spectrum n. (pl. -tra ) 1.【物理學(xué)】譜,光譜;波譜;能譜,質(zhì)譜。 2.【無(wú)線電】射頻頻譜;無(wú)線電(信號(hào))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(yáng)光譜。 a wide spectrum of opinion 意見(jiàn)的不同幅度甚大。
linear adj. 1.線的,直線的。 2.長(zhǎng)度的。 3.【數(shù)學(xué)】一次的,線性的。 4.【動(dòng)、植】線狀的;細(xì)長(zhǎng)的。 5.由線條組成的,以線條為主的,強(qiáng)調(diào)線條的。 linear amplification 直線放大。 a linear equation 一次方程式。 a linear leaf 線形葉。 linear arts 線條藝術(shù)。
For the observer this walk - in work opens up numerous perspectives and a linear spectrum of forms 在里面,大家可以從不同的角度看到四周的風(fēng)光和這一座流線型藝術(shù)品的各種形態(tài)。
The acoustic pressure information and particle velocity information are used to study the direction of the arrival estimation by analyzing strong linear spectrum of the single target basing on cross spectrum method 摘要利用矢量水聽(tīng)器收集到的聲壓和振速信息,研究基于互譜法分析單目標(biāo)的強(qiáng)線譜來(lái)進(jìn)行目標(biāo)方位估計(jì)。
In order to improve the precision of the direction of arrival estimation , the direct average and weighted average are used to process the multiply linear spectrum in analyzing multiply linear spectrum method 其中,在分析多線譜法方位估計(jì)時(shí),采用了直接平均和加權(quán)平均兩種處理方法對(duì)多線譜進(jìn)行處理,旨在提高目標(biāo)方位估計(jì)精度。
Three optimization methods are presented by researching the algebraic codebook excitation linear prediction ( acelp ) algorithm , and optimized the feel weighted filter , the search algorithm of the linear spectrum pair ( lsp ) , and the search method of the algebraic codebook respectively 通過(guò)研究tetra數(shù)字集群通信系統(tǒng)中的acelp語(yǔ)音編解碼算法,分別在感覺(jué)加權(quán)濾波器的設(shè)計(jì)、線譜對(duì)參數(shù)量化的搜索方式、代數(shù)碼本的搜索方式等三個(gè)方面提出了優(yōu)化算法。
The main contributions of the second part of this dissertation are focused on the cryptographic properties of logical functions over finite field , with the help of the properties of trace functions , and that of p - polynomials , as well as the permutation theory over finite field : the new definition of chrestenson linear spectrum is given and the relation between the new chrestenson linear spectrum and the chrestenson cyclic spectrum is presented , followed by the inverse formula of logical function over finite field ; the distribution for linear structures of the logical functions over finite field is discussed and the complete construction of logical functions taking on all vectors as linear structures is suggested , which leads to the conception of the extended affine functions over finite field , whose cryptographic properties is similar to that of the affine functions over field gf ( 2 ) and prime field fp ; the relationship between the degeneration of logical functions and the linear structures , the degeneration of logical functions and the support of chrestenson spectrum , as well as the relation between the nonlinearity and the linear structures are discussed ; using the relation of the logical functions over finite field and the vector logical functions over its prime field , we reveal the relationship between the perfect nonlinear functions over finite field and the vector generalized bent functions over its prime field ; the existence or not of the perfect nonlinear functions with any variables over any finite fields is offered , and some methods are proposed to construct the perfect nonlinear functions by using the balanced p - polynomials over finite field 重新定義了有限域上邏輯函數(shù)的chrestenson線性譜,考察了新定義的chrestenson線性譜和原來(lái)的chrestenson循環(huán)譜的關(guān)系,并利用一組對(duì)偶基給出了有限域上邏輯函數(shù)的反演公式;給出了有限域上隨機(jī)變量聯(lián)合分布的分解式,并利用隨機(jī)變量聯(lián)合分布的分解式對(duì)有限域上邏輯函數(shù)的密碼性質(zhì)進(jìn)行了研究;給出了有限域上邏輯函數(shù)與相應(yīng)素域上向量邏輯函數(shù)的關(guān)系,探討了它們之間密碼性質(zhì)的聯(lián)系,如平衡性,相關(guān)免疫性,擴(kuò)散性,線性結(jié)構(gòu)以及非線性度等;討論了有限域上邏輯函數(shù)各類線性結(jié)構(gòu)之間的關(guān)系,并給出了任意點(diǎn)都是線性結(jié)構(gòu)的邏輯函數(shù)的全部構(gòu)造,由此引出了有限域上的“泛仿射函數(shù)”的概念;考察了有限域上邏輯函數(shù)的退化性與線性結(jié)構(gòu)的關(guān)系、退化性與chrestenson譜支集的關(guān)系;給出了有限域邏輯函數(shù)非線性度的定義,利用有限域上邏輯函數(shù)的非線性度與相應(yīng)素域上向量邏輯函數(shù)非線性度的關(guān)系,考察了有限域上邏輯函數(shù)的非線性度與線性結(jié)構(gòu)的關(guān)系;利用有限域上邏輯函數(shù)與相信息工程大學(xué)博士學(xué)位論文應(yīng)素域上向量邏輯函數(shù)的關(guān)系,揭示了有限域上的廣義bent函數(shù)與相應(yīng)素域上的廣義bent函數(shù)的關(guān)系,以及有限域上的完全非線性函數(shù)與相應(yīng)素域上向量廣義bent函數(shù)之間的關(guān)系;給出了任意有限域上任意。
Based on the character of ultrasonic spectrum analysis , considering the affection of the circuit responsion of checking system , coupling state , position of checking transducer , this thesis established reasonable ultrasonic spectrum analysis method . using this method , several kinds of linear spectrum ( such as phase amplitude spectrum , phase power spectrum ) were researched and discussed 本文根據(jù)超聲波頻譜分析的特點(diǎn),綜合考慮了檢測(cè)電路響應(yīng)、耦合狀況、探頭位置等因素的影響,制定出了一套合理的超聲波頻譜分析方法,并用此方法對(duì)幾種線性譜(如相位幅度譜、相位功率譜等)進(jìn)行了研究和探討。