Objective Due to the characteristics of strong permeability and high water content in water-rich sand layer, the poor muck improvement can easily cause accidents such as spout spilling of screw conveyor and mud cake formation on the cutter plate during shield tunneling, thus affecting shield construction efficiency.So it is necessary to study the m

As internet-based technologies increasingly colonize learning environments in higher education, they allow purposes contrary to learning to have direct access to students.The internet as a governing metaphor for transparent connectivity and equal access is a red herring because the power relations across the connections are unequal.The internet als