波动方程

Considering a financial market with risky stocks and riskless bond, we describe the stochastic model of stocks prices with stochastic volatility .

在考虑一个带有股票和债券的金融市场后，建立了具随机波动率的股票价格的随机微分方程模型。

The effects of WOB fluctuation of drill string on the wellbore trajectory are analyzed by using stochastic finite element method and perturbation equation.

借助随机有限元方法和摄动方程初步分析了钻压波动对井眼轨迹的影响。

Began by recapping the "recipe" for producing dispersion relations and performing stability analysis (identify equations, linearize, assume a wavy solution, grind through the algebra, analyze results).

概述推导色散关系和进行稳定性分析的方法（鉴别方程，线性化，假设波动解，用代数学方法解析，分析结果

Measurement system for crystal fiber loss has been set up, an idea that single mode quartz fiber acts as the coupler of crystal fiber incident light has been put forward. The propagation loss of the cladded crystal fiber is measured using this measurement system to be 14 times as low as that of the uncladded crystal fiber, and the transmission of low order modes has been realized in the cladded crystal fiber.

利用激光加热基座法生长出了不同直径、不同晶向的LiNbO〓和Nd：MgO：LiNbO〓单晶光纤；根据熔区质量守恒和热量守恒方程解析了生长速度、速度比和激光功率对晶纤内部显微缺陷和直径波动的影响，提出通过控制激光功率和速度比来维持熔区形状的稳定，以实现高品质晶纤的稳定生长。

With degenerate approximations to the oneway LippmannSchwinger integral equation, we study a category of wideangle degenerate migrators that permit the implementation of seismic migration using fast Fourier transforms alone.

通过对LippmannSchwinger单程波动积分方程的退化核逼近，本文研究了一类宽角退化算子的偏移成像。

The mechanism of the energy separation of a vortex tube is caused by the unsteady variation of pressure, viscosity stress and heat transfer through the energy equation.

本文在涡流管机理研究方面，从能量基本方程出发，推导出引起能量分离的因素是压力的不定常波动、粘性应力和热量传递。

The time-domain response model of flaw long screw drill and pour pile was established based on the damped wave equation of pile-soil interaction system.

从桩-土系统共同作用的波动阻尼方程入手，建立了成层土中缺陷长螺旋钻孔灌注桩的时域响应模型。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。