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 意見的不同幅度甚大。
character n. 1.性格,品格;特性,性狀,特征;【生物學(xué)】形質(zhì)。 2.身分,地位,資格。 3.名聲,聲望。 4.(戲劇、小說(shuō)中的)角色,人物。 5.人,〔口語(yǔ)〕怪人,奇人。 6.字,字母;數(shù)字;(印刷)符號(hào);電碼組合;【計(jì)算機(jī)】字符。 7.品德證明書,鑒定,推薦書。 8.人物[性格]素描。 a man of character有個(gè)性[骨氣]的人。 the national character=the character of a people 國(guó)民性。 a generic character【生物學(xué)】屬的特征,屬性。 a leading character主角。 a bad character 壞人,歹徒,惡棍。 He is quite a character. 他簡(jiǎn)直是一個(gè)怪人。 a Chinese character漢字。 character portrayal 性格描寫。 character sketch 人物簡(jiǎn)評(píng)[素描]。 get a good [bad] character得好[壞]名。 give (sb.) a good [bad] character 推獎(jiǎng)[攻擊](某人)。 have an insight into character 有知人之明。 in character (在)性格上;正合擔(dān)任[扮演];適當(dāng),相稱。 in the character of 以…的資格;扮演。 out of character 不適當(dāng)[適合],不稱( go out of character越分妄為)。 take away sb.'s character 奪人名譽(yù)。 take on character 有特征[特色]。 vt. 1.〔詩(shī)、古〕寫,畫;刻。 2.表現(xiàn)…的特性;使具有特性。 adj. -less 無(wú)特征的,平凡的。
The chemistry and spectrum character of red pigment of nature duck eggs red yolk 天然紅心鴨蛋中紅色素的化學(xué)及光譜性質(zhì)研究
Some characters and fourier spectrum characters of the almost perfect autocorrelation sequence pairs are discussed, and the necessary conditions of existences of the almost perfect auto-correlation sequence pairs are given 其次,提出了幾乎最佳自相關(guān)序列偶的理論,它是幾乎最佳自相關(guān)序列的深入和發(fā)展,探討了它的性質(zhì),譜特性,存在的必要條件。
The main working contents of this paper is following : 1 according to the theory of electromagnetic induction law, a new radio induction system is proposed based on the traditional radio induction technology, analyzed on its signal transmission character and its frequency spectrum character . the channel composed of the new radio induction system is compared with the parameter-constant channel and the parameter-changing channel . the application of the new radio induction system is studied in converter supply 本文的主要工作內(nèi)容如下:1在現(xiàn)有的無(wú)線感應(yīng)技術(shù)基礎(chǔ)上,基于電磁感應(yīng)理論,提出了新型無(wú)線感應(yīng)系統(tǒng),分析了新型無(wú)線感應(yīng)系統(tǒng)的信號(hào)傳輸特性,分析了新型無(wú)線感應(yīng)系統(tǒng)的頻譜特性,把新型無(wú)線感應(yīng)系統(tǒng)組成的信道和恒參信道、變參信道進(jìn)行了比較,研究了新型無(wú)線感應(yīng)系統(tǒng)在變流器供電中的應(yīng)用。
Testing datas are gathered by using data picking box cras . a general dynamic model for analyzing characters of vibration system has also been developed according to the input and output applied on the testing system . identifications for structure modal parameters and frequency-spectrum characters have been carried out by calling the interface software developed unpon matlab software in both the time field and the frequency field . the structure modal parameters and frequency-spectrum characters have been accurately calculated 利用cras數(shù)據(jù)采集箱的數(shù)據(jù)采集功能對(duì)系統(tǒng)的信號(hào)進(jìn)行數(shù)據(jù)采集,通過(guò)接口軟件調(diào)用matlab軟件平臺(tái),分別針對(duì)時(shí)間域和頻率域兩種研究方向,解決振動(dòng)系統(tǒng)模態(tài)參數(shù)的辯識(shí)問(wèn)題和結(jié)構(gòu)的頻譜特性分析問(wèn)題,得到系統(tǒng)的相干函數(shù)等頻譜特性,獲得模態(tài)參數(shù),如模態(tài)頻率、阻尼等的精確解。
