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电流变液研究进展及最新动态——第5届国际电流变液,磁悬浮体及相关技… 总被引:15,自引:0,他引:15
通过评介第5届国际电流变液、磁悬浮体以及相关技术研讨会,指出电流变液和磁流变液的应用研究有重要进展,磁流变液的剪切应力比电流变液大一个数量级,近来又受到重视,有机理研究中,要注意电流变液的表面效应,损耗对电流变效应的影响,本文还归纳了一些电流为液材料设计的思路。 相似文献
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用光学方法研究玻璃微珠电流变液颗粒间的相互作用 总被引:1,自引:0,他引:1
运用一套适合研究颗粒间相互作用的双光镊系统,通过对粒聚集时间的测量,得出颗粒聚集时间和电场的平方成反比。这是第一次用电流变液颗粒在动态情况下直接验证电偶极子对间的相互作用。发展了一套使用高速CCD摄像机进行扩散波谱(DWS)测量的方法,首次实时测量具有颗粒结构的非各态历经体系的自相关函数,以研究电流变液机理,得到了玻璃微珠电流变液的结构响应时间和力和响应时间;测量了不同电场下体系相关函数的特征衰减时间随时间的变化。在不同电场下测量扩散系数可以反映出相互作用力与电场的平方成正比。 相似文献
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Tunnelling of Two-Level Atoms in Two-Photon Mazer: Atomic Coherence Effect and Statistics of Cavity Fields 下载免费PDF全文
Tunnelling of a two-level atom is investigated in the two-photon mazer when the atom is initially prepared in a coherent superposition state and the cavity in various quantum states. For a strong coherent field, the tunnelling exhibits more regular oscillations but less remarkable switch effect than that in the one-photon mazer. It is discovered that in the presence of atomic coherence, the transmission probabilities in the ultracold regime are significantly different when the cavity field is initially in coherent, squeezed vacuum, even cat and odd cat states, respectively. 相似文献
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The resonance effect of microcrystalline cellulose/castor oil electrorheological (ER) suspensions was studied in a compressed oscillatory squeeze flow under external electric fields. The resonance frequency first increases linearly with increasing external field, and then shift to high-field plateau. The amplitudes of resonance peak increase sharply with the applied fields in the range of 0.17-1.67 kV/mm. The phase difference of the reduced displacement relative to the excitation force inverses in the case of resonance. A viscoelasticity model of the ER suspensions, which offers both the equivalent stiffness and the viscous damping, should be responsible for the appearance of resonance. The influence of the electric field on the resonance frequency and the resonance hump is consistent qualitatively with the interpretation of our proposed model. Storage modulus G' was presented for the purpose of investigating this influence. 相似文献
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运用一套适合研究颗粒间相互作用的双光镊系统,通过对颗粒聚集时间的测量,得出颗粒聚集时间和电场的平方成反比.这是第一次用电流变液颗粒在动态情况下直接验证电偶极子对间的相互作用.发展了一套使用高速CCD摄像机进行扩散波谱(DWS)测量的方法,首次实时测量具有颗粒结构的非各态历经体系的自相关函数,以研究电流变液机理,得到了玻璃微珠电流变液的结构响应时间和力的响应时间;测量了不同电场下体系相关函数的特征衰减时间随时间的变化.在不同电场下测量扩散系数可以反映出相互作用力与电场的平方成正比. 相似文献