查询词典 frequency

Simulation calculation demonstrates that it can correct the frequency for the single or the multi-frequency components in the discrete spectrum.

由于实际工程中的许多信号包含密集频率成分，对这类信号的识别和校正方

By means of the discrete frequency spectrum, the frequency spectrum leakage s of the conventional DFT and the DFT with a Hanning window are comparatively analyzed in this paper.

利用离散频谱详细对比分析了DFT的频谱泄漏和加汉宁窗DFT的频谱泄漏现象，讨论了用异步顺序采样值计算电量产生误差的原因，提出了利用异步顺序采样值精确计算电量的方法，实现了畸变电量的精确测量。

By defining a discriminability function and utilizing some images with synthetic defects, a parameter selection method is proposed to adapt to various fabric types when the Gabor filter bank is applied in defect segmentation. It is argued that only the real part of Gabor filter works during segmentation; the radial orientation can be limited to horizontal and vertical direction; the radial frequency and the length of the FIR filter should depend on the basic frequency of the fabric texture.

本文通过定义分辨力函数，以合成疵点图像为研究对象，提出了在实时应用中对各种不同的纹理图像能快速确定Gabor滤波器组参数的方法：疵点分割中只需用到实Gabor滤波器；方位角只需取水平和垂直方向，径向中心频率和FIR滤波器长度的选取依赖于布面纹理的固有频率。

The center frequency of emission laser signal was further chosen and the frequency discriminator was designed.

以大气和海水典型信道为例，论证了该方法在基于边缘探测技术的激光雷达中的实际应用。

Wood cutting can be divided into cont inous cutting,high frequency cutting disjointedly and low frequency cu tting disjointedly according to length of a continous cutting time and proportion of cutting time to all time.

根据一次连续切削延续时间的长短及切削时间占总时间的比例，可将木材切削分为连续切削、高频率断续切削和低频率断续切削。

The 1-4 order variation law of frequency, energy and distance of MS events before destabilizing can display the change rule of MS events. According to the variation law of the difference of frequency, energy and distance of micro seismic events before destabilizing, the fracture of rock mass can be precisely predicted. This is of great importance for safety of colliery.

微地震事件的距离、能量、频数的一到四阶差分均能够显示微地震事件的变化规律，根据未失稳岩体微震事件距离、频数、能量差分变化规律，能够准确地利用微震监测技术预报岩体破裂，这对于采用微地震监测技术解决矿山井下岩体破坏失稳预报具有重要指导意义。

The dither deviation of the master oscillator frequency is unidirectional and lower than the undithered frequency.

主振荡器的频率抖动偏差是单向的，比undithered频率较低。

It is pointed out that with emergence of various fast algorithm and high performance signal processors, the utilization of frequency domain analysis or the integration of the frequency domain analysis, statistical method and modeling method will be the trend for paper defect detect investigation.

文章最后指出随着各种快速算法和高性能信号处理器件的出现，利用频域分析或是频域分析、统计方法和建模法的结合是纸病检测研究的一种趋势。

The main results that have been accomplished in the paper are listed below: 1. Accumulated lots of experimental data of life-parameter signals with the equipment of detecting the wounded. 2. Provided a method of frequency domain signal integration based on FFT to detect non-contact life-parameter signals. 3. Built up an algorithm of lifeform identification which was based on the time and the frequency domain analysis of life-parameter signals. 4. Developed an application software of life identification for the wounded detecting equipment system S2000?

取得的主要研究结果有：1、用现有的伤员探测实验平台采集了大量生命参数信号，积累了实验数据，为信号处理及信号特征提取研究打下良好的基础；2、提出了基于FFT频域积累的方法进行非接触生命参数信号分析与检测；3、综合时域、频域中生命参数信号特征分析的实验结果，形成生命体识别算法；4、为52000—l型伤员探测装备样第2页第四军医大学硕士学位论文机研制了伤员探测生命体识别软件系统。

The average zero-crossing frequency of zero crossing detector is divided, the former generation is evaluated, the characteristic of Dopper frequency tracking loop in SPA-Ⅱ system is summarized by comparison between the two systems.

本文还对过零截点器的平均过零频率进行了推导，由此对处理机-Ⅱ型的前一代系统作了估价，在此基础上，通过比较，总结了处理机-Ⅱ型系统多卜勒频率跟踪环的特点。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"