The results show that winter wheat exhibits strong anisotropic characteristics in the solar principalplane.
结果表明：冬小麦在太阳主平面呈现出强烈的各向异性反射特性。
2
An equation for the calculation of true shear strain was derived from the integration of infinitesimal shear strain in plane shearing process with constant principal shear strain direction.
对切应变主轴不变的平面简单切变过程，通过无穷小应变的积分，导出了真实切应变计算公式。
3
The Mohr-Coulomb model is based on plotting Mohr's circle for states of stress at failure in the plane of the maximum and minimum principal stresses.