检索结果-南通市图书馆

Thermal Conductivity and Tensile Properties of Carbon Nanofiber-Reinforced Aluminum-Matrix Composites Fabricated via Powder Metallurgy: Effects of Ball Milling and Extrusion Conditions on Microstructures and Resultant Composite Properties

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2019年第5期32卷 573-584页

作者： Fumio Ogawa Shuji Yamamoto Chitoshi masuda Department of Mechanical Engineering College of Science and Engineering Ritsumeikan University Kanto Gakuin University Kagami Memorial Institute for Materials Science and Technology Waseda University

Carbon nanofiber(CNF)-reinforced aluminum-matrix composites were fabricated via ball milling and spark plasma sintering(SPS), SPS followed by hot extrusion and powder extrusion. Two mixing conditions of CNF and aluminum powder were adopted: milling at 90 rpm and milling at 200 rpm. After milling at 90 rpm, the mixed powder was sintered using SPS at 560 °C. The composite was then extruded at 500 °C at an extrusion ratio of 9. Composites were also fabricated via powder extrusion of powder milled at 200 rpm and 550 °C with an extrusion ratio of 9(R9) or 16(R16). The thermal conductivity and tensile properties of the resultant composites were evaluated. Anisotropic thermal conductivity was observed even in the sintered products. The anisotropy could be controlled via hot extrusion. The thermal conductivity of composites fabricated via powder extrusion was higher than those fabricated using other methods. However, in the case of specimens with a CNF volume fraction of 4.0%, the thermal conductivity of the composite fabricated via SPS and hot extrusion was the highest. The highest thermal conductivity of 4.0% CNF-reinforced composite is attributable to networking and percolation of CNFs. The effect of the fabrication route on the tensile strength and ductility was also investigated. Tensile strengths of the R9 composites were the highest. By contrast, the R16 composites prepared under long heating duration exhibited high ductility at CNF volume fractions of 2.0% and 5.0%. The microstructures of composites and fracture surfaces were observed in detail, and fracture process was elucidated. The results revealed that controlling the heating and plastic deformation during extrusion will yield strong and ductile composites.

关键词： Al composite Carbon nanofiber Ball milling Hot extrusion Microstructure and performance

Complex trace element effects of source mixing-fractional crystallization composite processes in Kalaan granodiorite pluton along Wulungu tectonic belt,northern Xinjiang

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 1995年第8期38卷 987-995页

作者：刘伟 A.masuda Changsha Institute of Geotectonics Chinese Academy of SciencesChangsha 410013China Chemistry Department Faculty of ScienceThe University of TokyoJapan

Mixing-fractional crystallization composite processes generate 6 complex patterns,which are synthesized into 3 models,on C^2_1/C^3_1-C^1_1/C^3_1 ratio correlation plots of trace eleroents E_1,E_2,E_3 according to their relative *** of the six effects are clearly displayed on ratio-ratio correlation plots of trace elements in the Kalaan granodiorite pluton,indicative of a source mixing-fractional crystallization composite *** overlying lithospheric mantle was modified by the subduction of oceanic plate during Palaeozoic. The incompatibility order of the 7 concerned trace elements is D_(Ta)

关键词： trace element effects geochemical behavior source mixing-fractional crystallization granodiorite Kalaan

Torsion in the Cohomology of Torus Orbifolds

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2017年第6期38卷 1247-1268页

作者： Hideya KUWATA Mikiya masuda Haozhi ZENG Department of Mathematics Osaka City UniversitySumiyoshi-kuOsaka 558-8585Japan School ofMathematical Sciences Fudan UniversityShanghai 200433China.

The authors study torsion in the integral cohomology of a certain family of2 n-dimensional orbifolds X with actions of the n-dimensional compact torus. Compact simplicial toric varieties are in our family. For a prime number p, the authors find a necessary condition for the integral cohomology of X to have no p-torsion. Then it is proved that the necessary condition is sufficient in some cases. The authors also give an example of X which shows that the necessary condition is not sufficient in general.

