...τ τ φ φ φ φ d d U N U U B A B A r r r r r r 2 ∗ ∗ ∫∫ = − (1.57) 上式中的积分称作 交换积分 ( exchange integral )，因为积分式中兩个单粒子态作 了交换。
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共振积分常常叫做交换积分。
The resonance integral is often called an exchange integral.
给出了一种代数法交换积分次序的方法，避免了作积分区域图的麻烦。
The article introduces a method in which the order of quadratic integral can be exchanged with the knowledge of elementary.
结果表明，不同构象下各体系有效交换积分值都小于零，自由基间表现为反铁磁性耦合。
The results show that the effective exchange integral values are less than zero under different conformations, so the radicals display the anti-ferromagnetic coupling.
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