1) Tiao Xiankou
调弦口
1.
In the meantime,the Tiaoguan bend where Tiao Xiankou is located is excessively curved,the river regime is not smooth,the head of protrusive rocks of the Tiaoguan is very outward,releasing flood discharge is not effective,so the flood control situation is very severely and there is not good for the navigation.
调弦口1959年建闸控制后,闸前淤积严重,冬春季节,已无法从长江直接引水,其下游华容河的河道功能丧失,水环境恶化,已严重影响该地区的工农业生产和居民生活;调弦口所在的调关弯道过度弯曲,调关矶头十分突出,挑流作用强烈,泄洪不畅,对船舶航行也极为不利。
2) Jew's harp
口弦
4) mouth organ
口弦琴
5) sine FM
正弦调频
1.
Performance research on anti-noise FM jamming of pseudo-random code phase modulation and sine FM combined fuze
伪码调相与正弦调频复合引信抗噪声调频干扰性能研究
2.
The purpose of this paper is to research the anti-noise AM spot jamming performance of pseudo-random binary code phase modulation and sine FM(PRBC-SFM) combined fuze based on the criterion of signal to jamming ratio(SJR) gain.
以信干比增益作为衡量标准来研究伪码调相与正弦调频(PRBC-SFM)复合引信抗瞄准式噪声调幅干扰性能。
3.
The spectral correlation function(SCF) of the reconnaissance signal combined sine FM and interpulse pseudo-random code PM was deduced.
推导了正弦调频和脉间伪码调相复合体制信号的谱相关函数(SCF),基于谱相关特征给出了对该复合体制侦察信号的自动识别算法。
6) Sinusoid frequency modulation
正弦调频
1.
,sinusoid frequency modulation and linear frequency modulation signals,the simulation result shows that the characteristic of frequency modulated can be extracted effectively in SNR=5dB.
研究了FM-AM转换时频分析的理论及其实现方法,利用高斯滤波器设计了调频信号的调制特征分析滤波器组,并以正弦调频和线性调频两类调频信号为例进行了数字解调分析,仿真结果表明,在信噪比为5dB时,利用FM-AM转换时频分析技术,可以有效提取调频信号的特征信息。
2.
As example,the digital demodulation is done to two special signals as example,sinusoid frequency modulation and linear modulation frequency signals.
研究了FM-AM转换时频分析的理论及其实现方法,利用高斯滤波器设计了调频信号的调制特征分析滤波器组,并以正弦调频和线性调频两类调频信号为例,进行了数字解调分析。
补充资料：调弦
1.弹奏弦乐器。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条