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Advances in manufacturing 2019年第4期7卷 411-422页

作者： m.Kimura S.Iwamoto m.Kusaka K.Kaizu Y.Nakatani m.takahashi Department of mechanical Engineering Graduate School of EngineeringUniversity of Hyogo2167 ShoshaHimejiHyogo 671-2280Japan Toshiba Energy Systems&Solutions Corporation 2-4 Suehiro-choTsurumi-kuYokohamaKanagawa 230-0045Japan Department of mechanical Engineering Faculty of EngineeringNishinippon Institute of Technology1-11 NiitsuKanda-machiMiyako-gunFukuoka 800-0394Japan

The groove shape of the weld faying part was investigated to obtain an ideal pipe frictiowelded joint that had a fracture in the base metal and no inner flash of *** steel pipe had inner and outer diameters of 8.0 mm and 13.5 mm,respectively,and the weld faying surface was of a basic flat shape(butt)***,stepped and tapered groove shapes were *** groove shapes were welded with a friction speed of 27.5 s_1 and a friction load of 2.79 *** phenomena during the welding process were observed,and the tensile strength of joints was *** joints,that fabricated with flat or step groove shapes,made with a friction time at which the friction torque reached the initial peak did not have the tensile strength of the base metal nor a fracture in the base ***,the joints fabricated with a friction time that reached past the initial peak had a large flash,and they contained a fracture in the base *** contrast,when joints were made with a gently tapered groove shape with a friction time reaching the time of the initial peak,they achieved a fracture in the base metal,despite having an extremely small inner ***,the shape at the weld faying part was capable of reducing the flash exhausted from the weld interface.

关键词： Friction welding Steel pipe Inner flash Groove shape Taper Joint strength Fracture

Optimization of Cu content for the development of high-performance T5-treated thixo-cast Al-7Si-0.5mg-Cu(wt.%)alloy

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Journal of materials Science & Technology 2021年第34期93卷 178-190页

作者： K.Yamamoto m.takahashi Y.Kamikubo Y.Sugiura S.Iwasawa T.Nakata S.Kamado Nagaoka University of Technology NagaokaJapan Asanuma Giken Co. Ltd.HamamatsuJapa Industrial Research Institute of Shizuoka Prefecture ShizuokaJapan

Cu content has been successfully optimized in a thixo-cast and directly aged(T5-treatment)Al-7 Si-0.5 mg(wt.%)*** after the 0.5%Cu addition,plate-like Al_(2)Cu(θ’)phases,which contribute to high strengths and large plasticity,are *** formation of a large fraction of Cu-containing brittle phases could be suppressed as ***,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%,*** 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.

关键词： Al-Si-mg-Cu alloy Thixo-casting T5-treatment mechanical property microstructure

EFFECT OF FIELD-INDUCED mAGNETIC ANISOTROPY

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Science China mathematics 1986年第6期 619-630页

作者：金汉民,I.OKAmOTO,m.takahashi Department of Physics Jilin University Changchun Department of Aplied Physics Tohoku University Sendai Japan Department of Aplied Physics Tohoku University Sendai Japan

It is discovered by using a torque magnetometer that a magnetic anisotropy is induced in classical spin glasses Cumn and Agmn at low temperature only by applying a magnetic field higher than a critical value. The anisotropy is mainly unidirectional with a relatively small part of a uniaxial one. The field-cooled-induced magnetic anisotropy is in essential that of field-induced in these alloys though they are different quantitatively. The effect of field-induced magnetic anisotropy is not observed in Comn and Nimn alloys which also have the effect of field-cooledin-dueed magnetic *** typical characteristics of the field-induced magnetic anisotropy are presented.

