查询词典 difference equation

Thus, non-negative property is suggested as the criterion of stability. Further, diffusion coefficient is replaced by an artificial one in the finite difference equation to simulate the entropy generation can improve the accuracy of the numerical analysis.

在尽可能满足对流扩散过程数值格式中的输运性或守恒性及稳定性的同时，以扩散熵产仿真为原则的伪扩散系数可有效地提高数值模拟的仿真性，为数值计算中扩散系数的修正提供了一种有效的手段。

Physical parameter substitutes for phase-changing latent heat, then critical temperature of thermal conductivity welding is determined, so finite difference equation can be solved by MATLAB software.

改变热物性参数替代相变潜热确定了热传导焊接的临界温度值，利用自编的MATLAB程序对有限差分方程进行求解，数值模拟了焊件的温度场。

The finite difference equation was built by using elemental energy balance of reinforced concrete beam with three surfaces exposing to fire based on the thermal properties of concrete. The influence of the physical or chemical reaction of free or combined water in concrete on the temperature field of concrete was considered by magnifying the specific heat of concrete.

根据三面受火钢筋混凝土梁离散体积单元的能量守恒原理，建立了有限差分平衡方程，在合理确定混凝土热工参数基础上，采用增大混凝土质量热容的方法，考虑混凝土中自由水与结合水的物理化学反应对混凝土温度场的影响。

The trajectory theory model of air target was made up according to its basic rule of flight control. A stochastic difference equation to model the air target movement in inertial frame coordinates was introduced.

根据空中目标飞行控制的基本规律，首先建立了空中目标航迹分布的理论模型，并在惯性坐标系中建立了基于随机微分方程的目标运动模型。

The float solution can be solved by the same method of GPS. Due to the influence of the second part, the integer property is damaged, and the two parts are indistinguishable. So the integer part can't be solved directly from the double difference equation.

可以采用与GPS完全相同的方法求得模糊度的浮点解，但受第二项的影响，破坏了其整数特性，并且不能从浮点解中把这两项区分开来，因而不能由双差方程直接求得整周项。

By the theory of difference equation and the construction of proper vector Liapunov function, we for the first time get the sufficient conditions for the permanence, extinction and balancing survival for this ndimensional system, which are all independent on the delays, hence under peroper conditions the time delays of this system are both harmless and profitless.

通过运用差分方程理论以及构造适当向量Liapunov泛函的方法，首次得到了此类系统多维自治的情形下系统持续生存、灭绝和残存的充分条件，这些充分条件均不依赖于时滞，因而在一定条件下，此系统中的滞后因素既是无害时滞也是无益时滞。

The global stability of the positive equilibrium in this system is expounded by using the stability and qualitative theory of the ordinary difference equation,then the existence,the uniqueness and the global stability of the limit circle are proved,thus some former conclusions are extended.

利用微分方程稳定性和定性理论讨论该系统的正平衡点的全局稳定性问题，并得到了极限环的存在唯一性及其全局稳定性，推广了已有的一些结论。

For more and more people buy houses and cars on mortgage loan in modern society,we build the mathematical models of average monthly installment and average degressive corpus installment by using dynamic system model and the first order linear difference equation ,and with the real example to show its usage in our life,meanwhile it giving us the reasons of differences between this two arithmetic.

针对当前社会上流行的按揭贷款买房、购车等现象，利用动力系统模型与一阶线性差分方程，分别建立了月均等额还款与等额本金递减还款法的数学模型，并结合实例说明其在经济生活中的具体运用，同时还给出了两种算法所产生差额的原因所在。

Lde? linear difference equation ?...

线性差分方程

The exponential method, optimal model, two order linear difference equation model were utilized, and the appraisal and forecast to the water quality of Yangtze River were carried out.

江河之中的污染物在水环境中通过物理降解、化学降解、生物降解等方式可使自身浓度降低，这种能力称为自然净化lj，反映这种能力的指标

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。