The output torque of the motor direct-driven servo system acts directly on the load, due to chip process defects, phase inductance, detection circuit asymmetry and other factors, motor stator slotting and other factors, the first and second harmonics of phase current and tooth harmonic will directly...

Trajectory data is valuable for a variety of applications. However, it has been a long-standing challenge to share and utilize trajectory data while protecting users’ privacy. Currently, the prevailing shared trajectory privacy-preserving methods are to generate complete synthetic trajectories that ...

When a haze-degraded scene is under uneven lighting conditions, some scene details will be less visible due to hazy obscuration and light shadows. To address this issue, a hazy image restoration algorithm with double light curtain boundary constraints based on an improved atmospheric scattering mode...

In order to optimize the service process of the integrated transportation hub, the dynamic characteristics of the aggregation behavior of arriving passengers were analyzed. The transition mechanism of arriving passenger aggregation behavior between inverse gamma distribution, gamma distribution, an...

A risk assessment model with quantitative uncertainty features is suggested in order to assess air freight forwarders’ violations on air cargo transportation in an efficient manner. The Bayesian network model is constructed based on the threat possibility, security vulnerability and consequence seve...

The wavefront distortion caused by the passage of radar echoes through the atmosphere, the external flow field of the aircraft, and the radome has a crucial influence on the angle measurement error of active radar single-pulse. The impact of the refractive index gradient caused by the turbulent stru...

This study introduces the text summarizing model SPOATS, which is driven by fact triples, to solve the issue that the current abstractive text summarization models do not entirely exploit the factual information of text in decoding. The model is based on a Transformer structure, which contains a dou...

In view of the high nonlinearity of pneumatic artificial muscle and the difficulty in establishing a hysteresis model, the hysteresis characteristics of pneumatic artificial muscle were studied, and an improved Maxwell model based on slip operator was proposed. First of all, the contraction force te...

In order to solve the problem of low fault diagnosis accuracy caused by complex operating conditions and insufficient samples of rolling bearings, a fault diagnosis method based on the Markov transition field (MTF) and the stripe pooling convolutional neural network (SPCNN) for small sample rolling ...

Due to its huge parameters and computational requirements, the lip reading model is not suitable for use with edge devices or mobile terminals. In order to solve this problem, we propose a lip reading method based on decoupled homogeneous self-knowledge distillation and GhostNet-TSM. First, the TSM ...

In order to select the optimal construction scheme during the construction process for different construction objectives in the airport runway project management, various construction schemes for the airport runway construction process were analyzed, and the mathematical models were established in t...

In order to predict the output stability period of hemispherical resonator gyro (HRG) accurately, a stability period prediction method based on signal decomposition and classification modeling was proposed. The sample variation law is not obvious due to the characteristics of high reliability and l...

Strong impact loading is applied to the site during the landing process of large helicopter. The dynamic interaction between a large helicopter and the landing site is significantly dependent on the property of the landing site. The small-scale model test was carried out by modeling the impact loadi...

In order to solve the problem of aircraft path conflict in autonomous operation mode, this paper proposed a multi-aircraft path game coordination method based on distributed decision-making. Firstly, a mixed strategy-evolutionary game model was constructed based on the path planning of aircraft oper...

In recent years, video event detection has attracted increasing attention in the field of computer vision. Uncertainty estimation can alert decision-making systems or personnel when the output detection results are unreliable, reducing decision-making errors. In this paper, we proposed an end-to-end...

To measure river parameters using global navigation satellite system-reflectometry (GNSS-R), this paper studies the coherence of the GNSS signal reflected offthe river surface, and the Doppler frequency shift of the GNSS signal relative to the direct signal, explores the methods of using GNSS-R to m...

Depth information plays an important role in accurately understanding the three-dimensional scene structure and the three-dimensioual relationship between objects in images. An end-to-end self-supervised depth estimation algorithm based on uncertainty for monocular images was proposed in this paper ...

Loop heat pipe possesses the advantages of no vibration, strong heat transfer capability, high temperature controlling accuracy, and long transmission distance, which is widely applied in the field of thermal control of spacecraft platforms and load. Temperature controlling accuracy and heat transfe...