关键词： EFFECT OF FIELD-INDUCED mAGNETIC ANISOTROPY than

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日本神户地震前的地下水氡异常

世界地震译丛 1995年第6期26卷 71-72页

作者： G.Igarashi S.Saeki N.Takahata K.Sumikawa S.Tasaka Y.Sasaki m.takahashi Y.Sano 吕春来国家地震局地球物理研究所

在1995年1月17日兵库县南部(神户)地震之前数个月,地下水中的氡浓度增加了。从1994年10月下旬观测开始,到1994年12月底,氡浓度增加了约4倍。在1月8日,即神户地震前9天,氡浓度在开始降低前达到比观测开始时高10倍多的一个峰值。这些氡值... 详细信息

在1995年1月17日兵库县南部(神户)地震之前数个月,地下水中的氡浓度增加了。从1994年10月下旬观测开始,到1994年12月底,氡浓度增加了约4倍。在1月8日,即神户地震前9天,氡浓度在开始降低前达到比观测开始时高10倍多的一个峰值。这些氡值变化可能是这次灾难性地震的前兆现象。

关键词：地震前兆地下水氡异常

肝内微泡聚集形成的信号强度对鉴别特发性门静脉高压与肝硬化的作用

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国际医学放射学杂志 2009年第5期32卷 502-503页

作者： H.maruyama H.Ishibashi m.takahashi F.Imazeki O.Yokosuka 唐光健 Department of medicine and Clinical Oncology Chiba University Graduate School of Medicine1-8-1InohanaChuou-kuChiba 260-8670Japan

目的研究使用对比剂一增强超声（US）鉴别特发性门静脉高压（IPH）与肝硬化的可能性。材料与方法本研究得到学术委员会批准并取得书面知情同意书。23例[平均年龄（60±11）岁，37-85岁1活检证实的肝硬化病人与10例[平均年龄（65±8）岁... 详细信息

目的研究使用对比剂一增强超声（US）鉴别特发性门静脉高压（IPH）与肝硬化的可能性。材料与方法本研究得到学术委员会批准并取得书面知情同意书。23例[平均年龄（60±11）岁，37-85岁1活检证实的肝硬化病人与10例[平均年龄（65±8）岁，51～78）岁]IPH病人被纳入研究，27例[平均年龄（46±17）岁，26～82岁1无任何肝局灶性病变或门静脉血栓的病人作为对照。

关键词：肝硬化病人门静脉高压特发性信号强度鉴别聚集微泡肝内

mR扩散加权成像评价肾纤维化:单侧输尿管梗阻鼠模型研究

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国际医学放射学杂志 2010年第4期 382-383页

作者： O.Togao S.Doi m.Kuro-o T.masaki N.Yorioka m.takahashi 李宁 the Advanced Imaging Research Center UT Southwestern Medical Center2201 Inwood RdDallasTX 75390-8542Japan

目的利用mR成像对单侧输尿管梗阻(UUO)鼠模型进行检测,评价表观扩散系数(ADC)是否随肾纤维化进展而改变及其与肾纤维化的病理组织学变化的相关性。材料与方法该研究经动

关键词：加权成像 ADC 肾纤维化输尿管梗阻 mR 鼠模型单侧

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肝纤维化分级肝内微泡聚集的超声显示

国际医学放射学杂志 2012年第4期 397-397页

作者： H. Ishibashi H. maruyama m.takahashi T. Shimada H. Kamesaki K. Fujiwara 唐光健 Department of medicine and Clinical Oncology Chiba University Graduate School of Medicine1 -8 -1 Inohana Chuou -ku Chiba 260-8670 Japan

摘要目的评价基于氟正丁烷增强的超声对肝纤维化分级的可行性。方法202例病人被纳入此项前瞻性研究,包括主研究(对照33例;F0-1:35例;F2:26例;F3:23例;肝硬化:29例)与后续研究(对照:16例;F0-1:7例;F2:20例;F3:7例;肝硬化:6例)。对照增强... 详细信息

摘要目的评价基于氟正丁烷增强的超声对肝纤维化分级的可行性。方法202例病人被纳入此项前瞻性研究,包括主研究(对照33例;F0-1:35例;F2:26例;F3:23例;肝硬化:29例)与后续研究(对照:16例;F0-1:7例;F2:20例;F3:7例;肝硬化:6例)。对照增强表现与FIB4[年龄×AST/(血小板计数×ALT0.5)]对纤

