domains,for which no efficient neural network models are readily available.A prior attempt to solve tomographic reconstruction problems with supervised learning relied on a brute-force fully connected network and only allowed reconstruction with a 128^(4)system matrix size.This cannot practically scale to realistic data sizes such as 512^(4)and 512^(6)for three-dimensional datasets.Here we present a novel framework to solve such problems with DL by casting the original problem as a continuum of intermediate representations between the input and output domains.The original problem is broken down into a sequence of simpler transformations that can be well mapped onto an efficient Hierarchical network architecture,with exponentially fewer parameters than a fully connected network would need.We applied the approach to computed tomography(CT)image reconstruction for a 5124 system matrix size.This work introduces a new kind of data-driven DL solver for full-size CT reconstruction without relying on the structure of direct(analytical)or iterative(numerical)inversion techniques.This work presents a feasibility demonstration of full-scale learnt reconstruction,whereas more developments will be needed to demonstrate superiority relative to traditional reconstruction approaches.The proposed approach is also extendable to other imaging problems such as emission and magnetic resonance reconstruction.More broadly,Hierarchical DL opens the door to a new class of solvers for general inverse problems,which could potentially lead to improved signal-to-noise ratio,spatial resolution and computational efficiency in various areas.

关键词： Computed tomography Image reconstruction Deep learning Hierarchical

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

Single-cell RNA sequencing reveals a Hierarchical transcriptional regulatory network of terpenoid biosynthesis in cotton secretory glandular cells

引用

Molecular Plant 2023年第12期16卷 1990-2003页

作者： Jia-Ling Lin Longxian Chen Wen-Kai Wu Xiao-Xiang Guo Cheng-Hui Yu Min Xu Gui-Bin Nie Jun-ling Dun Yan Li Baofu Xu Ling-Jian Wang Xiao-Ya Chen Wei Gao Jin-Quan Huang State Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyUniversity of CASChinese Academy of SciencesShanghai 200032China School of Life Science and Technology ShanghaiTech UniversityShanghai 200031China Chongqing Key Laboratory of Micro-Nano Systems and Intlligent Transduction Collaborative InnovationNational Research Base of Inteligent Manufacturing ServiceChongqing Technology and Business UniversityChongqing 400067China Analytical Applications Center Shimadzu(China)Co.Ltd.Shanghai 200233China Shandong Laboratory of Yantai Drug Discovery Bohai Rim Advanced Research Insttute for Drug DiscoveryYantai 264117ShandongChina State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Shanghai Key Laboratory of Plant Functional Genomics and Resources Shanghai Chenshan Botanical GardenShanghai 201602China National Key Laboratory of Cotton Bio-breeding and Integrated Utilization(Henan University) Henan 475004China

Plants can synthesize a wide range of terpenoids in response to various environmental cues.However,the specific regulatory mechanisms governing terpenoid biosynthesis at the cellular level remain largely elusive.In this study,we employed single-cell RNA sequencing to comprehensively characterize the transcriptome profile of cotton leaves and established a Hierarchical transcriptional network regulating cellspecific terpenoid production.We observed substantial expression levels of genes associated with the biosynthesis of both volatile terpenes(such asβ-caryophyllene andβ-myrcene)and non-volatile gossypol-type terpenoids in secretory glandular cells.Moreover,two novel transcription factors,namely GoHSFA4a and GoNAC42,are identified to function downstream of the Gossypium PIGMENT GLAND FORMATION genes.Both transcription factors could directly regulate the expression of terpenoid biosynthetic genes in secretory glandular cells in response to developmental and environmental stimuli.For convenient retrieval of the single-cell RNA sequencing data generated in this study,we developed a user-friendly web server.Our findings not only offer valuable insights into the precise regulation of terpenoid biosynthesis genes in cotton leaves but also provide potential targets for cotton breeding endeavors.

