检索结果-南通市图书馆

A new method to determine the synergistic effects of area ratio and microstructure on the galvanic corrosion of LAS A508/309 L/308 L SS dissimilar metals weld

引用

Journal of Materials Science & Technology 2021年第19期78卷 38-50页

作者： Bright o.okonkwo Hongliang Ming Jianqiu Wang en-Hou Han Ehsan Rahimi Ali Davoodi Saman Hosseinpour CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and engineering University of Science and Technology of ChinaShenyang 110016China Materials and Metallurgical engineering Department Faculty of EngineeringFerdowsi University of MashhadMashhad ***Iran Polytechnic Department of engineering and Architecture University of Udine33100 UdineItaly John A.Paulson School of engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Institute of Particle Technology(LFC) Friedrich-Alexander-Universitdt-Erlangen-Numberg(FAU)91058 ErlangenGermany

The synergistic effects of area ratio and microstructure on the galvanic corrosion of A508/309 L/308 L dissimilar metals weld(DMW)are studied by a multi-analytical *** was demonstrated that decreasing the anode/cathode surface area ratio obviously enhances the corrosion rate of A508,both locally and *** analyses of the AFM results enabled quantitative comparison of the corrosion behaviour of the different surface *** was revealed that in the galvanic interaction of the DMW,the grain refined region corrodes most,followed by the partial grain refined region and base metal matrix of the A508,*** electrochemical localization index(LI)estimation method and AFM analysis both confirmed the presence of a mixed(localized and uniform)corrosion phenomenon occurring on the surface of the A508 anode metal in the galvanic interaction of the dissimilar ***,the degree of synergism equation was utilized to describe the synergistic effects of anode/cathode area ratio and the microstructure of the samples on the galvanic corrosion of LAS A508/309 L/308 L SS DMW.

关键词： Low alloy steel Stainless steel SEM AFM Galvanic corrosion Inclusion

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 Fast Matching Algo.ithm by Trans-Scale Search for Remote Sensing Image

引用

Chinese Journal of Electronics 2015年第3期24卷 654-660页

作者： QI Youjie ZHU en college of Information Science and engineering Southeast University

A new fast matching algo.ithm for remote sensing images is proposed. The algo.ithm adopts a coarse to fine matching process. A remote sensing image is decomposed into multi-scale images which form a wavelet image pyramid by the way of DWT(Discrete wavelet transform).Extract a low frequency sub-image from the wavelet image pyramid to carry out a rough matching operation between the sub-image and target image, and then get a rough po.ition after cluster analysis. Get a suitable po.ition with center at the rough po.ition from remote sensing image to accomplish fine matching operation. The algo.ithm has been analyzed theoretically from the signal processing point of view, and a sufficient condition is given to select wavelet filter. Simulation results testify that proposed algo.ithm not only distinguishes remote sensing images precisely, but also cuts down matching time greatly. It is only 25.04% of SIFT algo.ithm, and 35.36% of SURF algo.ithm for matching time.

关键词： Image matching SIFT DWT Remote sensing

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

combined Use of Differential Scanning Calorimetry and Cross-Sectional Transmission Electron Microscopy for Characterization of Thin-Film Reactions

引用

Chinese Physics Letters 1991年第8期8卷 400-403页

作者： MA en Massachusetts Institute of Technology Cambridge MA 02139 IBM T.J.Watson Reseach Center Yorktown HeightsNY 10598USA The University of Michigan Ann ArborMI 48109-2104USA

We demonstrate that the combined use of differential scanning calorimetry(DSC)and cross-sectional transmission electron microscopy(XTEM)is a powerful technique in the quantitative investigation of the nucleation and growth of metastable and equilibrium phases during thin-film interdiffusion *** Various approaches and advantages of the DSC/XTEM technique in obtaining a variety of kinetic and thermodynamic data are *** reactions,as opposed to conventionally controlled reactions,may occur in thin films where the multilayer geometry is used.

关键词： Electron sectional metastable

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

on-demand Direct Design of Polymeric Thermal Actuator by Machine Learning Algo.ithm

引用

Chinese Journal of Polymer Science 2020年第8期38卷 908-914,I0009页

作者： Bo-en Liu Wei Yu Advanced Rheology Institute Department of Polymer Science and EngineeringState Key Laboratory for Metal Matrix Composite MaterialsShanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China

The design optimization of thermal-driven actuators is a challenging task because the performance depends on multiple materials parameters,structural parameters,and working *** this work,we adopted large scale finite element simulation together with machine learning algo.ithm to fulfill the on-demand design of thermal *** element analysis was used to simulate the performance of thermal actuator with two-layer structure,which generated large amount of dataset by considering the variation of parameters including the moduli,thermal expansion coefficient,sample thickness and length,and *** vector regression(SVR)was adopted to establish the relationship between multiple input parameters and the resulting contact ***,a simple interior point algo.ithm was used to achieve the on-demand design based on the SVR *** contact pressures of thermal actuator constructed from the optimized parameters deviated less than 15%of the target values.

关键词： Polymer compo.ites Thermal actuator Finite element analysis Support vector regression

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

Estimates for the Maximal Bilinear Singular Integral operators

引用

Acta Mathematica Sinica,english Series 2015年第5期31卷 847-862页

作者： Guo en HU Department of Applied Mathematics Zhengzhou Information Science and Technology Institute

In this paper, the behavior on the product of Lebesgue spaces is considered for the maximal operators associated with the bilinear singular integral operators whose kernels satisfy certain minimal regularity conditions.

