离散化

A fourth-order compact finite difference alternating-direction-implicit algorithm is proposed for solving the unsteady-state Navier-Stokes equations of fluid flow and heat transfer using the streamfunction-vorticity formulation. Point-successive overtaxation iteration is used to achieve the steady solutions.

本文构造了求解二维非定常涡量流函数形式Navier-Stokes方程组的一种四阶紧致交错方向隐式差分算法，对包括能量方程在内的离散化方程组采用逐次超松驰迭代法求得稳定解，求解了二维非定常粘性不可压缩流体的流动与传热问题。

Combined the NI PXI-5124 digitizer with the principle of digital quartered demodulation,the software demodulates the dispersed signal efficiently while showing the results perspicuously.

结合NIPXI-5124数据采集卡及数字正交解调的基本原理，该软件可实现对离散化的数字调制信号进行解调分析，同时直观地显示处理结果。

To obtain quadratical convergence, however, strict complementarity condition at the Danskin point was used. The condition is too strict to be satisfied in many practical problems such as discrete semi-infinite minimax problem. Another kind of Newton method for finite minimax problems was presented by E. Polak and, without strict complementarity at the Danskin point, superlinear convergence (of order 3/2) was proven.

Polak等人提出了一种直接求解极大极小问题的二阶收敛的牛顿法，但是为获得二阶收敛速度要求在Danskin点处满足严格互补条件，这个条件太强，很多实际问题尤其是半无限极大极小问题的离散化不满足该条件；他们又给出另外一种牛顿法，在不假设严格互补条件成立的情况下，证明了它的超线性（3/2阶）收敛性。

Through the discussion on the calculating methods for failure probability of element section with the influence of one or more human errors ,a mathematic analytical formula under ideal known conditions is deduced.

通过对单个或任意多个人因差错影响下构件截面失效概率计算方法的分析讨论，推导出在理想已知条件下的数学解析求解公式；在考虑人因差错对结构参数影响程度的空间离散化后，得出了相应的简化计算方法；并以一个单筋梁的正截面为例进行了失效概率计算和人因差错影响程度分析。

On the basis of the profound research on the theory of random process remote simulative control, an RPC model is established.

在对随机过程远程模拟控制理论进行研究的基础上，建立了一个严谨离散化的，便于工程应用的RPC模型。

The novel video data packeting algorithm based on scattered macroblocks and spirally scan order avoids limitations of traditional raster scan order.

同时，本文针对传统光栅扫描方式的局限性，融合离散化宏块和螺旋扫描算法，提出了一种新的视频数据打包算法。

Secondly, the theory for multi-flexible dynamical systems is introduced and applied, and the simplified system obtained is cubic nonlinear, with 1:3 internal resonance for certain parameter condition.

其次，简要介绍了柔性多体动力学理论，将柔性多体动力学理论应用于一类刚柔耦合系统的建模。该多柔体系统离散化后的简化模型为一个含有1：3内共振关系的立方非线性系统。

This method can be applied to many sea surface models because it uses discrete analysis on the two-dimensional model, which is important for the retrievement of sea polarimetric information.

由于该方法是对二维海面模型进行离散化分析，因此适用于多种海面模型。

Then, the detail progress of 2D FEM is presented, such as the discrete method of 2~ order isoparametric element and the disperse program using scalar quantity.

然后对二维有限元的处理方法展开说明，给出了二阶等参元剖分算法和标量离散化处理方法。

It is shown that some problems of this new class, together with a suitable time discretization ,represent the schematization of the original problem corresponding to well known numerical integration schemes.

它被显示这个新的班级一些问题，连同一个适当的时间离散化一起，表现对广为人知数字的整合方案符合的最初问题的 schematization 。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。