spectrum n. (pl. -tra ) 1.【物理學(xué)】譜,光譜;波譜;能譜,質(zhì)譜。 2.【無線電】射頻頻譜;無線電(信號)頻譜。 3.【心理學(xué)】(眼睛的)余像;殘像。 4.〔轉(zhuǎn)義〕范圍,幅度;(連續(xù)的)系列。 an absorption spectrum 吸收(光)譜。 a bright line spectrum 線狀光譜。 an optical spectrum 光譜。 a solar spectrum 太陽光譜。 a wide spectrum of opinion 意見的不同幅度甚大。
function n. 1.功能,官能,機(jī)能,作用。 2.〔常 pl.〕職務(wù),職責(zé)。 3.慶祝儀式;(盛大的)集會,宴會。 4.【數(shù)學(xué)】函數(shù);與其他因素有密切關(guān)系的事。 The function of the ear is to listen. 耳的功能是聽。 the function of education 教育的功能。 discharge one's functions 盡職。 the functions and powers of the National Congress 全國代表大會的職權(quán)。 a controllable function【火箭】遙控程序。 public [social] function招待會,文娛晚會,社交集會。 vital functions 生命機(jī)能。 vi. (器官等)活動,(機(jī)器等)運(yùn)行,發(fā)揮作用。 function as teacher 擔(dān)任教師。 a sofa functioning as a bed 兼當(dāng)床用的沙發(fā)。 The lathe doesn't function well. 這臺車床有毛病。 function digit [letter] 【計算機(jī)】操作數(shù)碼[字碼]。
function of function迭函數(shù); function合成函數(shù); 元函數(shù)
Spread - spectrum function of spread - spectrum communication system 擴(kuò)頻通信中的擴(kuò)頻函數(shù)
A filter whose transfer function is matched with the frequency spectrum function of input signal 其傳遞函數(shù)與輸入信號的頻譜函數(shù)相匹配的一種濾波器。
And we utilize the relation of spectrum function and correlation function to give the way of estimating doppler spread width 進(jìn)而通過matlab建立模型,驗證了此方法,并對其中的幾個參數(shù)進(jìn)行了分析和討論。
For focus measures , frequency spectrum functions , gradient functions and entropy function are analyzed in detail 其次,本文從頻譜函數(shù)、梯度函數(shù)、熵函數(shù)等方面詳細(xì)分析了對焦深度法中常用的對焦評價函數(shù)。
We revised frequency spectrum functions by using weighting factor - the distance between direct component and alternating component , and improved the acuity of focus measure curve 提出用交流分量到直流分量的距離作為加權(quán)因子對頻譜評價函數(shù)進(jìn)行改進(jìn),有效地提高了對焦評價曲線的靈敏度。
( 3 ) . the flattening arithmetic of an edfa was presented based on the inter - correlative function between the gain spectrum function of the edfa and that of the reserve transmission spectrum of the lpfg . for optimal matching between the two spectra , the flattening arithmetic calculates the variation of the resonant amplitude and wavelength of the lpfg Iii .提出了一種動態(tài)增益均衡的平坦算法,這種算法的本質(zhì)就是利用摻鉺光纖放大器增益譜函數(shù)和新型長周期光纖光柵的透射譜反轉(zhuǎn)譜函數(shù)的相關(guān)性,給出新型長周期光纖光柵諧振峰幅度和位置的調(diào)節(jié)量,使改變后的新型長周期光纖光柵的反轉(zhuǎn)譜線能和edfa的增益輸出譜線進(jìn)行最佳匹配。