噪声水平

CDMA系统容量决定于系统中的噪声水平以及业务质量的要求。

The capacity of CDMA is limited by noise level and quality of service .

GPS接收机系统软件对内噪声水平有着非常重要的影响。

Third , the system software installed in GPS receiver has a very important influence on interior noise level of GPS receiver .

本文基于降低发动机噪声水平这一前提，致力开发降噪用V型波纹管。

This paper tells us how to develop noise reduction V-shaped accordion pipe Ω to reduce the noise of engine .

Kirchhoff公式在电容器装置噪声水平预估中的应用

Application of Kirchhoff Formula in Prediction of Noise Level of Capacitor Installation

由测试实例得到如下结论：GPS接收机内噪声水平评价方法以及检测方法更加合理、可信；

Through the case , we can draw the following conclusion : First , the method of appraisal and testing of this paper is more rational and credible .

当α≥2.0时，在噪声水平为0.2的情况下，计算得到的最大Lyapunov指数的误差小于10%。

When α≥ 2.0 and noise level is 0.2 , the error of the estimated largest Lyapunov exponent is less than 10 % .

提出使用随机噪声水平Ms来作为衡量台站资料中随机噪声的一项标准。

This study presents that the stochastic noise level M_s is taken as a standard which is applied to the appraisement of stochastic noise in observed data of stations .

发现PIC中的噪声水平会影响不稳定性的空间因子进而影响不稳定性的时间增长率。

We find the noise level in PIC might affect the spatial factor and thereby affect the temporal growth rate .

随着重建间隔改变，相应噪声水平的差异无显著性意义（P>0.05）。结论：与常规扫描相比，螺旋CT内插方式对噪声有一定影响，而螺距与重建间隔对噪声水平影响不明显。

Conclusion : In spiral CT , there is certain influence on image noise level with different linear interpolation techniques used , but there is no significant effect when pitches and reconstruction intervals are changed .

从Lorenz和Chen′s系统获得多维时间序列，分别对加不同噪声水平的时间序列检验方法的有效性，并比较不同噪声水平对方法的影响。

We obtain differently multidimensional time series from Lorenz and Chen ′ s systems , and test the above method by the time series with different noise level .

应用奥贝球铁（ADI）代替合金钢制造传动齿轮并进行齿形修正，显著降低噪声水平。

The gears of austempered ductile iron ( ADI ) and the gear profile modification technique can effectively reduce transmitting gear 's noise .

如何降低车内噪声水平，改善汽车NVH性能，提高车辆乘坐舒适性，具有重要的经济效益和社会效益。

How to reduce the vehicle interior noise , improve vehicle NVH performance and riding comfort , has important economic and social benefits .

初始领域半径的选取采用了基于G-P关联维法的噪声水平的初始估计方法。

Furthermore , initial neighborhood radius was computed by the estimated noise level based on the G-P saturation correlation dimension method .

在机动目标跟踪中，为了保证Kalman滤波器的数值稳定性和最优性，未知的时变系统噪声水平需要在线估计，但已有方法主要针对平稳或统计特性缓变的噪声过程。

In maneuvering target tracking , to ensure the numerical stability and optimality of Kalman filter , the unknown time-varying system noise variance needs to be estimated adaptively , but the existing methods are mostly limited to systems with stationary or slowly-varying noises .

该研究提出在道路交通干线两侧区域内采用每季度任意连续7天监测数据中的Ld、Ln均值代表本季度昼、夜间噪声水平。

This paper adopts the monitoring data of wanton 7 days in succession in each quarter , represents daytime and night noise level of both sides of road traffic area of this quarter with Ld , Ln mean value .

本文对前人在MRI图像分割方面的工作进行了系统地总结，并在此基础上提出了一种结合NLM算法思想的FCM方法，提高了噪声水平较高的MRI图像的分割的准确性。

In this thesis , previous works on MRI image segmentation are summarized before a new image segmentation algorithm combining NLM and FCM is proposed . It is proved that the proposed algorithm improves the accuracy of the image segmentation of noised MRI images .

结果表明，30d、120d、240d周期的功率谱时间函数，能在原始观测资料中识别出接近噪声水平的中强地震前兆信息。

The result shows that the power spectrum time functions ( PSTF ) can discriminate precursors before moderately strong earthquakes , which close to noise level , from the original data .

时域有限差分（FDTD）方法作为解决电磁场问题的几种主要的数值方法之一，在进行电磁仿真的时候在FDTD中需要引入低噪声水平的波源，特别是在仿真弱散射问题时。

The finite-difference time-domain ( FDTD ) method , as one of the main methods of numerically solving electromagnetic problems , requires the introduction a volume source into FDTD computational domain , which should has a very low noise level , especially when observing weak scattering .

仿真和实验结果表明：LMSD算法使噪声水平比经典的乘法解调算法下降了29%；

Simulation and measurement results show that the LMSD algorithm can improve noise performance by 29 % compared with the typical multiplication method .

利用改进的Elman神经网络对3个典型的混沌时间序列在不同的噪声水平下进行预测，探讨了神经网络学习与泛化之间的关系，通过试凑法给出了Elman最优的隐节点个数。

This paper uses the improved Elman neural networks to predict three typical chaos time series under different noise conditions . It also discusses the relationship between learning and generalization of the neural networks and gives the optimal number of Elman 's hidden layer units .

阐述变压器电工钢、HIB钢对变压器空载损耗与噪声水平的影响，并对2005年和2010年的取向硅钢消耗量进行了预测。

Effects of adopting transformer electrical steel and HIB steel on no-load loss and noise level of transformer are analyzed . In addition , a forecast to the annual consumption of oriented silicon sheet for 2005 and 2010 is given .

本研究用绝对辨认法与信号清晰度和响度适宜性主观评价测试了60、70和80dB（A）三种噪声水平下与言语通讯同时呈现的高优先权音调信号的最小强度增量要求。

The study explores the minimal intensity gain of high priority tone signals presented on the background of speech communication at three noise levels of 60,70 and 80 dB ( A ) .

介绍了能降低夜间运行噪声水平的新型散热冷却器，分析了当变压器顶层油温升达55K时，由于热传递响应速度的原因，此时绕组平均温升可能已超过65K。

A new radiative cooler which can reduce the noise level in night is introduced . When the oil temperature reaches 55K , the winding average temperature rise will exceed 65k due to the response speed of heat transfer .

噪声水平是工程机械的一个重要性能指标。

Noise level is considered as a significant performance index .

厂房悬挂吸声体降低噪声水平的研究

Experiment in reducing the noise in the workshop using suspended sound absorbers

潜艇航行时舱室中噪声水平的探讨

An approach to noise levels in submarine compartment during voyage

一种带未知时变系统噪声水平的目标跟踪滤波器

A Target Tracking Filter with Unknown Time-varying System Noise Variance

国产30万千瓦汽轮发电机组噪声水平的模糊聚类

Fuzzy Classification of Noise Level of 300 MW Turboset Produced in China

森林公园的平均噪声水平达到国家0类区域环境标准。

Average noise level in forest park attains national first class standard .

基于改进S变换估计电能质量信号的噪声水平

Noise Estimation of Power Quality Signal Based on Modified S-Transform