平方

After introducing the primary approximation approaches for curve and surface offset, we give an optimal approximation approach for offsetting curve based on shifting control points, which relies on approximating the normal by Legendre polynomial approximation.

在全面介绍了等距曲线曲面逼近的主要方法以后，作者首先利用Legendre多项式得到基曲线法矢曲线的最佳平方逼近，由此给出了基于控制顶点偏移的等距曲线最优逼近的算法，它在算法效果和效率上都远优于其他同类算法。

Optical signal that the receiver receives , shaking the light wave produced with the receiver , on terms that meet the phase place and match and the amplitude is matched, mix it frequently , output the square of intermediate frequency signal electric current in direct radio of sum of the intensity of optical signal produced with optical signal , and receiver .

接收机接收到的光信号、与接收机内部振荡所产生的光波，在满足相位匹配和振幅匹配的条件下，进行混频，输出与光信号、和接收机产生之光信号强度之和的平方成正比的中频信号电流。

A total of 9,000 square feet of Jerusalem Gray limestone was used for the project.

还有9000平方英寸地耶路撒冷灰石灰石用在这个项目上。

Which is compared to an adjustable threshold of the current limit set point.

通过一个'或'电路选择三个电流平方的最大值和电流限定的设定值做比较。

Is compared to an adjustable threshold of the current limit set point.

通过一个'或'电路选择三个电流平方的最大值和电流限定的设定值做比较。

Singular value decomposition and Least Squares QR factorization are two basic methods for a linear equation group in seismic tomography.

奇异值分解法和最小平方QR分解法是求解反演成像中线性方程组的两种基本解法。

Many financial time series have a number of characteristics in common. Firstly, the logarithmic return series usually show no or little autocorrelation, whereas the squared values or absolute values of the series have high autocorrelation.

首先，收益序列没有明显的自相关性，但其平方或绝对值却高度自相关，序列的波动呈聚集性。

Strong, double-sided, twill-pattern cotton wipers are woven from the finest quality 100% long-staple cotton fiber in a cross section of 118 x 60 threads per square inch.

强韧双面斜织的全棉擦拭布，由100%最优质长纤维棉编织而成，每平方英吋有118x60高密度斜织线。

The body should only be rotated on a horizontal,longitudinal axis.

身体只能在水平方向上，围绕身体纵轴转动。

In the past, the high frequency resonance technique is usually applied in the envelope detection for a vibration signal with amplitude modulation. When applying the Hilbert transform in the high frequency resonance technique for the envelope detection of vibration signals, the computing burden is very high. On the other hand, when applying the linear least squares analysis method, the computing burden is lower. When applying the envelope detection in the lowest vibration mode, an accelerometer with the low-pass filtering cutoff frequency at 4kHz should be choose.

在过去的研究方法中，振动讯号之振幅调变通常以高频解调分析法应用於包络讯号侦测，而高频解调方法应用希尔伯特转换的包络分析，所需要的计算量是非常的高，若以线性最小平方分析法应用於高频解调分析法中，则所需要的计算量较小，如果以最低模态来估测包络讯号时，可以适当的选取加速规来代替低通滤波器，而加速规的截止频带必须在4kHz左右。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。