数值技术

The different methods for establishing the equations of vehicle-bridge system are summarized and assessed. The vehicle-bridge coupling relationship, including the geometrical compatibility condition and the static equilibrium condition at the interface of wheel/rail, is established. The forces on the vehicles, which coming from bridge deflection and track irregularity, and those on the bridge, which coming from vehicle deflection, are given. Then, the governing equations of vehicle-bridge system are setup.

提出了车桥系统运动方程求解的分离迭代技术和相应的数值解法：对建立车桥系统方程的各种不同方法进行归纳与总结；详细建立了车桥耦合关系，即轮轨接触点处的几何相容条件和静力平衡条件；给出了由于桥梁位移和轨道不平顺而引起的作用在车辆上的轮轨力，以及由于车辆位移引起的作用在桥梁上的轮轨力。

In calculation, we use Gray Forecast to predict the constant value, which is used in the diagnosing and reasoning process.

在学习障碍的诊断过程中，我们利用灰色预测的技术来推测诊断过程的变数值，使得计算结果更加精确。

Based on the modal superposition method and the exact solution of beam nature vibration, the motion equations of the simply supported and continuo...

基于模态叠加法和梁固有振动的精确解，建立了移动荷载作用下简支梁和连续梁的运动方程；利用样条最小二乘法逼近桥梁应变响应，由样条数值微分求得响应导数；再通过Tikhonov正则化方法结合奇异值分解技术得到了荷载识别的正则解。

The approximate analytical solution may be expressed in terms of a rapid convergent power series with elegantly computable terms.

近似解结果和数值结果非常符合，证明了所提出的方法的准确性和可靠性，该方法可以用于解决其他科学和工程技术问题。

Using linear matrix inequality technique and convex optimization computing, we can readily implement the synthesis of feedback control law.

反馈控制律的设计利用线性矩阵不等式技术，通过凸优化计算易于实现，最后给出了数值计算示例。

Firstly, we make numerical modeling analysis with finite element method and eliminate the effect of tunnelcavity, translate the apparent resistivity curve of advanced detection in tunnel into the curve in full space.

首先利用有限元数值模拟技术分析并消除坑道空腔对视电阻率的影响，并将坑道超前探测视电阻率曲线转化为全空间视电阻率曲线。

In curvilinear coordinates , a numerical simulation model for wave propagation on non-uniform current in water of slowly varying topography was presented with employing self-adaptive grids method.

利用自适应网格技术，建立了曲线坐标系下缓变水深水域非均匀水流中波浪传播的数值模拟模型。

Based on the characters of positive cyclothem reservoir formation of fluvial facies a conceptive model is founded. Using the technique of reservoir simulation the prediction formulas of bottom-water drive reservoir are obtained.

5以河流相沉积的馆陶组储层底水油藏为原型，建立了地质概念模型，采用数值模拟技术进行计算、统计、分析，建立了水平井产能预测模型以及水平井产能递减预测模型。

Design process modelling is another important area of CAD techniques. In chapter 9, by numeric analysis, composite/decomposite of design objects and metric space, we discuss the quantity feature of design process in detail, which ground the qualitative reasoning in design process.

设计过程建模是CAD技术的又一重要课题，在第九章中，作者运用数值分析的手段，通过设计对象的组合分解，引入距离空间的概念，对设计过程中的定量性作了详细分析，这一分析过程为设计过程建模后续的定性推理提供了坚实的基础。

The research results agree well with the results of field test of weak deep-sea valley.

研究结果表明，考虑流固耦合作用的数值模拟结果与现场监测、观测结果具有良好的一致性，进一步说明围岩、地下水以及相应的施工控制是海底隧道的三大核心技术要素。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。