关键词： Hierarchical network cotton

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

Single-step-etched ultra-compact metamaterial grating coupler enabled by a Hierarchical inverse design approach

引用

Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 119-126页

作者： Qiao Wang Ruiqi Luo Nan Liu Maojing Hou Bo Xiong Guandong Liu Wei Ma Intelligent Network Research Institute Zhejiang LabHangzhou 311100China State Key Laboratory of Modern Optical Instrumentation College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China

With the concept of metamaterials introduced into integrated photonics,subwavelength structures have gained popularity for their ability to create devices with ultra-compact size,high performance,and versatile functionalities.However,traditional metamaterial design methods are usually based on empirical templates and physical approximations,lacking the ability to design free-form metamaterial structures and optimize entire devices globally.In this work,we propose a Hierarchical inverse design approach that combines a conventional effective refractive index based metamaterial structures design with a follow-up global topology optimization.The empirical metamaterial grating coupler design based on effective refractive index engineering faces inaccurate index extraction and insufficient approximation of wavevector matching conditions,which deteriorates coupling efficiency,especially for fully-etched devices with the decreased tapering region.Fortunately,a subsequent overall topology optimization step can well compensate for the negative effect of the shrinking device footprint to increase the efficiency of the metamaterial grating coupler.We demonstrate a 23μm×10μm ultra-compact metamaterial grating coupler with single-stepetched to couple light between a fiber and a 500 nm single-mode silicon waveguide in the O-band.Experimental measurement shows an insertion loss of 3.17 dB and a 3 dB bandwidth of 77 nm,making it the smallest footprint device ever reported.

关键词： waveguide Hierarchical inverse

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

Engineering Hierarchical heterostructure material based on metal-organic frameworks and cotton fiber for high-efficient microwave absorber

引用

Nano Research 2022年第8期15卷 6841-6850页

作者： Yan Guo Hu Liu Dedong Wang Zeinhom M.El-Bahy Jalal T.Althakafy Hala M.Abo-Dief Zhanhu Guo Ben Bin Xu Chuntai Liu Changyu Shen Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Department of Chemistry Faculty of Applied ScienceUmm Al-Qura UniversityMecca 21955Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Integrated Composites Laboratory(ICL) Department of Chemical&Biomolecular EngineeringUniversity of TennesseeKnoxvilleTN 37996USA Department of Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle upon TyneNE18STUK

Rational construction of Hierarchical multi-component materials with abundant heterostructure is evolving as a promising strategy to achieve excellent metal-organic frameworks(MOFs)based electromagnetic wave(EMW)absorbers.Herein,Hierarchical heterostructure WS_(2)/CoS_(2)@carbonized cotton fiber(CCF)was fabricated using the ZIF-67 MOFs nanosheets anchored cotton fiber(ZIF-67@CF)as a precursor through the tungsten etching,sulfurization,and carbonization process.Apart from the synergetic effect of dielectric-magnetic dual-loss mechanism,the Hierarchical heterostructure and multicomponent of WS_(2)/CoS_(2)@CCF also display improved impedance matching.Furthermore,numerous W-S-Co bands and heterojunction interfaces of heterogeneous WS_(2)/CoS_(2)are beneficial to promoting additional interfacial/dipole polarization loss and conductive loss,thereby enhancing the EMW attenuation performance.Based on the percolation theory,a good balance between impedance matching and EMW absorption capacity was achieved for the WS_(2)/CoS_(2)@CCF/paraffin composite with 20 wt.%filler loading,exhibiting strong EMW absorption capability with a minimum reflection loss(RLmin)value of−51.26 dB at 17.36 GHz with 2 mm thickness and a maximum effective absorption bandwidth(EABmax)as wide as 6.72 GHz.Our research will provide new guidance for designing high-efficient MOFs derived EMW absorbers.

关键词： Hierarchical heterostructure sulfurization metal-organic framework microwave absorber

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

Wheat-RegNet:An encyclopedia of common wheat Hierarchical regulatory networks

引用

Molecular Plant 2023年第2期16卷 318-321页

作者： Tengfei Tang Shilong Tian Haoyu Wang Xiaotong Lv Yilin Xie Jinyi Liu Meiyue Wang Fei Zhao Wenli Zhang Hao Li Yijing Zhang State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesCollege of AgricultureHenan UniversityKaifengHenan 457004China National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyShanghai Institutes for Biological SciencesChinese Academy of Sciences300 Fenglin RoadShanghai 200032China University of the Chinese Academy of Sciences Beijing 100049China State Key Laboratory for Crop Genetics and Germplasm Enhancement CICMCPNanjing Agricultural UniversityNo.1 WeigangNanjingJiangsu 210095 China State Key Laboratory of Genetic Engineering Collaborative Innovation Center of Genetics and DevelopmentDepartment of BiochemistryInstitute of Plant BiologySchool of Life SciencesFudan UniversityShanghai 200438China China Center of Industrial Culture Collection(CICC) China National Research Institute of Food and Fermentation IndustriesBeijing 100015China

Dear Editor,Common wheat(Triticum aestivum,2n=6×=42,AABBDD)is the staple crop worldwide.Elucidating the gene regulatory network provides essential information for mechanism studies and targeted manipulation of gene activity for breeding.However,it is a challenging task given the extremely large(16 Gb)and complicated allohexaploid genome of common wheat.Integrating multi-omics data is a compelling approach to construct the Hierarchical regulatory network.

