A noise testing and analyzing system of electronic device, based on the idea of virtual instrumentation, is introduced.
介绍了一种基于虚拟仪器的电子器件低频噪声测试分析系统。
The system must reject noise even when there is no signal and, in fact, this is usually how system noise testing is done.
不过，这种对称性对于噪声抑制没有意义，系统应当能在没有信号时也能抑制噪声的发生（侵入），事实上，这通常是系统测试所需要做的。
Work floor humidity and temperature monitoring records, work floor noise testing records, records of annual testing of drinking water quality.
车间温度，湿度记录，车间噪音测试记录，饮用水年度测试。
Making a comparison between the typical standard of moped running noise testing methods and regulations (in the field of the operation requirements).
对轻便摩托车行驶噪声测量方法的典型标准和法规(在操作要求方面)做出比较。
This paper introduces the requirements for sound testing environment by the national standards for engine noise testing and proposes the targets for the construction of engine noise laboratories.
本文介绍了国家标准中内燃机噪声测试对声学测试环境的要求，提出了内燃机噪声实验室建设的指标。
Testing and analyzing of interior noise and electrical parameters are of great significance in engineering practices.
因此，对电子器件内部噪声和常规电参数的检测与分析有着重要的工程意义。
Noise source identification for the model GZ6921 bus having rear mounted engine has been car ried out by means of the noise source identification model with testing and analysing system recommended.
运用该噪声识别模型及所介绍的测试分析系统，对GZ 6921型后置发动机客车噪声源进行了识别。
Regional environmental noise monitoring of city is conventional testing work of environmental monitoring department, its objects is realizing integral status of city sound environment quality.
城市区域环境噪声监测是环境监测部门的一项常规测试工作，其目的是了解城市声环境质量的整体状况。
There must be errors for the measuring values of the first 1 order data of a system due to the noise and other factors in the Testing Model Analysis.
用试验模态分析方法测取的系统前1阶模态参数，由于噪声等多种因素的影响，具有一定误差。
In this paper several dynamic testing methods of electrohydraulic servo systems are introduced, including stochastic noise test, hammering test and sweep frequency test.
本文介绍电液伺服系统的几种动态测试方法，包括随机噪声测试，锤击法测试和扫频测试。
It is shown that the testing machine has advantages of low production cost, compact structure, high accuracy, stable and reliable, high efficiency, energy saving, and low noise, etc.
结果表明，该试验机具有制造成本低、结构紧凑、测试精度高、工作稳定可靠、效率高、节能、噪声小等优点。
The principle and the system for simulation of vehicle noise are introduced. The feasibility of the simulation method and system is verified through testing.
介绍了汽车噪声模拟的原理及噪声模拟系统的设计，并通过试验验证了该模拟方法和模拟系统的可行性。
This expression may be used as an indirect testing method of noise equivalent bandpass.
该表达式可用作噪声等效带宽的一种间接测试方法。
Barkhausen noise analysis (BNA) is a distinctive measure for testing microscopic stresses and metallurgical structure in ferromagnetic materials.
巴氏噪声分析(BNA)是一种检测铁磁材料微观应力及金相组织的独特方法。
The background noise leads a mismatch between the training environment and testing environment, and degrades the performance of speaker identification system.
背景噪声的存在，使得说话人识别系统的训练环境和测试环境发生失配，导致系统性能发生急剧下降。
In this paper, the definition and the field of application of noise resistance for the electronic noise measurement in communication testing system are discussed.
本文探讨噪声电阻的定义方法及其在通讯检测系统中的应用范围和局限性。
Finally, Based the analysis of theory modal, a modal testing program has been designed according to the existing test equipments, which prepares for the next testing of the vibration and noise.
在理论模态分析的基础上，根据现有的试验设备设计了合理的试验方案，为下步的振动与噪声的试验做了必要的理论准备。
On the basis of analysing composition and testing results of noise generated by high speed punch press the major noise sourse and the noise characteristics are pointed out.
在对高速冲床的噪声组成及其测试结果分析的基础上，指出了主要噪声源及噪声特性。
Signal processing methods used in ultrasonic testing are reviewed, which cover noise suppressing, QNDE and optimization of driving signal.
文章综合报道了信号处理在超声检测的抑噪、缺陷的定性定量分析及优化驱动信号的几方面应用。
Magnetism measuring, Barkhausen noise and magnetic acoustic emission were often used for electromagnetic testing.
电磁检测方法主要有材料磁性量测、巴克好森噪声和磁声发射。
Testing and analyzing the noise source of idle run and cutting, noise frequency characters and all kinds of methods for noise reduction for the surface planer were carried out.
试验和分析木工平刨床空转和切削时的噪声源、噪声频率特性和各种降噪方法。
For the abundant of noise in testing oil well depth with sound wave, it is difficult to locate the reflected sound wave.
在用声波测试油井油液面深时，反射声波受到大量杂波干扰，给接箍波和液面波的定位带来了极大的困难。
All the noise just happened seems to have no access to his ear, because he was dedicated testing how much food can be piggy back home by a worker ant one day in the end.
似乎刚才的一切喧闹都没有进入到他的耳朵里，因为他正在专心致志地测试一只工蚁到底一天能驼回多重的食物回家。
The Agilent 81150a pulse function arbitrary noise generator provides versatile waveforms for pulse generation as well as noise generation for stress testing.
安捷伦81150A脉冲函数任意噪声发生器可为脉冲发生提供多用途波形，还可以为压力测试提供噪声发生。
Measuring and testing that the noise reduction performance of the silencer was good enough to requirements of use.
经测试表明，降噪性能良好，满足了使用要求。
The comparison method in phase noise measurement system is introduced by means of the advanced way in interlaboratory comparison and proficiency testing.
通过采用国际上先进的实验室比对和能力验证方法，提出了相位噪声测试系统的比对方案。
This thesis, devoted to the study of cultural elements in language testing, is an attempt to look into the sources, effects of and solutions to intercultural noise in language testing.
本论文通过聚焦英语语言测试中的跨文化噪音，从跨学科角度系统地探讨语言测试中的文化因素。
This thesis, devoted to the study of cultural elements in language testing, is an attempt to look into the sources, effects of and solutions to intercultural noise in language testing.
本论文通过聚焦英语语言测试中的跨文化噪音，从跨学科角度系统地探讨语言测试中的文化因素。
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