阶

Plant abele and Tibet willow as shelter forest belt or network, dress soil to meet the requirements for

"林－草"为主的复合种植体系是以银白杨、藏柳等作为第二阶地草地的防护林带或防护林网，在第二阶地客土并改良土壤，满足达到牧草等植物生长的土壤条件，种植优良牧草等饲草料，发展畜牧业。

From the view of the number of composition series and table subset of order or elementary abelian table algebra is depicted by making use of fundamental theorem on homomorphism of table algebra.

分别从合成列及表基的p阶、阶表子集的数目角度刻画了初等abelian表代数。

When G is a finite abelian group, the abelian group K_1, iscalculated completely mainly using the Bass-Milnor-Serre theorem, then the structure of K_1{ZG,|G|г is clear.

K_1。 3。利用Bass-Milnor-Serre定理，我们首先计算出了G是一个有限交换群时的K_1，也就计算出了(来源：e2ABC论文网www.abclunwen.com)K_1；当G是2阶和3阶循环群时，我们计算出了K_2=1，这个结果有待于继续推广，对于计算一些环的K_2群会有所帮助。

In addition, it's found that abridgment methods are comparative to Vector Subspace Method when the spectral image compression application is considered.

另外，还给出了三阶删节方法与"向量子空间法"在光谱图像压缩方面的特性比较，比较的结果发现，三阶删节方法要比"向量子空间法"更好一些。

It is found that the phase-conjugate fifth-order polarization beat is due to the interference between fifth- and fifth-order optical polarizations, the beat signal oscillates not only temporally but also spatially, and the measurement accuracy for laser absolute frequency could reach the same order of magnitude as the laser linewidth.

发现相位共轭五阶极化拍频是五阶非线性光学极化强度之间干涉的结果，拍频信号不仅进行着时间振荡而且同时进行着空间振荡，它对激光绝对频率的测量可达到与激光线宽同一量级的精度。

It is found that the phase-conjugate fifth-order polarization beat is due to the interference between fifth- and fifth-order optical polarizations,the beat signal oscillates not only temporally but alsospatially,and the measurement accuracy for laser absolute frequency could reach thesame order of magnitude as the laser linewidth.

发现相位共轭五阶极化拍频是五阶非线性光学极化强度之间干涉的结果，拍频信号不仅进行着时间振荡而且同时进行着空间振荡，它对激光绝对频率的测量可达到与激光线宽同一量级的精度。

Detailed Calculation formulae of zero, 1〓 and 2〓 order wave-making resistance have been derived and calculation programs have also been compiled.

本文深入研究了新细长船兴波阻力理论，导出0阶、1阶和2阶兴波阻力的具体计算公式，并成功地编制了计算程序。

The vertical axis of the switch has a surface of positive first differential, comprised of splines drawn between points if varying distance from a datum plane, and has along the horizontal axis a surface of a positive first differential and negative second differential, comprised of a combination of splines drawn between points of varying distance from the datum plane.

开关的竖直轴线的表面具有正的一阶微分，其由多个在离基准平面不同距离的点之间绘制的样条构成，并且沿水平轴线具有一个表面，该表面具有正的一阶微分和负的二阶微分，其由一组在离基准平面不同距离的点之间绘制的样条构成。

This yields first, second and third order accuracy in the case of the constant, linear and quadratic extrapolations, respectively.

使用的外插法有常数、线性以及二次的外插法，并将分别可以得到一阶、二阶以及三阶的精度。

The nth order perturbation corresponds to the nth order scatterings and reflections between the head and torso, therefore, for the conditions of the snowman model, the effects of the earlier three scatterings and reflections on HRTFs are important, and the contributions of the fourth-order and higher-order ones are neglectable.

由于 n 阶微扰在物理上是和头部和躯干之间的 n 重散射相对应的，因而本文的结果表明，在雪人模型的条件下，头部和躯干的前三阶多重散射对 HRTF 是重要的，四阶及以上散射可以忽略。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。