关键词： aestivum Wheat Hierarchical

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

Hierarchical Sponge-Hydrogel Hybrid Structures with Robust Interfaces

引用

Chinese Journal of Chemistry 2023年第20期41卷 2635-2640页

作者： Pei Zhang Guangda Chen Xingmei Chen Junfei Xing Yue Tao Ji Liu Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhenGuangdong518055 China Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems Department of Mechanical and Energy EngineeringSouthern University of Science and TechnologyShenzhenGuangdong518055 China Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities Southern University of Science and TechnologyShenzhenGuangdong518055 China

Soft materials including elastomers and hydrogels are playing critical roles in a variety of fields,including bioelectrodes,batteries,supercapacitors,biomedical scaffolds,and solar vapor absorbents.Integrating hydrophobic sponges(i.e.,mechanical robustness,elasticity and macroscopic porous structure)and hydrophilic hydrogels(i.e.,autonomous water absorption and transportation,biocompatibility)within one unit could readily combine the complementary characters from each component,making a number of future research directions and applications possible.We propose a simple yet effective strategy to construct sponge-hydrogel hybrid structures with robust hydrophobic-hydrophilic interface.The sponge scaffold imparts the sponges-hydrogel hybrids with desirable mechanical robustness,elasticity and macroscopic pores.On the other hand,the incorporated hydrogel component endows the hybrids with high water content(98 wt%hydrogel and 2 wt%sponge),superior compatibility,and nanoscale pores allowing for storage and transportation of various chemical and biological molecules.We further demonstrate that the introduction of hydrophilic hydrogel components could effectively improve the liquid absorption capability,blood coagulation rate,hemostatic capacity and hemocompatibility,thus promising as hemostatic agents.

关键词： Sponge-hydrogel hybrid Interface Hierarchical Robustness Liquid absorption Gels Polymer Composites Materials Science

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

Decision-making and control co-design for multi-agent systems: a Hierarchical design methodology

引用

Control Theory and Technology 2022年第3期20卷 439-441页

作者： Yutao Tang Huashu Qin School of Artificial Intelligence Beijing University of Posts and TelecommunicationsBeijing100876China Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing100190China

Decision-making and control are two of the foremost key ingredients in any autonomous intelligent system.Their codesign has been well-recognized even since the early days of control[1].Recently,motivated by the wide applications of physical networked systems in different areas to cooperatively meet some cybercomputation/communication objectives and constraints,there is an urgent need towards an efficient decision-making and control co-design for these cyber-physical systems.

关键词： agent Hierarchical autonomous

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

用于柔性智能变色玻璃的叶脉状分级银网络透明电极

引用

Science Bulletin 2020年第3期65卷 225-232页

作者：李腾李胜优李戌一许子颉赵继忠史亚婷王亚楠于瑞刘向阳许清池郭文熹 Shenzhen Research Institute of Xiamen University Shenzhen 518057China Research Institute for Soft Matter and Biomimetics Department of PhysicsJiujiang Research InstituteXiamen UniversityXiamen 361005China Department of Physics Faculty of ScienceNational University of SingaporeSingapore 117542Singapore

呈现出可逆颜色变化的智能窗户可调节阳光的透射,节省大量的能耗.目前,在众多智能玻璃中,柔性电致变色器件由于可实现卷对卷生产,良好的控制性以及与其他能源(太阳能电池和锂电池)的兼容性而受到广泛关注.因此,作为柔性电致变色器件不... 详细信息

呈现出可逆颜色变化的智能窗户可调节阳光的透射,节省大量的能耗.目前,在众多智能玻璃中,柔性电致变色器件由于可实现卷对卷生产,良好的控制性以及与其他能源(太阳能电池和锂电池)的兼容性而受到广泛关注.因此,作为柔性电致变色器件不可或缺的部分,柔性透明电极变得越来越重要.本文基于叶脉状的分层金属网络构造了大面积的柔性透明电极,该多级网络由介观尺度的"树干"和微观尺度的"分支"组成.自发形成的"分支"使导电路径均匀分布,而激光蚀刻的"树干"则能够将收集的电子进行远距离传输.该透明电极表现出高的透光率(~81%)和低的电阻(1.36Ωsq–1),并可通过调整网格的宽度、边长和裂纹图案的大小来优化性能.在此基础上,制造了具有显著循环性能的柔性电致变色器件.具有高透明度、导电性和柔韧性的多级银网络透明电极未来将可能在下一代柔性可穿戴光电设备中有广泛的应用前景.

