查询词典 frequency response

A uniform mixture of silicon powder (granularity≤0.044 mm) and polyvinyl alcohol solution (PVA,5 wt%) in response to a certain proportion was prepared.After sieving,prilling and vibration,the mixture was packed.Effects of the vibration frequency (14～50 Hz) and time (10~230 s) on packed density of powder were studied.

摘 要：将Si粉（粒度≤0.044 mm）和聚乙烯醇水溶液(聚乙烯醇质量分数为5%)按一定比例混匀，过筛造粒后，振动装料，研究了振动频率（14～50 Hz）和振动时间(10~230 s)对粉料填充密度的影响。

These drivers are biamped with a 250-watt LF amplifier and a 120-watt HF amplifier, which provides, according to JBL, a-flat +1 dB/-1.5 dB response from 50 Hz to 20 kHz, with a low frequency extension all the way down to 36 Hz.

这些驱动程序biamped与250瓦低频放大器和1 120高频放大器，提供瓦，据JBL，一坪从50赫兹1 dB/-1.5分贝至20千赫的反应，具有低频扩展名的所有一路至36赫兹。

In the field work using the Control Source Audio-frequency Magnetotelluric method, the space between the transmitter and the receivers is up to several kilometers. In order to study the effect of the anomalous body locating at between the transmitter and the receivers, we simulate the CSAMT response using 3D Contraction Integral Equation method.

在可控源音频大地电磁法野外作业中，源和勘探区间的距离可达几公里，为了了解源和勘探区间的异常体对勘探区内异常响应的影响，我们用三维压缩积分方程法做了数值模拟研究。

The response of the photothermal photo-diffraction at a solid surface to themodulation frequency of the pump beam is studied both experimentally andtheoretically.

分别在真空和空气中对固体表面光热光衍射信号的频率响应进行了实验和理论研究。

The U 87 Ai condenser microphone is a large diaphragm microphone with three polar patterns and a unique frequency and transient response characteristic.

这个电容mic有着大膜片和三种独立指向性和单一频率还有良好的瞬态响应的特点。

To suppress the noise which caused by the fuzzy character of XLPE sample, the size of the photodetector was determined based on the analysis of the light intensity distribution in the spatial frequency plane when the laser beam passing through the sample was collected by lens. A series of detectors were designed to eliminate the time response decreasing effect caused by the increasing of the detector size. The developed laser system could resolve defects of 40 um diameter in XLPE tape with the 120um diameter and 400Hz scanning laser beam. after above results was used.

为了消除由于XLPE材料光弥散效应引起的信号噪声对信号幅度测量的影响和提高测试速度，研制了阵列组合式光电探测器，理论分析和实验验证都证明了该探测器有较好的频响特性和较低的噪声水平，应用这两项成果组成的信号系统及微机数据采集电路可在400Hz扫描频率下，扫描宽度所限制的120μm光束直径下获得40μm的测量分辨率。

Design of Infinite Impulse Response Filters by Frequency Transformations This work is produced by The Connexions Project and licensed under theCreative Commons Attribution License The design of a digital filter is usually specified in terms of the characteristics of the signals to be passed through the filter.

设计无限脉冲响应滤波器的频率变换这项工作是由连接项目和授权下theCreative署名许可设计一个数字滤波器通常是具体规定的特点，信号可以通过过滤器。

Numerical analysis is given to discuss the influence of response time and frequency detuning on the characteristics of bifurcation and noise.

以响应时间及频率失调为参变量，对其分岔及噪声等动态行为进行数值分析。

Based on the histogram of damping frequency of different component impulse response waveforms, the waveforms were divided into 4 groups: group Ⅰ(0～ Hz), group Ⅱ(2～ 5 Hz), group Ⅲ(6 5～2 0 Hz) and group Ⅳ...

总功率、Ⅰ～Ⅳ组成分波功率、Ⅱ～Ⅳ组衰减时间均随胎龄增加，有显著变化(P 0 1orP 0 5 )。提示神经系统对闪光刺激的生物电反应在早产儿脑及视神经发育评价上具有重要的临床意义

The aim of this study is to investigate the influence of the lateral nucleus of amygdala stimulation on the auditory response in the auditory cortex evoked by frequency-modulated sound.

采用在体细胞外单细胞记录方法，研究电刺激杏仁外侧核对调频声所诱发的听皮层神经元反应的影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