|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | GAME-TIBET青藏高原云和降水综合观测概况及初步结果显示文摘对中日合作青藏高原能量水分循环试验( G A M E T I B E T) 项目中云和降水的多普勒雷达观测使用的气象观测仪器和获取的资料等情况进行了扼要的总结,并给出了那曲地区降水的日变化、不同雨量计测量降水的对比分析、风速对测量降水影响、多普勒雷达资料的个例分析及云的数值模拟等初步结果。 | 刘黎平 楚荣忠 宋新民 周筠君 冯锦明 陈成品 张彤 S.Shimizu K.Ueno T.Koike H.Fujii H.Yamada Y.Aoi T.Ueno J.Horikomi M.Kajikawa RShirooka J.Teshima | 1999 | 高原气象1999，18，3： | 30 |
| 2 | 青藏高原那曲地区冰雹天气系统中的大气电场显示文摘利用 1 998年 4~ 9月间进行的GAME TIBET青藏高原云和降水的多普勒雷达及大气平均电场加强期观测实验资料 ,对青藏高原那曲地区的冰雹天气系统中的大气电场作了定量观测和研究。结果表明 :在降雹过程中大气电场强度基本上均为负值 ,其峰值也均强于- 2 2kVm- 1;在降雹过程中随着降雹时间的临近 ,大气电场强度不断增强 ,但降雹开始时大气电场强度并未达到其峰值 ,峰值出现的时刻比开始降雹的时刻略有滞后 ;在各降雹日中 ,较强的大气电场强度基本上对应着各冰雹谱分布段较多的冰雹数目 ,而这种较好的相关在各谱分布段上都表现出来 ;随着降雹时间的临近 ,每 5min闪电频数不断增强。在开始降雹时每 5min闪电频数平均达到 43,峰值的出现时刻略滞后于开始降雹的时刻 ,这一滞后时间一般平均在 3min左右 ;在降雹过程中 ,单位面积中的冰雹数目与对应时段内总闪电数有着较好的对数关系 ,相关系数R为 0 .9540。在降雹过程的时间序列上 ,冰雹云成熟期过后 ,总闪电次数与冰雹降雹率成反相关。 | 周筠珺 陈成品 刘黎平 楚荣忠 冯锦明 张彤 宋新民 M.Kajikawa H.Fujii Y.Aoi T.Koike S.Shimizu K.Ueno | 2000 | 高原气象2000，19，3： | 22 |
| 3 | Evaluation of dynamic development of grain structure during friction stir welding of pure copper using a quasi in situ method显示文摘By employing a quasi in situ method, we investigated the dynamic evolution of the grain structure con-sidering the material flow, strain, and strain rate in the friction stir welding of pure copper. The tool' stop action' and rapid cooling were employed and a brass foil was used as a marker to show the material flow path. The grain structure along the material flow path was characterised using electron backscatter diffraction. Static recrystallization occurs for the work-hardened base material in the preheating stage in front of the tool In the acceleration flow stage, grains are significantly refined by plastic deforma-tion, discontinuous dynamic recrystallization, annealing twinning during the strain-induced boundary migration and slight continuous dynamic recrystallization. In the deceleration flow stage, due to a strain reversal, the grain first coarsens, and is thereafter refined again. Finally, the hot-deformed material in the shoulder-affected zone is ‘frozen’ directly whereas that in the probe-affected zone undergoes signif-icant annealing;thus, the recrystallized microstructure and 45°-rotated cube texture are obtained in the probe-affected zone. | X.C.Liu Y.F.Sun T.Nagira K.Ushioda H.Fujii | 2019 | Journal of Materials Science & Technology2019，35，7： | 3 |
| 4 | Friction stir spot welding of SPCC low carbon steel plates at extremely low welding temperature显示文摘Friction stir spot welding (FSSW) was applied to 2.0 mm thick steel plate cold-rolled commercial (SPCC) low carbon steel plates at a very low rotation speed that ranged from 5 to 50rpm, which was much lower than that generally used for the conventional FSSW technique. Due to the very low heat input, the welding processes could therefore be completed at a peak welding temperature below 160℃. As a result, a significantly refined microstructure with an average grain size of about 0.41μm was formed in the stir zone of the joints and the JI {0-11 }<-211> and J2{1-1O}<-1-12> shear textures were the dominant components, which are different from the D1{11-2}<111> and D2{-1-12}<111> shear textures formed in the conventional FSSW joints. In addition, no heat affected zone could be detected along the crosssectional plane of the joints. Although a few void-like non-bonded areas were still observed along the interface between the upper and lower steel plates, the shear tensile loads of the joints increased to about 10.0 kN when welded at a condition of 8t, 20rpm and 30 s, and the joints fractured through the plug failure mode. | Y.F.Sun H.Fujii Y.Sato Y.Morisada | 2019 | Journal of Materials Science & Technology2019，35，5： | 2 |
