检索结果-南通市图书馆

Loading-unloading judgement for advanced plastic UH model

Acta Mechanica Sinica 2020年第4期36卷 827-839页

作者： x.feng Y.P.Yao R.N.Li Z.Wan x.Dai College of Airport Civil Aviation University of ChinaTianjin 300300China School of Transportation Science and Engineering Beihang UniversityBeijing 100191China School of Automobile and Transportation Tianjin University of Technology and EducationTianjin 300222China Research Institute of Base and Foundation China Academy of Building ResearchBeijing 100013China

The unified hardening(UH)model proposed by Yao et al.(Geotechnique 2009)is the constitutive model which can consider the influence of the complex stress path and stress history on the deformation and strength of clays ***,the loading-unloading criterion of material model is defined as the change law of the intersection of current yield surface and the p axis,which makes the loading-unloading in the process of hardening and softening can be unified considered in UH ***,the Newton-Raphson method is adopted to attain the nonlinear problems solution in the finite element method of UH model,and the semi-implicit return mapping method is adopted to update *** application of the UH model in the finite element is *** then,the analyses of triaxial test are performed using the unit prediction and finite element *** results of the unit prediction method are compared with the experimental results to illustrate the rationality of the UH *** the results with the unit prediction method and the finite element method,the correctness of the finite element program of the UH model is ***,Ae three-dimensional firdte element andysis of embankment on soft soil is performed by the *** comparison between the results calculated by the UH model and the modified Cam-clay(MCC)model and the experimental data shows that the UH model is rational in analyzing the actual embankment engineering on soft soil.

关键词： Over-consolidated clay Unified hardening model Loading-unloading judgement Finite element method Stress-strain

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

Stretchable and Flexible Ferroelectrics:Fabrication,Characterization and Theory

Stretchable and Flexible Ferroelectrics:Fabrication,Characte...

引用

The 16th Annual Conference of Hong Kong Society of Theoretical and Applied Mechanics 2012、The 1st Mainland-Hong Kong Youth Forum on Mechanics 2012、The 8th Shanghai-Hong Kong Forum on Mechanics and Its Application 2012

作者： x.feng B.W.Lu Y.Wang Department of Engineering Mechanics Tsinghua University Department of Engineering Mechanics Zhejiang University

Lead zirconate titanate(e.g.,PZT) is one of the most widely used ferroelectric materials, due to its excellent piezoelectric and ferroelectric *** classes of sensors,actuators and memory elements,for use in diverse sectors of industry,ranging from aerospace,automotive, to medicine and microelectronics,rely on PZT.A key disadvantage of this material is that it,like most other ceramics,is brittle,and usually fractures at strains that are substantially less than 1%. As a result,devices built with PZT,in conventional layouts and processed using established,high temperature techniques,can only be subjected to small strain deformations,and can be integrated only with narrow classes of *** limitations frustrate many potentially interesting applications,particularly those that require integration with the curvilinear,elastic surfaces of the human body for energy harvesting or health *** report a strategy for integrating nanoribbons of PZT,the ferroelectric ceramics,in 'wavy' geometries,on soft,elastomeric supports to achieve reversible,linear elastic responses to large strain deformations(*** properties),without any loss in ferroelectric or piezoelectric *** Force Microscope(PFM) is used to characterize the piezoelectricity and ferroelectricy of stretchable PZT *** and computational analysis of the mechanics accounts for these characteristics and also shows that the amplitudes of the waves can be continuously tuned with an applied electric field,to achieve a vertical(normal) displacement range that is near one thousand times larger than is possible in conventional planar *** results suggest new design and application possibilities in piezo/ferroelectric devices.

关键词： Stretchable and Flexible Ferroelectrics:Fabrication,Characterization and Theory

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Energy Analysis During the Collision of Two Successive CMEs

Energy Analysis During the Collision of Two Successive CMEs

引用

中国空间科学学会空间物理学专业委员会第十五届全国日地空间物理学研讨会

作者： F.Shen C.L.Shen Yuming Wang x.feng C.Q.xiang SIGMA Weather Group State Key Laboratory of Space WeatherCenter for Space Science and Applied ResearchChinese Academy of Sciences School of Earth & Space Sciences University of Science & Technology of China

Three-dimensional(3D)numerical magnetohydrodynamic(MHD)simulation is carried out for the two successive slow CMEs with initial speeds of40 km/s and10 km/s,in order to study a scenario of the collision process of these two *** on the 3D numerical results,the energies including the kinetic,magnetic,internal and gravitational potential energy are studied in *** analysis during the propagation and interaction of the two CMEs show that we are able to in principle reproduce the super-elastic collision process for this scenario which supports the conclusions made by Shen et al.(Nature:Physics,2012,hereinafter referred to as paper 1)for a comprehensive picture of a unique collision between two CMEs for the 2 November 2008 event observed by STEREO Spacecraft in the heliosphere.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Anti-aging effect riboflavin via endogenous antioxidant in fruit fly drosophila melanogaster

Anti-aging effect riboflavin via endogenous antioxidant in f...

