查询词典 noise-power-ratio

This invention relates to three-dimensional seismic data processing quality monitoring technology. Selecting time-window and analysis frequency for FFT to obtain frequency-domain conversion result for every channel; taking mean-filter to obtain the statistic excited energy or noise disturbance; plotting all results on plane graph to monitor the 3D excited energy or noise disturbance; taking normalization and autocorrelation to all earthquake channel; summating all autocorrelation statistic result to obtain opposite statistic autocorrelation result; finding out and plotting the zero-crossing of autocorrelation on plane position for monitoring excited wavelet.

本发明涉及一种三维地震资料处理质量监控技术，步骤是：选定时窗和分析频率；对某炮各地震道在时窗内做快速富立叶变换，得到道数据在频率域变换结果；对同炮的所有地震道做频率域中值滤波，得到该炮的统计激发能量或噪声干扰量结果；将所有炮的计算结果绘到各炮点平面图上，监控三维激发能量或噪声干扰；对地震数据某炮的各地震道做归一化自相关；对同炮的所有地震道的自相关统计求和，得到该炮的统计自相关结果；寻找该炮统计自相关的零交叉时，将所有炮的零交叉时绘到各炮点平面位置上，完成激发子波监控。

Essentially,the subtractor feeds the supply noise directly into the feedback loop of the bandgap circuit which could help to suppress supply noise.

本电路的基本工作原理是将电源噪声直接添加到电路的反馈环节，帮助抑制电源噪声。

The subtractor feeds the supply noise directly into the feedback loop of the bandgap circuit which can help to suppress supply noise and improve the PSRR.

在传统带隙基准电路结构的基础上，采用添加新的电压支路，在环路反馈网络中直接引进噪声的理念，提高了电源抑制比。

Based on the optimal filters, various recursive algorithms of the optimal smoothing estimation under white-noise condition are derived, and problems of reducing storage requirements and computational load for the fixed-interval smoothers are discussed, moreover, optimal smoothers under various noise conditions are proposed, thus, the optimal state smoothing theory is founded.

在最优滤波算法的基础上，本文推导出白噪声情形下的状态最优平滑估计的各种递推算法，讨论了减少固定域平滑的存贮空间和提高运算速度问题，并提出了在多种噪声条件下的平滑估计方法，从而建立了这类系统的状态最优平滑估计理论。

In this paper a microwave standard noise source which produces noise by healing a metal filament is described.

本文介绍了一种用加热金属丝来产生噪声的微波标准噪声源。

Through the research on this project, a suit of applied technology and method of pass-by accelerating noise control of vehicle is built up, which also can be extended to noise control engineering in different cars.

通过本项目的研究，最终形成了一套实用的汽车车外噪声分析研究和控制的方法与技术，适合推广应用到其它相关车型的噪声控制工程实践中去。

As the state limit pass-by accelerating noise data greatly, it is important project to control the automobiles noise for automotive enterprise.

由于国家对汽车加速行驶车外噪声限值日益严格，目前汽车生产企业把降噪看作是主要的科技攻关项目之一。

Korean archery team trained against noise,imitating beijing archery yard,including those noise of Chinese rooters

韩国射箭队搞噪音热身，训练场几乎复制北京射箭场，包括观众助威的噪音强度

The near field and radiation field of flow noise are analyzed, and the noise reducing features of riblets are deduced.

5在分析流噪声的近、远场特性的基础上，进一步研究条纹表面的降噪特性。

Large excursion woofers often have more mechanical operating noise - slapping voice coil leads, and air noise from high pressure escaping from the pole piece vent

巨大冲程的低音喇叭通常有大的机械噪声-噪声来之于高速运动的音圈，高压的空气从管道边缘被释放。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。