1) threshold of reflected ultrasonic wave

回波阈值
1.
indicated that the key problem of this system in the process of implementation,that is ascertaining the threshold of reflected ultrasonic wave and imple- mentation of multi-functional system.
指出了该系统实现中的关键问题,即回波阈值的确定和系统多功能化的实现。
2) Comeback threshold

回归阈值
3) wavelet threshold

小波阈值
1.
Application of wavelet threshold denoising method in the fluorescence analysis of pesticides;
小波阈值去噪法在农药荧光分析中的应用
2.
Analysis of selection rules of wavelet threshold in gravitational abnormal data processing;
海洋重力异常数据处理中小波阈值选择规则分析
3.
Imaging restoration for sparse aperture optical systems based on wavelet threshold and Wiener filtering;
基于小波阈值法和维纳滤波的稀疏孔径光学系统成像的恢复
4) wavelet transformation(WT)

滤波阈值
5) wavelet thresholding

小波阈值
1.
A new speech enhancement method based on multitaper spectrum method and wavelet thresholding is proposed so that a noisy speech power spectrum is obtained.
提出了基于多窗谱法和小波阈值法对带噪语音的短时功率谱进行估计的语音增强改进方法。
2.
It also analyzes for four models how the bias and variance of the multitaper spectrum are affected by the tapers number and estimation noise removal via wavelet thresholding,and further compares them with those of periodograms.
以四种信号模型为例,分析了窗口数和小波阈值法去除估计噪声对多正弦窗谱估计的偏差和方差的影响,并与周期谱图进行了比较。
3.
In theory of estimation with wavelet thresholding, the threshold adapting data can be cal- culated by minimum estimation of risk to improve the SNR of estimation.
根据小波阈值估计理论,通过最小化风险的估计,可计算自适应于数据的阈值,提高估计的信噪比。
6) threshold filter

阈值滤波
1.
In the paper,wavelet threshold filter algorithm is applied to gaseous infrared spectra analysis.
将小波阈值滤波算法应用于气体红外光谱分析中,以实际测量得到的气体透过率光谱为处理对象,首先完成了单组分测量光谱的小波去噪;其次,实现了多组分实测光谱的小波去噪与定量分析;最终可以获得气体浓度等重要的光谱分析结果。
2.
In chapter three, firstly, the principles of wavelet analysis and threshold filter are introduced.
主要概述了多分辨率分析、Mallat算法和该算法初始系数的计算以及阈值滤波时小波系数的估计方法和阈值的选择。
补充资料:地理阈值
亦称地理临界值。它将地理系统中的不同状态加以分隔与区分,把某一性质的表现范围加以限制和说明。在此种意义上,地理阈值代表了系统的“状态空间”的非连续性。在一般叙述中,常把地理阈值等同于地理系统边界条件,但二者是有区别的:如果两种不同的状态同时存在于相同的边界条件之中时,地理阈值的表现可能是“非传递性”的转移;而当两种不同状态分置于不同的边界条件之中时,地理阈值的表现可能是“过渡性”地转移。无论是非传递性转移的地理阈值,还是过渡性转移的地理阈值,都使地理系统中不可能具备唯一的、通用的或稳定的解。所谓“解”都是有条件的,都是在地理阈值约束下的解。
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