spectral sequence 中文意思是什麼
spectral sequence
解釋
光譜序列-
Furthermore, we also reserch the influence of setllar age to stellar activity of late - type stars. the relation of stellar chromospheric activity and rotation of late - type main sequence stars depend on stellar spectral type
大樣本分析顯示晚型主序恆星的色球活動與恆星自轉參量的研究晚型主序恆星的色球活動與恆星自轉參量間的關系表現出對恆星光譜型的依賴。 -
The parallel combinatorial spread spectrum provides high spectral efficiency and the data rate of the parallel combinatorial spread spectrum is higher than that of the direct sequence spread spectrum. this thesis studies on the mapping between data and spread sequence in the parallel combinatorial spread spectrum system and presents a mapping method based on the lexicographic order. the mapping method resolves the many to one mapping problem of the past method
本文研究了并行組合擴頻中數據和擴頻序列之間的映射方法，指出了已有的一種不定方程求解演算法中存在的映射不唯一問題，應用組合數學中的相關理論，將映射問題轉化為廠組合問題，提出了基於字典順序的并行組合擴頻數據映射演算法，該演算法具有普遍性，解決了原有演算法中的多一映射問題。 -
Abstract : by using the pulse - sequence model ， the inverse problem of amplification of broad - spectral - bandwidth laser pulse has been studied ， i. e. ， to find the initial input temporal pulse profile ， spatial profile ， spectral distribution and fluence from the required output temporal ， spatial pulse profile ， spectral distribution and fluence as well as the given amplifier parameters
文摘:採用脈沖分割模型，研究了寬頻帶激光脈沖放大的逆問題，即由所要求的輸出激光脈沖時間、空間波形、光譜分佈和能量密度，並給定放大器參數情況下，求輸入激光脈沖時間波形、空間、光譜分佈。 -
A convenient classification of stars is based upon the observed sequence of spectral types.
一種實用的恆星分類法是基於測得的光譜類型序列。 -
Frequency code is not uniformity distribution and keeps to a probability distribution function defined by the spectral characteristics of the target of interest. the phase code is equally duality pseudo - random sequence and used to reduced the sidelobes of the signal correlation function. and the mismatch - phase sequence is corresponding with the frequency sequence one by one
而頻率編碼為不均勻分佈，由所觀測目標的頻譜信息提取出概率密度函數決定頻率編碼序列的分佈；相位編碼為二元的偽隨機序列，採取均勻的二相編碼，消減同頻脈沖帶來的過高的相關函數的旁瓣；而失配相位為與頻率編碼相一一對應于各子脈沖中。 -
Regular spectral sequence
正則譜序列 -
In addition, diagrams of the 221 bicyclic graphs on eight vertices are given in appendix which are ordered lexicographically by spectra moments, and for each graph from table 1 the degree sequence and the first six spectral moments are given in table 2
另外，為了更為直觀地反映以上規律，在本文的附錄中給出了按照譜矩序列先後順序排列的所有八階雙圈圖以及它們的度序列和第1至第6階譜矩序列。 -
Ds signal is twice modulated with the rapid pseudorandom noise sequence and the carrier. so it appears cyclostationary. in the field of spectral correlation, ds signals appears its characteristic as fallows : for the amplitude of spectral correlation, the information of carrier frequency and pn code rate are contained on the spectrum frequency equal to zero sheet, and also the pn code rate is contained on the sheet of spectrum frequency equal to carrier frequency ; for the phase of spectral correlation, the information of carrier initial phase is contained on the sheet of cyclic frequency equal to double carrier frequency
Ds信號是經過高速偽隨機序列和正弦載波二次調制的寬帶信號，因此具有周期平穩特性，它在譜相關域表現為:幅頻特性在譜頻率等於零截面切片上包含了載頻和偽碼速率信息特徵，在譜頻率等於載頻截面切片上包含了偽碼速率信息特徵;相頻特性在循環頻率等於兩倍載頻截面切片上包含了載波初相信息特徵。 -
On the module and spectral of almost periodic sequence in banach space
空間中概周期序列的譜 -
The square detection can picks up the carrier frequencies, which is simple and has great performance. but this method can ’ t recognize the signal as spread spectrum signal. the spectral correlation detection method can estimates the chip rate of signal ’ s pn sequence
然後，針對異步的cdma信號，採用延遲相乘的方法檢測用戶數目，同時估計出各用戶信號的幅值和相位;該方法的缺點是各用戶信號必須有一定的相差，同時用戶數不能太多。 -
The shortcoming of spectral detection is its complexity and in need of long time to compute. a simple and powerful approach is cepstrum detection method, which can estimate pn sequence ’ s time period. using this parameter and the pn chip rate estimated by spectral correlation method, we can get another parameter, length of the pn sequence
另外，本文還嘗試利用cdma信號的相位重復特性，解決各用戶pn序列的分離問題;但這種方法只能在有一定先驗知識的條件下，對包含較少用戶的ds / cdma信號有較好效果，能夠簡單快速的實現用戶pn序列的分離與估計。 -
First, it is associated with the prepared conditions of spectral pure graphite electrode ; second, compared with the untreated graphite, the surface functional groups of ? oh and ? cooh on the treated one increased dramatically with hot concentrated h2so4 and the impurities on electrode surface decreased significantly with ultrasonic rinse. a sequence reaction mechanism was proposed for the eis of mn ( ) / mn ( ) on different graphite electrodes. the spectral graphite and the treated one can be suitable for the inert electrode of mn ( ) / mn ( ) cathode
分析原因認為：一方面與光譜純石墨電極的制備條件有關；另一方面，與未處理石墨電極相比，處理石墨表面含氧官能團? oh 、 ? cooh明顯增多，而且超聲清洗又使其表面雜質含量減少，並提出了一個反應機理解釋mn （ iii ） / mn （ ii ）電對在三種石墨電極上阻抗譜的不同，說明光譜純石墨和處理石墨均可以作為mn （ iii ） / mn （ ii ）正極電對的惰性工作電極。 -
Several methods of sequence spread spectrum signals direction have been developed, such as energy detection, correlation detection, cepstrum detection, cyclic spectral, higher order cumulant detection, etc. these methods developed from the research of detection and estimation for ds signals
直擴通信信號檢測的研究已發展出許多方法，如能量法、相關法、倒譜法、周期譜法及高階譜法等。 -
From o to m. hottest stars are spectral type o, and coolest stars are type m. the standard mnemonic to remember the sequence of spectral types is oh, be a fine girl, kiss me
由最熱的o型恆星開始，接著是b型a型f型g型k型，最後是最冷的m型。 -
The corona activity of late - type main sequence stars also depend on the stellar spectral type
晚型主序星的冕球活動也表現出對恆星光譜型的依賴性。 -
Galileo also mapped some of the maria using spectral filters that provided information on surface composition ; the results suggested that researchers could use remote spacecraft data to delineate the sequence of lava flows in the maria
伽利略太空船也透過不同波長的濾光鏡描畫了若干月海，得到表面組成的資訊；這些結果證明，研究人員可以利用太空船遙測資料來記述月海內巖漿流的時序。
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