The evolution opera tor, the reduce density operator and the dynamical properties of the field entropy evolution in the intensity - dependent coupling multiphoton J - C model are studied.
研究了依赖强度耦合多光子J—C模型的演化算符，约化密度算符及其场熵特性。
In order to reduce radiation on the operator, a remote-control nuclear surface moisture-density gauge is developed by improving the original nuclear surface moisture-density gauge.
为减少放射源对仪器操作人员辐射的影响，对表层型核子水分-密度仪进行了改进，研制出遥读遥测式表层型核子水分-密度仪。
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