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    题名 作者 年代 出处 被引量
1The apparent contact angle of water droplet on the micro-structured hydrophobic surface显示文摘The apparent contact angle of Cassie-Baxter state water droplets can be calculated by the existing theoretical formula, but due to the defects of the micro-structured hydrophobic surface and some inevitable tiny disturbances in the experiment, Cassie-Baxter state water droplets will appear partly in Wenzel state, that is, the mixed state water droplets. In this paper, apparent contact angles of Cassie-Baxter state and mixed state water droplets on micro-structured hydrophobic surfaces are compared. The research shows that if the projected area fraction of water-solid F in the Cassie-Baxter formula is replaced by the local projected area fraction of water-solid F′, the apparent contact angles of water droplets in both Cassie-Baxter state and the mixed state can be calculated. Further experimental results indicate that the contact state of water droplets nearby the outermost three-phase contact line plays a more important role in determining the apparent contact angle. This conclusion is significant to the understanding of the apparent contact angle and wetting property.YANG ChangWei, HE Feng & HAO PengFei School of Aerospace, Tsinghua University, Beijing 100084, China 2010Science China Chemistry2010,53,4:8
2Simulation of the four-body interaction in a nuclear magnetic resonance quantum information processor显示文摘The four-body interaction plays an important role in many-body systems, and it can exhibit interesting phase transition behaviors. In this letter, we report the experimental demonstration of a four-body interaction in a four-qubit nuclear magnetic resonance quantum information processor. The strongly modulating pulse is used to implement spin selective excitation. The results show a good agreement between theory and experiment.LIU WenZhang ZHANG JingFu LONG GuiLu 2009Chinese Science Bulletin2009,54,22:5
3辐射阻尼在水的二维NMR SECSY和COSY谱中产生的谐波峰显示文摘在水的二维质子NMR自旋回波或J分解谱(SECSY)和相关谱(COSY)中,在间接检测的F_1维上我们观测到了用常规理论难以解释的谐波峰.这些峰在COSY谱上相隔一个或数个化学位移偏置的频率,证实了文献的结果,而在SECSY谱上则相隔半个频率,尚属首次发现.长期以来,COSY中的谐波峰引起了波谱工作者的困惑并且引起了争议.用我们所发展的辐射阻尼线形理论能对这些实验图谱作出满意的解释.毛希安 郭建新 1997自然科学进展(国家重点实验室通讯)1997,7,3:0
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