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Databook on Fatigue Strength of Metallic Materials

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Journal of Materials Science & technology 1998年第2期14卷 191-192页

作者： K.Shiozawa toyama t.sakai Shiga

Using LiF crystals for high-performance neutron imaging with micron-scale resolution

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High Power Laser Science and Engineering 2015年第4期3卷 1-9页

作者： A.Faenov M.Matsubayashi t.Pikuz Y.Fukuda M.Kando R.Yasuda H.Iikura t.Nojima t.sakai M.Shiozawa R.Kodama Y.Kato Institute for Academic Initiatives Suita Osaka University Joint Institute for High temperatures Russian Academy of Sciences Quantum Beam Science Center Japan Atomic Energy Agency PPC and Graduate School of Engineering Suita Osaka University Nippon SOKEN Inc. the Graduate School for the Creation of New Photonics Industries

this paper describes an overview of our recent discovery – clear demonstration that Li F crystals can be efficiently used as a high-performance neutron imaging detector based on optically stimulated luminescence of color centers generated by neutron irradiation. It is shown that the neutron images we have obtained are almost free from granular noise, have a spatial resolution of～5.4 μm and a linear response with a dynamic range of at least 103. the high contrast and good sensitivity of Li F crystals allow us to distinguish two holes with less than 2% transmittance difference. We propose to use such detectors in areas where high spatial resolution with high image gradation resolution is needed, including diagnostics of different plasma sources such as laser and z-pinch produced plasmas.

关键词： color centers Li F crystals neutron imaging neutrons plasma diagnostics

Development of an Automatic Gain Controller Card for Next Generation EDFAs

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光学学报 2003年第S1期23卷 413-414页

作者： C. Y. Liaw t. H. Cheng C. Lu M.Akiyama t.sakai A.Wada Institute for Infocomm Research Unit 230 Innovation Centre Block 2 18 Nanyang Drive Singapore 639798 Fujikura technology Singapore 41 Science Park Road #01-03 Singapore 117610 Fujikura Ltd 1440 Mutsuzaki Sakura Chiba 285-8550 Japan

this paper describes a low cost automatic gain controller card that provides fast transient gain control to maintain the power of the surviving channels when the number of input channels to an erbium-doped fiber ampli... 详细信息

关键词： fiber amplifier gain control low cost

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台阶电极晶体管(SEt)

微纳电子技术 1978年第2期 36-40页

作者： t.sakai 王长河林文长

SEt不需要精确的光刻工艺和金属化技术就可以获得良好的性能。在SEt结构中使用砷掺杂多晶硅作为发射极电极部分。这种电极被作成倒置梯形。利用两层多晶硅之间腐蚀速度的不同来形成这种倒置梯形结构。离子注入后用化学腐蚀方法开出基板... 详细信息

SEt不需要精确的光刻工艺和金属化技术就可以获得良好的性能。在SEt结构中使用砷掺杂多晶硅作为发射极电极部分。这种电极被作成倒置梯形。利用两层多晶硅之间腐蚀速度的不同来形成这种倒置梯形结构。离子注入后用化学腐蚀方法开出基板接触窗口。发射极扩散层和基极接触之间的间距为0.4微米或更小。 |S;|的截止频率约为8.4千兆赫,比相同发射极尺寸的通常的平面晶体管的截止频率高2千兆赫。集成的SEt的上升时间为150微微秒。

关键词：发射极扩散层表面层半导体三极管晶体管基极 SEt

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用动测法预测桩的承载力

土工基础 1992年第A10期6卷 116-122页

作者： N.Kawabata t.sakai S.Kondo H.Kanai Y.Kobayashi t.Oki S.Nishimura 林晓玲

本文介绍一种根据应力波理论预测桩的动承载力的新方法。有关测量桩侧及极端阻力的应用方法及理论根据也分别予以讨论。虽然CASE法和CAFWAP分析法已广泛应用于预测桩的承载力,但并未考虑桩的频率特牲。由于锤击力的频率和桩的反射波频... 详细信息

本文介绍一种根据应力波理论预测桩的动承载力的新方法。有关测量桩侧及极端阻力的应用方法及理论根据也分别予以讨论。虽然CASE法和CAFWAP分析法已广泛应用于预测桩的承载力,但并未考虑桩的频率特牲。由于锤击力的频率和桩的反射波频率彼此存在很大的差异,在打桩过程中用CASE法难以预测土的阻力。将桩的响应频率低的同样测量频率用于入射波和反射波,以预测打桩时上的阻力。结果发现,本文所述方法与CAPWAP分析法预测的承载力几乎相等。

关键词：桩承载力动力测法

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根据应力波原理估测灌注桩形状的方法

土工基础 1992年第A10期6卷 108-115页

作者： M.Honma t.sakai H.Murakumi N.Koyama H.Inagawa t.Miyasaka Y.tanaka 林晓玲

本文介绍了根据应力波原理,在小应变条件下估测灌注桩形状方法的理论及使用结果。从桩的振动响应估测桩的形状,必须同时确定波动能量在桩上传播的衰减率以及产生反射波的桩构件的特征比。考察波的衰减特性曲线,以分析桩的振动响应,估测... 详细信息

