全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:M. Koyama , P. Baron ...
来源:[J].Atmospheric Measurement Techniques(IF 3.205), 2013, Vol.6 (5), pp.1359-1369DOAJ
摘要:The National Institute of Information and Communications Technology (NICT) has made a great deal of effort to develop a coherent 2 Μm differential absorption and wind lidar (Co2DiaWiL) for measuring CO2 and wind speed. First, coherent Integrated Path Differential ...
作者:M. Koyama , K. Sato
来源:[J].Engineering Fracture Mechanics(IF 1.413), 2019, Vol.216Elsevier
摘要:Abstract(#br)Micro-damage quantification and associated microstructure characterization in a ferrite/martensite dual-phase (DP) steel were performed after tensile tests with different strain rates of 10 −2 and 10 −4 s −1 in order to understand the strain rate sensitivit...
作者:... H. Ohtani , M. Koyama , K. Tsuzaki
来源:[J].Metallurgical and Materials Transactions A(IF 1.627), 2019, Vol.50 (7), pp.3019-3023Springer
摘要:Abstract(#br)This study uses first-principles calculations to investigate the effect of hydrogen on the chemical driving force of the transformation of iron from the face centered cubic (FCC) to hexagonal close packed (HCP) phase. The minimum energy path from FCC to HCP phases sh...
作者:M. Koyama , M. Cassé ...
来源:[J].Solid State Electronics(IF 1.482), 2015, Vol.108, pp.36-41Elsevier
摘要:Abstract(#br)A study of the gate oxide/channel interface quality in ultra-scaled SOI omega-gate nanowire NMOS FETs with cross-section as small as 10 nm × 10 nm is experimentally presented by low-frequency noise measurements. The noise study has been efficiently applied for t...
作者:M. Koyama , J. Yoshimura ...
来源:[J].Composite Structures(IF 2.231), 2016, Vol.136, pp.626-634Elsevier
摘要:Abstract(#br)A rotating disk often undergoes severe vibration at high rotation speeds because of unstable joining between the disk and a drive shaft. As described herein, three connection methods between a driving shaft and an annular rotation disk made of three-dimensionally car...
作者:M. Koyama , K. Goto
来源:[J].Composite Structures(IF 2.231), 2015, Vol.131, pp.304-311Elsevier
摘要:Abstract(#br)Annular disks made of three-dimensionally carbon-fiber-reinforced composites were optimized using numerical calculations, targeting high rotation speed and high energy density in a rotor system. This study examined two disk reinforcement patterns. One had added radia...
作者:M. Koyama , G. Gerstein ...
来源:[J].International Journal of Hydrogen Energy(IF 3.548), 2016, Vol.41 (34), pp.15362-15372Elsevier
摘要:Abstract(#br)The effects of tensile strain rate on the hydrogen-induced mechanical and microstructural features of a twinning-induced plasticity (TWIP) steel were investigated using a Fe-23Mn-0.5C steel with a saturated amount of hydrogen. To obtain a homogeneous hydrogen di...

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