查询词典 power transmission

For a single machine infinite bus power system with STATCOM connected at the electrical mid point of the equivalent transmission line, a unified and extended linear state space system model is firstly formulated by linearizing around the typical operating point.

针对单机无穷大母线联络线中间带静止同步补偿器的电力系统，建立了统一的状态空间模型；并在此基础上，应用信息结构约束下的LQ最优控制理论和算法，得到输出反馈的STATCOM与机组励磁的最优分散协调控制器；应用数字仿真研究它们在系统受到大小扰动下的控制性能和特点，并与传统的电压偏差PID励磁调节器进行了比较。

A low-voltage power line channel model is built for studying the transmission performance of the scheme.

在模拟的低压电力线载波信道条件下，对调制解调方案进行了仿真。

Itis made up of a gearbox and moderate breeze gear wheel transmissionthat the MG400/900-3.3D type mining machine cuts the cuttingdepartment, cut the electrical machinery of cutting department andput to fix up horizontally in the rocker arm, the power that themotor outputs leans on a round of transmission of department ofgear wheel and planet round via the tertiary straight tooth, urgethe cylinder to rotate finally.

MG400/900-3.3D型采煤机截割部主要是由一个减速箱和四级齿轮传动组成，截割部电机放在摇臂内横向布置，电动机输出的动力经由三级直齿圆拄齿轮和行星轮系的传动，最后驱动滚筒旋转。

The C-band magnetically insulated transmission line oscillator has teen simulated by the three dimensional PIC code in order to study the influence of non symmetry excitation mechanisms on its output modes. It is found that the non symmetry excitation mechanisms, such as random emitting of cathode electron anti the long rise tunic and low magnitude of input voltage, could product higher order modes and reduce output power.

为理解磁绝缘线振荡器实验中频频出现的模式竞争问题，利用3维全电磁粒子模拟程序对C波段MILO的实验模型进行研究，探索各种非对称激励机制对产生微波模式的影响，结果显示：阴极电子随机发射、电压的慢上升前沿、较低的电压等因素都可导致非对称高阶模式的产生，并使输出微波功率大大降低。

This paper shows the mathematic models and the calculation methods of the transient simulation in port equation form with full consideration of the periodic part and the nonperiodic part of the short circuit current and put the transformer, transmission line and the infinite power source in consideration. In resistance style fault it has perfect flexibility.

本文在充分考虑到短路电流的周期分量、非周期分量及带有变压器、线路和无穷大电源的情况下，给出了端口方程方法的机网暂态仿真研究数学模型和求解方法，结合电阻型故障模型，使故障仿真具有很强的灵活性。

The result shows that, in the case of low power, it is important for the chirp to form the soliton and transmit in the abnormal and zero dispersion area, but it's bad for the pulse's transmission in normal dispersion.

结果表明，较低功率时，反常色散区和零色散区，初始啁啾对于孤子的快速形成和传输具有重要的作用，而位于正常色散区时，啁啾破坏了脉冲形状，不利于脉冲的传输。

According to the change of sampling pressures, the one of two operation ways is selected, which solve the contradiction between power consumption and accuracy and real-time of data; The wireless transmit adopting CRC check-up way improve the anti-interference ability of data transmission further; Mistake operation are effectively reduced by software design of system configuration by keys.

根据采样压力值的变化，进行两种运行模式的选择，解决了耗电量与数据实时准确的矛盾；无线传输采用了CRC校验的方式，进一步提高数据传输的抗干扰能力；系统设置按键输入的软件设计有效地较少了人为误操作。

The study on the transmission mechanism of power flow in complex coupling system, which aims at the optimum control of the system dynamic performance, is one of the most challenging and prospective work in the field of vibration and noise control.

基于传递功率流控制原理研究复杂系统的动态特性与最优设计，是目前振动噪声领域的前沿课题和发展方向。

The former firstly establishes state graph of power system, and then, with the use of the adjacency matrix and path matrix of the directed graph, fast finds out the key transmission sections suffering greatly from the outages of overload lines through simple calculation of matrix.

前者根据实时网络拓扑结构和潮流分布状态，在对初始电力网络简化、分区的基础上，利用有向图的邻接矩阵与路径矩阵，通过简单的矩阵运算，快速识别出与过载线路相关的关键输电断面；后者直接利用系统各支路的阻抗，从图论算法的基本思想出发，搜索最易遭受大负荷转移的关键传输路径，从而将安全性分析目标从整个网络缩小到某些关键的输电线路。

The calculation formulae for the transmission coefficient of the plane wave incidence to Gaussian rough surface of the layered medium was derived in combination with the power spectrum of Gaussian rough surface.

采用高斯粗糙面来模拟实际的分层介质粗糙面，结合高斯粗糙面的功率谱导出了平面波入射高斯分层介质粗糙面的透射系数计算公式。

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％。