本文介绍了根据应力波原理,在小应变条件下估测灌注桩形状方法的理论及使用结果。从桩的振动响应估测桩的形状,必须同时确定波动能量在桩上传播的衰减率以及产生反射波的桩构件的特征比。考察波的衰减特性曲线,以分析桩的振动响应,估测桩的形状。从该法应用于灌注桩的试验结果来看,如果对桩的振动响应,包括桩尖的反应形式仔细地进行分析,桩形估测中桩径误差为10～20％,桩长误差小于10％。

关键词：灌注桩形状应力波测量

Recrystallization behaviour of fine-grained magnesium alloy after hot deformation

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中国有色金属学会会刊：英文版 2007年第6期17卷 1139-1142页

作者：杨续跃 H. Miura t. sakai School of Materials Science and Engineering Central South University Department of Mechanical Engineering and Intell igent Systems UEC Tokyo Tokyo 182-8585 Japan Department of Mechanical Engineering and Intell igent Systems UEC Tokyo Tokyo 182-8585 JapanYANGXu-yue

Annealing behaviors of hot-deformed magnesium alloy AZ31 were studied at temperatures from 300 to 673 K by optical and SEM/EBSD metallographic observation. temperature dependence of the average grain size(D) is categorized into three temperature regions, i.e. an incubation period for grain growth, rapid grain coarsening, and normal grain growth. the number of fine grains per unit area, however, is reduced remarkably even in incubation period. this leads to grain coarsening taking place continuously in the whole temperature regions. In contrast, the deformation texture scarcely changes even after full annealing at high temperatures. It is concluded that the annealing processes operating in hot-deformed magnesium alloy with continuous dynamic recrystallized grain structures can be mainly controlled by grain coarsening accompanied with no texture change, that is, continuous static recrystallization.

关键词：镁合金退火连续再结晶晶体生长纹理

Dynamic recrystallization and texture development during hot deformation of magnesium alloy AZ31

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中国有色金属学会会刊：英文版 2009年第1期19卷 55-60页

作者：杨续跃吉泽升 H. MIURA t. sakai School of Materials Science and Engineering Central South University Key Laboratory of Nonferrous Metal Materials Science and Engineering Ministry of Education Central South University College of Materials Science and Engineering Harbin University of Science and Technology Department of Mechanical Engineering and Intelligent Systems UEC Tokyo Tokyo 182-8585 Japan

the dynamic recrystallization(DRX) and texture development, taking place during hot deformation of magnesium alloy AZ31 with a strong wire texture, were studied in compression at 673 K (0.73 tm). two kinds of samples were machined parallelly to the extruded and transverse directions of Mg alloy rods. New fine grains are evolved at original grain boundaries corrugated at low strains and develop rapidly in the medium range of strain, finally leading to a roughly full evolution of equiaxial fine grains. Kink bands are evolved at grain boundaries corrugated and also frequently in grain interiors at low strains. the boundary misorientations of kink band increase rapidly with increasing strain and approach a saturation value in high strain. the average size of the regions fragmented by kink band is almost the same as that of new grains evolved in high strain. these characteristics of new grain evolution process are not changed by the orientation of the samples, while the flow behaviors clearly depend on it. It is concluded that new grain evolution can be controlled by a deformation-induced continuous reaction, i.e. continuous dynamic recrystallization(DRX). the latter is discussed by comparing with conventional, i.e. discontinuous DRX.

关键词：镁合金 AZ31合金连续动态热处理

Application of tungsten as a De-NO_x Catalyst

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Rare Metals 1994年第3期13卷 229-235页

作者： Nakatsuji t.(sakai Chemical Industry, Co. , LId. 5-I, Ebisujimacho sakai Osako 590, Japan) sakai Chemical Industry Co 日本

Abstract A catalyst for removal of nitrogen oxides, in stationary Sources, requires many kinds of characteristicsfor commercial application. At first, a vanadium pentaoxide based catalyst was used for the NO-NH3-OZreaction because of its high activity at lower temperatures. But it was`later found that this catalyst had *** like a low thermal durability and a high conversion rate of SO: to SO3. On the other hand, tungstentrioxide was well known as a catalyst that has a high thermal durability and a low conversion rate of SOZto SO3 but showed a low activity at appropriate temperature. For these reasons, tungsten trioxide basedcatalysts have not been used in the reaction in most actual plants except for special cases. Further *** on this catalyst revealed that a catalyst comprising of titania f80 wt%￣ 90 wt%j- tungsten trioxide(5 wt% ￣ 15 wt%j, and vanadium pentaoxide (0,l wt%￣ 5 wt%j, showed a high thermal durability and alow conversion rate of SOZ to SO3 as well as high activity towards the NO-NHrOz reaction.

关键词： NO De