变形梯度

本文基于变形梯度和分解定理（S-R定理）和拖带坐标描述法，应用有限元方法，计算了橡胶环直径方向受压接触大变形问题。

Based on the additional decomposition theorem of deformation gradient ( i. e. S-R theorem ) and co-moving coordinate technique , a typical nonlinear mechanical problem , contact large deformation of rubber ring radially compressed , was computed by FEM .

通过引入高阶变形梯度，合理地修正了传统Cauchy-Born准则在描述纳米管变形几何关系时所存在的缺陷。

In the present model , by including the second order deformation gradient tensor in the kinematic description , the limitation of the standard Cauchy-Born rule for the modeling of nanoscale crystalline films can be alleviated with less computational efforts .

关于有限变形梯度的和分解

On the " additive decomposition " of the finite deformation gradient

基于顶点变形梯度的点云曲面变形传输

Deformation Transfer for Point Set Surface Based on Vertex Deformation Gradient

关于平面问题中变形梯度的分解

On the decompositions of the deformation gradient of plane problems

增强假设变形梯度有限元方法稳定性计算

Stability of the enhanced assumed strain finite element method

变形梯度张量极分解中转动张量的直接表示及其应用

The exact representation of the rotation tensor in polar decomposition of deformation gradient and Its Applications

对变形梯度极分解的计算方法进行了分析，给出极分解计算的四种新方法：（1）增量叠加法；

In this paper , the polar decomposition of deformation gradient tensor is analyzed in detail .

变形梯度胶电泳分析喂养方式对早产新生儿肠道菌群的影响

Study of effects on intestinal microbiota between breast-feeding and formula-feeding premature neonates by PCR-denaturing gradient gel electrophoresis

提出了双线性双滑移、逐段线性双滑移的变形梯度张量的解析公式。

The analytical formulas for the deformation gradient arc obtained for bilinear path double slip and piece-wise proportional double slip .

对关于有限变形梯度的‘和分解’一文的答复

Author 's reply to the discussion article " on the ' additive decomposition ' of the finite deformation gradient "

本文通过变分途径建立了变形梯度张量的极分解和加法分解之间的联系。

Through a variational approach , the passage from the additive decomposition to polar decomposition of deformation gradient has been completed .

叙述中涉及了变形梯度、高阶变形梯度、温度、温度梯度和温升率描写的应力、偶应力和热流矢量。

Deformation , Deformation gradient , temperature , temperature gradient , temperature rising rate , stresses , couple stresses and thermal flux are used which .

本文提出了一种用于多层前馈神经网络训练的新算法，它把遗传算法与自适应变形梯度学习算法集成起来。

A new algorithm is presented for training multilayer feedforward neural networks by integrating a genetic algorithm with an adaptive conjugate gradient neural network learning algorithm .

伽师强震群的破裂断层面为北东向，与震源深度梯度变化带、地壳接触变形梯度变化带、等烈度线以及地震扩展方向吻合；

The rupture surface is to NNE , similar to gradient belt of focal depth , gradient belt of crustal deformation , isoseisms and extended direction of earthquakes .

用适应各种共轭应力应变变量的统一应力应变列阵、位移梯度列阵和变形梯度列阵及其统一列阵函数，表述了非线性弹性理论的基本方程和变分原理。

Introduces unified representations of conjugate stresses and strains , deformation and displacement gradients , basic equations and variational principles which are useful for numerical implementation of non-linear elasticity problems .

建立了局部（塑性）剪切变形梯度与局部（塑性）剪切应变分布之间的关系及速度梯度与应变率分布之间的关系。

The relation between the gradient of local ( plastic ) shear deformation and the local ( plastic ) shear strain and that between the gradient of velocity and the strain rate were established .

根据铁电铁弹材料单晶特性，提出在自极化过程中该材料能量密度是变形梯度和电位移向量的非凸函数。

In this paper , according to the characteristics of ferroelectric ferroelastic single crystals , the energy density is assumed to be the non convex function of transformation gradients and electric displacements in the process of polarization .

该算法是利用变形梯度乘法分解获得弹性变形梯度演化方程，用增量迭代法积分该方程，显式更新各滑移上的临界分切剪应力。

Single crystal kinematics based on a multiplicative decomposition of the deformation gradient is used to obtain an evolution equation for the crystal elastic deformation gradient . The primary advantage of the algorithm is that it provides an implicit integration of elastic deformation gradient .

为了实现胸部多模态医学图像的自动配准，提出了一种基于层次B样条自适应自由变形法和梯度下降法的配准方法。

Finally , realized the local fine registration of thorax multimodal medical images by a free-form deformation ( FFD ) based on hierarchical B-splines .

前屈曲耦合变形对功能梯度板稳定性的影响

Effect of Pre-buckling Coupling Deformation on Stability of a Functionally Graded Plate

在反平面变形下功能梯度压电板条的应力强度因子分析

Stress intensity factor analysis of a functionally graded piezoelectric strip under anti-plane deformation

基于自适应自由变形法和梯度下降法的胸部多模医学图像配准

Thorax multimodal medical image registration based on adaptive free-form deformation and gradient descent

冲击地压后变形破坏的梯度塑性理论

Gradient Plasticity Theory of Deformation Destroy after Rockburst

空间有限元分析表明，预应力混凝土箱梁的应力和变形对温度梯度模式的变化较为敏感。

The space finite element analysis indicated that the prestressed concrete box girder 's stress and the distortion are sensitive to the change of gradient of temperature pattern .

提出了岩石塑性变形的应变梯度理论，并采用该理论解释了岩石力学界长期争论的关于Ⅱ类岩石变形行为是否存在的问题。

In this paper the theory of plastic strain gradient has been put forward and thereby the problem is discussed on whether the deformational behaviour of the rock of class ⅱ is exist .

为了克服传统的蛇形算法不能收敛于边缘凹陷处以及对蛇的初始化过于敏感的缺点，本文提出用基于可变形模型的梯度矢量流方法提取乳腺X光片中的肿瘤区域。

In order to overcome the problems of traditional snake associated with poor convergence to boundary concavities and sensitive initialization , gradient vector flow based on deformable models is presented to segment tumor region .

基于光流场模型的Demons算法由于仅依赖图像灰度梯度使图像变形，当缺乏梯度信息时图像的变形方向不能确定，因而容易造成误配准，且该算法只适合于单模态图像配准。

An intensity-based automatic deformable image registration algorithm , known as the " Demons " algorithm , only depends on the image intensity gradients of the reference image to drive the floating image transform , it easily results in wrong registration when gradients are small , even being zeros .

同时轧件出变形区后温度梯度逐渐减小。

While as the temperature gradient is small out the deformation .

采用特征线方法对混合硬化情况下基于变形机制的应变梯度工程塑性理论的研究

A study on the conventional theory of mechanism-based strain gradient plasticity for mixed hardening by the method of characteristics