initial value 中文意思是什麼
initial value
解釋
初始值-
The other type of initial value problem of interest for us is the diffusion equation.
另一類我們感興趣的初值問題是擴散方程。 -
We begin by recapitulating the complete list of equations for a mixed boundary-initial value problem.
開始時，我們重新列出適用於混合邊值問題的那些方程的完備表。 -
In chapter two, we consider full disceret scheme of mixed finite element methods for the following initial - value problems of linear integro - differential equations of parabolic in this chapter, we give the error analysis of this full discrete scheme and get optimal error estimates for the discrete solutions of u and p
第二章討論下述線性拋物型積分微分方程初邊值問題混合有限元方法的后差全離散格式。給出了該全離散格式的誤差分析，得到了離散解逼近未知函數u以及伴隨速度p的關于空間和時間的最優階誤差估計。 -
This paper studied circular queue this basic data structure, discussed the influence of four settings of the front and rear pointer on enqueue and dequeue algorithm pointed out the key problem of writing simple algorithm is the setting of the initial value of the front and rear pointer, summarized the initial value setting and enqueue and dequeue algorithms of four types of front and rear pointer setting
本文研究了一種基本的數據結構? ?循環隊列，討論了循環隊列的四種頭尾指針的設置方法對入隊、出隊演算法實現的影響，說明要寫出簡單出入隊演算法的關鍵在於頭尾指針初值的設置，總結了四種頭尾指針約定下合理的初值設置和出入隊演算法。 -
The method of sobel edge detection is used to get the initial position and orientation value of optimization in order to improve the convergence speed. the iteration numbers and feature abstraction effect are compared with the method in which the initial value is randomly created
演算法使用sobel邊緣檢測方法，給出優化初始位置和方向，以提高優化的收斂速度，針對提取特徵時的優化迭代次數和提取特徵的效果與隨機產生優化初始值的方法進行了比較。 -
In this text, we first do some research on the genetic algorithm about clustering, discuss about the way of coding and the construction of fitness function, analyze the influence that different genetic manipulation do to the effect of cluster algorithm. then analyze and research on the way that select the initial value in the k - means algorithm, we propose a mix clustering algorithm to improve the k - means algorithm by using genetic algorithm. first we use k - learning genetic algorithm to identify the number of the clusters, then use the clustering result of the genetic clustering algorithm as the initial cluster center of k - means clustering. these two steps are finished based on small database which equably sampling from the whole database, now we have known the number of the clusters and initial cluster center, finally we use k - means algorithm to finish the clustering on the whole database. because genetic algorithm search for the best solution by simulating the process of evolution, the most distinct trait of the algorithm is connotative parallelism and the ability to take advantage of the global information, so the algorithm take on strong steadiness, avoid getting into the local
本文首先對聚類分析的遺傳演算法進行了研究，討論了聚類問題的編碼方式和適應度函數的構造方案與計算方法，分析了不同遺傳操作對聚類演算法的性能和聚類效果的影響意義。然後對k - means演算法中初值的選取方法進行了分析和研究，提出了一種基於遺傳演算法的k - means聚類改進（混合聚類演算法） ，在基於均勻采樣的小樣本集上用k值學習遺傳演算法確定聚類數k ，用遺傳聚類演算法的聚類結果作為k - means聚類的初始聚類中心，最後在已知初始聚類數和初始聚類中心的情況下用k - means演算法對完整數據集進行聚類。由於遺傳演算法是一種通過模擬自然進化過程搜索最優解的方法，其顯著特點是隱含并行性和對全局信息的有效利用的能力，所以新的改進演算法具有較強的穩健性，可避免陷入局部最優，大大提高聚類效果。 -
A formula to solve the initial value problem of homogeneous linear differential equations with constant coefficients is given and a formula to solve the homogeneous linear difference equations with constant coefficients under certain conditions is derived
摘要給出了常系數齊次線性微分方程組初值問題的一個求解公式，並由此推出常系數齊次線性差分方程組在給定的初始條件下的一個求解公式。 -
The fourth chapter " reseach on fractai structure of stock price " anaiyzed the fractai structure of stock price, deduced the investment function, caiculated the hurst exponent, 3 correlation dimension, and max lyaponov exponent, analyzed the self - similarity, long range dependence, circulation period of stock price and sensitivity of stock price to the initial value, suggested took the exponent characterize fractal instead of variance as instrument to measure risk
第四章分析並檢驗了股票市場的分形混沌特徵，推導了投資函數，計算了表徵股票市場分形特徵的hurst指數，關聯維和最大lyapunov指數，分析了股票價格的自相似性、長期記憶和循環周期，分析了股票價格的波動對初始條件的敏感性，提出中國股票市場具有混沌分形的特性，用傳統的方差法度量股票風險是無效的，必須使用混沌分析能夠理論來刻畫股票收益的風險，建立收益模型。 -
An iterated algorithm with spline function for initial value problems in nonlinear ode
非線性常微分方程初值問題的樣條函數迭代法 -
Section 6. 13 contains the treatment of an initial-value problem for the axisymmetric motion of infinite elastic medium.
