Projection pursuit and Z-shaped function based assessment method for marine environmental influence on offshore military activity

Abstract

The present invention provides a projection pursuit and Z-shaped function based assessment method for a marine environmental influence on an offshore military activity. The specific steps are as follows: 1. performing normalization processing on marine environmental factor indexes that influence the security of a military activity; 2. based on a projection pursuit technology, performing dimension reduction on a normalized index sequence; 3. determining a projection vector; 4. establishing a Z-shaped function assessment model of a degree of the marine environment on the security of the military activity and a projection value; 5. establishing a nonlinear optimization model to estimate Z-shaped function parameters; and 6. verifying validity of the new method. According to the method provided by the present invention, a complex nonlinear assessment model is obtained by coupling the projection pursuit technology and the Z-shaped function, the model parameters are all determined by observed data and have relatively strong objectiveness, so that the precision of environmental influence assessment of offshore military activity security is improved. the new model has no requirements on the data volume, and has wide adaptability and practicality.

Description

technical field [0001] The present invention relates to an environmental impact assessment method for the safety of maritime military activities, and specifically seeks a method for dealing with incomplete data information, objectivity, non-linearity and fine precision, which is based on projection tracking and Z-type function for maritime military activities. Environmental Impact Assessment Methods. Background technique [0002] Marine environmental factors are important battlefield factors that affect weapons and military activities. All aspects or links of military activities are affected and restricted by marine environmental factors to varying degrees. Objective analysis and quantitative assessment of the impact of marine environmental factors are important factors in military meteorology and hydrology. important task of safeguarding. The commonly used evaluation method for the marine environment to affect the safety of military activities is the comprehensive index me...

AI Technical Summary

Problems solved by technology

The proposal of nonlinear assessment model has promoted the research of marine environmental risk assessment to a certain extent, but there are still some limitations

The significant advantage of the data envelopment analysis method is that it does not require any weight assumptions and has strong objectivity, but there are also some defects, such as the problem of excessively high evaluation values, which may cause unrealistic or untrue evaluation results

The biggest problem in Bayesian network modeling is the setting of Bayesian parameters, including the setting of the prior probability of the root node and the setting of the conditional probability of the non-root node. The determination of the probability requires a large amount of statistical data, and the experiment and Meteorological and hydrological environmental impact parameters and sample cases in exercises are often extremely rare, and it is difficult to obtain sufficient statistical data, that is, the data information is incomplete

[0004] Although the cloud model and the normal information diffusion model can be used to solve the military marine environmental impact assessment with complete data information, they are both limited to processing data information that generally obeys a normal distribution, and there are some non-normal data in the real ocean. In addition, the cloud model can only obtain discrete risk level values, and cannot describe the transition between levels, and the accuracy is relatively rough

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