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。
matrix n. (pl. matrices 或matrixes) 1.【解剖學(xué)】子宮;母體;發(fā)源地,策源地,搖籃;【生物學(xué)】襯質(zhì)細(xì)胞;間質(zhì);基質(zhì);母質(zhì)。 2. 【礦物】母巖;脈石;【冶金】基體;【地質(zhì)學(xué);地理學(xué)】脈石;填質(zhì);雜礦石。 3. 【印刷】字模;型版,紙型;鑄型,陰模。 4.【陣】(矩)陣,方陣;母式;【物理學(xué)】間架;【無線電】矩陣變換電路。 5.【染】原色〔紅黃藍(lán)白黑五種〕。 the matrix of a nail 【解剖學(xué)】指甲床。
matrix, the 駭客任務(wù),又名:二十二世紀(jì)殺人網(wǎng)絡(luò)或黑客帝國
2 . deduce the spectrum matrix of six - tire input under the conditions that the tractor is two - axle and four - wheel ( the rear wheel is double - tire ) and the artillery is one - axle and two - wheel 研究了牽引車為兩軸四輪(后輪為雙胎輪) ,火炮為單軸兩輪的六輪輸入譜矩陣。
In additive white gaussian noise ( awgn ) channel , we introduce a method for synchronization of symbol timing and frequency for two - dimensional spread spectrum system without prior knowledge of spread spectrum matrix 摘要針對加性白高斯噪聲信道,考慮未知二維擴(kuò)頻矩陣的條件下,提出了一種二維擴(kuò)頻系統(tǒng)的時(shí)頻同步方法。
Based on the periodical characteristic of the two - dimensional spread spectrum matrix , the method estimates the frequency offset , and then synchronizes the symbol timing by moving the position of data - storage window to calculate the maximum eigenvalue of correlation matrix 該方法利用二維擴(kuò)頻矩陣周期性重復(fù)的特點(diǎn),先估計(jì)出頻率偏差,再通過滑動暫存窗求相關(guān)矩陣最大特征值,完成信號的時(shí)間同步。
5 . the multi - point effect in frequency domain is studied , and the analytical procedure is simplified to some extent , that is , the responding data is accurate enough only with the input according to the first four degressively arranged eigenvalue of earthquake power spectrum matrix . there are disaccordant conclusions of multi - point input analys 5 、研究了頻域內(nèi)地震動的多點(diǎn)效應(yīng),并對計(jì)算過程進(jìn)行了一定程度的簡化,即只需要計(jì)算輸入地震動功率譜矩陣從大到小排列的前4個(gè)特征值所對應(yīng)的地震動的動力反應(yīng)。