检索结果-南通市图书馆

shear band evolution and mechanical behavior of cold-rolled Zr-based amorphous alloy sheets:An in-situ study

Journal of Materials science & technology 2024年第14期181卷 115-127页

作者： C.Y.Zhang Z.W.Zhu s.t.li Y.Y.Wang Z.K.li H.li G.Yuan H.F.Zhang school of Metallurgy Northeastern UniversityShenyang 110819China shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China the state Key Laboratory of Rolling and Automation(RAL) Northeastern UniversityShenyang 110819China

Cold rolling process can regulate the microstructure and mechanical properties of amorphous alloys,but it is still a challenging task to reveal their microscopic ***,we designed an in-situ sEM observation device for the cold rolling process of amorphous alloy,and visually observed the formation and evolution of shear bands during single-pass and multi-pass rolling process of the Zr_(55)Cu_(30)Al_(10)Ni_(5)amorphous alloy *** is found that the evolution process of shear bands in the rolling process of amorphous alloy shows heritability,which is mainly reflected in two aspects:one is that the shear band formation pattern in the single-pass rolling process is more inclined to inherit the previous shear band formation pattern;the other is that the shear deformation is more likely to occur in the pre-existing shear bands in the multi-pass rolling *** rule can be used to guide the controlled genera-tion of shear bands in amorphous ***,we emphasized the importance of pre-existing shear band orientations and systematically investigated the mechanical behavior of the amorphous alloys with pre-existing shear bands by in-situ sEM *** is found that the mechanical properties of the as-rolled amorphous alloys are determined by the competition between the work-softening of the pre-existing shear band itself and the work-hardening caused by the blocking effect of the pre-existing shear bands on the shear *** on this,we enhance the tensile fracture strength and the tensile ductility of the amorphous alloy by adjusting the orientation of the pre-existing shear bands parallel to the tensile stress axis so that the pre-existing shear bands prevent the linear propagation and destruction of the new shear bands.

关键词： Amorphous alloy Cold rolling shear band Mechanical behavior In-situ study Plasticity

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

Circadian nutrition:is meal timing an elixir for fatigue?

引用

science Bulletin 2025年第3期70卷 309-312页

作者： Zhihui Zhang Lu Yan Jonas t.treebak Min-Dian li Department of Cardiovascular Medicine Center for Circadian Metabolism and Cardiovascular DiseaseSouthwest HospitalArmy Medical UniversityChongqing 400038China Ministry of Education(MOE)Key Laboratory of Geriatric Cardiovascular and Cerebrovascular Disease Chongqing 400038China Novo Nordisk Foundation Center for Basic Metabolic Research Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagen 2200Denmark

Fatigue is increasingly prevalent in industrialized societies,highlighting an urgent need for effective clinical and lifestyle *** manifests as reduced muscle endurance,strength and a persistent sensation of exhaustio... 详细信息

关键词： fatigue strength sensation

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

Free vibration and transient response of double curved beams connected by intermediate straight beams

引用

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-tALOOKOLAEI H.GHANDVAR E.JUMAEV s.KHAtIR t.CUONG-LE school of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and science Center for Engineering Application and technology solutions Ho Chi Minh City Open University

this paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. the strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. the curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. subsequently, the natural frequencies and transient response of the system are determined. the accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANsYs, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

关键词： double curved beam finite element method functionally graded porous (FGP) material intermediate straight beam O313 vibration analysis

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

ti^(3+)/ti^(4+)and Co^(2+)/Co^(3+)redox couples in Ce-doped Co-Ce/tiO2 for enhancing photothermocatalytic toluene oxidation

引用

Journal of Environmental sciences 2025年第3期149卷 164-176页

作者： Guanghui li Xiaolan li Xinhui Hao Qiang li Meng Zhang Hongpeng Jia Xiamen Key Laboratory of Materials for Gaseous Pollutant Control Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China CAs Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of sciences Beijing 100049China

Cerium and cobalt loaded Co-Ce/tiO_(2)catalyst prepared by impregnation method was investigated for photothermal catalytic toluene *** on catalyst characterizations(XPs,EPR and H2-tPR),redox cycle between Co and tiO_(2)(Co^(2+)+ti^(4+)↔Co^(3+)+ti^(3+))results in the formation of Co^(3+),ti^(3+)and oxygen vacancies,which play important roles in toluene catalytic oxidation *** introduction of Ce brings in the dual redox cycles(Co^(2+)+ti^(4+)↔Co^(3+)+ti^(3+),Co^(2+)+Ce4+↔Co^(3+)+Ce3+),further promoting the elevation of reaction sites *** full spectrum irradiation with light intensity of 580mW/cm^(2),Co-Ce/tiO_(2)catalyst achieved 96%of toluene conversion and 73%of CO_(2)yield,obviously higher than Co/P25 and Co/tiO_(2).Co-Ce/tiO_(2)efficiently maintains 10-hour stability test under water vapor conditions and exhibits better photothermal catalytic performance than counterparts under different wavelengths *** catalytic reaction displays improved activities compared with thermal catalysis,which is attributed to the promotional effect of light including photocatalysis and light activation of reactive oxygen species.

