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炭纳米纤维-天然石墨复合材料的制备及其作为锂离子电池阳极材料的电化学性能(英文)

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新型炭材料 2010年第2期25卷 89-96页

作者： Sang-Min Jang Jin Miyawaki masaharu tsuji Isao Mochida Seong-Ho Yoon 康飞宇 Interdisciplinary Graduation School of Engineering Sciences Kyushu University Kasuga Fukuoka 816-8580 Japan IMCE Kyushu University Kasuga Fukuoka 816-8580 Japan Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

制备一种炭纳米纤维-天然石墨复合材料,以改善作为锂离子电池阳极材料的天然石墨的倍率性能。通过优化控制天然石墨上炭纳米纤维的生长量及其形状提高了天然石墨的循环性能和倍率性能。与天然石墨原料相比,炭纳米纤维-天然石墨复合材料... 详细信息

制备一种炭纳米纤维-天然石墨复合材料,以改善作为锂离子电池阳极材料的天然石墨的倍率性能。通过优化控制天然石墨上炭纳米纤维的生长量及其形状提高了天然石墨的循环性能和倍率性能。与天然石墨原料相比,炭纳米纤维-天然石墨复合材料第一次放电容量达到了95%。炭纳米纤维的生长量被严格地控制在天然石墨质量的15%以下。研究发现:由于炭纳米纤维对充放电过程中阳极的体积膨胀和收缩程度的控制作用,天然石墨表面边位上生长的类似常青藤形的炭纳米纤维对倍率性能的提高最为有效。提出采用炭纳米纤维-天然石墨复合材料的原理结构模型解释重复充放电过程中电极的体积稳定性。通过在石墨表面上生长类常青藤形炭纳米纤维而使得SEI(固体电解质界面)变薄并减少了充放电过程中阳极的体积变化,因而提高了倍率性能。

关键词：天然石墨锂离子电池炭纳米纤维倍率性能体积稳定性

啤酒花矮化类病毒及葡萄黄豆类病毒在中国栽培葡萄上的发生及序列分析

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啤酒花矮化类病毒及葡萄黄豆类病毒在中国栽培葡萄上的发生及序列...

A sweeping preconditioner for Yee＇s finite difference approximation of time-harmonic Maxwell＇s equations

中国植物病理学会2005年学术年会暨植物病理学报创刊50周年纪念会

作者：郭瑞 Sano Teruo tsuji masaharu 李世访中国农业科学院植物保护研究所植物病虫害生物学国家重点实验室 Laboratory of Plant Pathology Faculty of Agriculture and Life ScienceHirosaki University HirosakiJapan 036-8561

2005年对中国科学院植物研究所葡萄保存圃的58个不同葡萄品种的样品进行RT-PCR、斑点杂交检测,发现大部分品种存在HSVd和GYSVd,所采所有

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Frontiers of Mathematics in China 2012年第2期7卷 347-363页

作者： Paul tsuji Lexing YING ICES University of Texas at Austin Austin TX 78712 USA Department of Mathematics University of Texas at Austin Austin TX 78712 USA

This paper is concerned with the fast iterative solution of linear systems arising from finite difference discretizations in electromagnetics. The sweeping preconditioner with moving perfectly matched layers previously developed for the Helmholtz equation is adapted for the popular Yee grid scheme for wave propagation in inhomogeneous, anisotropic media. Preliminary numerical results are presented for typical examples.

关键词： Electromagnetic scattering Yee grid finite difference methods perfectly matched layers LDLT factorizations multifrontal method wave propagation in inhomogeneous and anisotropic media matrix preconditioners

Prediction of Aerodynamic Noise in a Ring Fan Based on Wake Characteristics

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Journal of Thermal Science 2011年第2期20卷 144-149页

作者： Soichi Sasaki masaharu Fukuda Masao tsujino Haruhiro Tsubota Faculty of Engineering Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan Graduate School of Science and Technology Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan Research Division Komatsu Ltd.1200 Manda Hiratsuka-shi Kanagawa 254-8567 Japan

A ring fan is a propeller fan that applies an axial-flow impeller with a ring-shaped shroud on the blade tip side. In this study, the entire flow field of the ring fan is simulated using computational fluid dynamics (CFD); the accuracy of the CFD is verified through a comparison with the aerodynamic characteristics of a propeller fan of current model. Moreover, the aerodynamic noise generated by the fan is predicted on the basis of the wake characteristics. The aerodynamic characteristic of the ring fan based on CFD can represent qualitatively the variation in the measured value. The main flow domain of the ring fan is formed at the tip side of the blade because blade tip vortex is not formed at that location. Therefore, the relative velocity of the ring fan is increased by the circumferential velocity. The sound pressure levels of the ring fan within the frequency band of less than 200 Hz are larger than that of the propeller fan. In the analysis of the wake characteristics, it revealed that Karman vortex shedding occurred in the main flow domain in the frequency domain lower than 200 Hz ; the aerodynamic noise of the ring fan in the vortex shedding frequency enlarges due to increase in the relative velocity and the velocity fluctuation.

