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    On the Integration of Nonlinear Operators
    关于非线性运算的积分
    S-box is the unique nonlinear operation for advanced encryption standard(AES) and affects the capability of the algorithm.
    S盒作为AES算法惟一的非线性运算,直接决定算法的性能。
    Based on the conventional Log-MAP algorithm for Turbo-codes decoding and the existed algorithm for simplifying Log-MAP, an improved one is presented in this paper.
    本文在传统的Turbo码译码算法Log-MAP算法的基础上,分析了一种已有的简化Log-MAP算法中非线性运算以利于硬件实现的方法,并提出了一种改进的Log-MAP译码算法。
    The basic structure of turbo codes and principle of Log-MAP algorithm of the turbo codes are introduced. The problem related to the simplification of the Log-MAP algorithm and three methods of simplified nonlinear operation of Log-MAP algorithm:Max-Log-MAP algorithm,Lookup-Log-MAP algorithm,Linear-Log-MAP algorithm are further discussed and analyzed,Finally,the performances of these methods are compared through the simulation of MATLAB.
    介绍了Turbo码基本结构,阐述了Log-MAP算法的译码机理,在此基础上就简化Log-MAP算法作了探讨,分析了三种简化Log-MAP算法中非线性运算以利于硬件实现的方法:Max-Log-MAP算法,Loo-kup-Log-MAP算法,Linear-Log-MAP算法. 最后通过仿真对它们进行了性能上的模拟和比较.
    Two remarks on Non-linear operators
    非线性运算子的两点注记
    The algorithm avoids non-linearity operations relevant to the conventional algorithm during the solutions, and in theory error of computation is zero.
    该算法避免了常规算法在求解过程中所涉及非线性运算,并且理论计算误差为 0。
    Besides conventional timing recovery method, in order to solve the timing recovery question of likely the partial responses signal, we propose the method of using the higher nonlinear operation to obtain the timing recovery information.
    除了常规的定时恢复方法外,为了解决像部分响应信号这样的频谱受限信号的定时恢复问题,本章提出了采用高次非线性运算来得到定时恢复信息的方法。
    how to find a efficient method to treatmentnonlinear operators of PDEs is very important.
    因此找到一个有效的方法来处理偏微分方程中的非线性运算问题是十分重要的。
    Based on the arithmetic theory of fix DSP, we accomplish the feature extracting arithmetic using zero-crossing and wavelet package analyses, and solve the nonlinear problem when replanting BP arithmetic to DSP, in order to insure the real time demand of system.
    结合定点DSP算法的实现原理,完成了基于过零分析和小波包分析的特征提取算法的定点DSP编程,并解决了BP神经网络分类识别算法向定点DSP移植时存在的非线性运算问题,提高了算法代码的执行效率,保证了系统的实时性要求。
    Introducing some nonlinear transform,such as quadratic wavetransform,before performing the K-L filtering can improve the filtering procedure, which cansuppress very strong noise while keeps signal clear without serious distortion.
    引入二次波场等非线性运算方法可以进一步改进K-L滤波方法,使其在资料信噪比很低时,仍然能压制噪音成分,保持反射地震信号不受明显畸变。
    This paper presents the principle of doppler beam sharpening(DBS) imaging and the characteristic of TMS320C6201 Then, the implementation of DBS imaging algorithm based on general DSP is described in detail, in which the characteristic of general DSP and the effect of memory I/O operation are taken into account In the end the performances are analyzed and experiment results presented
    在简要介绍多普勒波束锐化 (DBS)成像原理和TMS32 0C6 2 0 1芯片特点的基础上 ,着重讨论了DBS成像算法基于DSP的实现。 在实现过程中充分考虑了通用DSP完成非线性运算、除法运算耗时大以及存贮I/O操作耗时不能忽略等特点。
    A grayscale morphology filter is a kind of nonlinear operation with signal shape. The pretreatment based on a grayscale morphology filter can effectively restrain the background disturb and yawp in the picture.
    灰度形态滤波是一种结合信号形状的非线性运算,基于灰度形态滤波的预处理可有效地抑制图像中的背景干扰和噪声.
 

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