頻率統計 的英文怎麼說

中文拼音 [bīnlǜtǒngjì]
頻率統計 英文
frequency count
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 計 : Ⅰ動詞1 （計算） count; compute; calculate; number 2 （設想; 打算） plan; plot Ⅱ名詞1 （測量或計算...
  • 頻率 : frequency; rate
  • 統計 : 1 （對有關數據的搜集、整理、計算和分析） statistics; census; numerical statement; vital statistic...
  1. The waves should be sheared waves for the anisotropic aeo device and longitudinal waves for the isotropic aeo device. geometrical relationships of anisotropic acousto - optic effect in ln crystal and kdp crystals are studied by tangent - match condition. curves of incident angle vs. abaxial angle, diffractive angle vs. abaxial angle, extreme frequency vs. abaxial angle and acousto - optic merit vs. incident angle vs. abaxial angle are systematically gained and the design parameters are also calculated

    利用相切-匹配條件法研究了鈮酸鋰晶體及kdp晶體的反常聲光互作用幾何關系，系統地得到了以離軸角為自變量的各參數的計算公式及相應的關系曲線，通過數值分析方法給出了聲光優值隨中心頻率的變化曲線並給出了器件的設計參數。
  2. And then facing the problem of the channel estimation of the adaptive modulation system, we conclude out the channel estimation algorithms on maximum likelihood ( ml ) estimation and maximum a posteriori ( map ) estimation under the condition of flat fading channel and selective fading channel in detail. to meet flat fading channel, we simulate the relationship of the ratio between the error covariance in map estimation and ml estimation and pilot symbol message length. the conclusion can be drawn from these results

    接著，對自適應調制系統中的通道估計問題難點，詳細推導了平衰落通道條件下和選擇性衰落通道條件下最大似然（ ml ）估計和最大后驗概率（ map ）估計演算法，針對平衰落通道，我們模擬了map估計和ml估計的方差與導頻符號長度的關系，模擬結果表明，錯誤方差受多譜勒頻率的變化影響最大，並且對實際的自適應調制系統，導頻符號長度的取值超過20個符號長度時， map通道估計明顯優于ml通道估計。
  3. The main contents include : water environment, marine sediment and the trend monitoring of marine life quality ; at the same time, to consolidate the monitoring of the functional zones, such as seashore bathing places, oceanic reserves, marine aquafarms ; to set up the seashell monitoring and controlling zones in the sea areas of both pingtan and yunxiao at the first time ; to carry out the statistical monitoring of polder, exploiting sea sand, spartin aallerni flora, terrestrial sewages, etc., to carry out monitoring of the total quantity of pollutants into the offshore marine areas in the min river, the jiulong river as well as the municipal sewages of xinlin industry in xiamen and jiaocheng in ningde ; to carry out the red tide monitoring in the offshore marine areas of fujian province ; to implement time - lapse, pointing and continuous red tide monitoring of high frequency and high intensity in the sandu gulf, the min river estuary and offshore marine areas of xiamen

    主要內容包括水環境、海洋沉積物和海洋生物質量的全海域環境趨勢性監測，同時加強了海水浴場、海洋保護區、海水增養殖區等功能區監測；首次在平潭和雲霄海域設置了貝類監控區；開展了圍填海、海砂開采、互花米草、陸源排污口統計監測；並在閩江、九龍江、廈門杏林工業排污口、寧德蕉城市政排污口鄰近海域開展污染物入海總量監測；在全省近岸海域開展赤潮監視監測，對三都灣、閩江口、廈門近岸海域赤潮監控區實施高頻率、高密度的定時定點連續監測。
  4. Chapter 4 designs and determines the parameters of the algorithm adopted in the instrument system. analyzes and compares the different effects to frequency estimation when using digital filters with different group delay ; determines the data length, a parameter of frequency estimation ; introduces the method of available judgment of sensing signal and determines the judgment threshold as well

    第四章設計和確定了儀器系統軟體演算法的部分參數：分析和比較了不同群延遲特性的數字濾波器對頻率估計的影響；確定了影響頻率估計參數?數據長度的取值規律；給出了判斷傳感信號有效性的檢測方法並確定了檢測門限的取值規律。
  5. Based on the method, this dissertation deals with several kinds of signals including cosine wave ( cw ), linear frequency modulated ( lfm ) and multi - component signal, furthermore the systematic comparison of estimation effect among cwt and several other usual methods as well cramer - rao bound ( crb ) is given

    基於上述方法，文中分別對單頻矩形脈沖信號、線性調頻脈沖信號以及多分量信號進行了瞬時頻率估計，並與其他幾種常用瞬時頻率估計方法的性能以及crb進行了系統比較。
  6. In this paper, ansys, the software on finite element analysis, is made use of processing the static and modal analysis on the preliminary models and its " modified ones. by analyzing the results, we can conclude that the stresses on the components of the modified models are tended to equilibration and the location of the branches " brace can also influence stresses and translations on the branches. in addition, the values of the intrinsic frequencies on modified models " are larger than the ones on preliminary models, but the ranges of the frequencies on both models are almost same

    傳統的弧形閘門的支臂結構基本上都是三角架式的，這主要是因為按平面體系進行計算的傳統設計方法忽略了結構的整體性及弧形閘門的空間結構特點，設計得比較保守，而實際上，將其改為a型結構也存在可行性，本文是利用有限元分析軟體? ? ansys對原模型及修改模型分別進行靜態和固有頻率的計算，通過分析比較其結果可知，支臂改為a型后會使閘門的整體受力趨于均勻，即原模型受力大的部件其應力變小，而原模型受力小的部件其應力會變大；而且a型支臂的支桿在不同的放置位置對支臂的應力和位移變化也有一定的影響。
  7. 3. the dissertation proposes the extended kalman filter based to estimate the fundamental symmetrical component of the ps and the frequency while the frequency is unknown

