指數近似 的英文怎麼說

中文拼音 [zhǐshǔjìnsì]
指數近似 英文
exponential approximation
  • 指 : 指構詞成分。
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
  • 指數 : 1. [經] （比數） index number; index 2. [數學] exponent
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  1. Thirdly, there is a preferential path for dispersion flow near the percolation threshold ; fourth, the longitudinal dispersivity is scaled with grid length

    由於在逾滲閾值附近，網格可視為近似分形結構，對二維網格，縱向彌散系數和尺度之間存有指數增加關系
  2. Based on many references, a evaluating function is proposed with performance index of hall call waiting time ( hwt ), people number in a car, energy consuming. the statistic approximation algorithm for hwt is introduced, based on the analysis of elevator traffic state, the calculation of traveling distance and stop number is explained in detail in the thesis. according to the characteristics of the elevator, a group of elevator teaching signals are constructed, by which the weight coefficients are trained according to the widrow - hoff rule

    本文在借鑒了大量的文獻基礎上，提出以平均等候時間、轎廂人數、能源消耗為性能指標的評價函數；詳細介紹了乘客待梯時間hwt的統計近似演算法；基於對電梯交通狀況的分析，對停層次數和運行距離這兩個重要參數的計算進行了詳盡的介紹；依據電梯運行特性參數，構造一組電梯運行教師信號，並採用神經網路的widrow - hoff學習規則訓練權系數。
  3. The normalized factorial moments ( nfm ) show good scaling properties in isotropical partition of phase space ; the nfm ' s projected into three directions versus the. partition. number appear, to be saturated curves with similar in scaling behavior ; and the three hurst exponents are very close to unity. the levy - stability holds for the q = 2 ~ 5 order moments in 3 - dimensional phase - space

    發現：三維歸一化階乘矩（ nfm ）的分佈呈現出很好的標度特性；階乘矩在各個方向上的一維投影呈現出彼此十分相似的飽和曲線，且特徵參量hurst指數都接近於1 ；高維相空間各階階乘矩的分佈滿足l vy穩定性的要求。
  4. It is proposed that a new estimator of the extreme - value index when it is negative that is similar in form to the pickands estimator. its consistency and asymptotic distribution is established

    提出一類極值指數為負時的相似於pickand s型的新的極值指數估計量，並建立它的相合性及漸近分佈。
  5. The method of sds - page was used to analyse the electrophoretic band of their seeds, and compare corydalis adunca maxim. living in gannan area with three kinds of corydalis straminea maxim living in different environments. by the principle of the higher of the similarity index of protein, the similarer of their blood relationship, author thought corydalis adunca maxim. living in gannan is the similarest with corydalis straminea maxim living in lunzhong area. then analysing the alkaloids in corydalis adunca

    對這兩種紫堇的種子進行了sds ? page凝膠電泳分析，根據蛋白質圖譜，比較了甘南灰綠黃堇與三種不同產地的草黃堇的蛋白質相似度指數，依據相似度指數越高，種間的親緣關系越接近的原則，認為甘南灰綠黃堇與隴中草黃堇的親緣關系較近。
  6. Secondly, the effectiveness and limitation of the classical perturbation, such as the method of multiple scales and the poincare - lindstedt method, are discussed in detail through a duffing oscillator with delayed velocity feedback. it is shown that the two perturbation methods are effective only in solving the approximate solution of the first two orders. an ambiguity or paradox will be encountered when they are used to seeking for the third or higher order approximation of solution

    其次，以一具有時滯速度反饋的duffing系統為例，研究了經典攝動法如多尺度法， poincar - lindstedt法等在求解時滯微分方程級數解時的適用性和局限性問題，指出利用這些方法只能有效求得系統的前兩階近似解，而在求系統的三次以上近似解時會出現矛盾或二義性。
  7. The change of the micro - hardness along the radial direction approximately coincides with the exponential decay, that is at the edge of the crater the hardness is the highest and decreases with the increase of the distance from the crater and to the normal value at last

