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Influence of bias on properties of carbon films deposited by MCECR plasma sputtering method

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中国有色金属学会会刊：英文版 2004年第z1期14卷 251-254页

作者： CAI Chang-long DIAO Dong-feng S.Miyake t.matsumoto Department of Photoelectrical Engineering Xi''an Institute of Technology Xi''an 710032 China School of Mechanical Engineering Xi''an Jiaotong University Xi''an 710049 China Joining and Welding Research Institute Osaka University Osaka 567-0047 Japan Joining and Welding Research Institute Osaka University Osaka 567-0047 Japan

the mirror-confinement-type electron cyclotron resonance(MCECR) plasma source has high plasma density and high electron temperature. It is quite useful in many plasma processing, and has been used for etching and thin-film deposition. the carbon films with 40 nm thickness were deposited by MCECR plasma sputtering method on Si, and the influence of substrate bias on the properties of carbon films was studied. the bonding structure of the film was analyzed by the X-ray photoelectron spectroscopy(XPS), the tribological properties were measured by the pin-on-disk(POD) tribometer, the nanohardness of the films was measured by the nanoindenter, and the deposition speed and the refractive index were measured by the ellipse meter. the better substrate bias was obtained, and the better properties of carbon films were obtained.

关键词： MCECR plasma sputtering carbon films substrate bias films properties

Dynamics of Secondary Large-Scale Structures in EtG turbulence Simulations

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Plasma Science and technology 2006年第1期8卷 110-113页

作者：李继全 Y.KISHIMOtO 董家齐 N.MIYAtO t.matsumoto Southwestern Institute of Physics and SWIP-DUT Joint Lab for Fusion Plasma PhysicsChengdu 610041China Department of Fundamental Energy Kyoto University611-0011 GokashoUjiJapan Naka Fusion Research EstablishmentJAERINakaIbaraki 311-0193Japan Naka Fusion Research Establishment JAERINakaIbaraki 311-0193Japan

the dynamics of secondary large-scale structures in electron-temperature-gradient （EtG） turbulence is investigated based on gyrofluid simulations in sheared slab geometry. It is found that structural bifurcation to zonal flow dominated or streamer-like states depends on the spectral anisotropy of turbulent EtG fluctuation, which is governed by the magnetic shear. the turbulent electron transport is suppressed by enhanced zonal flows. However, it is still low even if the streamer is formed in EtG turbulence with strong shears. It is shown that the low transport may be related to the secondary excitation of poloidal long-wavelength mode due to the beat wave of the most unstable components or a modulation instability. this large-scale structure with a low frequency and a long wavelength may saturate, or at least contribute to the saturation of EtG fluctuations through a poloidal mode coupling. the result suggests a low fluctuation level in EtG turbulence.

关键词： large-scale structures EtG turbulence gyrofluid simulation tokamak

He and Ar isotopes in mantle megacryst minerals from Nushan and Yingfengling in Southeast China

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Chinese Science Bulletin 2003年第15期48卷 1624-1630页

作者： XUShijin FANGZhong t.matsumoto J.Matsuda M.Yasuda YUJinhai WANGRucheng LIUWenzhong DepartmentofEarthSciences StateKeyLaboratoryforMineralDepositsResearchNanjingUniversityNanjing210093China DepartmentofEarthandSpaceSciences OsakaUniversityOsaka560-0043Japan

He and Ar isotopic compositions of megacrystal minerals from mantle xenoliths were measured by the technique of vacuum crushing extraction. the used samples were clinopyroxene, garnet and ilmenite in Cenozoic alkaline basalts, which were from Nushan in Anhui Province and Yingfengling in Guangdong Province, respectively, and represented materials from the upper mantle in the continental margin of SE China. the results show 3He/4He ratios of 7.99 Ra to 8.58 Ra, consistent with the characteristic ratios of the MORB-type mantle. 40Ar/39Ar ratios vary from 313 to 909, suggesting a binary mixing between the MORB-type mantle and air argons. this may reflect the incorporation of the air argon absorbed in oceanic sediments into the mantle beneath the continental margin by subduction of oceanic plate. this study presents the first report that ilmenite megacrysts contain abundant fluid inclusions and noble gases in the mantle xenoliths.

