樣本協方差 的英文怎麼說

中文拼音 [yàngběnxiéfāngchā]
樣本協方差 英文
sample covariance
  • 樣 : Ⅰ名詞1. （形狀） appearance; shape 2. （樣品） sample; model; pattern Ⅱ量詞（表示事物的種類） kind; type
  • 本 : i 名詞1 （草木的莖或根）stem or root of plants 2 （事物的根源）foundation; origin; basis 3 （本錢...
  • 協 : Ⅰ形容詞（共同） joint; common Ⅱ動詞（協助） assist; help; aid
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 差 : 差Ⅰ名詞1 （不相同; 不相合） difference; dissimilarity 2 （差錯） mistake 3 [數學] （差數） differ...
  • 樣本 : sample book; specimen; advanced copy; sample; muster; scantling; instance; statistics
  • 方差 : dispersion
  1. It has its own basic features in its approach, that is, giving full consideration to the diversity of its members and acknowledging their divergence at the level and stage of development as well as the consequent differing interests and needs ; laying emphasis on flexibility, step - by - step progress and openness ; adhering to such principles as equality and mutual benefit, consensus, seeking common ground while putting aside differences as well as voluntarism ; and combining individual with collective actions

    它的運行方式具有自己的基本觀點，這就是：充分尊重各成員的多樣性；承認成員之間發展水平和發展階段上的差異及其帶來的不同利益與需求；強調靈活性、漸進性和開放性；遵循平等互利、協商一致、求同存異、自主自願的原則；實行單邊行動與集體行動相結合。
  2. On " apec approach ", president jiang pointed out that apec has its own basic features in its approach, that is giving full consideration to the diversity of its members and acknowledging their divergence in the level and stage of development as well as the consequent differing interests and needs ; laying emphasis on flexibility, step - by - step progress and openness ; adhering to such principles as equality and mutual benefit, consensus, seeking common ground while putting aside differences as well as voluntarism ; and combining individual with collective actions

    關于" apec方式" ，江主席指出， apec的運行方式具有自己的基本特點，這就是：充分尊重各成員的多樣性，承認成員之間的發展水平和發展階段上的差異及其帶來的不同利益與需求強調靈活性漸進性和開放性遵循平等互利協商一致求同存異自主自願的原則實行單邊行動與集體行動相結合。
  3. If the covariance stationary processes are one dimension, for given data, covariance function and spectral density function can be estimated, and there is no need to select kernel function and its parameters

    如果協方差平穩隨機過程的狀態是一維的，對給定的樣本點，給出了協方差函數的估計和其對應譜（密度）函數估計，而不必選擇核函數及其參數。
  4. For the given sample points, and matrix formed by covariance function with sample points as parameters, when the number of sample points approaches infinite, it is proven that this matrix spectrum will approach the spectral approach theorem for positive - definite kernel of integral equation

    對給定的樣本點，由樣本點為變量的協方差函數構成的矩陣，當樣本點個數趨于無窮大時，證明此矩陣譜逼近於積分方程正定核的譜逼近定理。
  5. Under ideal conditions, adaptive array signal processing methods can get excellent performance and adaptive beamformers provide an improvement in array output signal - to - interference - plus - noise - ratio ( sinr ) in comparison with conventional beamforming. in practical operating circumstances, the performance of adaptive array signal processing methods degrade extremely due to existing errors

    但是，在實際系統中總存在有誤差，包括自適應訓練樣本有限次快拍引起的協方差矩陣的估計誤差和各種系統誤差，誤差使得實際陣列流形與理想陣列流形存在差異，這時自適應陣列信號處理的性能會急劇下降。
  6. The energy density in either the male or female at the spawing was not different significantly from that at the spent, which suggested that the energy expended in the spawing might be mainly supplied by ingested food in this fish

