查询词典 noise-power-ratio

Combining vector median filter and mean value filter, vector median-mean filter, which can filter Gaussian noise and impulse noise and preserve fine details, is adopted.

为了提高图像的质量，采用了既能保持图像细节又能滤除脉冲和高斯噪声的中值滤波算法和均值滤波算法相结合的矢量中值均值滤波器。

Because heart-sound is a highly nonstationary signal, this paper presents the application of adaptive filter method to the elimination of noise, and at the same time, employs the datum of heart-sound plot as the reference noise.

针对心音信号的非平稳性，提出了以自适应滤波方法来消除干扰，并提出了以心音间隙期的样值作为参考噪声的分析方法。

In the measure amplification circuit, direct-current or low frequency signal come from a common sensor , conveying in only rhyme fashion way after amplification, In typical situation, serviceable signal maximum amplitude probable only have a certain number or amount millivolt, but common mode noise suppression may be up to several volt, as a result it is significant to the factor of the amplification input drift and noise etc for total precision, the amplification in itself common mode restraints features is also equally binding problem.

在测量用的放大电路中，一般传感器送来的直流或低频信号，经放大后用单端方式传输，在典型情况下，有用信号的最大幅度可能仅有若干毫伏，而共模噪音可能高到几伏，故放大器输入漂移和噪声等因素对于总的精度至关重要，放大器本身的共模抑制特性也是同等重要的问题。

Noise-proof: Because having a minimum density and internal porous, wall materials have strong sound absorption features. Noise-proof effect that can achieve 40 dB or more is better than concrete and other building materials. Walls make you have a quiet and comfortable living space in the complex world.

隔音：墙体原料自身密度小，且内部有微孔，具有很强的吸音功能，其隔音效果优于混凝土等建筑材料，可达到40分贝以上，在繁杂喧闹的世界中，墙体让您拥有一个安静舒适的生活空间。

By comparison with the results of ideal Henon sequence mixed with noise,the improved Farmer algorithm is able to increase the precision of noise attenuation and reduce the absolute error between itself and ideal Henon sequ.

通过对混有噪声的Henon序列进行仿真实验，仿真结果显示，改进后的Farm er算法能够提高噪声衰减的精度，降低与理想Henon序列的绝对误差

A model of an additive mixture of Gaussian and non-Gaussian impulsive noise is adopted, and the asymptotical solution of the closed-form expression for the average symbol error rate of orthogonal space-time block coding over Rayleigh flat fading channel is derived by means of the Moment Generating Function with the approximate equivalent Multiple-Input Single-Output model of mixture noise.

采用脉冲和高斯加性混合噪声模型，利用矩母函数分析方法，通过建立多发单收近似等效模型，推导出Rayleigh衰落信道下MISO空时分组码误符号率闭式表达式的渐近解。

Disturbing force and moment of shipping produced by random wave are the steady stochastic process, it is a kind of colored noise, but traditional Kalman filter demands that disturb of system is the white noise.

由于随机海浪对船舶的扰动力和扰动力矩是平稳随机过程，它是一种有色噪声，而经典卡尔曼滤波要求系统的干扰是白噪声。

Based on experiment data of flank array vibration noise, we researched the adaptive noise cancellation with monophonic and broad band signal by LMS algorithm and NLS algorithm.

研究了滤波器权长、算法收敛步长、信号和噪声频带范围对噪声抵消的影响，在此基础上选用合适的权长和步长对舷侧阵振动噪声进行了抵消。

Furthermore, the point scattering model is given to form basic scattering structure of the distributed target, and the multiplicative noise model is used to describe statistical characteristics of the distributed target simulation, and illustrate that the spaceborne SAR raw signal is a process of the multiplicative noise.

经过进一步分析研究确定了采用点散射模型来形成目标仿真的基本散射结构，同时应用乘性噪声模型来描述分布目标的统计特性，指出星载合成孔径雷达的目标回波是一个乘性噪声过程。

Finally, simulation results also verify the effectiveness of this method in presence of both additive noise and multiplicative noise.

模拟实验也证实了该算法在乘性和加性噪声并存情形依然有效。

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％。