Linear approximate segmentation and data compression of moving target spatio-temporal trajectory can reduce data storage pressure and improve the efficiency of target motion pattern mining. High quality segmentation and compression need to accurately select and store as few points as possible that can reflect the characteristics of the original trajectory, while the existing methods still have room for improvement in segmentation accuracy, reduction of compression rate and simplification of algorithm parameter setting. A trajectory segmentation and compression algorithm based on particle swarm optimization is proposed. First, the trajectory segmentation problem is transformed into a global intelligent optimization problem of segmented feature points, which makes the selection of segmented points more accurate; then, a particle update strategy combining neighborhood adjustment and random jump is established to improve the efficiency of segmentation and compression. Through experiments on a real data set and a maneuvering target simulation trajectory set, the results show that compared with the existing typical methods, this method has advantages in segmentation accuracy and compression rate.

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Under the condition of informatization, the system efficiency will be seriously challenged by the intervention of opponents in the electromagnetic field. With the complexity of the electromagnetic environment in the future, the types of electromagnetic threats faced by mobile launch rockets are increasing. The adaptability to the complex electromagnetic environment has become the key factor whether they can complete the launch mission as planned. Taking the mobile launch rocket as the research object, this paper analyzes the main electromagnetic threats faced by it, such as electronic reconnaissance, electronic jamming, electronic destruction and precision strike, and puts forward the basic scheme of electromagnetic threat environment simulation required for relevant electromagnetic environment adaptability test. The research has direct guiding value for testing the electromagnetic threat response ability of mobile launch rocket and promoting its application and efficiency in complex electromagnetic environment.