It will be very helpful to understand how the aberrations affect the course of three - wave mixing , such as the change of conversion efficiency , the distribution of intensity and phase 重点研究了位相畸变光束的倍频过程中,谐波的位相分布是否能与基波的波前畸变有一定的保真度,二者关系如何。
For example , to the frequency splitting between fundamental wave and second harmonics , the filter daub6 and cqf12 do well in extract the fundamental wave , whereas the filter daub5 and daub6 do well in extract the second harmonics 如对于基波与二次谐波的分频, daub6和cqf12滤波器对基波的滤波效果较好,而daub6和daub5对于二次谐波的滤波效果较好。
The magnetic field requirement of the sth harmonic gyroklystrons over cyclotron resonance masers ( crms ) would be reduced by a factor of s relative to operate on the fundamental cyclotron frequency , so that the amplifier could be applied to highly mobile millimeter wave radar systems 基于电子回旋谐振脉塞原理工作的谐波回旋速调放大器的工作磁场强度是基波的1 / s ( s是谐波数) ,因而能适用于机动性较高的军用毫米波雷达系统。
This way has been improved in this paper . whole - cycle fourier differential algorithm is adopted in record start - up to satisfy the real - time requirement . the least squares method is applied to extract the fundamental frequency component in location which has low computing speed but high precision 故障录波启动采用全波傅立叶差分算法,以满足启动实时性要求,测距所需基波的提取采用最小二乘法,适应其精度要求高而实时性无要求的特点。
Based on the large disturbance equation and using the measured power angle as an observation argument in an identification algorithm , the electrical parameters and mechanical parameters are obtained . in this thesis , micro - computer testing systems for synchronous generator is analyzed . withmcs - 196 series single chip micro - controller of high price performance ratio , a high precision , intelligent instrument for automated testing has been developed 设计了同步发电机参数测试仪器,完成了利用发电机定子电压电流的波形,辨识发电机参数的计算机软件,该装置运用锁相环技术自动跟踪和获取电量频率,进行交流采样,利用傅立叶算法求得电量基波的幅值、有效值,从而可获得三相有功功率、三相无功功率以及功率因数。
Secondly , because of the faultiness of these algorithmic routines of dissipation factor in existence , this dissertation puts forward an improved correlation function algorithm based on wavelet analysis , and the improved algorithm focuses on two lesding aspects : one is the methods to reduce noise and distill the fundamental , the other is the means to reduce the errors resulted by frequency fluctuating 其次针对现有介损计算方法的不足,提出了一种基于小波变换理论的改进相关函数法的介质损耗值计算方法,主要从去噪、提取基波的方法以及降低由于电网频率波动所造成的误差两个方面来考虑。并对此方法进行了仿真分析和验证了改进算法的优越性。
In the section 1 , we have introduced the background and the recent advance of the flattened gaussian beam ; in the section 2 , for the first time , we have calculated the type - i and type - ii shg conversion efficiency and simulated curves versus the crystal length , the pumping light polarization rate , the order of the flattened gaussian beam and the pumped power intensity , we obtain ed that the highest efficiency was influenced by the order and the polarization rate of the pumped flattened gaussian beam 从三波耦合方程及clbo晶体的光学特性出发,讨论了以平顶高斯光束入射时稳态的三波耦合方程的大信号倍频解(包括类及类相位匹配的倍频解) 。计算了其在clbo晶体上的倍频转换效率与晶体长度,基波偏振分量比,基波阶数及泵浦波强度之间的相互影响关系曲线。得出影响平顶高斯光束的最高转换效率的因素是基波的阶数n和泵浦波的偏振分量比d 。
Different measurement standard produce the estimate for the meter ' s measurement error . the theoretic analysis shows that the non - linear load is harmonic source , and the harmonic produced by it is transformed by part of basic wave absorbed by it from power system , therefore , traditional measurement mode has some 通过对非线性负荷的理论分析表明,作为谐波源,非线性负荷所产生的谐波是吸收基波的一部分转化而来,从而说明传统的计量方式具有不合理性,提出相应的解决方法和对策,并建议一种新的电能计量方式供同行研究探讨。