第613節中包含對無窮大彈性媒質的軸對稱運動的初值問題的討論。 -
In section 2. 2, by a priori estimates and fourier spectral method, we prove the existence and uniqueness of the global smooth solution for the periodic initial value problem and obtain the large time error estimate between spectral approximate solution and the exact solution. in sections 2. 3 and 2. 4, by a priori estimates and galerkin method, we prove the existence of the global smooth solution and global attrac - tors for the initial - boundary value problem. chapter 3, consider the initial - boundary value problem of the multidimen - sional non - homogeneous gbbm equations
第二章，考慮一類一維非齊次bbm方程，在第二節中利用fourier譜方法和先驗估計證明了具有周期初值問題的整體光滑解的存在性和唯一性，給出了fourier譜近似解和精確解的長時間誤差估計；在第三、四節中討論了初邊值問題，利用與時間t無關的一致先驗估計，證明了整體光滑解和整體吸引子的存在性。 -
This thesis in combination with the actual engineering demand, analyzes and designs a horizontally polarized triangular - grid planar phased array antenna, which composed of open - ended rectangular waveguide, the main steps of analyzing and designing are as follows : 1. at first, taking no account of mutual coupling among the array elements, classical electromagnetic theory is used to establish analyzing model for finite array, and initial value parameters of the array structure which basic satisfy the design index are got, these parameters provide reference for subsequent analyzing and design
本論文結合實際工程需要，分析和設計了一個採用水平極化方式的三角形柵格矩形波導相控陣天線，其主要步驟如下: 1 .首先，在不考慮陣列單元間互耦影響的情況下，採用經典電磁理論建立有限陣列分析模型，通過分析得到了基本滿足設計指標的陣列結構參數，為后續的分析、設計提供參考。 -
To solve the equation instead of iterative algorithm with an indispensable initial value, the theory of extracting isocurve in two - dimension scalar field is used
利用該演算法可以求出任意浮態下的船體與水線面的交線。 -
Mixed finite element simulation for the initial - value problems of purely longtudinal motion of a humogeneous bar
均勻棒純縱向運動初值問題的混合有限元方法 -
The boundary-initial value problem is reduced to a boundary-value problem only.
邊值-初值問題簡化成僅僅是邊值問題。 -
In order to solve the problems of flux estimation using the voltage model, such as the initial value and the drift of pure integrator, a flux - observer - based method is applied
利用磁通觀測器，可避免用電壓模型推算轉子磁通時遇到的積分運算問題（初始值確定和誤差積累引起的積分漂移） 。 -
By constructing approximate functions and using prior estimate and conversion of variable, it is proved that the inverse problem has weak solution for given initial value, boundary value and the oil output
通過變量和函數變換，作逼近函數和估計等方法，證明了對給定的初邊值和石油產量，此反問題存在弱解。 -
For any c. g. position, an increase in trim speed from any initial value to a larger one requires a downward deflection of the elevator.
對于任意一個重心位置，平衡速度由它的初始值變化到較大的值時要求升降舵向下偏轉。 -
Using the high sensitivity to the initial value of the chaos system, an assistant key is imported based on conventional chaotic encryption algorithm
這種方法基於傳統混沌加密演算法，利用混沌系統對初始條件的敏感依賴性，在圖像加密過程中引入一個輔助密鑰，可有效抵抗已知明文攻擊。 -
The sensitivity to the initial value of chaos system makes it easy to produce a lot of sequences, which can be the source of the digital noise
混沌系統對初始值的極端敏感又使得由它產生的序列量眾多，從而成為數字噪聲取之不竭的源泉。
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