渐近分析是一种描述函数在极限附近的行为的方法。渐近分析方法在多个科学领域得到应用。在统计,渐近理论提供限制的近似概率分布的样本统计,如似然比统计量和所述期望值中的偏差。渐近分析也是探索现实世界现象的数学建模中出现的常微分方程和偏微分方程的关键工具。
Mathematical modes of fluid transient flows are presented and solved by integraltransformation in the three-dimensional reservoir with bottom water and/or gas gap. Bottom-hole pressure formulae are obtained by the asymptotic analysis in the late period.
建立了底水或气顶地层、三维底水和气顶地层的水平井三维不稳定渗流数学模型并进行了求解,通过渐近分析得到了晚期稳态流动压力公式。
参考来源 - 水平井产能分析理论与方法研究·2,447,543篇论文数据,部分数据来源于NoteExpress
采用弹粘塑性力学模型,对扩展裂纹尖端的应力和应变场进行了渐近分析。
An elastic_viscoplastic model is adopted to investigate asymptotically the stress and strain fields at a propagating crack_tip.
基于基本方程组和高玉臣、黄克智提出的应力场的渐近展开式作了渐近分析。
On the basis of the governing equations and the asymptotic expansion of the stress fields proposed by Gao and Hwang, a generally asymptotic analysis is performed.
利用渐近分析方法研究了远场来流引起的对流对过冷熔体中球状晶体的生长形态的影响。
The influence on the growth morphology of the spherical crystal in the undercooled melt imposed by the far field flow is studied by the asymptotic method.
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