互相关系数

We performed a field experiment by the end of 2004, and based on the data of this experiment, we studied the amplitude degression and corresponding seismic attenuation factor of both single event waveform and cross-correlation function. It is found that, same as single event waveform, cross-correlation function could be used to assess the seismic attenuation.

依据野外现场实验的数据，我们分别以单次和多次激发为源，讨论了事件波形和互相关函数波形的振幅变化及相应的介质品质因子，结果发现，与事件波形一样，互相关函数波形也可以用于计算介质的衰减系数。

We performed a field experiment by the end of 2004, and based on the data of this experiment, we studied the amplitude degression and corresponding seismic attenuation factor of both single event waveform and crosscorrelation function. It is found that, same as single event waveform, crosscorrelation function could be used to assess the seismic attenuation.

依据野外现场实验的数据，我们分别以单次和多次激发为源，讨论了事件波形和互相关函数波形的振幅变化及相应的介质品质因子，结果发现，与事件波形一样，互相关函数波形也可以用于计算介质的衰减系数。

Based on the existed approaches of hydrometeor classification and the requirement of application in China,we construct a algorithm to classify the precipitation particles with the polarimetric radar observations,and make a comparison of polarimetric radar variables sensitivity Z_DR,K_DPand ρ_HV(0) in this model.

在综合分析国内外降水粒子相态识别方法的基础上，结合我国双线偏振雷达的应用需求，建立了一套利用双线偏振雷达探测资料识别降水粒子类型的识别模式，并根据美国KOUN雷达观测资料对该模式进行了分析验证，同时检验了模式中的几个偏振参数：差分反射率因子ZDR、差传播相移KDP、水平偏振和垂直偏振回波功率零滞后互相关系数ρHV(0)对不同降水粒子的识别效果。

Because the weights are determined by the correlation of code sequence and estimation error of channels, which can be nearly determined by system load factor, we determine the sub-optimum weights by system load factor through simulations, and substitute the hard-decision symbol function by soft-decision hyperbolic tangent function to decrease the risk of error decision.

由于加权因子取决于前级符号估计的可靠性。也就是取决于扩频码互相关系数与信道估计精度，在随机扩频系统中，估计精度可近似由系统负荷决定，因此可根据系统负荷决定加权因子，以很小的性能降低代价换取计算量的极大降低。同时，为进一步降低误判风险，使用带有斜率控制因子的双曲正切函数代替常规的符号函数。

The NCCFPDA (Normalized Cross-Correlation Function Pitch Detection Algorithm) is studied and improved in this paper.

研究和改进了一种基于归一化互相关系数的基音检测方法。

The normalized cross-correlation coefficients, short time normalized energy and adaptive threshold to classify surd/sonant and to select pitch candidates with the high-resolution and efficient implementation are used in NCCFPDA.

NCCFPDA算法利用归一化互相关系数、短时归一化能量和自适应门限来区分清／浊音和选取基音周期，计算量小，精度高。

The spread-spectrum code of CDMA isnt orthogonal strictly in a general way because the connection of the stochastic multi-user. The nonzero cross-correlation coefficient will cause multi-access interference.

由于多个用户的随机接入，所使用的扩频码一般非严格正交，非零互相关系数的存在会引起用户间的相互干扰，称为多址干扰。

Meanwhile, with the measurement result of the IACC（Interaural Cross-correlation Coefficient）, further discussion and analysis are also conducted.

运用环绕声录音和重放原理，结合对重放声双耳互相关系数测量的数据，对结论进行了分析和讨论。

The paper discusses the principle of zero-phase wavelet extracted from Ground Penetrating Radar record at the base of coefficient of reflection being white noise and used to remove the random noise in the GPR signal with cross correlation filter.

该文简述了在反射系数为白噪声条件下探地雷达记录道中零相位子波的提取，并用提取的子波对探地雷达信号进行互相关滤波的方法原理及编写的相应的程序。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。