To ensure flight safety, a metal current return network is added for composite material aircraft to meet the grounding requirements of the electrical system on board. For the calculation problem of the impedance of the composite material and the metal current return network, a Partial Element Equiva...

In order to overcome the shortcomings of Artificial Immune Algorithm (AIA) used in the function optimization process, such as huge calculation amount, low convergence accuracy and slow convergence speed, multiple adaptive immune operators are introduced, and an Improved Adaptive Artificial Immune Al...

In order to ensure the safety of aircraft operations in the sector, improve the resilience of the sector network under external disturbance, and thereby effectively reduce flight delays and airspace congestion, by using complex network theory, an airspace sector network model of China is established...

Aimed at the current research on the safety of lithium batteries, focusing on the experimental measurement of characteristic parameters and analysis of reaction mechanisms, this paper proposes the thermal runaway risk index of lithium batteries based on risk assessment theory and applies it to the q...

In order to resolve the problems of low sensitivity, high coupling degree and prominent nonlinearity during the load measurement of telescopic landing gear by strain method, the decoupling design methods of structure partition and strain bridge are proposed. Trough optimization design the effective ...

With limited communication range and real-time information transmission via multihop communications, a novel multi-UAV cooperative surveillance method based on role switch strategy is proposed for searching unknown region and monitoring some hotspots. Firstly, considering history detection informati...

The crater-based navigation technology has been become a novel and precise autonomous navigation method in space exploration, and how to extract the crater regions from the crater navigation image is the essential condition of the crater-based navigation method. Accordingly, in this paper, we propos...

For cross layout grid fin-missile body configuration, the vertical grid fins will be exposed to the interference regions of head separated vortices, and thus the horizontal grid fins will be immersed in the missile body upward flow while a certain body's angle of attack exists. Therefore, there will...

High Current Spike (HCS) of nonvolatile Flash chip has been tested by pico-second pulsed laser single event effect experimental facility. Accurate positioning of pulsed laser confirmed that sensitive area triggering HCS was charge pump of the chip. Different laser energies and specific locations in ...

In order to ensure the smooth transition of the wide-area differential service of the Beidou system, the Beidou-3 System (BDS-3) uses D2 navigation message on GEO satellite to broadcast the equivalent clock correction and ionospheric grid information on B1I/B3I frequency. This paper analyzes the cha...

Ethynyl-terminated oligomers (BETI) with different degrees of polymerization were synthesized using 2, 3, 3', 4'-biphenyltetracarboxylic dianhydride and 2, 2'-bis(trifluoromethyl) benzidine as the monomers and ethynylphthalic anhydride as the end-capper; modified cyanate ester resins were then formu...

During the flight of near space hypersonic vehicles, the external disturbances may result in high angle of attack conditions. And the off-design conditions may lead to a large deflection angle of the all-movable tail, which brings aeroelastic problem. Aimed at solving the aeroelastic problems, aeroe...

In this paper, a turbulent jet with Reynolds number 33 000 forced by a pair of pulsed jets working in antisymmetric mode is investigated using laser-induced fluorescence technique. The evolution of large-scale vortex structures in the shear layer is captured and the effect of forcing frequency and a...

Software defined Time-Triggered Ethernet (TTE) optimizes message scheduling in avionics systems, and its dynamic online scheduling algorithm must ensure the transmission determinacy of all the messages in any case. When time interval of Time-Triggered (TT) message is less than the frame length, the ...

The plasma excited by Surface Dielectric Barrier Discharge (SDBD) owns both significant aerodynamic effect and chemical activation effect. In order to analyze the combustion-assisted effect of surface dielectric barrier discharge on shear-coaxial air/methane diffusion flame, the reverse excitation o...

This paper uses numerical methods to study the magnitude of the maximum impact load on the fuselage and its physical cause during the compulsory landing of the wave. In the numerical calculation, the finite volume method and Volume of Fluid (VOF) method are used to capture the free surface. The Six-...

For a dynamic test model designed in China in recent years with a typical advanced fighter layout, Wire-Driven Parallel Robot with 8 Wires (WDPR-8) support and a traditional machetes tail support were used in a FL-5 wind tunnel for a comparative blow test. According to the wind tunnel test environme...

In order to solve the problem of ambiguity of phase difference information measured by one-dimensional single-baseline interferometer in an airborne single-station passive positioning system, the positioning method that measures only the phase difference change rate is improved, and the fuzzy phase ...

Escort strategy has always been one of the important studies of the major military powers and the denial environment with characteristics of strong electromagnetic interference and strong confrontation game puts forward higher requirements for escort strategy. This paper presents an escort strategy ...

Compared with ground networks, UAV networks have the characteristics of fast moving nodes, frequent topology changes, and unreliable communication links. Traditional intrusion detection methods are difficult to apply. Aimed at the spatio-temporal dynamic characteristics of UAV networks, an intrusion...

In recent years, it has become a hot spot to deeply analyze the personalized data of e-commerce users and provide recommendation services.The basis of recommendation service is to mine the potential interest of users and predict user's interest of products. Therefore, this paper takes this as the ba...