AC-DC electric locomotive generally used feedback-resistor braking mode, which took energy from traction power network to ensure the cooling fan working, resulting in great resources waste and environmental pollution.So, a kind of energy feedback Vacuum Wine Pumps solution applied to the braking mode of AC-DC electric locomotive was presented.Princ
[Introduction] Accurate calculation of the hydrodynamic coefficients for floating structures and the investigation of the flow field distribution around floating bodies on the marine free surface are essential for improving the engineering design and application of marine structures.[Method] This study utilized the computational fluid dynamics (CFD
There has been much speculation in the past years about self-publishing.Some argue that publishing houses do not have a future as publishing Vacuum Wine Pumps service providers.Others claim that it is very easy to publish a book as an e-book.There are many success stories of self-publishers.More and more authors are wondering if they actually need
At the beginning of 2020, many areas in China have been affected by Corona Virus Disease 2019 (COVID-19), which is strong infectivity.Because of the mobility of the personnel in the blood purification centers, the dialysis patients with low resistance and the particularity of the treatment environment where the patients congregate, it has become a
The screening of several Chinese mangrove plants for insecticidal principles showed that ethanol extract of Ceriops tagal stems and twigs possessed significant feeding deterrent activity against the red flour beetle, Tribolium castaneum (Family: Rhizophoraceae).From the ethanol Dong Quai (Angelica) extract, three feeding deterrent diterpenoids were