检索结果-南通市图书馆

An advanced higher-order theory for laminated composite plates with general lamination angles

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2011年第5期27卷 720-729页

作者： Zhen wu hong zhu Wan-Ji Chen Key Laboratory of Liaoning Province forComposite Structural Analysis of Aerocraft and Simulation Shenyang Aerospace University 110136 Shenyang China

This paper proposes a higher-order shear deformation theory to predict the bending response of the laminated composite and sandwich plates with general lamination *** proposed theory a priori satisfies the continuity conditions of transverse shear stresses at ***,the number of unknown variables is independent of the number of *** first derivatives of transverse displacements have been taken out from the inplane displacement fields,so that the C 0 shape functions are only required during its finite element *** to C 0 continuity requirements,the proposed model can be conveniently extended for implementation in commercial finite element *** verify the proposed theory,the fournode C 0 quadrilateral element is employed for the interpolation of all the displacement parameters defined at each nodal point on the composite *** results show that following the proposed theory,simple C 0 finite elements could accurately predict the interlaminar stresses of laminated composite and sandwich plates directly from a constitutive equation,which has caused difficulty for the other global higher order theories.

关键词： Laminated and sandwich composites Higherorder theory C 0 continuity requirement Transverse shear stress

Dip-coating processed sponge-based electrodes for stretchable Zn-MnO2 batteries

在线全文

学校读者我要写书评

暂无评论

Nano Research 2018年第3期11卷 1554-1562页

作者： hong-wu zhu Jin Ge Yu-Can Peng Hao-Yu Zhao Lu-An Shi Shu-hong Yu Division of Nanomaterials & Chemistry Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry CAS Centre for Excellence in Nanoscience Hefei Science Centre of CAS University of Science and Technology of China Hefei 230026 China

Stretchable electronics are in high demand for next-generation wearable devices, but their fabrication is still challenging. Stretchable conductors, flexible pressure sensors, and foldable light-emitting diodes （LEDs） have been reported; however, the fabrication of stable stretchable batteries, as power suppliers for wearable devices, is significantly behind the development of other stretchable electronics. Several stretchable lithium-ion batteries and primary batteries have been fabricated, but their low capacities and complicated manufacturing processes are obstacles for practical applications. Herein, we report a stretchable zinc/manganese-oxide （Zn-MnO2） full battery based on a silver-nanowire- coated sponge prepared via a facile dip-coating process. The spongy electrode, with a three-dimensional （3D） binary network structure, provided not only high conductivity and stretchability, but also enabled a high mass loading of electrochemically active materials （Zn and MnO2 particles）. The fabricated Zn-MnO2 battery exhibited an areal capacity as high as 3.6 mAh·cm^-2 and could accommodate tensile strains of up to 100% while retaining 89% of its original capacity. The facile solution-based strategy of dip-coating active materials onto a cheap sponge-based stretchable current collector opens up a new avenue for fabricating stretchable batteries.

关键词： stretchable battery,Zn-MnO2 batter silver nanowires,sponge,binary network structure

Printable elastic silver nanowire-based conductor for washable electronic textiles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2020年第10期13卷 2879-2884页

作者： hong-wu zhu Huai-Ling Gao Hao-Yu Zhao Jin Ge Bi-Cheng Hu Jin Huang Shu-hong Yu Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleInstitute of EnergyHefei Comprehensive National Science CenterCAS Center for Exclilence in NanoscienceDepartment of ChemistryUniversity of Science and Technology of ChinaHefei 230026China

Printable elastic conductors promote the wide application of consumable electronic textiles (e-textiles) for pervasive healthcare monitoring and wearable computation. To assure a clean appearance, the e-textiles require a washing process to clean up the dirt after daily use. Thus, it is crucial to develop low-cost printable elastic conductors with strong adhesion to the textiles. Here, we report a composite elastic conductor based on Ag nanowires (NWs) and polyurethane elastomer. The composite could be dispersed into ink and easily printed onto textiles. One-step print could form robust conductive coatings without sealing on the textiles. Interestingly, the regional concentration of Ag NWs within the polyurethane matrix was observed during phase inversion, endowing the elastic conductor with a low percolation threshold of 0.12 vol.% and high conductivity of 3,668 S·cm^−1. Thanks to the high adhesion of the elastic conductors, the resulted e-textiles could withstand repeated stretching, folding, and machine washing (20 times) without obvious performance decay, which reveals its potential application in consumable e-textiles.

