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Improvement in the mechanical properties of Al/SiC nanocomposites fabricated by severe plastic deformation and friction stir processing

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International Journal of Minerals,Metallurgy and Materials 2017年第3期24卷 297-308页

作者： M.Sarkari Khorrami M.Kazeminezhad y.miyashita A.H.Kokabi Department of Materials Science and Engineering Sharif University of Technology Department of Mechanical Engineering Nagaoka University of Technology

Severely deformed aluminum sheets were processed by friction stir processing(FSP) with Si C nanoparticles under different conditions to improve the mechanical properties of both the stir zone and the heat affected zone(HAZ).In the case of using a simple probe and the same rotational direction(RD) of the FSP tool between passes,at least three FSP passes were required to obtain the appropriate distribution of ***,after three FSP passes,fracture occurred outward from the stir zone during transverse tensile tests;thus,the strength of the specimen was significantly lower than that of the severely deformed base material because of the softening phenomenon in the *** improve the mechanical properties of the HAZ,we investigated the possibility of achieving an appropriate distribution of nanoparticles using fewer FSP *** results indicated that using the threaded probe and changing the RD of the FSP tool between the passes effectively shattered the clusters of nanoparticles and led to an acceptable distribution of Si C nanoparticles after two FSP *** these cases,fracture occurred at the HAZ with higher strength compared to the specimen processed using three FSP passes with the same RD between the passes and with the simple *** fracture behaviors of the processed specimens are discussed in detail.

关键词： friction stir processing plastic deformation aluminum silicon carbide nanocomposites mechanical properties

Application of neural networks and ultraviolet spectroscopy to simultaneous determination of multiple vitamins

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Chinese Science Bulletin 1996年第18期41卷 1582-1584页

作者：李志良曾鸽鸣王树信李梦龙 H.yoshida y.miyashita S.Sasaki Department of Chemistry and Chemical Engineering Institute of Chemometrics and Pharmacology Hunan University Changsha 410082China Department of Chemistry and Chemical Engineering Institute of Chemometrics and Pharmacology Hunan University Changsha 410082 China Department of Knowledge-based Inforlnation Engineering Laboratory of Chemical Information Science Toyohashi University of Technology Toyohashi 441 Japan

Multivariate analysis and filtering techniques are widely applied to simultaneous and/or selective determination of multicomponent systems. Many methods among them are based on the principle of linear addition, while this principle does not always hold due to various physical and chemical factors. Using quite a different way, neural network (NN) based on a given learning rule, such as back propagation (BP) model, needs neither knowing nor using any form of input/output relationship. Particularly, NN can resolve various problems such as those with casual relation, those with fuzzy backgrounds, and those with uncertain inferential processes. NN was used by us to investigate quantitative struc-

关键词： NN Application of neural networks and ultraviolet spectroscopy to simultaneous determination of multiple vitamins

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高温下交联聚乙烯中微孔的形成

电线电缆 1986年第6期 40-44页

作者： y miyashita 韦华达

目前,由于交联聚乙烯(XLPE)绝缘电缆易于敷设、价格实惠,被广泛地使用于超高压地下电力传输线路中。在进行接头时,XLPE电缆有时会瞬间处在超过150℃的高温中。研究XLPE在此高温条件下的稳定性时,发现在一些XLPE中形成大量微孔。本文阐... 详细信息

目前,由于交联聚乙烯(XLPE)绝缘电缆易于敷设、价格实惠,被广泛地使用于超高压地下电力传输线路中。在进行接头时,XLPE电缆有时会瞬间处在超过150℃的高温中。研究XLPE在此高温条件下的稳定性时,发现在一些XLPE中形成大量微孔。本文阐述了这种非正常的微孔在厚层绝缘中的形成机理。

关键词： XLPE 水含量 MFR 扩散速率分解产物电缆交联聚乙烯高温下微孔枯醇

无铅钎料96.5Sn-3.5Pb的疲劳断裂行为

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无铅钎料96.5Sn-3.5Pb的疲劳断裂行为

频率对无铅软钎料96.5Sn-3.5Ag的LCF行为的影响

2004中国电子制造技术论坛

作者： y.miyashita y.Mutoh Department of mechanical Engeering Nogaoka University of Technology

96.5Sn-3.5Ag钎料的疲劳断裂实验以频率0.1-10Hz,应力比从0.1-0.7的范围内进行试验。在低应力比和高频的情况下(R=0.1和0.3在10Hz,R=0.1在1Hz),疲劳裂纹在测试试件内部以穿晶的形式传播,疲劳裂纹的生长依赖于循环次数。在高应力比(R≧0... 详细信息

96.5Sn-3.5Ag钎料的疲劳断裂实验以频率0.1-10Hz,应力比从0.1-0.7的范围内进行试验。在低应力比和高频的情况下(R=0.1和0.3在10Hz,R=0.1在1Hz),疲劳裂纹在测试试件内部以穿晶的形式传播,疲劳裂纹的生长依赖于循环次数。在高应力比(R≧0.5)和低频率(f=0.1Hz)时,疲劳裂纹以沿晶的形式传播,裂纹生长行为主要依赖于时间。在材料中形成不规则的Sn的共晶组织与片状的AgSn金属间化合物。片状的AgSn金属间化合物起着强化相的作用,提高了对依赖于循环次数的穿晶裂纹生长抗力,但对于依赖于时间的沿晶裂纹的生长抗力无明显的影响。在疲劳裂纹生长测试的过程中会观察到在Sn基体上小晶粒的生成,这是Sn基体多边化的结果。

