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A method for predicting critical load evaluating adhesion of coatings in scratch testing

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2003年第6期4卷 88-92页

作者：陈溪芳,严密,杨德人,hirose yukio Dept.of Material Science and Engineering Dept.of Material Science and Engineering Dept.of Material Science and Engineering Dept.of Material Science and Engineering Zhejiang University Hangzhou 310027 China Zhejiang University Hangzhou 310027 China Zhejiang University Hangzhou 310027 China Kanazawa University Kanazawa Japan

In this paper based on the experiment principle of evaluating adhesion property by scratch testing, the peeling mechanism of thin films is discussed by applying contact theory and surface physics theory. A mathematical model predicting the critical load is proposed for calculating critical load as determined by scratch testing. The factors for correctly evaluating adhesion of coatings according to the experimental data are discussed.

关键词： Coating Adhesion Scratch testing Critical load prediction

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含有球形介在物材料的弹性模量

材料工程 1994年第12期22卷 39-46页

作者： yukio hirose Zheng Lin Toshihiko Sasaki(Kanazawa University)

含有球形介在物材料的弹性模量日本金泽大学广懒幸雄，林政，佐佐木敏彦著者利用了等价介在物￣①和矩阵的方法，依据Ｍｏｒｉ－Ｔａｎａｋａ的结论，提出了一个含有椭球形介在物材料的应力－应变的关系式。并利用这个关系式讨论了含有... 详细信息

含有球形介在物材料的弹性模量日本金泽大学广懒幸雄，林政，佐佐木敏彦著者利用了等价介在物￣①和矩阵的方法，依据Ｍｏｒｉ－Ｔａｎａｋａ的结论，提出了一个含有椭球形介在物材料的应力－应变的关系式。并利用这个关系式讨论了含有球形介在物材料的弹性行为，进一步得...

关键词：球形介在物材料弹性模量等价介在物矩阵

Effect of acute oral chlorogenic acid ingestion on the inhibition of blood glucose excursions following glucose to-lerance testing

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Advances in Bioscience and Biotechnology 2013年第3期4卷 364-367页

作者： Shinichi Demura Takayoshi Yamada yukio hirose Kenji Takahashi Faculty of Community Health Care Teikyo Heisei University Ichihara Japan General Education Center Fukui National College of Technology Fukui Japan Graduate School of Natural Science & Technology Kanazawa University Kanazawa Japan

The aim of this study was to examine the inhibitory effect of acute oral chlorogenic acid (CGA) ingestion on increases in blood glucose levels following glucose tolerance testing. Ten healthy male adults (age: 25.9 ± 5.4 years) participated in the study. Blood samples were collected from the antecubital vein of subjects following overnight fasting. After a 120-min rest, they were administered 75 g glucose and chlorogenic acid or placebo. The amount of chlorogenic acid administered (in the form of capsules) to the subjects was 0.1g per body mass. In addition, only capsules were ingested in placebo ingestion conditions. Blood samples were collected 4 times during the 120-min rest period at intervals of 30 min. Serum insulin and plasma glucose levels were analyzed. Serum insulin levels increased significantly at 30 min after glucose ingestion, and fixed until 120 min in both conditions. Plasma glucose level increased significantly at 30 min after glucose ingestion, followed by a slow decrease. In addition, no significant difference was found between the conditions in each parameter. In conclusion, acute oral chlorogenic acid ingestion may not inhibition blood glucose increase following glucose tolerance.

关键词： Chlorogenic Acid Blood Glucose Level Insulin Resistance Glucose Tolerance Test

The thermal conductivity of the Earth's core and implications for its thermal and compositional evolution

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National Science Review 2021年第4期8卷 18-20页

作者： Kenji Ohta Kei hirose Department of Earth and Planetary Sciences Tokyo Institute of Technology Earth-Life Science Institute Tokyo Institute of Technology Department of Earth and Planetary Science The University of Tokyo

The thermal conductivity of iron alloys is a key to understanding the mechanism of convection in the Earth’s liquid core and its thermal history. The Earth’s magnetic field is formed by a dynamo action that requires...

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A novel type of transverse surface wave propagating in a layered structure consisting of a piezoelectric layer attached to an elastic half-space

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Acta Mechanica Sinica 2010年第3期26卷 417-423页

作者： Zhenghua Qian Feng Jin Sohichi hirose Department of Mechanical and Environmental Informatics Tokyo Institute of Technology Tokyo 152-8550 Japan MOE Key Laboratory for Strength and Vibration Xi'an Jiaotong University 710049 Xi'an China

The existence and propagation of transverse surface waves in piezoelectric coupled solids is investigated, in which perfect bonding between a metal/dielectric substrate and a piezoelectric layer of finite-thickness is assumed. Dis- persion equations relating phase velocity to material con- stants for the existence of various modes are obtained in a simple mathematical form for a piezoelectric material of class 6mm. It is discovered and proved by numerical examples in this paper that a novel Bleustein-Gulyaev （B-G） type of transverse surface wave can exist in such piezoelectric cou- pled solid media when the bulk-shear-wave velocity in the substrate is less than that in the piezoelectric layer but greater than the corresponding B-G wave velocity in the same pie- zoelectric material with an electroded surface. Such a wave does not exist in such layered structures in the absence of pie- zoelectricity. The mode shapes for displacement and electric potential in the piezoelectric layer are obtained and discussed theoretically. The study extends the regime of transverse sur- face waves and may lead to potential applications to surface acoustic wave devices.