关键词： printable elastic conductor electronic textiles washability phase inversion silver nanowires

Failure analysis of 18CrNi3MoA drilling tails

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2012年第5期19卷 421-427页

作者： hong-wu zhu Ya-zheng Liu Le-yu lhobl Lei-ying Wang Bin Huang School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Xining Special Steel Co. Ltd. Xining 810005 China

The fracture of a drilling tail made of 18CrNi3MoA steel in the exchanging water hole was analyzed in terms of inclusions, prior austenite grain size, carburized layers, and fatigue fracture morphology by means of optical microscopy, quantitative metallography, and scanning electron microscopy （SEM）. Fatigue crack initiation and propagation on the drilling tail were also studied. The results showed that the fracture on the drilling tail was not induced by inclusions and the distribution inhomogeneity of prior austenite grain size. Instead, be- cause the outside surface of the exchanging water hole was not continuously geometric, there was a great deal of stress concentration in those areas under continuous twisting, axial impact, and corrosion of mineral water. Thus three crack sources emerged in these areas. Initial cracks centered on these sources spread from the outside surface to the inside surface, and eventually the drilling tail ruptured. Furthermore, the fractograph of the region around the crack sources exhibited a typical ductile dimple fracture pattern, and cracks initiated on the outside sur- face of the carburized layers of the exchanging water hole. Three crack sources could be the sources of fatigue crack propagation. Based on the analysis of fatigue crack propagation, it was further demonstrated that fatigue damage originated from the outside surface of the ex- changing water hole.

关键词： drilling tools failure analysis crack initiation crack propagation

Prevalence of Helicobacter pylori infection in Chinese military personnel:A cross-sectional,multicenter-based study

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2025年第3期31卷 42-49页

作者： Han-Chen Min Chun-Yan Zhang Fang-Yu Wang Xiao-Hui Yu Shan-hong Tang hong-wu zhu Ya-Gang Zhao Ji-Luo Liu Jian Wang Jing-Han Guo Xiao-Mei Zhang Yun-Sheng Yang Chinese People’s Liberation Army Medical School Chinese People’s Liberation Army General HospitalBeijing 100853China Department of Gastroenterology and Hepatology The First Medical CenterChinese People’s Liberation Army General HospitalBeijing 100853China Sixth Healthcare Department The Second Medical CenterChinese People’s Liberation Army General HospitalBeijing 100853China Department of Gastroenterology The 940th Hospital of Joint Logistic Support Force of Chinese People’s Liberation ArmyLanzhou 730050Gansu ProvinceChina Department of Gastroenterology General Hospital of Western Theater CommandChengdu 610011Sichuan ProvinceChina Department of Gastroenterology General Hospital of Southern Theater CommandGuangzhou 510010Guangdong ProvinceChina Department of Epidemiology Naval Medical UniversityShanghai 200433China School of Medicine Nankai UniversityTianjin 300071China National Clinical Research Center for Geriatric Diseases Chinese People’s Liberation Army General HospitalBeijing 100853China

