微分的

Axisymmetric elasticity problem of cubic quasicrystal is reduced to a solution of a partial differential equation with higher-order by introducing displacement function .

本文通过引入位移函数使得立方准晶的轴对称弹性问题化为求解一高阶偏微分方程。

The unsteady problem is mathematically reduced to a partial differential equation ofsecond order.

该非定常问题归结为一个非线性二阶偏微分方程的求解问题。

The method of regression line has used the differential coeffi- cient extreme value...

回归直线法利用了微分极值原理，用它确定断电瞬间绕组的温度比采用其它方法更准确一些。

The design is changed to a series of scalar quantity design problems, and the amount of calculation and the computational complexity are reduced.

对模型进行模态分析，采用独立模态控制法，把原问题进一步降维，成为一系列标量微分方程的优化设计问题。

Firstly, we analysize the boundary value problem for linear singular system, several properties for linear singular system are given, and then the existence for boundary value problem to nonlinear singular system is proved by using the previous properties discussed and Schauder's fixed point theorem.

接着，利用Banach不动点定理，研究了Volterra型广义积分微分系统边值问题解的存在唯一性，最后给出了几个推论。

This is a phenomenon of non-linear self-excited vibration.

导出了在这些因素联合作用下悬臂式转子运动的四个非线性微分方程。

We reproduce the well-established and self-generated magnetic field equations, which are nonlinear partial differential equations.

我们证明该非线性偏微分方程具有塌缩波解，并用标准的数值方法解此方程来验证分析结果。

It gets correct results with very few calculations and it is self-starting.

使用了一个特殊二阶微分方程的数值解法，该方法精度较高，计算量很小，而且可以自启动。

The diurnal, semidiurnal and shallow-water tides and tidal currents in che Bohai Sea are computed using finite-difference method based on two-dimensional nonlinear tidal wave equations.

本文采用二维非线性潮波微分方程组的有限差分方法同时计算了渤海全日、半日和浅水潮。全日和半日潮计算结果与实测符合良好。

Microtonality : presence of intervals smaller than the semitone .

微分音：存在比半音程更小的音程。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。