合弦

但却不记得帮我写的三个合弦。

But you can 't remember three cords you wrote for me .

基于振动响应的耦合弦系统损伤检测

Damage Detection in Coupled String System by Measured Dynamic Responses

弦乐合弦声信号时频特征的小波包分析

Analysis of Time-frequency Domain Characteristics of String Music Chord Sound Based on Wavelet Packet Technique

明月竹箫与华堂合弦&从中西传统绘画看中西艺术之不同

Different Art Between Chinese-Western Traditional Painting Art

他们给我观合弦曲谱，那真是，真是太有趣了。

They gave me the chord charts , and it was really , it was really fun .

为解决具有相近频率和相重频率特征的多跨耦合弦系统的损伤检测问题，建立了耦合弦系统在外激励作用下的有限元运动方程。

Aiming at the damage detection for coupled string system with close and repeated natural frequencies , finite element method is chosen to analyze forced vibration of the coupled string system .

与传统傅里叶谱分析技术相比较，小波变换的时频相平面图能同时反映合弦声信号的构成频率成分及其时域特征。

Compared with the traditional Fourier Transform , the wavelet time-frequency images , which reflects time & frequency characteristics of signals simultaneously , are more suitable for analyzing signals with time variant characteristics .