以树状河系为研究对象，分析其空间特征，建立基于图论的水系网矢量模型。
This paper analyzed the spatial characteristics of tree-like river networks, and built vector model based on graph theory.
将PARK变换引入到空间矢量调制矩阵变换器中，建立了矩阵变换器的线性定常电路模型。
The linear time invariant equivalent circuit model is established by introducing the PARK transformation to the space vector modulated matrix converter.
用合适的状态空间邻近矢量进行非线性局部分析，即使没有基音周期估计，短时预测器同样能建立长时相关性模型。
With an appropriate state space neighbour for the nonlinear local analysis, the short_delay predictor is also able to effectively model the long_term correlation without pitch estimation.
建立了三相异步电动机在旋转坐标系下的数学模型，论述了空间矢量脉宽调制技术原理。
The mathematical model of three-phase asynchronous motor in rotating coordinate system is established, and PWM technology of space vector is discussed.
同时，根据所建立的矢量数据结构，我们研究了一些空间分析算法，如最短路径算法等。
With the vector data structure created, we study a lot of spatial analyze arithmetic, such as the shortest path arithmetic.
导出了矩阵变换器的交-交直接变换控制规律和双空间矢量PWM调制策略，建立了交-交直接变换控制方式下矩阵变换器的数学模型。
The AC-AC direct transformation control and the double-space-vector PWM scheme of the matrix converter are deduced, mathematic model of space vector modulation (SVM) matrix converter is built.
基于空间曲面共轭原理，确定齿轮切齿矢量关系，建立了螺旋锥齿轮的齿面矢量方程。
Based on the conjugation theory of space curved surface, the vector relation of gear cutting is ensured. Tooth vector equation of bevel gear is established.
建立了对基于电压空间矢量pwm的三相高功率因数整流器实现电流稳态无差拍控制的设计准则。
Set up the circuit design criterion for the steady - stage deadbeat control to the line current of a three - phase high-power-factor rectifier based on voltage space-vector PWM.
采用D-H后置法建立了4R机器人运动方程，建立机器人执行机构在空间相对位置关系的数学模型，由此可解出手部位置和用单位矢量方向余弦表示的姿态。
A kinematics model by post D-H method for 4R-robot was offered in this paper, which derived the manipulator finger position and its attitude with unit vectors of direction cosine.
从高级信息的角度来描述图像语义，建立图像语义的特征矢量空间和语义划分的结构关系，实现图像与语义值的结构表达。
In order to explain and calculate the image semantics, the feature vectors and the semantic partition are constructed in structure related.
基于空间曲面共轭原理，确定齿轮切齿矢量关系，建立了螺旋锥齿轮的齿面矢量方程。
Based on the conjugation theory of space curved surface, the vector relation of gear cutting is ensured.
根据不同类型的矢量球波函数，建立无源各向同性球层内以及自由空间内的电磁场在球坐标系下的级数表达式。
In source-free plasma anisotropic medium, the electromagnetic fields can be expressed as integral of the first and the second spherical vector wave functions.
根据不同类型的矢量球波函数，建立无源各向同性球层内以及自由空间内的电磁场在球坐标系下的级数表达式。
In source-free plasma anisotropic medium, the electromagnetic fields can be expressed as integral of the first and the second spherical vector wave functions.
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