关键词：钎料无铅疲劳裂纹的生长应力比断裂途径蠕变作用

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频率对无铅软钎料96.5Sn-3.5Ag的LCF行为的影响

2004中国电子制造技术论坛

作者： C.Kanchanomai y.miyashita y.Mutoh S.L.Mannan Department of Mechanical Engineering Nagaoka University of Technology Indira Gandhi Centre for Atomic Research Chennai

在温度为20℃的非接触应变控制系统中采用不同的频率(10-3-1Hz)对铸态共晶钎料(96.5Sn—3.5Ag)进行了LCF测试。LCF行为在试验所选频率范围内符合Coffin—Manson公式。试验中发现频率可以影响疲劳韧性系数。频率修正Coffin—Manson模型... 详细信息

在温度为20℃的非接触应变控制系统中采用不同的频率(10-3-1Hz)对铸态共晶钎料(96.5Sn—3.5Ag)进行了LCF测试。LCF行为在试验所选频率范围内符合Coffin—Manson公式。试验中发现频率可以影响疲劳韧性系数。频率修正Coffin—Manson模型可以成功的描述频率对疲劳行为的影响。在LCF测试试验中,微观裂纹初始发生在Sn元素富集树枝状结晶边界上的台阶(steps)处,然而在HCF测试试验中,微观裂纹初始发生在Sn元素富集树枝晶形成的亚晶粒边界处。这些微观裂纹的接合、扩展既有穿晶通过Sn—Ag共晶相区的,又有沿晶通过Sn元素富集树枝晶晶界和/或亚晶界的。研究认为多边化过程是促使这种小晶粒形成的原因。

关键词： LCF 裂纹萌生裂纹扩展亚晶粒无铅软钎料 96.5Sn/3.5Ag 树枝晶

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慢性养鸟者肺(慢性BFL)的临床特征

中华结核和呼吸杂志 1997年第Z1期20卷 113-113页

作者： Chtani y Hisauchi K Sumi y miyashita y InoueT Miyake S Miyazaki y yoshizawa 罗新锦(译) FirstDepartmentofInternalMedicine TokyoMedicalandDentalUniversityTokyoJapan

定量构效关系研究中图论方法:路径长度指数P_1与烷烃^(13)C NMR化学位移和CSS

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长沙大学学报 1998年第2期12卷 13-16页

作者：杨南林袁晓燕黄莺胡芳村松由起松本和子李志良湖南大学化学化工系长沙410082 长沙大学化学系 410003 湖南中医学院药学分院日本国立科技大学工学院日本早稻田大学理学院

系统研究了图论方法在定量构效(性)关系(QSAR/QSPR)中的应用,研究了一种路径长度新的指数P_1,并发现它与烷烃^(13)CNMR化学位移和有良好线性相关性。

关键词：定量构效关系图论路径长度 NMR 化学位移烷烃

Primary biliary cirrhosis after aortoiliac reconstruction surgery using a y-graft: A case report

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World Journal of Gastroenterology 2005年第39期11卷 6219-6220页

作者： Tomoko Inoue Katsuya Shiraki Hiroyuki Fuke yutaka yamanaka Kazumi miyashita Keiichi Ito Masahiro Suzuki Kazushi Sugimoto Kazumoto Murata Takeshi Nakano First Department of Internal Medicine Mie University School of Medicine 2-174 EdobashiTsuMie 514-8507Japan

Primary biliary cirrhosis (PBC) is an autoimmune disease characterized by anti-mitochondrial antibodies and destruction of intra-hepatic bile ducts. Though little is known about the etiology of PBC, some reports suggest that xenobiotics and viral infections may induce PBC. We describe a case of PBC after the aortoiliac reconstruction surgery using a y-graft.

关键词： Gall bladder cancer Metastasis Metastatic cardiac tumor

Dietary Effect of Squalene on Lipid Metabolism of Obese/Diabetes KK-<i>A<sup>y</sup></i>Mice and Wild-Type C57BL/6J Mice

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Food and Nutrition Sciences 2018年第12期9卷 1498-1513页

作者： Shaokai Liu Masashi Hosokawa Kazuo miyashita Faculty of Fisheries Sciences Hokkaido University Hakodate Japan

The purpose of this study was to evaluate the influence of squalene (SQ) on plasma and hepatic lipid levels of obese/diabetic KK-Ay mice and wild-type C57BL/6J mice. SQ supplementation significantly increased the HDL cholesterol of KK-Ay mice, which was paralleled with no significant difference in the total and non-HDL cholesterol levels. The increase in HDL cholesterol was also found in the plasma of normal C57BL/6J mice, but the difference was not significant. SQ administration significantly increased neutral lipids (NL) in the liver of KK-Ay mice, while no significant difference was observed in the polar lipids and the total cholesterol levels. The increase in NL was primarily due to the increase in TAG. However, the cholesterol level significantly increased due to SQ intake in the liver of C57BL/6J mice, while no significant difference was found in other lipid levels. The present study suggests that SQ may effectively increase HDL cholesterol level, an important anti-atherosclerotic factor, especially in subjects with metabolic disorders.

关键词： Squalene KK-Ay Mice C57BL/6J Mice HDL Cholesterol Atherosclerosis