With the gradual increase in mining depth of coal fields in North China, the threat posed by karstic Ordovician limestone water to the safe stoping of mines is becoming increasingly prominent.Investigating the water-resisting property of the filling zone on the top of the Ordovician limestone provides the key to safe mining under pressure.This pape
There are a huge number of harmonics in the railway power supply system.Accurately estimating the Body harmonic impedance of the system is the key to evaluating the harmonic emission level of the power supply system.A harmonic impedance estimation method is proposed in this paper, which takes the Gaussian mixture regression (GMR) as the main idea,
Refined vaccines and adjuvants are urgently needed to advance immunization against global infectious challenges such as HIV, hepatitis C, tuberculosis and malaria.Large-scale screening efforts are ongoing to identify adjuvants with improved efficacy profiles.Reactogenicity often represents a major hurdle to the clinical use of new substances.Yet, i
Concrete is the most widely used construction material in Dugouts civil engineering.But plain concrete is a brittle material and has little resistance to cracking.The cracking in concrete promotes deterioration such as the corrosion of reinforcing rebar, therefore, repair in filling the crack is often carried out.Recently, repair methods using bio-