In the course of using precise visual instrument, aiming precision is an important parameter to analyze the measurement error. Usually, instrument calibrated er
A static approach method method is used to get the spectrum expression of the pulse interval modulation signal.The expression is simple,has a clear physical con
A new organic semiconductor tartaric acid doped salt of emeraldine polyaniline(PANI-C4H6O6)has been obtained by the method of oxidative polymerization of monome
Using the ray trace method,three-section semiconductor lasers are studied .An analytic expression of output power for the three-section semiconductor lasers is
The program process of the longitudinal impurity profile introduced in the quantum well(QW)laser and microwave electronic materials in analysed,based on the gro
The elimination of zig-zag defects in polyimide-coated surface-stabilized ferroelectric liquied crystal(SSFLC)cells is carried out by appliying a low-frequency
The significance of research of water system is demonstrated by the expriments and statistical data.Some physical and chemical properties of water system affect