BACKGROUND Helicobacter pylori(***)infection is a prevalent disease encountered in military internal medicine and recognized as the main cause of dyspepsia,gastritis,and peptic ulcer,which are common diseases in military *** guidelines in China state all patients with evidence of active infection with *** are offered ***,the prevalence of *** infection and its regional distribution in the military population remain unclear,which hinders effective prevention and treatment *** the prevalence of *** infection in the military population will aid in the development of customized strategies to better manage this infectious *** To investigate the prevalence of *** infection in the Chinese military population in different geographic *** This multicenter,retrospective study included 22421 individuals from five tertiary hospitals located in north,east,southwest,and northwest cities of *** infection was identified using the urea breath test,which had been performed between January 2020 and December *** Of the 22421 military service members,7416(33.1%)were urea breath *** highest prevalence of *** was in the 30-39 years age group for military personnel,with an infection rate of 34.9%.The majority of infected subjects were younger than 40-years-old,accounting for 70.4%of the infected *** individuals serviced in Lanzhou and Chengdu showed a higher infection prevalence than those in Beijing,Nanjing,and Guangzhou,with prevalence rates of 44.3%,37.9%,29.0%,31.1%,and 32.3%,*** *** infection remains a common infectious disease among military personnel in China and has a relatively high prevalence rate in northwest China.

关键词： Helicobacter pylori Prevalence Military personnel Urea breath test Multicenter study

A General and Programmable Synthesis of Graphene-Based Composite Aerogels by a Melamine-Sponge-Templated Hydrothermal Process

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2020年第2期2卷 1-12页

作者： Jin Ge hong-wu zhu Yuan Yang Yufang Xie Gang Wang Jin Huang Lu-An Shi Oliver G Schmidt Shu-hong Yu Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of ChemistryCAS Center for Excellence in NanoscienceInstitute of Biomimetic Materials and ChemistryUniversity of Science and Technology of ChinaHefei 230026China Institute for Integrative Nanosciences IFW Dresden01609 DresdenGermany Helmholtz-Zentrum Dresden-Rossendorf e.V. Institute of Ion Beam Physics and Materials Research01328 DresdenGermany Center for Advancing Electronics Dresden(cfaed)and Faculty of Chemistry and Food Chemistry Technische Universität Dresden01062 DresdenGermany

Three-dimensional(3D)graphene networks are performance boosters for functional nanostructures in energy-related *** tremendous intriguing nanostructures-decorated 3D graphene networks have been realized,on-demand decoration of nanostructures in the specified position of interest within the whole 3D graphene skeleton is still out of reach,shedding limitations on constructing more sophisticated components with programmable structures which offer enormous potential for the enhancement of performance and exploration of new ***,we report the melamine-sponge(MS)-templated hydrothermal method capable of realizing reduced graphene oxide(RGO)-nanostructure composite aerogels with programmable structures and *** key of this method is using the MS template to preset the structures of choice through programmable solution-processed immobilization of graphene oxide(GO)and ***,the hydrothermal treatment simultaneously removed the MS template and reduced the GO networks without changing the preset *** showcased nine typical RGO-nanostructures composite aerogels to demonstrate the versatility of the MS-templated hydrothermal method.

关键词： 3D graphene graphene aerogel templated assembly macroscopic assembly nanostructures

Sponge-templating synthesis of sandwich-like reduced graphene oxide nanoplates with confined gold nanoparticles and their enhanced stability for solar evaporation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Materials 2020年第10期63卷 1957-1965页

作者： hong-wu zhu Jin Ge Hao-Yu Zhao Lu-An Shi Jin Huang Liang Xu Shu-hong Yu Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleInstitute of EnergyHefei Comprehensive National Science CenterCAS Center for Excellence in NanoscienceDepartment of ChemistryInstitute of Biomimetic Materials&ChemistryUniversity of Science and Technology of ChinaHefei 230026China

Solar evaporation based on plasmonic metal nanoparticles(MNPs)is emerging as a promising ***,the fine structure of MNPs is unstable,and both the high temperature generated by intensive light and corrosive ions in water could damage *** performance will decline after recycling and long-time *** address these issues,we adopted a sponge-templating method for preparing sandwich-like nanoplates with the gold nanoparticles(Au NPs)confined in reduced graphene oxide(rGO)*** to the confinement effect,both the surface melting and ion diffusion were *** solar evaporator based on the sandwich-like nanoplates showed a high solar-vapor conversion efficiency of 85.2%under a high light intensity of 10 *** 30 times recycle of seawater desalination,the conversion efficiency scarcely *** sandwich-like nanoplates with enhanced thermal and chemical stability of Au NPs are promising in the practical application of seawater desalination.