关键词： Fan Vortex Aerodynamic Noise Wake Internal Flow

Deformation behaviors of magnesium alloy AZ31 sheet in cold deep drawing

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中国有色金属学会会刊：英文版 2008年第1期18卷 86-91页

作者：杨连发 MORI Ken-ichiro tsuji Hirokazu School of Electromechnical Engineering Guilin University of Electronic Technology Department of Production Systems Engineering Toyohashi University of Technology

To investigate how the popular magnesium alloy AZ31 sheet(aluminum 3%,zinc 1%)behaves in cold working,deep drawing experiments at room temperature,along with finite element(FE)simulation,were performed on the cold forming sheet of the AZ31 alloy after being annealed under various *** activities were focused on the fracture pattern,limit drawing ratio(LDR),deformation load,thickness distribution,anisotropic effect,as well as the influences of the annealing conditions and tool configuration on *** results display that punch shoulder radius instead of die clearance,has much influence on the thickness *** anisotropy is remarkable in cold working,which adversely impacts the *** fracture often happens on the side wall at an angle to axis of the deformed *** results also imply that the LDR for the material under present experimental conditions is 1.72,and annealing the material at 450 ℃ for 1 h may be preferable for the cold deep drawing.

关键词： AZ31镁合金冷压制各向异性有限元素模拟

S-1 induced hepatic steatosis in patients with pancreatic cancer:Retrospective analysis

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World Journal of Gastrointestinal Oncology 2017年第8期9卷 314-318页

作者： Kunihiro tsuji Hisashi Doyama Department of Gastroenterology Ishikawa Prefectural Central HospitalIshikawa 920-8530Japan

To determine whether S-1 induces hepatic steatosis in patients being treated for pancreatic cancer. METHODSThis retrospective study evaluated 22 patients who received oral S-1 as a first-line treatment for pancreatic cancer between January 2008 and July 2015 at the Ishikawa Prefectural Central Hospital. Patients underwent abdominal computed tomography (CT) scans before chemotherapy and within 3 mo from the start of treatment. CT numbers of the liver and spleen were measured before and after S-1 administration. Steatosis was diagnosed when the ratio of the CT number of the liver to that of the spleen (liver/spleen ratio) was 2 (range, 18-27 kg/m2). Of the 22 patients, six (27%) regularly consumed alcohol, and five (23%) had liver metastases. The mean ratio of CT number of the liver to the spleen was significantly higher before administration of S-1 (1.27 vs 1.09, P = 0.012) compared with after. Of the 22 patients, five (23%) had hepatic steatosis and 17 (77%) did not. The pretreatment demographic and clinical characteristics of these two groups showed no significant differences. The relationship between liver/spleen ratio and alanine transaminase activity in these patients. A statistically significant inverse correlation was observed (r = -0.417, P < 0.027). CONCLUSIONOf the 22 patients with pancreatic cancer, five (23%) experienced S-1 induced hepatic steatosis. Care should be taken during S-1 treatment of patients with pancreatic cancer.

关键词： S-1 Hepatic steatosis Pancreatic cancer Drug induced hepatitis 5-fluorouracil

Grain size altering yielding mechanisms in ultrafine grained high-Mn austenitic steel:Advanced TEM investigations

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Journal of Materials Science & Technology 2021年第27期86卷 192-203页

作者： Chang-Yu Hung Yu Bai Nobuhiro tsuji Mitsuhiro Murayama Department of Materials Science and Engineering Virginia TechBlacksburgVA24061USA Department of Materials Science and Engineering Kyoto UniversityYoshida-honmachiSakyo-kuKyoto606-8501Japan Elements Strategy Initiative for Structural Materials Kyoto UniversityYoshida-honmachiSakyo-kuKyoto606-8501Japan Institute for Materials Chemistry and Engineering Kyushu UniversityKasugaFukuoka8168580Japan

The underlying mechanism of discontinuous yielding behavior in an ultrafine-grained(UFG)Fe-31 Mn-3 Al-3 Si(wt.%)austenitic TWIP steel was investigated by the use of advanced TEM technique with taking the plastic deformation mechanisms and their correlation with grains size near the macroscopic yield point into *** yield drop mechanisms such as the dislocation locking by the Cottrell atmosphere due to the presence of interstitial impurities cannot explain the origin of this phenomenon in the UFG high-Mn austenitic TWIP ***,we experimentally revealed that the plastic deformation mechanisms in the early stage of deformation,around the macroscopic yield point,show an obvious association with grain *** specifically,the main mechanism shifts from the conventional slip in grain interior to twinning nucleated from grain boundaries with decreasing the grain size down to less than 1μ*** observation indicates that the grain size dependent deformation mechanisms transition is also deeply associated with the discontinuous yielding behavior as it could govern the changes in the grain interior dislocation density of mobile dislocations around the macroscopic yield point.

