空間噪聲 的英文怎麼說

中文拼音 [kōngjiānzàoshēng]
空間噪聲 英文
jansky noise
  • : 空Ⅰ形容詞(不包含什麼; 裏面沒有東西或沒有內容; 不切實際的) empty; hollow; void Ⅱ名詞1 (天空) s...
  • : 間Ⅰ名詞1 (中間) between; among 2 (一定的空間或時間里) with a definite time or space 3 (一間...
  • : 動詞1. (蟲或鳥叫) chirp 2. (大聲叫嚷) make noise; make an uproar; clamour
  • 空間 : space; enclosure; room; blank; interspace
  1. Compared with traditional mechanical and optic gyros, hrg has such advantages as no high speed circumvolving or moving parts in structure, no warm - up time and short start - up time, wide signal band in frequency, low excursion noises, great endurance in over loading, nuclear radiation and short time power off, small bulk, light weight, low power cost and long life, which is suitable for space applications

    與傳統的機械陀螺和光學陀螺相比,半球諧振陀螺具有如下優勢:結構上無高速轉子、無活動部件;不需預熱,啟動時短;信號頻帶寬,漂移低;能承受大的機動過載;抗核輻射,並可經受短時電源中斷的影響;體積小,重量輕,功耗低,壽命長,非常適合應用。
  2. The process of feature extraction is to transform the eradiate noise signal to different feature space and extract the feature vectors that reflect the category of the input sample. the extracted features are the input modes to the classifier

    特徵提取的過程是把輸入的船舶輻射信號變換到不同的特徵,提取出反映樣本的類別特性的特徵向量,並把其作為分類器的輸入模式。
  3. An under estimation of the hearing effects by the low frequency noise could be happened. that is to say, even if the a - weight sound level is small, the low frequency noise may annoy to listener by the different ways from the high frequency noise. so it is necessary to understand psychoacoustics in order to make noise quality evaluations that match the subjective experience of the purchaser

    同時應用主觀評價方法?成對比較法( paircomparisonstatisticalevaluationmethods )對不同家用調器進行主觀評價試驗,並與客觀評價結果進行了對比,結果表明:人主觀響應(煩躁程度)與各心理學評價指標之均具有很高的相關性,相關系數一般均大於0 . 9 ,而與a計權壓級之的相關系數只有0 . 78 。
  4. All of above presents the data to study the algorithm which will be used to detect the targets against the broadened bragg lines. eigenstucture - based algorithms are used to realize bearing resolution on the basis of synthetically comparing several classical algorithms. first sea echo ’ s bearing prior knowledge is utilized to constitute project operator to constraint the noise subspace estimation with the use of constrained music algorithms, which largely increases the resolution and doa estimated accuracy

    為檢測海上目標的方位信息,在綜合分析比較各類演算法的基礎上,本文採用特徵結構類演算法來實現方位分辨中的constrainedmusic演算法,此方法充分利用了海浪的方位先驗信息來構造投影運算元約束的估計,大大提高了目標解析度和估計精度。
  5. Abstract : in the paper, based on the problem that strong reactive background noise can bring about a big measurement error when sound power is measured in a narrow room, such as power room in a diesel locomotive, it is analyzed theoretically that sound power is measured and carried out by using sound intensity probe hood, and sound power of diesel engine surface noise is measured in a power room

    文摘:在狹小如內燃機車動力室的條件下,測量柴油機表面功率時,動力室內抗性背景很強引起較大的測量誤差,從理論上分析了採用強探頭罩進行功率測量的可行性,並進行了內燃機車柴油機表面功率測量。
  6. This method uses two spatially separated receiving equipment. cross correlation of the two outputs will therefore yield the auto correlation function ( acf ) of the signal, plus noise which is spread uniformly over the whole width

    該演算法採用上分離的兩路接收設備,通過對包含同一個信號的2個輸出信號互相關,得到信號窄自相關函數( acf )和在整個帶寬里均勻分佈成分。
  7. This thesis was divided into eight chapters, and the main results and innovations obtained here can be summarized as follows : ( 1 ) the physics model of tsrs in frequency conversion crystals has been built up firstly. based on quantum - mechanical viewpoints and the following physical processes and parameters : the two - photo interaction of light with matter, paraxial diffraction of stokes, langevin noise sources, reflection at the faces and the edges of crystals, gain coefficient, beam aperture, pulse width and fluence of 3, the physics model of tsrs in kdp and kdp crystals acting as high - fluence frequency convector and the paraxial operator maxwell - bloch - langevin equations have been built up

