脉冲

The small concrete blocks and big concrete plate were constructed for the experiment. The dielectric constant and the attenuation index obtained by the first 1 and 1/2 waveforms reflected from the concrete surface are used as the parameters.

研究使用1GHz天线，经由实验分析采用抬高天线与受测物距30cm方式检测混凝土，将测得混凝土反射波形计算出介电常数，并选择反射脉冲波形1又1/2振幅面积来做为量测标的，将火害前后振幅面积计算求得衰减常数，比较火害前后混凝土之差异性。

The compensator was H = 2370s . The results of simulation showed that attenuation factor of the first order of the third control system was as much as ten times of the value of the system without controller.

通过仿真表明，采用速率传感器，在前三块帆板上布置压电驱动器时，一阶最大衰减因子为无控时的10倍，可以使脉冲衰减时间缩短15倍。

In this paper,the asymptotic property for two kinds of ecological systems and oscillation for solutions of a neutral differential equations is studied by employing differential inequalities and using eigenvalue analysis,iterative algorithm,induction and comparison theorem etc.Here, the system\'s asymptotic property includes the uniform persistence,the global attractability of the solutions,the asmptotic stability of the solutions and the oscillation of solutions.

本文利用微分不等式、特征根分析法、迭代法、归纳法及比较原理等方法和理论，研究了两类生态模型解的渐近性和一类脉冲中立型微分方程解的振动性，其中包括模型的一致持久生存性，正平衡态的全局吸引性、局部与全局渐近稳定性以及解的振动性。

These ultrasonic oscillations may be continuous, but in most cases they are short bursts of ultrasonic energy, stimulated by various amplitude peaks of the audible signal, and dying out quickly, but recurring frequently.

这些超声波震荡可能是连续的，但大多数情况下，它是由可听范围信号电平的不同峰值激励产生的一些超声能量的短脉冲，很快消退但频繁的出现。

In Amplitude Analysis in time domain, the step impulse response acts as an important parameter to evaluate the performance of audio device. It reflects the response sensitivity of audio system to sudden changed signals.

在音频设备的时域特性分析中，阶跃脉冲响应检测是衡量系统性能的重要方法，它反映的是音频设备对于突变信号的响应灵敏度。

A high-powered infrared autocollimator is adopted to ensure 2 of spatial resolution, a 15GHz oscilloscope is used to capture the laser pulse as narrow as 100ps, and an accurate laser power meter with large dynamic range is used to obtain accurate energy measurement of the laser pulse.

通过引入红外自准直仪使系统的角分辨率达到了2，借助示波器捕获窄达100ps的激光脉冲，高精度、大动态范围的激光能量计可精确测量出激光的能量。

A new method of weak periodic pulse signal based on combining autocorrelation function with chaos theory was proposed.

简述自相关检测的原理及混沌理论，在此基础上，提出将自相关检测与混沌理论相结合检测微弱周期脉冲信号的检测方法。

Based on the theory of phrase staying and the autocorrelation function, we design better performance nonlinear frequency modulation pulse compression radar.

基于逗留相位原理以及信号的自相关函数，设计了一种性能十分优越的非线性调频脉冲压缩雷达体制。

Finally, we research the three design of pulses train, and analyze their performances of autocorrelation function、 ambiguity function and spectrum.

主要研究了三种脉冲串设计方法，并分析了自相关函数、模糊函数、频谱等性能指标。

An autocorrelation algorithm for real-time detection of radar pulses is proposed in this paper.

提出了一种能够实时检测雷达脉冲信号的自相关算法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。