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In order to solve the problem of selecting missile health state evaluation indexes and the mapping relationship between the selected indexes and missile health state, a missile health state prediction method based on CA-RBF neural network is proposed. Firstly, the influencing factors of missile health state are analyzed through missile life profile, and the quantitative method is given. Then, the corresponding analysis (CA) method is used to screen the influencing factors of missile health state. Taking the selected factors and the evaluation results of missile health state as the input and output of neural network, the training samples of RBF neural network are established to predict the missile health state. Finally, an example is given to illustrate the practicability and effectiveness of the proposed method. This method can provide a new idea for the selection of missile health state indexes and missile health state prediction, and provide a basis for missile preventive maintenance decision-making.

For the sake of successful recovery of the embarked aircraft, the research of timing abeam is carried out to solve the problem of accurate distance on the downwind leg in the landing pattern. The glide slope distance of the aircraft can be extended for the motion of the sailing carrier, the ground velocity of the aircraft is naturally increased on the downwind leg and the flight path of the aircraft could be shifted when turning down in the landing pattern because of the natural wind. The factors above have great impact on recovery and should be taken into consideration, thus a model of the timing abeam for the aircraft on landing pattern is presented based on the flight dynamics theories and the numerical analysis is conducted with the model. The numerical simulation suggests that the method of the model is suitable for different types of the conventional take-off and landing fixed-wing carrier aircraft with different weights and munitions, and reasonable results can be obtained through the model. [ABSTRACT FROM AUTHOR]

The studies of the Dream o f the Red Chamber roughly experience a classical period, a recent to modem period and a current period. Monographs in the new period about the history of redology can typologically be classified as those that focus on historical periodisation, those on the study of redological figures, those on methodologies, and those on redology in different countries, etc. Researchers in the past managed to summarise the studies of redology that they could cover from their perspectives. However, due to the limitation of their materials or their approaches, their studies cannot really avoid flaws and points they overlooked in their interpretations, and cannot really capture the history of the acceptance of Dream of the Chamber. Through an exploration of the blind spots in their studies and the discovery of new academic possibilities, this paper tends to study redology from the new perspective of school criticism and to systematically study the genealogy of redology from the perspective of cultural development. It is a study that is to propel the development of redology, a fact that is congruent with the development of academic history. [ABSTRACT FROM AUTHOR]