检索结果-南通市图书馆

Transactions of Nonferrous Metals Society of China 2010年第10期20卷 1822-1828页

作者： P.VENKATACHALAM S.RAMESH KUMAR b.ravisankar V.THOMAS PAUL M.VIJAYALAKSHMI Department of Metallurgical and Materials Engineering National Institute of Technology Physical Metallurgy Division IGCAR

Al-Cu alloy was deformed through equal channel angular pressing(ECAP) by routes A,ba,bc and C up to 5 *** was done using a 90° die for three different conditions,namely 1) as received,2) solutionised at 768 K for 1 h and 3) solutionised at 768 K for 1 h + aged at 468 K for 5 *** microstructure,microhardness and tensile strength were studied for all the three conditions and four *** improvement in hardness(HV 184 after five passes) and strength(602 MPa after three passes) was observed in solutionised and aged 2014 Al alloy deformed through route *** evolution was reasonably equiaxed in route bc with aspect ratio of *** and aged 2014 Al alloy deformed through route bc was identified to have better microstructure and mechanical property than the other processing routes and conditions.

关键词： ECAP processing route 2014 aluminium alloy

Optical absorption of Tl^+ ions in Kbr_(1-x)I_x:TlI mixed crystals

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2009年第4期20卷 208-218页

作者： Eswaran P ravisankar R Nagarajan S Department of Physics SMK Fomra Institute of Technology Department of Physics Government Arts CollegeThiruvannamalai Department of Physics Pondicherry Engineering College

Optical absorption spectra of the mixed crystals of Kbr1-xIx:Tl+ crystals studied at room temperature are *** absorption spectra indicated the appearance of additional bands on the low energy side of the Characteristic A,b and C absorption bands of Kbr:Tl+ single crystals with increasing iodine *** with earlier reports,the additional bands were attributed to the complex Tl+centers in the mixed configuration surrounded by br-and I-ions as nearest *** absorption spectra of gamma irradiated mixed crystals showed F band,which shifts towards low energy side with the composition of iodine ions in the mixed crystals.

关键词：能级核技术光谱吸收碘离子

Measurement of natural radionuclides in bricks and brick-making clays from Cuddalore district,Tamilnadu,India

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2010年第4期21卷 218-220页

作者： G.Viruthagiri R.ravisankar b.Rajamannan K.Thillaivelavan A.Chandrasekaran V.Meenkshisundram Deptartment of physics Annamalai University Post Graduate and Research Department of Physics Govt.Arts College Department of Physics Govt.Arts College Department of Physics Sacred Heart College Radiological Safety Division Indira Gandhi Centre for Atomic Research(IGCAR)

In India,bricks as building materials are mainly prepared by clay using the deposited sediments of rivers,and the radionuclide contents in bricks and brick-making clays should vary with origin and geological *** this paper,the radionuclide contents of these materials from river bank areas of Cuddalore district,Tamilnadu India are measured by gamma ray spectrometer using NaI(Tl) detector,and compared with those of other *** radiation hazard indices,which are evaluated by radium-equivalent(Raeq) activity,are lower than that of NEA-OECD.

关键词：射线测量天然放射性核素制砖粘土印度放射性核素含量河流沉积物建筑材料

Neuroinflammation revisited through the microglial lens

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 1989-1990页

作者： Renato Socodato João b.Relvas Institute of Research and Innovation in Health(i3S)and Institute for Molecular and Cell biology(IbMC) University of PortoPortoPortugal Department of biomedicine Faculty of Medicine of the University of Porto(FMUP)PortoPortugal

Neuroimmunology is emerging as a pivotal field,shedding light on the intricate dialogues between the central nervous system(CNS)and the immune *** exploration is particularly significant in understanding microglia,the CNS’s innate immune cells,beyond the conventional conflation of“neuroinflammation”and“microglial activation.”This conflation has clouded the true complexity of these processes,potentially stalling scientific progress and the development of new *** challenge the long-standing perspectives that have oversimplified these interactions,advocating for a deeper exploration of the dynamic relationship between neuroinflammation and microglial *** dissecting specific molecular pathways,we aim to illuminate their elaborate roles in neuroinflammatory responses,especially in the context of Alzheimer’s disease(AD).Here,neuroinflammation is not merely a passive observer or a direct antagonist but a complex agent in the disease’s *** article calls for a significant paradigm shift towards an integrative,multi-omics approach to *** such a comprehensive framework is crucial for advancing our understanding of neuroinflammatory conditions and paving the way for targeted therapeutic strategies for brain diseases.

