The purpose of the study is to determine the characteristics that influence students' performance and satisfaction with online classes during the COVID-19 epidemic. Most worldwide industries were affected by the pandemic caused by a coronavirus epidemic. This includes the academic community, which is made up of millions of enrolled students and working teachers who had previously attended regular classes in their institutions but were forced to stay at home owing to the pandemic. In the majority of nations, including India, the online class was established to continue the educational process. This style involves the use of electronic gadgets, which are still quite new to the teaching-learning community as a whole, for both teaching and learning. The objective of this study is to evaluate how well teachers and students responded and tackled that situation of online Education.

:  In order to understand the influence of ground vibration on buildings. Based on the theoretical analysis, this paper uses ANSYS software to establish the finite element model of four-layer steel structure. Understanding its vibration characteristics through modal analysis and harmonic response analysis and optimizing its structure

In this paper, COMSOL simulation software is used to analyze the characteristics of the single-channel particulate matter capture device. The effects of inlet velocity and porosity of porous medium layer on soot layer thickness were analyzed by model validation, and the following conclusions were obtained: the shear rate near the wall of the inlet is larger, the closer to the center of the inlet, the smaller the shear rate, and the shear rates on the center line of the intake channel are smaller. The greater the porosity, the greater the amount of particulate matter through the porous media, and the less the accumulation of particulate matter in the soot layer.