查询词典 harmonic

Linear, annual, and biyearly variations of GPS height have been analyzed with help of harmonic analysis method.

利用三角多项式拟合方法分析了所有测站高程变化的线性项、周年项、两年项和半年项。

The computing formulas for the harmonic parameters are given based on the features of Hanning Window and Blackman Window.

然后通过对常用窗函数的特性探讨，给出了基于海宁窗和布莱克曼窗下的幅值和频率估计公式。

A comparison is made between the performance of harmonic analysis method and that of Blackman window method through the simulated experiments, and in the condition of same order of filters, the stop-band attenuation of filters designed by this method is 5~7 dB more than that of filters designed with Blackman window in the range of different frequencies.

通过仿真实验，把其结果与用Blackman窗函数设计的滤波器的性能进行了比较，在滤波器阶数相同的条件下，在不同频率范围内，该方法比用Blackman窗设计的滤波器的阻带衰减大5~7dB以上，不仅过渡带宽依然变小，而且二者的通带波纹大小相差很小。

The nonlinear stability of three-dimensional disturbances for the Blasius boundary layers is studied. We adopted here the high accuracy method of using the expansions in orthogonal functions along the normal direction and the effective algebraic mapping to deal with the problem in the infinite region. The initial solutions of two-dimensional harmonic waves are given by Landau expansion, and the mean-flow-distortion is calculated by the approximation equation.

运用Landau展开给出了二维谐波的初始解、通过求解线性PSE而得到TS波和C型亚谐扰动的初始站值、以及近似地模拟初始站的均流变形值，以此为初始条件，并结合迭代-预估校正方法来实现非线性PSE的求解和推进，详细地研究了非平行边界层三维扰动C型失稳过程。

We have conducted measurements in heterodyne detection including superconductor mixers and semiconductor harmonic mixers, direct detection including InSb semiconductor bolometer and Golay Cell, and some materials which could be permeated by terahertz waves.

测得的频谱分辨率可达约1 GHz。我们已经测量的器件有：超导隧道结混频器和工作于常温的半导体肖特基谐波混频器，InSb半导体Bolometer和Golay Cell直接检测器，各种频率的THz信号源，和一些能透过THz的材料等。

Using spherical harmonic function expansion and finite element method,Boltzmann transport equation is solved numerically,the convergence of the method is approved.

讨论了谱有限元方法在中子测井数值模拟中的应用，用球谐函数谱展开和有限元耦合方法求解Boltzmann中子输运方程，得到了这种耦合方法的收敛性。

The bond and angle terms are usually modeled as harmonic oscillators in force fields that do not allow bond breaking.

在力场中为了不让键断裂，键项和键角项一般被模型化为 harmonic oscillators 。

When the harmonic approximation is breakdown,the Morse potential is taken as the free energy surface to study the anharmonic effects of solvent mode and vibrational mode.

在谐振子近似失效的情况下，我们考虑了势能面为Morse势时，溶剂化方向和分子内振动方向的非谐性对电子转移速率的影响。

Instantaneous reactive power theory, three-phase four-line system, three-phase rectifier bridge, reactive power and harmonic

瞬时无功功率理论；三相四线制系统；三相整流桥；无功和谐波

After the section of right side NXIIts in Budgerigar in the original sound wave\'s expanded time window, the higher amplitude pulse and the lower amplitude pulse exchanged alternately and also the higher amplitude is approximately as twice as the lower amplitude. The above outcomes show that NXIIts is most important in controlling the tone varieties and the numbers of the harmonic parts and the course of the vocal control maybe a process of alternative replacing.

NXlltS可能在控制其鸣声的音调变化以及影响其呜声的谐波数量上起到一定的作用，其控制区发声的过程很可能具有交替更换的特性。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。