系统噪声

在一个声学实验室内，对经过多种试验性改进的隔声机组上，进行了系统噪声试验和冷却空气吸入和排出系统等的试验，从此机组测得了70dB（A）的噪声值。

Systematic noise testing of an enclosed plant with various modifications based on in-situ experimental work , and tests on cooling air intake and exhaust systems , etc , in an acoustic laboratory , a noise level of 70 dB ( A ) was obtained for the plant .

由于单独的FFT谐波检测方法不能排除系统噪声的干扰，从而导致检测结果不够准确。

Individual FFT Harmonic detection method can not rule out the affect of the system noise .

辨识动态系统噪声方差Q和R的新方法

New Approach to Identify the Noise Variances Q and R of Dynamic Systems

为抑制系统噪声提高寻北精度，采用Kalman滤波算法进行寻北解算。

In order to reduce the influence of the system noise and increase the north-finding accuracy , a Kalman filter is used .

包括总体响应的模拟，辐射分辨率的模拟，CCD响应不一致性模拟，相机系统噪声模拟等。

Including the simulation of the overall response function , radiation-resolution , and nonuniformity of CCD response and system noise of camera . 4 .

这种方法采用直接估计增益K，避免了求解系统噪声方差阵Q和量测噪声方差阵R，使系统的稳定性增强。

This method estimates filter gain matrix K directly , avoids calculating system noise covariance matrix Q and measure noise covariance matrix R , it improves stability of the system .

通过对吞吐量和频谱效率的分析，发现MMSE检测器要优于解相关检测器，这是因为MMSE检测器还考虑了系统噪声的影响。

By analyzing the throughput and spectrum efficiency , it is found that the MMSE detector outperforms the decorrelator since the background noise is considered in the MMSE detector .

用GT-POWER建立了发动机与消声器的耦合模型，根据计算得到的发动机的进、排气系统噪声的频谱特性，提出消声器的改进设计方案，通过CFD模拟计算有效抑制消声器内部的再生气体噪声；

A coupled model of engine and muffler is built by using GT-POWER . Based on the frequency characteristics of intake and exhaust systems , a scheme for improving the design of muffler is proposed .

它不需要象Martingale函数法那样去构造一个相当困难的随机Lyapunov函数，也可放松ODE法所必需的系统噪声平稳的条件。

Comparing with the Martingale method , it does not require to build sedulously a stochastic Lyapunov function , which is usually very difficult to do . And it also omits the condition of stationary process of system noise , which is necessary in Ljung 's ODE method .

采煤机液压系统噪声的分析与控制

Analysis and control of the hydraulic system noise of coal excavator

变风量空调系统噪声评价及其控制对策

Noise Criterion and Controlling Countermeasure on Variable Air Volume Air-Conditioning System

工程机械齿轮传动系统噪声分析与控制

Noise analysis and control on gear transmission of engineering mechanics

长江750摩托车进气系统噪声分析及控制

Noise Analysis and Control of the Intakes System for Changjiang 750 Motorcycle

空调系统噪声的形成及消声方法

The noise and noise elimination method of the air-condition system

听觉系统噪声习服的实验观察

Dynamic observation on the noise conditioning of auditory system in human body

空调系统噪声控制若干问题分析

Analysis of Sound Control Questions on the Air-condition System

论文还分析了系统噪声来源。

This paper also analyzed the system noise sources .

冰箱制冷系统噪声实验研究

Experimental Investigation on Noise of Refrigeration System in Refrigerator

空调系统噪声优化控制

Optimized control of noise in air - condition systems

电源电流降低时，系统噪声又会增加，且带宽也跟着减小。

System noise increases as operating supply current drops , and bandwidth decreases .

多功能厅系统噪声的产生与抑制

The Production and Its Control Multifunctional Hall System Noise

发动机排气系统噪声的实验分析

The Experiment Analysis of the Engine Exhausting Noise

这种方法求得的噪声为接收机系统噪声。

This noise can be called system noise .

多媒体语音室系统噪声及抑制

Restrain Noises in the Multimedia Language Laboratory System

电动车刹车系统噪声产生机理与改进措施

A Study of the Frictional Noise of Motor Bicycle Disc Brake and Amelioration Measures

音频转换系统噪声的计算和要求

Audio Conversion Systems Noise Calculations and Requirements

微波通信接收系统噪声的研究

Research on Microwave Communication Receiving System Noise

分析了空调系统噪声的传递、自然衰减、再生和叠加特性。

Analyses the characteristics of transmission , natural attenuation , regeneration and superposition of noise .

丰镇发电厂送风系统噪声原因分析及降噪研究

Analysis of Noise Source and Study on Its Reduction in Air-blasting System of Fengzhen Power Station

金属排烟系统噪声治理

Noise treatment of Metal Exhaust System