    全文共分八章,取得的主要成果及創新點如下: ( 1 )首次建立了諧波轉換晶體的tsrs物理模型本文根據量子力學原理,在考慮如下物理過程和參量的基礎上:光與物質的雙光子相互作用; stokes光的傍軸衍射; langevin (郎茲萬)源;晶體表面反射和端面反射;增益系數、光束口徑、脈寬和三倍頻光能量密度,推導出高通量激光在kdp和kd ~ * p諧波轉換晶體中的tsrs物理模型和上的近軸算符maxwell - bloch - langevin方程組。
  8. 4 ) a uniform crb expression of bearing estimation for spatially distributed sources in unknown noise environments is derived. more exactly, the crb performance of bearing estimation for spatially distributed sources in several typical spatially - correlated noises is evaluated theoretically and numerically, respectively. it is disclosed that the estimated errors mainly depend on space ambiguity between signal and noise components

    4 )推導了未知環境中分佈源波達方向估計的統一的crb表達式,分析了幾種典型的情況下分佈源波達方向估計的極限性能,揭示了信號分量和分量之混疊對分佈源波達方向估計的決定性作用。
  9. This thesis explains the necessity of the character recognition technology of the computer at first, describe the meaning in which the handwritten numeral discerns ; pretreatment technology of handwritten numeral recognition, including two value, line segmentation, word segmentation smooth, removing noising, standardization and thinning are discussed two value concretely discusses whole threshold value, some threshold value, dynamic threshold value and utilize space information to carry on threshold, which are several kinds of common method of choosing threshold value, especially utilize space information to carry on threshold value is describe in detail ; adopting to the foundation of thinning based on mathematics morphology, thinning algorithm of serials same and thinning algorithm of protecting shape are discussed ; afterwards, according to principle ' s diagram of the on - line character recognition, by analyzing the structure feature of the handwritten numeral, this thesis has proposed the online recognition te chnology of the free handwritten numeral based on the stroke feature and the online recognition technology of the free handwritten numeral based on the multistage classifying device. detail narrated noise removing, stroke characteristic definition and discernment, distance criterion of whole word match ; then under the foundation of handwritten numeral segmentation, off - line handwritten numeral recognition is researched. especially minimum distance classifying device, tree classifying device and adaptive resonance ( art ) network classifying device is discussed at the same time, believes degree analyses are introduced to integrate a lot of classifying devices ; at the end, the typical application of the handwritten numeral recognition was briefly narrated, its application in extensive data statistics, financial affairs, tax, finance and mail sorting have been explored

    二值化時對整體閾值二值化、局部閾值二值化、動態閾值二值化和利用信息進行閾值選取幾種常用的閾值選取方法進行討論,特別對利用信息進行閾值選取進行了詳細論述;在對通過對基於數學形態學的細化的基礎上,討論序貫同倫形態細化演算法和保形的快速形態細化演算法;然後依據聯機字元識別原理框圖,分析了手寫數字的結構特點,提出了基於筆劃特徵的任意手寫數字在線識別技術和基於多級分類器任意手寫數字在線識別技術,對其中涉及的筆劃識別前的處理、筆劃特徵量的定義及識別、整字匹配的距離準則進行了詳細敘述;繼而在對手寫數字的分割的基礎下對脫機手寫數字識別進行了研究,對基於最小距離分類器字元識別、基於樹分類器的字元識別、基於自適應共振( art )網路的字元識別分別進行了詳細討論,並引入置信度分析將多個分類器進行了混合集成;最後簡單闡述了手寫數字識別的典型應用,對其在大規模數據統計、財務、稅務、金融及郵件分揀中的應用進行了探索。
  10. For example, the geometric effect and vignetting are simulated with the synthetic method in which they are modeled with ray tracing and then simulated with pixel - based processing. the effects of detector noise on imaging are simulated with the three - dimension model. the theory of pixel transfer function is extended and developed, and microscanned images of four patterns are simulated with good results

    本文具有如下幾個突出特點:用光線追跡法分析建模,而用基於象素處理的綜合方法,模擬了光學系統中的幾何效應和漸暈現象;利用三維模型,模擬了探測器對圖像質量的影響;對象素傳遞函數理論進行了擴展和延伸,給出四種工作模式的微掃描成像系統的象素傳遞函數的具體數學表達式,並利用這些表達式模擬了探測器的效應和微掃描成像的圖像效果。
  11. The extend work of my doctoral research is introduced in the part. problems of cavitation noise are investigated with three methods such as theory analysis, numerical simulation and experiment research. mixed boundary element method is put forward to solve acoustics of bubble collapse by author

