irreducible

By diagenesis compaction and filling of clays, the formation of the reservoir is characterized by small pore throat radius, complex pore structures, rich irreducible water saturation, and small resistivity difference between oil layer and water layer.

后经成岩压实作用及粘土矿物的充填，造成孔喉半径变小，孔隙结构复杂，孔隙空间对水的滞留能力加强，束缚水饱和度高，油层与水层电阻率差别减小，电阻率增大指数小于3。

In terms of the Racah irreducible tensor operator technique and Winger theorem, the energy matrices and the electron paramagnetic resonance ( EPR) theory of the full-configuration state of for d 3 ( C 3 υ) electric configuration state have been derived.

利用Racah不可约张量算符法和Winger定理，建立了d3（C＊3υ）电子组态的能量矩阵及其全组态EPR理论；

Based on the V-partition coupling coefficients from a group to its subgroup, a general relationship between the reduced matrix element of irreducible tensor operator of a group and that of its subgroup is obtained.

本文运用唐敖庆等引入的群到子群V系数，首先导出了群的不可约张量算子约化矩阵元与其子群的不可约张量算子约化矩阵元间的简单关系式。