水合镁离子的分子动力学模拟研究

基于水合离子[M(H2O)m]n+的概念,利用Moldy分子动力学模拟并结合分子内相互作用势MCY来研究水中的镁离子.该模拟系统包括一个二价的镁离子和216个水分子,在温度为330K下,计算了系统内不同原子对之间的径向分布函数(RDF),模拟结果和实验值基本一致.而且从其径向分布函数可看出,镁离子的出现并没有使得镁离子周围的第一水化层水分子和第二水化层水分子之间的距离有明显的减少.     

夫兰克─赫兹实验中温度的选择

本文讨论了气体击穿、空间电行与温度的关系，给出了测定原子第一激发电位和电离电位曲线时选择温度应遵循的规律．     

电化学沉积Cu-In-Se薄膜

采用电化学沉积方法在钼箔上制备Cu-Se、In-Se和Cu-In-Se薄膜,对电沉积的工艺参数进行了测试,发现Cu-In-Se是一种诱导共沉积,虽然沉积膜不具备化学计量比,但具有一定的光电性能.     

高精度步进压印机热误差的建模分析

为了消除由紫外光曝光所引起的步进压印机的热误差，以提高压印机的套刻对准精度，运用逐步回归分析法选取了压印机上温度测量点的数量，将压印机上布置的温度传感器从15个减少到6个，并建立了压印机温度测量关键点处的温度与压头在x、z方向热误差关系的数学模型．实验结果与模型计算结果的对比分析表明，模型的热误差预测精度在x方向可以达到899／6，而在z方向可以达到939／6．应用表明，该方法是一种在压印机热误差建模中选择温度测量关键点的有效方法，可避免热误差建模过程中的变量耦合问题，从而提高了模型的精确性．     

具有不定位势Kirchhoff型Schrödinger-Bopp-Podolsky系统解的存在性

研究Kirchhoff型Schrödinger-Bopp-Podolsky系统,考虑位势函数V不定的情况。此时Schrödinger算子-Δ+V具有有限维负空间。利用Morse理论,得到Kirchhoff型Schrödinger-Bopp-Podolsky系统非平凡解的存在性。     

Influence of bistramide A on the twitch tension in rat atrial heart muscle

Bistramide A, a new toxin isolated from the UrochordateLissoclinum bistratum Sluiter, was applied to rat auricular heart muscle bundles. At a stimulation frequency of 0.2 Hz, the toxin induces a dose-dependent reduction of the stimulated twitch tension force; it decreases and shortens the duration of the plateau and the slow repolarizing phase of the action potential. In the control solution, switching from a stimulation frequency of 0.2 Hz to 1 Hz decreases the force with which a positive potentiation develops either at a maintained high frequency or after switching from 1 Hz to 0.2 Hz. Bistramide A reduces both the force evoked at 1 Hz and the potentiation. The data suggest that Bistramide A blocks Na⁺ conductance; inhibits Ca⁺⁺ channels in a time-and frequency-dependent manner; reduces Na⁺–Ca⁺⁺ exchange activity; but does not modify the ability of the sarcoplasmic reticulum to be refilled although the rate of Ca⁺⁺ accumulation is decreased.     

电化学原子层外延及Te,CD元素欠电势沉积研究

阐述了一种处延沉积化合物半导体的新方法－电化学原子层外延（ＥＣＡＬＥ）并对其基础欠电势沉积（ＵＰＤ）进行了讨论,着重研究了Ⅱ,Ⅳ族元素Ｃｄ,Ｔｅ的电化学欠电势沉积,根据电化学循环伏安曲线,研究了Ｔｅ和Ｃｄ在Ｓｉ－Ａｕ（１１１）基片上以及交替生长过程中ＵＰＤ沉积电位及相应覆盖度值,由此确定了在Ｓｉ－Ａｕ（１１１）衬底上交替沉积Ｔｅ,Ｃｄ原子层的方法,在此基础上,初步进行了多次交替沉积,并用ＡＦＭ与Ａ     

钝感火药装药膛内实际燃烧规律的研究

目的 研究钝感火药装药膛内的实际燃烧规律,方法 制备一种双基钝感火药,并在大口径火炮上进行射击实验,用内弹道势平衡的方法研究了该钝感火药装药膛内的实际燃烧规律,结果 采用钝感火药装药后,膛内实际燃烧的热平衡点参数向后移动,钝感 火药装药燃气生成函数可分别用三次函数和二次函数的拟合式表示,其膛内实际燃烧速度函数可表示为以相结压力冲量为自变量的指数函数或正比函数,结论利用内弹道势平衡方法研究钝感火药装     

On Riemann-Finsler geometry

The history of Finsler geometry is reviewed and briefly recent development in Finsler geometry and its application is completed systematically. Furthermore, an interesting open problem has been proposed in this field.     

Harmonic maps with potential from complete manifolds

Harmonic maps with potential from complete manifolds are considered. This is a new kind of maps more general than the usual harmonic maps relating to many interesting problems such as equilibrium system of ferromagnetic spin chain and Neumann motion. Aiming at the general properties, the author derives basic gradient estimates and then Liouville type results for these maps, which are interesting in constrast to those of the usual harmonic maps for the presence of potentials.