1) 2-D power spectrum moment
二维谱矩
2) 2-D third-order time-average moment spectrum
二维三阶时间平均矩谱
1.
According to the properties that 2-D third-order time-average moment spectrum has the peak value at the coupling frequencies of harmonics when the 2-D harmonics only exists the quadratic nonlinear coupled harmonics,the Genetic Algorithm(GA) is employed to analyze the quadra.
利用当且仅当二维谐波中存在二次非线性耦合谐波时,所定义的二维三阶时间平均矩谱仅在参与二次耦合谐波频率处取得极值的性质,提出了采用遗传算法来分析二维谐波的:二次非线性耦合问题的算法。
3) 2D NMR
二维NMR谱
1.
The structures were determined by 1D and 2D NMR techniques.
运用~H、~(13)C NMR谱、APT谱及各种二维NMR谱,结合其它理化数据,首次确定了它们的化学结构,分别命名为崖椒内醐和乙酯氧崖椒内酯。
4) two-dimension spectrum entropy
二维谱熵
1.
With two-dimension spectrum entropy indexes being selected as character indexes in feature abstraction of defect, the seamless tube flaws were recognized by the improved fuzzy adaptive Hamming NN(Neural Networks) algorithm.
作者研究了无缝钢管内伤、外伤及孔洞等缺陷信号的频域特征,提取信号二维谱熵指标作为特征指标,运用改进的模糊Hamming神经网络识别方法,对无缝钢管的缺陷进行识别。
2.
Then, inputting the two-dimension spectrum entropy into the SVM classification, the result shows that SVM has fine compute efficiency and classified ability.
进一步将二维谱熵作为支持向量机(SVM)分类器的输入量,结果表明SVM具有良好的分类能力和计算效率,可以满足在线监测的要求。
补充资料:耒阳令曾君寄禾谱农器谱二书求诗
【诗文】:
欧阳公谱西都花,蔡公亦记北苑茶,农功最大置不录,如弃六艺崇百家。
曾侯奋笔谱多稼,儋州读罢深咨嗟。
一篇秧马传海内,农器名数方萌芽。
令君继之笔何健,古今一一辨等差。
我今八十归抱耒,两编入手喜莫涯。
神农之学未可废,坐使末俗惭浮华。
【注释】:
【出处】:
欧阳公谱西都花,蔡公亦记北苑茶,农功最大置不录,如弃六艺崇百家。
曾侯奋笔谱多稼,儋州读罢深咨嗟。
一篇秧马传海内,农器名数方萌芽。
令君继之笔何健,古今一一辨等差。
我今八十归抱耒,两编入手喜莫涯。
神农之学未可废,坐使末俗惭浮华。
【注释】:
【出处】:
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