分析曲线

Improve the accuracy of the initial rotor position estimator by using the Fourier series expansion.

在永磁同步的马达启动方面，则透过送出不同向量空间角度的定子电压向量脉冲所量测到的d轴定子电流的大小来估测转子的初始位置，并利用d轴定子电流在空间向量角度以2π为周期的特性，应用傅立叶级数分析做曲线拟合的方式提高转子位置估测解析度，以提高转矩/电流比节省不必要的功率浪费。

With a testing system,guided wave testing was carried out on the rock bolts which was free and embedded in the soil to inspect the length of rock bolts.

分析了自由钢杆与置于土壤中钢杆的频散曲线，并利用所建立的试验系统，采用导波技术，对上述两种锚杆的长度进行了检测。

Magnetic properties dependence with multi-peak curve on frequency in W. Q sample is discussed.

本文对磁性的频散特性的多峰形曲线进行了分析讨论。

In this paper, the method of quantitative analysis is adpoted, and the index of information distortion degree is proposed. The information distortion problems of agricultural supply chain are described by the analysis of frequency response curve.

本文采用定量分析的方法，提出信息失真度的指标，通过对频率响应曲线的分析来描述农产品供应链中的信息失真问题。

Based on this theory,and combined with Fourier transform frequency spectrum analysis and curve fitting ,the formula and arithmetic of equivalent mainfrequency for the frequency conversion measurement are derived.

本文正是基于这种变频法的思想，结合傅立叶变换频谱分析法和曲线拟合方法推导了介质损耗参数的工频等效计算公式和算法。

A U like shape on the curve of fundamental mode waist in the active medium versus pump power, at different cavity lengths of the laser diode end pumped Nd:YVO 4 solid state lasers with a flat flat resonator structure, is analyzed by means of the transform circle approach.

运用谐振腔变换圆理论，详细分析了激光二极管抽运的Nd ：YVO4 平行平面腔固体激光器振荡光在晶体内的基模光斑半径随抽运功率变化的U形曲线。

The fundamental theory of surface reconstruction is further discussed which leads to the finding that there are some disadvantages in Bezier and NURBS. So both Bezier and NURBS are chosen as the fundamental methods to achieve surface reconstruction.

对曲面重建基本原理进行深入分析，针对Bézier方法和NURBS方法的各自特点，在系统中选择Bézier和NURBS两种方法作为系统软件曲线曲面重构的基本方法，并实现曲面重构。

This paper analysis the elliptic curves operation rules,presents a high speed serial-parallel elliptic curve multiplier for the Galois field GF(2^N) which based on optimal normal basis, compares the ECC chip speed and hardware resource consuming induced by the different Field partition.

本文分析了GF(2^N)域上的椭圆曲线的运算法则，提出了一种串－并行结构的基于优化正规基的高速有限域运算单元，比较了域划分D对芯片实现速度和硬件资源占用的影响，完成了域GF(2^N)上基于ONB的ECC芯片快速实现。

Due to the sensitivity of Guass wavelet to the flex points of the signal and the multi-scale analysis of the wavelet resolution,the abruptly changing points at the interface of stratigraphic sequence shown from the logging curve can be revealed clearly by Gauss wavelet transformation of logging data .

在层序地层单元的分界面上，测井曲线表现为突变，而高斯小波对信号突变点具有敏感性和多尺度分析特性，因此测井数据的高斯小波变换能够表征这种突变。

Gaussian curve fitting and removal of the trend, and for most non-stationary sequence analysis.

详细说明：曲线的高斯拟合，去除趋势性，对于一般非平稳序列的分析。

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％。