相對噪聲 的英文怎麼說

中文拼音 [xiāngduìzàoshēng]
相對噪聲 英文
relative noise
  • : 相Ⅰ名詞1 (相貌; 外貌) looks; appearance 2 (坐、立等的姿態) bearing; posture 3 [物理學] (相位...
  • : Ⅰ動詞1 (回答) answer; reply 2 (對待; 對付) treat; cope with; counter 3 (朝; 向; 面對) be tr...
  • : 動詞1. (蟲或鳥叫) chirp 2. (大聲叫嚷) make noise; make an uproar; clamour
  • 相對 : 1. (面對面) opposite; face to face 2. (非絕對的) relative 3. (比較的) relatively; comparatively
  1. Letter ratio : point biggest not lose the signal strength of the true voice with at the same time of the emanative noise strength opposite voice for of ratio, usually with meaning, letter comparing more bigly, turn on electricitying the road more small, quality more pure and unadulterated. want to choose the letter the ratio in the product of above. new of summer is with the series the product s letter ratio all in the above, have more professional of performance

    比:指最大不失真音的信號強度與同時發出的音強度之間的比率,通常以表示,信比越大,功放電路的相對噪聲就越小,音質就越純正。要選信比在以上的產品。夏新和系列產品的信比都在以上,有更加專業的表現。
  2. With the established rf front - end system simulation platform, adding the digital modulated baseband signal, this paper simulated the multifold digital modulated signal ’ s transmission, such as 2ask, qpsk, and 16qam. then researches of power compression and phase noise of local oscillation influence the bit error ratio for different modulated system. the designing is satisfied multifold functions request with the high - powered and integrated broadband rf front - end

    隨后在建立的寬帶射頻前端通用模擬平臺上,加入基帶數字調制信號,多種數字調制格式的信號在該通用平臺上的傳輸作了研究,模擬了2ask 、 qpsk和16qam等調制格式信號的發射與接收,研究了功率壓縮和本振不同調制的誤碼率影響,實現了滿足多種功能要求的寬帶高性能綜合射頻前端的設計。
  3. Pattern analysis and machine intelligence, 1999, 21 : 1312 - 1328. 3 shen d, wong w, ip h h s. affine - invariant image retrieval by correspondence matching of shape

    第三,全局的圖象結構比局部圖像特徵更魯棒,但圖像畸變卻更敏感。
  4. With linear time - invariant modeling of phase noise and definition of “ effective resistor ”, we analyze the critical parameters of the circuit and calculate the value of phase noise at the 1 / f ~ 2 region

    引入「有效電阻」的概念電路的各項關鍵參數在線性時不變模型下進行理論分析和推導,得到在1f2區域的理論值。
  5. Based on the analysis of transistor amplifier noise model, we select devices with low noise in reason. and the method how to reduce phase noise and phase jitter is also discussed

    依據晶體管放大器的模型分析合理選擇了低的元器件,降低位抖動的方法作了一些探討。
  6. So the pipe system sends out noise because of resonance. especially the frequency 250hz of pulsating water is in close proximity to natural frequency of pipe, so the 250hz is a dangerous frequency to the pipe system. there is another reason why the noise is reached to 110db ( a ) in pump room that the noise is magnified by the cistern because of the resonance of cistern

    特別是激勵頻率為250hz的頻率分量恰好與管道系統的固有頻率接近,其引起的管道振動的貢獻最突出,同時也與水泵房房腔的固有頻率接近,從而引起房腔共鳴發,使進一步被放大,以至於最大處高達105db ( a ) 。
  7. The expected noise level calculated by this model confroms to the measured noise level. and we carried out noise annoyance investigation by sending out larges of questionnaires in different noise sensitive regions such as residential quarters and schools in order to know the effects of combined overhead road noise on subjective annoyance. by aulyztng the relationship of the annoyance effective factors ( noise effective factors and non - noise effective factors ) and noise annoyace, the mainly effective factors were maken out

    同時針不同的敏感區域,進行了大量地高架復合道路主觀煩惱度調查研究,通過因子及非因子與主觀煩惱度的關關系分析,確定影響高架交通主觀煩惱的主要的非因子,並建立了煩惱度的預測模型,得出了不同敏感區域的高架交通的煩惱度閾值。
  8. At first, the pll part and the dds part have been explained rigidly in mathematics. then how the phrase noise and the spur influences the circuit has been discussed in this paper. the above analysis is the basic of designing high performance frequency synthesizers

