Build custom CAD designs with natural language prompts by integrating ChatGPT 6 Astra and FreeCAD. Output precise Python code for 3D printing.
Detailed python notes & code for lectures and exercises of Andrej Karpathy's course "Neural Networks: Zero to Hero." The course is focused on building neural networks from scratch. A complete neural ...
GitHub Blueprint — Zero to Hero learning platform for Git and GitHub. Covers version control, branching, pull requests, merge conflicts, GitHub Actions CI/CD, and GitHub Pages deployment. 10 hands-on ...
Python 控制流 : autograd 支持动态图,可在前向过程中使用 if 、 while 等原生 Python 控制流且仍能正确反向传播; 自定义头梯度 :将外部计算得到的头梯度传给 backward (dzdy) ,利用链式法则计算非 MXNet 部分的梯度。
这个过程完全在C++层完成,Python层只提供调度接口。 这就解释了为什么自定义 autograd.Function 必须重写 forward 和 backward 静态方法: forward 返回的是新Tensor(带新的 grad_fn ), backward 返回的是输入梯度(供上游Node消费)。