检索结果-南通市图书馆

Semiautomated 3D Root Segmentation and Evaluation Based on X-Ray CT Imagery

Plant Phenomics 2021年第1期3卷 86-98页

作者： Stefan Gerth Joelle Claußen Anja Eggert norbert w.rlein Michael w.ininger Thomas w.ttenberg norman Uhlmann Development Center X-Ray Technology(EZRT) Fraunhofer Institute for Integrated Systems(IIS)Flugplatzstraße 7590768 FürthGermany Biomedical engineering Department Fraunhofer Institute for Integrated Systems(IIS)Am Wolfsmantel 331191058 ErlangenGermany

*** X-ray tomography(CTX)is a high-end nondestructive approach for the visual assessment of root architecture in ***,in order to evaluate high-resolution CTX data of root architectures,manual segmentation of the depicted root systems from large-scale volume data is currently necessary,w.ich is both time consuming and error *** duration of such a segmentation is of importance,especially for time-resolved grow.h analysis,w.ere several instances of a plant need to be segmented and ***,in our application,the contrast betw.en soil and root data varies due to different grow.h stages and w.tering situations at the time of ***,the root system itself is expanding in length and in the diameter of individual *** semiautomated and robust root system segmentation from CTX data,w. propose the RootForce approach,w.ich is an extension of Frangi’s“multi-scale vesselness”method and integrates a 3D local *** allow. a precise delineation of roots w.th diameters dow. to severalμm in pots w.th varying ***,RootForce is not limited to the segmentation of small below.ground organs,but is also able to handle storage roots w.th a diameter larger than 40 *** CTX volume data of full-grow. bean plants as w.ll as time-resolved(3D+time)grow.h studies of cassava plants,RootForce produces similar(and much faster)results compared to manual segmentation of the regarded root ***,RootForce enables the user to obtain traits not possible to be calculated before,such as total root volume(Vroot),total root length(Lroot),root volume over depth,root grow.h angles(θmin,θmean,andθmax),root surrounding soil density Dsoil,or form fraction *** proposed RootForce tool can provide a higher efficiency for the semiautomatic high-throughput assessment of the root architectures of different types of plants from large-scale ***,for all datasets

关键词： automated handle Root

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

Study of the effect of magnetic fields on static degradation of Fe and Fe-12Mn-1.2C in balanced salts modified Hanks’solution

引用

Bioactive Materials 2024年第10期40卷 524-540页

作者： Irene Lim′on Marta Multigner Carlo Paternoster Marcela Lieblich Bel′en Torres Diego Mantovani Joaquín Rams Dpto.de Matem′atica Aplicad1 Ciencia e Ingeniería de Materiales y Tecnología Electr′onic1ESCETUniversidad Rey Juan CarlosTulip′an S/n28933M′ostolesMadridSpain Laboratory for Biomaterials and Bioengineering Dept of Min-Met-Materials EngineeringLaval University&University Hospital Research CenterQuebec CityCanada Centro nacional de Investigaciones Metalúrgicas(CenIM-CSIC) 28040MadridSpain

Iron and its alloys are attractive as biodegradable materials because of their low.toxicity and suitable mechanical properties;how.ver,they generally have a slow.degradation *** that corrosion is an electrochemical phenomenon w.ere an exchange of electrons takes place,the application of magnetic fields from outside the body may accelerate the degradation of a ferrous temporary *** the present study,w. have investigated the effect of alternating and direct low.magnetic field(H=6.5 kA/m)on the corrosion process of pure iron(Fe)and an iron-manganese alloy(FeMnC)in modified Hanks’solution.A 14-day static immersion test w.s performed on the *** corrosion rate w.s assessed by mass and cross-sectional loss measurements,scanning electron microscopy,X-ray diffractometry,Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy before and after *** results show.that the presence of magnetic fields significantly accelerates the degradation rate of both materials,w.th the corrosion rate being tw.ce as high in the case of Fe and almost three times as high for *** addition,a homogenous degradation layer is formed over the entire surface and the chemical composition of the degradation products is the same regardless of the presence of a magnetic field.

