Applying the theory of relativistic quantum field, the paper puts forward an approximate method to calculate electronic energy band with relativistic Green Function.
运用相对论量子场理论，提出了一个相对论格林函数计算能带的近似方法。
The energy band structures were studied with the method of EHMO/CO for transition metal phthalocyanines.
用EHMO/CO方法对过渡金属酞菁化合物的能带结构进行了研究。
By studying the principle of hearing system in identification of sound signal, a method of feature extraction for passive sonar target based on critical band spectrum energy is proposed.
利用被动声纳目标辐射噪声特征主要集中在低频部分的特点，结合听觉系统识别声音信号的原理，提出了一种被动声纳目标临界频带频谱能量的特征提取方法。
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