查询词典 chirp

But, in the natural and artificial signal, a lot of signal phases don\'tvary linearly with time, for example, we usually use chirp signal in the radar technology,frequency step signal, linear modulation component of the ground echo in the SARtechnology, linear modulation component of the moving target echo, linear modulationcomponent while the airborn radar detecting the moving target, etc.

在自然界和人工信号中，许多信号的相位变化并不是随时间一次方变化，如雷达技术中常用的线性调频信号，频率步进信号，另外，SAR 技术中，地面回波所含有的线性调频分量，ISAR技术中，运动目标的回波所含有的线性调频分量，机载雷达探测运动目标时的线性调频分量，等等；傅里叶变换对此类信号分析所得的结果是信号在不同频率点上的能量分布，即信号在基函数上的投影。

Of Long of chirp Υ of ∠ of violet alkyne fan, put forward " expand with consolidate the task of the Red Army "; 2 it is to emphasize " the lifeline that political job is a Red Army " important principle; 3 it is to establish the Red Army man is normal the school,; of talent of cadre of education Red Army 4 it is to improve martial technology, take a place seriously to arm.

中华全国苏维埃第一次代表大会召开后，红军建设开始了一个新的阶段：首先采取相应措施，提出"扩大与巩固红军的任务"；二是强调"政治工作是红军的生命线"的重要原则；三是创办红军正规学校，培养红军干部人才；四是提高军事技术，重视地方武装。

When the chirped pulse with area smaller than propagates in the medium, splitting doesn't occur and the chirped pulse evolves gradually to an approximate normal Gaussian pulse (C=0), and this characteristic doesn't vary when the chirp coefficient; however, variation of the chirp coefficient will change amplitude and group velocity of the pulse.

面积小于的啁啾脉冲，在介质中传播时不发生分裂，且啁啾脉冲逐渐演化为一个近似的无啁啾(C=0)脉冲，这一特点不随啁啾系数的改变而改变；但啁啾系数的变化将改变脉冲的振幅和群速度。

Goes based on the connected domain image chirp is through carries on to the image corrosion and the inflation has the choice to go chirp.

基于数学形态学的图像去除噪声是通过对图像的开、闭操作有选择的去噪。

This month Boyun the chirp sends out diphthong, this time we duplicate him "the chirp" to make the response, and "converses" with lip shape must obviously and her.

这个月的柏妘会咿咿啊啊地发出双元音，此时我们多重复他的「咿咿啊啊」去做回应，并且用唇形要明显地和她「对话」。

It′s found that the GVD-caused chirp in the exponential type of DDF is least likely to be affected by the initial chirp,the GVD-caused chirp in exponential, linear,Logarithm and Guassian types of DDF has the synchronous character of saturation as the nonlinear-effect-caused chirp ,and the two kinds of chirp are found to counteract to balance, which makes the sum chirp tend to be zero.

发现指数型色散缓变光纤中初始啁啾对GVD所致啁啾的影响最小，在指数型、线型、对数型和高斯型色散缓变光纤中GVD所致啁啾具有同非线性效应所致啁啾相似的饱和性，二者相消，使净啁啾趋于零。

We compare the effect of eliminating the chirp by means of linearly chirp fiber Bragg grating, normal dispersion fiber and F-P cavity.

因此我们认为光纤光栅消啁啾是消除脉冲中心部分的啁啾，脉冲前后沿啁啾消除情况，决定于啁啾的类型。

As an example of the Gaussian pulse and soliton,the effect of quintic nonlinearity on the chirp was found to depend on the initial chirp,the fiber loss,and the peak power of the light field.

而现在诸多学者研究的热点课题之一的光孤子通信，由于其绝热保形的传输特性，为将来实现高速率、远距离的通讯提供了新的手段[1]。

Nasutus lasts 4.5 ms,consisting of 4 pulse-strings with an inter-chirp interval of 1.8 ms,and the frequency of highest power peak is about 11.37 kHz. The chirp of the songs of E.

鼻优草螽鸣声的每个脉冲组由4个脉冲串构成，脉冲组持续时间4.5 ms，脉冲组间隔为1.8 ms，主能峰频率为11.37 kHz。

For chirp radiator direction-finding using an ARM interferometer seeker, the cause of the direction-finding error using traditional direction angle estimation is studied, and the relationship between the direction-finding error and the integration time is analyzed, especially for the boundary condition that the integration time of phase discriminators gets the maximum value.

针对ARM干涉仪导引头对chirp信号辐射源的测角问题，从几何关系与信号分析两方面揭示了传统方向角估计方法产生测角误差的机理，分析了干涉仪测角误差随鉴相器积分时间变化的关系，重点对积分时间最长这一极端情况开展研究。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。