mindspore.ops.selu

mindspore.ops.selu(input_x)[source]

Activation function SeLU (Scaled exponential Linear Unit).

The activation function is defined as:

\[E_{i} = scale * \begin{cases} x_{i}, &\text{if } x_{i} \geq 0; \cr \text{alpha} * (\exp(x_i) - 1), &\text{otherwise.} \end{cases}\]

where \(alpha\) and \(scale\) are pre-defined constants(\(alpha=1.67326324\) and \(scale=1.05070098\)).

See more details in Self-Normalizing Neural Networks.

SeLU Activation Function Graph:

Parameters: input_x (Tensor) – Tensor of any dimension, the data type is int8, int32, float16, float32, or float64 (CPU, GPU only).
Returns: Tensor, with the same type and shape as the input_x.
Raises: TypeError – If dtype of input_x is not int8, int32, float16, float32, or float64.

Supported Platforms:: Ascend GPU CPU

Examples

>>> import mindspore
>>> import numpy as np
>>> from mindspore import Tensor, ops
>>> input_x = Tensor(np.array([[-1.0, 4.0, -8.0], [2.0, -5.0, 9.0]]), mindspore.float32)
>>> output = ops.selu(input_x)
>>> print(output)
[[-1.1113307 4.202804 -1.7575096]
[ 2.101402 -1.7462534 9.456309 ]]