关键词： sponge template confinement effect surface melting desalination

Shared latent dynamical structure for three-dimensional human pose estimation

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2011年第7期54卷 1375-1382页

作者： TONG MingLei 1,HAN hong 2 & zhu wu 1 1 School of Computer and Information,Shanghai University of Electric Power,Shanghai 201300,China 2 Institute of Intelligent Information Processing,Xidian University,Xi’an 710071,China School of Computer and Information Shanghai University of Electric Power Shanghai China Institute of Intelligent Information Processing Xidian University Xi’an China

In this paper,a shared latent dynamical model (SLDM) and its application in tracking 3D human motion from monocular videos are proposed by combining the ideas of Gaussian processes dynamical model with shared latent *** tracking in high-dimensional space,SLDM can map state space and observation space to a shared latent space of low dimensionality with associated *** off-line training,three mappings,including dynamical mapping in latent space and mappings from the latent space to both state space and observation space,are *** model can separate traditional human motion estimation in highdimensional space into two steps: In the first step,the shared latent dynamical variables are estimated;in the second step,the human pose of high dimension is *** in human motion tracking from monocular videos using simulations and real images demonstrate that this human tracking method is efficient.

关键词： visual media shared latent dynamical model 3D human pose estimation

Myocardial injury resulting from radiofrequency catheter ablation： comparison of circumferential pulmonary vein isolation and complex fractionated atrial electrograms ablation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2011年第17期124卷 2674-2677页

作者： ZHANG Feng-xiang YANG Bing CHEN hong-wu JU Wei-zhu CAO Ke-jiang CHEN Ming-long Department of Cardiology First Affiliated Hospital of Nanjing Medical University Nanjing Jiangsu 210029 China

Background Radiofrequency catheter ablation （RFCA） necessarily produces an area of myocardial necrosis. However, the difference of the extent of myocardial injury between circumferential pulmonary vein isolation （CPVI） and complex fractionated atrial electrograms （CFAE） ablation in patients with atrial fibrillation （AF） has not been investigated before. Methods Twenty-nine consecutive male patients （n=29） with either paroxysmal or persistent AF were selected for CPVI or CFAE ablation. The CPVI or CFAE ablation was performed with a three-dimensional electroanatomical mapping system （CARTO）. Serum cardiac biomarkers, for example, cardiac troponin T （cTnT）, aspartate transaminase （AST）, lactate dehydrogenase （LDH）, creatine kinase （CK）, and creatine kinase myocardial bound （CKMB） were determined by the Elecsys STATE immunoassay. Cardiac structure and function were measured with echocardiography. Results Echocardiography showed that there was no significant difference of atrioventricular structure or function parameters between the CPVI group and the CFAE ablation group. Serum cTnT showed a significant increase in the CFAE ablation group over the CPVI group at 12 and 24 hours after the procedure （P〈0.05, respectively）, and then it was reduced to a normal level after 48 hours. Serum AST showed a significant increase in the CFAE ablation group over the CPVI group at post-procedure, 4 and 12 hours after the procedure （P 〈0.05, respectively）, and then it reached to a normal level after 24 hours. There was no significant difference in LDH, CK, or CKMB levels between the CFAE ablation group and the CPVI group at any time point （P〉0.05）. Conclusions cTnT and AST other than LDH, total CK or CKMB activity significantly increased more in the CFAE ablation group than the CPVI group. However, the difference of the serum levels of cTnT, AST between two groups was temporary.

关键词： atrial fibrillation catheter ablation myocardial injury