A5101903596- Laser Material Processing Techniques
- Advanced Surface Polishing Techniques
- Advanced MEMS and NEMS Technologies
- Mechanical and Optical Resonators
- Erosion and Abrasive Machining
- Photonic and Optical Devices
- Tribology and Lubrication Engineering
- Adaptive Control of Nonlinear Systems
- Advanced Sensor and Energy Harvesting Materials
- Advanced machining processes and optimization
- Gas Sensing Nanomaterials and Sensors
- Tactile and Sensory Interactions
- Software System Performance and Reliability
- Optical Wireless Communication Technologies
- Nanotechnology research and applications
- Nanoplatforms for cancer theranostics
- Adhesion, Friction, and Surface Interactions
- High-Temperature Coating Behaviors
- Radiative Heat Transfer Studies
- Electron and X-Ray Spectroscopy Techniques
- Advanced Sensor Technologies Research
- Spectroscopy Techniques in Biomedical and Chemical Research
- Aerodynamics and Fluid Dynamics Research
- Heat Transfer and Optimization
- Heat Transfer Mechanisms
People's Liberation Army 401 Hospital
2025
Harbin Institute of Technology
2015-2023
Xiamen University
2021
Beijing Institute of Technology
1988-2016
Xidian University
2012-2015
Xi'an International Studies University
2014
Beihang University
2013-2014
Wuhan University of Science and Technology
2011
Ricardo Prague (Czechia)
2004
Functional materials with high viscosity and solid have received more attentions in flexible pressure sensors, which are inadequate the most used molding method. Herein, laser direct writing (LDW) method is proposed to fabricate piezoresistive sensors microstructures on PDMS/ MWCNTs composites an 8% mass fraction. By controlling energy, different geometries can be obtained, significantly impacts performances of sensors. Subsequently, curved microcones excellent performance fabricated under...
The diagnostic yield of conventional gastrointestinal (GI) endoscopy for early cancers is low because it mainly based on morphological changes tumors. Molecular functional in tumors precede changes. Cherenkov luminescence (CLE) system can perform molecular imaging GI cancers, achieving diagnosis cancers. However, previous CLE systems had only been able to detect (CL) from about one μCi nuclide at a minimum (in vivo), but the probe absorbed by tumor patient was often much less than routinely...
The air valve is the core component of cyclic operation compressor cylinder, and its structure performance largely determine whether reciprocating can operate more efficiently economically. On basis analyzing basic working principle valve, this article mainly studies motion characteristics suction plate. Based on fluid coupling mechanics using ADINA software as a platform, numerical simulation analysis was conducted certain model. Studying stress plate variation upper lower surface pressure...
In the nanolithography, some exciting developments have been motivated by tapered metal-coated optical fiber probe irradiated ultra-fast pulse laser. To explore related mechanism, local field is studied using finite element method in this paper. The simulation results show reflection at cut-off plane, edge enhancement effect and surface plasmon resonance become major factors affecting near-field. addition, Based on near-field distribution characteristics, new promising scheme proposed for...
SiC/SiC ceramic matrix composites (CMCs) are widely applied in the aerospace and nuclear industries due to their excellent material nature (strength, hardness, irradiation tolerance) at high-temperature loads. However, high-quality machining cannot be easily realized because of anisotropic structure its properties. In this study, a laser water jet (LWJ) was adopted for CMCs machining. Firstly, finite element model (FEM) established describing representative three-dimensional microstructure...
Monocrystalline silicon has shown great potential in constructing advanced devices semiconductor, photoelectric, and photochemistry fields. The fabrication of micro-grooves with large depth-to-width ratio (DTWR) low taper is urgent demand as this type groove can significantly promote the device performance. grooves such characterizations hardly be achieved by conventional machining techniques owing to high hardness brittleness silicon. Laser waterjet (LWJ) a promising solution, which capable...
In this study, the novel coaxial-annulus-argon-assisted (CAAA) atmosphere is proposed to enhance machining capacity of water-jet-guided laser (WJGL) when dealing with hard-to-process materials, including ceramic matrix composites (CMCs) and chemical-vapor-deposition (CVD) diamond. A theoretical model was developed describe two-phase flow argon water jet. Simulations experiments were conducted analyze influence pressure on working length WJGL beam, drainage circle size, extreme scribing depth...
