likelihood function 中文意思是什麼

likelihood function 解釋
概率函數
  • likelihood : n. 1. 可能（性）。2. 【數、統】似然，似真。3. 〈古語〉希望，前途。
  • function : n 1 功能，官能，機能，作用。2 〈常 pl 〉職務，職責。3 慶祝儀式；（盛大的）集會，宴會。4 【數學】...
  1. An expression on likelihood function of normal distribution ma sequence

    序列的似然函數的一種表示
  2. The communication system ' s performance is briefly analyzed by channel capacity, which is a function of bit error rate ( ber ). the decision rule is based on the most likelihood method. for reproducing the original binary signals more correctly, time scale transformation method and the approach of ensemble average probability of error bits are introduced

    通過理論分析和模擬實驗，本文研究了這個非線性數字通信系統性能，給出了誤碼率和通道容量公式，提出了系統參數調節方法，採用最大似然法設計了適合這個系統輸出的判決規則。
  3. The paper emphasesd on the following issues : integrating network topology automatic discovery and network performance monitoring into an uniform web environment via activex control technique. constructing a hierarchic network monitor system based on distributed data replication technology via sql server replication function. analysising the relation between network usability, error and discard rate consequently to find out a formula, which can be used to calculating the congestion likelihood and setting the threshold for alerting the congestion situation

    論文重點論述了以下幾個問題：採用控制項技術，使網路性能監視、網路拓撲的自動發現集成在統一的web平臺上；運用sqlserver的復制功能，構造一種基於分佈數據復制技術的層次式網路監視系統；對網路利用率、出錯及丟棄百分比信息進行分析，找出它們在推算擁塞可能性時的量化公式，並應用於閥值設置，以實現對擁塞可能性進行預警；研究分析在不同范圍內的拓撲發現工具及演算法，並針對系統需求設計實現一種域內分級式網路拓撲發現演算法。
  4. So the likelihood function of the differential phase peaks can be formed as means to identify m - ary psk

    於是可利用相位突變峰值的似然函數來識別信號為哪一種進制的psk信號。
  5. Maximum likelihood function

    最大概似法
  6. This paper abstracts financial transaction characteristics, describes ultra - high - frequency data with marked point process, defines transaction process intensity to present both transaction time interval changes and marks changes, derives sample function density and its maximum likelihood estimating formulation

    本文通過抽象交?過程的特點，把成交時點變化用隨機點過程描述，把價格成交?等看作為成交時點上的標值，用標值隨機點過程描述交?過程。
  7. Log likelihood function

    對數概似函數
  8. The strong deviation theorems are new type theorems established by using the notion of the likelihood ratio. professor liu wen frist applied an analysis method in solving a class of strong deviation theorems for a sequense of random variables. later professor liu wen studied the shannon - mcmillan theorem in information theorems [ 2 ] - [ 8 ] and deviation theorems of non - negative continuous random variables [ 10 ] - [ 11 ] by using the analytic technique and obtained some strong deviation theorems. the chapter 2 of the paper studied a class of strong deviation theorems of function of two variables of information sources and obtained a further study of shannon - mcmillan theorem of markov information sourses by definning the using concept of entropy density divergence. the chapter 3 of the paper studied a class of strong deviation theorems of non - negative continuous random variables by using tool of transformation of laplace. information theory, as a branch of applied probability theory, becomes more and more important in appling

    劉文教授在解決大數定律中，用首創的分析方法得到一類隨機變量序列的強偏差定理。后來，劉文教授把分析方法用於信息論中shannon - mcmillan定理和連續型隨機變量的偏差定理的研究，得到了若干強偏差定理。本文的第二章是引進任意信源相對熵密度偏差的概念，並利用這個概念研究任意信源二元函數的一類強偏差定理，得到了馬氏信源shannon - mcmillan定理的一個推廣。
  9. The endurance function of the insulation field is widely concerned in the power system. according to the equality between the two dimensional weibull distribution and the law of electrical aging, after the method for estimation of the voltage endurance coefficient is presented by the maximum likelihood estimation and the minimum square estimation of the two dimensional weibull distribution parameters, on the basis of the analysis of the test disadvantages under invariable voltage, the method of obtaining the voltage endurance coefficient under the intension increased by degrees is considered

