查询词典 noise-power-ratio

But in practical conditions, the assumption of white noise is not always true. When the noise model is not white, the traditional high resolution methods will be deteriorative and even invalid.

然而在实际环境中，白噪声的假设并不总是成立，当实际噪声不满足白噪声模型时，传统的高分辨方法的性能将会引起严重的恶化甚至失效。

Blood speckle noise in the IVUS image would affect the validity of edge detection badly. A temporal/spatial filtering method was used to preprocess the IVUS image to restrain the noise. Then a method to automatically detect the intima and ectoblastic edge of IVUS image was presented. This method is based on the active contour model and the contrast properties of IVUS image, which makes use of the Hopfield NN and simulated annealing algorithm.

为解决血管内超声图像中严重的血液斑点噪声影响边缘提取方法的有效性问题，采用一种时/空滤波方法对IVUS图像进行降噪预处理，基于活动轮廓模型和IVUS图像的边缘对比度特征量，利用Hopfield神经网络并结合模拟退火算法自动提取IVUS图像的冠脉血管壁内、外膜边缘。

The process of feature extraction is to transform the eradiate noise signal to different feature space and extract the feature vectors that reflect the category of the input sample. The extracted features are the input modes to the classifier. Through the inspecting, the author selected three methods of eradiate noise's feature extraction.

本文作者经过考察，采用了三种前期研究中较为有效的水下目标特征提取方法——基于功率谱估计的线谱特征提取方法、基于小波分析的不同频段内能量特征提取方法和基于水声信号分维特性的特征提取方法。

ANC is an effective way to attenuate noise that is very difficult and expensive to control using other passive means. In order to reduce the noise around the exhauster and incubator, this project studied an ANC system using embedded signal processing technique.

为了降低厨房抽油烟机的运转噪音与让保温箱内早产儿有宁静的环境，本计画研究应用嵌入式信号处理技术进行主动式噪音防治以抑制噪音。

According to the dependence of photorefractive effects (such as facular size effect, beam climbing effect, and competition rules between noise grating and signal grating) on various physical factors, we get an effective method controlling the intensity of the noise.

利用光折变效应中的光斑尺寸效应、光爬行效应以及晶体中信号栅与噪音栅之间的竞争规律对各种物理因素的依赖关系，摸索出一套控制噪音强弱的有效方法。

Because the proposed model has the property of multi-scale, the excellent anti-noise in the interior of the region, and the noise weakening faintish edge, the corresponding algorithm has good performance in image edge detection.

该模型具有多尺度、区域内部抗噪能力与尺度有关、噪声弱化弱边缘以及边缘具有隶属度、图像的边缘检测结果与尺度有关等特点，反映了边缘与纹理依尺度的关系。

There was no sound save the noise, the faint shuffling noise from Stacks Gate colliery, that never ceased working: and there were hardly any lights, save the brilliant electric rows at the works. The world lay darkly and fumily sleeping.

除了永不这地工的，史德门矿场的隐约而断续的声音外，没有什么其他的息；除了工厂里一排一排的闪炼的电灯光外，差不多没有什么其他的光，世界在烟雾中阴森地沉睡着，那是两点半了，但是这世界虽然是在沉睡中，还是不安，残的绘火车声和大路上经过的大货车的声音搅扰着，给高炉的玫瑰色的光照耀着。

The experiment results show that this method is good for filtering noise mixed by Gaus e and pepper noise in image.

实验结果表明，该算法对含高斯和椒盐混合噪声图像滤波效果明显。

This paper describes a new algorithm of image enhancement of impulse noise based on PCNN time matrix and rough sets indiscernibility relation. For noisy gray images, the results of computer simulations show that the image noise can be reduced efficiently and the image becomes clear and the target details of the image can be enhanced better by using this algorithm. In addition, the effects of this algorithm are better than usual image enhancement algorithm.

基于粗集理论中的不可分辨关系的等价概念及PCNN赋时矩阵，提出了一种含有脉冲噪声的图像增强算法，计算机仿真结果表明，对被噪声污染的灰度图像，用基于PCNN与粗集理论相结合的图像增强算法处理后，图像噪声得到有效抑制，画面更清晰，图像中目标的细节也得到了很好的增强，其结果优于常规方法。

Actually, modern noise is informidable, for just like people's yearn for quietness in deep heart, noise originates from the inside contradiction of humanity, which is also why we can see such a double spiritual direction coexisting in the artist ZHANG Donghong's works.

这就是我们为什么能够在同一个艺术家张东红的作品中看到这种双重精神向度共存的原因。

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％。