Digital welding machine (DWM) is an advanced tool for material forming. The lifespan and health status of DWMs are closely related to the safety reliability. To address problem low accuracy in prediction DWMs, a model based on immune algorithm (IA) long short-term memory network (LSTM) with attention mechanism proposed. First, degradation characteristic indicators evaluated selected. Then, inde...

In this study, we develop a data-driven heuristic method to solve the irregular flight recovery problem. Based on operational data from China South Airlines, Beijing, China, evaluate importance of in network and influence delay its subsequent flights. Then, classify historical states into three scenarios according their reasons investigate patterns for each scenario. Inspired by results analysi...

A novel method based on spectral Green functions is presented for the simulation of driven open quantum dynamics that can be described by Lindblad master equation in Liouville density operator space. The extends Hilbert space formalism and provides simple algebraic connections between non-driven frequency domain. shows remarkable analogies to use field theory such as elementary excitation energ...

in the present research mixed convection flow through a copper-water nanofluid in a driven cavity in the presence of magnetic field is investigated numerically. the cavity is heated from top and cooled from bottom while its two vertical walls are insulated. the governing equations including continuity, n-s and energy equations are solved over a staggered grid system. the study is conducted for ...