关键词：肝脏纤维化硬化超声对比剂

脾循环的影响:利用微泡对比剂无创性评估门静脉血流动力学

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国际医学放射学杂志 2015年第3期 293-293页

作者： T.Shimada H.maruyama T.Kondo T.Sekimoto m.takahashi O.Yokosuka 战锟 Department of Gastroenterology and Nephrology Chiba University Graduate School of Medicine1-8-1 Inohana Chuou-kuChiba 260-8670Japan

目的利用微泡对比剂监测脾循环,进而评估门静脉高压的严重程度。方法前瞻性研究91例病人[年龄30～86岁,平均(63.0±12.6)岁;男60例,女31例],其中肝硬化62

关键词：无创性微泡肝硬化组对比剂

Fabrication of independent nickel microstructures with anodizing of aluminum, laser irradiation, and electrodeposition

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Journal of University of Science and Technology Beijing 2003年第3期10卷 39-42页

作者： T.Kikuchi m.Sakairi H.takahashi Graduate School of Engineering Hokkaido UniversitySapporo 060-8628JapanGraduate School of EngineeringHokkaido UniversitySapporo 060-8628JapanGraduate School of EngineeringHokkaido UniversitySapporo 060-8628Japan

Independent microstructures made of Ni metal were fabricated by fivesequential processes: porous anodic oxide film formation, pore sealing, laser irradiation, Nielectroplating, and removal of the aluminum substrate and anodic oxide films. Aluminum plates androds were anodized in an oxalic acid solution to form porous type anodic oxide films, and thenimmersed in boiling distilled water for pore sealing. The anodized and pore-sealed specimens wereirradiated with a pulsed neodymium-doped yttrium aluminum garnet (Nd-YAG) laser beam in a Ni platingsolution to remove anodic oxide film locally by rotating and moving up I down with anXYZ(theta)-stage. Nickel was deposited at the area where film had been removed by cathodicpolarization in the solution before removing the aluminum substrate and anodic oxide films in NaOHsolutions. Cylindrical or plain network structures were fabricated successfully.

关键词： anodize laser irradiation nickel metal electrodeposition

Short-fetch high waves during the passage of 2019 Typhoon Faxai over Tokyo Bay

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Frontiers of Earth Science 2022年第1期16卷 206-219页

作者： Hiroshi TAKAGI Atsuhei takahashi School of Environment and Society Tokyo Institute of TechnologyTokyo 152-8550Japan

The risk of wind waves in a bay is often overlooked,owing to the belief that peninsulas and islands will inhibit high ***,during the passage of a tropical cyclone,a semi-enclosed bay is exposed to twodirectional waves:one generated inside the bay and the other propagated from the outer *** Faxai in 2019 resulted in the worst coastal disaster in Tokyo Bay in the last few *** authors conducted a post-disaster survey immediately after this *** modeling was also performed to reveal the mechanisms of unusual high *** significant high-wave damage occurred on coasts facing the Pacific *** contrast,Fukuura-Yokohama,which faces Tokyo Bay,suffered overtopping waves that collapsed *** precisely reproduce multi-directional waves,the authors developed an extended parametric typhoon model,which was embedded in the JmA mesoscale meteorological model(JmA-mSm).The peak wave height was estimated to be 3.4 m off the coast of Fukuura,in which the contribution of the outer-sea waves was as low as 10%–20%.A fetchlimited wave developed over a short distance in the bay is considered the primary mechanism of the high *** maximum wave occurred on the left-hand side of the typhoon track in the bay,which appears to be contrary to the common understanding that it is safer within the semicircle of a storm than on the opposite *** Faxai was a small typhoon;however,if the radius was tripled,it is estimated that the wave height would exceed 3 m over the entire bay and surpass 4 m off the coasts of Yokohama and Chiba.

关键词： Typhoon Faxai Tokyo Bay high waves short fetch overtopping wave hindcasting parametric typhoon JmA-mSm storm surge