second-order method 中文意思是什麼

second-order method 解釋
二階法
  • second : adj 1 第二的；第二次的；二等（的）。2 次等的；較差的；劣於…的 （to）。3 〈美國〉較年輕的。4 另一...
  • order : n 1 次序，順序；整齊；（社會）秩序，治安；狀況，常態；健康狀態；條理；會場秩序；議事程序，日程；...
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  1. Presents a new method for fairing of curves which has a small flexibility based on fitting the derivative of second order of curves. we fit the derivative of second order of curves by a polynomial fitting, then find an indefinite integral of this polynomial to get a approach of curves. otherwise, we discuss the analyze of the error and the optimize of fairing to this arithmetic

    提出了一種針對小撓度曲線的逆向曲線光順演算法，該演算法直接擬合曲線型值點列的二階導數曲線，然後通過兩次積分來反求出光順后的曲線，並對該演算法的誤差分析、效果分析、光順優化等問題進行了深入探討。
  2. 1 milner, f. a., and park, e. j., a mixed finite element method for a strongly nonlinear second - order elliptic problem, math. comp., 1995, 64 : 973 988

    2陳煥禎，二階擬線性橢圓問題混合元方法的最大模估計，高等學校計算數學學報，待發表
  3. In this paper, a crank - nicolson mixed element method, a nonlinear galerkin mixed element method for the non stationary conduction - convection problems time second order accuracy fully discrete formats and a two - level mixed element method with backtracing for the stationary conduction - convection problems are presented and analyed, respectively, an error analysis are provided for the crank - nicolson method of time discretization applied to spatially discrete galerkin mixed element approximations of the nonstationary conduction - convection problems

    本文分別給出了非定常的熱傳導-對流問題的crank - nicolson混合元法時間二階精度全離散格式，非線性galerkin混合元法時間二階精度全離散格式以及定常的熱傳導-對流問題回溯二重水平法。討論了時間上的crank - nicolson離散方法應用於非定常的熱傳導-對流問題的空間離散的galerkin混合元近似。
  4. In order to take the influence of the internal force from translation into consideration, the design of in - plane buckling of unbraced frames adopted a new second - order elastic method to calculate the structural internal force, e. g. the imaginary horizontal loads method

    為考慮變形對內力的影響，對無支撐框架的平面內穩定計算提出採用假想水平荷載法進行二階彈性內力分析，以與國際上鋼結構設計相接軌。
  5. Section ii describes the design approach and implementation of speech module on mcf5249 coldfire core. the speech codec optimizes g. 729a codes and added voice activity detection of g. 729b to save bandwidth ; the implementation of acoustic echo cancellation uses nlms algorithm and it can reduce echo though designing adaptive fir filter and speech detector ; the dtmf and cpt generate signal using two second order digital sinusoidal oscillators and detect signal by picking up the frequency information. but only get the frequency information is not enough in cpt detector, this thesis introduces a method

    其中對語音編解碼器的設計採用優化g . 729a代碼達到設計要求，並在此基礎上加入g . 729b的靜音檢測模塊，以進一步降低網路傳輸帶寬;對回聲消除器的設計採用nlms演算法，通過設計自適應fir濾波器和語音檢測器達到回聲消除目的;對雙音多頻設計，信號發生端採用構造靜態參數表並通過二階正弦振蕩器產生信號，信號檢測端提取頻率信息以檢測信號;對呼叫進程音設計，除了類似雙音多頻的信號發生及頻率檢測設計外，還需要檢測信號持續時間，作者設計了一種基於匹配狀態表的方法以檢測信號持續時間。
  6. Numerical simulation of square cavity flow by second - order up - wind finite volume method

    二階迎風有限體積法方腔流數值模擬
  7. This paper introduces three methods to find solutions to second - order constant coefficient inhomogenous linear differential equation, namely multinomial method, ascending order method and integration method

    摘要求二階常系數線性微分方程特解的方法雖然有許多種，但用多項式法、階數上升法、積分法求二階常系數線性微分方程的特解是比較簡便的。
  8. Solving 2 - d inverse heat transfer problems with multi - variables in steady - state via conjugate gradient method based on second - order sensitivity

    基於二階敏度的共軛梯度法求解多宗量穩態傳熱反問題
  9. To explore why the ratio of collectable wort extract is higher than that of non - extruded, the influences of all parameters of rice extrusion system ( barrel temperature, material moisture, screw speed ) on resistant starch content of extuded rice were studied by using second - order quadratic orthogonal rotating combination design method

    摘要為探索擠壓蒸煮大米啤酒輔料麥汁浸出物收得率高於傳統不擠壓蒸煮啤酒輔料收得率的原因，用二次正交旋轉組合試驗法設計安排試驗，研究了大米擠壓蒸煮系統諸參數（套筒溫度、物料含水量、螺桿轉速）對大米抗性澱粉含量的影響規律。
  10. The third part : according to the verified structural damage identification method and supposing the to - be identified parameters to be independent and have normal distribution, the scheme of identifying bridge structure damage is proposed by using the probability damage identification method. assume the zero - order, the first - order and the second - order perturbation statistics of the frequencies and the mode shapes of the bridge structures are known, and substitute them into the statistics property formulas of the frequencies and the mode shapes, as a result an objective function including the mean values and the variance of all the identified parameters is established. set