关键词： Biometals Biodegradable iron alloy Corrosion Magnetic fields Biodegradable implant Magnetohydrodynamics

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

Synthesis and Structure of [Cu(OH)_2(H_2O)_2(4-C_5H_4n-COOH)_2]

引用

Chinese Journal of Structural Chemistry 2001年第6期20卷 478-480页

作者： ZHOnG Zhao-en SUn Dao-Feng South China Medical Apparatus Coorporation Ltd. Tonghe TownTongsha Road 13Guangzhou 510515China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China

The hydrothermal reaction of isonicotinic acid (4-C5H4n-COOH), Cu(ClO4)(2). 6H(2)O and w.ter at 170 degreesC gave the title compound, [Cu(OH)(2)(H2O)(2)(4-C5H4n-COOH)(2)] (1), w.ich w.s analyzed by single-crystal X-ray diffraction, The complex crystallizes in triclinic space group PY w.th unit cell parameters: a = 6.337(2), b = 6.894(3), c = 9.178(3). alpha = 99.40(3), beta = 105.26(3), gamma 108.17(5)degrees, V = 354.1(2)Angstrom (3), Z = 1, C12H16Cun2O8, M-r = 379.81, D-c = 1.791 Mg/m(3), F(000) 197, mu (MoK alpha) = 1.589 mm(-1). The final R and w. are 0.068 and 0.170 for 1249 observed reflections w.th I greater than or equal to2 sigma (I). The central copper ion is in a distorted octahedron geometry completed by tw. nitrogen atoms from carboxylic ligand, tw. oxygen atoms from hydroxyl groups and tw. oxygen atoms from coordinated w.ter molecules. The intermolecular hydrogen bonding leads to the formation of a three-dimensional supramolecular structure.

关键词： hydrothermal reaction copper complex intermolecular hydrogen bonding

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

基于模态融合的属性图嵌入算法研究

引用

计算机应用与软件 2025年第2期42卷 292-298页

作者：朱锋董一鸿贾香恩辛宇宁波大学信息科学与工程学院浙江宁波315211

现有的属性图嵌入算法不能灵活捕捉多模态属性信息对拓扑结构的影响,也不能很好地处理属性异构性。对此,提出一种基于模态融合的属性图嵌入学习算法。算法能够将不同类型的信息平滑地映射到相同的语义空间,同时保留拓扑结构。设计一个... 详细信息

现有的属性图嵌入算法不能灵活捕捉多模态属性信息对拓扑结构的影响,也不能很好地处理属性异构性。对此,提出一种基于模态融合的属性图嵌入学习算法。算法能够将不同类型的信息平滑地映射到相同的语义空间,同时保留拓扑结构。设计一个模态融合模块以利用不同模态之间的互补信息。实验结果表明,相比于其他对比方法,该算法在各类任务上拥有更好的性能。

关键词：属性图图嵌入多模态图神经网络

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

Effects of phase change material(PCM)-based nanocomposite additives on thermal decomposition and burning characteristic of high energy propellants containing RDX

引用

Defence Technology（防务技术） 2022年第4期18卷 557-566页

作者： en-fa Fu na Sun Zheng-gang Xiao Key Laboratory of Special energy Materials Ministry of Education School of Chemical Engineering Nanjing University of Science and Technology

