Update index.rst

Author: hweifluids

source/index.rst

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 PyFTLE3D: Research Toolkit for 3D Lagrangian coherent structures with GUI
 ===================================================
 
-* Notice: The toolkit is undergoing an internal testing. Who would like to use it in advance to release, please feel free contact me.
-The planned release time is 2025.06 - 2025.07, while the author still holds the right to change the release time.*
+* Notice: The toolkit is undergoing an internal testing and currently not released. Who would like to use it in advance to release, please feel free contact me.
+The planned release time is 2025.06 - 2025.07 with high-freedom opensource license type, while the author still holds the right to change the release time.*
 
 PyFTLE3D is a Python-based research toolkit for computing and visualizing
 Lagrangian coherent structures (LCS) in three-dimensional fluid flows and other complex systems by computing Finite Time Lyapunov Exponent.
-Coming with GUI and integrated environment, it is designed to be user-friendly and accessible, allowing peers to easily analyze and visualize LCS in their data,
-with no need for researchers to have extensive programming knowledge.
-Certainly, it is also suitable for those with programming experience who want to customize their analysis
-with multiple OOTB numerical methods, with various computation density, accuracy, and focus preferences.
+Coming with GUI and integrated environment, it is designed to be user-friendly and accessible, allowing peers to easily analyze and visualize LCS in their data
+with multiple OOTB numerical methods, with various computation density, accuracy, and focus preferences,
+with no need for researchers to have any programming knowledge.
+Certainly, it is also suitable for those with programming experience who want to customize their analysis.
+
+The computation is accelerated by CUDA, the NVidia treasure, achieving over 30x speedup compared to the CPU version.
 
 nekRS is a computational fluid dynamics code developed at :term:`ANL`, :term:`UIUC`, and :term:`PSU`.
 nekRS aims to leverage the present trend in :term:`GPU`-based :term:`HPC` systems to perform