关键词： Photothermal catalysis Redox cycle Oxygen vacancy VOCs titanium dioxide

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

Holographic images of a charged black hole in Lorentz symmetry breaking massive gravity

引用

science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 59-72页

作者： Xiao-Xiong Zeng li-Fang li Pan li Bo liang Peng Xu College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China Department of Mechanics Chongqing Jiaotong UniversityChongqing 400074.China Center for Gravitational Wave Experiment National Microgravity LaboratoryInstitute of MechanicsChinese Academy of SciencesBeijing 100190China Lanzhou Center of theoretical Physics Lanzhou UniversityLanzhou 730000China

Using the Ads/CFt correspondence,this paper investigates the holographic images of a charged black hole within the context of Lorentz symmetry breaking massive *** photon rings,luminosity-deformed rings,or light points from various observational perspectives are *** also study the influences of both the chemical potential and temperature on the Einstein *** the previous work,which primarily examines the effect of chemical potential on ring radius at high temperatures and find no change in the radius with varying chemical potential,we also investigate the effect of chemical potential on the ring radius at low temperature besides at high *** findings indicate that at low temperatures,the photon ring radius decreases with increasing of chemical potential,while at high temperatures,the results are consistent with previous ***,we explore the impact of the model parameterλon the Einstein ring radius and find the the ring radius increases as the model parameterλ*** interestingly,for the large chemical potential,u=1,the temperature dependence of the photon ring radius is reversed forλ=2 andλ=***,for a small chemical potential u=0.1,the temperature dependence of the Einstein ring stays the same asλ=2 andλ=4.

关键词： Ads/CFt correspondence holographic images massive gravity black holes

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

Exercise preconditioning alleviates ischemia-induced memory deficits by increasing circulating adiponectin

引用

Neural Regeneration Research 2025年第5期20卷 1445-1454页

作者： Meifeng Zheng Borui Zhang sonata s Y Yau Kwok-Fai so li Zhang Haining Ou Department of Rehabilitation Medicine Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Medicine The Fifth Clinical College of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of CNs Regeneration(Ministry of Education) Guangdong-Hong Kong-Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina state Key Laboratory of Brain and Cognitive science Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina Center for Exercise and Brain science School of PsychologyShanghai University of SportShanghaiChina Neuroscience and Neurorehabilitation Institute University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina

Cerebral ischemia is a major health risk that requires preventive approaches in addition to drug *** exercise enhances neurogenesis and synaptogenesis,and has been widely used for functional rehabilitation after *** this study,we determined whether exercise training before disease onset can alleviate the severity of cerebral *** also examined the role of exercise-induced circulating factors in these *** mice were subjected to 14 days of treadmill exercise training before surgery for middle cerebral artery *** found that this exercise pre-conditioning strategy effectively attenuated brain infarct area,inhibited gliogenesis,protected synaptic proteins,and improved novel object and spatial memory *** analysis showed that circulating adiponectin plays a critical role in these preventive effects of *** activation of adiponectin receptors by Adipo Ron mimicked the effects of exercise,while inhibiting receptor activation abolished the exercise *** summary,our results suggest a crucial role of circulating adiponectin in the effects of exercise pre-conditioning in protecting against cerebral ischemia and supporting the health benefits of exercise.

关键词： adiponectin cerebral ischemia exercise pre-conditioning hippocampus memory function middle cerebral artery occlusion prefrontal cortex synaptic proteins treadmill exercise

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

towards a blank design method for manufacturing big-tapered profiled ring disk by spinning-rolling process

引用

Chinese Journal of Aeronautics 2025年第1期38卷 70-86页

作者： Xuechao li lianggang GUO Xiaoqing CHEN Heng li state Key Laboratory of solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China school of Materials science and Engineering Xinjiang UniversityUrumqi 830017China National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China CNPC Baoji Oilfield Machinery Co. LtdBaoji 721000China

the big-tapered profiled ring disk is a key component of engines for rockets and missiles.A new forming technology,as called spinning-rolling process,has been proposed previously for the high performance,high efficiency and low-cost manufacturing of the *** design is the key part of plastic forming process *** spinning-rolling process,the shape and size of the blank play a crucial role in process stability,deformation behavior and dimensional *** this work proposes a blank design method to determine the geometry structure and sizes of the *** mathematical model for calculating the blank size has been deduced based on volume conservation and neutral layer length invariance *** FE simulation and corresponding trial production of an actual big-tapered profiled ring disk show that the proposed blank design method is *** order to obtain a preferred blank,the influence rules of blank size determined by different deformation degrees(rolling ratio k)on the spinning-rolling process are revealed by comprehensive FE *** considering the process stability,circularity of the deformed ring disk and forming forces,a reasonable range of deformation degree(rolling ratio k)is recommended for the blank design of the new spinning-rolling process.

