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解放军医学杂志 2006年第10期31卷 1002-1004页

作者：王学晶伊藤喜久北京大学第一医院检验科北京100034 日本旭川医科大学检查医学部

目的对一步法酶联免疫吸附测定（ELISA）试剂盒进行功能评价，建立参考范围并对分析前和可能影响测定的一些因素进行研究。方法采用ELISA对尿液中的Ⅳ型胶原进行测定。对试剂盒的敏感性，测量线性，精密度，特异性，回收率进行了测定和... 详细信息

目的对一步法酶联免疫吸附测定（ELISA）试剂盒进行功能评价，建立参考范围并对分析前和可能影响测定的一些因素进行研究。方法采用ELISA对尿液中的Ⅳ型胶原进行测定。对试剂盒的敏感性，测量线性，精密度，特异性，回收率进行了测定和评价，并进行干扰试验和初步建立参考范围。同时评价分析前因素，包括采样、离心、保存条件和时间，以及冻融和昼夜节律对于测定的影响。结果该方法具有令人满意的敏感性（0．2ng／m1），测量线性（0．8～50ng／m1），精密度（CV〈7％），特异性和回收率（82．84％～97．45％）。精液的污染对于Ⅳ型胶原的测定没有显著影响。尿内Ⅳ型胶原的量呈明显的昼夜节律，晨尿内含量最低，白天含量达到最高，睡前再次下降。Ⅳ型胶原在尿液内比较稳定，但长时间室温保存也可被各种蛋白酶的降解。冻融对于Ⅳ型胶原的影响不大，但离心可以造成测量值下降。将尿液与一定量的缓冲液（pH7．5的TRIS-HCI）混合（10：1）可以得到一个满意的回收率，避免Ⅳ型胶原被降解。结论该试剂盒具有良好的性能；Ⅳ型胶原在尿液内比较稳定，但如需长期保存，应加入缓冲液并在-80℃保存。

关键词：尿分析前因素胶原Ⅳ型酶联免疫吸附测定

Response of plasma turbulence against externally-controlled perturbations

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Chinese Physics B 2012年第9期21卷 385-395页

作者： S. I. itoh K. itoh Research Institute for Applied Mechanics Kyushu University itoh Research Center for Plasma Turbulence Kyushu University National Institute for Fusion Science

A theory of the dynamic response of the turbulent plasma against the externally-controlled perturbations is reported. Based on Mori＇s method [Prog. Theor. Phys. 33 423 （1965）], the nonlinear force is assmned to be separated into the memory function and the nonlinear fluctuating force. The former corresponds to the damping term, and the latter is categorized into the noise term. The response of the turbulent plasma against the externally-controlled source is formulated. The response kernel, which connects the externally-controlled source and the response of the turbulent field, is shown to have both the nonlocal property （in space） and the non-Markovian response （in time）. A discussion is made on the nonlocal and non-Markovian response, including the case of disparate-scale interactions. A new method is proposed to observe experimentally the nonlocal interaction in the drift wave turbulence via the zonal flows.

关键词： turbulent transport nonlocal and non-Markovian response

Measurements of the Ca II infrared triplet lines of young stellar objects

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Research in Astronomy and Astrophysics 2013年第10期13卷 1189-1201页

作者： Yoichi itoh Keiko Moto'oka Yoichi itoh The Saga Prefecture Space & Science Museum 16351 Nagashima Takeo Takeo Saga 843-0021 Japan Nishi-Harima Astronomical Observatory Center for Astronomy University of Hyogo 407-2 Nishigaichi Sayo Hyogo 679-5313 Japan yitoh @nhao.jp

Equivalent widths and line widths of Ca II infrared triplet emission lines were measured in the high-resolution optical spectra of 39 young stellar *** found that the equivalent widths of the emission lines decrease with stellar *** has often been claimed that strong chromospheric activity is generated by a dynamo process caused by fast rotation of the ***,we found no clear correlation between the strength of the Ca II lines and the stellar rotation ***,we found that the objects with high mass accretion rates had stronger Ca II emission *** correlation supports the turbulent chromosphere model or the magnetic accretion theory for classical T Tauri *** also noticed that the equivalent widths of Ca II lines in transitional disk objects are one-tenth of those in classical T Tauri stars,even if the masses of the circumstellar disks are comparable.

