检索结果-南通市图书馆

Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： H.t.Jeong S.W.Lee W.J.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

the superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the Bccβphase and a small amount of the HcPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

Sleep-based neuronal oscillations as a physiological biomarker for Alzheimer's disease:is night time the right time?

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第7期19卷 1417-1418页

作者： Jonathan Witton Erica S.Brady Michael t.craig Department of clinical and Biomedical Sciences Faculty of Health and Life SciencesUniversity of ExeterExeterEnglandUK Gladstone Institute for Neurological Disease San FranciscoCAUSA School of Psychology and Neuroscience College of MedicalVeterinary and Life SciencesUniversity of GlasgowGlasgowScotlandUK

Dementia is a devastating syndrome characterized by memory problems,confusion,and behavior changes that prevent people from performing everyday *** is the leading cause of dependency and disability amongst older people,resulting in a global economic cost of ~$1.3 *** 58 million people are currently afflicted by dementia worldwide,with Alzheimer s disease(AD) causing most(60-70%) of these cases.

关键词： Alzheimer everyday performing

tensor force impact on shell evolution in neutron-rich Si and Ni isotopes

在线全文

学校读者我要写书评

暂无评论

chinese Physics c 2024年第4期48卷 95-106页

作者： S.V.Sidorov A.S.Kornilova t.Yu.tretyakova Faculty of Physics Lomonosov Moscow State UniversityMoscow 119991Russia Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State UniversityMoscow 119991Russia

the influence of the tensor interaction of nucleons on the characteristics of neutron-rich silicon and nickel isotopes was studied in this *** forces are considered within the framework of the Hartree-Fock approach with the Skyrme *** addition of a tensor component of interaction is shown to improve the description of the splittings between different single-particle states and decrease nucleon-nucleon pairing correlations in silicon and nickel *** attention was directed toward the role of isovector tensor forces relevant to the interaction of like nucleons.

关键词： nuclear shell model tensor interaction silicon isotopes nickel isotopes

conservation laws,Lie symmetries,self adjointness,and soliton solutions for the Selkov–Schnakenberg system

在线全文

学校读者我要写书评

暂无评论

communications in theoretical Physics 2024年第2期76卷 29-44页

作者： Kashif Ali Aly R Seadawy Syed t R Rizvi Noor Aziz Department of Mathematics COMSATS University IslamabadLahore CampusPakistan Mathematics Department Faculty of ScienceTaibah UniversityAl-Madinah Al-Munawarah41411Saudi Arabia

In this article,we explore the famous Selkov–Schnakenberg(SS)system of coupled nonlinear partial differential equations(PDEs)for Lie symmetry analysis,self-adjointness,and conservation ***,miscellaneous soliton solutions like dark,bright,periodic,rational,Jacobian elliptic function,Weierstrass elliptic function,and hyperbolic solutions of the SS system will be achieved by a well-known technique called sub-ordinary differential *** these results are displayed graphically by 3D,2D,and contour plots.

关键词： Selkov-Schnakenberg system Lie symmetry analysis conservation laws adjointness integrability

IgE-Mast cell mediated allergy: a sensor of food quality

在线全文

学校读者我要写书评

暂无评论

Signal transduction and targeted therapy 2024年第1期9卷 8-9页

作者： christopher c.Udoye Rudolf A.Manz Institute for Systemic Inflammation Research University of LübeckLübeckGermany

In two recent studies published in Nature,Florsheim et *** Plum et *** that allergic-specific reactions induced by immunoglobulin(Ig)E mediated mast cell activation is crucial for the timely induction of antigen-avoidance behaviour.1,2 these studies prove the concept that allergic sensitization triggers the formation of avoidance behaviour and define the underlying molecular mechanism.

关键词： allergic mechanism

Leveraging the potential of big genomic and phenotypic data for genome-wide association mapping in wheat

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

the crop Journal 2024年第3期12卷 803-813页

作者： Moritz Lell Yusheng Zhao Jochen c.Reif Leibniz Institute of Plant Genetics and crop Plant Research(IPK) Corrensstraße 3D-06466 SeelandGermany

Genome-wide association mapping studies(GWAS)based on Big Data are a potential approach to improve marker-assisted selection in plant *** number of available phenotypic and genomic data sets in which medium-sized populations of several hundred individuals have been studied is rapidly *** these data and using them in GWAS could increase both the power of QtL discovery and the accuracy of estimation of underlying genetic effects,but is hindered by data heterogeneity and lack of *** this study,we used genomic and phenotypic data sets,focusing on central European winter wheat populations evaluated for heading *** explored strategies for integrating these data and subsequently the resulting potential for *** interoperability between data sets was greatly aided by some overlapping genotypes and a linear relationship between the different phenotyping protocols,resulting in high quality integrated phenotypic *** this context,genomic prediction proved to be a suitable tool to study relevance of interactions between genotypes and experimental series,which was low in our *** to expectations,fewer associations between markers and traits were found in the larger combined data than in the individual experimental ***,the predictive power based on the marker-trait associations of the integrated data set was higher across data ***,the results show that the integration of medium-sized to Big Data is an approach to increase the power to detect QtL in *** results encourage further efforts to standardize and share data in the plant breeding community.

