Abstract Autonomous driving is gradually moving from single-vehicle intelligence to internet of vehicles, where traffic participants can share the flow information perceived by each other. When sensing technology combined with a sensor network all over road provide large-scale data, thus providing basis for building digital twin model. The enable system not only use past and present information, but also predict conditions, more effective optimization autonomous intelligent transportation,...

A novel method is proposed for moving wheeled vehicle and tracked classification using micro-Doppler features from returned radar signals within short dwell time. In this method, an adaptive analysis technique called Empirical Mode Decomposition (EMD) utilized to decompose the motion components of vehicles, a hierarchical structure decomposition results discriminate two kinds vehicles. The first stage elementarily identifies data by checking existence its unique feature further via our based...

A novel classification scheme is proposed to categorize airplane targets into three kinds, i.e., turbojet aircraft, prop and helicopter based on the jet engine modulation (JEM) characteristics of their low resolution radar echoes. From pattern viewpoint, low-dimensional feature vector extracted via a two-step extraction algorithm empirical mode decomposition method CLEAN technique. The can separate fuselage component JEM in target echo, sufficiently utilize information within or between two...

Abstract In this paper we present a generalized lattice Boltzmann based approach for sliding-mesh local reference frame. This scheme exactly conserves hydrodynamic fluxes across frame interface. The accuracy and robustness of our are demonstrated by benchmark validations.

As an important remote sensing technology, millimeter-wave radar is used for environmental in many fields due to its advantages of all-day, all-weather operation. With the increasing use radars, inter-radar interference becomes increasingly critical. Severe mutual degrades signal quality and affects performance post-processing, e.g., synthetic aperture (SAR) imaging target tracking. Aiming deal with interference, we propose mitigation method based on variational mode decomposition (VMD)....

In this study, a conservative phase-field lattice Boltzmann model is examined for simulating immiscible two-phase flows with large density and viscosity ratios. This built upon the Allen–Cahn equation, incorporating filtered collision operator high-order corrections in equilibrium distribution functions. The numerical also integrated volumetric boundary scheme immersed method to achieve various stationary moving conditions on arbitrary geometries different application scenarios. A...

Rechargeable lithium sulfur batteries are attracting great attention in recent years due to their high theoretical energy density, but they still suffer from poor cycle performance and other drawbacks. Up now, most researchers have focused on the design of state art S-containing composites or new complex electrode architectures improve electrochemical performances. However, simple low cost cathodes usually exhibit Here, we propose gelatinized starch, a natural biological macromolecule food...

The goal of the present paper is to report verification and validation studies carried out by Exa Corporation in framework turbofan engine noise prediction through hybrid Lattice-Boltzmann/Ffowcs-Williams & Hawkings approach (LB)-(FW-H). underlying generation propagation mechanisms related jet flow field fan are addressed separately considering a series elementary numerical experiments. As far as concerned, performed comparing LB solutions with literature experimental data, whereas, for...

Micro-Doppler information contained in the returned echo reflects special structure of moving vehicles and can be utilized to discriminate wheeled vehicle tracked vehicle. In this paper, generalized matched filter is employed suppress clutter a preprocessing used eliminate influence bulk velocity for Doppler spectrum firstly. Then features which depict distinction between are extracted experimental results based on presented.

High-lift devices employed onmodern aircraft are significant contributors to overall airframe noise. In this paper, a lattice Boltzmannmethodwith very large eddy simulation approach is applied computationally investigate the aerodynamic and aeroacoustic behavior of flow around generic high-lift configuration (three-element airfoil) at low Mach number. Three-dimensional time-dependent nearly incompressible simulations were conducted different angles attack capture instantaneous...

The feasibility of an extended Lattice Boltzmann Methodology (LBM) for high subsonic jets is studied. distinct advantage LBM over traditional computational fluid dynamics (CFD) methods in its ease handling problems with complex geometries. Simulations three round circular using the SMC000 nozzle were performed. conditions are, two isothermal ambient Mach numbers of, M1 D 0:5, and 0:9, one heated jet a number temperature ratio to Tj=T1 2:7, respectively. trends obtained mean centerline...

A Lattice-Boltzmann Method (LBM) based very large eddy simulation (VLES) approach is applied to simulate the flow field around a generic three-element airfoil. LBM describes fluid in terms of discrete kinetic equation on particle density distribution function (the Lattice Boltzmann equation). The effects turbulence are modeled through an effective particle-relaxation-time scale extended equations. In present study, 3D time-dependent simulations were conducted capture instantaneous and mean...

A Lattice-Boltzmann Method (LBM) is presented and applied to simulate subsonic flow over a business-jet airfoil with ice accrued on its leading edge at several angles of attack. The effects turbulence are modeled by using two transport equations based revised renormalization-group theory, realized through an effective particle-relaxation-time scale in the extended kinetic equations. wall-shear stress model used reduce nearwall resolution requirement. Flow solutions were obtained Cartesian...

Improving traffic efficiency and safety is the goal of all countries due to increasingly congested road environment worldwide. The progress intelligence has promoted development transportation industry. As first step intelligence, perception technology an important part realize intelligent transportation. Accurate efficient management systems, such as automatic control lights at urban intersections or highway emergency disposal, need support advanced environmental sensing technology. In...

Millimeter-wave radars are widely used in automotive because of their all-weather and all-day operation capability. However, as more radar sensors used, the possibility mutual interference between increases dramatically. Severe noise level, affects target detection performance, can lead to missed wrong detection. In this study, a novel solution problem is introduced. The method based on analysis synthesis spectrum sub-bands. Specifically, received signal partitioned into sub-bands, after...

Oxy-fuel combustion is one of the most promising technologies for CO2 capture. It great practical significance to gain insights into key technology compression and purification. In this study, a 50 kg/h purification test platform constructed, which used develop equipment suitable flue gas Through it verified that feasible high concentration collected from gas. Meanwhile, can operate stably. The results indicate purity liquid obtained tower more than 99%, optimal conditions operation...

Surveys on public housing in Northern China indicated that the common aim of Chinese housing, which is to provide affordable had been mostly satisfied. However, more than one fourth (29.9%) units were investigated structurally modified by their occupiers for different layouts. This situation a fixed plan could not fulfill occupiers’ various requirements spacing layout, and critical awareness shown adaptability was always ignored. Open Building well organized implemented field residential...

Accurate prediction of unsteady flow phenomena and corresponding generation tonal/broadband noise in turbomachinery applications is a challenging problem for existing numerical methods. In this study, Lattice Boltzmann method (LBM) with very large eddy simulation (VLES) approach applied to computationally investigate the aerodynamic behavior around generic Rod-Airfoil configuration, where both narrowband broadband are generated during interactions between rodairfoil structure....

Abstract During the transportation of oil and gas pipelines, there are many potential factors that can lead to pipeline leakage with serious consequences, making automatic real-time detection urgent. In response inconvenience manual detection, constant false alarm rate (CFAR) technique in radar target theory is introduced for based on acoustic signals. this paper, an algorithm improved CFAR detector proposed. The executed after pre-processing signals so as adaptively set threshold achieve...