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"difference" in Chinese : n. 1.差異，差別。 2.不和，爭(zhēng)論。 3.【數(shù)學(xué)】差 ...
"observation" in Chinese : n. 1.觀察，注意；觀察力；?望。 2.觀測(cè)，實(shí)測(cè)；【 ...
"single difference phase observation" in Chinese : 單差相位觀測(cè)
"triple difference phase observation" in Chinese : 三差相位觀測(cè)
"observation" in Chinese : n. 1.觀察，注意；觀察力；?望。 2.觀測(cè)，實(shí)測(cè)；【航?！繙y(cè)天；【軍事】 ...
"difference" in Chinese : n. 1.差異，差別。 2.不和，爭(zhēng)論。 3.【數(shù)學(xué)】差，差額。 4.【邏輯 ...
"difference in" in Chinese : 在……方面的差別
"no difference" in Chinese : 忘絕境界
"the difference" in Chinese : 差別; 老師改變了男孩的人生; 區(qū)別
"there is no difference" in Chinese : 沒(méi)有差別
"difference-in-difference" in Chinese : 倍差法
"oblique observation, tilt observation" in Chinese : 傾斜觀測(cè)
"difference limen difference test" in Chinese : 強(qiáng)度辯差閾差異試驗(yàn)
"abnormal observation" in Chinese : 反常觀察值
"accidental observation" in Chinese : 偶然發(fā)現(xiàn)

The difference of base function cause the difference of observation angle and observation method for signal , this is the essence of wavelet transfer differentiate fourier transfer f short - time fourier transfer , comparing performance and characteristic of various wavelet base functions in common use in fault diagnosis and studying inner connection of different fault diagnosis signal and various wavelet base functions , it is pointed out that genuine optimum wavelet transfer is that signal decompose of base function should be most close to and be most suited to signal feature
基函數(shù)的不同導(dǎo)致對(duì)信號(hào)觀測(cè)角度和觀測(cè)方法的不同，這是fourier變換、短時(shí)fourier變換和小波變換的本質(zhì)區(qū)別。通過(guò)比較故障診斷中常用的各種小波基函數(shù)的性能和特點(diǎn)，研究不同的故障信號(hào)特征與各種小波基函數(shù)的內(nèi)在聯(lián)系，指出真正的最優(yōu)小波變換應(yīng)該是根據(jù)信號(hào)特征與其最近似、最匹配的基函數(shù)的信號(hào)分解。