noise standard

Existing question for the environment noise standard and its revising

浅谈环境噪声标准存在的问题与修订要点

Discussion of noise standard for movable power station vehicle

对电源车辆噪声标准的探讨

Dividing Environmental Noise Standard Region in Town Area of GanNan County

甘南县城镇区域环境噪声标准区域划分

Approach on Noise Standard in Tourist Area

风景旅游区环境噪声标准问题探讨

It was seen that these signals accord with the white noise standard .

同时对过滤得到的噪声信号进行分析，发现这些噪声信号符合白噪声的标准。

Method and procedure of district division for environmental noise standard being suitable to city at county level

GIS在城市区域环境噪声标准适用区划分中的应用县级城市（镇）环境噪声标准适用区域划分方法和程序探讨

Primary Noise Standard for C band

C波段热噪声标准

Environmental noise standard of urban area was calculated by weighted average method according to the grid area ( or number ) and its standard .

运用加权平均法探讨城市的区域环境噪声评价值，提出将各功能区标准按面积（网格数）进行加权所得的平均值作为评价标准。

Pointing out the existing question of the environment noise standard , the paper discusses the necessities and main points for revising .

在提出目前国家有关噪声标准中存在一些问题的同时，指出噪声标准修订工作的紧迫性及修订要点。

Real gray distance of pixels neighbor can be calculated by the observant gray value and the noise standard deviation .

通过已知的观测灰度值和噪声标准差，该方法可以计算出像素邻域间的真实灰度距离。

Based on the two dependencies , the paper proposes a new threshold function and researches the relation between the threshold and image noise standard deviation .

根据这两种小波系数关系，提出了一种阈值函数，并研究了阈值和图像噪声的关系。

This paper reports on the 673.7K thermal noise standard for 7 / 3.04 mm coaxial system developed recently by the authors .

本文叙述作者等研制的673.7K±1.5K、7/3.04mm同轴高温热噪声标准。

A 673.7K Coaxial Thermal Noise Standard

同轴高温热噪声标准

This speciality standard will give a go-ahead for using as the reference of the cold and room-temperature microwave noise standard source below3dB ultra-low-noise received system .

本标准批准后即作为噪声系数3分贝以下低噪声精密测试时的“冷热源”专业技术标准。

The analytical results for g factor map , noise standard deviation and artifact power of a series of 3D images show that the PF_GRAPPA method has obvious advantages over 2D GRAPPA .

对三维图像的g因子图、噪声标准差和伪影强度等定量分析的结果表明，PFGRAPPA算法优势明显，可适用于厚体和薄体成像。

Extend the expressions of the minimum mean squared error bounds of the references , and give the relations of the minimum mean squared error bounds of pose angle and noise standard deviation .

对文献中已给的目标方位角的最小均方误差表达式进行了推导，并且给出了方位角的最小均方误差和噪声偏差之间的关系。

The H-Curve criterion does not need know the noise standard deviation firstly , and it can dispose many kinds of noise practically and produce a better effect in vision over smooth image brought up by many methods presently .

此准则不需要提前知道噪声标准偏差，在实际应用中适用于不同类型的噪声，并且和目前多数方法去噪后的图像过于平滑相比，它还能产生较好的视觉效果。

When the noise standard for city regional environment and the noise standard for railway environment being revised , the type of railway and its noise character should be sufficiently noticed , so to improve the scientific character and feasibility of the standard .

认为环境影响评价的噪声适用标准应以排放标准为主，并提出修订城市区域环境噪声标准和铁路环境噪声标准时，应充分注意铁路的类型及其噪声的特点，提高标准的科学性和可行性。

In addition , our country lacks internal acoustic environment in residential area detailed noise standard , in the evaluation of residential area of internal acoustic environment , more general , not specific , also not true , objectively reflect the quality of acoustic environment in residential district .

另外，我国缺少针对居住区内部声环境的详细噪声标准，在评价居住区内部声环境时，较为笼统，不具体，也不能真实、客观地反映居住区声环境的质量。

Discussion on determining and testing method of environmental noise in standard district

环境噪声达标区验收抽测方法的探讨

Processing Method of Noise in Standard Document Image

规则文档图像噪声处理方法

To strictly control the works according to the noise control standard for nighttime and daytime construction ;

严格按照夜间、白天施工噪音控制标准控制作业；

For images with Gaussian noise whose standard deviation is 0 ~ 60 , the position error is 0.052 ~ 0.086 pixels .

而对于被标准差为0～60的高斯噪声污染的图像，位置误差为0.052～0.086像素。

To avoid sensor noise , standard deviation of measurement data is calculated to detect start point , end point and turn point of one stroke .

为了减少传感器噪声的影响，使用标准偏差来进行笔画的起始点、终止点和转折点等特征点的判断。

A Calculation Method for the Output Noise Temperature of Standard Thermal Noise Source

一种热噪声标准源等效输出噪声温度的计算方法

Levy Situation and Countermeasure on Industrial Noise Exceeding Environment Standard in Countryside

乡镇工业企业超标环境噪声排污费的征收与对策

Noise Suppression of Standard Image of Material Hydrophilicity

材料亲水性标准图象去噪研究

Objection to Levy Standard on Noise Exceeding Environment Standard

对《超标环境噪声排污费征收标准》的异议

The measurement precision mainly depends on two aspect , one is the phase noise of frequency standard , the other is the linearity of phase detector in the range from 0 to 360 .

此方法测量精度的高低，主要取决于两个方面，即频率标准本身相位噪声的情况和在0～360°范围内鉴相的线性度。

With respect to the minimization of the overall average variance of interference noise under the standard Gaussian approximation condition , the optimal partial auto-correlation function of the spreading sequences for A-CDMA systems is derived .

在标准高斯近似条件下，以最小化系统平均多址干扰方差为准则，推导出了A-CDMA系统最佳扩频序列的部分自相关函数形式；