计算时间

It has selected for using the total mark method with long step of turning into in emulation , and it is analyzed and starts with mechanism, carried on rational simplifying to the model , reduces the model calculate time , thus it improves the practicability of the model.

仿真中选用了变步长的积分方法，并从机理分析入手，对模型进行了合理的简化，使得模型计算时间大大缩短，从而提高了模型的实用性。

It is superior to the variation method in the time and the sensitivity to the initial values.

该方法在计算时间和对初值的敏感性方面，都要优于变分法。

This includs Chapter Ⅳ-Ⅵ. In Chapter Ⅳ we study the maintenance of ring shapes, and obtain the same conclusions with those by Borderies, Goldreich and Tremaine (1983). But our method is much time-saving in computing.

第四章&自引力模型中的应用&，研究环形状的保持问题，得到与Borderies等(1983)相同的结论，但我们的方法节省计算时间。

The algorithm needn't generate candidate itemsets and scan database, because it employs FP-Tree to store trasanctions in database compressedly and takes full advantage of the characteristic of FP-Tree.Consequently,the complexity of space and time the algorithm used is reduced obviously in the procedure of data mining.In a thorough experimental analysis of our algorithm on real and synthetic data,we isolate the effect of the individual components of the algorithm. Our performance numbers show that MFP-Miner outperforms previous work.

该算法利用频繁模式树来压缩存储数据库中的事务，并充分利用频繁模式树的特点，在挖掘最大频繁项目集的过程中不需要产生候选项目集和扫描数据库，从而减少了算法在挖掘过程中使用的存储空间和计算时间，通过实验结果显示，该算法的性能优于同类算法。

The computation results of the instances that are proposed by Cordeau et al. show that the algorithm can gain acceptable good solutions in the reasonable time.

用Cordeau等人提出的算例实验表明该算法能够在可以接受的计算时间内得到可接受的好解。

Based on the kinematic characteristics analysis of 3 degrees of freedom mobile robot with two drivable and steerable wheels and automatic driving experiences of experts, four sub-fuzzy tracking controllers are designed which realizes independent control of position between orientation of mobile robots to satisfy the desire posture requirements with the simplified fuzzy logic inference and shortened computing time simultaneously.

在平面目标跟踪过程中，将移动机器人跟踪的目标期望位姿分解为4种位置和方位组合，在分析总结了具有2个可操舵驱动轮的3自由度移动机器人运动特性的基础上，根据自动驾驶控制的专家经验知识，针对4种位姿的要求设计了4个子模糊跟踪控制器，这样大大简化了模糊逻辑推理过程，并减少了计算时间，实现了位置和方位的独立跟踪控制，同时满足了跟踪目标的位姿要求。

The continuities of interlaminar stresses are satisfied at the interlaminar surface and the number of degrees of freedom per node is independent from the number of layers.

这样，大大地减少了整个结构的有限元模型中的未知参数，使问题的求解既具有必要的精度，又大大节省了计算机的资源和计算时间。

By numerical modeling of liquefiable slope, it is validated that the coupled method can save computing time than the simple meshless method, and be able to achieve a reasonable accuracy.

通过对可液化边坡模型的数值模拟，验证了该方法比单纯的无网格方法节约计算时间，并能够达到合理的精度。

CPU time used for calculation increases dramatically with respect to the increment of nodal numbers in the object.

对於CPU的计算时间大量的增加是涉及到该目标节点数的增加。

It is shown that using PSE to study nonparallel stability, especially to study nonlinear stability of nonparallel flow is much more effective. The result, which is comparable with Direct Navier-Stokes Simulations , can be obtained, and the time needed is lessened greatly.

采用PSE方法对于研究非平行流稳定性问题，特别是非平行非线性的稳定性问题极为有效，可以获得与直接数值模拟(Direct Numerical Simulations，DNS)精度相当的结果，而所需计算时间则成数量级地减少。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。