分段

To compensate for nonlinear distortion of RF power amplifiers, a novel adaptive digital predistortion method based on piecewise polynomial was proposed, and multiple lower-odd-order-only polynomials in the form of orthogonal coordinates were used for predistorter design.

为补偿RF功率放大器的非线性失真，提出一种新的基于分段多项式的自适应数字预失真方法，使用多个直角坐标形式的低阶奇次多项式设计预失真器。

Based on the interference characteristic, the sidelobe cancellation in time is presented and the procedure is designed, which achieves good results that the detection distances of OSMAR is increased by over 40km. At last the dissertation summarizes the application of beamforming in HFSWR, its effect and defects. 5 The dissertation discusses the application of orthogonal expansion method in HFSWR. At first, the traditional OE algorithm is introduced, and the output form is concluded. Then the dissertation discusses the influence of OE method on target signal.

首先介绍了阵列天线的方向图，接着阐述了波束形成的基本原理，然后引入了自适应波束的概念，讨论了确定权函数的准则，介绍了自适应波束形成在高频地波探海雷达中的应用和兼顾目标信号的波束形成；重点介绍了自适应旁瓣对消的原理和权系数计算方法，结合高频地波探海雷达数据特点，设计了在频域用旁瓣对消法消除射频干扰的处理过程，给出了处理结果，并对其效果进行分析，进而提出在时域进行分段旁瓣对消的新方法，设计了处理流程和计算方法，然后给出处理结果，该方法能提高OSMAR探测距离40km以上。

It is shown that the pressure distribution is a piecewise parabolic curve, and the pressure gradient can be discontinuous at the border of the slip and no-slip regions.

结果显示压力分布为分段光滑的抛物线，在滑移／非滑移边界，存在不连续的压力梯度。

It is not only a new way to investigate the functional changes of brain, but also being able to overcome the disadvantage of BEAM for mapping EEG on partial spectra changing. Several BIM graphies of a partial epilepsy patient are calculated.

该方法不仅是从新的角度观察大脑功能变化，而且可克服传统的脑电频谱分段地形图不能表达长程脑电模式变化的不足。

Bifurcation and chaos of periodic motion s of a single-degree-of-freedom system with piecewise-linearity is studied.

研究了一类单自由度分段线性系统周期运动的分岔和混沌现象。

In this paper, the existence of the periodic solution for two classes of piecewise symmetric systems is studied, and the certain sufficient conditions for the existence of the corresponding systems are obtained.

本文研究了两类分段对称系统周期解的存在性，得到了系统相应的周期解存在的充分条件。

As an application, the existence of the periodic solution for a class of delay differential equations with piecewise sysmmetric condition is proved.

作为应用，证明了一类具有分段对称性的时滞微分方程的周期解的存在性，推广了现有的相关结果。

A novel algorithm for InSAR SLC coregistration is proposed. The averaged periodogram is used as evaluation function of registration in the new algorithm and the estimation variance of evaluation function is reduced by separating the data into numbers of subsections and averaging them, thus the accuracy and reliability of registration is improved.

提出了一种新的干涉合成孔径雷达复图像配准算法，新算法使用干涉相位图的平均周期图作为配准的评价测度函数，采用数据分段求平均的方法降低了评价函数的估计方差，从而提高了配准的精度与可靠性。

By means of shimming,the filed integral and phase error can be reduced as much as possible.

磁场的垫补和测量方法由原来的整体测量改为分段进行，垫补的使用使各段积分场及位相误差都尽可能小。

In Chapter 2, by using a class of piecewise continuous Lyapunov function and the method of analysis, we study existence, uniqueness and stability of impulsive Volterra intergro-differential equations.

在第二章中，主要利用分析技巧和分段Lyapunov函数等方法，讨论了含脉冲的Volterra积分微分方程解的存在性和其零解稳定性的充分或必要条件。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。