    們的直線回歸方程的協方差分析，可將雄性5個樣本的回歸方程合併為一個公共方程作為。預測雄性魚體能量密度（ en ）的模型：巳4 33 。
  7. Then, this paper empirically tested the validation and predictive accuracy of different var risk management model in the domestic financial market. finally, with the analysis of modem financial risk management development trend and the current domestic financial risk management situation, this paper made a prospect for the application of this model in the construction of domestic financial risk management system. through the analysis, the main conclusions are as follows : ( l ) the traditional mean - variance model is the special example of the portfolio selection based on the var risk management model for the case that the returns of the portfolio are assumed to be normally distributed ; compared with the mean - variance model, the var risk management model is more comprehensive and accurate in the measurement of the portfolio risk, so based on the var model, the investors can allocate the asset more effectively. ( 2 ) the var risk management model can provide the timely and comprehensive risk information for the top risk manager, so it is very helpful to the improvement of total risk management efficiency. ( 3 ) based on the var model, the raroc performance valuation approach can reflect the real performance of the portfolio manager and provide the coherent standard for the allocation of risk limitation and the construction of the incentive compatibility constraint mechanism in the financial instiutions

    通過研究分析，本文主要得出如下結論： （ 1 ）傳統的markowitz均值? ?方差模型僅僅是在資產組合收益率正態分佈假設條件下基於var風險管理模型進行資產組合選擇的特例，與均值? ?方差模型中的方差風險度量方法相比， var風險管理模型能夠更全面、更貼切地衡量資產組合的風險，且基於此模型能夠更有效地進行資產配置決策； （ 2 ） var風險管理模型能夠滿足更高層次風險管理者對風險信息的需求，有助於整體風險管理效率的提高； （ 3 ）基於var風險管理模型的raroc績效評價能夠反映資產組合管理人的真實業績，從而為金融機構風險限額的分配和激勵約束機制的制定提供統一的標準； （ 4 ）國內證券市場資產組合收益率服從正態分佈的假設明顯不成立，實證檢驗表明基於資產組合收益率正態分佈假設條件下的方差? ?協方差模型對國內資產組合風險的預測存在較大的偏差，由於文中證明在收益率正態分佈假設條件下基於方差? ?協方差模型進行資產組合選擇的結果等價于markowitz的均值? ?方差模型，因此，均值? ?方差模型對國內資產組合風險的預測同樣會存在著較大的偏差，而半參數var風險管理模型則能夠取得較好的預測衡量效果； （ 5 ） var風險管理模型符合未來金融風險管理的發展趨勢，基於var風險管理模型建立內容提要風險限額內控體系、風險信息披露體系和業績評價體系，並進行金融監管，將有助於國內金融機構內部風險管理方法和外部監管技術跟上國際金融風險管理的發展潮流。
  8. In this paper, overall design philosophy and measure while diagonose the prefabricated substation using ann theory are defined, including the definition of fuzzy expression method for fault symptoms, the definition of typical fault collection and typical fault sign collection, the definition of the format of the learning sample and test sample, and the definition of fault diagnosis model formed in coordination by multi ann whose diagnosis principle are also described. a practical software using visual c + + 6. 0 and access2000 as developing instrument are developed on the basis of diagnosis principle put forward by this paper

    本文確定了應用神經網路理論對箱式變電站進行故障診斷的總體設計思想和步驟：確定了監測數據的預處理模糊化方法；建立了箱式變電站典型故障集和典型故障徵兆集；確定了學習樣本的格式，完成了學習樣本的生成；確定了神經網路結構和參數，並對學習樣本應用本文的學習演算法進行了學習訓練，使誤差控制在給定范圍內；以集散監測診斷系統的思想，提出了由多個神經網路協同構成的多神經網路故障診斷模型，並論述了其診斷原理。
  9. In this paper, an improvement is made through selecting a group of normal orthogonal vectors in feature subspace, to generate large amount of virtual training samples

    摘要在模式特徵子空間中選取一組標準正交向量，使用這組向量可以生成大量的虛擬訓練樣本，從而實現對協方差矩陣的優化。
  10. First, using the scale - invariant property of multiscale model, i. e. markovian among scales, a method of qth - order tree - based for multiscale representation of a class of 1 - d stochastic process is presented. the multiscale stochastic model is established. the representation forms of parameter matrices, such as, the state transition matrix, the disturbance matrix, the initial state and the corresponding covariance matrix are deduced in detail

