查询词典 harmonic integrals

On the basis, this paper provide two harmonic current detect methods, and do deep research on the using zero current divided method to achieve harmonic current and instantaneous reactive current real time detecting method.

在此基础上，提出了两种基于该理论的谐波电流检测方法，并对采用零线电流分离法实现的谐波电流及瞬时无功电流的实时检测方法进行了深入研究。

Active power filter ; instantaneous harmonic current detection ; harmonic measuring ; virtual instrument ; LabVIEW

有源滤波器；瞬时谐波电流检测；谐波测量；虚拟仪器； LabVIEW

The paper introduces an improved harmonic and reactive current detecting method based on there-phase reactive current using instantaneous reactive power theory. By using matlab, simulation model is built, and the results show that this model can exactly detect harmonic and reactive current in time and it is feasible in DSP system.

本文在三相瞬时无功功率理论的基础提出了一种改进的单相无功电流检测算法，并建立了仿真模型，仿真结果表明：该算法可以及时、准确地检测出三相电路中的谐波电流和无功电流，同时也验证了此算法在DSP系统中的可行性。

Compare three strain harmonic test method which is based on the instantaneous harmonic and reactive power theory.

比较了基于瞬时无功功率理论的三种谐波检测方法。

In this paper, a harmonic detection method based on instantaneous reactive power theory is discussed. And then, MATLAB models for the harmonic detection are built and the simulations are carried out.

本文分析了基于瞬时无功功率理论谐波检测方法的基本原理，建立了基于MATLAB的谐波检测系统模型并进行了仿真分析。

By combining with Poincare mapping and phase plane plot, the simple harmonic, non-harmonic monocycle, subharmonic, quasi-periodic and chaotic response arised in the system under different backlas...

通过分析各齿轮副的动载荷系数变化规律，讨论了各齿轮副啮合状态在非冲击、单边冲击以及双边冲击状态之间的转化过程和齿侧间隙的关系。

Especially, we derive the Pohozaev identity for p-harmonic equation from which we obtain the corresponding nonexistence of nontrivial solution for p-harmonic equation with critical growth.

本文考虑了几类椭圆方程的Pohozaev恒等式，特别是对p-调和方程在两种边界条件下的恒等式作了详细的演算，并利用这些恒等式得到了一些解的非存在性结果。

A new method for assessing harmonic impedance and the harmonic emission level is preseented, which is based on the partial least-squares regression.

提出了一种基于偏最小二乘回归的系统谐波阻抗及用户谐波发射水平的估计方法。

The new method is given to design the optimum profile modification curve design The effects of optimum profile gear in improving the dynamic performance of gear transmission are verified in the Gear Dynamic Performance Test Rig In this dissertation, the main study contents and creative results are shown as following: The influences on the gear transmission system caused by the gear's accumulated error (periodic error and harmonic error) are theoretically studied. A new method is developed to simulate the gear's harmonic error by using the 2-order MARKOV process A simulated model of the dynamic performance which is excited by the gear's accumulated error is obtained.

本文在前人大量研究的基础上，结合作者承担的国家自然科学基金项目"齿轮传动动态系统辨识与三维修形研究"和山东省自然科学基金项目"齿轮传动动态性能仿真及结构参数、齿形的优化修形"，采用理论和试验相结合的新思路，系统地研究了齿轮传动的动态性能，建立了能正确描述齿轮传动系统动态性能的仿真模型和系统辨识模型，给出了确定齿轮传动轮齿修形曲线的优化设计方法，利用自行研制的齿轮传动动态性能试验装置，验证了优化修形齿轮对提高齿轮传动动态性能的突出作用。

The emulation result shows that the error of polarizer rotation angle almost does not influence nonlinearity when elliptic polarization of laser beams exists; when the error of rotation angle of polarizing beam splitter exists, the second-harmonic nonlinearity caused by the error of polarizer rotation angle will not increase, but the first-harmonic nonlinearity will increase greatly.

仿真结果表明，当存在激光束椭圆偏振时，检偏器旋转误差对非线性误差的影响很小；当存在偏振分光镜旋转误差时，检偏器旋转误差引起的非线性误差不增加二次谐波分量，但增大了非线性误差一次谐波分量，严重影响非线性误差的大小，当偏振分光镜旋转误差为3°时，检偏器旋转误差从0°增加到5°，非线性误差从0.14 nm增大到0.97 nm。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"