One-pot synthesis and hydrogen peroxide electrochemical sensing of 3D TiO/MnO nanorods assembled microspheres.

Nanorods assembled 3D microspheres of TiO/MnO were prepared via a simple one-pot hydrothermal approach. The resultant composite material exhibited remarkable electrocatalytic activity for hydrogen peroxide (HO) in comparison to each single component. The electrochemical sensor constructed with TiO/MnO exhibited a linear relationship within the range 0.

Application of a Novel and Improved VGG-19 Network in the Detection of Workers Wearing Masks.

In order to work and travel safely during the outbreak of COVID-19, a method of security detection based on deep learning is proposed by using machine vision instead of manual monitoring. To detect the illegal behaviors of workers without masks in workplaces and densely populated areas, an improved convolutional neural network VGG-19 algorithm is proposed under the framework of tensorflow, and more than 3000 images are collected for model training and testing. Using VGG-19 network model, three FC layers are optimized into one flat layer and two FC layers with reduced parameters.

A study of vibroacoustic coupling between a pump and attached water-filled pipes.

This paper presents a model for the vibroacoustical behavior of a pump coupled with water-filled pipes. Coupling between (a) the pump and the inlet and outlet pipes, and (b) the pipe wall and the fluid contained in the pipe, is investigated through analytical modeling and numerical simulation. In the model, the pump is represented by a rigid body supported by multiple elastic mounts, and the inlet and outlet pipes by two semi-infinite water-filled pipes.