Update notebooks

[dachengx]

Just update notebooks.

The test is under the environmental variables setting:

# export XLA_PYTHON_CLIENT_PREALLOCATE=false
unset XLA_PYTHON_CLIENT_PREALLOCATE
# export XLA_PYTHON_CLIENT_ALLOCATOR=platform
unset XLA_PYTHON_CLIENT_ALLOCATOR
# export DO_NOT_USE_APPROX_IN_BINOM=1
unset DO_NOT_USE_APPROX_IN_BINOM

unset DO_NOT_USE_APPROX_IN_BINOM will use Normal as an approximation of Binomial which will greatly increase run speed.

For XLA_PYTHON_CLIENT_PREALLOCATE and XLA_PYTHON_CLIENT_ALLOCATOR, one can check reference: https://jax.readthedocs.io/en/latest/gpu_memory_allocation.html

[github-actions]

Pull Request Test Coverage Report for Build 5041890193

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 80.159%

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Totals
Change from base Build 5041849530:	0.0%
Covered Lines:	1818
Relevant Lines:	2268

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💛 - Coveralls