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- error of frequency measurement 测频误差
- This article expounded the measurement and error.It analyzed and discussed the measurement error of frequency in standing wave method both theory and practice. 阐述测量及误差,从理论计算和实际测量两方面对驻波法测量频率产生的误差进行分析讨论。
- The frequency measurement algorithm can accurately track the system frequency by adjusting the amendatory coefficient in real time according to the error of the original Fourier frequency measurement algorithm. 测频算法根据传统傅氏测频算法存在的误差,通过实时调整修正系数的方法,实现了高精度地跟踪系统频率。
- Circle Center Fitting (CCF), a phasor method of frequency measurement, is innovated and proved, and it has the practical value of engineering. 提出并论证了“圆心拟合法”相量测频方法,具有一定的应用价值。
- Along with the increase of frequency, the meter measure error add, and the error of induction watt-hour meter relate to harmonics times and harmonics power. 感应式电能表随着频率的增加,计量误差加大,具有下降式的频率特性; 感应式电能表的计量误差与谐波次数的高低、谐波功率的大小、谐波功率的方向有关;
- A method of frequency measurement based on HSI(High Speed Input) of 80C196 is proposed. It is discussed that voltage sampling frequency tracks signal frequency according to the reasult of frequency measurement. 提出了一种基于 80 C196单片机 HSI的频率测量方法 ,并依据测量的频率来改变电压的采样时间间隔 ,实现频率跟踪功能。
- The conclusions are (1) The scale factor of frequency between large and small perspex model test accord with similitude law basically. The error of primary frequency is 2.7% or 4.1%, the error of the second frequency is 0 or 6.05%. 得到了以下结论:(1)大小模型频率符合相似律;一阶频率误差为2.;7%25、4
- A unit of frequency equal to one cycle per second. 赫兹频率的单位,等于每秒一周
- By the method of frequency measurement,instant rotational speed is measured in the test system,angular acceleration is calculated by using the feature of the MCU with the least square method. 介绍了一种发动机无外载功率检测系统的软、硬件设计,利用测频法测量出某一时刻的瞬时速度,并利用最小二乘法求出角加速度。
- Thus the allowable error of area measurement was setted. 确定出该仪器量测图形面积时的容许误差;
- He has made serious errors of judgement. 他在判断上犯有严重错误。
- Thus he committed the error of"left" opportunism. 就这样他犯了“左”倾机会主义的错误。
- Increase Design of Frequency Measurement of Digit Multimeter 增加数字万用表测频功能的设计
- The survey has a margin of error of 2.5%. 测量的误差幅度为 2.;5%25。
- But it is a pity that owing to the inaccuracy of the traditional methods for measuring this spacing, the errors of frequency response of most current test tape all over the world will be at over 20% or 2dB. 遗憾的是,由于测量这种间隔的传统方法不准确,致使目前世界上流行的多数测试带,其频率响应误差在20%25或2dB以上。 本文提出一种用固定频率、变化波长的措施测量头、带接触面之间非磁性间隔的理论和方法。
- The biggest error of life is self-rejection. 人生最大的错误是自弃。
- Where do we usually put adverbs of frequency? 频度副词我们通常放在哪里?
- Analyzes principle and error of this method. 分析了这种方法的原理和误差。
- A unit of frequency equal to one billion(109)hertz. 十亿赫兹频率单位等于十亿(109)