    本文首先pll部分和dds的理論做了嚴格的數學解釋,並其雜散頻譜和進行了討論,給出了其雜散分佈規律及降低雜散的設計方法。
  9. We did some analysis about the relativity between the vibration and the noise of the wheel. after the testing of the first line of guangzhou underground, we found that the existing wheel damper has nothing to do with the noise of wheel less than four thousands hz. compared of different contributions of the tread vibration and the web vibration on sound level of railway noise

    在實驗過程中,改進了車輪的激振方式,利用單擺激振提高了激振力的精度;實驗分析了車輪阻尼器的結構、安裝方式及其動力學參數車輪阻尼器降效果的影響;也分析了車輪振動與關性;現場測試廣州地鐵一號線的特性,確定了車輪阻尼器所要控制的頻率范圍;比分析不同激振情況下,踏面徑向振動與輻板軸向振動壓級的貢獻比例。
  10. Different with the traditional ifog, light beams within mz - ifog transmit along the forward direction, which avoid the kerr effect noise and the interferometric noises brought by the backward scattering and reflecting light. mz - ifog also gains a high using efficiency of light source and a strong output signal. the principle of mz - ifog is analyzed

    與傳統sagnac干涉式光纖陀螺不同,此光纖陀螺結構簡單,兩路光信號採用前向傳輸,避免了後向傳輸光光源的影響,也避免了後向散射、反射光帶來的以及光學kerr效應,光功率利用率高,輸出光功率大。
  11. In addition, this paper analyzes the noise - filtering quality of phase locked loop, a / d transformation theory, and the combination and quality of the decimation filter

    的過濾性能、 a / d轉換原理和抽取濾波的組成及性能進行了深入地分析。
  12. The basic operation principle of phase - locked frequency synthesizer and the type of circuits are expatiated systematicly in this paper. the principle of operation on sampling phase detector and some characteristics including the linear tracking and phase noise in phase loop circuits are analyzed deeply. the research is emphased on the theory and design method of circuits in the sampling phase - locked frequency synthesizer. then, the expansion capturing circuit is analyzed and designed for better performance of capturing loop circuits. at last, the loop filter is also analyzed and contrived taking account of effection of additional phase shift by the sampling - holder. the general research on the theory and technology of sampling phase lock in the paper will make a basement for the development of new product

    本文系統的闡述了鎖頻率合成器的基本工作原理及電路類型;較深入地分析了取樣鑒工作原理及電路、鎖環路的線性跟蹤特性和特性;重點取樣鎖頻率合成器電路理論和設計方法進行了研究;為了改善環路的捕獲性能,擴捕電路進行了分析和設計,並用wewb32軟體電路進行了模擬;考慮到取樣保持器的附加移影響,環路濾波器進行了分析和設計。
  13. Frequency source is widely used in today ' s electronic equipment and even refered as " a heart " of many electronic systems. the frequency synthesizer with a lot of channels and high frequency stability by means of theory of phase locking has almost been a necessary component in the modern electronic systems such as telecommunication, radar and electronic countermeasure. the phase - locked frequency synthesizer can be generally divided into two kinds : one is digital phase locked frequency synthesizer, the other is analog sampling phase locked frequency synthesizer. compared with the prior, the latter has many merits such as lower phase noise, samller volume, lighter weight and lower power consumption and has a wide foreground in the equipments of microwave band

    利用鎖原理來獲得波道數目眾多、頻率穩定度很高的頻率合成器,幾乎已成為現代通信、雷達和電子抗等電子系統不可缺少的組成部分。鎖式頻率合成器一般分為數字鎖頻率合成器和模擬取樣鎖頻率合成器兩類。取樣鎖頻率合成器與數字鎖頻率合成器比,具有低、體積小、重量輕和功耗低等優點,尤其在微波波段的電子設備中,具有廣闊的應用前景。
  14. In this paper a kind of interferometric optical fiber gyroscopes based on mach - zehnder interferometric principle is proposed. the signals of this novel optical fiber gyroscope transmit along the positive direction, which avoid the interferometric noise, causing by the negative - directional scattering light and reflecting light, and the kerr effect noise. in this novel optical fiber gyroscope the light power ' s utilization efficiency is high, the output signal is strong

