A coupled scattered field fast prediction method based on the radiation source pattern and polarization scattering matrix is proposed for the complex electromagnetic environment in which the target and interfering radiation sources exist simultaneously and affect the scattered field of the target. T...

This article gives a review of the evolution of computer use-mode over the time since the invention of modern computers and presents the challenges and tasks in building the national computing infrastructure. The first section of this article provides a brief overview of how computer use-mode has ev...

Without knowing the relationship between the chemical composition and properties of the material, the development of new materials with desired properties based on conventional trial-and-error methods is cost inefficient and sometimes ends fruitlessly. With the development of artificial intelligence...

In the context of the globalization of air traffic control, the ICAO has proposed a new generation of surveillance technology called the automatic dependent broadcast surveillance (ADS-B) system. Compared with land-based systems, the space-based ADS-B system can achieve global airspace coverage, whi...

Accurate prediction of passenger flow of airport express rail is the basis for realizing intelligent, refined and efficient control of airport rail transit system. And it is of great significance to improve airport service levels and operational efficiency. The correct prediction of airport express ...

An Aircraft hydraulic pump provides high-pressure energy for aircraft manipulation, landing gear retraction and braking. Maintaining its reliability and safety is critical. In this paper, we construct a mixed lubrication wear degradation model based on the micro topography for rotor-valve plate fric...

This paper proposes a multi-unmanned aerial vehicle (UAV) cooperative target defense method based on exponentially averaged momentum pigeon-inspired optimization (EM-PIO). Firstly, the multi-UAV cooperative target protection system in three-dimensional space is modeled. The surface constraint equati...

Fuel injection technology is one of the key technologies of aviation piston engines. Its structure and characteristics directly affect the integral performance of aircraft piston engines. With the requirements of general aviation for better engine performance, the development of fuel injection techn...

The supercritical carbon dioxide (SCO₂) closed Brayton cycle has received considerable attention in the field of energy and power due to its advantages of high thermal efficiency and compactness, economy, and environment friendliness. This study reviews research on the SCO₂ closed Brayton cycle in t...

In recent years, the water striking aircraft which realizes high-speed maneuvering flight near the water surface by using skipping motion has become one of the hot issues in research, and the solution of high-speed oblique water impact load of three-dimensional structure is the key step of skipping ...

Time integration methods are a powerful tool for solving transient responses, which have been widely used to solve dynamic problems in aerospace, civil engineering, machinery manufacturing, and other fields. This paper reviews the advances in time integration methods in the past decades. Firstly, so...

Rotational components undergo complex loads which can easily initiate cracks, resulting in fatigue and fracture failures. For thermal-loaded rotational components with cracks, the finite element method (FEM) was applied to the global structure without cracks, thus exerting the advantage of FEM in nu...

Due to the complexity of the scene and the diversity of objects, the objects in the scene of outdoor surveillance video are difficult to detect, which involves such problems like the object is blocked, or the size of object changes. Therefore, the object detection task is still challenging. To impro...

The automated fiber placement (AFP) process has become a promising solution to the fabrication of composite structures, due to its efficiency and stability. However, the instability of the lay-up process parameters and the performance of the equipment can easily cause such defects as gaps, overlaps,...

To achieve peak carbon and carbon neutral goals, the development of electric cars has become strategically important. It is necessary to have precise battery management technology because the lifespan and safety of power batteries change dynamically as they are used. This leads to rapid capacity deg...

To evaluate reliability of new products, function-oriented design should comprehensively consider the influence of new structure and technology, multiple design variables, and complex working environments, and reasonably quantify uncertainty effects. This will ensure high reliability from the origin...

In the combustion process of liquid fuels, jet instabilities and atomization are the starting points, which can have significant effects on following processes such as evaporation and combustion. There remain gaps in our under standing of the turbulent jet atomization mechanism despite the extensive...

To accurately detect the residual thickness of pipeline, a non-contact pipeline thickness detection system based on the electromagnetic ultrasonic shear wave was designed. The system adopts a self-developed electromagnetic ultrasonic high-power excitation source and a transducer to generate shear wa...

The electrowetting liquid lens is increasingly favored by researchers due to its tunable focal length, fast response, convenient operation, and low power consumption. It can solve some technical problems such as mechanical jitter and discrete zoom in microscopic imaging systems, thus promoting the i...

Drag reduction surfaces have attracted more and more attention due to their great potentiality and wide applications in marine ships, pipeline transportation, aircraft, and national defense and military. Interestingly, animals and plants in nature have evolved many unique shapes or surface structure...

High-temperature proton exchange membrane fuel cells (HT-PEMFC) has fast electrode reaction kinetics, strong resistance to fuel/air impurity poisoning, a wide range of fuel sources (pure hydrogen, methanol-reforming gas, formic acid, etc.), and simple water/thermal management systems due to their hi...

It is difficult for the traditional quadrotor control method with poor control effect in aggressive flight and low control accuracy to track trajectory with high speed and high acceleration. To solve this problem, a control method is proposed based on incremental nonlinear dynamic inversion(INDI) an...

To explore the effect of helmet on neck injury of pilots in-flight, numerical simulations were carried out on four different helmets during sharp turn and stable hover condition based on the established head-neck multi-body dynamic model. Combining the muscle force, intervertebral force and moment, ...

With characteristics, such as cross interconnection and multiple connections, cyber-physical systems is susceptible to network attack. Through relevant research on its network architecture and on the characteristics of its network application, a model for multidimensional attack damage assessment is...

Cooperative guidance issue with attack time consensus is an important branch of cooperative guidance issues. The main research results and classification methods of cooperative guidance with attack time consensus for multiple aerial vehicles are summarized. Firstly, the tactical significance of coop...