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approximate相关的网络例句

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与 approximate 相关的网络例句 [注:此内容来源于网络,仅供参考]

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, we use the time-descrete method for constructing an approximate solution, hence, establish a priori estimates of the approximate solution,we prove the existence subsequently by taking the limit of the approximate solution.

首先, 我们用时间离散化的办法构造逼近解,再对逼近解作必要的一致估计,然后通过对逼近解取极限,证明了弱解的存在性。

First of all, Cauchy inequality is used to obtain a basic inequality. Secondly, the functions of basis are made by Galerkin method, and the error estimates of eignevalues are obtained by Cauchy inequality. At last, the computational method of the approximate value of the eigenvalues turns out immediately, and accuracy of the-th approximate value is estimated by the n-tb approximate value.

首先利用Cauchy场不等式证明了一个基本不等式;其次采用Galerkin方法来构造适当的基函数,并利用Cauchy不等式给出了其特征值计算的误差佑计式;最后得到计算梁横向振动问题的特征值的近似值的算法,而且可以用第n次近似值来估计第n-1次的近似值的精确度。

In this paper,the author introduced an approximate augmented Lagrangian function in nonlinear programming,established dual mapping and the related dual problem of this augmented Lagrangian function and obtained the results of approximate strong duality and approximate weak duality of original problems.

介绍了非线性规划中的一种近似增广拉格朗日函数,建立了基于这种增广拉格朗日函数的对偶映射和相应的对偶问题,得到了原问题和对偶问题的强近似对偶和弱近似对偶结果。

First low order approximation of generating function and approximate optimal trajectory were obtained. Then using low order approximation of generating function of Hamilton "relative motion" to the approximate optimal trajectory, improvement of the approximate optimal trajectory was iteratively made. In this way, high order approximation accuracy can be obtained by only using low order approximation, which is much cost effective in computing.

首先以较低的计算代价,获得最优控制Hamilton系统生成函数的低阶近似,得到一条近似的最优轨线,然后将最优控制Hamilton系统相对于近似最优轨线求"相对运动",该"相对运动"仍具有Hamilton性质,利用这一"相对运动"的生成函数低阶近似,可以对近似最优轨线进行迭代修正,从而以计算代价较小的低阶近似逼近计算代价高得多的高阶近似的精度。

In the following part,we define a couple of new approximate operators and a couple of corresponding new approximate measure operators,in this way,inner measure belief function and lower probability all can be considered as the particular cases of this lower approximate measure .

通过定义一对新的逼近算子以及相应的一对逼近测度,使内测度、信任函数、随机集上的下概率均可表示为此下逼近测度结构下的一种特例。

Chapter 3, we study the stability of approximate solutions of nonlinear equation problems(the continuous function is defined in the linear normed space).We prove that most of approximate solutions of nonlinear equation problems are stable; all accurate solutions are the essential points of the set of approximate solution; the connected component which contains the accurate solution is the essential component of the set of approximate solution; especially the number of essential components is finite.

第三章,研究定义在线性赋范空间上的非线性方程问题近似解及其解集的稳定性,得到线性赋范空间上在Baire分类下大多数非线性方程问题的近似解都是稳定的;精确解是近似解集的本质解;包含精确解的近似解集的连通区是本质连通区;包含精确解的近似解集的连通区为有限个。

Then the spatial index is constructed which includes not only the external approximate expression but also interior approximate expression of spatial object and is extended from tranditional index only with external approximate expression. The index structures of MR-tree and MRD-tree based on multi-approximate expression are set up with the prototype index of R-tree, and the relevant algorithms about the index of insertion, deletion and search are provided. Then, the efficiencies of constructing index based on the multi-approximate expression and window range query are analysised and compared. In addition, the several algorithms and efficiency of soving the maximum enclosed circle and maximum enclosed rectangle are discussed and analyzed during constructing index based on multi-approximate expression.

首先,论文讨论了空间数据的特点、空间数据库的关键技术以及空间对象间的拓扑、距离以及方向关系,分析了空间对象的外部和内部近似表达,然后将传统索引中只利用空间对象的外部近似扩展为既有空间对象的外部近似又有空间对象的内部近似,即以空间对象的多重近似来构建索引,并以R-tree为索引原型构建基于多重近似的MR-tree和MRD-tree索引结构,然后给出了相关索引的插入、删除及查找算法,并通过实验比较分析了基于多重近似索引与基于外部近似索引的构建效率及窗口范围查询效率。

In this paper, a region approximation idea that means using a "fat curve" with a width to approximate the offset curve is proposed, and a complete set of algorithms to approximate offset curve using disk Bézier curve are given and implemented. In the algorithms, the optimal and uniform approximate curve of the offset curve as the central curve of the Disk Bézier curve is found by using Remez method, and then the upper optimal and uniform approximation principle is proposed to compute the error radius function of the Disk Bézier curve. Thus, the whole Disk Bézier curve can be obtained. In the end of this paper, the approximate effect of the Disk Bézier curve is not only analyzed and assessed, but also some specific examples are provided.

提出用一条带宽度的"胖曲线"来逼近上述等距曲线的区域逼近思想,并建立与实现了圆域Bézier曲线等距逼近的整套算法,包括应用Remez方法求出等距曲线的最佳一致逼近曲线作为圆域Bézier曲线的中心曲线,提出上控最佳一致逼近的原理求出圆域Bézier曲线的误差半径函数,以及确定整条圆域Bézier曲线,最后还对该圆域Bézier逼近的效果做了分析和考核,并给出了一些具体实例。

And the direction query efficiency based on multi-approximate index is compared with that based on taditional external approximation index. 2 The algorithms of nearest neighbor and reverse nearest neighbor about point, line and ploygen based on multi-approximate index are proposed after the virous methods of distance measure are discussed in detail. And the query efficiency of NN and RNN based on multi-approximate index is compared with that based on taditional external approximation index. 3 The basic concept of semi-join and the strategy of distance-direction semi-join are introduced. And the model of distance relationship, direction relationship and the bounding for spatial object are discussed. Then the method is presented about how to implement the query of distance-direction semi-join, and the efficiency of the algorithm based on multi-approximate index is compared with that based on taditional external approximation index.

即:1在方向关系矩阵模型、开域方向模型基础上,讨论了基于多重近似索引下的定性与定量方向检索方法,并通过实验对基于多重近似索引与外部近似索引下的方向检索效率进行了对比分析;2详细讨论了各种距离度量方法,提出了基于多重近似索引下的点、线、面的最邻近查询和反最邻近查询算法,并通过实验对基于多重近似索引与外部近似索引下的最邻近查询和反最邻近查询效率进行比较分析;3介绍了半连接的基本概念,探讨了距离关系、方向关系以及空间对象数量的约束模型,给出了基于多重近似索引下的距离方向半连接实现方法,并通过实验对基于多重近似索引与外部近似索引下的距离方向半连接的效率进行了比较分析。

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相关中文对照歌词
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推荐网络例句

My boyfriend always takes me to visit the art exhibition in order to try to improve my taste.

我男朋友总是带我去看艺术展览,试图以此来培养我的品味。

In the dark pines the wind disentangles itself.

幽暗的松林里,风儿释放自己。

If you push it,the seat of your chair slides out and back recliners,so you can relax and be comfortable.

您按一下,座位就会往外移,同时座位的靠背向后倾斜,这样您就可以放松而又舒适。