查询词典 iterative computation

For the LS problem, the method of normal equations needs less computation but its computed solution has poor accuracy. If QR factorization is used, more accurate solution can be got. However, its computation is nearly as twice as the method of normal equations.

对于线性最小二乘问题，混合方法的提出是企图在法方程法与QR分解方法之间取得某种平衡，希望能够节省计算量又同时保持计算解达到较高精度，但后者在理论上并未得到证明。

The research area involves computation of many optimization problems as well as many classical problems in numerical computation.

这方面研究不仅包括各种最优化问题的求解，也包括数值计算经典问题的求解。

Paraxial approximation absorption boundary condition based on acoustic wave equation can obtain better absorption results by increasing paraxial approximation order of Taylor series. However, this kind of operation will increase the complexity of difference computation, and result in instability of computation process.

基于声波波动方程的旁轴近似吸收边界条件可以通过提高泰勒级数展开的旁轴近似阶数获得更好的吸收效果，但这样不仅增加了差分计算的复杂性，同时还导致计算过程不稳定。

Century interconnection vise general manager makes An Bin express when accepting a special report, this company devotes oneself to to popularize cloud computation, stationmaster uses 300 yuan to be able to use cloud computation product.

世纪互联副总经理许广彬在接受专访时表示，该公司致力于推广云计算，站长用300元就能用上云计算产品。

So it can be avoided that the computation accuracy is lowered and the calculation result is hard to be convergent for the odd state of transformation matrix.The computation accuracy of wavelet Ritz method and wavelet Galerkin method has been improved so the special'microscopic'property could be fully expressed. An effective method is offered also to solve the problem of high stress gradient and some other odd state problems in engineering.

从而避免了由于转换矩阵奇异而造成精度下降且计算结果不易收敛的问题，提升了小波Ritz法和小波Galerkin法的求解精度，使小波分析的"显微"特性得以充分发挥，并为应力大梯度问题和工程奇异问题的有效求解提供了强有力的计算手段。

Here, using the mathematica software and the outcome of the computation , we can see which interval is better easily. In chapter 2, the author firstly studies three two-stage simultaneous confidence intervals for the pairwise treatments with the same precision and reliability in a balance one-way classification model ,then work out the optimal sample size of the first stage by numerial computation.

第2章作者讨论了平衡单向分类模型中，成对效应对照的三种两步同时置信区间，接着在保证三种区间可靠度和精度相同的情况下，利用数值计算的方法对最优第一步抽样量及平均抽样次数进行比较。

A motion compensated temporal filtering step between a previous reference frame A and a current frame B comprises in a first time a computation sub-step of the high frequency subband, followed by a computation sub-step of the low frequency subband.

在先前参考帧A和当前帧B之间的运动补偿时间滤波步骤包括首先计算高频子带的分步骤，之后为计算低频子带的分步骤。

Due to the efforts of McCarthy(1962),Landin(1964),Strachey(1966),Wegner (1968),and others who provided insight into operational models of computation , we can now evaluate programming languages in terms of an unifying view of computation structures .

然而，Babel空想得以避免的第二个原因是计算机科学家已开始应用科学的方法来组织各种程序设计语言的分类、比较和鉴别。

Due to the efforts of McCarthy(1962), Landin(1964), Strachey(1996), Wegner(1968), and others who provided insight into operational models of computation. We can now evaluate programming languages in terms of an unifying view of computation structures. Semantics and the expressive power resulting from modularity can now be studied in terms of the data structures and the accessing paths to them established during the execution of the control statements of the language.

通过 McCarthy(1962)、 Landin(1964)、 Strachey(1996)、 Wegner(1968)和其他对计算的操作模型深入考查的人们的努力，现在我们正以统一的计算结构观点来评价程序设计语言，可以通过数据结构以及在执行语言语句时建立的访问路径，来研究语言和模块化导出的表达能力。

In the computer simulation of FEM software ANSYS, contact surface element is used. Its computation results are compared and analyzed with the results used theoretical computation method of this thesis.

运用大型有限元软件ANSYS进行了数值模拟，桩与土之间使用了接触面单元，并与本文的理论计算方法得出的结果进行了对比分析。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。