In order to improve the scientific nature of regional air route network structure and reduce the network operation pressure made by flight flow growth, a multi-objective network optimization method based on waypoint layout was proposed. First, the constituent elements of regional air route network w...

Based on the structural and dynamic characteristics of advanced aero-engine supporting frames, the design method of high vibration isolation supporting frames is verified by theoretical analysis and simulation calculation. The structural mechanical impedance in wide frequency band is increased and h...

To achieve high loading and light weight, the speed and the support span of aero-engine rotor continue to increase, which leads to the degradation of rotor bending stiffness and the bending deformation of the rotor. There will be bending stiffness loss at interfaces when the rotor has bending deform...

Outbound passenger flow of terminal building shows the quasi-periodic variation in a short period of time and also shows complex nonlinear characteristics because of many factors such as flight schedule and weather. In order to accurately predict the short-term passenger flow of terminal building, t...

To realize a safe and effective human-robot collaboration (HRC), it is necessary for the robot to predict human motions in a timely manner, so as to assist human more actively in the cooperative work. In order to solve the problem of human motion prediction in HRC assembly scenario, a motion end poi...

To investigate the effects of plume interaction caused by multiple spacecraft engines on the flow field structure and parameters, the pressure fields of single plume and dual plumes generated by hydrogen/oxygen engines with 60 N thrust were determined using a pitot tube array in vacuum plume effect ...

Wireless sensor networks (WSNs) have attracted extensive attention due to their wide range of potential applications. Network energy conservation, energy consumption reduction and lifetime extension are problems which must be solved. In this paper, some concrete analyses on the typical clustering pr...

Based on the near-space wind field data from MERRA reanalysis data, the seasonal variation of atmospheric wind field at 20-78 km is investigated. The characteristics of wind shear over Jiuquan (39.1°N, 98.5°E) are analyzed by the method of mathematical statistics. Moreover, the effect of wind shear ...

In the process of moment-independent importance analysis, importance index are always used to quantify the inverse allocation of structural system output uncertainty to input uncertainty.An assumption is given that the variance of a given factor can be reduced by future research, which leads to the ...

To solve the problems of low modeling efficiency, unstable model quality and poor adaptability to numerical simulation in conjugated heat transfer numerical simulation of turbine blades with complex cooling structure, the turbine blade model for manufacturing and its modeling method were analyzed. C...

The modeling method of the switched reluctance motor is different from the traditional motor. By analyzing the principle of electromagnetic torque generation, the relationship between electromagnetic torque and phase inductance derivatives under different motor saturation conditions is determined. T...

The existing compositional linear models assume that samples are independent, which is often violated in practice. To solve this problem, we put forward a spatial autoregressive model for compositional data, which contains both compositional covariates and scalar predictors. Furthermore, a new estim...

Horizontal well fracturing, a popular new technology developed in oil and gas industry, is utilized to enhance the production of wells. However, crack tips determine the crack initiation and propagation direction in the process of fracture growth and have a significant effect on the fracturing resul...

Aiming at the problem of steady glide trajectory for hypersonic vehicle with disturbance motion, the adjoint method and its application were studied. Based on the mathematical definition of adjoint system, interpretations of adjoint method were achieved in a new and general way, which include perfor...

To acquire the permeability of phenolic composites under different pyrolysis temperatures, the experimental device which was used for the measurement in gas permeation process in phenolic composites was developed, and a method for measuring permeability of phenolic composites was presented. The form...

With the development of industrial informatization, industrial Internet has attracted many attentions, and massive heterogeneous data management is one of the most important issues. However, traditional relational database (RDB) limits the performance of access and retrieval of massive and heterogen...

In order to explore the mechanism of composite curing reaction of low viscosity epoxy resin, boramine-anhydride The rheological properties and curing reaction process of low-viscosity epoxy resin with boramine-anhydride composite curing system were studied, and the influence of boramine-anhydride co...

The explicit ballistic limit equation of stuffed Whipple shield may cause some deviations between the prediction results and the measured data when the projectile is subjected to hypervelocity impact damage prediction because of different filling materials and filling methods. In this regard, the ma...

In order to achieve high-performance detection and accurate positioning of aircraft targets in large-scale remote sensing images, in this paper, a kind of efficient aircraft target detection algorithm based on synthetic integration of searching and detection is presented. First, through the end-to-e...

Aimed at the currently insufficient experimental condition for the research on yielding and hardening behavior in microforming of ultrathin sheets, a micro-scaled biaxial loading test system was presented, which can achieve complex loading paths. The system is characterized with four independent dri...

A method of angle deception jamming for interferometer based on frequency diversity array (FDA) is proposed to solve the problem of direction-finding concealment of interferometer. The interferometer determines the angle of arrival by obtaining the phase difference of the signals received by each an...

To explore the basic laws of composite damage, first, based on damage mechanics, combined with Tsai-Hill criterion of strength, a damage evolution equation that can characterize the damage anisotropy of 2D braided C/SiC composites was proposed.Second, a damage simulation program considered material ...

The existence of the air domain in the multi-layer stacked battery pack makes the heat flow field of each layer module coupled together, thus affecting the heat dissipation performance of the battery module. A liquid-cooled heat transfer model for a square double-layer battery pack is established wi...

The decay of S-wave spin singlet bottomonium state to charm quark pair is studied, and the decay of S-wave spin singlet state and triplet bottomonium state to D meson pair is studied. By using the branching ratio of the decay of S-wave spin triplet bottomonium state to D meson measured by the BaBar ...

In order to realize the high-precision localization of automated guided vehicle (AGV) in complex industrial environment and overcome the influence of environment change, a vision localization method based on a global sparse map was proposed. First, a large-capacity two-dimensional coded point was de...