Abstract: A method, device, system, and storage medium for tracking a moving target are provided. The method uses three-dimensional radar observation data to construct a state vector and a motion model of the moving target, thereby to construct a state equation and an observation equation for achieving filtering and tracking within a linear Gaussian framework. The disclosure is also suitable for a moving target in a two-dimensional scene with a distance and an azimuth, and the disclosure use a two-dimensional observation vector to construct a dynamic system to achieving tracking of the moving target. The disclosure can be used in radar systems containing Doppler measurements, and tracking of moving targets can be implemented by performing dimension-expansion processing on observation equations.

Abstract: The present invention relates to the direction code for encoding Chinese characters using English alphabet and the inputting method thereof. While encoding a Chinese character, constructing the English letters that exist in said character according to horizontal stroke " ", vertical stroke " ", left-slanting stroke " " and right-slanting stroke " " of Chinese characters, decomposing said character into a combination of certain actual postures among 161 ones of the letters according to order of strokes and rules of the order of strokes, said combination of postures being limited to 6 direction patterns, said letters being in 8 positive directions and 8 inverted directions presented by the letters respectively, said combination of the letters being the direction code of said Chinese character.