关键词： Ultrafine grains TWIP steel Yield-drop phenomenon Deformation twin nucleation Structural defects Transmission electron microscopy

Hydro-mechanical-electrical simulations of synthetic faults in two orthogonal directions with shear-induced anisotropy

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第11期16卷 4428-4439页

作者： Kazuki Sawayama Takuya Ishibashi Fei Jiang Takeshi tsuji Institute for Geothermal Sciences Kyoto UniversityBeppuJapan Fukushima Renewable Energy Institute AISTKoriyamaJapan Department of Engineering Yamaguchi UniversityUbeJapan School of Engineering University of TokyoTokyoJapan

Fluid flow in fractures controls subsurface heat and mass transport,which is essential for developing enhanced geothermal systems and radioactive waste *** permeability is controlled by fracture microstructure(***,roughness,and tortuosity),but in situ values and their anisotropy have not yet been *** advances in geophysical techniques allow the detection of changes in electrical conductivity due to changes in crustal stress and these techniques can be used to predict subsurface fluid ***,the paucity of data on fractured rocks hinders the quantitative interpretation of geophysical monitoring data in the ***,considering different shear displacements and chemical erosions,an investigation was conducted into the hydraulic-electric relationship as an elevated stress change in *** simulation of fracture flows was achieved using the lattice Boltzmann method,while the electrical properties were calculated through the finite element method,based on synthetic faults incorporating elastic-plastic *** results show that the hydraulic and electrical properties depend on the rock's geometric properties(*** length,roughness,and shear displacement).The permeability anisotropy in the direction parallel or perpendicular to the shear displacement is also notable in high stress ***,the permeability econductivity(i.e.,formation factor)relationship is unique under all conditions and follows a linear trend in logarithmic ***,both matrix porosity and fracture spacing alter this *** increase the slope of the linear trend,thereby changing the sensitivity of electrical observations to permeability changes.

关键词： Fracture flow Permeability Electrical conductivity Lattice Boltzmann method Anisotropy Chemical erosion Enhanced geothermal system

Deformation mechanism of bimodal microstructure in Ti-6Al-4V alloy:The effects of intercritical annealing temperature and constituent hardness

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Journal of Materials Science & Technology 2021年第12期71卷 138-151页

作者： Yan Chong Tilak Bhattacharjee Yanzhong Tian Akinobu Shibata Nobuhiro tsuji Department of Materials Science and Engineering Kyoto UniversityKyotoJapan Department of Materials Science and Engineering University of CaliforniaBerkeleyCAUSA Elements Strategy Initiative for Structural Materials(ESISM) Kyoto UniversityKyotoJapan Key Laboratory for Anisotropy and Texture of Materials School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Research Center for Metallic Wires Northeastern UniversityShenyang 110819China

The so-called bimodal microstructure of Ti-6 Al-4 V alloy,composed of primaryαgrains(α_(p))and transformed β areas(β_(trans)),can be regarded as a"dual-phase"structure to some extent,the mechanical properties of which are closely related to the sizes,volume fractions,distributions as well as nanohardness of the two *** this study,the volume fractions of primaryαgrains(vol.%(α_(p)))were systematically modified in three series of bimodal microstructures with fixed primaryαgrain sizes(0.8μm,2.4μm and 5.0μm),by changing the intercritical annealing temperature(T_(int)).By evaluating the tensile properties at room temperature,it was found that with increasing T_(int)(decreasing vol.%(α_(p))),the yield strength of bimodal microstructures monotonically increased,while the uniform elongation firstly increased with T_(int)until 910°C and then drastically decreased afterwards,thereby dividing the T_(int)into two regions,namely region I(830-910°C)and region II(910-970℃).The detailed deformation behaviors within the two regions were studied and compared,from the perspectives of strain distribution analysis,slip system analysis as well as dislocation *** bimodal microstructures in region I,due to the much lower nano-hardness ofβ_(trans)thanα_(p),there was a clear strain partitioning between the two constituents as well as a strain gradient from theα_(p)/β_(trans)interface to the grain interior ofα_(p).This activated a large number of geometrically necessary dislocations(GNDs)near the interface,mostly with components,which contributed greatly to the extraordinary work-hardening abilities of bimodal microstructures in region *** increasing T_(int),theα_(p)/β_(trans)interface length density gradually increased and so was the density of GNDs with components,which explained the continuous increase of uniform elongation with T_(int)in this *** bimodal microstructures in region II,where the nano-hardness ofβ_(trans)andα_(p)were comparable,neither a clear s

关键词： Ti-6Al-4V Bimodal microstructure Intercritical annealing temperature Strain distribution dislocation