频率信息 meaning in Chinese
frequency information
frequency intelligence
Examples
- This means that according to memorial frequency information the tabu length and the number of candidates are adaptively adjusted , and multitask parallel technology is realized through the arrangement of the search assignment
将自适应机制和并行技术引入禁忌搜索算法中，根据记忆频率信息自适应调整禁忌长度与候选集规模，通过搜索任务并分配安排形成多任务并行处理。 - The fruits of emulational research are obtained : 1 the method of divided planar correlation deal with wonderfully and can detect the target information of tv sound fm signal about time difference and doppler frequency with this understanding of - 20db snr
仿真研究成果： 1 、分段二维相关处理方法效果不错，能在- 20db信噪比情况下，可靠地检测到电视伴音调频目标信号的时差与多普勒频率信息。 - For those biological signals like echo of bat or whale , as well as man - made system signals like radar or sonar signal , the instantaneous frequency of signal component contains important information and could be used for signal model parameters extraction . so that the proper choose of transformed domain and signal characteristic extraction method is of crucial important . the ridge extraction method used for signal characterization was first proposed in the 1990s , it ' s based on the study of the phase of the wavelet ( or other linear ) transform
对于许多实际的信号，如蝙蝠发出的超声波、鲸鱼的叫声等生物信号，以及雷达、声呐等人造系统产生的信号而言，信号瞬时频率的变化规律反映了信号重要的特征，并且也是信号模型中关键的参数，因此选择合适的变换域提取信号的瞬时频率信息，并选择合适的方法对信号进行重建是很重要的问题。 - Section ii describes the design approach and implementation of speech module on mcf5249 coldfire core . the speech codec optimizes g . 729a codes and added voice activity detection of g . 729b to save bandwidth ; the implementation of acoustic echo cancellation uses nlms algorithm and it can reduce echo though designing adaptive fir filter and speech detector ; the dtmf and cpt generate signal using two second order digital sinusoidal oscillators and detect signal by picking up the frequency information . but only get the frequency information is not enough in cpt detector , this thesis introduces a method
其中对语音编解码器的设计采用优化g . 729a代码达到设计要求,并在此基础上加入g . 729b的静音检测模块,以进一步降低网络传输带宽;对回声消除器的设计采用nlms算法,通过设计自适应fir滤波器和语音检测器达到回声消除目的;对双音多频设计,信号发生端采用构造静态参数表并通过二阶正弦振荡器产生信号,信号检测端提取频率信息以检测信号;对呼叫进程音设计,除了类似双音多频的信号发生及频率检测设计外,还需要检测信号持续时间,作者设计了一种基于匹配状态表的方法以检测信号持续时间。 - Secondly , two carbon fiber reinforced composite beams were fabricated , and their modal frequencies were measured by an experiment method . thirdly , delaminations were modeled by pairs of nodes with the same coordinates but different node numbers , while the modal frequencies of these beams with different delamination location and size were computed by an eas piezoelectric solid element . moreover , a novel method combining computational mechanics and neural network was demonstrated for composite health monitoring ; the first five flexure modal frequencies obtained by fem were modified by a primary revising approach and were used to train the neural network
本文较全面地评述了神经网络的应用模型、改进算法等，编制了bp神经网络程序：制备了纤维增强复合材料试件，并进行实验模态分析；利用坐标相同、节点号不同的方法模拟脱层损伤，基于eas列式的压电固体单元计算了不同脱层损伤情况下的频率信息；针对基于实验数据训练神经网络存在样本不足的缺陷，本文提出了利用有限元方法对含有脱层损伤的复合材料试件进行数值模拟，以前五阶弯曲模态频率构建训练样本的新思路，并提出了一种初步的计算值修正方法，以此构建神经网络的训练样本：将实验模态分析的结果送入训练好的神经网络进行预测，实现了对复合材料梁的脱层损伤的定位和损伤程度的评估。