    對于連續梁橋，當損傷位置位於跨中附近時，大多數無損傷單元的損傷概率均在10 %左右，可作為小概率事件，不發生損傷，但與損傷單元相鄰的無損傷單元，其損傷概率達到20 %以上，很難被排除，只有對這些單元進行二次識別，才能得到比較可靠的計算結果;如果損傷位於支點附近時，則不會出現上述情況，對于無損傷單元，損傷概率都小於10 % ，不發生損傷，損傷識別結果
  11. A multi - block incompressible viscous flow solver has been developed that can be applied to simulation of a variety of ship maneuvering related flows and calculation of hydrodynamic forces. validation and verification of the solution procedure are carried out on several model problems with good agreement to experimental and numerical results. the present block - structured viscous flow solver is based on solving the reynolds - averaged navier - stokes ( rans ) equations with a second - order cell - centered finite volume method ( fvm ) on non - staggered grids

    本文即在這種背景下，瞄準船舶操縱水動力預報方面的國際前沿和熱點課題，通過對現代船舶粘性流計算方法的研究，自主開發了一個船舶操縱粘性流求解器，並將所開發的求解器成功地應用於一系列和船舶操縱問題相關的粘性流動與水動力計算，得到了令人滿意的結果。
  12. A systematic design method of second - order active filter

    關于時點數列序時平均數計算方法的改進
  13. A new computational formula to nonlinear adjustment by parameters, in consideration of the second - order terms, is derived in this paper from the precise orthogonality condition equations to nonlinear least squares by analyzing the direct solving process and iterative computing method of the linearized model

    在分析線性化的非線性參數平差的近似直接解法與迭代解法基礎上，利用非線性最小二乘的精確正交性條件方程，推導出顧及到二次項的非線性參數平差的一種新的計算公式。
  14. Dynamic weighing system is as a second - order system and set it up model, then has its transform function laplace transform and z transform, at last has a formula that m is only relation to the system parameters. this article has system identified with the recursive least square ( rls ) method, and has the system parameters, while the auto - regressive - moving - average ( arma ) model for the second order weighing system is firstly derived. and has a equation which the mass is only correlation to the system parameters

    論文具體分析了定量稱量問題，首先是把稱量系統看作是一個二階系統，建立數學模后，進行拉普拉斯變換和z變換后得出一個質量僅與系統參數有關的關系式，從而把稱量問題轉化為一個系統參數識別問題來解決。通過編寫的程序來採集系統信號並進行處理（運用漸消遞推最小二乘法）對系統參數進行識別，從而得出稱量結果。
  15. In order to overcome problems arisen from the application of x fluorescence analysis into complex spectrum produced by archaeological ceramic fragments with multi - element, low content and thick ground, we have employed the artificial neural network into the research of x fluorescence archaeology and conducted three kinds of research works. as the first one, we have applied the linear olam network ( optimal linear association memory network ) and the non - linear bp network ( back - propagation network ) respectively to analyze the complex x fluorescence spectrum of archaeological samples, and taken both results of spectrum analysis to compare with each other. the second, the method of pattern recognition of bp network was tentatively used to perform intelligent identification of production places of these archaeological samples

    針對科技考古中對大量考古陶片進行產地研究時x熒光分析對多元素、低含量、厚基底考古陶片產生的復雜譜分析的問題，將人工神經網路引入x熒光考古中，進行了三方面的研究工作：一是用線性olam網路（最優線性聯想網路）和非線性bp網路（誤差反傳導網路）分別對考古樣品的x熒光復雜譜進行解譜，並比較二者的解譜效果；二是用bp網路模式識別方法對考古樣品的產地進行智能識別；三是為了提高網路運算的可靠性和減小基體效應及電噪聲的干擾和影響，研究並提出了三種網路學習前的譜數據預處理方法。
  16. But when the imaginary horizontal loads method in the new code was proceeded the second " order elastic analysis, could it achieve the requirement and get the more precise results than the old effective length method

    但新規范中採用假想水平荷載法二階彈性分析是否真的能達到要求?是否就比原來的計算長度法更精確
  17. Iv ) constructing of a kind of approximate integration conservative remapping algorithm. through analyzing a second order sign - preserving conservative remapping method, two conservative remapping algorithms have been constructed by using the reconstruction method to take the place of the positivity - preserving error compensation algorithm

    （ 4 ）近似積分守恆重映方法構造：在分析了二階保號守恆重映方法的基礎上，通過重構的方法代替原演算法中的誤差補償方法，構造了兩個守恆重映方法。
  18. The second order method of fmf is more efficient than the first one, and the advantage will be more obvious with support limit lower. the ooa mining hopes to mine all association rules based on a given objective, support, confidence and utility

    （ 2 ）面向目標的基於效用度的關聯規則挖掘（ ooa挖掘）是在給定目標的情況下，挖掘滿足支持度、置信度和效用度閾值的規則。
  19. The influence on the parameters of the measurement range and stability and its mutual relations are analyzed. it is pointed out that the key parameters are the weight of seismic mass and the critical voltage. dynamic response of closed - loop servo - system of the accelerometer and the method to adjust dynamic parameters are studied by the second - order method

    本文根據已有的加速度計模型，導出了慣性傳感器中敏感質量塊的各個運動方程，通過數學解析的方法，分析了各參數對量程和穩定性的影響以及它們內在的關系，指出關鍵參數是敏感質量和臨界偏壓；根據二階系統分析方法研究加速度計閉環伺服系統的動態響應和調整動態參數的手段，最後利用系統模擬工具matlab給出形象圖解和驗證。
  20. This paper analyzes and modifies all the factors influencing the stability such as elastoplasticity, horizontal loads and asymmetry loads. 6. this paper presents a practical second - order method of the stability of main frame of the steel arch gate by combining the virtues of calculating length method

    本論文的重點為提出框架柱計算長度系數實用計算公式，及考慮剪力影響、不對稱性等因素對影響的研究；提出弧門主框架彈塑性穩定計算方法；提出弧門主框架彈塑性穩定二階分析實用計算方法。
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