查询词典 fundamental curve

This paper applies Fourier series to detach the fundamental waves phase, adopts the curve fitting to the frequency of the maximum spectrum amplitude, utilizes the sine wave parameters of law to the phase angle of this frequency, calculates δvalue and tanδvalue.

本文以傅立叶级数分离基波相位的方法为依据，通过曲线拟合求频谱幅值最大值处的频率，利用正弦波参数法求该频率处的相位角，从而计算出δ值和tanδ值。

Through the spot measurement of the pump and downstream pipeline noise,and analyzing the spectrum analysis curve of sound pressure level and sound intensity level,this paper offers basis for the fundamental reason study of high vibration and noise,and puts forward t.

通过对泵及下游管线噪声进行现场测量，以及对各测点声压级谱分析曲线和声强级谱分析曲线的分析，为研究其振动和噪声高的根本原因、提出合适的改造方案提供依据。

This paper introduces the fundamental principle of smoothness and prediction in use of grey theory in passive angle tracking, and constitutes the module of smoothness and prediction based on the grey algebraical curve model.

介绍了利用灰色理论在无源角度跟踪中进行平滑预测的基本原理，建立了基于灰色代数曲线模型的平滑预测模块，并通过计算机仿真说明灰色代数曲线模型较灰色微分方程等其它几种模型更适合于无源角度跟踪中的平滑预测，并就几种模型的应用范围作了比较。

Strength and mobility in the gluts is fundamental to reducing the "S" curve in your spine.

臀部肌肉的力量和灵活性对减少脊柱的&S&弯曲有重要作用。

0001 EU patent verification. Patented technology curve flooring pure physical methods, a fundamental solution to the solid wood floor when the drawbacks of tidal arch camber deformation, has changed the traditional style wooden flooring shortcomings, with an elegant new shape, beautiful clean lines, natural features of environmental protection and to maintain the wood's natural color, is now home, office space, sports facilities, hotels, commercial buildings ideal for flooring.

曲线地板专利技术采用纯物理方法，从根本上解决了实木地板遇潮起拱变形的弊端，改变了传统地板造型呆板的缺点，具有造型新颖雅致，线条优美清新，天然环保等特点，并保持了木材的天然本色，是现在居家、办公场所、体育场馆、宾馆、商厦的理想地板。

Intake efficiency is the most fundamental and important parameter for engine performance, yet the open and close timing as well as the lift depth of the intake valves are determined by the contour curve of the camshaft, that means the valve timing and lift depth are constant and fixed.

进气效率，是引擎最基本也是最重要的性能参数之一。而进汽门的开启时间与关闭时间以及扬程的大小是经由凸轮轴的轮廓曲线所决定，亦表示汽门正时与扬程是固定不变的。

The theories proposed by Wilson (1994) were adopted to describe the fundamental behaviors of temperature and variation of suction of soil. The Darcy's law and Pick's law described the flows and evaporation of water respectively. Some proposed assumptions including the characteristic curve of volumetric water content and hydraulic conductivity were only related to the suction of unsaturated soil. The coefficient of latent heat for water was a linear function of temperature; and the heat conductivity was calculated according to the equation proposed by De Vries.

对于土体的温度和吸力变化特征，采用Wilson提出的理论加以描述，在此理论中，分别利用Darcy和Fick定律描述水和蒸汽的流动规律，土水特征曲线和水力传导系数假定仅仅相关于非饱和土吸力，水的潜热系数是温度的线性函数，温度传导系数采用De Vries建议方程加以计算。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。