noise cancelling circuit

An analysis on the fan noise pollution in paper mill and its control;

纸厂风机噪声污染分析与控制方法

Transformer substation noise pollution assessment and its control;

变电站环境噪声评价与防治

One approach to reducing noise of automobile rear axle gear assembling;

一种降低汽车后桥装配中齿轮噪声的途径

Adopting the Nonsymmetrical Dents of Gear to Reduce the Abnormal Yawp of Gear Pump;

采用非对称齿形减小齿轮泵的异常噪声

Design of Software and Hardware Sound Sampling System for Pumping Station;

泵站噪声采集系统的软硬件设计

Design of Sound Acquisition and Analysis System for Hydraulic Pump Station;

一种液压泵站噪声采集和分析系统的设计

The Research of Testing Method for Hydraulic Shock Absorber Sound;

液力减振器噪声检测方法的研究

Noises Comparison Between Axial-flow Fan and Centrifugal Fan and Methods of Deereasing of Noises;

轴流式与离心式风扇噪声比较及降低噪声措施

The influence and prevention of highway noises to people;

公路噪声的产生对人的影响及其防治

ECG analysis on still rolling workers exposed to high temperature and noises;

对接触高温噪声的轧钢工人心电图分析

The author puts forward a research method recognize vehicle licence plate with noisy base on artificion neural network .

提出一种用神经网络识别带有噪声字符的研究方法。

Objective: the difference of speech recognition score (SRS) of children treated with cochlear implantation(CI) or hearing aid (HA) in quiet and noisy environment were analyzed to help language rehabilitation.

目的通过分析语前聋人工耳蜗植入(CI组)与戴助听器(HA组)儿童在安静环境和在不同噪声环境中的言语识别率的差异，为实施言语康复方案提供参考。

From the operating theory of switching supply transformer, the article put forward a simple and easy method to design it:according to operating frequency and output power, choose the magnetic cores which is necessary to design transformer so as to calculate parameter of coil; besides, discuss how to restrain the noisy.

本文从变压器设计的基本原理出发,提出了一种设计开关电源变压器的简便方法,即直接根据变压器的工作频率和所需输出的功率查表确定所需选用的磁性材料,从而确定变压器线包各参数;并对如何抑制电源变压器常见的噪声干扰进行了探讨。