查询词典 parabolic cusp

The ground-state energy and the average number of virtual phonons around the electron of a hydrogenic impurity confined in a parabolic quantum dot are calculated using the squeezed-state variational approach,which is based on two successive canonical transformations and uses a displaced-oscillator type unitary transformation to deal with the bilinear terms,which are usually neglected.

李伟萍 内蒙古赤峰学院物理与电子信息工程系，赤峰 024000肖景林内蒙古民族大学物理与电子信息学院，通辽 028043采用基于逐次正则变换的变分方法，利用单模压缩态变换处理包含声子产生湮灭算符的双线性项，研究了抛物量子点中束缚极化子的性质。

And then hp version discontinuous space-time finite element methods is used for a kind of Volterra integrodifferential parabolic equation with weakly singular kernel.The uniqueness of the approximate solution of the equation and the error estimate for time in L_2 norm and space in L_2 norm is obtained.

其次利用hp间断有限元方法研究一类Volterra偏积分微分方程，证明了离散解的存在唯一性，并得到了时间L_2、空间L_2模的指数型误差估计。

Medium parabolic profile and heavy cutter density provides high ROP in medium hard formation with medium compressive strength and small interbedded layers.

中等抛物线冠部和较密布齿使其在中等抗压强度的中硬地层以及薄夹层中能有良好的钻井速度。

This dissertation gives necessary and sufficient conditions for 2-torus parabolic maps to be invertible,which improves P.

本文首先给出了二维环面上抛物型映射可逆的充分必要条件，完善了P。

The objective was to analyze allelopathic effect of oxygenic terpenoid on barnyardgrass. The results show that the main effects ofCarveol,Carvone,Menthone andCarvyl acetate have an downward parabolic curve, whileCedrol shows the opposite.

各单因子的主效应分析结果表明：香芹醇、香芹酮、薄荷酮和香芹基乙酸酯的主效应曲线均为开口向下的抛物线，而雪松醇为开口向上的抛物线。

We also consider a parabolic system in a three species mutualistic modelIt is shown that any solution with time delays is global.

我们还研究了另一类三种群单链环状互惠抛物模型并考虑了具时滞的问题。

Elovich equation,zero order equation ,first order equation and parabolic equation was used to describe the nonexchangeabe k releasing process.Then the best model was selected to describe nonexchangeable k release and its velocity.

利用Elovich方程、零级方程、一级方程和抛物线扩散方程对土壤的累积释放量进行模拟，研究探讨了描述土壤非交换性钾释放及其速率较为理想的动力学模型。

The process of evolution, especially that of nonlinear evolution, of C-type instability of laminar-turbulent flow transition in nonparallel boundary layers are studied by means of a newly developed method called parabolic stability equations.

提出用抛物化稳定性方程新方法，研究非平行边界层从层流向湍流转捩的C型失稳的演化过程，特别是非线性演化问题。

Covering the chemistry of liquid-phase oxidation of organic compounds, this book includes the results of analysis with the parabolic model as applied to reactions of peroxyl radicals with C-H bond of different organic compounds.

在有机化学和生物学方面的氧化和抗氧化剂有機化学と生物学の面でのアンチオキダントと酸化します包括有机化合物的液相氧化的化学，这本书象适用于peroxyl 激进主义者与不同的有机化合物的C-H 契约的反应的那样用抛物线的模型包括分析的结果。

The saturation equals 1 in saturated region.The piezometric tube waterhead equals position head by neglecting the effect of capillarity in unsaturated region.So the nonlinear parabolic equation of seepage flow will degenerate to Laplace equation about piezometric tube waterhead in saturated region and convective equation about saturation in unsaturated region respectively.

将渗流域分为饱和区与非饱和区，为避免研究复杂的多相流问题，可以认为非饱和区是与大气相通的，则测压管水头中的压力与大气压相等，使测压管水头等于位置水头，从而渗流控制方程在两个区域中分别退化为关于测压管水头的拉普拉斯方程和关于饱和度的对流方程。

It has been applied widely in a number of countries and proven to be an important regulative procedure design in the modern public decision making system.

它曾在很多国家的决策中得到广泛的应用，并被证实是现代公共决策体制中一项重要的规范性程序设计。

The manganese protein is then transported to the periplasm having first trapped its manganese.

而后锰蛋白转移到细胞外周质，开始对锰原子进行捕获。