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| 1 | Effect of vanadium and chromium on the microstructural features of V–Cr–Mn–Ni spheroidal carbide cast irons显示文摘The objective of this investigation is to study the influence of vanadium(5.0wt%–10.0wt%) and chromium(0–9.0wt%) on the microstructure and hardness of Cr?V?Mn?Ni white cast irons with spheroidal vanadium carbides. The alloys' microstructural features are presented and discussed with regard to the distribution of phase elements. The structural constituents of the alloys are spheroidal VC, proeutectoid cementite, ledeburite eutectic, rosette-shaped carbide eutectic(based on M7C3), pearlite, martensite, and austenite. Their combinations and area fraction(AF) ratios are reported to be influenced by the alloys' chemical composition. Spheroidized VC particles are found to be sites for the nucleation of carbide eutectics. Cr and V are shown to substitute each other in the VC and M7C3 carbides, respectively. Chromium alloying leads to the formation of a eutectic(?-Fe + М7С3), preventing the appearance of proeutectoid cementite in the structure. Vanadium and chromium are revealed to increase the total carbide fraction and the amount of austenite in the matrix. Cr is observed to play a key role in controlling the metallic matrix microstructure. | V.G.Efremenko K.Shimizu A.P.Cheiliakh T.V.Kozarevskaya K.Kusumoto K.Yamamoto | 2014 | International Journal of Minerals,Metallurgy and Materials2014，21，11： | 2 |
| 2 | Meta‐analysis: interferon‐alpha prevents the recurrence after curative treatment of hepatitis C virus‐related hepatocellular carcinoma显示文摘 | Y.Miyake A.Takaki Y.Iwasaki K.Yamamoto | 2010 | Journal of Viral Hepatitis2010，，4： | 2 |
| 3 | High frequency of circulating HBcAg‐specific CD8 T cells in hepatitis B infection: a flow cytometric analysis显示文摘 | S.Matsumura K.Yamamoto N.Shimada N.Okano R.Okamoto T.Suzuki T.Hakoda M.Mizuno T.Higashi T.Tsuji | 2001 | Clinical & Experimental Immunology2001，，3： | 1 |
| 4 | Myocardial infarction and cerebrovascular accident following non‐cardiac surgery: differences in postoperative temporal distribution and risk factors显示文摘 | M.KIKURA F.OIKAWA K.YAMAMOTO T.IWAMOTO K. A.TANAKA S.SATO G.LANDESBERG | 2008 | Journal of Thrombosis and Haemostasis2008，，5： | 1 |
| 5 | Evolution of prognostic factors in hepatocellular carcinoma in Japan显示文摘 | K.NOUSO Y.KOBAYASHI S.NAKAMURA S.KOBAYASHI J.TOSHIMORI K.KUWAKI H.HAGIHARA H.ONISHI Y.MIYAKE F.IKEDA H.SHIRAHA A.TAKAKI Y.IWASAKI H.KOBASHI K.YAMAMOTO | 2010 | Alimentary Pharmacology & Therapeutics2010，，3： | 1 |
| 6 | Effect of intense sound exposure on cochlear microphonics and whole nerve action potential显示文摘 | Yamamura K.Yamamoto N.Konhyama A Sawada Y Oh-no Saitoh T | | 0，，： | 1 |
| 7 | Optimization of Cu content for the development of high-performance T5-treated thixo-cast Al-7Si-0.5Mg-Cu(wt.%)alloy显示文摘Cu content has been successfully optimized in a thixo-cast and directly aged(T5-treatment)Al-7 Si-0.5 Mg(wt.%)alloy.Even after the 0.5%Cu addition,plate-like Al_(2)Cu(θ’)phases,which contribute to high strengths and large plasticity,are precipitated.The formation of a large fraction of Cu-containing brittle phases could be suppressed as well.Then,the Al-7Si-0.5Mg-0.5Cu alloy exhibits high ultimate tensile strength,0.2%proof stress,and elongation to failure of 296 MPa,209 MPa,and 8.8%,respectively.This results in a high quality index similar to that of solution-treated and subsequently aged(T6-treated)Al-7 Si-Mg alloys.A Cu addition over 1.0%further improves the strengths;however,this leads to poor ductility because of the high fraction of Cu-containing brittle phases. | K.Yamamoto M.Takahashi Y.Kamikubo Y.Sugiura S.Iwasawa T.Nakata S.Kamado | 2021 | Journal of Materials Science & Technology2021，，34： | 1 |
