This article was originally published by MDPI, Basel, Switzerland on 31 December 2020, and has been republished in accordance with the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License.
ບົດຂຽນນີ້ຖືກຈັດພີມມາໃນເບື້ອງຕົ້ນໂດຍ MDPI, Basel, ສະວິດເຊີແລນໃນວັນທີ 31 ທັນວາ 2020, ແລະໄດ້ຖືກພິມເຜີຍແຜ່ຄືນ ໃຫມ່ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 ໃບອະນຸຍາດສາທາລະນະສາກົນ.