To solve the B-Ss pricing formulas,there are many popular methods now,such as partial differential equation,analytical approximation,binomial tree methods,finite difference method and Monte-Carlo simulation.

對于Black-Scholes期權定價模型精品视频在线影院，如今比較流行的定價方法有偏微分方程、解析近似方法亚洲毛片无码一区二区三区、二叉樹方法Jizz美女18、有限差分方法和Monte-Carlo模擬等。

This section presents two kinds of characteristic schemes, one is the natural use of the usual backward Euler characteristic difference scheme ( [60] ) onto the triangular mesh, the other replaces the backward Euler's method by modified Euler formula to approximate the characteristic differential equation, so that the discretization for characteristic curve can get up to second order accuracy.

本節(jié)給出了兩種三角形網(wǎng)格上的特征差分格式亚洲欧美日韩人人涩涩日日，第一種是通常的向后Euler型特征差分格式（[60]）在三角形網(wǎng)格上的自然運用日韩无码激情免费网站视频，第二種采用§3.3、§3.4的離散思想特级毛片A片全部兔，使用改進的Euler公式代替向后Euler公式來近似特征微分方程韩国美女黄色网站，使其對特征線的離散達到了二階精度。

The thesis is organized as follows:In Chapter 1,a new partial differential equation model for Spontaneous Potential log in heterogeneous formations is introduced.At the same time,the existence and uniqueness of weak solution to the problem are proved,and the problem of resistance identification in SP log is studied.Furthermore,a jump condition capturing finite difference scheme is proposed and applied to solve such elliptic interface problems.The effects of various factors on SP response,which include objective layers resistivity,bed thickness,bore-hole diameter,invasion and water-flooded zones and so on,are investigated quantitatively by the proposed method, and satisfactory results are obtained.

具體安排如下：第一章首先建立復雜地層中自然電位測井的偏微分方程數(shù)學模型国产白领诱惑在线观看电影视频网站，證明了該邊值問題弱解的存在唯一性国产一区在线视频免费观看，在此基礎上研究了自然電位測井電阻率識別問題：然后發(fā)展了用于求解橢圓交界面問題的間斷捕捉有限差分方法，利用該方法定量分析了目的層電阻率亚洲无码一级片黄片、地層厚度WWW……com黄色视频、井徑、侵入帶和水淹層等因素對自然電位測井響應的影響免费A级毛片无卡免费视频，取得了滿意的結(jié)果国产高潮白浆调教福利在线视频。

The Fourier method and heuristic stability theory for the analysis of the computational stability criterion of the difference scheme of linear partial differential equation are also briefly introduced.

對分析線性偏微分方程差分格式計算穩(wěn)定性判據(jù)的Fourier方法、啟發(fā)性穩(wěn)定性分析方法国产www性性，也做了簡要的介紹永久无毒在线观看你懂的。

Differential coefficient and difference simulation equation of gray model GM (1, 2), representing the relationship between 28d compressive strength and 4-32μ m particle content respectively is

顆粒粒級范圍對強度的灰色系統(tǒng)關聯(lián)度分析結(jié)果表明：對于普通硅酸鹽水泥，4-8μm顆粒含量對水泥3d抗壓強度的影響最大欧美一级男女插穴视频，8-16μm顆粒含量對水泥28d抗壓強度的影響最大能看的黄色网站福利，對水泥90d抗壓強度，則16-24μm顆粒的影響最大天天操天天操三级。28d抗壓強度與4-32μm顆粒含量灰色模型GM（1欧美体内she精高潮，2）的微分方程和差分模擬式分別為

By applying the explicit and implicit Euler methods to the neutral delay differential equation, two difference equations of the numerical solution are obtained.

把顯式Euler方法和隱式Euler方法分別應用到這個中立型微分方程，得到了兩個關于數(shù)值解的差分方程网黄网址免费。

The cobweb model that basically debated price wave motion respectively in the light of different situation, differential kinetic model and difference distribute equation model.

主要針對不同情況分別討論了價格波動的蛛網(wǎng)模型www.madouav、微分動力學模型及差分方程模型。

Among used machine learning methods, the gradient descent method is widely used to train various classifiers, such as Back-propagation neural network and linear text classifier. However, the gradient descent method is easily trapped into a local minimum and slowly converges. Thus, this study presents a gradient forecasting search method based on prediction methods to enhance the performance of the gradient descent method in order to develop a more efficient and precise machine learning method for Web mining.However, a prediction method with few sample data items and precise forecasting ability is a key issue to the gradient forecasting search method. Applying statistic-based prediction methods to implement GFSM is unsuitable because they require a large number of data items to model a prediction model. In the contrast with statistic-based prediction methods, GM(1,1) grey prediction model does not need a large number of data items to build a prediction model, and it has low computational load. However, the original GM(1,1) grey prediction model uses a mathematical hypothesis and approximation to transform a continuous differential equation into a discrete difference equation in order to model a forecasting model.

其中梯度法是一個最常被使用來實現(xiàn)機器學習的方法之一国产精品一区二区视色，然而梯度法具有學習速度慢以及容易陷入局部最佳解的缺點劲爆欧美中文字幕精品视频，因此国产免费吃奶摸下视频在线观看，本研究提出一個梯度預測搜尋法則(gradient forecasting search method， GFSM)來改善傳統(tǒng)梯度法的缺點欧美性生活视屏另类，用來提升一些以梯度學習法則為基礎的分類器在資訊探勘上的效率與正確性欧美精品性欧美；而一個所需資料量少、計算復雜度低且精確的預測模型是梯度預測搜尋法能否有效進行最佳解搜尋之關鍵因素日韩欧美一级视屏，傳統(tǒng)統(tǒng)計為基礎之預測方法的缺點是需要較大量的數(shù)據(jù)進行預測国产黄一级视频网站，因此計算復雜度高，灰色預測模型具有建模資料少且計算復雜度低等優(yōu)點三级片a网站，然而灰色預測理論以連續(xù)之微分方程式為基礎国产丰满的富婆aa毛片，并且透過一些數(shù)學上的假設與近似，將連續(xù)之微分方程式轉(zhuǎn)換成離散之差分方程式來對離散型資料進行建模及預測日韩中文字幕在线另类在线，這樣的作法不盡合理美女不带套日出白浆免费视频，且缺乏數(shù)學理論上的完備性，因為在轉(zhuǎn)換過程中已經(jīng)造成建模上的誤差精品国语91，且建模過程僅考慮相鄰的兩個資料點關系美国淫色网，無法正確反應數(shù)列未來的變化趨勢。

To price the continuously sampled arithmetic average Asian option, an implicit upwind difference scheme is constructed based on the final boundary value problem of partial differential equation, which is satifiable to the option pricing problem. Then the unique existence and unconditional stability of the difference solution are demonstrated and the error estimate is given under the discrete L2 norm.

研究連續(xù)取樣的算術平均亞式期權定價問題的差分方法欧美老女人性爱网站，根據(jù)問題所滿足的偏微分方程終邊值問題亚洲中文字幕一区二区在线观看，構造出一種隱式的迎風差分格式，論證了差分解的惟一存在性和絕對穩(wěn)定性啪在线看，并給出差分解在離散L2范數(shù)下的誤差估計亚洲国产精品一区二区久久久。

Filter factor with high computation efficiency can be obtained through resolving the difference equation without reducing the number of dimension in solving the 3D partial differential equation.

在求解三維濾波方程時不對三維微分方程進行降維處理，僅對差分方程進行分解亚洲精品国精品久久99热一，從而獲得計算效率很高的濾波因子男人的视屏超碰女人帮。