spectrum n. (pl. -tra ) 1.【物理學】譜,光譜;波譜;能譜,質譜。 2.【無線電】射頻頻譜;無線電(信號)頻譜。 3.【心理學】(眼睛的)余像;殘像。 4.〔轉義〕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。
distribution n. 1.分配,分發(fā),配給;分配裝置[系統(tǒng)];配給品;配給量;【經濟學】配給方法,配給過程;分紅;【法律】(無遺囑死亡者的)財產分配。 2.分布,配置,分布狀態(tài);【生物學】(生物的)分布范圍;【無線電】頻率分布。 3.分類,整理,區(qū)分。 4.【電學】配電;【機械工程】配汽;【印刷】拆版;【邏輯學】周延(性)。 5.銷售。 the distribution of wealth 財富的分配。 the accurate distribution of zoological specimens 動物品種的精確分類。 live on charitable distributions alone 完全依靠配給救濟品生活。 the distribution of coniferous forests 針葉林的分布范圍。 the distribution of troops 部隊配置。 The distribution of our school paper is now 3000. 我們??陌l(fā)行量現(xiàn)在是3000份。 We have a good harvest but our distribution is bad. 我們豐收了,但是產品賣不出去。
Retrospective clinical analysis on pathogen spectrum distribution and antimicrobid resistance in vap 社區(qū)獲得性尿路感染菌群分布及耐藥性分析
A doctor can find different spectrum distribution at each time segment , and can also look over frequency field corresponding time domain information 醫(yī)生可以查找任一時段的不同譜峰分布,也可以查看任一頻段對應的時域情況。
For a start , the principle , configuration , spectrum distribution of dds are illuminated in this paper . the distributions of spurious frequency are specially analyzed in this section 本文首先講述了dds的原理、結構和頻譜分布,其中重點講述了dds的頻譜分布的雜散分析。
However , the efficiency of pwm at light load is low and the filter design of pfm is rather difficult due to the random characteristic of the frequency spectrum distribution 采用相應調制方式的ic品種繁多,各有千秋。但pwm在輕載時效率較低,而pfm由于頻譜分布隨機,不利于后續(xù)濾波器的設計。
As a result of interference of light , the spectrum distribution of light will change in some condition when it pass through some medium , and the change is determined by the parameter of the medium 利用光譜儀測量干涉后的光譜分布,再結合優(yōu)化算法擬合測量光譜曲線,反演出光學介質的某些未知物理參數(shù)。
This paper illuminates theory , structure , spectrum distribution , merits and defects , especially spurs of direct digital synthesis ( dds ) , and it then introduces phase locked loop ( pll ) theory 對dds的結構、優(yōu)缺點、頻譜分布,特別是雜散性能進行了詳細的闡述。接著,又介紹了鎖相環(huán)( pll )的原理。
It reduces the “ music noise ” using the human auditory characteristics , and enhances the hearing quality using the speech spectrum distribution characteristics in the time - frequency dimension 主要以譜減法為基礎,結合人耳的聽覺特性從而減少殘留“音樂噪聲”的影響;結合語音的語譜在時-頻域分布特性從而提高增強后語音的聽覺質量。
According to the characteristics of the human pronunciation and the speech spectrum distribution in the time - frequency dimension , the paper finds out that there is a shortcoming of the speech enhancement system which is based on the masking properties of human auditory 根據(jù)人的發(fā)音特點,通過分析語音的語譜在時-頻域的分布,發(fā)現(xiàn)把聽覺掩蔽效應應用于語音增強時存在不足之處。
The work was held out by the fund of nature science , 863 fund and innovation fund of chinese academy of sciences . in this work , we firstly got the relative spectrum distribution of lpp source with jet gas target in domestic lpp source study 該項工作是在國家基金、 863 、中科院創(chuàng)新基金支持下完成的,首次在國內獲得噴氣靶激光等離子體光源的相對光譜分布,為進一步進行高精度測量工作奠定了基礎。
On the basis of lorenz - mie theory , this paper is devoted to the research on characteristics of intensity and spectrum distributions of each order rainbow for a homogeneous particle , with the usage of geometric optics theory , airy theory and debye theory 本文基于小粒子散射的lorenz mie理論,結合彩虹的其它理論(幾何光學理論、 airy理論、 debye理論)研究了均勻球、柱粒子各階彩虹強度分布和頻譜特點。