    在電動機變頻調速系統的頻率未知條件下，給出了基本正序對稱分量和頻率估計的擴展卡爾曼濾波方法。
  8. Aiming at the lower performance and floor effect of the traditional orthogonal frequency division multiplexing channel estimation, the ofdm channel estimation algorithm based on wavelet recursive least square support vector machine ( wrls - svm ) is proposed

    摘要針對傳統多徑衰落下的ofdm導頻通道估計性能低下，地板效應的缺陷，提出了基於導頻的小波遞歸最小二乘支持向量機（ wrls - svm ）時變通道頻率估計演算法。
  9. Up to january 2005, the unique and growing corpus contains over 150 million chinese characters and over 720, 000 word types, and is still expanding. the centre has launched a bi - weekly

    Livac所建立的是一個包括字詞條文句全文等不同層次的語料庫，可對個別字或詞的使用作查詢頻率統計比較。
  10. In order to add the resource collected by nerms resource collecting system to database according to its content, we must give a label for each resource. if we just do the work one by one manually, we will find it ' s a tedious job and we must find a new tool to help us, so the resource classifier l

    本文提出一個頻率統計函數，一個基於頻率的分類規則適應度函數以及一個用於分類的打分函數，並把這三個函數結合適用於粒子群演算法的分類規則編碼來更準確的提取規則集，然後通過修改粒子位置更新方程使粒子群演算法適于解決分類規則挖掘問題。
  11. This article introduces the basic principle of the testing method and the composition of the testing system

    介紹這種測試方法的基本原理和測試系統的組成，給出了測試用金屬梁因有頻率的計算方法和測試方法。
  12. The theory of soplat using frequency rate is discussed in chapter 2. based on this theory, this chapter studies the observed discrete - time signal. the crlb of continuous wave and coherent pulses frequency estimation are also studied

    論文第二章討論了利用頻率變化率的單站無源定位原理，在此基礎上，介紹了單站無源系統中接收信號的模型，並分析基於各模型的頻率估計的cramer - rao下界。
  13. Traditional statistics - based approach utilizes a stationary model, in which anomaly value is calculated according to events frequencies in history

    傳統的基於概率統計的方法採用的是靜態模型，即根據歷史上事件出現的頻率來計算新事件的異常值。
  14. 2. analyzed, simulated the effect of maximal value estimate method, coherent accumulating on ranging performance

    2 .分析並模擬了頻率估計的最大值估值演算法和相干積累對系統測距性能的提高。
  15. So a new method is proposed that combines the traditional transfer function and coherence function analysis with the statistics of frequencies to obtain the dominant frequencies, which can reflect how the noise sources influence the bus interior noise level in frequency domain, and which will provide reliable references to make up plans in reducing the bus interior noise

    對此提出了在傳統的傳遞函數和相干函數分析的基礎上結合頻率統計，選出優勢頻率的方法來考察噪聲源對車內噪聲的影響，為制定客車車內噪聲治理方案提供了可靠的依據。
  16. A time - frequency analysis method is presented to solve paper machine press section bearing vibration signals of unstable and complication, applying wavelet function to the unstable signals for faulty bearing according to paper machine press section roll bearing characteristic, and process the vibration signals by means of decomposition and reconstruction, obtaining the vibration signals in different frequency bands, the statistic in frequency domain of relevant frequency bands is served as monitoring feature

    摘要針對紙機壓榨部滾動軸承尺寸大響應弱、運轉速度低、低頻信號容易淹沒、調制源多、振動信號非平穩性等特點而導致常規的傅立葉分析診斷故障效果不佳的情況，提出了一種應用小波變換的時頻分析方法，對振動信號進行分解和重構處理，獲得了振動信號在不同的頻段的分量，提取相應特徵頻段重構分量的功率譜的頻域統計值作為特徵參數，從而實現對軸承故障診斷。
  17. Chapter 5 introduces the flow process chart of the instrument system ; evaluates the performance of frequency estimation in the system ; measures the resonance frequency of one - port saw resonator at different temperature

    第五章給出了儀器系統軟體演算法的工作流程；對該系統的頻率估計性能做了初步評估，並通過溫度實驗測試了單埠saw諧振器型傳感器的溫度?頻率特性。
  18. These control ways include fuzzy evaluation, the method of fha, the theory of grey forecast and control diagram, etc. the application of these control methods obviously reduced the ratio of waste web, enhanced the process quality and, ameliorated the whole quality management system and increased the customers " satisfaction

    本論文在對蕪湖華辰公司聚酯網生產過程質量控制現狀進行分析的基礎上，針對影響過程質量的主要因素提出了一整套的控制方法，這些方法包括模糊評價、 fha （頻率統計分析）法、灰色預測理論、控制圖等。
  19. Then the threads in segmenting document into different topic is introduced, which includes statistical methods and semantic network. then, the rocchio model characteristics in text filter are analyzed

    然後，介紹了根據不同線索將文本中不同子主題切分的技術，這些線索包括詞義網路和各個段落關鍵詞出現的頻率統計，並指出它們各自的優缺點。
  20. " level 01 " to " level 20 " are defined by frequence. if you are a high school student, you can select " level 01 " commonly ; if you are a college student, you can select " level 01 " to " level 03 " commonly ; under high school can select basic words

    詞匯級別中的level 01 level 20是根據單詞出現的頻率統計的，如果你是高中水平，選擇level 01一般沒有問題，如果是大學水平，一般可以選擇level 01 level 03 ，高中以下水平可以選擇基本詞匯。
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