A5031105816- Topology Optimization in Engineering
- Composite Structure Analysis and Optimization
- Ionosphere and magnetosphere dynamics
- Earthquake Detection and Analysis
- GNSS positioning and interference
- Structural Analysis and Optimization
- Geophysical and Geoelectrical Methods
- Geophysics and Gravity Measurements
- Advanced Multi-Objective Optimization Algorithms
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Structural Load-Bearing Analysis
- Seismology and Earthquake Studies
- Advanced Antenna and Metasurface Technologies
- Geomechanics and Mining Engineering
- Structural Engineering and Vibration Analysis
- Electromagnetic Scattering and Analysis
- Power Line Communications and Noise
- Advanced Materials and Mechanics
- Geophysical Methods and Applications
- Antenna Design and Analysis
- Soil Moisture and Remote Sensing
- Geodetic Measurements and Engineering Structures
- Solidification and crystal growth phenomena
- Aeroelasticity and Vibration Control
- Advanced SAR Imaging Techniques
Qilu Hospital of Shandong University
2025
Fudan University
2018-2024
Beijing University of Technology
2006-2019
Nanjing University of Aeronautics and Astronautics
2015
Beijing Polytechnic
1999-2002
Dalian University of Technology
1984-1997
<title>Abstract</title> Objective Currently, bladder reconstruction using gastrointestinal segments is considered as the gold standard for repair or augmentation. However, postoperative complications including bowel dysfunction, metabolic abnormalities, chronic urinary tract infection and stone formation are common. This study aims to evaluate utility of compound graft patch by seeding mesothelial cells onto autogenous granulation tissue. Methods 22 Fr silastic tubes were implanted...
3-D computerized ionospheric tomography (CIT) is an ill-posed problem due to the insufficient amount of observations, it remains challenging for practical applications. In this article, we proposed method that combined data-driven methods with compressed sensing (CS) deal problem. First, slant total electron content (STEC) data were extracted by undifferenced and uncombined precise point positioning (UCPPP) known fixed station coordinates. Second, adopted construct projection matrix from...
On the basis of previous works, here we propose an approach to optimal design engineering structures for member sizing and shape optimization. This is based on transformation a non-linear programming problem (NLP) into sequence quadratic problems (SQP). Compared with commonly used sequential linear (SLP), SQP more suited highly structural Different modes may be used. Four types ofSQP presented in this paper have been demonstrated stable rapid their convergence according our experiences....
A multiple regression and machine learning approach is proposed to solve plasma parameter inversion in complex systems. For an electromagnetic (EM) wave interaction system, it common retrieve parameters based on the reflected or scattered EM field, whereas becomes particularly challenging for anisotropic inhomogeneous medium. Artificial neural network (ANN) applied density fluctuation The method computationally efficient robust solely time series of data collected at a fixed number spatial...
Frequency Selective Surface (FSS) stealth radome is the new development of radome, however "being in-band" limit still has not been well solved. Active FSS (AFSS) with reconfigurable performance can change its characteristic via external control and realize "invisible-all-band" by "time-domain-stealth" feature. In this paper, an AFSS working at X-band excellent filter designed, which keeps band-pass OFF state while shifts to shielding ON state. According both transparent opaque states AFSS,...
The need for accurate modeling of the ionosphere plays an important role in global navigation satellite system (GNSS) positioning. traditional multi-layer VTEC model without prior has been used ionospheric delay error. However, it is assumed that electron density compressed into multiple thin layers at fixed heights lack capturing physics. In this paper, data enhancement method by virtual observations proposed to build constrained capture physical features from empirical models. extraction...
Ionospheric structure is important for estimating ionospheric delay user stations in Global Navigation Satellite System (GNSS). However, most existing parameter estimation methods suffer from challenges due to data inaccuracy and unavailability of limited sparse scattered at ground reference stations. The high variability active low latitude or disturbed ionosphere leads GNSS signal scintillation. It critical capture random estimate using disperse receivers improve accuracy. This paper...
We establish topology optimization model in terms of Independent Continuum Map method (ICM), so as to avoid the difficulties caused by multiple objective functions compliance, owing referring weight function. Using distorted-strain-energy criterion, we transform stress constraints on all elements into structure strain-energy global sense. Then, problem topological optimum continuum subjected is formulated and solved. The process conducted through three basic steps which include computation...
In this paper, a model of topology optimization for the lightest plate structures with linear buckling constraints is constructed based on Independent, Continuous and Mapping (ICM) method. Exponential function adopted as filtering element weight, stiffness matrix geometric matrix. Based Taylor expansion function, were approximately expressed explicit functions. The was translated into dual programming solved by sequence second-order programming. Two numerical examples show that method...
The ionosphere is a vitally dynamic charged particle region in the Earth's upper atmosphere, playing crucial role applications such as radio communication and satellite navigation. Slant Total Electron Contents (STEC) an important parameter for characterizing wave propagation, representing integrated electron density along ray of signals passing through ionosphere. accurate prediction STEC essential mitigating ionospheric impact particularly on Global Navigation Satellite Systems (GNSS). In...
The ionosphere is a vitally dynamic charged particle region in the Earth's upper atmosphere, playing crucial role applications such as radio communication and satellite navigation. slant total electron contents (STECs) are an important parameter for characterizing wave propagation, representing integrated density along ray of signals passing through ionosphere. accurate prediction STEC essential mitigating ionospheric impact particularly on Global Navigation Satellite Systems (GNSS). In this...
Ionospheric electron density monitoring is of great significance for positioning and navigation, communication technology space weather research. The improved tomography (DCS-PCA) method proposed in this paper based on the compressive sensing fusion data-driven (CS-PCA) method. can obtain real-time actual ionospheric characteristics by adding a dynamic measured module to CSPCA method, so DCS-PCA more suitable active ionosphere than CS-PCA. multi-GNSS observation collected from ground-based...