查询词典 noise-power-ratio

The paper expands some important links of the communications system which include channel, noise, digital transmission of analog signal, channel encode and signal modulation.

本文在深刻理解通信系统理论的基础上利用MATLAB强大的仿真功能，设计了许多具体的通信系统仿真模型。

Based on design requirements of analog channel of DAQ system,according to actual problems to be solved in high-speed analog channel,such as parasitic parameter of circuit element,source noise and high frequent crosstalk on PCB,research has been carried out.

基于数据采集系统模拟通道的设计要求，针对高速模拟通道中元件的寄生参数、电源噪声和PCB板上的高频串扰等实际问题进行研究。

One of these constraining factors is self generated noise within the analog to digital converter.

这些制约因素之一是在模数转换器内自生的噪声。

It is therefore sensible to separate analog and digital circuitry to prevent digital noise from corrupting analog performance.

为了不影响模拟电路的性能，应该把模拟电路的电源和数字电路的电源隔离开。

The Analog-to-Digital Converter has a typical nonlinear feature and its output noise relies on the input signal.

模拟数字转化器具有典型的非线性特性，其输出噪声对输入信号存在着依赖关系。

The analogue components would cause signal distortion and noise.

模拟元件会造成信号失真和噪声。

Fully and clearly analytic expression of multiwavelet transformation is given .The experiment of speckle reduction to US image is implemented by choosing local error as threshold. Results show that multiwavelet transformation is useful for speckle reduction and there have little noise and reserve important image features such as boundary when compared to results obtained from existing the denoising methods alone.

在二维图像阵列的应用方面，通过采用局部方差作为阈值，对超声斑纹图像进行阈值化去噪处理的实验结果表明，多小波变换在有效抑制斑纹噪声的同时，相对于其他方法还能更好地保留原图像的边界等重要特征信息。

In active noise control applications, the existence of disturbance can significantly degrade performance of ANC systems.

中文摘要在实际的主动噪音控制系统应用中，干扰讯号的存在会破坏系统的性能。

Several active noise control algorithms often used in practice are introduced, the performances of the ANC algorithms are analyzed, and some...

最后对算法的选择提出了建议，并对ANC的未来发展进行了展望。

It provides steady lifting with low noise, and is equipped with lifting brackets, anti-fall supporting protection, stopping protection against wire fracture, limiting device for maximum load, control device for maximum lifting height and fixing device for the turning angle of the bracket arm.

升降平稳、噪音低，并设有举升托架、防跌落支承保险、钢索断裂制动保险；最大负荷限定装置和托臂回转角度锁定装置。

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％。