    彈孔側壁硬度的徑向分佈近似符合負指數規律，即在緊鄰側壁處，材料因劇烈變形而強化，隨到側壁距離的增加，硬度值降低，直至降到基體材料硬度水平。
  8. The frontier production function, a parametric function of any form, can be estimated by sample data. this study shows that the projected panel data, which is the inputs and relative exponential maximum output data set, obtained by conducting the data envelopment analysis with the log inputs and output, is approximately piecewise cobb - douglas under a certain assumption

    根據前沿生產函數的定義，本文利用投入產出的對數形式和數據包絡分析方法求出了相對指數最大產出，並證明了在一定的條件之下，這種數據結構即所謂的支撐面板數據具有分段近似cobb - douglas性。
  9. Abstract : the sample breakdown point of a test is defined as the smallest proportion of arbitrary outlier in the sample that reverses the test decision. in this paper, wegive the sample breakdown point of a test for maximum likelihood estimate of exponential distribution parameter and analyze the asymptotically normal characteristic of the sample breakdown point

    文摘:如何量化一種統計方法對異常值的不敏感性一直是穩健統計研究的一個重要課題.檢驗的樣本崩潰點是樣本中能逆轉判決的離群值的最小比例.在研究相關文獻的基礎上，計算出指數分佈參數極大似然估計檢驗的樣本崩潰點，並分析了樣本崩潰點的漸近正態性，為量化統計方法的穩健性提供了一種新的途徑
  10. For viscous shock waves c, by the spectral analysis we prove that in l2 ( r ) space the essential spectra and the eigenvalues ( except the simple zero eigenvalue ) of the linearized operator have negative real parts, thus we show that the viscous shock waves c is locally asymptotically exponentially stable in l2 ( r ) space

    對粘性沖擊波c利用類似方法，我們證得在l ~ 2 （ r ）空間線性化運算元的本質譜和除簡單特徵值零以外的特徵值均具有負實部。於是，我們得到粘性沖擊波c在l ~ 2 （ r ）空間的局部漸近指數穩定。
  11. The frequency analysis results show conclusions as follows : 1. the relative valid spectral power is declined with the volume percentage of inclusions in terms of exponent curve and the tendency of negative direction is same to that of forward direction

    當ly12鋁合金細小夾雜物（小於0 . 16mm ）的體積百分數從0 0 . 35時，在35 50mhz的頻帶范圍內，超聲波形的有效譜功率按近似指數曲線快速下降，沿相反方向檢測時其變換趨勢相同。
  12. It simulates human ' s behavior in the process of conventional experiential quotation, and quantifies the useful information of a new die part and a series of correlative die samples accumulated in the foregone quotation experience by fuzzy membership, and then compares the similarity between the new part and the samples after computing their fuzzy level of approximation to find three of the most similar samples, based on which the producing cost of the new part is estimated by exponential - smoothing - method

    本文提出的模糊相似比較法和工時法相結合的模具報價方法，就是模擬傳統的經驗報價中人的報價行為過程，利用模糊理論中的模糊隸屬度來量化新工件與原有的在以往生產實際中積累的一系列相關模具樣本的有用信息，計算它們之間的模糊貼近度，進行相似度比較，找出與新工件最相似的三個模具樣本，在此基礎上利用預測技術中的指數平滑法估算出新工件的生產成本。
  13. So, we put forward an optimized exponential algorithm in which the multiplication with itself was substituted mostly by square. through expanding of composition fields, the time consuming of optimal algorithm is, where n is the number of bits of exponential

    通過對演算法的分析我們可以得出結論，隨著復合域的不斷增大，域上指數運算所需的時間可近似表示為，式中n為指數以二進製表示時的比特串長度，為域元素進行多項式相乘所需的時間。
  14. In the analysis process, the six main peaks in 88 - 100 kev region, including the y peaks of 234th, the k peaks of th and the k peaks of u, are chosen. the smoothly joined gaussian function and low energy exponential tail is taken as peak shape function and quadratic polynomial is taken as background function. the two functions are fitted to gether to calculate the peak area

