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when armament projecting on fixed target is conducted, the deviation of the actual position of the impact point relative to the predetermined position has substantial randomness, causing difficulty in the analysis of armament scale or concentrated application effect. By building sequence coordinates for impact point coordinate components according to certain rules, with the distribution theory of multiple random variables(probability theory), obtain the regularity that the expected sequence coordinates of individual impact points "on the straight line which can be expressed by math"; meanwhile, put forward a simple and convenient method of calculating the average and variance of impact point sequence coordinates of individual through key coefficients and lay foundation for making researches on the evaluation of armament application efficiency and optimization of firing parameters. x   , , j j y x r . Arrange the X components of n impact point coordinates in the sequence from small to large,

The Analysis of the Dispersion Characteristic of Impact Point Sequence Coordinates with Armament Projecting on Fixed Targets