查询词典 transformation equation

The equilibrium equations under local coordinate are obtained through Euler angle transformation. In the modeling of warp, otter door is treated as the end node. The equilibrium equation of otter door is established through d\'Alembert\'s principle. It provides the end boundary condition of the dynamic model of warp.

通过欧拉角的转换关系获得了曳纲微元段矢量动力平衡方程在曳纲局部坐标系下的方程组形式；在建模过程中，将网板视为曳纲的尾部节点，根据达朗伯原理建立了网板的平衡方程，并将其作为曳纲模型的尾部边界条件。

Firstly, based on the wave equation, determining reasonably its initial boundary condition, the paper establishes a computer diagnostic model of oil pumping mechanical well, the damping factor in the model has been reasonably determined, the implicit difference solutionis conducted to the model by changing of step width expression difference solves, and the half analytical solution is explored to the model - fine integral method; and realizes the transformation from dot indicator diagram to indicator diagram of any section.

首先从抽油机井计算机诊断技术的理论基础入手，考虑多级抽油杆连续性，建立了粘滞阻尼波动方程，合理确定模型中的阻尼系数，采用无条件稳定的隐式差分法及半解析方法求解方程，获得抽油杆柱任意断面和抽油泵处的示功图。

With the method of the Lie group transformation,the symmetry of the equation governing one dimensional finite strain consolidation is discussed and,from the point of the symmetry,the feasibility to obtain the analytical solution of these nonlinear partial differential equations is discussed.

介绍了基于连续介质理论和混合物理论的大应变固结理论的发展，论述了两种一维大应变固结理论之间的差异及其一致性。

The asymptotic estimations of solution of initial value problem are obtained for Dirac equation by use of the transformation matrix operator in this thesis.

本文运用平移算子，得到了Dirac方程初值问题解的渐近估计。构造了一个整函数ω，其零点集合与具有一般两点边界条件的Dirac特征值问题的特征值集合重合。

In this paper, the modeling theory of multi-rigid-body dynamics was thoroughly investigated in order to make up the shortcoming in the above modeling method. The major research achievements are as follows:①Based on the matrix of direction cosine between the body-fixed base and the reference base, and Poisson equation of a rigid body rotating, the coordinate transformation method for the modeling of treelike multi-rigid-body dynamics is derived. The method is very routinization and easy to use the computer to carry on the symbol derivation.

本文针对上述建模方法存在的不足，深入地研究了多刚体系统动力学的建模方法，并将所研究的新方法应用于惯性振动设备的建模，取得的主要研究成果如下：①基于刚体连体基关于参考基的方向余弦矩阵和刚体转动的Poisson方程，导出了建立树形多刚体系统动力学方程的坐标变换法，其过程极其程式化，便于利用计算机进行符号推导。

Results The equivalent matrix equation is derived by the matrix transformation method.The parameter iterative algorithm and the sufficient and necessary conditions for the convergence are given.

结果基于矩阵变换方法导出了矩阵方程的等价形式，并构造出参数迭代格式，得到了格式收敛的充要条件。

We analyse the Lewy theorem and the provement idea of the theorem, and find the equation (7)and (8)are not equivalent under the reversible transformation, this lead to the absurdity in the provement does not come into existence .

分析Lewy定理及定理的证明思想，发现在证明中所述的可逆变换下，方程（7）与（8）并不等价，导致Lewy定理证明中归谬不成立。

GPS precise positioning, baseline precision, general normal equation, decorrelated and admissible integer transformation, ambiguity integer solution, success rate, admissible integer estimation, pull-in region, probability density function

GPS 精密定位，基线精度，通用法方程式，降相关的可容许整数变换，模糊度的整数角，成功率，可容许整数估计，归整域，概率密度

The one-dimensional time-dependent Schrdinger equation was numerically solved with the symmetric splitting of the short-time exponential propagator and the fast Fourier transformation, and influence of intensity and pulse with on ionization of linear multi-ation molecular ion in two-color laser fields was researched.

利用短时指数传播子对称分割法和快速傅里叶变换技术，数值求解了一维含时Schrodinger方程，探讨了双色激光场中激光的基波和谐波强度之间的不同配比以及脉宽对线性多原子分子离子电离的影响。

First, the paper reviews the development and research of AC transfer speed system, introduces the different control strategy of transfer speed system for asynchronous motor, and discusses the basic principle of vector control system for asynchronous motor in detail,including the mathematics model and coordinate transformation of asynchronous motor, the fundamental equation of vector control, the estimation method of rotor flux, the system structure of vector control etc. Then, the paper lays stress on the fundamental principle, control algorithm and realization method in TMS320LF2407 of space vector pulse width modulation technology.

本文首先简述了交流调速系统的发展和研究重点，介绍了异步电机调速系统的不同控制策略，详细论述了异步电机矢量控制系统的基本原理：异步电机的数学模型和坐标变换、矢量控制的基本方程式、转子磁链的观测方法、矢量控制的系统结构等，并重点分析了空间矢量脉宽调制技术的基本原理、控制算法以及在TMS320LF2407中的实现方法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。