A relation between average alias attenuation and filter order and sampling rate is derived from calculation.
通过计算导出了平均假频衰减与滤波器阶次及采样率的关系式。
A kind of inverse sampling filter is designed in order to compensate this attenuation and some methods is proposed to save the design resource.
文中设计了补偿此衰减的数字滤波器，并提出一种节省资源的高效实现方法。
The ground reflection and attenuation must be properly accounted for in order to use the source spectrum measured at the site of the observer to predict the actual source spectrum in the free field.
为利用观察点处实测声频谱来预估实际声源自由场频谱特性，必须适当地计及地面反射和衰减效应的影响。
In order to meet the traceability of large attenuation, a new model PAS-1 attenuation measuring receiver and then a new national attenuation standard system are developed.
为了满足大衰减量值的溯源，研制成功了新的PAS 1型衰减测量接收机和新的国家标准装置。
In order to solve the problem, the calculation formula of microwave attenuation constant and phase constant of weakly ionized dusty plasma was deduce.
为了解决这一矛盾，在尘埃等离子体理论基础上，导出了弱电离尘埃等离子体的微波衰减常数和相位常数计算公式。
The results show that there exist attenuation in all propagation modes along viscoelastic cylindrical tube, and higher-order propagation modes haven't cut-off frequency.
分析结果表明与弹性圆柱管相比粘弹性圆柱管中轴对称波的各阶传播模式均存在衰减，高阶传播模式并无严格意义的截止频率。
In order to study the attenuation of neurovirulence of SA14 14 2 attenuated vaccine virus, monkeys and mice were tested with the strain and its parent SA14 virulent strain.
为了解乙型脑炎（乙脑）减毒活疫苗弱毒株SA14142神经毒力的减弱程度，本文对弱毒株及其原株SA14强毒株进行了猴体和小白鼠的致病性和病理学变化的比较试验。
Such problems as the attenuation of DC elements and Sine waveform, voltage sag and frequency deviation should be taken into account in order to analyze the transient process in the power system.
要分析电网的暂态特性，还必须考虑衰减直流分量和衰减正弦波，以及电压缺口和频率偏移等问题。
The temperature correlation of ultrasound attenuation coefficient in the organization of microwave hyperthermia is researched in order to achieve non-invasive organization temperature.
研究微波热疗组织超声衰减系数的温度相关性，以期实现肿瘤微波热疗超声无创测温。
The results show that, due to the effect of viscoelastic damping, the attenuation coefficient increases with the increasing of modal order, while the vibrational frequencies decrease with it;
计算结果表明，在粘弹性阻尼作用下，衰减系数随振型阶数而增大，振动频率随之不断减小；
Second-order sliding mode controller and automatic carrier landing system is designed. The result of simulation research shows the system has good capability of air attenuation.
仿真对比研究表明二阶滑模控制下的着舰导引系统有较好地抑制气流扰动的能力。
The high-order multi-band-pass FIR filter designed with this algorithm is featured by big attenuation in stop-band and small ripple in pass-bands.
用该算法设计的高阶多通带滤波器，其幅频响应的阻带衰减很大，而通带波动很小。
The high-order multi-band-pass FIR filter designed with this algorithm is featured by big attenuation in stop-band and small ripple in pass-bands.
用该算法设计的高阶多通带滤波器，其幅频响应的阻带衰减很大，而通带波动很小。
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