A5010309557- Advanced Optimization Algorithms Research
- Aerodynamics and Acoustics in Jet Flows
- Advanced Thermodynamic Systems and Engines
- Optimization and Variational Analysis
- Fluid Dynamics and Turbulent Flows
- Refrigeration and Air Conditioning Technologies
- Iterative Methods for Nonlinear Equations
- Advanced Multi-Objective Optimization Algorithms
- Fluid Dynamics and Vibration Analysis
- Microwave Imaging and Scattering Analysis
- Gas Dynamics and Kinetic Theory
- Lattice Boltzmann Simulation Studies
- Sparse and Compressive Sensing Techniques
- Matrix Theory and Algorithms
- Numerical methods in inverse problems
- Advanced Control Systems Optimization
- Bioinformatics and Genomic Networks
- Computational Drug Discovery Methods
- Aerosol Filtration and Electrostatic Precipitation
- Acoustic Wave Phenomena Research
- Wind and Air Flow Studies
- Extracellular vesicles in disease
- Heat and Mass Transfer in Porous Media
- Statistical Distribution Estimation and Applications
- Fractional Differential Equations Solutions
Hunan University of Science and Technology
2009-2023
Huaihua University
2005-2008
Central South University
2006
Noise reduction by collars applied to rod-airfoil was studied numerically. The flow field and acoustic far-field are predicted using a large eddy simulation the Ffowcs Williams Hawking analogy. present numerical method is first validated existing experimental results for baseline case. Then, reduce interaction noise, rod with designed (denoted as Col case). main noise mechanisms of investigated in detail. show that low- medium-frequency bands rod, which tonal reduced 24.83 dB. airfoil...
In this paper, two second-order methods are proposed for reliability analysis. First, general random variables transformed to standard normal variables. Then, the limit-state function is additively decomposed into one-dimensional functions, which then expanded at mean-value point terms. The approximated becomes sum of independent following noncentral chi-square distributions or distributions. first method computes probability failure by saddle-point approximation. If a does not exist, second...
A general and simple calculation method is presented to investigate the effects of tube shape on resonant frequency performance a resonator. First, variable cross-section resonator modeled using transfer matrix. Then, amplification ratio pressure amplitude (ARPA), defined as at small end that large resonator, used evaluate its performance. The ARPA value for can be directly calculated from frequency. It shown closely related compression ratio. However, only determined by itself independent...
Variable camber is an effective method for improving the flight efficiency of large aircraft, and has attracted attention researchers. This work focused on optimization a variable airfoil. First, influences leading trailing edges airfoil aerodynamic performance were investigated using computational fluid dynamics numerical simulation. An initial database was established deep neural network. Second, iterative algorithm constructed to optimize in terms rotation angle edge, deflection position...
The acoustic streaming motion in a compressible air-filled two-dimensional cylindrical resonator driving by piston is simulated using the gas-kinetic scheme, and effects of field intensity on formation process flow structure as well pattern are investigated numerically for practical applications high-intensity devices. Therefore, five cases with different excitation amplitudes considered simulation ranging from linear to highly nonlinear regions. validation developed model verified comparing...
A gas-kinetic scheme (GKS) based on an unstructured grid is applied to simulate the evolution of fluid motions in exponential variable cross-section resonators. The effects acoustic field intensity oscillatory pressure, velocity, temperature, and flow streaming structure were investigated numerically, model was validated. results demonstrate that geometry driving strength are main factors affecting final performance system. For quasi-linear moderate non-linear cases optimum tube, periodic...
Four subgrid-scale models based on large eddy simulation (LES), such as Smagorinsky–Lilly (SL), dynamic (DSL), wall-adapting local eddy-viscosity (WALE), and kinetic-energy transport (KET) were used couple Ffowcs Williams–Hawkings equation to accurately analyze identify the characteristics position of sound sources rod–airfoil interaction. The results four compared with experimental data. It was found that DSL model optimal for study interaction noise considering calculation accuracy....
The two-dimensional nonlinear acoustic oscillations in the resonator of four different driving amplitudes are simulated by a gas-kinetic scheme.The shock resonator, effects amplitude on field and flow distribution harmonics investigated based simulaton results.Moreover, this work discusses reasons for such as annular effect velocity reverse.It is pointed out that waveforms acoustics variables increasingly distort with driving-amplitude increasing.And it found under large-amplitude quite from...
Abstract Background Discovering potential predictive risks in the super precarcinomatous phase of hepatocellular carcinoma (HCC) without any clinical manifestations is impossible under normal paradigm but critical to control this complex disease. Methods In study, we utilized a proposed sequential allosteric modules ( AMs )-based approach and quantitatively calculated topological structural variations these AM s. Results We found total 13 oncogenic OAMs ) among chronic hepatitis B (CHB),...
A derivative-free iterative algorithm is presented for solving nonlinear equations. Error analysis shows that the super-cubic and of order 3.3028 approximately.
Objective: To demonstrate a novel spatial search algorithm for computing potentially transcribed gene combinations using Behcet's disease (BD) as an example. Methods: After quality control of each sequencing sample, differentially expressed genes were screened, followed by bioinformatics analysis. The data set was analyzed Weighted co-expression network analysis (WGCNA) to obtain the modules most related BD. On this basis, new K-means clustering structure designed improve accuracy...
A modified asymptotical regularization gradient method is presented for nonlinear ill-posed operator equations. Employing a priori and posteriori rules respectively, we obtain some convergence results under source condition. The stable with respect to perturbations of the If condition holds, optimal order rule. can be taken as generalization existing method. From method, many other convergent iterative methods constructed. Our numerical show that algorithm valid.
A periodic square-wave structure was designed on the cylinder surface to control interaction noise of tandem double cylinders. Experiments were carried out measure and flow field with particle image velocimetry technique in a 0.55 × 0.4 m acoustic wind tunnel. The influences different parameters reduction mechanism investigated. incoming velocity is range 20–80 m/s. experimental results show that cylindrical can significantly reduce cylinders, sound pressure level mainly middle-...