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提高数值
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  improve numerical
     This method can improve numerical solution precision.
     该方法的网格剖分为粗网格和细网格,能够大大提高数值解的精确度.
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     For the coupling between IPO with FDTD fields, the "background noise" is picked up to improve numerical precision.
     在IPO和FDTD之间场耦合中,通过提取“本底噪声”来提高数值精度。
短句来源
     Coupling IPO with FDTD, we pick up "background noise" to improve numerical value precision.
     在IPO和FDTD之间场耦合中,通过提取“本低噪声”方法提高数值精度。
短句来源
     Along with the improvement of numerical models and the enhancement of observation technology,data assimilation has become an efficient method that can further improve numerical prediction level.
     随着数值模式的不断完善和观测技术的不断提高,资料同化逐渐成为能够进一步提高数值预报水平的一种有效方法。
短句来源
     Jamesoncentral difference scheme, LU-SGS implicit iterative method and round-off control were usedto accelerate convergence rates and improve numerical precision.
     在计算中,采用Jameson中心格式,有限差分方法,并运用截断误差控制、LU-SGS隐式迭代等技术,加快收敛,提高数值精度。
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  “提高数值”译为未确定词的双语例句
     The results show that the method of "breeding of the growing mode" is the best among them, and ensembling forecast can truly improve the effect of numerical forecast.
     结果表明 :初始扰动的好坏对集合预报效果有至关重要的影响 ,总体而言 ,增长模繁殖法优于控制预报、蒙特卡洛法和时间滞后法 ,且集合预报的确能起到提高数值预报效果的作用。
短句来源
     Based on the one-order velocity-stress elastic wave equation,this paper emphasizes on improving the computation precision and the efficiency from to compartmentalize the discrete grid,solve the spacial derivative and add the boundary condition.
     这里从一阶速度—应力弹性波动方程出发,着重介绍如何构造离散化模型的网格,如何求解空间导数,如何选取边界条件等内容,从而更有效地提高数值计算的精度与计算效率。
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     A method with adding virtual zero load measurement to enhance the observability for state estimation is also proposed.
     文中还提出一种通过添加零虚拟负荷量测提高数值可观性的方法 ,使原本不可估计的网络能够进行状态估计。
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     QR decomposition can improve the condition number of a matrix and then improve the numerical stability.
     QR分解可以改善矩阵条件数,从而提高数值稳定性。
短句来源
     Consequently, this scheme is feasible and valid. The research enriches the contents of variational assimilation and makes it more extensive application, which increases the quality of initial fields in NWP.
     因此,将遗传算法应用于四维变分资料同化是切实可行而且有效的,这一工作丰富了变分同化的内容,使变分同化技术作为提高数值预报初始场的质量这一有效技术得到了进一步的应用。
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  相似匹配句对
     INCREASE PRECISION OF NUMERICAL OPERATION MAKE USE OF ARRAY
     利用数组提高数值运算的精度
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     Numerical Imitation Improving Accuracy of the Magnetoelectric Ammeter
     数值拟合提高磁电系电表精度
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     improve the staff's qualities;
     提高人员素质;
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     Increase cure rate.
     提高治愈率。
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     The computational result is compared with G.
     数值结果和G.
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  improve numerical
For instance, we can use them to check the accuracy, convergence and effectiveness of various numerical computational methods and to improve numerical calculation skills such as differential schemes and grid generation ways.
      
In order to effectively improve numerical prediction level by using current models and data, the strategy and methodology of dynamical analogue prediction (DAP) is deeply studied in the present paper.
      
A polar coordinate integration scheme with a hierachical correction procedure to improve numerical accuracy on the boundary elem
      
COST 715 reached a consensus proposing representatively sited measurements of meteorological parameters and turbulent fluxes above roof-tops, and recognised that such data are needed to improve numerical models of the urban surface processes.
      
Using Accurate Arithmetics to Improve Numerical Reproducibility and Stability in Parallel Applications
      
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Low-inertia dc servomotors are widely used in modern digital computer periphe-rals,A typical application for such a motor is to drive the capstan of a digital tapedrive,In this paper,we have centered attention on the comparison between the twobasic magnetic structures with tangentially and radially magnetized magnets used inlow-inertia de servomotors with rare earth magnets.The computer-aided design ap-proach based on the field model and using the finite element methed has been usedat the design stage of the...

Low-inertia dc servomotors are widely used in modern digital computer periphe-rals,A typical application for such a motor is to drive the capstan of a digital tapedrive,In this paper,we have centered attention on the comparison between the twobasic magnetic structures with tangentially and radially magnetized magnets used inlow-inertia de servomotors with rare earth magnets.The computer-aided design ap-proach based on the field model and using the finite element methed has been usedat the design stage of the motor.A medified 2-dimensional field model taking theend leakage flux into account for the open magnetic structure is presented to improvethe accuracy of the numerical solution,Prototype test and computation results indi-cate that the numerical approach presented is very convenient and efficient,and ahigh-performance low-inertia dc servomotor with greatly reduced size and improvedperformance can be obtained by the use of the magnetic structure with tangentiallymagnetized rare earth magnets and the computer-aided design method presented.

在近代数字计算机外围设备中,广泛使用低惯量直流伺服电动机。这类电动机的典型用途是驱动数字磁带机的主动轮。本文集中地对稀土永磁低惯量直流伺服电动机中的两种基本磁结构、即切向和径向磁化磁铁的磁结构进行了比较。在电动机的设计阶段,采用了基于场模型和使用有限元法的计算机辅助设计方法。为了提高数值解的精度,提出了一种用于开放型磁结构并计及端部漏磁通的、改进的二维场模型。样机试验和计算结果表明提出的数值方法十分方便和有效,并表明采用本文所述方法后,能够得到尺寸大为缩小和性能显著提高的低惯量直流伺服电动机。

Equations of the boundary conditions at the end of the exhaust pipe have been rewritten after introducing new variables. It avoids singularities of previous methods.The pressure at a branch point is considered continuous, but entropy is discontinuous.The location of characteristic curve is continuously modified in the solution of the gas dynamical equations. The rate of convergence is much improved. Numerical results for a medium speed diesel engine are also given.

本文是引用新的物理量后,建立了柴油发动机排气压力波气缸端新的边界方程式。它不但克服了[2,3]提出的边界方程式中带有奇性的弊病,而且在一定区域内唯一可解,从而大大改善了数值解的收敛速率,对于分枝交叉中心处,提出了压力相等而熵值可忍受跳跃的模型,建立了相应的边界方程式,并应用网格特征线方法求解(1.7)。特征线位置通过迭代不断得到修正,提高了数值解的精度。运用所述边界方程式及方法,对一台中速柴油机排气压力波进行数值计算,得到了良好的结果,与实测相当吻合。

Abstract

本文综述大庆油田小井距试验区进行的数值模拟研究工作,其中包括试验区动态的历史拟合、中心井控制储量计算和对采收率的校正。文中涉及到数值模型;等级三角形网格、地层参数插值法、拟相对渗透率曲线、流线图的计算和绘制、控制储量的确定等具体模拟方法;以及模拟结果的买际应用等方面内容。本文对总结交流数值模拟经验和进一步提高数值模拟工作水平是有益的。

 
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