关键词： stars:pre-main sequence stars:emission lines

Heavy Ion Beam Probe Measurement in Turbulence Diagnostic Simulator

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Plasma Science and Technology 2011年第3期13卷 326-331页

作者： Naohiro KASUYA Seiya NISHIMURA Masatoshi YAGI Kimitaka itoh Sanae-I itoh National Institute for Fusion Science 322-60roshi-cho Toki Gifu 509-5292 Japan Research Institute for Applied Mechanics Kyushu University 6-1 Kasuga-kouen KasugaFukuoka 816-8580 Japan Japan Atomic Energy Agency 801-1 Mukoyama Naka Ibaraki 311-0193 Japan

A numerical measurement module simulating a heavy ion beam probe was developed, and numerical measurements of electrostatic potential and density fluctuations are carried out for 3-D turbulent data generated by a global simulation of drift-interchange mode turbulence in helical plasmas. The deviation between measured and local values is estimated. It is found that the characteristic structures can be detected in spite of the screening effect due to the finite spatial resolution.

关键词： turbulence structural formation numerical simulation heavy ion beamprobe fluctuation spatial resolution

Fatigue Property of Additively Manufactured Ti-6Al-4V under Nonproportional Multiaxial Loading

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Chinese Journal of Mechanical Engineering 2021年第6期34卷 76-84页

作者： Yuya Kimura Fumio Ogawa Takamoto itoh Graduate School of Science&Engineering Ritsumeikan UniversityShiga 5258577Japan Fracture and Reliability Research Institute Graduate School of Tohoku UniversityMiyagi 9808579Japan Department of Mechani-cal Engineering Ritsumeikan UniversityShiga 5258577Japan

The low cycle fatigue strength properties of the additively manufactured Ti-6Al-4V alloy are experimentally investi-gated under proportional and nonproportional multiaxial *** fatigue tests were conducted using hollow cylinder specimens with and without heat treatments,at room temperature in *** fatigue tests were conducted:one for proportional loading and one for nonproportional *** proportional loading was represented by a push-pull strain path(PP)and the nonproportional loading by a circle strain path(Cl).The failure lives of the additively manufactured specimens were clearly reduced drastically by internal voids and ***,the sizes of the defects were measured,and the defects were found not to cause a reduction in fatigue strength above a critical *** fracture surface was observed using scanning electron microscopy to investigate the fracture mechanisms of the additively manufactured specimens under the two types of strain *** fracture patterns were recognized for each strain paths;however,both showed retention of the crack propagation,despite the presence of numerous defects,probably because of the interaction of the *** crack propagation properties of the materials with numerous defects under nonproportional multiaxial loading were clarified to increase the reliability of the additively manufactured components.

关键词： Additive manufacturing Ti-6Al-4V Low cycle fatigue Multiaxial stress Nonproportional loading Internal defect

Microwave Behavior of α-Fe/Fe_3B/Y_2O_3 Nanocomposites in GHz Range Prepared by Melt-Spun Technique

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Journal of Rare Earths 2004年第1期22卷 13-16页

作者： Masahiro itoh Ken-ichi Machida Collaborative Research Center for Advanced Science and Technology Collaborative Research Center for Advanced Science and Technology Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 JapanOsaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan

Nanocomposites α-Fe/Fe 3B/Y 2O 3 were prepared by a melt-spun technique, and the electromagnetic wave absorption properties were measured in the 0 05～20 05 GHz range. Compared with α-Fe/Y 2O 3 composites, the resonance frequency (f r) of α-Fe/Fe 3B/Y 2O 3 shifted to a higher frequency range due to the large anisotropy field (H A) of tetragonal Fe 3B (～0 4 mA·m -1). The relative permittivity (ε r=ε r′-jε r″) was constantly low over the 0 5～10 GHz region, which indicates that the composite powders have a high resistivity (ρ=～100 Ωm). The effective electromagnetic wave absorption (RL<-20 dB) was obtained in a frequency range of 2.7～6.5 GHz on resin composites of 80% (mass fraction) α-Fe/Fe 3B/Y 2O 3 powders, with thickness of 6～3 mm respectively. A minimum reflection loss of -33 dB was observed at 4.5 GHz with an absorber thickness of 4 mm.