Testing datas are gathered by using data picking box cras . a general dynamic model for analyzing characters of vibration system has also been developed according to the input and output applied on the testing system . identifications for structure modal parameters and frequency-spectrum characters have been carried out by calling the interface software developed unpon matlab software in both the time field and the frequency field . the structure modal parameters and frequency-spectrum characters have been accurately calculated 利用cras數(shù)據(jù)采集箱的數(shù)據(jù)采集功能對(duì)系統(tǒng)的信號(hào)進(jìn)行數(shù)據(jù)采集,通過(guò)接口軟件調(diào)用matlab軟件平臺(tái),分別針對(duì)時(shí)間域和頻率域兩種研究方向,解決振動(dòng)系統(tǒng)模態(tài)參數(shù)的辯識(shí)問(wèn)題和結(jié)構(gòu)的頻譜特性分析問(wèn)題,得到系統(tǒng)的相干函數(shù)等頻譜特性,獲得模態(tài)參數(shù),如模態(tài)頻率、阻尼等的精確解。
Due to the needs for the flat spectrum character, the leading sequence requires high self-correlation . the author selected a series of sequences whose highest peek to second highest peek ratio is big, from a series of " m " sequences . then, the optimized leading sequences were judged according to glf, the sequences which have lower glf would be more proper for the estimation 首先,作者提出搜索的標(biāo)準(zhǔn),根據(jù)前導(dǎo)序列要有平坦的譜特性,從而要有好的自相關(guān)性,從一種m序列中找出最大峰與次大峰比例較大的一些序列,然后根據(jù)增益損耗因子來(lái)判決最佳前導(dǎo)序列,增益損耗因子越小的序列越適于估計(jì)。
The influence of the cloud droplet spectrum character and the spectrum growth and change is considered, which does not use a cut-off value for conversion from cloud water into rain water process . in the continuous coalescence equation, the particles fall velocity difference is not moved out from the integral, but is integrated in the equation as the function of diameter d to avoid the error of using particles average fall velocity . in the new scheme, generation rate of graupel due to the collection of snow by graupel and the collection of cloud ice by graupel are included 云中凝結(jié)核ccn的數(shù)濃度采用超幾何函數(shù)表示;云水向雨水的自動(dòng)轉(zhuǎn)換過(guò)程采用grabowski(1999)的公式,考慮了云滴譜的特征和發(fā)展變化對(duì)該過(guò)程的影響,而不是采用原方案給定閾值的方法描述該過(guò)程;對(duì)連續(xù)碰并方程不再將粒子落速差作為常量提出積分號(hào)外,而是直接作為粒子直徑函數(shù)在積分號(hào)內(nèi)求解,這樣處理可以回避使用粒子群的平均落速帶來(lái)的誤差;增加了霰和雪、霰和冰晶的碰并微物理過(guò)程。
The outputs of tests on the thin plate under different inputs have been investigated for testifying the system . different solutions have been compared according to the frequency-spectrum characters and structure modal parameters . it is indicated that the solutions in this paper are consistent with the solution of the fea methods 以薄鋼板為實(shí)例,探討了不同激勵(lì)條件下,包括正弦穩(wěn)態(tài)激勵(lì)、正弦慢掃描、單次錘擊和隨機(jī)錘擊激勵(lì),薄鋼板振動(dòng)系統(tǒng)的響應(yīng)情況,以頻譜特性和模態(tài)參數(shù)為參考,將各種方法的求解結(jié)果作了比較,結(jié)果表明:本系統(tǒng)得出的結(jié)果與有限元解具有一致性。
1 . the principles of mgti interleaver is analyzed . through discussing the relation of its output spectra characters and design parameters, we get successfully the best design parameters and rectangle interleaved spectra; thinking over practical requirement of wdm system, the design parameters of 50ghz interleaver and their errors are presented carefully; according to the spectral function of f-p interferometer with multi-mirror, we discuss the spectra character of g-t resonator, and analyze the dispersion of mgti interleaver; the effect of the polarization effect of splitter on isolation of mgti interleaver is analyzed experimentally and theoretically . 2 1、分析了mgti型interleaver濾波器的基本原理,討論了輸出光譜參數(shù)和設(shè)計(jì)參數(shù)之間的關(guān)系,獲得了實(shí)現(xiàn)矩形化光譜的最佳設(shè)計(jì)參數(shù);根據(jù)dwdm系統(tǒng)的實(shí)際要求,具體給出了信道間隔為50ghz的mgti型interleaver濾波器設(shè)計(jì)參數(shù)及其誤差分析;從多鏡f-p腔光譜特性出發(fā),討論了g-t腔的特性,進(jìn)而分析了mgti型interleaver濾波器的色散特性;理論結(jié)合實(shí)驗(yàn),分析了interleaver濾波器中偏振分光鏡偏振效應(yīng)對(duì)器件隔離度的影響。