关键词： Bilinear singular integral operator maximal operator multilinear interpolation Calderon-Zygmund decompo.ition

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

MAo Ze-dong's View on Traditional Chinese Medicine and Its Modern Significance

引用

Chinese Journal of Integrative Medicine 2020年第6期26卷 469-472页

作者： LI en-chang Wenzhou Medical University WenzhouZhejiang Province(325035)China

MAo Ze-dong's view on traditional Chinese medicine(TCM)can be divided into the scientific view on TCM,the development view on TCM and the future view on *** core of MAo Ze-dong's view on TCM lies in its scientific *** basic content of MAo Ze-dong's development view on TCM includes unity of TCM and Western medicine(WM),advocating the multi-angle development of TCM from the height of Chinese national dignity,independence and *** Ze-dong's future view on TCM is targeted at WM learning from TCM,integrating TCM and WM and establishing new Chinese *** contemporary enlightenment of MAo Ze-dong's view on TCM is to start from reforming the medical education system before establishing new Chinese medicine.

关键词： MAo Ze-dong view on traditional Chinese medicine(TCM) scientific view on TCM development view on TCM future view on TCM Western medicine learning from TCM

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

So.itary Excitations of Dipolar Bosons in optical Lattice under Magnetic Fields

引用

communications in Theoretical Physics 2006年第2X期46卷 233-238页

作者： WANG Shi-en Department of Physics Honghe University Mengzi 661100 China Department of Materials Tsinghua University Beijing 100084 China Department of Physics Wenshang Normal Academy Wenshaag 663000 China Department of Physics Beijing Normal University Beijing 100875 China

We obtain the multiso.itary solutions of the extended Bose-Hubbard model which describes dipolar Bose- Einstein condensates in optical lattices under time-dependent magnetic fields, and indicate that the nonlinearity is due to both on-site short-range interactions and also （long-range） dipole-dipole interactions which can act between neighboring sites. The discrete breathers as nonlinear excitations are always oscillatory in time and can also be spatially localized, while the oscillatory frequencies are determined by an external field. We show that these excitations will be observable and discuss how the parameters can be tuned in future experiments.

关键词： so.itary excitation extended Bose-Hubbard model bosons optical lattice

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 the Variation of a Metric and Its Application

引用

Acta Mathematica Sinica,english Series 2010年第10期26卷 2003-2014页

作者： Fa en WU Department of Mathematics School of Science Beijing Jiaotong University Beijing 100044 P. R. China

Some of the variation formulas of a metric were derived in the literatures by using the local coordinates system, In this paper, We give the first and the second variation formulas of the Riemannian curvature tensor, Ricci curvature tensor and scalar curvature of a metric by using the moving frame method. We establish a relation between the variation of the volume of a metric and that of a submanifold. We find that the latter is a consequence of the former. Finally we give an application of these formulas to the variations of heat invariants. We prove that a conformally flat metric g is a critical point of the third heat invariant functional for a compact 4-dimensional manifold M, then （M, g） is either scalar flat or a space form.

关键词： Riemannian functional variation of a metric volume variation space form heat invariant

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 Heat Treatment and Thermal Cycling on Martensitic Transformation Behavior of Ni_(59)Al_(11)Mn_(30) High Temperature Shape Memory Alloy

引用

材料热处理学报 2004年第5期25卷 147-151页

作者： HeZhi-rong ZhouJing-en ShaanxiUniversityofTechnology Hanzhong723003China Xi＇anJiaotongUniversity Xi＇an710049China

A reversible martensitic transformation (MT) takes place during cooling and heating in the solution quenched and the solution quenched plus aged Ni59AlHMn30 alloy The MT temperature increases with increasing solution temperature. The excellent MT characteristics can be obtained from a process of looCTC solution quenched plus 400 °C aged. Follow this process, the MT start temperature (Ms) and the reverse MT finish temperature (Af) are 469*C and 548"C, respectively. The martensitic stabilization effect in the solution quenched and aged Ni59AlnMn3o alloy is observed as an increase in the Af temperature of the first reverse MT during thermal cycles. This stabilization effect vanishes from the second thermal cycle. Thermal cycling can enhance the stability of the reversible MT. The microstructure of the quenched NisgAlnMnjo alloy consists of martensite (M) and gamma phase. The volume fraction of gamma phase is about 40%. The substructure of M and gamma phase is twins and dislocations, respectively. The hardness of M is higher than that of gamma phase. After aging treatment the basic phases of alloy do not change, but the hardness of the phases increases.

关键词：热处理马氏体转变形状记忆合金热循环 Ni59Al11Mn30

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 Unified and Explicit construction of N-So.iton Solutions for the Nonlinear Schrfdinger Equation

引用

communications in Theoretical Physics 2001年第10期36卷 401-404页

作者： FAN en-Gui Institute of Mathematics Fudan University Shanghai 200433 China

An explicit N-fold Darboux transformation with multiparameters for nonlinear Schrodinger equation is constructed with the help of its Lax pairs and a reduction technique. According to this Darboux transformation, the solutions of the nonlinear Schrfdinger equation are reduced to solving a linear algebraic system, from which a unified and explicit formulation of N-so.iton solutions with multiparameters for the nonlinear Schrfdinger equation is given.

关键词： Schrodinger equation, N-fold Darboux transformation, N-so.iton solutions

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：