Complete backward doc #3709
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Complete backward doc #3709
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Add the "Backward Operator Registry" section
… complete_backward_doc
… complete_backward_doc
… complete_backward_doc
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dzhwinter
reviewed
Aug 28, 2017
paddle/framework/backward.md
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| In Neural Network, the backpropagation algorithm follows the chain rule, so we need to compound the fundmental gradient operators/expressions together with chain rule . Every forward network need a backward network to construct the full computation lineage, the operator/ expression's Backward feature will generate the backward pass respect to forward pass. | ||
| In Neural Network, the backpropagation algorithm follows the chain rule, so we need to compound the fundmental gradient operators/expressions together with chain rule . Every forward network need a backward network to construct the full computation lineage, the operator/expression's backward pass will be generated respect to forward pass. |
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lineage => graph, I should not introduce new concept into the design doc.
paddle/framework/backward.md
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| | ---------------------- | ---------------- | -------------------------------- | | ||
| | **Operator::inputs_** | Inputs | Inputs, Outputs, OutputGradients | | ||
| | **Operator::outputs_** | Outputs | InputGradients | | ||
| -| | forward operator | backward operator |
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format error. - appear in the form left.
paddle/framework/backward.md
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| grad_op_builder(fengjiayi) | ||
| ```cpp | ||
| REGISTER_OP(add_two, AddTwoOp, AddTwoOpMaker, add_two_grad, AddTwoGradOp); |
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replace with another operator, please. Otherwise, the user may be confused with the Generic Add in backward network construction.
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done. use MulOp instead.
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update backward documents