    本文提出一種基於mz干涉原理的干涉式光纖陀螺,該種光纖陀螺的光信號採用正向傳輸,避免了後向傳輸光光源的影響,也避免後向散射、反射光帶來的以及光學kerr效應,光功率利用率高,輸出光信號大。
  15. The resonance network is connected to the gate, then the output and input matching network is designed to satisfy the oscillation criteria. then harmonic balance method is used to analysize and optimize the output power and phase noise. to minimize the load pulling effect a buffer amplifier is designed to isolate the oscillator and the load

    本文在場效應管fet柵極上加上諧振網路(諧振網路是通過cst模擬得到的,它是串聯反饋迴路,介質工作在te01模,于其後的fet ,它又當於一個帶阻濾波器) ,然後設計輸入輸出匹配電路,使電路結構滿足起振條件,之後繼續用諧波平衡法模擬和優化,使振蕩器輸出功率合適,很低。
  16. Entropy of an image is to express the smoothness or homogeneity of the image. while computing in a local window, if there exist edges, the local image will not be homogenous, variation of the grayness will be sharp and the entropy obtained will be low. otherwise, the entropy will be high. given the threshold of entropy, it can be determined whether or not exist edges. because entropy operator is sensitive to noise, the effect is bad if it is directly used to detect edges. in view of the deficiency, the paper comes up with an edge detection method in which entropy operator is combined with noise removal. if the entropy computed is higher than the threshold, it will be necessary to determine whether it is caused by noise or by edges. thus edge detection and noise removal can be made at the same time. with this method satisfactory effect has been achieved by experimenting upon image with low ratio of signal to noise

    圖像的熵用來刻劃圖像的平滑性或均勻性.在圖像的局部窗口中計算時,如果窗口中存在邊界,則窗口中的圖像不均勻,其灰度變化急劇,計算出的熵小;反之熵大.設定熵的閾值,即可判斷是否存在邊界.由於熵運算元很敏感,直接用它進行邊界檢測,效果很差.文中針這一缺陷,提出將熵運算元與去結合的邊界檢測法,如果計算出的熵大於閾值,要判斷是的出現所引起,還是邊界的出現所引起,這樣,邊檢測邊界邊去.用該方法比較低的圖像進行實驗,得到了滿意的效果
  17. Then according to the emphasis of the design, went deeply into the theory of pll frequency synthesizers widely used, described pll ’ s working principle, structure and several types in detail, and made research and analysis of pll frequency synthesizers ’ phase noise, including the effect of the active loop filter on the phase noise, and give some methods to make improvement as well, such as changing loop filter form, reducing divide number, and increase phase detector frequency, etc. then paper introduced the principle character and phase noise analysis of direct digital frequency synthesizer ( dds ) and injection phase lock circuit, which are also important circuits in the design

    論文首先幾十年頻率合成器的發展進行概述,而後針本次設計的重點,應用較為廣泛的鎖頻率合成理論進行了深入的探討,詳細介紹了鎖環的工作原理、組成結構和鎖類型,並頻率合成器的特性進行了研究分析,包括有源環路濾波器的影響,提出了改善的幾點措施:改善環路形式、降低分頻數、增大鑒頻率等。接著介紹了直接數字頻率合成器( dds )和注入鎖電路的原理特點以及分析,它們也是本次設計的重要電路。
  18. This method based on differenced frame process and utilizes double constraints of relative gaussian noise and block energy to detect the change region

    該方法通過基於塊的幀差處理,利用相對噪聲服從高斯分佈的特性和能量的屬性的雙重約束來檢測運動變化區域。
  19. Compared with the traditional detective methodes based on frame difference, the operation of the method is more less. because the threshold based on noise characteristic parameters is adaptive produced, algorithmic adaptability is better

    與傳統的基於像素的幀間差分法比,運算量較小。根據相對噪聲的特徵參數所估計的相對噪聲的閾值是在檢測過程中自適應生成的,適用性較強。
  20. First, we analysis the general theoretical model of video segmentation. secondly, based on the model, an automatic detection algorithm of motion - changed regions is proposed from the point of fuzzy entropy clustering. motion - changed regions are detected, using a fuzzy clustering rule to distinguish between the relative noisy and motion - changed regions in time - differenced image

    論文首先討論了時差分視頻分割的一般理論模型,然後在建立的視頻分割模型的基礎上,從模糊熵聚類的角度出發提出了一種視頻運動變化區域自動檢測的方法,通過建立的模糊分類準則在差分圖像中運動變化區域和相對噪聲區域進行劃分,從而得到運動變化區域。
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