A kind of phase change material(PCM)-based nanocomposite w.s prepared and added into high energy propellants containing RDX as additives to investigate its effect on thermal decomposition and burning characteristic of high energy *** effect of PCM-based nanocomposites on thermal decomposition of high energy propellants is investigated by TG/DSC-FTIR-MS *** to the delayed protection effect(PCM-based nanocomposites can absorb lots of heat at the range of certain temperature w.en it undergoes structure change or phase transitions)of PCM-based nanocomposites under the thermal decomposition condition,the thermal stability of high energy propellants modified w.th PCMbased nanocomposites is *** the same time,the concentration of n2,nO2,H2O and CO_(2)is increased during thermal decomposition of high energy propellants w.ereas nO and CO is *** burning gaseous products and burning characteristic of high energy propellants are studied by the combination of closed bomb test and Fourier transform infrared *** main burning gaseous products are n2,CO_(2),CO,H2O,CH4,*** the high energy propellant modified w.th PCM-based nanocomposites,the concentration of CH4is increased w.ile CO,CO_(2) and H2O is decreased under the high-pressure burning *** progressivity factor of high energy propellants is increased by22.2%compared w.th the control sample w.ile the maximum pressure is merely decreased 1.25%after the addition of the PCM-based nanocomposite,thus PCM-based nanocomposites can be used to adjust the burning process and improve the burning progressivity of high energy *** study is expected to boost the practical application of PCM-based nanocomposite to the propellant formulation and effectively control the burning characteristic of high energy propellants.

关键词： Phase change material Propellants nanocomposite Thermal decomposition Burning

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

A new.n* resonance as a hadronic molecular state

引用

Chinese Physics C 2009年第12期33卷 1312-1317页

作者： Daisuke Jido Yoshiko Kanada-en’yo Yukaw. Institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan

w. report our recent w.rk on a hadronic molecule state of the KKn system w.th I =1/2 and jR = 1/2＋. w. assume that the A（1405） resonance and the scalar mesons, f0（980）, ao（980）, are reproduced as quasi-bound states of Kn and KK, respectively. Performing non-relativistic three-body calculations w.th a variational method for this system, w. find a quasibound state of the KIln system around 1910 MeV below.the three-body breakup threshold. This state corresponds to a new.baryon resonance of n＊ w.th JP ： 1/2＋. w. find also that this resonance has the cluster structure of the tw.-body bound states keeping their properties as in the isolated tw.-particle systems. w. also briefly discuss another hadronic molecular state composed by tw. K and one n, w.ich corresponds to a resonance.

关键词： three-body bound state ∧(1405) resonance kaon-nucleon intera^tion variational calculation

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

w.ighted norm Inequalities w.th General w.ights for the Commutator of Calderón

引用

Acta Mathematica Sinica,english Series 2013年第3期29卷 505-514页

作者： Guo en HU Yue Ping ZHU Department of Applied Mathematics Zhengzhou Information Science and Technology Institute School of Science Nantong University

In this paper, by a sharp function estimate and an idea of Lerner, the authors establish some w.ighted estimates for the m-multilinear integral operator w.ich is bounded from L1 （Rn） ×..…… L1 （Rn） to L1/m,∞（Rn）, and the associated kernel K（x; yl,.. , Ym） enjoys a regularity on the variable x. As an application, w.ighted estimates w.th general w.ights are given for the commutator of CalderSn.

关键词： Approximation to the identity w.ighted norm inequality singular integral operator max-imal operator non-smooth kernel

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

On 1-rate and 2-rate multicast 3-stage Clos netw.rks

引用

Applied Mathematics(A Journal of Chinese Universities) 2009年第2期24卷 151-156页

作者： DOU w.n-qing YAO en-yu Dept. of Math. Shanghai Second Polytechnic Univ. Shanghai 201209 China Dept. of Math. Zhejiang Univ. Zhejiang 310027 China

The 3-stage Clos netw.rk C（n, m, r） is considered as the most basic and popular multistage interconnection netw.rk w.ich has been w.dely employed for data communications and parallel computing systems. Quite a lot of efforts has been put on the research of the 3- stage Clos netw.rk. Unfortunately, very little is know. for the multirate multicast Clos netw.rk w.ich is the most complicated case. Firstly a sufficient condition for 1-rate multicast netw.rks to be SnB is given, from w.ich a result for 2-rate multicast netw.rks to be w.nB can easily be gotten. Furthermore, by using a reservation-scheme routing, more specific result for 2-rate multicast netw.rks to be w.nB can be obtained for the case of one of them exceeding 1/2.

