∑jbijajk={1i≠k,0i=k. 这就是Kronecker Delta符号。 由此我们可以引出逆变张量(ContraVariant Tensor)怎么理解呢? 基底变化是协变,那么对应的张量就是逆变。 举个例子: 在常见的平面坐标系中,坐标基底为ei=(1,0),ej=(0,1),有一个一阶张量v→=(2,2)。这个时候,我们发了神经病,不想用上面的基底,...
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δij is the Kronecker delta, εij represents the strain tensor of the crystal lattice, and the superscript a denotes the partial molar values of componen... Shimizu,Ichiko - 《Philosophical Magazine A》 被引量: 23发表: 1997年 The Relational Attributes of the Meaning of Literary Works The mea...