关键词： Toric orbifold Cohomology Torsion

Hunting hidden pieces of signaling pathways in hepatocellular carcinoma

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2019年第1期8卷 74-76页

作者： Mari masuda Laboratory of Collaborative Research Division of Cellular SignalingNational Cancer Center Research InstituteTokyoJapan

Advanced hepatocellular carcinoma(HCC)has a poor prognosis with limited treatment *** the last decade,sorafenib,a multi-tyrosine kinase inhibitor(TKI),has been the only available systemic agent for first-line treatment of unresectable HCC(1).Recently,another multi-TKI,lenvatinib,was added to the list of first-line treatment alternatives based on the results of the phase III RREFLECT *** second-line treatment,two multi-TKIs,regorafenib and cabozantinib,were approved in 2016 and 2018,*** other targeted therapies,ramucirumab and an anti-PD-1 antibody,nivolumab,will soon be added in a second-line setting to the therapeutic *** agents,however,generally lead to disease stabilization rather than tumor *** of complete remission with available systemic treatments still remains rare,however,and therapeutic breakthroughs are still needed.

关键词： hepatocellular prognosis treatment

Numerical Analysis of Turbulent Sonic Jets from Two-Dimensional Convergent Nozzles

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

Journal of Thermal Science 2011年第2期20卷 133-138页

作者： Hideo KASHIMURA Yuya masuda Yoshiaki MIYAZATO Kazuyasu MATSUO Department of Control and Information Systems Engineering Kitakyushu National College of Technology 5-20-1ShiiKokuraminami-kuKitakyushuFukuoka802-0985JAPAN Department of Mechanical Systems Engineering The University of Kitakyushu1-1HibikinoWakamatsu-kuKitakyushuFukuoka808-0135JAPAN

The numerical analysis of a turbulent sonic jet from a two-dimensional convergent nozzle has been carried out using the compressible k-? turbulence model and TVD finite difference scheme. Numerical conditions have been varied over a range of operating pressure ratios from 1.893 to 6.0 which cover the jet flow conditions from correctly expanded to underexpanded. Numerical flow visualization of sonic jet structure using the computer schlieren, a relation between shock cell length in the jet with the operating pressure ratio and the pressure distribution along jet centerline are obtained. Also, a transition process of a two-dimensional sonic jet from correctly expanded to underexpanded conditions is shown in detail and a flow model of jet structure is proposed.

关键词： Sonic nozzle Underexpanded jet Shock cell length κ-ε turbulence model Numerical analysis

Data-Driven Feedback-Feedforward Controller Design from Closed-loop Step Response Data Based on Virtual Reference Feedback Tuning 36

在线全文

学校读者我要写书评

暂无评论

Data-Driven Feedback-Feedforward Controller Design from Clos...

Recycle for Sludge Scrap of Nd-Fe-B Sintered Magnet as Isotropic Bonded Magnet

第36届中国控制会议

作者： Shiro masuda Yoshihiro Matsui Graduate School of System Design Tokyo Metropolitan University

ISBN: (纸本)9781538629185

This paper proposes data-driven feedback-feedforward controller design from closed-loop step response *** proposed method directly tunes feedback controllers based on Virtual Reference Feedback Tuning（VRFT） using closed-loop step response ***,the feedforward controller is designed for disturbance attenuation from measurable *** feedback controller is linearly parametrized with integrator for assuring the asymptotically tracking to the step-type reference signal,and the feedforward controller is a parametrized rational transfer *** optimal prefilter design are provided for the both feedback and feedforward *** effectiveness of the proposed method is illustrated through a numerical example.

关键词： data-driven tuning VRFT feedback-feedforward controllers disturbance attenuation

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

Journal of Rare Earths 2004年第1期22卷 168-171页

作者： Masahiro Itoh Masahiro masuda Shunji Suzuki Ken-ichi Machida Collaborative Research Center for Advanced Science and Technology Collaborative Research Center for Advanced Science and TechnologyCollaborative Research Center for Advanced Science and TechnologyCollaborative Research Center for Advanced Science and Technology Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Osaka University 2-1 Yamadaoka Suita Osaka 565-0871

The reduction diffusion method was performed for the sludge scrap of Nd-Fe-B sintered magnets with adding Ca metal to recover the oxidized Nd-Fe-B phase. After washing the resultant powders to remove Ca metal component, the powders obtained were recycled as an isotropic magnetic powder by the melt spinning method. The magnetic properties of powders as recycled were inferior, especially for the coercivity value, due to the deletion of rare earth metals during the washing process. The adjustment of metal composition, i.e., the addition of Nd metal, at the melt spinning process improved the magnetic properties to be B r=～0.75 T, H cj=～0.93 mA·m -1, and (BH) max=～91 kJ·m -3. The magnetic properties of the bonded magnets prepared from the composition-adjusted powders were B r=～0.66 T, H cj=～0.92 mA·m -1, and (BH) max=～70 kJ·m -3, which are approximately comparable to the commercially available MQPB boned one (B r=～0.73 T, H cj=～0.79 mA·m -1, and (BH) max=～86 kJ·m -3).

