频率

A new concept method of macroscopic-scale simultaneity potentials both sensory and motor controlling was brought forward to analysis, based on a new trend in neuroscience-oscillatory brain theory and neocortical dynamics work.

提出脑电位中具有基本信号频率和功能信号频率的存在。

The low/mid crossover frequency is sweepable from 60Hz to 1KHz providing an ideal frequency split between your subs and mid drivers and the mid/high crossover point is sweepable from 1KHz to 9KHz giving you enough range to effectively send an appropriate bandwidth to your mids and tweeters.

低/中交叉频率sweepable从60赫兹到1kHz时提供之间的潜艇和中司机和中/高的交叉点，是理想的频率从1kHz分裂sweepable到9KHz给你足够的范围，有效地发送一个合适的带宽和您的中频高音喇叭。

The measurement calibration service for ac voltages in the millivolt ranges was previously provided only in the frequency range from 40 Hz to 10 kHz, where suitable calibrated ac voltages were produced by means of an inductive voltage divider.

为在毫伏范围内交流电压服务的计量校准只由从40赫兹至10千赫的频率提供，在这个频率范围内交流电压的合适校准是由归纳分压器的方式产生。

The effect due to the stability of the laser frequency is observed, and the method of minimizing the effect of frequency jitter is proposed.

对激光频率稳定性进行了实验研究，提出了测风激光雷达中去除激光频率抖动影响的方法。

The probe was tone burst and its frequency was the same as neuronal characteristic frequency . The effects of different maskers on the minimum threshold, response latency, dynamic range and firing rate of the mouse inferior colliculus neurons were observed in the experiment.20 healthy adult mice 20-25 g.

探测声频率为神经元的特征频率(characteristic frequency， CF)，掩蔽声分别为和神经元CF相同的短纯音掩蔽声和上扫调频掩蔽声(up-sweep frequency modulation masker)。

We expect it will benefit the industry field to break through the optical measuring limits at present by offering some new ideas. Optical measuring research based on moire interferometry has developed for several decades. The main idea of this research is to utilize the moire effect caused by two superimposed gratings of identical or similar spatial frequency. One is the reference grating and it is a virtual grating created by a computer program in this research; The other grating is the image of grating projected on the measured surface by the DLP projector, and this grating will distort because of the different sloped profile of the surface. To superimpose the program-created grating and the captured distorted grating will derive the so-called moire effect. This research combined the basic theory of optical interferometry and moire effect to project the different phases of the projected grating fringes by the phase-shifting method and compute the principal value of arguments between -π,π. In the end, the phase unwrapping program based on discrete Fourier transform of solving PDEs is used to unwrap the phase of the measured surface, and finally the surface profile is derived by the optical measuring system.

以叠纹干涉术为基础的光学检测研究之发展早已行之有年，而在本研究中所采用的投影叠纹法(Projection moiré)之主要精神在於藉由两道空间频率相近或相同的光栅相互叠加而成的效应，其中一道为参考光栅，而本研究中的参考光栅是以程式产生可调整不同空间频率的虚拟光栅；另一道则为投影至待测物表面的光栅影像，而在起伏高度不一的待测表面上的光栅影像会受到待测物表面起伏状况不同而在观测方向产生光栅投影条纹影像的歪曲变形，将电脑产生的参考光栅与由影像撷取装置所获取投影於待测物表面的光栅影像作叠合，便会产生所谓的叠纹效应；利用基本的光学干涉理论与叠纹效应结合，本研究中以相移法来改变投影於待测表面的光栅相位，再以相移法的理论反运算出在带有待测面各点高度资讯之介於-π，π相位主幅角，再以离散傅立叶转换解偏微分方程的相位重建程式还原待测面的相位值，以得知待测面之表面轮廓。

At radio-frequencies the dielectric permittivity of cell suspensions are monotonic function of the measuring frequency and cell density.

微生物的存在会改变发酵液的电特性，发酵液在无线电频率范围内的电容率增量是测量频率和生物量浓度的函数。

Based on that the dielectric permittivity of cell suspensions is monotonic function of the measuring frequency and cell concentration at radio-frequencies,a new method for detecting cell concentrations on-line and in-situ is proposed .

利用发酵液在无线电频率范围内的电容率是测量频率与菌体浓度的函数，提出了一种实时在线检测发酵过程菌体浓度的新方法，设计了检测传感器和自动检测系统，并且实验验证了该检测方法及检测系统的可行

To analyze the response of pavement structure under moving loading, a quarter vehicle model with single freedom degree and unevenness model are established. The dynamic loads are calculated through combining different pavement conditions and speed. When the incentive frequency which is passed to vehicles by the road is close to its own vibration frequency, vehicles will produce the greatest dynamic load.

为了分析路面结构在行车动荷载作用下的力学响应，建立了单自由度1/4车辆模型和以正弦曲线模拟路面不平整度的模型，通过将不同路面状况和行车速度的组合，分析车辆在各情形下所产生的动荷载，发现路面传给车辆的激励振动频率接近车辆自身振动频率时，车辆对路面产生的动荷载值最大。

By measuring the instantaneous value of short-wave spectrum, we can get an important parameter of the local ionosphere, foF2, and then work out the MUF of the electrocircuit.

通过对测试结果进行统计分析可以得出：短波频谱的一阶矩ICF和电离层F2层临界频率f0F2具有很好的相关特性，通过测量短波频谱的瞬时值可以得到本地电离层的重要参量f0F2，进而可以计算出电路的最高可用频率。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。