Abstract: Alkaline polymer electrolytes membrane fuel cells (APEMFC) have been investigated as an alternative to proton-exchange membrane fuel cells (PEMFC) because of their compatibility with nonprecious-metal catalyst, favorability toward fuel oxidation, together with the lower cost, where the charge carrie...
Abstract: Superalloy honeycomb panels with the advantages of light weight, high strength and excellent heat-shielding properties have been widely used in the field of aeronautics and astronautics. Deformation measurement of superalloy honeycomb panels due to transient thermal loading is essential for the desi...
Abstract: The mechanical behavior of sands and other granular materials subjected to rotation of principal stress axes is significantly dependent on the micro fabric properties and their evolution. The discrete element simulation for sands under cyclic rotation of principal stress axes was validated by compar...
Abstract: Vascular tissue and bone tissue cannot be clearly separated based solely on grayscale information in images of computed tomography angiography (CTA). The algorithm based on the growth of three-dimensional (3D) region improved bone tissue outside the bone contour extraction and the extraction algorit...
Abstract: The pedal characteristic from experiments for target, a pedal simulator with elastic components and hydraulic unit as the basic simulation unit was designed, which based on the analysis on the pedal characteristics in traditional hydraulic braking system. The "breaking feeling" evaluation index was ...
Abstract: For geosynchronous (GEO) orbit space object's detection and recognition is mainly dependent on analysis, identification and judgment of reflected sunlight photometric curve. Based on analysis of visible light reflection characteristics calculation model of space target surface diffuse reflection pro...
Abstract: When L-shaped component is detected by ultrasonic phased array inspection technique based on total focusing method, wave propagation path in the specimen became more complex to increase the computational difficulty of propagation time due to the complicated geometries of component. To solve this pro...
Abstract: Firstly, the K-π interaction in P-wave in a finite volume using the chiral unitary approach was studied, to find an efficient strategy to obtain K-π phase shifts and thus the K* meson properties from energy levels could be obtained in lattice calculations. This method has been applied to provide K-π...
Abstract: To predict and evaluate the effects of multidimensional visual coding on pilot's information identification, a new comprehensive evaluation mathematical model of multidimensional visual coding on display interface, which adopted meta-analyses and integrated performance values (IPVs) for the unitary ...
Abstract: To solve the problem of the pilot motion intent's identification and tracking during the swing motion of lower extremity exoskeleton, a control algorithm based on admittance method was proposed at first. This control method used the admittance characteristics between the force and velocity of moving...
Abstract: An attitude decoupling algorithm based on active disturbance rejection control (ADRC) was designed for underactuated quadrotor aircraft. The algorithm can overcome some shortcomings of traditional control method for underactuated quadrotor, such as strong coupling between system states, weak anti-in...
Abstract: The repair capability of carrier-based aircraft is constrained by finite repair channels. To make Palm's theorem and Metric theory applicable to the optimal allocation of carrier-base aircraft repairable spares, the modified accommodative models of repair and supply channels under conditions of dedi...
Abstract: In order to obtain periodic material microstructure under macroscopic thermal conduction condition, the optimal topological model of periodic structure was built by solid isotropic material with penalization (SIMP) method. The volume fraction was referred as constraint and minimized thermal complian...
Abstract: Firstly, semi-conductive granules in different diameters from nanometer to micron were used to modify polyimide resin that strengthened by glass fabric. Four kinds of polyimide resin with non-alkalis glass fibers were produced, including the original, micro-filler, nano-filler, and micro/nano-filler...
Abstract: Based on a 350-passenger blended wing body (BWB) integrated aircraft with a distributed propulsion system, effects of crucial design variables of distributed propulsion on aerodynamic performances of the aircraft are studied by a computational fluid dynamics method. It is shown that the effect of th...
Abstract: Firstly, compressional experiments were conducted on open-hole composite laminates. The progressive damage during the loading process and the final damage mode of the specimen were detected with a digital microscope, scanning electron miroscope and an X-scan equipment. Damage initiation and delamina...
Abstract: To investigate the effect of angle of attack and jet position on the lateral control force in the cross jet flow, the paper firstly simulated the supersonic cross jet flow by the numerical methods. The calculated longitudinal wall pressure distribution agreed well with the experimental results. Jet ...
Abstract: To solve the accumulation and reusing problems of fault case knowledge that are described as unstructured and unnormalized information in the current maintenance support activities of aircraft, research on the knowledge representation and information extraction method of aircraft fault case was carr...
Abstract: Most existing remote video communication systems are confined to how to accurately deliver adequate information in real time, but lose sight of communicators' interaction demands. Meanwhile, traditional 2D-based video communications cannot make full use of people's 3D information, which shows great ...
Abstract: Aiming at the phenomenon of complicated process and imperfect algorithm in the evaluation of radar anti-stealth performance, a new method for the evaluation based on improved evidence theory was presented. Firstly, to overcome the shortcomings of strong subjectivity and weak correlation, the credibi...
Abstract: To reach the requirements that the space environment simulation coil's magnetic induction intensity can continuously adjust from 0 to 20 Gs, and the magnetic field stability can be better than 1%, main circuit topology structure using a voltage source in series with a current source, combined with t...
Abstract: In order to balance the aerodynamic performance and buoyancy-lifting characteristics of airship, to make full use of their advantages and to strengthen the controllability, a hybrid airship configuration which has combined envelopes that are based on high lift NACA airfoil was proposed. With computa...
Abstract: All swirl cups have the same primary inclined multi hole and secondary radial straight blade and a simplex pressure atomizer. The effects of primary swirl number of airblast atomizer on small combustion ignition performance were examined. The ignition experiments for swirl cups with three different ...
Abstract: Large intra-class variations of action features lead to low classification accuracy of action recognition, on the other hand, current algorithms exist drawbacks in computational complexity and extension of recognizable action classes. A method based on locality-constrained linear coding (LLC) for ac...
Abstract: For a two-dimensional airfoil with leading-edge and trailing-edge control surfaces, the nonlinear aeroelastic equations under the supposition of quasi-steady aerodynamic forces were established and were described in state space form. The control variables of the leading and trailing edges were coupl...
Abstract: Gyroscope is the key component in an inertial navigation system (INS). It depends on the precision of the INS. In order to improve the gyro's operational accuracy and compensate the random error caused by the nonlinear and weak-stability characteristic of gyro's random drift, the nonlinear random dr...
Abstract: Taking the discontinuity and random character of granular system into account, a kinematic model of particles was established by three-dimensional discrete element method in order to investigate the relationship between angle of repose and gravity. Accumulation process of granular pile was simulated...
Abstract: There has been a wide range of image retargeting (IR) approaches, in order to solve the problem of adapting images to different display resolutions. A fast image retargeting method was proposed, which was based on image columns. Firstly, the method would calculate a saliency map of the original imag...
Founded: 1956 (
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Sponsor: Ministry of Industry and Information Technology of the People's Republic of China
Sponsored by: Beijing University of Aeronautics and Astronautics