波动方程

The pressure oscillation which can t be tested by continuity equation is prevented by means of a special averaging procedure of contravariant velocity components on control volume faces.

提出了在贴体坐标系中非交错网格的SIMPLE 算法，通过对控制界面上的逆变速度分量作特殊加权平均处理，可避免在非交错网格中产生压力波动而连续性方程又无法检测出来的问题

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

主要针对不同情况分别讨论了价格波动的蛛网模型、微分动力学模型及差分方程模型。

According to longitudinal vibration partial differential equation of rod, the longitudinal vibration displacement response of uniform infinite rods by the harmonic point forces was derived.

longitudinal vibration ； wave approach ；从杆纵向振动的偏微分方程出发，推导了无限长杆在简谐点力作用下的纵向振动位移响应，在此基础上，基于结构线性假设和波的叠加原理，得出了有限长梁纵向振动谐响应的波动表达式，列出了常用的边界条件。

The very important part for wave tomography is to get coefficentmatrix of tomography equations, that is the Jacobin matrix, or deviationderivative matrix of wave field to physical parameters.

波动成像最关键的一步就是求取成像方程的系数矩阵，也就是雅可比系数矩阵，也即波场对物性参数的偏导数矩阵。

Using the powerful calculation capability of MATLAB for matrix,and adopting vector ring and vector chain equation,the paper calculates and imitates the characteristic of kinematics and kinetics about equivalent force model of plane machinery.

利用MATLAB软件对矩阵强大的计算能力，采用矢量环与矢量链方程对平面机构的等效力学模型的运动学特性和动力学特性进行计算仿真，主要针对机构的速度波动特性进行了仿真和分析。

The author originally propsed a discrete dynamic model of pressure fluctuations for the deep slugging fluidized bed.

本文首次提出了深层节涌流化床离散化的压力波动动力学模型，由离散单元的瞬时均匀性条件，使得离散模型方程为一二阶常系数线性微分方程组

Basing on analysis of TCP flow control stochastic differential equation model, this paper presents a new method to analysis queue fluctuation.

本文在分析TCP流量控制微分方程模型的基础上，提出一种新的队列波动分析方法。

To improve the validity of the model, we further make use of SUR approach for systemic estimation.

为提高分析的有效性，我们用SUR方法对模型做了系统估计，并进一步通过方程转化对变量的短期波动和长期均衡关系进行了探讨。

Parabolic equation ; European option ; volatility ; existence ; uniqueness ; necessary condition

抛物型方程；欧式期权；波动率；存在性；唯一性；必要条件

Gymnarchus niloticus ; the long-based flexible dorsal fin ; undulation contour ; polynomial-fitting function ; MPF ; aquatic bio-propulsion

尼罗河魔鬼；柔性长背鳍；波动包络线；多项式拟合方程；奇鳍/对鳍推进；水下仿生推进

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。