With the widespread use of hand gesture recognition technique, capabilities of robust measurement and classification in non-contact and all-day conditions are much desired in its applications, such as human-computer interaction, life entertainment and medical service.According to this requirement, t...

Aimed at the problem that the reliability of the active suppression interference classification recognition result is low when the jamming-signal-ratio is unknown, a detection and classification algorithm of suppression interference based on characteristic differences of FRFT domain was proposed.Fir...

Based on three-dimensional continuum topology optimization theory, aimed at maximizing compliance ratio, solid isotropic material with penalization model was used to establish the topology optimization model of a single-axis flexure hinge. With the help of OptiStruct, this paper designed a kind of s...

Among many photoanode materials, the nanostructured material α-Fe₂O₃ is considered as one of the most promising materials due to its remarkable light absorption, good chemical stability and abundant reserves. Co and P doped α-Fe₂O₃ nanomaterials with excellent water splitting properties were prepare...

Micro-thrust satellite formation can better complete the high-precision aerospace satellite formation tasks. Close-range cooperative work is the basic feature of satellite formation flight, and the specific geometric configuration and relative movement between the satellites is the basic condition o...

For the fact that the fractional moment based principle of maximum entropy for structural reliability analysis has some advantages in computational efficiency and precision, in this paper, three computational methods for accurately estimating the fractional moments of constraint condition output res...

Fan wing aircraft is a kind of new-concept new-principle aircraft, and especially its wing has unique aerodynamic principle.Fan wing can simultaneously generate lift and thrust.In order to further improve fan wing's aerodynamic characteristics, two fan wings were installed along the longitudinal bod...

Smeared spectrum (SMSP) jamming is a kind of correlative blanket jamming to linear frequency modulation (LFM) signals. According to the periodicity of SMSP jamming sub-pulse, a jamming suppression method based on jamming reconstruction and kurtosis maximum is proposed. Firstly, the period of sub-pul...

Linear layer of lightweight hash functions is ordinarily too simple to resist statistical saturation attack. A novel lightweight hash function is proposed, which is based on the sponge structure and inspired by affine transformation S-box. The affine transformation S-box inherit the excellent crypto...

The hardware in the loop simulation of geomagnetic navigation is the key link for the geomagnetic navigation from theory to engineering, and the technology of geomagnetic field environment simulation is the bridge between the computer simulation and the hardware in the loop simulation. Aimed at the ...

The optimal landing trajectory and control process of helicopter autorotation after tail-rotor total failure is studied using optimal control method. A six-degree-of-freedom rigid-body flight dynamic model was developed with equations describing the tail-rotor total failure and the available shaft p...

Ring laser gyro inertial measurement unit (IMU) encounters the problem of relatively large stochastic noise because of the strenuous dithering motion. The conventional calibration method eliminates the impact on the stochastic noise by extending the measurement time, which undoubtedly reduces the ca...

Based on the theory of complex networks, this paper analyzes the functional self-healing mechanism of aviation network from the energy perspective, and studies the self-healing characteristics under different growth mechanisms. Firstly, network structure was divided into self-healing structure and c...

To obtain the macroscopic stiffness property of the dimpled sheet and its relationship with surface morphology structure parameters, the unit cell finite element method finite element method was used to analyze the equivalent stiffness property of the dimpled sheet. Firstly, based on the periodic bo...

The method of global navigation satellite system-interferometric reflection (GNSS-IR) was developed to realize the altimetry. The model of global navigation satellite system-multipath reflection (GNSS-MR) was analyzed in depth. A single antenna height measurement model was proposed to obtain the sig...

In this paper, an improved synthetic E-Bayesian method is proposed to estimate the reliability parameters of aviation electronic equipment for the zero-failure situation of type-Ⅰ censoring test with replacement. This method employs the failure factor and self-adaptive coefficient, which are combine...

Fatigue fracture of metal materials is a common failure mode in engineering structures. Damage mechanics regards crack initiation as a progressive damage process, describing and conducting life estimates through the damage evolution equation. However, the parameters in the damage evolution equation ...

The paper conducted a linear stability analysis on the Newtonian liquid films flowing down a porous wall, especially concerning about the case of moderate Reynolds number. It was considered that the flow at the porous wall satisfied the Beavers-Joseph slip boundary condition. And the momentum integr...

The next generation of technology of low emission of stirred swirl (TeLESSⅡ)low-emission combustor developed by Beihang University adopted a central staged arrangement. The center of the dome was classic swirl cup pilot structure which could provide a stable ignition source for the combustor. The ma...

In order to solve infinitesimal deformation contact problem of a linear anisotropic elastic body, the elastic body is divided into several parts, according to the contact condition between the rigid body and the indenter. Based on Eshelby-Stroh formalism, the displacement function and stress functio...

Aimed at the application of near space aerostats' load cabins, numerical simulation of natural convection, surface thermal radiation and heat conduction in a cubical enclosure cavity with a heat source in complex thermal boundary conditions was carried out. A model of near-space thermal environment ...

In order to analyze the problems of vibration increasing and interface wear of aero engine during work, the dynamic models of rotor-bearing system with three disks were established on the basis of the structural feature analysis. A parametric description has been made to analyze the coaxial and para...

An integration algorithm of nonlinear polynomial model structure identification and parameter identification was proposed for the linear parametric polynomial assembled model, which had wider significance in the field of nonlinear systems. The algorithm combined optimal-selecting process based on co...

The problem of identification in non-stationary time-varying system is investigated based on a time-varying parametric modelling algorithm, and is applied to time-frequency feature extraction analysis of electroencephalography (EEG) signals. The multi-wavelet basis function which has proved efficien...

Laser displacement sensor is usually used in normal detection of aircraft panel. To solve the problem of the decrease of normal detection accuracy caused by machining and installing errors of laser displacement sensor, a calibration method based on math model and least square method was proposed and...

According to "low load, low stiffness; high load, high stiffness", nonlinear stiffness compliant actuators (NSCA) are developed to optimize the workspace of variable stiffness actuators (VSA). Besides, NSCAs are able to perform high force resolution under small interactive force and fast response un...

In order to investigate the influence of loading conditions and road conditions on safe driving speed threshold on curve section of road, oversize vehicle dynamics model, road scene model and driver control model were established by using TruckSim software. Simulation tests were conducted in terms o...