关键词： inflammation simplified activation

EDXRF analysis of beach rock samples of Andaman Island

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2009年第2期20卷 93-98页

作者： ravisankar R Eswaran P Vijay Anand K Rajalakshmi A Prasad MVR Satpathy K K Rajashekhar C Alok Athavale Department of Physics Sri Sivasubramania Nadar College of Engineering Department of Physics SMK Fomra Institute of Technology Environmental and Industrial Safety Section Safety GroupIndira Gandhi Centre for Atomic Research Paleobiology Group Agharkar Research Institute

b Elemental contents of beach rock samples were analyzed using *** samples were collected from three locations of Andaman *** Al,Ca,K,Fe,Ti,Si,V,Co,Cu,ba,Zn,Pb,Cd and Mn contents were *** geochemical behavior of elements in the region is *** elemental contents of beach rock samples from Andaman Island are much below the values of both earth crust and that of Tamilnadu ***,content of the biogenic element Ca was the highest of all *** is due to the typical beach rock formation.

关键词：能量色散X射线荧光分析岩石样本海滩地球化学行为元素含量生物元素锰含量样品

Influence of Microstructure and Experimental Parameters on Mechanical and Wear Properties of Al-TiC Surface Composite by FSP Route

在线全文

学校读者我要写书评

暂无评论

Journal of Minerals and Materials Characterization and Engineering 2012年第5期11卷 493-507页

作者： S. Jerome S. Govind bhalchandra S.P. Kumaresh babu b. ravisankar Department of Metallurgical and Materials Engineering National Institute of Technology Tiruchirappalli – 620 015 Tamilnadu India

Surface properties decide the fatigue, wear and corrosion behavior of a material. Hence their performance can be improved by surface modifications. Friction Stir Processing (FSP) is a promising technique to develop surface composite. The aim of the present study is to develop defect free surface composite of Al 5083 alloy reinforced with TiC particles and investigate the particle distribution in the matrix, mechanical properties and wear behavior of the composites. Microstructural observations were carried out by using optical and scanning electron microscopy (SEM). The microstructural studies revealed that distribution of particles were more uniform in samples subjected to double pass than the single pass FSP. The microhardness profiles along top surface and across the cross section of the processed samples were evaluated. The average hardness along the top surface was found to increase by 27.27%, as compared to that of the base metal (88Hv). The particles were incorporated maximum average depth about 250μm in the surface composite. The slurry erosion tests revealed that the wear rate was highly reduced in case of double pass FSP samples as compared to base metal and single pass FSPed

关键词： Al- TiC surface composite Friction stir processing Microhardness Wear resistance

Machine learning in solid organ transplantation:Charting the evolving landscape

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

World Journal of Transplantation 2025年第1期15卷 165-177页

作者： badi Rawashdeh Haneen Al-abdallat Emre Arpali beje Thomas Ty b Dunn Matthew Cooper Division of Transplant Surgery Medical College of WisconsinMilwaukeeWI 53202United States Department of Medicine Jordan University HospitalAmman 11263Jordan Department of Nephrology Medical College of WisconsinMilwaukeeWI 53226United States

bACKGROUND Machine learning(ML),a major branch of artificial intelligence,has not only demonstrated the potential to significantly improve numerous sectors of healthcare but has also made significant contributions to the field of solid organ *** provides revolutionary opportunities in areas such as donorrecipient matching,post-transplant monitoring,and patient care by automatically analyzing large amounts of data,identifying patterns,and forecasting *** To conduct a comprehensive bibliometric analysis of publications on the use of ML in transplantation to understand current research trends and their *** On July 18,a thorough search strategy was used with the Web of Science *** and transplantation-related keywords were *** the aid of the VOS viewer application,the identified articles were subjected to bibliometric variable analysis in order to determine publication counts,citation counts,contributing countries,and institutions,among other *** Of the 529 articles that were first identified,427 were deemed relevant for bibliometric analysis.A surge in publications was observed over the last four years,especially after 2018,signifying growing interest in this *** 209 publications,the United States emerged as the top ***,the"Journal of Heart and Lung Transplantation"and the"American Journal of Transplantation"emerged as the leading journals,publishing the highest number of relevant *** keyword searches revealed that patient survival,mortality,outcomes,allocation,and risk assessment were significant themes of *** The growing body of pertinent publications highlights ML's growing presence in the field of solid organ *** bibliometric analysis highlights the growing importance of ML in transplant research and highlights its exciting potential to change medical practices and enhance patient *** collaboration between signific