关键词：东南地区中国氦氩亏损地幔

Reduction of Pt Usage in Fuel Cell Electrocatalysts Using Carbon Nanotubes and Non-Pt Metals

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复旦学报（自然科学版） 2005年第5期44卷 668-669页

作者： J. Nakamura Y. Nagashima t.Yamazaki t.matsumoto E. Yoo Graduate School of Pure and Applied Sciences University of Tsukuba Tsukuba 305-8573 JapanGraduate School of Pure and Applied Sciences University of Tsukuba Tsukuba 305-8573 JapanGraduate School of Pure and Applied Sciences University of Tsukuba Tsukuba 305-8573 JapanInstitute for Molecular Science Okazaki 444-8585JapanGraduate School of Pure and Applied Sciences University of Tsukuba Tsukuba 305-8573 Japan

the high-priced and limited Pt constitutes a high barrier to commercialization of fuel cells. Pt is essential for the electrode catalyst of polymer electrolyte fuel cells (PEFCs). A reduction in Pt usage is one of the key requirements for the commercialization of fuel cells for use in everyday life, because of its high price and limited availability, and the difficulty of finding suitable substitutes. Non-Pt fuel cell catalysts will decrease the demand for Pt by PEFCs, enabling more Pt to be available for use in other essential products, and make fuel cells more popular[1]. the cheaper Mo2C is known to possess similar catalytic activities and electronic structures to Pt[2]. Carbon black (CB) is widely used as the support for Pt nanoparticles. However, we found that when carbon nanotubes (CNts) rather than CB are used as the support, the performance is improved, especially below 600 mA/cm2[3,4]. Here, we show that a combination of Mo2C catalyst and carbon nanotubes in the anode provides performance as high as half that of the current PEFCs with Pt catalysts below 600mA/cm2.

关键词：燃料电池碳纳米管碳化物催化物电极

输电线在不同载流量及改变线路走向时的磁场分布分析(英文)

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高电压技术 2011年第11期37卷 2830-2835页

作者： t.matsumoto H.Hirata H.tarao N.Hayashi K.Isaka Anan National College of technology Tokushima 774-0042Japan Kagawa National College of technology Kagawa761-8058Japan University of Miyazaki Miyazaki 889-2192Japan University of tokushima Tokushima 770-8506Japan

transmission power lines are a common source of extremely low frequency(ELF) magnetic fields which are usually analyzed as serial lines in one *** vertical-type double-circuit power lines,which are generally used in Japan,sometimes carry different current for each circuit and change *** this paper,we focused on both the angle of direction change and the current balance in order to clarify the characteristics of distribution of magnetic fields at a height of 1 *** magnetic field distributions were analyzed considering both the angle of power lines changing direction and the current balance of each *** total magnetic field under overhead vertical-type double-circuit power lines with same current was generally reduced in comparison with that under a single-circuit power line due to phase *** total magnetic fields around the turning point where the change of transmission lines direction increased because each circuit came closer in that *** component of B_z effect on total magnetic field was greatest around the maximum of total magnetic fields nearby the turning point.

关键词： extremely low frequency(ELF) magnetic field power lines calculation double-circuit different current

Expression of Neuropeptide Y gene in mouse testes during testicular development

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Asian Journal of Andrology 2006年第4期8卷 443-449,515页

作者： M.terado M.Nomura K.Mineta N.Fujimoto t.matsumoto Department of Urology University of Occupational and Environmental HealthSchool of MedicineKitakyushu 807-8555Japan

