Based on the review of the fracture development rules in inter-bed layered fractured rock mass, the fracture network generation method was provided, and then the double medium model was introduced.

The Effects of Double Dynamic Medium Frequency Electrostimulation on Nerve Conduction

双动态调幅中频电流对神经传导的影响

Measurement of Fracture and Porous Porosity in Double Medium of Daqing Oil Field by X CT Imaging Process

利用X-CT研究大庆油田双重介质裂缝和砂岩孔隙度

The fracture-hole double medium porosity mode develops distinctly in the research area, fracture and secondary bole-hole are the most important reservoir type and accumulating space for oil.

贝尔凹陷布达特群地层裂缝&孔（洞）双介质储集特征明显，裂缝和次生孔洞是布达特群潜山储集层的重要储集类型和储集空间。

Characteristics and model researches of the seepage flow in double medium karst fracture networks at Jiaozuo coal mining area

焦作矿区双重介质裂隙网络渗流与渗流模型研究

It is realized from long time asymptotic solutions that there are two steps at the pressure curve of triple medium, one step at the pressure curve of double medium, and no step at the pressure curve of porous medium.

从长时渐近解可知，三重介质的压力曲线有两个台阶，双重介质的压力曲线有一个台阶，单一介质的压力曲线没有台阶。

Double-medium Model of Gas Movement in Mining Influence Space

采动空间瓦斯运动的双重介质模型

In this paper, we consider a quadratic Lagrangian finite element equation arising from discretizations of3D elliptic problem with jump coefficients under any tetrahedral partition.

本文针对带有间断系数的三维椭圆问题，讨论任意四面体剖分下的二次拉格朗日有限元方程的代数多重网格法。

Quadratic Finite Volume Element Method Based on Optimal Stress Points for Solving Two-point Boundary Value Problems

解两点边值问题的基于应力佳点的二次有限体积元法

Calculation of Internal Forces of Elastic Structures by Using Quadratic Boundary Element Method

用二次边界单元法计算弹性结构的内力

Mises yield condition and imitate moment yield limit with an exponent curve. Taken advantage of DKT plate element and a kind of compatible quadratic plane element including vertex rotations, an ideal shell element is formed.

Mises屈服条件，并对弯矩屈服极限用一指数曲线模拟，利用DKT板元和一种带有角点转角自由度的相容二次平面元来组成一种理想的平壳元。

In this method, the whole area is divided into many quadratic isoparametric element by means of finite element method, then the contour line in each isoparametric element is generated, thus the whole contour is assembled.

该算法根据有限元法将整个区域分割成多个互相连续的二次等参单元，通过生成每个等参单元内的等值线，进而生成整个区域内的等值线。

An Algebraic Multigrid Method of Quadratic Lagrangian Finite Element Equations Under the Unstructured Quadrilateral Grids

求解非结构四边形二次拉格朗日有限元方程的代数多重网格法

BEM with single-node quadratic element in crack analysis

裂纹分析中的单节点二次边界元

Asymptotically exact a-posteriori error estimators for the Quadratic Triangular Element in sense of point to point

二次三角形元逐点意义下渐近准确后验误差估计

Error Estimate for a Quadratic Nonconforming Finite Element on Quadrilaterals

一种二次非协调四边形有限元的误差估计

FEM using adaptive topography and quadratic element in 2D MT forward modeling heating of an insulator by a high-frequency electric field.

自适应地形电磁场双二次变化MT二维有限元数值模拟用快速变化的电磁场对非导电体加热。

The Application and Its Accuracy of Singular Quadratic Isoparametric Element

等参奇异裂纹单元的研究等参数畸变元在计算带裂纹结构应力强度因子中的应用和精度

In this thesis, we mainly study supercloseness of quadratic serendipity block finite element method for three-dimensional variable coefficient elliptic problems.

本文主要研究三维变系数椭圆方程二次奇妙族有限元方法的超逼近。

A Kind of Quadratic Superconvergence Finite Volume Element Method for One Dimensional Elliptic and Parabolic Equations

一维椭圆和抛物方程的超收敛二次有限体积元方法

Axisymmetric Isoparametric Quadratic Boundary Element Analysis of Piston Temperature Field of Diesel Engines

内燃机活塞温度场二次等参轴对称边界元分析