The application of classification based on Gaussian process has received more and more attention in recent years. <br>In addition, the Gaussian process classification is combined with some classic algorithms to form some practically valuable deformation algorithms, such as the Gaussian process with constraints. Again, the Gaussian process is a model based on nuclear technology. Non-linear learning is an important challenge in the process of machine learning model and algorithm design. Kernel trick, as a powerful tool to realize model nonlinear learning, has been widely used in machine learning, pattern recognition and other fields in recent years. As a special covariance function, the kernel function can be used to construct (or directly replace) the covariance function in the Gaussian process, so as to realize the nonlinear learning of the Gaussian process model. At the same time, in the process of model optimization, the Gaussian process model can optimize the hyperparameters contained in the kernel function by maximizing the marginal likelihood, which effectively reduces the computational cost of the kernel function parameter selection.
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