关键词： Blank design method spinning-rolling process Big-tapered profiled ring disk Rolling ratio Intelligent FE simulation

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

Geometric-like imaginarity:Quantification and state conversion

引用

science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 13-22页

作者： Meng-li Guo Bo li shao-Ming Fei school of science East China University of TechnologyNanchang 330006China school of Computer and Computing science Hangzhou City University Hangzhou 310015China school of Mathematical sciences Capital Normal UniversityBeijing 100048China

From the perspective of resource-theoretic approach,this study explores the quantification of imaginary in quantum *** propose a well defined measure of imaginarity,the geometric-like measure of *** with the usual geometric imaginarity measure,this geometric-like measure of imaginarity exhibits smaller decay difference under quantum noisy channels and higher *** applications,we show that both the optimal probability of state transformations from a pure state to an arbitrary mixed state via real operations,and the maximal probability of stochastic-approximate state transformations from a pure state to an arbitrary mixed state via real operations with a given fidelity f,are given by the geometric-like measure of imaginarity.

关键词： quantum resource theory imaginarity geometric-like channels state transformations

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

Review on the abiotic degradation of biodegradable plastic poly(butylene adipate-terephthalate):Mechanisms and main factors of the degradation

引用

Chinese Chemical Letters 2025年第1期36卷 158-164页

作者： Haibo Ye Qianyu li Juan li Didi li Zhimin Ao Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health Guangzhou Key Laboratory Environmental Catalysis and Pollution ControlInstitute of Environmental Health and Pollution ControlGuangzhou 510006China Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of EducationSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China Advanced Interdisciplinary Institute of Environment and Ecology Beijing Normal UniversityZhuhai 519087China school of Environment Beijing Normal UniversityBeijing 100875China

Poly(butylene adipate-terephthalate)(PBAt),as one of the most common and promising biodegradable plastics,has been widely used in agriculture,packaging,and other industries due to its strong biodegradability *** is well known that PBAt suffers a series of natural weathering,mechanical wear,hydrolysis,photochemical transformation,and other abiotic degradation processes before being ***,it is particularly important to understand the role of abiotic degradation in the life cycle of *** the abiotic degradation of PBAt has not been systematically summarized,this review aims to summarize the mechanisms and main factors of the three major abiotic degradation pathways(hydrolysis,photochemical transformation,and thermochemical degradation)of *** was found that all of them preferentially destroy the chemical bonds with higher energy(especially C-O and C=O)of PBAt,which eventually leads to the shortening of the polymer chain and then leads to reduction in molecular *** main factors affecting these abiotic degradations are closely related to the energy or PBAt *** findings provide important theoretical and practical guidance for identifying effective methods for PBAt waste management and proposing advanced schemes to regulate the degradation rate of PBAt.

关键词： Biodegradable plastics PBAt Abiotic degradation Degradation mechanism

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

Computational Insights into the Interactions of Farnesoid X Receptor with Fargesone A,a Natural Product from Magnolia fargesii

引用

Chemical Research in Chinese Universities 2025年第1期41卷 146-154页

作者： ZHANG li CHEN Yaqiong li Weihua school of Pharmacy Shanghai Key Laboratory of Molecular ImagingShanghai University of Medicine and Health SciencesShanghai201318P.R.China school of Pharmacy East China University of Science and TechnologyShanghai200237P.R.China

Farnesoid X receptor(FXR)is a ligand-activated nuclear receptor and plays important roles in the regulation of metabolism and homeostasis of several important physiological substances,such as bile acids,glucose,and *** such,FXR has become a promising therapeutic target for the treatment of several metabolic diseases and liver ***,fargesone A(FA),a natural product from Magnolia fargesii was identified to be a novel,potent FXR agonist that demonstrated good in vitro and in vivo ***,the detailed interaction mechanism of FA with FXR remains *** this study,we employed multiple computational approaches including molecular docking,molecular dynamics simulation,and binding free energy calculation to address the *** comparisons of the structural dynamics and binding free energies,an optimal binding mode was identified,in which FA interacts with FXR via a direct hydrogen bond with His447 and hydrophobic interactions with multiple residues,such as Leu287,Met290,Met328,Ile352,and *** mutants,namely,H447F and L287N,were further constructed to validate the importance of the identified *** anticipate that these findings could be helpful for future rational design of new FA analogues targeting FXR.

关键词： Farnesoid X receptor(FXR) Binding mode Molecular docking Molecular dynamics Fargesone A

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：