Provide a detailed explanation of the process of neural network training, including the key steps and components involved. Your answer must contain a title, wrapped in double angular brackets, such as <<poem of joy>>. Use the following sections: <<Introduction>>, <<Key Components>>, <<Training Process>>, and <<Conclusion>>. Mark the beginning of each section with SECTION X, such as: SECTION 1. SECTION 1 should be the Introduction, SECTION 2 should be Key Components, SECTION 3 should be Training Process, and SECTION 4 should be Conclusion. Ensure that the letter 'e' appears at least 10 times in your response.

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