引用

首届东方药理论坛暨2018年全国心脑血管药理学术会议、上海市药理学会第十九届学术年会

作者： Y.-x ZOU M.-H RUAN J.LUAN x.feng S.CHEN Zhi-Yong Chu Naval Medical Research Institute Jiangxi University of Traditional Chinese Medicine

Objectives:This study investigated the effect of riboflavin on aging in Drosophila melanogaster（fruit fly）.Design:Experimental ***:Naval Medical Research ***:Fruit fly Drosophila ***:After lifelong supplement of riboflavin,the lifespan and the reproduction of fruit flies were *** peroxide（H O） was used to mimic oxidative stress damage to fruit flies and the survival time was ***:The activity of copper-zinc-containing superoxide dismutase（SOD1）,manganese containing SOD（SOD2） and catalase（CAT） and lipofuscin（LF） content were ***:Riboflavin significantly prolonged the lifespan（Log rankχ=16.677,Pxidative stress pathway involving enhancing the activity of SOD 1 and CAT and inhibiting LF *** deserves more attention for slowing human aging.

关键词： riboflavin aging lifespan reproduction oxidative stress

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Growth and Structure of Sm on an Ultrathin Al2O3/Ni3Al(111) Film:A Comprehensive Study

Growth and Structure of Sm on an Ultrathin Al2O3/Ni3Al(111) ...

引用

稀土催化在绿色能源和环境保护中的机遇——第十八届全国稀土催化学术会议

作者： Q.xu,~1 S.Hu,~1 x.feng,~1 D.Chen,~1 J.F.Zhu,~(1**) National Synchrotron Radiation Laboratory,University of Science and Technology of China. Hefei 230029,Peoples Republic of China.

The growth and electronic structure of vapor-deposited Sm onto a well-ordered AlO/NiAl(111) ultrathin film under ultrahigh vacuum(UHV) conditions at room-temperature has been studied comprehensively using x-ray photoelectron spectroscopy(xPS),ultraviolet photoelectron spectroscopy(UPS), scanning tunneling microscopy(STM) and low energy electron diffraction(LEED). Our results indicate that at room temperature Sm grows in a layer-by-layer fashion for the first two layers,followed by three-dimensional(3D) *** interaction of Sm with AlO thin films is so strong that deposited Sm is immediately oxidized at *** the oxidation states of Sm and Sm are found at low coverage (xidation of the Sm species where all the Sm species converts to Sm,Further annealing at higher temperatures leads to loss of Sm from the surface via subsurface diffusion.

关键词： Samarium Al2O3/Ni3Al(111) xPS UPS STM LEED

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

STCF conceptual design report (Volume 1): Physics & detector

引用

Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov x.C.Ai L.P.An R.Aliberti Q.An x.Z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.H.Bu F.M.Cai H.Cai J.J.Cao Q.H.Cao x.Cao Z.Cao Q.Chang K.T.Chao D.Y.Chen H.Chen H.x.Chen J.F.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen x.Chen x.F.Chen x.R.Chen Y.Chen Y.Q.Chen H.Y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.Dai L.Y.Dai x.C.Dai D.Dedovich A.Denig I.Denisenko J.M.Dias D.Z.Ding L.Y.Dong W.H.Dong V.Druzhinin D.S.Du Y.J.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang Z.J.Fang G.Fedotovich C.Q.feng x.feng Y.T.feng J.L.Fu J.Gao Y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo J.C.Guo J.Guo Y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han M.Han x.Q.Hao J.B.He S.Q.He x.G.He Y.L.He Z.B.He Z.x.Heng B.L.Hou T.J.Hou Y.R.Hou C.Y.Hu H.M.Hu K.Hu R.J.Hu W.H.Hu x.H.Hu Y.C.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.Y.Huang W.Q.Huang x.T.Huang x.J.Huang Y.B.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia Z.K.Jia H.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao H.J.Jing x.L.Kang x.S.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin Y.Lei E.Levichev C.H.Li C.Li D.Y.Li F.Li G.Li G.Li H.B.Li H.Li H.N.Li H.J.Li H.L.Li J.M.Li J.Li L.Li L.Li L.Y.Li N.Li P.R.Li R.H.Li S.Li T.Li W.J.Li x.Li x.H.Li x.Q.Li x.H.Li Y.Li Y.Y.Li Z.J.Li H.Liang J.H.Liang Y.T.Liang G.R.Liao L.Z.Liao Y.Liao C.x.Lin D.x.Lin x.S.Lin B.J.Liu C.W.Liu D.Liu F.Liu G.M.Liu H.B.Liu J.Liu J.J.Liu J.B.Liu K.Liu K.Y.Liu K.Liu L.Liu Q.Liu S.B.Liu T.Liu x.Liu Y.W.Liu Y.Liu Y.L.Liu Z.Q.Liu Z.Y.Liu Z.W.Liu I.Logashenko Y.Long C.G.Lu J.x.Lu N.Lu Q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.J.Luo T.Luo x.F.Luo Y.H.Luo H.J.Lyu x.R.Lyu J.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde D.Matvienko Z.x.Meng R.Mitchell A.Nefediev Y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova x.Pan Y.Pan E.Passemar Y.P.Pei H.P.Peng L.Peng x.Y.Peng x.J.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian C.F.Qiao J.J.Qin J.J.Qin L.Q.Qin x.S.Qin T.L.Qiu J.Rademacker C.F.Redmer H.Y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of Geosciences Wuhan 430074China China University of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University of Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher School of Economy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STCF project in China is under development with an extensive R&D *** document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