关键词： Nd-Fe-B sintered magnet recycling isotropic Nd-Fe-B bonded magnet melt-spinning method sludge scrap rare earths

Inverse correlation between CD8^+ inflammatory cells and E-cadherin expression in gallbladder cancer:Tissue microarray and imaging analysis

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2017年第1期5卷 1-8页

作者： Keita Kai Masanori masuda Shinichi Aishima Department of Pathology Saga University Hospital Department of Pathology and Microbiology Saga University Faculty of Medicine

AIM To investigated the association between the tumor cells' expression of E-cadherin and the numbers of several types of inflammatory cells infiltrating into the invasive portion of gallbladder cancer(GBC).METHODS We analyzed 50 GBC cases for which a sufficient amount of tumor tissues for tissue microarray(TMA) had been saved. Three tissue cores(3.0 mm) of invasive lesion from each case were used for the TMA. The 4-μm cut sections on slides were immunostained using primary antibodies including E-cadherin for cancer cells, leukocyte common antigen for leukocyte, myeloperoxidase for neutrophils, CD3 for T cells, CD4 for helper T cells, CD8 for killer T cells, CD20 for B cells and CD68 for macrophages. The immunostained slides were digitally analyzed by imaging analysis *** A significant inverse correlation between the number of infiltrating CD8^+ cells at invasive areas and the expression of E-cadherin by cancer cells was observed(P = 0.0001), although the degree of this correlation was relatively weak(R = 0.32). The number of CD8^+ cells and the cancer cells' E-cadherin expression were also significantly correlated with tumor differentiation(welldifferentiated vs poorly differentiated)(P = 0.0467 and P = 0.0294, respectively). Inverse correlation of T-stageand the number of CD8^+ cell infiltration was observed with statistical significance in comparison of T2 and T3 cases(P = 0.0324).CONCLUSION Our findings indicate an inverse correlation of CD8^+ T cell infiltration and cancer cells' E-cadherin expression at invasive areas of GBC. Further analyses are essential to test these findings.

关键词： E-cadherin Inflammation CD8 Gallbladder cancer Tissue microarray

Nondestructive and active interrogation system for special nuclear material:proof of principle and initial results

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

Nuclear Science and Techniques 2024年第5期35卷 216-225页

作者： Mahmoud Bakr Kai masuda Yoshiyuki Takahashi Tsuyoshi Misawa Norio Yamakawa Tomas Scott Institute of Advanced Energy Kyoto UniversityGokashoUjiKyoto 611‑0011Japan School of Physics University of BristolBs81TL Tyndall AvenueBristolUK Physics Department Faculty of ScienceAssiut UniversityAssiut 71516Egypt Research Reactor Institute Kyoto University2 Asashiro‑NishiKumatoriOsaka 590‑0494Japan Pony Industry Co.Ltd. 2‑3‑6 Kitakyuhoji‑MachiChuo‑KuOsaka 541‑0057Japan Astral Neutronics LTD Unit H5HallenBristol BS107SBUK

Herein,we employ the threshold energy neutron analysis(TENA)technique to introduce the world's first active interrogation system to detect special nuclear materials(SNMs),including U-235 and *** system utilizes a DD neutron generator based on inertial electrostatic confinement(IEC)to interrogate suspicious *** detect secondary neutrons produced during fission reactions induced in SNMs,a tensioned metastable fluid detector(TMFD)is *** current status of the system's development is reported in this paper,accompanied by the results from experiments conducted to detect 10 g of highly enriched uranium(HEU).Notably,the experimental findings demonstrate a distinct difference in the count rates of measurements with and without *** difference in count rates surpasses two times the standard deviation,indicating a confidence level of more than 96% for identifying the presence of *** paper presents and extensively discusses the proof-of-principle experimental results,along with the system's planned trajectory.

关键词： Special nuclear materials Uranium detection Inertial electrostatic confinement fusion TENA HEU CTMFD