查询词典 exponential decay

Not only the shortcoming that the smoothing constant and order of the model are not changed for the exponential smoothing model during the process of prediction has been overcome, but also the theory of threshold model has been further developed.

这不但克服了指数修匀模式在预报过程中修匀常数和模式形式一直不变的缺陷，也进一步发展了门限模式的理论。

This paper deals with pricing theory and empirical study about European option pricing when stock prices obey exponential Generalized hyperbolic levy process.

本文研究股价服从指数广义双曲levy过程下的欧式期权定价理论，并以宝钢欧式看涨期权为例，通过技术方法实现定价。

The second, the third and the fourth degree of fallen tree snag, and CWD account for 86 12%, 78 40% and 79 65% wlume of the total volumes of fallen tree, snag and CWD respectively. The water-absorption and water-losing process is the exponential function of the time.

CWD的腐朽级以处于第Ⅱ、Ⅲ和Ⅳ级为主，Ⅱ、Ⅲ、Ⅳ级的倒木、站杆和总的CWD蓄积量分别占倒木、站杆和粗木质残体总蓄积量的 86 12 %，78 4 0 %和 79 6 5 %，CWD的吸湿和脱湿过程是时间的指数函数。

Under the hypothesis of stock price submitting to exponential Ornstein-Uhlenbeck process ,we solve the formula of pricing of stock and analyse the kind of the option formula, and then aiming at the blemish to suppose to interest rate before and considering the relation of the fluctuation of interest rate and the fluctuation of stock price , we bring up the model of the market interest rate and focus on analyzing the effect of the fluctuation of market interest rate on the option price based on the model.

本文首先在股票价格服从指数Ornstein-Uhlenbeck过程模型假设下，求解了股票的定价公式，分析了期权公式的性质，然后针对以往对利率假定的缺陷，考虑到市场利率波动与股价波动的相关性，提出了市场利率模型，并在此基础上，着重分析了市场利率的波动对期权价值的影响，求得了适合于期权有效期较长情形下的期权定价公式，并将该公式通过实例与著名的Black-Scholes期权定价公式进行了深入比较。

The method develops a reliability growth model to describe the development process of exponential life system for the failure censored testing case, and presents a Bayesian sequential testing procedure to decide whether testing should continue or be terminated during the development.

该方法建立了描述指数寿命系统失效截尾试验的可靠性增长模型，并依据产品研制过程中产生的多阶段试验数据，给出了系统失效率验前分布的确定方法，进而构建了系统失效率统计检验的Bayes序贯模型，实现了对具有可靠性增长的系统可靠性指标的假设检验。

The Establishment and Application of Evaluation Criteria System for Search Engines Zhu Qinghua and Du Jia ( Department of Information Management, Nanjing University, Nanjing 210093)According to the features of search engines, this paper establishes a set of evaluation criteria system for search engines by using Delphi Method online, and calculates the weight of these evaluation criteria by Analytic Hierarchy Process based on exponential scale.

本文结合搜索引擎的特点，采用网上特尔菲法进行专家调查以确定搜索引擎评价的各项指标，并利用基于指数标度的层次分析法确定各项指标的权重，从而构建搜索引擎评价指标体系。

The Logarithm Process model adapts to describe early failure phase and random failure phase, the Exponential Process model fits for different phase.

其中对数过程模型可用于可修系统使用早中期的情形；指数过程模型可用于描述可修系统各个不同使用阶段的故障统计规律。

The formulas of the pricing European option are obtained for the stock whose price process is driven by exponential O_U process by the above tw...

证明了在指数O U过程模型下保险精算定价是一有套利定价。

A new discrete reaching law is presented to improve the reaching process of discrete exponential reaching law.The discrete-time variable structure control system designed by this reaching law can not only weaken the chattering and control the system state approach to zero diminishingly,but also keep the basic property of quasi-sliding mode which can cross the switching surface step by step.This method improves the reaching process and enhances the control quality of the control system.

为了改善离散指数趋近律的趋近过程，提出了一种新的趋近律，利用该趋近律设计的变结构控制器，不仅能够大幅度削弱抖振，使系统运动最终趋于原点不存在稳态振荡，而且能使系统的准滑动模态保持步步穿越切换面的基本属性，有效地改善了趋近过程，提高了控制品质。

The stochastic exponential growth model and birth-death process model were established to analyze the extinction risk and population viability with detected data of wild Pere David's deer populations.

利用野放麋鹿Elaphurus davidianus种群检测数据建立了随机指数增长模型与生死过程模型，并对种群的未来状态、灭绝风险及种群生存力进行了分析。

Eight cases of simple chordee of penis were adopted urethral extending.9 cases of severe simple chordee of penis were adopted primary urethroplasty.

8例单纯性阴茎下弯患者采取尿道延伸术，9例重度阴茎下弯患者采取切断尿道矫直阴茎一期尿道成形术。

She is a daintily dressed young lady.

她是个装饰娇艳的少女。