查询词典 noise-power-ratio

After precision validated, the system is used to test and analyze local noise, interior noise, pass-by noise and engine vibration and noise.

系统通过了精度验证，并在实际应用中测量和分析了汽车定置噪声、汽车匀速行驶车内噪声、汽车加速行驶车外噪声和发动机台架振动噪声，结果表明系统测量分析准确，能够准确定位汽车和发动机的声源和振源，达到了预期的功能和性能需求。

Through the analysis of empiric formula for calculating machine noise,the paper suggests the main methods of reducing noise, introduces the measures of reducing the noise of new-type universal turret milling machine (XQD6225), and puts forward the viewpoint of prevising the value of noise at the stage of designing machine.

本文通过对计算机床噪声经验公式的分析，提出了降低噪声的主要途径，并介绍了XQD6225新型万能回转头铣床降低噪声的措施，同时还提出了在机床设计阶段便可预测噪声值的见解。

The improved model possesses band-pass filer characteristic, diffuses processing stability and satisfies the max-min principle. The simulation results show that the median filter is only proper for outlies noise and removes the thin line and corners of image. The linear filter extends or blurs the boundary of image. The anisotropic diffusion removes random noise effectively, but it brings about illusive edge and back diffusion for outlies noise. The improved model that possesses both median filter characteristics and anisotropic diffusion capability is proper for various mixed noise and can sufficiently protect the detailed characteristic such as corner, thin line and edge.

研究结果表明：中值滤波作为一种经典的非线性滤波方法仅适合于&飞点&噪声的滤波并引起图像的角点、线条损失，线性滤波扩大或使图像边界范围模糊；传统的各向异性扩散能对随机噪声有效地压制，但对&飞点&噪声会产生虚假的边缘甚至反扩散，而改进模型既具有中值滤波的特性又具有传统各向异性扩散的性能，适合于平滑不同强度与形状的混合噪声，并对角点、线条、边缘等细节信息提供足够保护。

The products of DPCA have adopted a lot of measures to reduce the wind noise, engine noise, ground noise and car parts interfering and hitting noise in the phase of developing.

神龙公司的产品在开发阶段采用了大量措施来降低风噪声，发动机噪声，地面噪声以及车上零件干涉和碰击噪声。

Firstly, the steady state statistical properties of the logistic growth model with colored noise are analyzed when the unified colored noise approximation is applied. It is found that the noise correlation time and the coupling between noise terms can induce first-order-like phase transition and re-entrance phase transition phenomenon.

首先，用统一色噪声近似理论分析了含有色噪声的Logistic 增长模型的定态分布函数，发现噪声相关时间τ和噪声间的耦合λ均能诱导一级相变类比和重复相变现象。

Finally, experiments and analyses in valve gear vibration and noise are conducted by means of the advanced measuring and processing instruments. Especially, the noise caused by valve setting is separated and analysed from the total noise, such work has never been done before. The conclusions are significant for reducing vibration and noise of valve gear.

本文使用目前国际上先进的测试、分析仪器对配气机构的振动、噪声进行了实验和分析，特别是在噪声分析上设法将气门的落座噪声分离出来，专门地进行了分析，这在配气机构的噪声分析上还是第一次，得到了一些有意义的结论，为配气机构的减振、降噪提供了依据。

The noise improvement need synthesizes the establishment of index sign, is the influence factor which brings orbit noise to meeting to make a study first, again collect an actual measurement data application to return to seven modes of returning the orbit noise of the way establishment, part 2 then makes use of the way of expert's questionnaire, applying the technique of Delphi-AHP, begging to take seven powers of noise factors

经由数据的汇整分析，由各路段所呈现噪音改善需求综合指标，可以判断噪音改善的需求强度，尤其是波状磨耗的改善，依此噪音改善的需求强度便可排定磨轨的顺序及时机。

In the chapter two、 three and four of this paper, aiming at the salt-and-pepper noise , gaussian noise and hybrid noise which is make up of the both mentioned, applying some kind of non-linear theories in the aspect of noise removing, the paper brings forward some new filter algorithms at the basic of the predecessors work.

本文的二、三、四三章分别从椒盐噪声、高斯噪声以及二者组成的混合噪声等三种噪声类型入手，将多种非线性理论应用到噪声的滤除方面，在前人研究的基础上，提出了一些新的非线性滤波算法。

In accordance with the pictures which are polluted by two different types of noises---salt-and-pepper noise and Gaussian white noise, the thesis analyzes the parameters in PCNN algorithm one by one in detail, and reaches some serviceable conclusions, pointing out there exist some differences in choosing parameters of the model when removing the salt-and-pepper noise and Gaussian white noise.

本文的工作取得了以下三方面的新进展：(1)在对二值图像进行去噪处理时，针对被两种不同类型的噪声——椒盐噪声和高斯白噪声污染的图像，对PCNN算法中的参数进行逐个地详尽地分析，得出了一些有用的结论，指出当算法具体应用于去除椒盐噪声和高斯白噪声时，参数的选择存在着区别。

Since the glint noise is a low-frequency noise and its bandwidth is usually lower than that of flight control system, therefore low pass noise filtering is not practical for guidance command and noise are not distinguishable.

闪烁杂讯属低频杂讯，通常比飞控制系统频宽还要低，无法与导引命区分，所以能只用低通波器将其除。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。