关键词： Transverse surface wave Piezoelectric coupled solids - Dispersion relationSurface acoustic wave devices

Grain refining in weld metal using short-pulsed laser ablation during CW laser welding of 2024-T3 aluminum alloy

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International Journal of Extreme Manufacturing 2019年第4期1卷 34-41页

作者： Masaki Kasuga Tomokazu Sano Akio hirose Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University2-1 Yamada-okaSuitaOsaka 565-0871Japan

The 2024 aluminum alloy is used extensively in the aircraft and aerospace industries because of its excellent mechanical ***,the weldability of 2024 aluminum alloy is generally low because it contains a high number of solutes,such as copper(Cu),magnesium(Mg),and manganese(Mn),causing solidification *** high speed welding of 2024 aluminum alloy without the use of filler is achieved,the applicability of 2024 aluminum alloys will *** refining is one of the methods used to prevent solidification cracking in weld metal,although it has never been achieved for high-speed laser welding of 2024 aluminum alloy without ***,we propose a short-pulsed,laser-induced,grain-refining method during continuous wave laser welding without ***-on-plate welding was performed on a 2024-T3 aluminum alloy at a welding speed of 1 m min−1 with a single mode fiber laser at a wavelength of 1070 nm and power of 1 *** in and around the molten pool were irradiated with nanosecond laser pulses at a wavelength of 1064 nm,pulse width of 10 ns,and pulse energy of 430 *** grain-refinement effect was confirmed when laser pulses were irradiated on the molten *** grain-refinement region was formed in a semicircular shape along the solid–liquid *** of the vertical section indicate that the grain-refinement region reached a depth of 1 mm along the solid–liquid *** Vickers hardness test results demonstrated that the hardness increased as a result of grain refinement and that the progress of solidification cracking was suppressed in the grain refinement region.

关键词： 2024 aluminum alloy hot cracking laser welding grain refinement dendrite fragmentation short pulsed laser laser ablation

Nature of complex number and complex-valued neural networks

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Frontiers of Electrical and Electronic Engineering in China 2011年第1期6卷 171-180页

作者： Akira hirose Department of Electrical Engineering and Information Systems The University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-8656Japan

We discuss the nature of complex number and its effect on complex-valued neural networks(CVNNs).After we review some examples of CVNN applications,we look back at the mathematical history to elucidate the features of complex number,in particular to confirm the importance of the phaseand-amplitude viewpoint for designing and constructing CVNNs to enhance the *** viewpoint is essential in general to deal with waves such as electromagnetic wave and ***,we point out that,although we represent a complex number as an ordered pair of real numbers for example,we can reduce ineffective degree of freedom in learning or self-organization in CVNNs to achieve better generalization *** merit is significantly useful not only for waverelated signal processing but also for general processing with frequency-domain treatment through Fourier transform.

关键词： electromagnetic wave lightwave coherence adaptive processing in sensing and imaging learning logic neural hardware

Plasma-enhanced Deposition of Nano-Structured Carbon Films

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Plasma Science and Technology 2005年第1期7卷 2660-2664页

作者：杨巧勤肖持进 A.hirose Plasma Physics Laboratory University of Saskatchewan 116 Science Place Saskatoon SK S7N 5E2 Canada

By pre-treating substrate with different methods and patterning the catalyst, selective and patterned growth of diamond and graphitic nano-structured carbon films have been realized through DC Plasma-Enhanced Hot Filament Chemical Vapor Deposition (PE-HFCVD). Through two-step processing in an HFCVD reactor, novel nano-structured composite diamond films containing a nanocrystalline diamond layer on the top of a nanocone diamond layer have been synthesized. Well-aligned carbon nanotubes, diamond and graphitic carbon nanocones with controllable alignment orientations have been synthesized by using PE-HFCVD. The orientation of the nanostructures can be controlled by adjusting the working pressure. In a Microwave Plasma Enhanced Chemical Vapor Deposition (MW-PECVD) reactor, high-quality diamond films have been synthesized at low temperatures (310℃-550℃) without adding oxygen or halogen gas in a newly developed processing technique. In this process, carbon source originates from graphite etching, instead of hydrocarbon. The lowest growth temperature for the growth of nanocrystalline diamond films with a reasonable growth rate without addition of oxygen or halogen is 260℃.

关键词： nanocrystalline nanotube nanocone diamond film graphitic carbon film microwave CVD hot filament CVD

Small sphincterotomy combined with papillary dilation with large balloon permits retrieval of large stones without mechanical lithotripsy

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World Journal of Gastroenterology 2007年第15期13卷 2179-2182页

作者： Atsushi Minami Shinji hirose Tomohiro Nomoto Shoichiro Hayakawa Internal Medicine Kawasaki Kyodo Hospital 2-1-5 Sakuramoto Kawasaki City 210-0833Japan

AIM： TO introduce a new method： small endoscopic sphincterotomy （ES） combined with endoscopic papillary large balloon dilation （SES ＋ EPLBD） to treat patients with large biliary stones.METHODS： Retrieval of large biliary stones was performed in 88 patients. Mean stone size was 14 ± 3 mm and mean number of stones was 2.5 ± 3.5. Firstly, ES with a small incision was performed. Next, endoscopic papillary dilation was performed with a large balloon to slowly match the size of the bile duct. Stones were then retrieved from the biliary duct with a balloon and a basket.RESULTS： Stone retrieval was successful in all cases except one cystic duct stone case without the need to crush large stones. Mean procedure time was 30 ± 5 min. Dilating the papillary orifice with a large balloon made it possible to remove large stones smoothly without crushing them. After dilation with the large balloon, there were some instances of oozing, but no perforations. One instance of post-procedural pancreatitis （1%） occurred. CONCLUSION： SES ＋ EPLBD was effective for the retrieval of large biliary stones without the use of mechanical lithotripsy.

关键词： Endoscopic sphincterotomy Endoscopic papillary dilation Bile duct stone