查询词典 parabolic

Vector expression is adopted in analyzing the relation between off-axis parabolic parameters and collimation property.

采用矢量的方法，分析了离轴量等参量和准直性能之间的关系。

The two-dimensional plane shock wave focusing with the parabolic reflectors in combustive gases is numerically simulated, and the ignition characteristics of the detonation initiation are investigated.

数值模拟了二维平面激波从抛物面上反射在可燃气体中聚焦的过程，研究了形成爆轰波的点火特性。

The two-phase Cu-50Cr alloy in air at 70─900℃ was corroded nearly parabolically, except at 900℃ when the instataneous parabolic rate constat decreased with time.

Cu－50Cr合金在700—900℃空气中的氧化结果表明，合金的氧化动力学在700和800℃遵循抛物线速度规律，在900℃其瞬时抛物线速率常数随时间而降低。

Tables of seconx dary fixed end moments for prismatic and haunched beams with straight and parabolic tendons have been prepared for use in practical applications, A method of using concordant pressure line for the elimination of secondary forces due to prestressing is introduc...

本文并介绍了采用协调压力曲线以消除因予加应力所引起的附加内力的方法，同时介绍了通过施工方法消除因收缩与蠕变所引起的附加内力的方法。文中并对按极限状态理论计算超静定予应力钢筋混凝土结构的问题作了一般性的探讨。

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。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了