    電氣絕緣電老化性能是電力系統普遍關注的問題，由於二元weibull分佈與電老化定律在評價絕緣老化特性上存在等價性，本文首先介紹了二元weibull分佈參數採用極大似然法和最小二乘法估計獲得電壓壽命指數的方法，同時在分析其在恆定電壓下試驗容易出現，由於電壓選擇不當導致試驗時間過長現象的基礎上，討論了利用場強遞增方式確定電壓壽命指數的方法。
  10. An appropriate cost function is constructed which avoids the use of the logarithm likelihood function that is lack of robust to the noise correlation, moreover, our method have many advantages such as, low complexity, suitable for coherence signals, etc

    構造適當的代價函數，避免了對數似然函數的使用，該方法對色噪聲協方差矩陣特徵值分散具有穩健性，同時具有較低的計算復雜度和適用於相關甚至相干源等優點。
  11. We construct cost function which combines the likelihood function and boundary constraint function

    它利用似然函數和邊界約束方程構造代價函數，來描述區域特徵。
  12. By the help of matrix and difference equation, we give an expression of likelihood function of normal distribution ma ( 0, 1 ) sequence, which has important application in mordem control theory

    藉助矩陣和差分方程，具體給出了在實際中具有重要應用的一類數學模型? ?正態ma （ 0 ， 1 ）序列的似然函數的一種顯式表示，即具體表示成了模型參數的函數
  13. Taking attributed scattering center - based classification as example, the computation of feature likelihood function under many - many and 1 - 1 correspondence are studied, by using the algorithm of bipartite graph perfect matching to find the optimal 1 - 1 correspondence, the computation efficiency is improved greatly, the relations of likelihood function between 1 - 1 and many - many correspondence are analyzed, and two sub - optimal methods of calculating the likelihood function of 1 - 1 correspondence are presented

    本章以基於屬性散射中心特徵的分類為例，深入研究了多?多對應和1 ? 1對應特徵似然函數的計算，通過將求解二分圖最佳匹配的演算法用於尋找特徵之間的最優1 ? 1對應關系，有效提高了1 ? 1對應特徵似然函數的計算效率，分析了1 ? 1對應和多?多對應特徵似然函數之間的關系，給出了兩種次優的1 ? 1對應特徵似然函數計算方法。
  14. The 3 - d exact maximum likelihood registration algorithm ( eml ) incorporates the effects of measurement noise. the registration estimates are obtained by the maximum likelihood function of the sensors measurement. the simulation results indicate that the estimates of registration errors have better consistency and stability

    三維精確極大似然法（ eml ）考慮了量測噪聲的影響，配準估計是通過求最大似然函數獲得的；模擬結果表明：配準誤差具有很好的穩定性和一致性。
  15. Computation the likelihood function requires using the correspondences between extracted and predicted features

    為了計算該似然函數，需要利用提取特徵矢量和預測特徵矢量之間的對應關系。
  16. The model - based sar target classifier that uses feature accomplishes classification by computing the likelihood function between extracted and predicted features

    利用特徵基於模型的sar目標分類方法，通過計算提取特徵矢量和預測特徵矢量之間的似然函數達到目標分類的目的。
  17. However, as the mle requires obtaining the parameters of the high order non - linear likelihood function when it reaches the global maximum, this makes the mle approach has very huge calculation burden

    但是，由於最大似然方法需要求解一個高度非線性函數在取得最大值時的參數，使得該方法的計算量是十分巨大的。
  18. Considering that the optimization algorithm based on gradient information is powerless in multivariate garch modeling, we use genetic algorithm to optimize the likelihood function of multivariate garch model

    針對傳統的基於梯度信息的優化演算法在多元garch模型估計中的不足，將遺傳演算法引入多元garch建模研究，給出了演算法設計。
  19. It follows from the general convergence theory that the em algorithm generally converge to a local maximum solution of the likelihood function and cannot be guaranteed to converge to a correct solution, i. e., a consistent solution of the samples

    Em演算法的一般收斂理論認為，演算法只能收斂到似然函數的一個局部極大解，無法保證能夠收斂到與樣本的真實參數相一致的解上。
  20. Based on analysis of synchronization techniques in ofdm, this dissertation present a ml arithmetic to estimate time and frequency offset using symmetrical & conjugate prefix. the correlation peak of likelihood function curve is very sharp according this arithmetic, so the symbol synchronization by this arithmetic is exacter than that by general arithmetic using cycle prefix

    文中在全面分析ofdm同步技術的基礎上，提出了利用對稱共軛前綴的最大似然估計法來進行符號定時和頻偏估計，相對于傳統的利用循環前綴的最大似然演算法，這里提出的演算法可以獲得尖銳的相關圖樣，定時精度高，頻偏估計誤差小。
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