| 8 | NIRS的ECR离子源现状(英文)显示文摘Four ECR ion sources have been operated in National Institute of Radiological Sciences(NIRS). Two ECR ion sources supply various ion species for the Heavy Ion Medical Accelerator in Chiba(HIMAC). The 10GHz NIRS-ECR ion source mainly produces C2+ ions for the heavy-ion therapy.Ions of Si,Ar,Fe,Kr and Xe are usually produced by the 18GHz NIRS-HEC ion source for physical and biological experiments.The other two compact ECR ion sources with all permanent magnet configuration have been developed for the new generation carbon therapy facility.One of these,the Kei-source,is a prototype which has been installed to the NIRS-930 cyclotron for axial injection.The other source,Kei2-source,is a demonstration source and utilized for the new generation Linac.In addition,both Kei sources have been used to study fundamental properties. In this paper,present status of the ion sources and recent developments are reported. | M.Muramatsu A.Kitagawa Y.Iwata K.Yamamoto H.Ogawa S.Hojo Y.Sakamoto T.Honma W.Takasugi M.Wakaisami Y.Yoshida T.Kubo Y.Kato S.Biri A.G.Drentje | 2007 | Chinese Physics C2007，31，S1： | 0 |
| 9 | 直升机的障碍探测毫米波雷达和告警系统显示文摘正在研究的是一种民用直升机的障碍探测和告警系统。红外摄像机和94GHz毫米波(MMW)雷达可作为它的探测器。已经制成一部试验雷达来检测传输特性和障碍探测性能。用94GHz Vivaldi天线来制造小型雷达天线。测试结果已证明该试验FMCW雷达具有令人满意的探测距离和精度。它还证明Vivaldi天线在90~100GHz频率范围内工作良好。 | K.Yamamoto K.Yamada N.Yonemoto 刘克华 季节 | 2004 | 空载雷达2004，，3： | 0 |
| 10 | FLOW OF A VISCOUS FLUID PAST A FLEXIBLE MEMBRANE显示文摘This paper treats the numerical calculation of a steady two-dimensional viscous flow past a flexible membrane. Both edges of the membrane are fixed in the flow and its chord is set normal to the flow. The numerical calculations of the Navier-Stokes equation based on a finite difference method and a relaxation method are carried out for several values of the membrane tension in cases when the Reynolds numbers are 5, 10 and 20. It is found that the membrane tension has a minimum value below which there is no steady shape of the membrane. Two different shapes of the membrane are possible at a given value of tension: the one is of small deformation, while the other a large deformation. There appear twin vortices in the concave region of the membrane shape if its deformation increases to a certain extent. | K.Yamamoto M.Okada J.Kameyama | 1991 | Chinese Journal of Aeronautics1991，6，2： | 0 |
| 11 | High-Accuracy Polishing Technique Using Dwell Time Adjustment显示文摘Two algorithms for dwell time adjustment are evaluated under the same polishing conditions that involve tool and work distributions.Both methods are based on Preston’s hypothesis.The first method is a convolution algorithm based on the Fast Fourier Transform.The second is an iterative method based on a constraint problem,extended from a one-dimensional formulation to address a two-dimensional problem.Both methods are investigated for their computational cost,accuracy,and polishing shapes.The convolution method has high accuracy and high speed.The constraint problem on the other hand is slow even when it requires larger memory and thus is more costly.However,unlike the other case a negative region in the polishing shape is not predicted here.Furthermore,new techniques are devised by combining the two methods. | S.Satake K.Yamamoto S.Igarashi | 2006 | Communications in Computational Physics2006，1，4： | 0 |
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