| 5 | Rupture locations of friction stir welded joints of AA2017-T351 and AA6061-T6 aluminum alloys显示文摘The tensile rupture locations of friction stir welded joints of AA2017-T351 and AA6061-T6 aluminum alloys were examined. The experiments show that the rupture locations of the joints are different for the two aluminum alloys, which are influenced by the welding parameters. When the joints are free of welding defects, the AA2017-T351 joints are ruptured in the weld nugget adjacent to the thermo-mechanically affected zone on the advancing side and the rupture surfaces appear as oval contours of the weld nugget, while the AA6061-T6 joints are ruptured in the heat affected zone on the retreating side and the rupture surfaces are inclined at a certain degree to the bottom surfaces of the joints. When welding defects are present in the joints, the AA2017-T351 joints are ruptured in the weld center, while the AA6061-T6 joints are ruptured on the retreating side near the weld center. The rupture locations of the joints are dependent on the internal structures of the joints and can be explained through them. | 刘会杰 冯吉才 H.Fujii M.Maeda K.Nogi | 2005 | 中国有色金属学会会刊:英文版2005，15，3： | 1 |
| 6 | Inverse Analysis of Origin-Destination Matrix for Microscopic Traffic Simulator显示文摘Microscopic traffic simulations are useful for solving various trafficrelated problems,e.g.traffic jams and accidents,local and global environmental and energy problems,maintaining mobility in aging societies,and evacuation planning for natural as well as man-made disasters.The origin-destination(OD)matrix is often used as the input to represent traffic demands into traffic simulators.In this study,we propose an indirect method for estimating the OD matrix using a traffic simulator as an internal model.The proposed method is designed to output results that are consistent with the input of the simulator.The method consists of the following steps:(1)calculating link traffic volume from the OD matrix,and(2)updating the matrix.The estimated matrix is updated iteratively until it converges to a predefined tolerance level.Numerical experiments are then conducted using the proposed method on a grid network and on a representation of an actual road network.Finally,we discuss the characteristics of the proposed method and the non-negative constraint for the traffic volume. | K.Abe H.Fujii S.Yoshimura | 2017 | Computer Modeling in Engineering & Sciences2017，，1： | 0 |
| 7 | Effect of Welding Parameters on GTA Weld Shape for Pure Iron Plate under Ar-O_2 Mixed Shielding显示文摘焊接形状变化因为不同焊接参数在焊接,氩氧混合了防护的煤气的钨弧(GTA ) 下面在纯铁板上被调查。结果显示出氧的那小增加到基础防护气体能有效地调整的氩氧吸附到熔融的水池。当在焊接水池的氧内容在临界数值上时,里面的 Marangoni 传送对流发生在水池表面上, 80 X 10 ^( 为纯铁板 underAr-0.3 百分比 O_2 的 -6), 混合了防护。在焊接水池的低氧内容改变里面的 Marangonito 在防护的 Ar-0.1 百分比 O_2 下面的一个外面的方向。GTA 焊接形状在水池表面上取决于到大程度 Marangoni 传送对流的模式和力量,它由表面的内容是坚定的活跃元素,氧,在焊接水池和焊接参数。液体水池上的 Marangoni 传送对流的力量是表面紧张(d sigma/d T ) 和温度坡度(dT/dr ) 在水池表面的温度系数的一个产品。不同焊接参数将在水池表面上改变温度分发和坡度,因此,影响 Marangoni 传送对流和焊接形状的力量。 | ShanDing LU H.Fujii K.Nogi | 2006 | Journal of Materials Science & Technology2006，22，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员