Aim:to elucidate the distribution and regulation of Neuropeptide Y(NPY)gene expression in testes under physiologi- cal and pathophysiological conditions,such as testicular development,fasting and experimental cryptorchidism. Methods:In the first experiment,C57BL/6J male mice at the ages of 3 days as well as 2,3,5 and 8 weeks were used. In the second and third experiments,adult C57BL/6J male mice were subjected to fasting for 48 h and experimental cryptorchidism for 72 *** NPY transcripts were detected by isotopic in situ hybridization ***: the NPY transcripts were exclusively expressed in the interstitial cells regardless of the age groups and experimental *** NPY mRNA levels were found to increase significantly with age(from the neonatal to prepubertal period [Pthe prepubetal to postpubertal period [Ption for 48 h resulted in a significant increase in the NPY mRNA levels in the arcuate nucleus of the hypothalamus(Pt not in the *** cryptorchidism for 72 h failed to regulate the NPY gene expression in the ***: NPY gene expression is distributed in Leydig cells and increases in line with testicular *** regulation of testicular NPY is different from that of hypothalamic NPY.(Asian J Androl 2006 Jul;8:443-449)

关键词： Neuropeptide Y testes in situ hybridization histochemistry steroidogenesis androgen testicular development cryptorchidism

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中间相沥青及其碳纤维

新型炭材料(中英文) 1986年第4期 16-21页

作者： t·matsumoto 立早

引言纤维碳化在一世纪以前被爱迪生用来制取炽热灯丝,目前它仍然是碳纤维生产中的一个基本过程。碳纤维是一种独特的材料,应用广泛。特别是高性能碳纤维(HPCFS)最近相当引人注目,被广泛用于宇航和运动器材的先进复合材料的增强材料。高... 详细信息

引言纤维碳化在一世纪以前被爱迪生用来制取炽热灯丝,目前它仍然是碳纤维生产中的一个基本过程。碳纤维是一种独特的材料,应用广泛。特别是高性能碳纤维(HPCFS)最近相当引人注目,被广泛用于宇航和运动器材的先进复合材料的增强材料。高性能碳纤维的这些应用是基于高强度和高模量,而其高强和高模

关键词：中间相沥青纤维纺丝头模量高性能碳纤维金相相组成中间相沥青基碳纤维沥青基

封闭式电子回旋共振等离子体低温沉积SrtiO_3膜

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西安工业学院学报 2004年第3期24卷 214-217页

作者：蔡长龙刁东风 t.matsumoto S.Miyake 西安工业学院光电工程学院西安710032 西安交通大学日本国大阪大学

在室温条件下 ,用封闭式电子回旋共振 (MCECR)等离子体溅射方法沉积了SrtiO3(StO)膜 .用Ar等离子体在Si基片上溅射的StO膜是非晶的 ,然而用Ar/O2 等离子体在Pt/ti/SiO2 /Si上溅射的是充分结晶的StO膜 .为了使非晶薄膜结晶 ,用电炉加热或... 详细信息

在室温条件下 ,用封闭式电子回旋共振 (MCECR)等离子体溅射方法沉积了SrtiO3(StO)膜 .用Ar等离子体在Si基片上溅射的StO膜是非晶的 ,然而用Ar/O2 等离子体在Pt/ti/SiO2 /Si上溅射的是充分结晶的StO膜 .为了使非晶薄膜结晶 ,用电炉加热或 2 8GHz微波辐射对非晶StO膜进行退火处理 .采用微波辐射 ,使基片温度为 5 73K时 ,在Si上的StO膜退火后的介电常数大约为 2 6 0 ,这值近似等于块状StO材料的介电常数 .由于微波辐射能够降低薄膜的退火温度和提高薄膜的电特性。

关键词：封闭式电子回旋共振(MCECR) 微波 SrtiO3(SrO) 等离子体溅射

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基于人工智能的胸片房颤检测

国际医学放射学杂志 2022年第6期45卷 739-740页

作者： t.matsumoto S.Ehara S.L.Walston Y.Mitsuyama Y.Miki D.Ueda 杨淑杰

摘要目的旨在建立一种基于人工智能（AI）的胸片房颤（AF）特征检测模型。方法该回顾性研究连续收集 2016 年7 月—2019 年 5 月期间在该机构进行超声心动图检查病人

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