Update 09.md

docs/1.7/09.md

 # PyTorch：张量
 
 > 原文：<https://pytorch.org/tutorials/beginner/examples_tensor/polynomial_tensor.html#sphx-glr-beginner-examples-tensor-polynomial-tensor-py>
+>
+> 校对：DrDavidS
 
 这里我们准备一个三阶多项式，通过最小化平方欧几里得距离来训练，并预测函数 `y = sin(x)` 在`-pi`到`pi`上的值。
 
@@ -60,5 +62,3 @@ print(f'Result: y = {a.item()} + {b.item()} x + {c.item()} x^2 + {d.item()} x^3'
 [下载 Python 源码：`polynomial_tensor.py`](https://pytorch.org/tutorials/_downloads/38bc029908996abe0c601bcf0f5fd9d8/polynomial_tensor.py)
 
 [下载 Jupyter 笔记本：`polynomial_tensor.ipynb`](https://pytorch.org/tutorials/_downloads/1c715a0888ae0e33279df327e1653329/polynomial_tensor.ipynb)
-
-校对：DrDavidS
\ No newline at end of file