[en] In this paper, the changes of mechanical properties and surface properties of QF-162 polyurea coating after soaking in seawater for 120 days were studied. The changes of internal chemical bonds before and after coating corrosion were observed with Fourier Transform infrared spectroscopy (FT-IR). The results of mechanical properties study showed that after soaking in seawater for 120 days, the tensile strength of QF-162 polyurea coating decreased by 4.23%, the elongation at break decreased by 7.10%. The hardness changed slightly and Shore A hardness decreased by 3.23%. Surface performance results showed that the contact angle of QF-162 polyurea coating decreased with the increase of soaking time, and the surface energy showed a trend of increase. After soaking 120 days, the contact angle of polyurea coating decreased by 6.08%, surface energy increased by 15.83%. FT-IR microscopic results showed that there was no obvious fracture phenomenon in the internal chemical bonds of QF-162 polyurea coating and the coating had good anti-corrosion to seawater soaking. (paper)

[en] Quantum computing is a new mode that follows the laws of quantum mechanics. It performs computational tasks based on the control of quantum units. From the view of computable problems, quantum computers can only solve the problems that traditional computers can solve, but considering the efficiency of computation, due to the existence of quantum superposition, some known quantum algorithms are exponentially faster than traditional general-purpose computers. In this article, we combine quantum computing with a classical neural network to design a quantum Hopfield network. Each neuron is initialized to a specified state and evolved into a steady state. The output result is one of patterns in a training set. We also present an application of this protocol in image recognition. The simulation results show that this network works in the quantum environment and the output images are correct, therefore the feasibility of this protocol is verified. (letter)