频带

In modern digital communication systems, frequency transmission system of the most prominent.

在现代数字通信系统中，频带传输系统的应用最为突出。

The third part is about the research on the improvement of the directivity of antennas using wire medium.

然后研究谐振腔天线一些参数的对其频带和方向性的影响。

Simulation results show that this antenna can broaden the practical bandwidth for both higher directivity and impedance matching.

仿真结果显示这种改进增宽了此类天线兼顾高定向性和阻抗匹配的实用频带。

Under the basis of these, the lately widely used wavelet transform in DSP is used to wipe off the noise in the band of the signal frequency. Lastly, for its function of auto noise-resistance and double integral, the triple correlation is also used to improve the sensitivity of the receiver.

在此基础上，为了提高系统在低信噪比下的相关检测能力，采用了近来在信号处理中获得广泛应用的小波变换来去除信号频带内的噪声，并用三重相关对噪声的自动抑制作用和对信号的双重累积作用来提高接收机对回波信号的接收灵敏度。

Basing on the research of LHMs, this thesis focuses on the study and applications of LHMs to antennas.The first part is the design of double negative frequency selective surfaces.

本论文以异向介质为研究背景，研究其在天线方面的应用，主要工作包括以下三个部分：本文第一部分设计具有双负频带的频率选择表面。

Others desynchronized with 5－90 Hz primary depth electrographic after-discharges;(2) primary electrographic after-discharges were driven by primary unit after-discharges in the anterior dorsal HPC;(3) primary unit after-discharges were induced by brief primary electrographic after-discharges; and (4) plasticity of primary electrographic after-discharges and inhibition of single neuron firing were induced by repetitive ATPDH.

非同步性后放电的深部电图癫痫样电活动具有宽频带特征(5－90 Hz)；(2)原发性单位后放-后抑制效应可以引发低频原发性电图后放电，长时程爆发式单位放电可以诱发高频原发性电图后放电；(3)短束原发性电图后放电也可以诱发原发性单位后放电；(4)原发性电图后放电和神经元单位放电的抑制效应具有明显可塑性特征。

System bandwidth is one of the most important judging criteria for the performances of the electrohydraulic posit...

电液位置伺服系统中，频带宽度是反映系统性能的主要评定依据之一。

For the electrohydraulic position servo systems without high precision requirement, this method is feasible.

在对系统精度无太高要求而仅要求宽频带的电液位置伺服系统，这是一种可行的方法。

The ultrasonic emissive circuit is crucial and will affect the system profoundly.

在该流量计的研制过程中，关键是设计重复频率高的超声波发射电路和较高增益、宽频带的超声波接收放大电路。

It is based on the frequency band energy, and combined the wavelet packet analysis with the energy monitoring.

将小波包分析与能量监测相结合，提出了根据频带能量对早期故障进行特征提取和识别方法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。