关键词： Big Data Genome-wide association study Data integration Genomic prediction Wheat

Learning about good nutrition with the 5-color front-of-package label"Nutri-Score":an experimental study

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第3期13卷 1195-1200页

作者： Robin c.Hau Klaus W.Lange University of Applied Sciences Landshut Landshut 84036Germany Faculty of Human Sciences University of RegensburgRegensburg 93040Germany

the Nutri-Score is a 5-color front-of-pack nutrition label designed to provide consumers with an easily understandable guideline to the healthiness of food *** impact that the Nutri-Score may have on consumers'choices is unclear since different experimental paradigms have found vastly different effect *** the present study,we have investigated how student participants change a hypothetical personal 1-daydietary plan after a learning phase during which they learn about the Nutri-Scores of the available food *** were instructed to compose a healthy diet plan in order that the question of whether the NutriScore would improve their ability to compose a healthy dietary plan could be investigated,independent of the question of whether they would apply this knowledge in their ordinary *** found a substantial(cohen's d=0.86)positive impact on nutritional quality(as measured by the Nutrient Profiling System score of the Food Standards Agency)and a medium-sized(cohen's d=0.43)reduction of energy *** content reduction was larger for participants who had initially composed plans with higher energy *** results suggest that the Nutri-Score has the potential to guide consumers to healthier food *** remains unclear,however,whether this potential will be reflected in real-life dietary choices.

关键词： Nutri-Score Front-of-package label Nudge Nutrition Health

SMILE soft X-ray Imager flight model ccD370 pre-flight device characterisation

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2024年第1期8卷 25-38页

作者： S.Parsons D.J.Hall O.Hetherington t.W.Buggey t.Arnold M.W.J.Hubbard A.Holland centre for Electronic Imaging the Open UniversityMilton KeynesMK76AAUK

throughout the SMILE mission the satellite will be bombarded by radiation which gradually damages the focal plane devices and degrades their *** order to understand the changes of the ccD370s within the soft X-ray Imager,an initial characterisation of the devices has been carried out to give a baseline performance *** ccDs have been characterised,the two flight devices and the flight spa *** has been carried out at the Open University in a bespo ke cleanroom measure ment *** results show that there is a cluster of bright pixels in the flight spa re which increases in size with tempe *** at the nominal ope rating tempe rature(-120℃) it is within the procure ment ***,the devices meet the specifications when ope rating at -120℃ in 6 × 6 binned frame transfer science *** se rial charge transfer inefficiency degrades with temperature in full frame *** any charge losses are recovered when binning/frame transfer is implemented.

关键词： ccD soft X-ray imager characterisation SMILE

有量化输入的受干扰磁悬浮系统的鲁棒自适应渐近跟踪控制

在线全文

学校读者我要写书评

暂无评论

控制与决策 2024年第8期39卷 2656-2662页

作者：徐甜莉孙宗耀蔡彬陈智强曲阜师范大学自动化研究所曲阜师范大学工学院国立成功大学系统及船舶机电工程学院

研究磁悬浮系统在非线性建模下的两个问题:时变有界扰动产生的系统振荡和通信网络传输导致的数据丢失.首先,借助于同胚坐标变换对磁悬浮系统不可控的高度非线性进行抑制;然后,在控制中分别利用自适应律和指数衰减项来消除外部风阻和内... 详细信息

研究磁悬浮系统在非线性建模下的两个问题:时变有界扰动产生的系统振荡和通信网络传输导致的数据丢失.首先,借助于同胚坐标变换对磁悬浮系统不可控的高度非线性进行抑制;然后,在控制中分别利用自适应律和指数衰减项来消除外部风阻和内部噪声电压,并将指数衰减项与量化分解方法相结合弥补量化误差带来的影响.所构造的连续鲁棒自适应反馈控制器解决了有量化输入和受干扰磁悬浮系统的渐近跟踪问题.最后,用仿真结果验证了控制策略的有效性.

关键词：受干扰磁悬浮系统量化输入鲁棒自适应渐近跟踪