噪声标准

C波段热噪声标准

Primary Noise Standard for C band

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

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

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。

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 .

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。

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

结论根据研究结果和我国实际情况，噪声标准中接触限值（8h接触）定在85dB（A）为宜。

Conclusions According to results obtained and the realistic situation in China , it is appropriate to set the threshold limit of noise exposure at 85 dB ( A )( 8 hours exposure per day ) .

仿真试验表明，在GPS速度噪声标准差为0.1m/s、Doppler速度噪声标准差为0.5m/s的情况下，航向误差的辨识精度优于0.22'（2σ），收敛时间不超过120s。

The result of simulation showed that the identified accuracy of the heading error was less than 0.22 ' ( 2 σ) and the convergence time less than 120 s while the standard deviation of the GPS velocity was 0.1 m / s and the Doppler velocity 0.5 m / s.

甘南县城镇区域环境噪声标准区域划分

Dividing Environmental Noise Standard Region in Town Area of GanNan County

浅谈环境噪声标准存在的问题与修订要点

Existing question for the environment noise standard and its revising

4类噪声标准适用区最佳监测时间研究

Study on the best noise monitor time of typical four function area

固定污染源噪声标准与监测问题的探讨

Approach for noise emission standards of fixed sources and monitoring

对电源车辆噪声标准的探讨

Discussion of noise standard for movable power station vehicle

工业企业厂界噪声标准。

Standard of noise at boundary of industrial enterprises .

一种热噪声标准源等效输出噪声温度的计算方法

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

对白噪声标准差随时间变化的时变序列模型进行研究，给出便于工程应用的模型形式。

The time-varying series model whose white-noise standard deviation varies with time is researched .

挖泥船噪声标准刍议

An Opinion on the Noise Criteria of Dredgers

本研究为制订学校噪声标准和噪声防治提供了科学依据。

Our research has certain reference value in enacting standard and prevention of noise .

谈我国现行噪声标准中的问题

Discussion Current Motor Vehicle Noise standards of China

结论所调查小区的规划建设基本合理，总体可以满足环境噪声标准的要求。

Conclusion The construction planning of the areas surveyed accords with criteria for ambient noise .

风景旅游区环境噪声标准问题探讨

Approach on Noise Standard in Tourist Area

我国目前还没有道路交通噪声标准。

There is no traffic noise-criterion .

同轴高温热噪声标准

A 673.7K Coaxial Thermal Noise Standard

建议由当地政府依据当地的实际情况划分确切的测量时间段和适用的区域环境噪声标准类别。

This article suggests the local government divide definite measuring time and practical standards for noise measurement .

该计算式已被用于确定热噪声标准源的资用噪声温度。

This formula has been applied to determine the available noise temperature of the thermal noise standard source .

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。

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

在居住小区建设中，过去对声环境的控制重视程度不够，当发现居住区的环境噪声标准超标以后，才尽力对小区区域环境进行声学处理与改善。

In the past construction course of residential quarter planning , the recognition degree of controlling acoustics environment is not enough .

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。

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

目前国内外不断加严摩托车噪声标准，发达国家正在斥巨资研究摩托车加速行驶噪声的控制。

Because of the more stringent statutory pass-by noise requirements at home and abroad , the developed country furnished funds for researching the noise control of motorcycle .

现有噪声标准一般采用基于对人听觉影响的A声级作为评价量指标，而忽视了噪声对人的心理和精神方面的影响。

The A sound level on influencing humans ' hearing sense normally adopt as an index in current noise assessment standards , though psychological and mental influence is neglected .

根据国家环保局关于区域环境噪声标准划分的规定，本文提出了区域环境噪声标准定量化划分的模型。

According to the rules of EPA on deviding the standard of environmental noise of urban area , we provide the model about quantitative deviding the standard of environmental noise of urban area .

在目前尚未对城市风景旅游公园建立专门的噪声标准的情况下，这一评价方法对正确评估城市风景旅游公园的声环境质量有积极的实用意义。

When the environmental standards in urban scenic parks have not been put forward at present , this method is important for correct assessment of the environmental noise quality of scenic parks in city .