查询词典 computation time

By using unstructured dynamic grid based on local remeshing method, the variation of grid caused by projectile movement was analyzed. Numerical computation results of gun muzzle flow field which arranged in time was obtained. The creation process of the complex flow field of gun muzzle was described. The numerical simulation of flow field including moving projectile was achieved.

采用基于局部网格重构法的非结构动网格技术处理弹丸运动造成的网格变化，给出一系列按时间顺序排列的膛口流场数值计算结果，描述了复杂的膛口流场形成发展过程，实现了含运动弹丸的膛口流场的数值模拟。

The mathematical programming formulation and related solution procedure are established by the traditional BEM. Through the discretization of space and time, the elastoplastic stress simulation method and reduce-basis technique are adopted to construct the self-equilibrium stress field. The numbers of variables and constraint equations in the resulting mathematical programming formulation are reduced greatly and then the dimension obstacle of computation in 3-D limit and shakedown analysis is overcome.

采用常规边界元方法建立了三维结构极限与安定分析的数学规划格式，通过对时间和空间的离散化，并采用弹塑性模拟法构造自平衡应力场和引入减缩基技术，大大减少了所形成的数学规划格式中的未知变量和约束方程的数目，有效地克服了三维结构极限与安定分析中的维数障碍问题。

is applied to construct the three-dimension model for finite element analysis. Short circuit and open circuit of the field winding and the teeth and slots structure of the rotor are discussed. An appropriate three-dimensional mesh is made. The corner point problem of conductor is eliminated. Furthermore, a new memory structure for sparse complex matrix and a PCCG method based on it are introduced to save memory and computation time.

在汽轮发电机失磁异步运行转子三维涡流场数值计算模型中，应用了〓法建立了三维有限元计算模型，考虑了转子绕组的开、短路状态及转子齿槽结构，形成了合适的三维剖分网格，解决了三维电磁场有限元计算中角点奇异的问题，创立了一种新的稀疏矩阵的存储格式以及基于该格式的预处理复数共轭梯度法从而减少内存开销和加快了求解速度。

Ethernet connection between target nodes allowing parallel computation of models with low and medium step size, or for free-running,non real-time simulation

各计算节点之间用于进行较短或中等步长的并行计算数据的传输线路，还有进行自由非实时的仿真运算数据的传输线路，也都使用以太网进行连接。

According to theory analysis and example computation, the following conclusions are obtained.1. During the analysis on the cable shape in the suspension bridge"s completion state, the pre-displacement of saddle and the case that the cable and stiff girder commonly bear the second-stage dead load should be considered.2. When supposing the construction ideal initial state in the first time, if the initial state model is established according the cable"s span central sag in the bridge"s completion state, and the reasonable correction formulation is created in the iteration process, the result can converges fast.3. The cable shape in the bridge"s completion state is not parabolic, nor catenary. It is between parabola and catenary. Actually it is funicular polygon closer to the catenary.

通过理论分析和实例的计算表明：1在悬索桥主缆成桥线形分析过程中，须考虑主塔鞍座的偏位以及二期恒载由主缆和加劲梁共同承担的实际情况；2在第一次假设施工理想初态时，以成桥状态已知的主缆跨中垂度建立施工理想初态模型，同时在迭代计算的过程中，建立合理的修正公式，才能使收敛的速度快：3在成桥状态时主缆的线形既不是抛物线，也不是悬链线，而是介于抛物线与悬链线之间，更接近于悬链线的索多边形。

Complication basically is haemorrhage, happen rarely commonly, the occurence rate of serious haemorrhage complication makes an appointment with 5%[2] , plaque reduces the occurence rate of complication to be 4%~5%[2] about, appear afore-mentioned circumstances stop drug in time, the attention monitors cruor function and plaque computation, stability hind is goluptious take China law Lin Kang to coagulate.

并发症主要为出血，一般很少发生，严重出血并发症的发生率约5%[2]，血小板减少并发症的发生率约为4%~5%[2]，出现上述情况及时停药，注重监测凝血功能及血小板计数，稳定后可口服华法林抗凝。1。。。。

Main creative points of the thesis are as following:1. It is the first time to apply 2-D and 3-D turbulent model of the air-water two phases flow to the study on hydraulic properties of groyne. It makes description of the turbulent flow field to be possible precisely. This offers a more accurate method to determine the water surface in channel improvement.2. Based on the results of experiment and simulation for 3-D turbulent model of air-water two phases flow, a new formula to compute the height of damming is built.3. Based on the 2-D mode and the formula to compute the height of damming, the subdivision method of 2-D computation for water surface at upstream and downstream.

本文的创新工作主要是：首次将三维水气两相流紊流数学模型应用于丁坝水动力学特性研究，使丁坝附近流场和紊动场的精细描述成为可能，为航道整治中水面线确定提供了一个更为准确的方法；(2)基于水槽实验和三维水气两相流紊流数学模型数值模拟结果，建立了新的丁坝前奎水高度计算公式；(3)基于上述奎水高度计算公式和本文二维水面计算数学模型，首次提出了丁坝上下游二维水面分段计算方法。

" In other words, what hap pens if the computation doesn"t finish in time?

换句话说，如果计算机没有在指定时间内完成它的工作会发生什么？

And of the problems that can be solved, there are some that require infeasible amount of resources (e.g., millions of years of computation time).

现有对计算的研究已经揭示，存在有无法用算法解决的问题，而有些即便算法可解也不能够在合理的时间内解决。

Furthermore, with the help of the proposed algorithm, the integral frequency offset in time domain can be obtained without FFT transform, that will reduce the computation complexity for the synchronization in MIMO-OFDM systems.

分析表明，新方法具有定时准确检测概率高和小数频偏估计准确的优点，并且利用该算法可以在时域直接估计整数频偏，无需进行FFT运算，从而降低了系统同步的计算量。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。