瞬時提前點 的英文怎麼說
中文拼音 [shùnshídīqiándiǎn]
瞬時提前點
英文
momentary predicted point- 瞬 : Ⅰ名詞（眼珠一動; 一眨眼） wink; twinkling Ⅱ動詞（眨眼） wink
- 時 : shí］Ⅰ名1 （比較長的一段時間）time; times; days:當時at that time; in those days; 古時 ancient tim...
- 提 : 提動詞（垂手拿著） carry （in one's hand with the arm down）
- 前 : Ⅰ名詞1 （在正面的） front 2 （次序在先的） first; top 3 （過去的; 較早的） ago; before; preceding...
- 點 : Ⅰ名詞1 （液體的小滴） drop （of liquid） 2 （細小的痕跡） spot; dot; speck 3 （漢字的筆畫「、」）...
- 提前 : 1 （往前移） shift to an earlier date; move up （a date）; bring forward; advance 2 （事先） in a...
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The working principle of pulsed eddy current ( pec ) nondestructive testing technology is analyzed, the pec testing system was been established to examined the specimen of multi - layered aircraft structure, peak and zero - crossing time of the time domain transient response signal of pec are extracted as the features to detect the corrosion in the second layer of aircraft structure quantificationally, the experiment results are consistent with that of the theory analysis, as the pec have the advantages of fast speed and quantification, this makes the method have the broad using foreground in the testing of aircraft structure corrosion
摘要對脈沖渦流無損檢測技術的工作原理進行了分析，建立了脈沖渦流的檢測系統對加工的模擬飛機多層結構的試件進行了測試，提取其時域瞬態感應信號的峰值和過零時間作為特徵量，對出現在飛機多層結構第二層中的腐蝕缺陷進行了定量檢測，試驗結果和理論分析相一致，證明了脈沖渦流檢測方法的有效性，由於其具有快速和定量化的優點因而在飛機結構的腐蝕檢測中具有廣闊的應用前景。Digital receiver and its forepart operational principle are discussed, then methods of instantaneous autorelation, short - time fourier transform, wigner distribution and wavelet analysis are introduced in detail. the advantages and disadvantages and the application range of these algorithms are given. based on the merits of these algorithms, a new method for signal modulation type analysis is presented
本文討論了數字接收機以及前端的工作過程，然後詳細闡述了瞬時自相關、短時傅立葉變換、 wd演算法、過零檢測和小波分析等各種演算法在脈內調制分析上的應用，分析了各演算法的優缺點，提出一種并行處理模式：即針對不同的信號採用不同的演算法對脈內調制信號進行分析。The surface - wave theory was firstly provided by rayleigh, which can be used in even medium and many other learners developed rayleigh ' s theory and provided another theory which can be used in layered medium
瞬態面波法的理論基礎是英國學者瑞利提出的半無限彈性均勻介質中的瑞利面波理論及其後來發展起來的半無限彈性層狀介質中的頻散理論，因其具有同時可以大范圍檢測，精度好、效率高等優點，在無損檢測方面有很好的前景。
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