| 1 | CT血管成像虚拟门静脉压力梯度(CHESS 1601):门静脉高压无创诊断的前瞻性多中心研究显示文摘目的建立并验证一种基于CT血管成像的预估门静脉压力梯度的计算机模型,命名为虚拟门静脉压力梯度(HVPG),使肝硬化病人门静脉高压的无创诊断成为可能。材料与方法在这项前瞻性多中心诊断试验(Clinical Trials.gov标志符:NCT02842697)中,2016年8月—2017年4月从3个大型肝病中心连续招募了102例符合条件的参与者(年龄21~75岁,平均47岁;包括男性68例,年龄21~73岁,平均44岁,女性34例,年龄24~75岁,平均52岁)。 | X.L.Qi W.M.An F.Q.Liu R.Z.Qi L.Wang Y.N.Liu. 胡芳(译) 杜明珊(校) | 2019 | 国际医学放射学杂志2019，0，2： | 31 |
| 2 | Multiscale and multiphysics explorations of the transient deposition processes and additive characteristics during laser 3D printing显示文摘Laser directed energy deposition(DED)involves complex physical processes,and the trial and error examinations are time consuming and cost expensive.The research paradigm can be reshaped using advanced phenomenological models via computing the spatiotemporal variations of the build features.In this work,multi-layer and multi-track laser DED of Ti-6 Al-4 V were systematically explored on multiple scales including the 1D track,the 2D layer and the 3D full build considering the complex transport of energy,mass,and momentum in the moving freeform molten pool.The results showed that convex,nearflat,and wavy builds were generated using gradually larger hatch spacings.The profiles of individual tracks and layers were extracted through the unique advantages of the model.The individual tracks exhibited various patterns and rotated with specific inclinations to form distinct layer profiles.The net increments of the deposit generated upon the printing of a new track during the continuous deposition process showed that the smaller hatch spacing caused higher overlap rate of horizontally adjacent tracks but lower remelting rate of vertically adjacent tracks in neighboring layers.The 3D numerical model was validated with corresponding experiments for various process conditions.The scientific findings can provide useful insights for further researches of DED. | H.L.Wei F.Q.Liu L.Wei T.T.Liu W.H.Liao | 2021 | Journal of Materials Science & Technology2021，，18： | 5 |
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