    第二部分:研究該部分工作是作者博士期工作的延續,對問題從理論分析方面、數值模擬及實驗三方面進行研究,應用作者提出的混合邊界元方法求解了泡在邊界附近潰滅時的輻射問題。
  12. In the terms of interpolation, the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character. 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation, the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation, the more number of summation and the more order of interpolation polynomial, the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation, the more of reconstruction time simultaneously, aimed at eliminating the effects of noise contained in projection data, in this paper, author analysis cause and effects of common artifacts. importantly, discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector

    在ct圖像重建時,選擇有限帶寬窗有較好的解析度,三角形窗有較好的密度解析度,選擇餘弦窗則使得解析度與密度解析度的折衷;從窗函數的頻譜角度來講,可以用於圖像重建的一個良好的卷積窗函數應該具備以下條件: ( ? )小的3db帶寬b ,即最小的主瓣寬度; ( ? )最小的旁瓣最大峰值a ; ( ? )最大的旁瓣峰值衰減速度d ;就內插函數而言,臨近點內插與線性內插重建圖像大,但有較好的邊緣與細節; 4 4三次內插、三次b -樣條與四次拉格朗日多項式內插圖像平滑,局部特性較好。
  13. Blade design optimization problems are multimodal and discontinuous problems, the use of gradient - based numerical optimization algorithms perform inefficiently and drop into local minimum prematurely. hence, the exploratory algorithms such as gas are required for global exploration. 4

    4 .通過rsm方法擬合復雜的響應關系,平滑設計」 ,能夠防止數值優化方法陷入局部極值點,獲得良好的魯棒性和適應性。
  14. 2, the optimal designed digital matched spatial filter ( dmsf ) was used to perform real - time optical correlation, which not only has the merit of large storage and renewability as well as common digital filter, but also has the virtue of high correlation s / n which the holographic optical filer owns

    2 、優化設計的數字匹配濾波器,既有數字濾波器的大存儲容量並可實時刷新的特點,又有全息光學濾波器高相關s n的優點。對于處于嚴重背景干擾下的多個畸變目標,也可獲得高相關s n 。
  15. By the line of cross - cut, the 2 - d fmm ii with multiplicative noises is transformed into the form of 1 - d model, then the proposed algorithm is obtained on the basis of state estimation theory of the 1 - d systems

    利用斜割支線法,通過定義新的變量,巧妙地將帶乘性的2 - dfmm模型轉化為一維帶乘性的狀態模型。
  16. Though there are many methods in the field of speckle filtering, it lacks deep study of methods selection with different images and in different atr missions

    本文對採用域常用的濾波演算法、時頻率域相結合的濾波演算法濾除sar圖像的結果進行了比較。
  17. Non - uniformity correction approach is one of the key technique in steering focal plane array imaging system

    凝視紅外成像系統中的探測器非均勻性校準(降低固有空間噪聲)技術是一項處在探索過程中的關鍵技術。
  18. First, the thesis introduces the definitions and the attributes of the higher - order statistics. it is insensitive to additive gaussian noise ( white or colored ), which is what we base on to doa problems. then two doa estimation algorithms based on higher - order statistics are presented, one is that forming cumulant matrix pencil used in esprit to estimate doa problems, the other is spectrum estimation method for doa estimation based on the eigenstructure analysis of the fourth - order cumulant, and comparing the effects of the estimation to conventional covariance - based doa algorithms "

    論文首先對高階統計量的定義和性質作了介紹,特別指出了高階統計量對加性高斯(白色或有色)不敏感,這是我們利用它進行波達方向估計的理論依據,然後文中提出了兩種基於高階統計量的波達方向估計方法,一種是利用子旋轉不變技術構造四階累積量矩陣進行估計的方法,另一種是基於四階累積量陣特徵分解的譜估計測向方法,並將它們的估計效果與傳統協方差方法的效果進行比較。
  19. Spatial noise filtering

    空間噪聲濾波
  20. In the view of a civil case on air conditioner noise infringement between neighborhoods, this paper discussed the ambient noise determination methods and standards, and put forward some suggestions to appropriate determination methods and standards for better solution

    從一起鄰里調擾民的民事案件,闡述了居民鄰里調擾民監測方法及執行標準,從實踐體會到,國家應制定更合適的標準和測量方法,以利於處理這類問題。
分享友人