    在分析過程中，選擇了88 - 100kev能區的~ （ 234 ） th的射線峰， th的k _射線峰以及u的k _射線峰共六個主要能峰，通過採用高斯函數和低能指數尾部光滑聯接的峰形函數和二次多項式本底函數一起擬合，來求出峰面積；而該能區所有能峰的探測效率可以認為是近似相等的，由此得到鈾富集度。
  15. The results show that the mass absorption coefficient is nearly exponent decay with the gamma energy, the less energy of gamma ray, the more probability of absorption in the iron sphere

    結果表明，隨著射線能量的增加，質量吸收系數近似呈指d一t中子穿透鐵球伴生y射線泄漏能譜實驗研究數衰減， y射線能量越低，被鐵原子核吸收的幾率越大。
  16. After the discussion of the algorithm of complexity parameters, lyapunov exponent and apen, the pressure fluctuation in fluidized beds is analyzed quantitatively. the effect of different operating conditions, such as variant gas superficial velocities, axial positions and static bed heights, is discussed

    在討論復雜性參數、 lyapunov指數、近似熵的演算法基礎上，對流化床壓力脈動進行定量分析，討論了表觀氣速、軸向位置、靜床高等不同操作條件對混沌特徵參數的影響及其對應的動力學規律。
  17. We reconstructed the phase space and calculated the nonlinear parameters such as correlation dimension, the largest lyapunov exponent, approximate entropy, and l - z complexity of the data. it can be conclud from the results that the reconstruction of heart beat rate signal is strange, its correlation dimension is between 5 to 7 and have the character of fractal dimension, its largest lyapunov exponent is larger than zero, its approximate entropy and l - z complexity are obviously differ from noise. we can draw a conclusion from all above : the heart beat rate signal is n ' t simple noise, it is high dimensional chaos obeys certain dynamical law

    我們還對信號進行了相空間重構，計算了信號的關聯維數、最大lyapunov指數、近似熵和復雜度這幾個非線性特徵量，我們發現，心率信號的吸引子是奇怪吸引子，關聯維數介於5到7之間，具有分維的特徵，其最大lyapunov指數大於0 ，其近似熵值和復雜度值明顯區別于噪聲，這說明心率信號不是隨機噪聲，它是服從確定性動力學規律的高維混沌信號。
  18. At first, construct ten sets of surrogate data for each emg data, then calculate the correlation dimension ( dcorr ), correlation time, maximum lyapunov exponent ( a, ), l - z complexity and approximate entropy ( apen ) of both the original emg data and surrogate data, and then compare them

    構造這四例肌電信號的代替數據（各十組） ，分別計算原數據及其代替數據的關聯維、關聯時間、最大李雅普諾夫指數、 l - z復雜度和近似熵，我們發現，四例原數據的以上所有特徵量都與各自所對應的十組代替數據存在明顯差別。
  19. So, it is main problem that set up mathematic model for ship motion simulation. however, the calculating definition of maneuverability motion depends on the hydrodynamic derivatives. for this reason, the purpose of this article is : apply newly hydrodynamic derivatives formula to calculate hydrodynamic forces and offer the ship maneuverability index during the design stages

    因此，本文的研究目的是：運用最近提出的水動力導數近似估算公式，獲得較為精確的水動力計算，為船舶工程人員在船舶初始設計階段提供使用工具，使他們在設計時就能較準確地獲得實船操縱性能指標。
  20. Then, based on the analysis of the combined forecasting precision sequence, the paper simplifies the model mentioned above, and gets an optimal model for calculating the approximate solution of the combined forecasting method, which is only a combination of two forecasting methods, and obtains the calculating formula of the optimal approximate solution. shen min ( transportation program and management ) directed by song bing liang

    將上述兩種單項預測法進行整合，首先建立了以預測方法有效性指標為目標函數的組合預測優化模型；其次在對組合預測精度序列分析的基礎上，得到了求兩組合預測方法權系數近似解的優化模型及最優近似解的計算公式； 4
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