The shock dissemination of granular rings or shells is characterized by the formation coherent particle jets that have different dimensions from those associated with constituent grains. In order to identify mechanisms governing jets, we carry out simulations dispersal quasi-two-dimensional based on discrete-element method. evolution velocities and contact forces time scales ranging microseconds milliseconds reveals a two-stage development before they are expelled outer surface. Much effort...
Electrostatically driven torsional micromirrors are suitable for optical microelectromechanical systems due to their good dynamic response, low adhesion, and simple structure large-scale-integrated applications. For these devices, how eliminate the excessive residual vibration in order achieve more accurate positioning faster switching is an important research topic. Because of known nonlinearity issues, traditional shaping techniques based on linear theories not nonlinear micromirrors. In...
Fast settling, accurate positioning, and a large tilt angle range are important for MEMS mirrors. Here, residual vibration the pull-in phenomenon—both major problems affecting performance of an electrostatically actuated mirror—are investigated. Based on analysis nonlinear proportional-derivative (PD) control with parametric uncertainties, closed-loop feedback strategy combined scheme is proposed. This method, combining PD sliding mode (SMC), not only inherits virtue good dynamic from...
Evaluation of squeezed film air damping is critical in the design and control dynamic MEMS devices. The published models are generally derived from analytical solutions Reynolds equation or its other modified forms under supposition trivial pressure boundary conditions on peripheral borders. These treatments ignoring border effect can not give faithful result for structure with smaller venting gap double-gimbaled which inner frame outer one affect venting. In this paper, we use Green’s...
Three main obstacles in modeling electrostatic torsional micromirror are hard to calculate – damping coefficient, mechanical spring constant and torsion accurately. Because that parameter variations model uncertainty of the resulting from fabrication imperfections inevitable, it is another problem seek a control scheme for achieving accurate positioning trajectory tracking an micromirror. In this paper, aimed at real prototype circular micromirrorr, both static dynamic behaviors modeled...
Although numerical attacks on the problem of transition (loss criticality) in thermally igniting systems with generalized resistance to heat transfer are always possible, they particular cases studied. Very general circumstances may be treated analytically by perturbation methods (asymptotic expansion). Asymptotic expressions considerable precision starting from Semenov extreme (( Bi ) = 0) can made terms Biot number ( ). They apply any geometry, and presented here for infinite slab,...
Graphical User Interfaces (GUI) is becoming increasingly important in the software field, while GUI testing key issues restricting rapid development. mainly serves two goals: to establish confidence assessment of and find more defects testing. For this purpose, any method must be better at detecting defects. However, faced with many challenges due immense number event interactions. In paper, it introduces a Bayesian model guiding process testing, discusses topology its encountered modeling...
Although the nanostructure machining by AFM probe assisted with laser has gain a great progress, few studies been done on optical fiber guiding continuous to irradiate nanostructure. Using this technology create nanodot and nano-groove was presented in paper. The law of how experiment parameters influenced results summarized scale is about 450nm, 40nm. When fabrication completed, wear observed SEM drew conclusion. In method nano Probe combining CW Laser, there will be combined field achieve...
Field synergy between the molten steel flow field and temperature distribution was analyzed at first in this paper. It shows when angle gradient is more than 90° tundish, homogeneous number smaller. Then fields distributions one-strand tundish established with different controls were numerically calculated. The results show that angles are back-flow zones gradually decrease as far from till to almost 0°. large near wall boundary around stopper. When equipped a turbulence inhibitor, weir dam,...
Microalgae are an important source for biodiesel, one kind of renewable energy. The turbulence the algal fluid can be intensified through optimizing structure parameters disturbing devices and operation conditions in photobioreactor, thereby algae production increased. Turbulent kinetic energy is measurement intensity. Through control variable method, turbulent simulated by means Computational Fluid Dynamics (CFD). Based on simulation, slope angle interval distance two neighboring whose...