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

定量MRI评估成人踝关节不稳定性剥脱性骨软骨炎(OCD)经微骨折(MF)治疗后软骨修复过程及其与临床疗效的相关性

引用

国际医学放射学杂志 2014年第5期 501-501页

作者： H.Tao x.Shang R.Lu H.Li Y.Hua x.feng 刘丽 Department of Radiology Huashan HospitalFudan University

摘要目的采用 MRI 定量评估踝关节剥脱性骨软骨炎经微骨折(MF)治疗后软骨修复过程,并进一步分析其与临床预后的相关性。方法 48 例病人接受 MRI 检查,包括三维

关键词： MRI 微骨折 OCD 剥脱性骨软骨炎软骨修复临床疗效相关性治疗后 MF

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

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

引用

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： xiao xiang feng Gao Yu-Gui Peng Peng Wu Zong-Lin Li xue-feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

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

Searching for new drugs to treat Alzheimer’s disease dementia through multiple pathways

引用

World Journal of Clinical Cases 2025年第1期13卷 22-28页

作者： Hua Bai xiao-feng feng Department of Neurology The Third Affiliated Hospital of Guizhou Medical UniversityDuyun 558099Guizhou ProvinceChina Department of Neurology Wulong Branch of the People's Hospital Affiliated to Chongqing UniversityWulong 408500ChongqingChina Department of Neurology Guizhou Medical UniversityGuiyang 550004Guizhou ProvinceChina

Dementia is a group of diseases,including Alzheimer's disease(AD),vascular dementia,Lewy body dementia,frontotemporal dementia,Parkinson's disease dementia,metabolic dementia and toxic *** treatment of dementia mainly includes symptomatic treatment by controlling the primary disease and accompanying symptoms,nutritional support therapy for repairing nerve cells,psychological auxiliary treatment,and treatment that improves cognitive function through *** them,drug therapy to improve cognitive function is *** review focuses on introducing and commenting on some recent progress in exploring drugs to improve cognitive function,especially the new progress in drug treatment for *** mainly discuss the opportunities and challenges in finding and developing new therapeutic drugs from the aspects of acetylcholinesterase,N-methyl-D-aspartate glutamate receptor,amyloid protein,tau protein and chronic immune inflammation.

关键词： Alzheimer's disease Dementia Cholinesterase inhibitor Beta amyloid Tau protein

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

Prenatal ultrasonography and genetic analysis of fetal cleidocranial dysplasia:A case report

引用

World Journal of Clinical Cases 2025年第10期13卷 28-34页

作者： feng Wang Pei-feng Dai Wen-Juan Gao Department of Ultrasonography Weifang People’s HospitalWeifang 261000Shandong ProvinceChina

BACKGROUND Cleidocranial dysplasia(CCD)is an infrequent clinical condition with an autosomal dominant inheritance *** is characterized by abnormal clavicles,patent sutures and fontanelles,supernumerary teeth,and short *** 60%-70%of patients with CCD have mutations in the RUNx family transcription factor 2 ***,prenatal diagnosis of CCD is difficult when the family history is *** SUMMARY We report a rare case of fetal CCD with an unknown family history,confirmed by prenatal ultrasonography and genetic testing at a gestational age of 16 *** genetic reports indicated that the fetus carried pathogenic mutations in the RUNx family transcription factor 2 gene(c.674G>A).After careful consideration,the pregnant woman and her family decided to continue the *** Definitive prenatal diagnosis of CCD should include family history,ultrasound diagnosis,and genetic analysis,especially if family history is unknown.

关键词： Cleidocranial dysplasia Genetic analysis Ultrasonic diagnosis Prenatal Case report

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：