The research achievements in Economics are of great academic value, and the strength for research is well recognized in the field of Economics around China. Instructed by Prof.
中山大学理论经济学科研成果具有较高的学术价值，在经济学领域的研究实力得到了国内经济学界的认可。
The remanence and the critical field refers to the field that makes the magnetization transit from positive value to negative value, are studied at various strength of the dipolar interaction.
同时研究了不同偶极相互作用强度下的剩磁和使磁化强度平行于外场方向分量由正变为负的临界场。
However, in coaxial oil-paper combination insulation when the thickness of insulation exceeds a certain value the field strength within the pressboard under polarity reversal will increase instead.
但在同轴油纸复合绝缘中，当绝缘厚度超过一定值后，纸中极性反转场强反而增加。
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