薄膜多层混合电路图设计软件的开发和应用

本文根据薄膜多层混合电路的特点，对印制板电路布图设计软件ＰＲＯＴＥＬ进行二次开发，研制出适于薄膜多层混合电路布图设计的软件ＰＲＯＴＥＬ－ＳＵＮ，应用软件对控制信号发生器实施薄膜四层布线的布图设计，布通率达到１００％。     

国内外汽车音响IC代换对照

<正> 本表资料共收集了7个大类、300余种进口及国产汽车内使用的音响集成电路代换型号,它们当中绝大多数可直接互换,只有少数几种型号在代换时应作适当改动。 表中“电路类别”栏内的字母意义是:A代表AM调谐、中放电路和FM中放、噪声抑制电路,B代表立体声解码电路,C代表单、双通道音频功放电路,D代表前置放大电路,E代表其它功能电路,F代表电机稳速电路,G代表自动选曲电路。     

空腔靶X光发射特性研究

在“神光”装置上对几种类型的空腔靶进行了激光打靶实验,我们利用亚千X光透射光栅谱仪(TGS)、针孔相机(PC)、以及平响应X光二极管(P-XRD)对激光等离子体X光发射特性进行了研究。基本上弄清了空腔靶源区、向爆区X光发射特性。为激光间接驱动内爆的理论数值模拟和靶的优化设计提供了实验依据。     

Investigation of hydrogen bonding in neat dimethyl sulfoxide and binary mixture (dimethyl sulfoxide + water) by concentration-dependent Raman study and ab initio calculation

In this study,our vibrational spectroscopic analysis is made on hydrogen-bonding between dimethyl sulfoxide and water comprises both experimental Raman spectra and ab initio calculations on structures of various dimethyl sulfoxide/water clusters with increasing water content.The Raman peak position of the v(S=O) stretching mode of dimethyl sulfoxide serves as a probe for monitoring the degree of hydrogen-bonding between dimethyl sulfoxide and water.In addition,the two vibrational modes,namely,the CH 3 symmetric stretching mode and the CH 3 asymmetric stretching mode have been analysed under different concentrations.We relate the computational results to the experimental vibrational wavenumber trends that are observed in our concentration-dependent Raman study.The combination of experimental Raman data with ab initio calculation leads to a better knowledge of the nature of the hydrogen bonding and the structures of the hydrogen-bonded complexes studied.     

Numerical simulations of the impact of wavefront phase distortions of pump on the beam quality of OPA

<正>A numerical model of optical parametric amplification(OPA) is introduced to investigate the impact of wavefront phase distortion of pump on the beam quality of signal.Numerical results show that the unidentical walk-off directions of the pump and the idler waves are the main factors leading to the transfer of wavefront phase distortions of the pump to the signal,and by reducing the angle between the two directions,the beam quality factor(M~2) can be greatly decreased and hence the good beam quality of the signal can be maintained.     

搅拌器内部流动的无网格法三维数值模拟

本文将移动粒子半隐式法(MPS)的基本算法由二维扩展至三维。将圆柱坐标系引入到初场粒子的布置中,避免了在笛卡儿坐标系下处理不规则形状(如斜边或曲边)问题时粒子初场布置困难和精确度较低的问题,改善了对计算边界条件表达的精确性。引入移动边界模型,对直叶片搅拌器的内部流动进行了三维数值模拟。还提出了一种新的初始粒子布置简易方法,明显简化粒子初始布置时的复杂程度,提高了对三维复杂几何形状问题的可操作性。     

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针对准中性Vlasov-Poisson系统中多尺度物理参数共存的问题开展研究,采用渐近保持格式推导出与Vlasov方程相耦合的Poisson方程。数值模拟了一维等离子体在真空中的膨胀,比较了渐近保持PIC算法与传统PIC算法模拟结果的异同。结果表明：两种算法在满足多尺度中小尺度量限制的前提下,其结果保持高度一致;且在克服小尺度量束缚时,渐近保持PIC算法依然可以正确地模拟等离子体的物理行为,大大节省了计算时间。