查询词典 signal noise ratio

S, M Series Atomic Absorption Spectrometry in a new Echelle optical system, providing unparalleled detection limit; Four unique background deduction of deuterium lamp technology, the results more accurate calibration can be as high as 3A background correction; Patent protection Stockdale dual-beam technology, are the sensitivity and high signal to noise ratio; unique exchange Zeeman background deduction graphite furnace technology; ELC unique long-life graphite tube; GFTV unique graphite furnace visualization technique

一、 S 、 M 系列原子吸收光谱仪采用全新的中阶梯光栅光学系统，提供无与伦比的检出限；独特的四线氘灯扣背景技术，校正结果更准确，可校正高达3A 的背景；专利保护的 Stockdale 双光束技术，得到极高的灵敏度和信噪比；独特的交流塞曼石墨炉扣背景技术；独特的 ELC 长寿命石墨管；独特的 GFTV 石墨炉可视技术

The number of bits on each subchannel depends on the Signal-to-Noise Ratio of the subchannel.

每个子信道上的比特取决于该子信道的信噪比。

Correlation and signal-to-noise ratio of the space sources can affect the resolution of DOA estimation of subspace algorithms. Using this relation, the algorithm changes the correlation and SNR of the equivalent sources by processing the Toeplitz matrix based on the Toep-MUSIC algorithm, so that the resolution of DOA estimation can be improved.

改进算法利用信源间相关性和信噪比对子空间类DOA估计算法分辨力的影响，在Toep-MUSIC算法基础上，通过对Toeplitz重构矩阵的处理，改变了等效信源的相关系数和信噪比，从而使DOA估计分辨力得到提高。

THD+N: 20-Hz HPF, 20-kHz AES17 LPF Dynamic range: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted Signal-to-noise ratio: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted Channel separation: 20-Hz HPF, 20-kHz AES17 LPF Analog performance specifications are measured using the System Twot Cascade audio measurement system by Audio Precision in the averaging mode.

的THD + N：20 Hz的高通滤波器，20千赫AES17 LPF的动态范围：20 Hz的高通滤波器，20千赫AES17低通滤波器，A加权信号噪音比：20 Hz的高通滤波器，20 kHz的AES17，A加权频道分离低通滤波器：20 Hz的高通滤波器，20千赫AES17 LPF的模拟性能指标均采用了精密音频系统Twot梯级音频测量系统中的平均模式。

The ultrahigh frequency portable reader obviously improves the signal-to-noise ratio of RFID antenna for receiving signals, improves the reading and writing distance, reduces the influences of the environment on the signals and has the advantages of low cost and good effect, etc.

本发明显著改善了RFID天线接收信号的信噪比，提高了读写距离并减少了环境对信号的影响，具有成本低、效果好等优点。

Compared with the uncompensated case, the signal to noise ratio increases about 15 fold, and spatial resolution is highly improved.

相对于未补偿的情况，信噪比改善15倍以上，空间分辨率显著提高。

The method has good stability and low estimation variance even if the signal-to-noise ratio is quite low.

利用旋转不变技术的参数估计方法[3-5]出现于多信号分类法MUS

To aim at parameter estimation of signal to noise ratio and high variance in low SNR based on time frequency distribution, this paper proposed a novel algorithm based on multimodal particle swarm optimization.

针对基于时频分布的参数估计存在信噪比阈值和低信噪比下方差大的问题，提出了一种基于多峰优化粒子群算法的跳频信号参数估计新算法。

This paper introduces the research and implementation of all-purpose high-speed test adapter for ADC. The main contents includes two methods about how to testing the static parameters and dynamic parameters for ADC. The servo loop method is proposed to static parameters, by using the test principle of high-precision voltage source, high-precision voltage meter and digital comparator. To dynamic parameters, the DDS chip of AD9851 is used to generate sine waves with high signal to noise ratio, then the high-s...

servo loop ； FFT ；本文介绍了关于ADC高速通用测试适配器的研究和实现，主要介绍了测试ADC芯片静态参数和动态参数两种方法，针对静态参数，提出了用伺服环的方法，采用高精度电压源，高精度电压表和数字比较器的测试原理；针对动态参数，提出了用DDS芯片AD9851产生高信噪比的正弦波，采用高速采样模块采集数据，最后用FFT算法对采集的数据进行处理。

This paper systematically researched this sort of nonuniformly sampled signals'digital spectrum structure, signal-to-noise ratio , the response of D/A converter with nonuniformly sampled signals, the algorithm for estimating timing offsets, the relationship between the discrete time expression of the total energy and the continuous time expression, the estimation of the average power, the algorithm of recovery and application in designing and analyzing the digital waveform synthesizer.

本文全面系统地研究了这类周期性非均匀采样信号的数字谱结构，信噪比表达式，数模转换器对非均匀采样信号输入的响应，误差校正算法，时域与频域的能量对应关系，对功率测量的影响，内插恢复算法，以及在设计和分析数字波形合成器中的应用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。