关键词： Machine learning Artificial Intelligence Solid organ transplantation bibliometric analysis

Compact embedding in besov spaces and b-separable elleptic operators

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

Science China Mathematics 2010年第4期53卷 1067-1084页

作者： SHAKHMUROV Veli b. Department of Electronics Engineering and Communication Okan University

Necessary and sufficient conditions for compactness of sets in banach space valued besov class bp,q s(Ω;E) is *** embedding theorems in besov-Lions type spaces b l,s p,q(Ω;E0,E) are studied,where E0,E are two banach spaces and E 0  *** most regular class of interpolation space E α,between E 0 and E are found such that the mixed differential operator D α is bounded and compact from b p,q l,s (Ω;E 0,E) to b p,q s (Ω;E α) and Ehrling-Nirenberg-Gagliardo type sharp estimates *** using these results the separability of differential operators with variable coefficients and the maximal b-regularity of parabolic Cauchy problem are *** applications,the infinite systems of the elliptic partial differential equations and parabolic Cauchy problems are studied.

关键词： embedding theorems banach-valued function spaces differential-operator equations maximal b-regularity operator-valued Fourier multipliers interpolation of banach spaces abstract parabolic Cauchy problem

Estimation of radiative capture^(13)b(n,γ0+1)^(14)b reaction rate in the modified potential cluster model

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2023年第10期47卷 130-142页

作者： A.S.Tkachenko N.A.burkova b.M.Yeleusheva S.b.Dubovichenko Fesenkov Astrophysical Institute 050020AlmatyKazakhstan al-Farabi Kazakh National University 050040AlmatyKazakhstan

We discuss current attempts to employ the modified potential cluster model to describe the available experimental data on the^(13)b(n,γ0+1)^(14)b total *** estimated results of the M1 and E1 transitions from the n^(13)b scattering states to the ground and first excited states of^(14)b are *** 1st resonance at Ex=1.275 MeV(1+)is revealed in both the cross-section and reaction *** the variation in the asymptotic constant,a thermal cross-section interval of 5.1-8.9 mb is *** on the theoretical total cross-sections at energies of 0.01 eV to 5 MeV,we calculate the reaction rate in the temperature range of 0.01 to *** ignition T9 values of the^(13)b(n,γ0+1)^(14)b reaction depending on a neutron number density n_(n)of~10^(22)cm^(−3)are *** radiative neutron capture reaction rates on the boron^(10-13)b and carbon^(12-14)Сisotopes are compared.

关键词： radiative neutron capture ^(14)b nucleus total cross-sections reaction rate potential cluster model r-process

Microstructural characteristics of Nd_2Fe_(14)b/α-Fe nanocomposite ribbons bearing Nb element

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2008年第3期27卷 299-302页

作者： WANG Zhanyong LIU Wenqing ZHOU bangxin NI Jiansen XU Hui LI Qiang Department of Materials Engineering Shanghai Institute of Technology Shanghai 200235 China Institute of Materials Shanghai University Shanghai 200072 China

The effects of Nb on the microstructure and magnetic properties of （Nd0.9Dy0.1）9.5Fe79_xCo5Nbxb6.5 （x = 0, 1） nanocomposite magnets were investigated. A fine and uniform microstructure was achieved for the ribbons annealed at 710℃ for 4 min, enhancing the interaction coupling between grains and improving the magnetic properties. The results of three-dimensional atom probe （3DAP） indicated that Fe-Nb-b inter- granular phase existed at the grain boundaries, suppressing the grain growth during the crystallization process. The coercivity was improved from 224 to 643 kA/m for the modification of the microstructure.

关键词： Nd2Fe14b/α-Fe nanocomposite magnet 3DAP magnetic properties