For the distributed state fusion estimation problem of networked navigation system (NNS) with random communication delay and non-fixed packet loss rate under three network constraints, namely, node measurement gain attenuation, node energy limitation and system model uncertainty, the degree of node ...

As air traffic flow grows year by year, control pressure keeps rising and to find a resolution to flight conflict is increasingly difficult. This paper takes aircrafts as the nodes and establishes a flight conflict network based on the velocity obstacle relationship between aircrafts. Then, the conc...

This study proposes a deep learning model for mural restoration based on generative adversarial networks with multi-scale feature and attention fusions, addressing insufficient feature extraction and detail loss of the existing deep learning image inpainting algorithms during reconstruction. Firstly...

Aiming at the highly ill-posed problem of the application of electrical impedance tomography (EIT) to the damage detection of carbon fiber reinforced polymer (CFRP), a joint ${L_1}$ and ${L_2}$ norm sparse regularization functional model was proposed, and a new constraint is constructed to optimize ...

In order to study the influence of the rim seal between the turbine wheelspace on the downstream rotor passage, numerical simulations were performed on the flow field distribution and aerodynamic loss in the turbine rotor passage when unsealed cavity, unsealed air flow and different purge flow rates...

In the process of beyond-visual-range (BVR) air combat, due to the limitation of detection equipment performance and enemy interference, the target information is easy to get lost, which makes it difficult to identify the enemy’s cooperative air combat tactics in real time. A method of cooperative t...

The infrared (IR) small target detection algorithm with high detection rate, low false alarm rate and good real-time performance has important application value in the field of IR remote sensing. Traditional IR small targets detection algorithms cannot guarantee the detection performance due to the ...

System-theoretic accident model and processes (STAMP), which considers system safety as an emergent property of systems, provides a more accurate accident/loss causality model for modern complex systems. System-theoretic process analysis (STPA), a new approach to risk analysis based on STAMP, is get...

The application of Barker code pulse compression technique in a shear horizontal (SH) guided wave electromagnetic acoustic transducer (EMAT) has significant value in engineering application as it enhances the signal-to-noise ratio (SNR) and spatial resolution of the corrosion echo detected in in-ser...

Decentralized fusion estimation is investigated for a networked uncertain stochastic system with stochastic delays and dropouts. The uncertainty of the model is described by non-Gaussian non-white noise perturbations considered in the system matrix. Several finite memory buffers with different lengt...

To deal with the problem of trajectory optimization for the air-to-surface missile in full airspace, a combinational optimization algorithm based on a multi-island genetic algorithm (MIGA) and sequential quadratic programming (SQP) was proposed. The advantages of being insensitive to initial values ...

Benefiting from the curved fibre paths, variable-angle-tow (VAT) fibre composites feature a larger design space than traditional straight-fibre reinforced plastics. VAT fiber composite has better in-plane stability than the straight fiber, hence it has a higher buckling resistance potential at the s...

To enable the high-resolution detection of low-speed, low-density and low-temperature pickup ions (PUIs) in the outer heliosphere, a new high-resolution detector is designed based on the toroidal top-hat electrostatic analyzer, retarding potential analyzer and linear-electric-field time-of-flight an...

During the service period, penetration damage may occur in the titanium honeycomb sandwich cover structure which will affect the in-plane compression properties of the sandwich cover structure. The influence of penetration damage on the in-plane compression properties of titanium honeycomb sandwich ...

The influences of the admittance phase and amplitude of acoustic metasurfaces on the broadband unstable modes in a high-speed flat plate boundary layer are analyzed using linear stability theory (LST). It is demonstrated that when the admittance phase goes to 0.5 π, the first mode is suppressed whil...

In recent years, federated learning has received extensive attention in many fields, but this technology inevitably causes data transmission security problems. However, authentication and key agreement are important to ensure secure transmission and reliable communication between communicating entit...

As actual observation noises vary in different environments, the fixed noise variance matrix may degrade the performance of the Kalman filter (KF)-based fault detection method. To deal with this issue, we proposed an adaptive noise variance-based fault detection algorithm. Its fault detection and id...

When a landing rover is entering the Martian atmosphere, its trim wing will be deployed from the retracted state and locked following instructions when arriving the target position. Then, the attack angle of the entry capsule will be trimmed to an appropriate range. Hence, the dynamic performance of...

Accurate rolling bearing remaining useful life (RUL) prediction is extremely important to assure the machine’s safety and decrease damage repair. To improve the accuracy of rolling bearing RUL prediction, proposed a bearing RUL prediction method based on the Transformer model, made full use of its s...

Accurate detection and attack of warship’s vital parts can effectively improve the damage efficiency of anti-ship missile. Aiming at the problems of low detection accuracy on vital parts and insufficient accuracy of guidance error, this paper proposes an algorithm of warship’s vital parts detection,...

Aiming at the shortcomings of high peak-to-average power ratio (PAPR) in the filter bank multi-carrier system with offset quadrature amplitude modulation (FBMA/OQAM) system, which will cause distortion and affect the channel estimation performance, an interference cancellation method based on phase ...

To improve the performance of tropospheric scattering spectrum sensing, a spectral sensing scheme for tropospheric scattering multipath fading channels is presented. To solve the problem of poor perception of the tropospheric scattering spectrum, the time-domain diffusion characteristics of the trop...

Modeling under coupling stress is challenge in the field of fault prediction and health management. Based on the the ground degradation test of the oxygen concentrator, this research proposes a modeling framework with partial differential equations combining mechanism model and data driven model, wh...

Flying wing aircraft will become the mainstream of future aircraft due to its high aerodynamic efficiency; however, its performance improvement is limited by structural weight. Structural optimization is an important technique to reduce structural weight. A topology optimization model is thus establ...

Low-dose CT (LDCT) contains abundant tissue structure, pathological information and noise artifacts with extremely irregular distribution.These two different types of information have comparable amplitude distributions. Therefore, the LDCT denoising task is prone to some problems, such as insufficie...