By J.R. Nyquist On Sunday I spoke with Luke Harding, the Guardian (UK) Moscow bureau chief who was expelled from Russia on 5 February 2011. “For you Russia is closed,” he was told when returning to Moscow after a trip to Britain. His Russian visa was annulled and he was bounced o...
在输入信号的基波频率低于Nyquist频率,但信号谐波高于Nyquist频率时,您可能会在示波器显示屏上看到边沿“摇摆”的波形。为此,安捷伦在传统上一直把具有高斯滚降特点、带宽较低的实时示波器的带宽限定为取样速率的¼,也就是Nyquist频率的½ ,目的是滤除高于Nyquist的谐波成分。 对某些带宽在2 GHz - 6 GHz之间的带宽...
3)调频范围大:一个负反馈环的带宽输出参考频率决定了模拟锁相环的稳定的调频范围;整片的DDS合成器是不受稳定性的影响的,在整个Nyquist频率范围内是可调的。 4)相位噪声小:DDS优于PLL的最大优势就是它的相位噪声。由于数字正弦信号的相位与时间成线形关系,整片的DDS输出的相位噪声比它的参考时钟源的相位噪声小。
这个名单给出的名额明确是统考一志愿录取名额，右上角就有说明。另外今年南航复试很有可能破天荒在调剂（...
如果当年六十大多的叔梁纥娶了十不到二十的颜徵在，几千年中国人的精神明灯孔子就不会诞生。
A proprietary, dynamic output architecture permits synthesis of analog outputs even above Nyquist by shifting energy away from the fundamental and into the image frequency. A serial peripheral interface (SPI) port provides full programmability. In addition, some pin-programmable features are offered for...
The ADS8028IRTJR employs digital error correction in order to provide excellent Nyquist differential linearity performance for demanding imaging applications. Its low distortion, high SNR, and high-oversampling capability give it the extra margin needed for telecommunications, test instrumentation, and vide...
The Last Word Commentary for 9 October 2016 By J.R. Nyquist "The problem today is that people are so monstrously self-centered that they are incapable of viewing themselves as anything other than the sole [beneficiaries] and culmination of history when in fact we are all just bricks in the...
( = 149 Ma) in the early Solar System as established by correlated Sm/Nd and ^(142)Nd/^(144)Nd in meteorites (Lugmair and Marti, 1977; Lugmair et al., 1983; Jacobsen and Wasserburg, 1984; Prinzhofer et al., 1989, 1992; Lugmair and Galer, 1992; Nyquist et al., 1994; Stewart...
图2. 不同温度下Zn对称电池与(a)GF和(b)D-4-ChNF隔膜的Nyquist图;(c) 使用GF、D-0-ChNF和D-0-ChNF隔膜的Zn对称电池的Arrhenius曲线和相应的脱溶剂活化能值;(d)用于计算离子电导率的Nyquist图;(e)基于GF、D-0-ChNF和D-4-ChNF隔膜的Zn-Ti半电池的CV曲线;(f)在1 mA cm-2和1 mAh cm-2处的...