In view of the complex aerodynamic environment and noise characteristics of the scissors tail rotor under the condition of sideslip, an aeroacoustic prediction method was proposed based on computational fluid dynamics (CFD)/FW-H equation. Firstly, the flow field of the scissor tail-rotor was numeric...

Calculating hinge moments during the morphing process is a critical link in the aircraft design with a folding wing. Existing simulations mostly use the traditional lifting surface method for aerodynamic modeling, which ignores the influence of the airfoil thickness and causes a great calculation er...

As a necessary pneumatic deceleration system in the descent and landing process of the Mars probe, the demand for Mars parachutes for connection components with small mass and large loads is increasing. In view of this situation, this paper proposes a new type of flexible connection technology, whic...

Coreference resolution is an important task in the domain of natural language processing. Learning effective referential feature representation is a core problem of coreference resolution. It is ineffective to reflect the internal relationships between the information, such as named entities in text...

Regarding the issue of transient heat flux measurement on the surface of hot end components of aero-engine, for an advanced thin-film heat flux sensor with a transverse temperature difference measurement structure, differential equations of transient thermal conductivity were established by adding t...

A hierarchical control strategy is proposed for distributed-driven vehicles, taking into account the powertrain dynamical hysteresis and the coordination of motor torques and wheel steerings. This is based on the coupling characteristics of vehicle planar motion in longitudinal, lateral, and yaw dir...

Lean premixed pre-vaporized (LPP) combustion technology is widely used in centrally staged combustors of aero engines to reduce pollutant emissions. However, such combustors are prone to combustion instability. The control effect of the Helmholtz resonator on combustion oscillation in a central-stag...

An essential part of space orbit competition research is the way the satellites swarm together to generate a round-up situation for space targets. The round-up situation can effectively support the satellite swarm to implement detection and perception with all-around and real-time performance and mu...

In view of the characteristics of complex maritime combat situations, diverse combat missions, and heterogeneous combat units of unmanned aerial vehicle (UAV) clusters, a multi-objective mission assignment optimization model for maritime UAV clusters was established, and an improved discrete particl...

When the jammer executes the ground self-screening jamming and penetration action, the scintillation detection system of air-defense netted radars can guarantee the efficiency of cooperative detection of air-defense radars and improve the concealment of the system. An optimal scheduling model for sc...

The research on traffic situation awareness technology in terminal areas has made some achievements, but there is no clear method to optimize traffic situation in terminal areas with the help of this technology. In this paper, the concept of situation orientation in terminal areas was proposed, and ...

The extreme high-temperature weather that has occurred worldwide in recent years has significantly increased the probability of lithium-ion batteries operating in high-temperature environments. The battery consistency difference caused by the operating environment and system management makes the bat...

An ideal design approach is suggested for the trade-offs between performance and cost as well as between regional coverage and worldwide target coverage in the design of a constellation of remote sensing satellites. For the contradiction between construction cost and performance, a multi-objective o...

The dynamic parameters of spacecraft with rotating flexible panels are uncertain. In view of this problem, a robust attitude controller design method based on linear parameter varying (LPV) theory was proposed. Firstly, the LPV model of attitude dynamics of flexible spacecraft was established by tak...

An enhanced version of the Speech Enhancement Generative Adversarial Network (SEGAN) algorithm used in air traffic control (ATC) is suggested in an effort to raise the standard of radiotelephony communication. Aiming at the problem that the traditional SEGAN is submerged under the condition of low s...

A two-body 9-degree of freedom (DOF) dynamics model of the parafoil system was established, and the Runge-Kutta method was used for dynamic programming calculation. The numerical results of the system velocities and parafoil and load attitudes were consistent with the results in the literature, and ...

The space locking mechanism always faces the problem of a long drive chain, as well as takes large physical space. In this work, a space repeatable mechanical locking and electromagnetic unlocking mechanism has been proposed on the basis of friction self-locking theory. Various finite element analys...