1) ambiguity function
模糊度函数
1.
In wideband system,ambiguity function of Linear Frequency Modulation(LFM) is coupled in delay and Doppler,and the main ridge of Wideband Ambiguity Function(WAF) is not simple linearity.
在宽带系统中,线性调频信号的模糊度函数不仅在时延和多普勒频移具有耦合性,而且其宽带模糊度函数的脊线已经不是简单的直线,使得进行目标参量估计变得复杂。
2.
In wideband system,ambiguity function of linear frequency modulation(LFM)is coupled in delay and Doppler, and the main ridge of wideband ambiguity function(WAF)is not simple linearity.
在宽带系统中,线性调频信号的模糊度函数不仅在时延和多普勒频移具有耦合性,而且其宽带模糊度函数的脊线已经不是简单的直线,使得进行目标参量估计变得复杂,作者为了提高其估计精度在文献[1]中给出两种修正方法,本文从仿真实验角度来验证修正2方法的有效性,实验结果显示该方法估计高速目标的速度时可提高估计性能。
3.
This paper studies the Ambiguity function of LFM(Linear Frequency modulation signals) as well as its synchronous performance on such bad transmission condition as multi-path effect in water,according to which the computer emulation and lacustrine experiment data both prove that this method is available in the synchronization of acoustic communication.
本文研究了线性调频信号(LFM)的模糊度函数及其在多径效应等水下恶劣传输条件下的同步性能,计算机仿真和湖上实验结果都表明该方法能够实现水声通信的同步。
2) High-order ambiguity function
高阶模糊度函数
1.
To estimate the parameters for linear frequency modulation(LFM) radar signal in the polynomial phase signal(PPS),the high-order ambiguity function(HAF) for suboptimal parameter estimation of PPS is improved based on the proposed spectrum s maximum variance principle.
针对多项式相位信号(PPS)中的线性调频(LFM)雷达信号参数估计,通过提出频谱方差极大值准则对PPS次优参数估计方法高阶模糊度函数(HAF)进行了改进,提出了适于单分量LFM参数估计的改进HAF。
2.
This paper addresses the issue of detection and parameter estimation of multicomponent Polynomial Phase Signals (mc-PPS s) embedded in noise,based on high-order ambiguity function (HAF).
提出了先由对应于不同时间延迟参数的高阶模糊度函数估计出一组相位系数估值 ,然后采取表决方法从该组估值中提取出最终相位系数估值的参量估计方法 。
3) ambiguity function method
模糊度函数法
1.
Based on the principle of attitude determination with single baseline,according to the carrier phase dual differentia mathematic model of attitude determination,in favor of ambiguity function method,the fitness function is established,then the decimal coding genetic search algorithm is designed.
基于单基线的GPS载波相位双差姿态测量模型,利用模糊度函数法,建立起适应度函数,采用十进制编码设计了能够避开整周模糊度的求解而直接搜索解算载体姿态的遗传算法模型。
2.
This paper presented a new initialization method of the real-time GPS attitude determination system,which integrates the solution of the transcend equation and the ambiguity function method(AFM),speeds up the calculation of the initialization.
提出了一种新的实时全球定位系统(GPS)姿态测量初始化方法,将超越方程的求解与模糊度函数法相结合,有效地提高了初始化计算速度。
3.
Combining the genetic algorithm with the ambiguity function method, this paper presents a new approach to perform GPS carrier-phase ambiguity resolution using sing-epoch C/A code and single-epoch L_1 carrier phase observation data.
考虑到遗传算法的全局最优搜索特性,将遗传算法与模糊度函数法相结合,用一个历元的C/A码观测值与单频单历元的L1载波观测值作为基本观测量来确定GPS相位整周模糊度值,从而形成了基于遗传算法的AFM整周模糊度搜索策略。
4) fuzzy membership function
模糊隶属度函数
1.
A new fuzzy membership function is defined in the light of requirements of image thresholding which can overcome the influence on segmentation caused by the classical S function.
算法针对图像阈值化分割的要求构造了一种新的模糊隶属度函数，克服了传统Ｓ－函数带宽对分割效果的影响。
2.
This paper proposes a fuzzy membership function to describe the uncertain status of individuals in the swarm system.
提出一种模糊隶属度函数来对个体的不确定运动状况进行建模,进而提出不确定环境中的群体模型,这种基于模糊概念的建模方法不会无谓地牺牲个体的可运动空间,可尽量减少群体行为建模时对个体邻域内其他个体运动状况的约束强度,而不确定群体模型能保证在不确定环境中实现稳定收敛的群体行为,仿真结果表明,通过对个体的运动位置进行模糊处理,有利于在动态不确定环境中保持稳定的群体行为。
3.
An improved image segmentation method based on maximum fuzzy entropy is proposed in this paper,and the proposed method defines a new fuzzy membership function.
提出了一种改进的模糊熵图像分割算法,该算法定义了一种新的模糊隶属度函数,该模糊隶属度函数只包含一个参数,即所要寻找的最优分割阈值,采用简单的穷举法便可得到最优分割阈值。
5) Fuzzy Measure Function
模糊度量函数
1.
Study of Fuzzy Measure Function Generating Method of Software Quality;
一种软件质量的模糊度量函数生成方法研究
6) Acceleration ambiguity function
加速度模糊函数
补充资料：几何学模糊度
几何学模糊度
放射学术语。由X线管有效焦点大小，即由几何投影因素所产生的照片模拟、影像边界的不锐利程度，又称半影。几何学模糊度(Hf)是X线成像技术中影像模糊的最主要成因。几何模糊度与有效焦点(F)成正比，与物-片距(c)成正比，与靶-物距成反比。若用公式表示，几何学模糊度的值为：Hｆ=〓〓ｃ〓〓ｂ-ｃ〓〓F(b代表靶-片距)。焦点的大小对产生影像半影的关系很大，用小焦点或微焦点可提高照片的清晰度。例如，放大摄影时C值增加，若用小焦点X线管投照则可弥补由于物-片距增加而增加的几何学模糊度。
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