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 重點研究了位相畸變光束的倍頻過程中,諧波的位相分布是否能與基波的波前畸變有一定的保真度,二者關系如何。
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 如對于基波與二次諧波的分頻, daub6和cqf12濾波器對基波的濾波效果較好,而daub6和daub5對于二次諧波的濾波效果較好。
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 基于電子回旋諧振脈塞原理工作的諧波回旋速調放大器的工作磁場強度是基波的1 / s ( s是諧波數) ,因而能適用于機動性較高的軍用毫米波雷達系統(tǒng)。
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 故障錄波啟動采用全波傅立葉差分算法,以滿足啟動實時性要求,測距所需基波的提取采用最小二乘法,適應其精度要求高而實時性無要求的特點。
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 設計了同步發(fā)電機參數測試儀器,完成了利用發(fā)電機定子電壓電流的波形,辨識發(fā)電機參數的計算機軟件,該裝置運用鎖相環(huán)技術自動跟蹤和獲取電量頻率,進行交流采樣,利用傅立葉算法求得電量基波的幅值、有效值,從而可獲得三相有功功率、三相無功功率以及功率因數。
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 其次針對現有介損計算方法的不足,提出了一種基于小波變換理論的改進相關函數法的介質損耗值計算方法,主要從去噪、提取基波的方法以及降低由于電網頻率波動所造成的誤差兩個方面來考慮。并對此方法進行了仿真分析和驗證了改進算法的優(yōu)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 從三波耦合方程及clbo晶體的光學特性出發(fā),討論了以平頂高斯光束入射時穩(wěn)態(tài)的三波耦合方程的大信號倍頻解(包括類及類相位匹配的倍頻解) 。計算了其在clbo晶體上的倍頻轉換效率與晶體長度,基波偏振分量比,基波階數及泵浦波強度之間的相互影響關系曲線。得出影響平頂高斯光束的最高轉換效率的因素是基波的階數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 通過對非線性負荷的理論分析表明,作為諧波源,非線性負荷所產生的諧波是吸收基波的一部分轉化而來,從而說明傳統(tǒng)的計量方式具有不合理性,提出相應的解決方法和對策,并建議一種新的電能計量方式供同行研究探討。