关键词： melt-spun nanocomposites electromagnetic wave absorption anisotropy field matching frequency

High-Resolution Spectroscopy of Winds Associated with T Tauri Stars

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Research in Astronomy and Astrophysics 2016年第2期16卷 89-96页

作者： Naoto Iguchi Yoichi itoh Graduate School of Science Kobe University1-1 Rokkodai-choNada-kuKobeHyogo 657-8501Japan Nishi-Harima Astronomical Observatory Center for AstronomyUniversity of Hyogo407-2NishigaichiSayoHyogo 679-5313Japan

We carried out optical high-resolution spectroscopy of T Tauri stars using the Subaru Telescope. Using archived data from the Keck Telescope and the Very Large Telescope, we detected forbidden lines of [S II] at 4069A, in addition to those of [O I] at 5577 A and 6300A, for 13 T Tauri stars. We consider that low-velocity components of these forbidden lines emanate from the wind associated with T Tauri stars. Using two flux ratios of the three lines, we simultaneously determined the hydrogen density and temperature of the winds. The winds ofT Tauri stars have a hydrogen density of 2.5 × 106 cm^-3 - 2.5 × 10^9 cm^-3 and a temperature of 10 800 -18 000 K. The mass loss rates by the wind are estimated to lie in the range from 2.0 × 10^-10 M⊙ yr-1 to 1.4× 10^-9 M⊙ yr-1. The mass loss rates are found to increase with increasing mass accretion rates. The ratio of the mass loss rate to the mass accretion rate is 0.001-0.1 for classical T Tauri stars and 0.1-1 for transitional disk objects.

关键词： stars pre-main sequence -- stars emission lines

Implementation and experiments for interactive lyrics transcreation system

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 179-194页

作者： Ayano Nishimura Takayuki itoh Ochanomizu University 2-1-1 OtsukaBunkyo-kuTokyo 1128610Japan

The evolution of the Internet has enabled us to enjoy the music created in various *** still,it is often difficult to understand the lyrics written in foreign *** translators have published many international songs with lyrics that fit the melody so that the ordinary people can enjoy the lyrics of such international *** paper discusses lyrics transcreation into the Japanese ***,the paper presents an interactive visual lyrics transcreation system and describes the details of its *** system allows users to select temporary lyrics from a set of tentative translations and then freely modify the lyrics with a real-time visualization *** also propose a lyrics translation algorithm that solves an essential problem of lyrics translation into *** this study,we interviewed two experts regarding problems with lyrics translation and received reviews of our presented *** also conducted preliminary experiments with 19 participants to determine the best combination of user interface components for our *** performed additional user experiments inviting 12 participants to compare lyrics transcreation using the presented system to manual lyrics *** transcreation by the presented system brought better results against those of manual transcreation.

关键词： Lyrics transcreation Score visualization Interactive system

Tensile properties of AZ31 sheet/bar and effects of texture

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中国有色金属学会会刊：英文版 2006年第A03期16卷 1741-1745页

作者：周清 G.itoh Y.MOTOHASHI College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Mechanical Engineering College of EngineeringIbaraki UniversityHitachi 316-8511Japan Research Center For Superplasticity Ibaraki UniversityHitachi 316-8511Japan

For understanding the deformation mechanism of AZ31 Mg alloy, two kinds of specimen, hot-rolled sheet and extruded bar were tested in tension at room temperature. Relatively small grain sizes ranging from 32 to 8.7μm are obtained by annealing at several temperatures. And then they were further cold-rolled with rolling angles of 0? 45?and 90? which is the angle between the rolling and the longitude direction of as-received specimen, and annealed at a temperature in recrystallization field. The yield stress were found from the stress—strain curve. The grain size dependence of the yield stress is found not in agreement with the Hall-Petch relationship. The texture of (0002) pole figure of each kind of specimen was tested by X-ray diffractometer. The specimen with strong basal texture shows large yield stress and low work-hardening rate, while the specimen with weak basal texture shows low yield stress and rapid work-hardening rate. These results are interpreted by the slip system activated in the different textures. A combined slip system was used to interpret the yield stress variation with the texture and the deformation mechanism was discussed.

关键词：镁合金机械性能金属变形张力应变分析