关键词： Flexible transparent conductive electrodes Hierarchical grids Crackle pattern Electrochromic device

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

TiO_(2)bunchy Hierarchical structure with effective enhancement in sodium storage behaviors

引用

Carbon Energy 2022年第4期4卷 645-653页

作者： Shen Liu Kai Niu Shuailin Chen Xin Sun Lehao Liu Bing Jiang Lihua Chu Xiaojun Lv Meicheng Li State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China ElectricPower UniversityBeijingChina

Bronze phase TiO_(2)[TiO_(2)(B)]has great research potential for sodium storage since it has a higher theoretical capacity and ion mobility compared with other phases of TiO_(2).In this case,preparing porous TiO_(2)(B)nanosheets,which can provide abundant sodium insertion channels,is the most effective way to improve transport kinetics.Here,we use the strong one-dimensional TiO_(2)nanowires as the matrix for stringing these nanosheets together through a simple solvothermal method to build a bunchy Hierarchical structure[TiO_(2)(B)-BH],which has fast pseudocapacitance behavior,high structural stability,and effective ion/electron transport.With the superiorities of this structure design,TiO_(2)(B)-BH has a higher capacity(131 vs.70 mAh g^(−1)[TiO_(2)-NWs]at 0.5 C).And it is worth mentioning that the reversible capacity of up to 500 cycles can still be maintained at 85 mAh g^(−1)at a high rate of 10 C.Meanwhile,we also further analyzed the sodium storage mechanism through the ex-situ X-ray powder diffraction test,which proved the high structural stability of TiO_(2)(B)-BH in the process of sodiumization/de-sodiumization.This strategy of uniformly integrating nanosheets into a matrix can also be extended to preparing electrode material structures of other energy devices.

关键词： Hierarchical porous sodium-ion batteries TiO_(2) bronze phase nanosheets

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

Hierarchical Canonical Correlation Analysis Reveals Phenotype,Genotype,and Geoclimate Associations in Plants

引用

Plant Phenomics 2020年第1期2卷 57-72页

作者： Raphael Petegrosso Tianci Song Rui Kuang Department of Computer Science and Engineering University of Minnesota Twin CitiesMinneapolisMNUSA

The local environment of the geographical origin of plants shaped their genetic variations through environmental adaptation.While the characteristics of the local environment correlate with the genotypes and other genomic features of the plants,they can also be indicative of genotype-phenotype associations providing additional information relevant to environmental dependence.In this study,we investigate how the geoclimatic features from the geographical origin of the Arabidopsis thaliana accessions can be integrated with genomic features for phenotype prediction and association analysis using advanced canonical correlation analysis(CCA).In particular,we propose a novel method called Hierarchical canonical correlation analysis(HCCA)to combine mutations,gene expressions,and DNA methylations with geoclimatic features for informative coprojections of the features.HCCA uses a condition number of the cross-covariance between pairs of datasets to infer a Hierarchical structure for applying CCA to combine the data.In the experiments on Arabidopsis thaliana data from 1001 Genomes and 1001 Epigenomes projects and climatic,atmospheric,and soil environmental variables combined by CLIMtools,HCCA provided a joint representation of the genomic data and geoclimate data for better prediction of the special flowering time at 10°C(FT10)of Arabidopsis thaliana.We also extended HCCA with information from a protein-protein interaction(PPI)network to guide the feature learning by imposing network modules onto the genomic features,which are shown to be useful for identifying genes with more coherent functions correlated with the geoclimatic features.The findings in this study suggest that environmental data comprise an important component in plant phenotype analysis.HCCA is a useful data integration technique for phenotype prediction,and a better understanding of the interactions between gene functions and environment as more useful functional information is introduced by coprojections of multiple genomic datasets.

关键词： climatic prediction Hierarchical

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

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：