特征函数

Instantaneous frequency is function of time that gives sharp identification of imbedded structures in signal.

由于瞬时频率是时间的函数，因此可以获得信号任意时刻的频率分布，利用瞬时频率的局部化特征可以有效地揭示信号的内在结构。

By the implicit function theorem,the continuation of the eigenvalues depending on the parameters of the system can be established,except...

依据多元向量值函数连续性，建立对特征值的排列算法，给出系统特征根轨迹的正确曲线，再输出V-g和V-f图数据，从而避免"窜支"现象。

In the meantime,impulse response function and variance decompositions are used to research dynamic response feature.

同时，利用正交脉冲响应函数和方差分解分析了电力消费与影响因素的动态响应特征。

In this paper, the mathematical relations of these distributions and some features in earthquake sequence are studied.

同时 ，对工程地震和地震预报中常见的危险函数所反映的地震特征作了分析。

Because this algorithm has some better performance to reconstruct the incident wavefront, and refers to the nonlinear responses of the influence function, a new solution to correct the wavefront aberration by the CMDM is found.

结果表明，基于模拟退火的波前模式复原算法具有良好的波前复原性能，并且可结合影响函数的非线性特征描述，为连续膜波前复原控制问题提供一种新的解决途径。

The results show that the ratio of the released elastic energy to the damage dissipative energy can be served as a sensitive precursor of catastrophe. Furthermore the value of the non-dimensional ratio has a similar tendency to be 1 with different responses in the two failure modes, that is, the response function R always decreases in the gradual mode, while increases and tends to be infinite at the catastrophic point of the failure.

研究发现在灾变性破坏和非灾变性的渐进式破坏两种失效模式中，虽然系统中卸载所贡献的弹性能增量与损伤消耗和释放的能量增量的比值都有趋向于1的趋势，但是两者的趋近方式不同：灾变性破坏时表征能量比随控制变量变化特征的响应函数R有一个上升段，在灾变破坏点$R$趋向于无穷大，而非灾变性破坏中$R$始终是减小的。

The main ideas are as follows. 1. To estimate instantaneous speed and angle position when angular sampling can not used, some methods have been analyzed firstly.

为此，本文分别采用计算阶比分析、广义多相干分析和径向基函数网络等方法，来解决旋转机械变速过程中的信号预处理、特征提取和烈度监测等问题。

It expands Lebesgue characteristic of integrable function of Riemann through the definition of gather zero measure and builds up the theory of many integral calculus.

通过定义多维零测度集将可积函数的特征扩展到多维情形，同样统一了多维情形的充分条件，建立了多维情形的可积性理论。

This article uses the Fractal and Lyapunov-Bxponent to analyze and discuss the Iterated Function System. Some fractal pictures were drawn using Matlab.

本文利用分形维和李雅普诺夫特征指数对迭代函数系统进行了分析和探讨，并利用Matlab绘制了一些分形图形。

The principles are as follows:①preliminary interpretation is carried out on crosswell seismic data in depth domain to establish an accurate velocity model;②sinc interpolating function is used in depth-time conversion to realize waveform fidelity;③the recognition of surface seismic data is utilized to ascertain the reflection characteristics of crosswell seismic data in time domain;④ good spatial continuity of surface seismic data is adopted to retrieve the "hopper" defect in crosswell seismic profiles and the deficiency of lateral contrast between crosswell seismic data;⑤in fine calibration of well-side traces of crosswells and surface seismic data, coincident time-depth relation is used to match two seismic data so as to make the calibration more reasonable;⑥in multi-crosswell seismic data inversion by sparse spike inversion method, lateral restraints are strengthened to ensure the continuity of inversed wave impedance profile.

实现反演的基本原理是：对深度域井间地震资料进行初步解释；建立精确的速度模型；在对井间地震剖面进行深时转换时采用sinc插值函数实现波形保真；利用对地面地震资料的认识来落实时间域井间地震资料的反射特征；利用地面地震资料良好的空间连续性弥补井间地震剖面的"漏斗"缺陷和井间资料之间横向对比性的不足；在井间地震和地面地震井旁道精细标定中，通过一致的时深关系来实现两种地震资料之间的匹配，使井旁道的标定更加合理；在利用稀疏脉冲反演方法进行连井井间地震资料反演时，通过增强横向约束保证反演波阻抗剖面的连续性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。