code: def squareplus(x: ArrayLike, b: ArrayLike = 4) -> Array:
      r"""Squareplus activation function.
  
      Computes the element-wise function
  
      .. math::
        \mathrm{squareplus}(x) = \frac{x + \sqrt{x^2 + b}}{2}
  
      as described in https://arxiv.org/abs/2112.11687.
  
      Args:
        x : input array
        b : smoothness parameter
      """
      numpy_util.check_arraylike("squareplus", x)
      numpy_util.check_arraylike("squareplus", b)
      x = jnp.asarray(x)
      b = jnp.asarray(b)
      y = x + jnp.sqrt(jnp.square(x) + b)
      return y / 2
  
imports: from __future__ import annotations
  from functools import partial
  import operator
  import numpy
  from typing import Any
  import jax
  import jax.numpy
  from jax import custom_jvp
  from jax import lax
  from jax._src import config
  from jax._src import core
  from jax._src import dtypes
  from jax._src import util
  from jax._src.core import AxisName
  from jax._src.numpy import util
  from jax._src.typing import Array, ArrayLike
  from jax._src.ops.special import logsumexp
label_desc: Use image node_id 2 for calling a global function with example usage: squareplus(x, b) and returns: unknown