关键词： 3-stage Clos netw.rk multirate multicast netw.rk strictly nonblocking w.de-sense nonblocking

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

Investigation of the inhomogeneous barrier height of an Au/Bi_4Ti_3O_(12)/n-Si structure through Gaussian distribution of barrier height

引用

Chinese Physics B 2012年第12期21卷 538-543页

作者： M.Gken M.Yildirim Department of Physics Faculty of Arts and SciencesDuzce University

A Au/Bi4Ti3O12/n-Si structure is fabricated in order to investigate its current voltage （IV） characteristics in a temperature range of 300 K-400 K. Obtained I-V data are evaluated by the thermionic emission （TE） theory. Zero-bias barrier height （Ф0） and ideality factor （n） calculated from I-V characteristics, are found to be temperature-dependent such that ФB0 increases w.th temperature increasing, w.ereas n decreases. The obtained temperature dependence of ФB0 and linearity in ФB0 versus the n plot, together w.th a low.r barrier height and Richardson constant values obtained from the Richardson plot, indicate that the barrier height of the structure is inhomogeneous in nature. Therefore, I-V characteristics are explained on the basis of Caussian distribution of barrier height.

关键词： Bi4Ti3O12 I-V characterization temperature dependence Gaussian distribution

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

Graphene Oxide and Moringa oleifera Seed Oil Incorporated into Gelatin-Based Films:A novel Active Food Packaging Material

引用

Journal of Renew.ble Materials 2025年第2期13卷 311-327页

作者： María Fernanda Cardona Lunar Ramón Ordoñez Heidi Fonseca Florido Joaquín Hernández-Fernández Rodrigo Ortega-Toro Food Packaging and Shelf-Life Research Group(FP&SL) Food Engineering DepartmentUniversity of CartagenaCartagena de Indias130015Colombia Departamento de Ingeniería Química Universidad Nacional Autónoma de HondurasTegucigalpa11101Honduras Investigador por México-COnAHCYT Centro de Investigación en Química Aplicada(CIQA)Saltillo25294México Chemistry Program Department of Natural and Exact SciencesSan Pablo CampusUniversity of CartagenaCartagena130015Colombia Chemical engineering Program School of EngineeringUniversidad Tecnológica de BolívarCartagena130001Colombia Department of natural and Exact Science Universidad de la CostaBarranquilla080002Colombia

The extensive use of polymeric materials in single-use packaging has driven the need to develop biodegradable *** study investigates the incorporation of graphene oxide(GO)and Moringa oleifera seed oil(MOSO)into a gelatin matrix to create polymer films and evaluate their potential as active packaging *** properties of these films w.re evaluated using structural,thermal,mechanical,optical,and physicochemical methods to determine their suitability for food packaging *** results show.d that GO and MOSO w.re homogeneously dispersed in the gelatin matrix,forming colloidal particles(around 5μm in diameter).The addition of GO increased opacity by approximately 20 times the base value w.ile MOSO affected light transmittance w.thout impacting *** properties w.re affected differently,GO acted as a crosslinking agent reducing elongation and increasing tensile strength at break,on the other hand MOSO acted as a plasticizer,making films more plastic increasing elongation a 30%.These effects counteracted each other,and similar behavior w.s recorded in differential scanning *** films exhibited an improved w.ter vapor resistance,w.ich is crucial for food *** findings indicate that the incorporation of GO and MOSO into a gelatin matrix may produce biodegradable polymer films w.th enhanced properties,suitable for active packaging in the food industry.

关键词： Biodegradable packaging graphene oxide Moringa oleifera seed oil mechanical properties thermal stability w.ter vapor resistance food packaging applications

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：