The medium voltage DC (MVDC) type system can connect multiple terminals to a common MVDC bus, so it is possible to connect several renewable DC power sources to the common MVDC bus, but a DC circuit breaker is needed to isolate short circuit accidents that surf accessories may occur in the MVDC bus.For this purpose, the concept of a hybrid DC circu
The Tribological Reduction Mechanism of the Rubber Hexagonal Surface Texture of the Screw Pump Stator
This paper develops a composite weaving structure, combining hexagonal micro-bumps and hexagonal grooves, in the design of the rubber surface of the screw pump.This allows us to solve the problem of high torque and fast wear of the rubber stator during the operation of screw pump lifting oil recovery, based on the bionic hexagonal surface structure
Active pendulum vibration absorber utilizing a rotating inertia actuator with time delay in the position feedback
This paper presents a comprehensive analysis of an active pendulum vibration absorber (APVA) that utilizes a rotating inertia actuator (RIA) and takes into account the time delay in the position feedback.Here, the primary system is represented as a base-excited system, which includes a linear spring, damper, and mass.The absorber consists of a pend
Molecular Characterization of the Viral Structural Genes of Human Rhinovirus A11 from Children Hospitalized with Lower Respiratory Tract Infection in Kunming
Background: The human rhinovirus (HRV) is a picornavirus that can cause a variety of respiratory diseases, including the aggravation of chronic respiratory diseases, such as bronchitis, pneumonia, and asthma.Although an increasing number of lower respiratory tract infection cases have been reported with HRV infection in Europe, few such cases have