查询词典 continuous approximation

The basic idea is to set a continuous solution of the region with a finite number of discrete points instead of a grid consisting of, these discrete points called grid nodes the solution of a continuous area on a given function of continuous variables used in the definition of discrete grid variable function approximation the original equation and boundary conditions in the micro-business operators to approximate differential, integral with the points and to approximate, so the original differential equations and boundary conditions are replaced by algebraic equations near Side, that is, finite difference equations , solve this equation group can get the original problem in discrete points on the approximate solution.

基本思想是把连续的定解区域用有限个离散点构成的网格来代替，这些离散点称作网格的节点；把连续定解区域上的连续变量的函数用在网格上定义的离散变量函数来近似；把原方程和定解条件中的微商用差商来近似，积分用积分和来近似，于是原微分方程和定解条件就近似地代之以代数方程组，即有限差分方程组，解此方程组就可以得到原问题在离散点上的近似解。

First, an overview of discrete and continuous approximation models of the distribution network designing is present, as well as the models' strong points, shortcomings and their complement relationships.

对分销网络设计的离散模型和连续近似模型进行比较，指出两者的优缺点及它们之间的互补关系。

This is a unique and interesting way of looking at the planning of logistics systems using Logistics Cost Functions and continuous approximation methods.

这本书使用运筹成本函数与连续近似方法来规划运筹系统的方式，可谓独特且有趣。

Through the novel continuous approximation model, we can get the solutions of distribution network, distribution centers' inventory strategy and distribution policy of 'power of two' at the same time.

该模型在确定分销网络结构的同时，也确定了分销中心的库存策略和对其客户的配送策略。

The strategies of vendor managed inventory and 'power of two' policy are introduced in the continuous approximation model of distribution network designing.

从供应商管理库存角度出发，引入了Power of Two周期配送策略，构建了VMI环境下两级分销网络设计的连续近似模型。

A decision model of distribution network's echelons is present, which integrates approximating method of total distance in continuous approximation model and quantifying method of 'bullwhip effect' in supply chain.

权衡此多项费用，结合客户需求方差在供应链上的传播方式和连续近似模型中关于总路程的近似算法，建立了分销网络结构层次的决策模型。

The redesigning frame makes up of two models: one is redesigning time decision model, which is based on continuous approximation model; the other is specific redesigning model, which comes from the model of location-routing problem.

文中用树编码遗传算法来求解该设计框架中的离散模型，并对遗传算法中的编码、解码、交叉、变异、免疫等各种算子做了详细的介绍。

In the case study of one unit in Nanjing,with the aid of traffic turnover and the continuous approximation,the evaluation model was applied to calculate the carbon emission of the circulation between areas in the urban micro subject.

以南京市某单位为例，采用交通周转量与连续逼近法，对研究单位园区间流通带来的碳排放进行了评测。

Applying the Euler method to the equation and particularly using the interpolation technique on variable delay, the Euler approximation is obtained. The discrete Euler approximation is extended to the continuous Euler approximation. It is proved that the Euler numerical solutions will converge strongly to the true solution under the local Lipschitz condition.

对方程应用欧拉方法，特别地对变延迟部分运用插值技巧进行数值离散后，将离散的欧拉格式延拓为连续的欧拉格式，从而得到欧拉格式在局部Lipschitz条件下强收敛到解析解。

Firstly, this paper investigated roundly the basic theory of the ambient vibration method, analyzed systematically the main methods of ambient vibration identification, and discussed their advantages and disadvantages. Then we established the finite element model of structural dynamics and test model and analyzed their mutual relation, improved MUSIC method and correlation function method in the harmonic identification, and gave the subspace method and correlation function method based on continuous model, which is multi-harmonic retrieve technique. And then, this paper also puts forward least-squares method to estimate directly structural physical and modal parameters; this approach replaced the derivative operator in the continuous time model with an equivalent approximation, and estimated the physical parameters of structures by the least-squares method. And then, we discussed the approximation methods of derivative and their convergence. Finally, this paper researched the modal parameters of a frame structure by the simulation and test. The results demonstrated that subspace method, correlation function method and the least-squares method are effective and stable respectively.

全面地研究环境振动识别方法的基本理论，系统地分析环境振动识别方法的主要方法，讨论它们的优点和不足；建立结(来源：6666AB44C论文网www.abclunwen.com)构动力学的有限元模型和试验模型，分析有限元模型与试验模型之间的相互关系；改进谐波识别中的MUSIC识别方法和相关函数识别方法，给出大型结构模态识别的连续型的子空间分解识别方法和相关函数识别方法，这个方法是多元谐波识别方法；提出直接识别结构的物理参数和模态参数的最小二乘方法，这个方法利用导数的近似值代替导数值，并运用最小二乘方法识别结构的物理参数，讨论导数近似值的选择方法，分析算法的收敛性；通过仿真计算和模型实验，研究高层框架结构的模态参数识别，验证子空间分解识别方法、相关函数识别方法和最小二乘识别方法的有效性，算法的稳定性；从理论和试验两个方面分析和研究噪声对识别精度的影响，影响识别精度的因素，以及部分模态成分的模态参数不能够被识别的原因。

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。