    本文在已有工作的基礎上，開展了以下幾個方面的研究工作： 1 、根據多尺度模型尺度不變性，即利用尺度間的markov性，給出了一類1 - d隨機過程基於一般q階樹的多尺度表示方法，建立了相應的多尺度動態模型，詳細推導了多尺度模型中的狀態轉移陣、擾動陣、初始狀態和相應的協方差陣，並通過計算機模擬給出了不同階樹的多尺度采樣路徑。
  11. The innovation of this paper is concentrate the merit of the above two recommendation technology, namely, it is a hybrid method that use the conception of customers ’ preference and weighed clv, and what is joited is to use the conception of threshold, so it can be settled on the joit of the two method and avoid the error of use the two recommendation seprately. in this hybrid method, we can firstly identify the loyalty of researched customer use clv, what is mean is firsly the wrfm technology is used to classify and secondly identify the customer is high loyalty or not, if he belongs to the

    本文的創新點正是集中以上兩種推薦技術的優點，使用了基於客戶偏好的協同過濾和基於加權的客戶生命周期值兩種理論形成的混合推薦方法。這種方法在兩種技術的結合點上採用了「閥值」的概念，這樣就很好地解決了兩種方法的中間過渡並且有效避免了兩種推薦方法單獨使用時的偏差。
  12. First we construct a covariance matrix from sample images, then compute the eigenvalues and corresponding eigenvectors of the covariance matrix, construct a feature matrix with the eigenvectors. then every images in database can be projected into the feature matrix and gain a projection vector, so does the input image. then we can judge the resemblance between input image with each image in database by computing the distance between their projection vectors

    我們首先根據採集的樣本圖像構造一個協方差矩陣，然後求取該矩陣的特徵值，以這些矩陣特徵值對應的特徵向量構造出一個特徵空間，然後將輸入圖像向該特徵空間映射，將獲取的映射系數與樣本庫中圖像的映射系數進行距離計算，根據計算出的距離判定輸入圖像與樣本圖像間的匹配程度。
  13. First we construct a covariance matrix from sample images, then compute the eigenvalues and corresponding eigenvectors of the covariance matrix, construct a feature matrix with the eigenvectors. then every image in database can be projected into the feature matrix and gain a projection vector, so does the input image. then we can judge the resemblance between input image with each image in database by computing the distance between their projection vectors

    然後，根據採集的樣本圖像構造一個協方差矩陣，求取該矩陣的特徵值，以這些矩陣特徵值對應的特徵向量構造一個特徵空間，將輸入圖像向該特徵空間映射，計算獲取的映射系數與樣本庫中各類圖像的映射系數的歐基里德距離，根據計算出的距離判定輸入圖像與樣本圖像間的匹配程度。
  14. The covariance of the training samples which are sampled from the antenna arrays is delivered into svm training machine after transformed suitably, then we use svm regression on the unknown samples according as the trained machine for getting the source location

    把陣列天線採集的訓練樣本的協方差矩陣進行適當變換之後送入svm訓練器進行學習，然後根據這個學習機對未知樣本進行svm的函數擬合，得到信源方向。
  15. Through text annotation, the findings show that : ( 1 ) it is the flexibility and diversity of learning ways in the university that lead to two different evaluated criteria to learning that caused students ' cognitive discord ; ( 2 ) the subjects avoided the conflict of the two criteria in three ways : the first was redefining the " learning " ; the second was positive attribution to poor score ; the third was involving a new cognitive factor - interest

    在對所獲文本信息進行了深入分析和詮釋后得到以下結果： （ 1 ）由於大學學習方式的靈活多樣性，導致了學習效能評價中出現了內部評價標準和外部評價標準的分離，引發認知失調； （ 2 ）被訪女大學生通過三種途徑協調兩種評價標準之間的矛盾：重新界定「學習」 ，引申出兩種學習觀；對較差的學習成績進行積極歸因；引入新的協調認知的因素興趣。
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