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一、回调机制概述：训练循环中的「钩子」 回调（callback）本质上是 在训练循环的特定时点被框架自动调用的一批可调用对象。MXNet 的训练入口（ Module.fit 与旧的 FeedForward.fit ）在代码中预留了若干回调挂载点，训练引擎每完成一个 batch 或一个 epoch，就会把当前训练状态包装成参数，调用你注册的 ...

文章浏览阅读219次。在混合开发中，原生与 JavaScript 层的通信是构建复杂功能的基础。React Native 通过桥接层实现跨语言调用，但常规认知往往停留在 JS 调用原生模块，反向调用则因文档缺失而难以上手。理解原生到 JS 的调用本质，需先明确桥接层的异步消息机制与 JSON 序列化约束，这决定了所有 ...