English translation for "四次方"

biquadrate
the power of four, the fourth power

Example Sentences:

	1.	We can raise any number to the fourth power by squaring it twice . 我们能把任一数平方两次就得到它的四次方。
	2.	The axial forces are related to oil supply pressure , and also to the square of rotary speed and the fourth power of effective diameter of circular circle 轴向力除了与供油压力有关外，主要是与泵轮转速的二次方和循环圆有效直径的四次方有关。
	3.	The potential applications of amr include both civil and military communication , especially non - cooperative communications and communication confrontation , such as identifying signals , supervising signals , distinguishing interference , electronic confrontation , analyzing military threat , etc . on the basis of our analysis to the existing research on feature abstraction , the related feature abstraction methods are optimized in this paper , resulting several effective methods such as the feature abstraction based on transformation domain , stepped voltage level analysis , normalized carrier - free spectral energy analysis , squared signal and fourth powered signal analysis , etc . both the decision theory based on recognition algorithms and the artificial neural network ( ann ) based on recognition algorithms is analyzed , and the former is selected as it is more appropriate for this research 调制类型的自动识别广泛应用于民用通信与军用通信，尤其是对于非合作性通信、通信对抗，比如：信号确认、信号监控、干扰辨识、电子对抗、软件无线电、电子救援、通信对抗、军事威胁分析等。本论文在分析现有研究的基础上，借鉴了已有的特征提取方法，对相关调制类型特征提取方法进行了优化，使用了一些有效的方法，如基于变换域特征提取方法、梯层电平分析方法、剔除载波后的归一化频域能量分析方法、信号平方后的频谱分析方法、信号四次方后的频谱分析方法等。通过对基于决策理论和基于人工神经网络两种识别算法进行分析，本论文选择了较适合的基于决策理论的识别算法。
	4.	As far back as the 19th century , the english scientist lord rayleigh studied how light bounces off molecules air molecules included and pointed out that the amount of such scattering , i . e . change from the original direction of light , varies inversely with the wavelength in technical terms , inversely proportional to the 4th power of the wavelength 早于19世纪，英国科学家雷利勋爵研究光线遇上分子包括空气分子时会出现改变方向的散射现象，并指出其散射程度与波长成反比。严格来说，应是和波长四次方成反比。
	5.	As far back as the 19th century , the english scientist lord rayleigh studied how light bounces off molecules ( air molecules included ) and pointed out that the amount of such scattering , i . e . change from the original direction of light , varies inversely with the wavelength ( in technical terms , inversely proportional to the 4th power of the wavelength ) 早于19世纪，英国科学家雷利勋爵研究光线遇上分子（包括空气分子）时会出现改变方向的散射现象，并指出其散射程度与波长成反比。 （严格来说，应是和波长四次方成反比） 。
	6.	Based on the given linear holstein model , and using the variational method we obtained the ground state properties of the electron - phonon interaction system with cubic and quartic lattice ( phonon ) terms . we obtained the relations between the ground state energy and the phonon squeezing effect and polaron squeezing effect as well as the variation of the polaron bandwidth 在线性holstein模型的基础上，采用变分法得出了含晶格(声子)三次方和四次方势下系统基态特性，得到了基态能量与声子压缩效应和极化子压缩效应的关系，并求得了极化子能带宽度的变化规律。
	7.	Secondly , the paper researches blind estimation of signals parameters , including the carrier frequency , signal to noise ratio and symbol rate of digital modulations . thirdly , with the combination of parameters from early studies on the decision theory , a set of robust feature parameters are extracted from signal power spectrum and the power spectrum of the second and fourth power of signal . based on these parameters , the proposed scheme is able to recognize 12 types of common used modulations , namely ask 、 2fsk 、 msk 、 4fsk 、 psk 、 qpsk 、 / 4qpsk 、 8psk 、 am 、 dsb 、 ssb 、 fm 接着,对信号功率谱、平方谱及四次方谱进行研究,针对通信中常用的调制方式,结合前人提出的基于决策理论中的特征参数,设计了一组对信噪比和信号调制参数不敏感的分类特征参数,利用上述参数完成了一种基于信号频域的识别方法,可以对ask 、 2fsk 、 msk 、 4fsk 、 psk 、 qpsk 、 / 4qpsk 、 8psk 、 am 、 dsb 、 ssb和fm这12种常用调制方式进行识别。
	8.	Abstract : considering the second nearest - neighbor interaction and cubic , quartic anharmonic interactions simultaneously , we employ the multiple scales method combined with a quasidiscreteness approximation to calculate the lattice vibration . it is shown that the kind of nonlinear chain exhibits envelope soliton , envelope kink and envelope antikink soliton . these results can also be used to explain the experimental phenomena that the kink amplitude of the self - localized structure is determined only by the intrinsic properties of its lattices 文摘:同时考虑次近邻谐振相互作用和三次方、四次方非谐相互作用，利用多重尺度结合准离散近似方法去计算晶格振动行为，发现一维非线性点阵中存在包络孤子及正扭结型包络孤子、反扭结型包络孤子，解释了自局域结构的幅度只取决于点阵中的固有参数的实验现象

Similar Words：

"四次打艇的爬泳" English translation, "四次倒反轴" English translation, "四次的" English translation, "四次对称" English translation, "四次对称轴" English translation, "四次方程" English translation, "四次方程式" English translation, "四次方根" English translation, "四次婚礼和一次葬礼" English translation, "四次婚姻" English translation