In order to find out the influence mechanism of ultrasonic energy on the weld formation and weld defects of aluminum alloy Friction Stir Welding (FSW), the combined method of numerical simulation and experimental verification was used to design the comparison of the flow field simulation and test be...

The State of Charge (SOC) and battery capacity estimation of lithium-ion battery are the core of battery management system. Because the parameters of SOC and capacity affect each other in the estimation process, a multi-scale joint estimation method for SOC and capacity of ternary lithium-ion batter...

Using the energy equation, state equation, motion equation and mass flow equation, the basic mathematical model of the cylinder backhaul process of the new exhaust residual pressure utilization system was established. The appropriate reference value is selected to make the mathematical model dimensi...

Aimed at the diagnostic accuracy reduction, speed drop and estimation accuracy loss caused by the fixed model transition probability of Interactive Multi-Model (IMM) fault diagnosis method, this paper proposes a fault diagnosis method based on model transition probability and model probability modif...

To solve the local vibration problem of thin composite skin in civil aircraft, damping anti-vibration design method with hard coating is proposed, and multi-parameter optimization method was carried out in consideration of the effects of structural parameters of coating on the mass and natural chara...

The concentration distribution of anode propellant in discharge chamber and its gradient design is one of the most important techniques in discharging mode reliability design, and it directly influences the ionization efficiency and discharge stability of anode propellant. Aimed at the application r...

Aimed at the problem of network constraint, distributed state estimation for networked systems with packet dropouts and quantized measurements is studied. A group of Bernoulli distributed random variables is employed to describe the phenomenon of packet dropouts, and a prediction compensation mechan...

Currently, terminal Artificial Intelligence (AI) chips responsible for inference are commonly used in the market, which use trained parameters to perform fast and efficient calculations on data. However, the training dataset usually has different distribution with the real-world data, and the parame...

A reentry trajectory for a hypersonic vehicle with an accessory rocket-powered engine is optimized in terms of the ignition time of boosters and the fuel consumption, based on which a reentry mode of range-extended trajectory is proposed. The analytical solution of Sanger trajectory reveals the cond...

Facing the problems about low breakdown voltage and poor reliability of the metal interconnection, the copper diffusion barrier including the thickness of the tantalum barrier and the quality of silicon nitride barrier film was studied and optimized. The Self-Aligned Double Pattern (SADP) method can...

To solve the problem of material supply delay during the assembly process of aircraft, the assembly operation scheduling problem of aircraft mobile production line is studied. Through the dynamic analysis of material supply information, reactive scheduling decisions were divided into fixed decisions...

The information missing of key regulating valve is an important factor to restrict the modeling of complex pipeline network systems. After classifying and summarizing the modeling research of regulating valves, the conclusion that the flow characteristic curves of most regulating valves are between ...

An Aircraft Electric Taxiing System (AETS) based on the main landing gear wheel drive for a medium-range aircraft is designed, the simulation analysis is carried out as well.MATLAB/Simulink was used to model AETS. The driving motor model, the mechanical system model and the emission performance eval...

Monaural singing voice separation separates singing voice and accompaniment from a song, which can be used for applications such as melody extraction, lyrics recognition, karaoke, etc. To resolve the limited accuracy of predicted spectrogram, this paper proposes a monaural singing voice separation a...

Electrical Impedance Tomography (EIT), as a new nondestructive testing method for Carbon Fiber Reinforced Polymer (CFRP), has attracted extensive attention due to its low cost, non-radiation and visualization. Considering the serious ill-posedness of EIT inverse problem, regularization algorithm is ...

In order to solve the problem of Low Probability of Interception (LPI) performance evaluation of radar waveform domain, a Hesitant Fuzzy Set (HFS) evaluation method based on Improved Firefly Algorithm (IFA) is proposed to obtain index weight. Firstly, we introduce the HFS theory based on Technique f...

In order to analyze the influence of eccentricity on the safety characteristics of carrier-based aircraft in the process of arresting, a complete dynamic model of arresting system of a certain type of carrier-based aircraft is developed to know more about the dynamic property of aircraft in eccentri...

Advanced Receiver Autonomous Integrity Monitoring (ARAIM) technology can be used for integrity monitoring in multi-constellation combination positioning. The Multi-Hypothesis Separation Solution (MHSS) standard algorithm, recommended by the ARAIM technology subgroup, may produce lots of subsets to b...

To realize test patterns compression more efficient in integrated circuit Design for Test (DFT), and reduce test data volume and test time, the S13207, S15850, S38417 and S38584 benchmark circuits were analyzed using Embedded Deterministic Test (EDT) scan test compression scheme. By studying the fac...

Object detection is a hot topic in the field of computer vision. At present, object detection methods based on deep learning can be divided into two categories: two-stage detection and one-stage detection. The former has higher accuracy, while the latter has better speed. In order to improve the per...

In order to solve the problem of read and write performance loss in Static Random-Access Memory (SRAM) under low voltage, a novel Dual-Step Control (DSC) word-line voltage technique for low power SRAM is designed, which can simultaneously realize read and write performance and reduce the minimum ope...