Secondary clarifier is one of the most commonly used unit operations in wastewater treatment plants.It is customary designed to achieve solids separation from biologically treated effluent through clarification of biological solids and thickening of sludge.As treatment plants receive increasingly high wastewater flow, conventional sedimentation tan

Deoxyribonucleic acid (DNA), a genetic material, encodes all living information and living characteristics, e.g., in cell, DNA signaling circuits control the transcription activities of specific genes.In recent years, various DNA circuits have been developed to implement a wide range of signaling and for regulating gene network functions.In particu

Category: Hindfoot Introduction/Purpose: Autogenous bone graft remains the standard bone graft in foot and ankle surgery when filling a bone void or adding biology to an arthrodesis site.Harvesting autograft can have serious donor site morbidity with an average complication rate of 8% and reports as high as 25%.Complications range from persistent p

Several in common use flowrate control methods in semiconductor wafer clean tool are introduced in this paper, including the flowrate control of process chamber and chemical proportioning, then corresponding control methods are brought forward according to different applications.The chemical flowrate is directly used as the feedback signal of close