- 脈沖波譜
- 脈沖頻譜
- 脈沖譜
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pulse spectrum中文什么意思
例句與用法
- Then the effect is to steepen the flanks of the pulse spectrum .
因此在效果上是加大了脈沖譜翼部的陡度。 - Numerical examples illustrated the spatiotemporal properties such as spectrum redshifting , narrowing and pulse distortion , etc . it is stressed that the " antibeam " behavior of ultrashort pulsed beams can be avoided , if a suitable truncation function is introduced to the initial pulse spectrum
數(shù)值計(jì)算例說明了在色散介質(zhì)中會(huì)出現(xiàn)譜紅移、變窄、及脈沖形變等傳輸效應(yīng)，而且對(duì)初始光譜引入截?cái)嗪瘮?shù)可以避免“非光束”行為。 - Especially , in the solution of pulse spectrum , the negative frequency form of nls equation should be solved by the negative frequency form of fourier transformation , while the positive frequency form of nls equation is solved by the positive frequency form of fourier transformation
尤其在脈沖頻譜的求解問題中，如果采用負(fù)頻形式的非線性薛定諤方程則必須選取負(fù)頻形式的傅里葉變換；如果采用正頻形式的非線性薛定諤方程則必須選取正頻形式的傅里葉變換。 - A technique for identifying total parameters ( titp ) is employed in the inverse problem of heat and moisture migration research in porous structures , accordingly the basic principle and implementary approach is presented to obtain the temperature and humidity dependent thermal and humid physical parameters . it is indicated theoretically that the applications of pulse spectrum technique ( pst ) to the inverse problem are feasible
在多孔結(jié)構(gòu)內(nèi)熱濕遷移反問題研究中引入全參數(shù)辨識(shí)方法，提出了求解溫度和濕度依賴型熱濕遷移物性參數(shù)的基本思想和途徑，從理論上指出了應(yīng)用脈沖譜技術(shù)研究多層多孔結(jié)構(gòu)熱濕遷移反問題的可行性。 - High - frequency link power converters are receiving increasing attention . when the input frequency of ac - ac converter is quite high , such as 20khz or above , in order to make sure the converter switching action is restricted to the zero crossing point of the link voltage , the switching cycle becomes discrete pulse spectrums , however , the conventional pwm converters are ruled out because they would fail either to the efficiency or the low - distortion criteria
當(dāng)交-交變頻器的輸入頻率非常高，通常為20khz時(shí)，為了在零電壓條件下實(shí)現(xiàn)逆變器開關(guān)管的通斷，變換器的開關(guān)時(shí)刻必須選擇在高頻交流電壓脈沖為零時(shí)，這意味著變換器開關(guān)時(shí)刻在時(shí)間軸上成為不連續(xù)的點(diǎn)，而常規(guī)的硬開關(guān)pwm變換器是將開關(guān)時(shí)刻選擇在任意時(shí)刻。