查询词典 nonlinearity

Considered the characteristics of extreme nonlinearity and random for power drive systems, several novel control strategies as following for the nonlinear coupled oscillation are studied this thesis.

考虑耦合振荡的高度非线性、随机性等特点，本文研究了以下几种新型振荡控制策略：根据适应控制的思路，本文提出了反振荡适应控制方案，用电气控制手段解决机械及建筑结构的振动问题。

On the Effects of Noise Cross Correlation,Nonlinearity and Geometric Phases in Lasers

中文题名激光中噪声互关联，非线性和几何相效应的研究

The proposed method can dynamically estimate the nonlinearity of the mixing model and adapt to the cumulative probability function of source signals.

本文中所提出的方法可以同时动态估计混合模型的非线性和源信号的累积概率密度函数。

Shield tunnelling machine;composite strata;nonlinearity;cutterhead driving torque;stall

盾构机；复合地层；非线性；刀盘驱动转矩；堵转

By considering torque characteristics of variable-frequency motors and mesh stiffness as well as backlash nonlinearity in gear transmission,a dynamics model for the cutting system of shield tunneling machine with redundant drives was established. The fluctuation characteristics of torque loads and dynamic cutterhead driving torque in composite strata were analyzed.

复合地层掘进扭矩载荷突变是造成盾构机掘进过程中堵转停机的直接原因，考虑盾构机刀盘驱动变频调速电机特性、转矩传递过程中齿轮啮合刚度及齿侧间隙等非线性因素，建立冗余驱动的盾构机刀盘切削系统机电耦合动力学模型；针对典型复合地层地质条件，对盾构机在上软下硬地层掘进过程中刀盘驱动转矩动态特性进行仿真分析。

In the control process of air conditioning systems, it is not easy to keep the objects to be desirably controlled because of their obvious features such as time lag, time-variation and nonlinearity.

在空调系统的过程控制中，由于控制对象的时滞、时变、非线性的特征比较明显，导致被控对象不容易控制。

To resolve the influence of uncertainty and nonlinearity on the high-precision turntable servo system, an inverse control method based on diagonal recurrent neural network is presented.

针对转台伺服系统中存在的不确定性和非线性因素，提出一种基于对角回归神经网络(diagonal recurrent neural network，DRNN)的逆控制方法。

As the special characteristic of nonlinearity, several notions are introduced and used in this paper, such as differential manifold, vector field, diffeomorphism, tangent space, topological equivalence. Stable manifold and unstable manifold are also introduced.

针对非线性的特殊性，本文专门介绍了非线性中几个比较特殊的概念，如微分流形、向量场、微分同胚、切空间以及等价关系等，对稳定和不稳定流形也作了介绍。

By the nonlinearity of the propagation medium-air, the audible sound with high directivity can be produced.

利用超声波在空气中传播的非线性交互作用，可以产生高指向性的可听声音。

Compared with the known results,the nonlinearity is allowed to change sign and is involved with the first-order derivative explicitly.In particular,the boundary condition includes the Dirichlet boundary condition and Robin boundary condition.

与现有工作相比，我们所考虑的动力方程不但非线性项可变号，而且包含一阶导数项，所考虑的边值条件更具一般性，比如可以包含Dirichlet及Robin边值条件等。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。