A5085984639- Textile materials and evaluations
- Electrical Fault Detection and Protection
- Vibration and Dynamic Analysis
- Vacuum and Plasma Arcs
- Tunneling and Rock Mechanics
- Advanced Surface Polishing Techniques
- Electrostatic Discharge in Electronics
- Elevator Systems and Control
- Industrial Vision Systems and Defect Detection
- Advanced Sensor and Energy Harvesting Materials
- Structural Analysis and Optimization
- Ranque-Hilsch vortex tube
- Advanced Materials and Mechanics
- Ocular and Laser Science Research
- Smart Materials for Construction
- Spacecraft and Cryogenic Technologies
- Material Properties and Processing
- Metal Alloys Wear and Properties
- Advanced machining processes and optimization
- Mechanical Behavior of Composites
- Advanced Decision-Making Techniques
- Cyclone Separators and Fluid Dynamics
- Advanced Antenna and Metasurface Technologies
- Evaluation and Optimization Models
- Transition Metal Oxide Nanomaterials
Xi'an Jiaotong University
2025
Xidian University
2023-2024
Central South University
2020
Shandong University of Technology
2016
National Yang Ming Chiao Tung University
2015
Harbin Engineering University
2015
Electric Power Research Institute
2015
Eastern Liaoning University
2011-2014
Shenyang University of Technology
2010-2013
Beijing Institute of Graphic Communication
2013
Aerogels with porous structures offer an attractive approach to modulating electromagnetic parameters and enhancing wave (EMW) absorption performance. However, conventional aerogels are limited by their single-scale pore size fixed orientation, which constrain EMW capabilities. This study introduces dual-scale pores dual-network structure constructed via constant-temperature freezing secondary-infusion method. Multiscale both micrometer- submillimeter-scale when the Ti3C2Tx MXene...
Abstract With the in-depth study of thin-film structures, nonuniform thin films with rigid elements have been applied in aerospace and flexible electronics industries. For structures elements, there is an interaction force between element film; therefore, wrinkling mode film changes under influence force. In this study, a wrinkle model was developed to predict morphology on diagonal. First, patterns were observed at different positions using tensile experiments. Then, relationship tilt...
Using a self-designed hydraulic impact drilling test-bed and rock core drill, six groups of cylindrical granite specimens (93 mm dia. × 200 mm) containing central axial holes formed either by or nonimpact methods were tested in uniaxial compression to failure on an Instron 1346 universal testing machine investigate their mechanics damage properties. The longitudinal acoustic wave velocities measured before testing. grouped according the method hole (impact load exerted different power...
To explore the working mechanisms of a small diameter vortex tube and to improve its refrigeration performance, this study establishes three dimensional numerical simulation model by using standard kε turbulence inside flow field.Analysis results calculation combining with characteristics medium, thermodynamic process medium in has been given.At same time, method is proved feasible comparing experiment.Then relationships between portion structural parameters performance are analyzed discussed.
Effect of flat heel-toe difference (HTD) a card on neps sliver and yarn was studied. The were produced under different HTDs, doffer speeds cylinder speeds. in tested with Premier aQura evenness tester PT7000, respectively. significance HTD analysed SPSS. results show that has significant influence both neps, 0.42 mm plan is the best nep removing. correlation degree between numbers also It found number high yarn, sequence from to low (+140%), (+200%) (+280%). higher than seed coat (SCN) neps.
A fall-down recorder can record the happening of an object falling down during delivery or transportation, even after is recovered to its initial state. Here, a resettable, wireless and passive proposed by integrating droplet-based inertial force switch with inductor-capacitor (LC) circuit for signal transmission. magnetic droplet used in converging microchannel control desired threshold acceleration. When exceeds designed acceleration, will pass through deep cavity become different By...
In order to assess the reliability of circuit breaker more scientificly and effectively, a method based on improved fuzzy analytic hierarchy process genetic algorithm is presented in this paper.Firstly fault tree established according analyzing failures which make complex system into all kinds basic types failures; Secondly, Improved Fuzzy Analytic Hierarchy Process(IFAHP) designed analyze tree, it uses relationship between layers establish judgment matrix convert consistent qualification...
Effect of different gauge pin carding plate and saw-tooth respectively installed under the licker-in machine on polyester yarn hairiness was studied. The yarns produced in condition installing at four gauges were tested by YG172 tester. results show that two kinds 0.7mm are most beneficial to reducing number hairiness. When is 1.0mm 0.3mm, most. As a whole, more favorable for
The length of small gauge zone (SGZ) between cylinder and flat a card was studied mathematically. A formula to calculate the derived with geometry calculus methods, by which abscissa point at flat–cylinder minimal obtained. effect heel–toe difference (HTD), radius, setover, minimum gauge, as well outlet on SGZ discussed, respectively. It is concluded that smaller HTD longer setover will help lengthen SGZ. Given an appropriate value δ, be beneficial improving carding intensity. But influence...
Arc rapid diagnostic techniques can effectively and timely achieve reliable protection of electrical equipment or line fault arc which may occur. Depending on the feature that current waveform distorted when series occurred in device line, this proposed a method for recognition with waveforms comparison, to extract signal distortion amount thus rapidly diagnosis. Experimental results show algorithm is simple easy realize, has capability recognize rapidly, diagnosis effectively.
In order to explain the mechanism of high voltage interrupter, a particle in cell method is used our work simulate breakdown process before arc formation vacuum and SF6 circuit breaker. The electrons ions which play vital roles this are traced by Newton equation. from field emission, impact ionization secondary electron emission all considered simulation. effect space charge on motion charged particles here. Constant time step Monte Carlo cope with collisions between particles. For breaker,...
In order to explain the mechanism of high voltage interrupter, a particle in cell method is used our work simulate breakdown process before arc formation vacuum and SF6 circuit breaker. The electrons ions which play vital roles this are traced by Newton equation. from field emission, impact ionization secondary electron emission all considered simulation. effect space charge on motion charged particles here. Constant time step Monte Carlo cope with collisions between particles. For breaker,...
This paper presents the basic principle of gas leak ultrasonic produce, use transducer array collecting signal, signal filtering and power spectrum estimation processing algorithms, intelligent detection system is developed. The detector convenient to use, can realize quick check leak, application virtual instrument for leakage analysis processing, implementation leakage.
A new vortex tube structure with small length-diameter ratio, low resistance coefficient and high efficiency based on the basic principle of helicopter is designed by numerical computation experimental study in this paper. The average value error between experiment simulation within 5.6%. This indicates mathematic model can estimate very well. It provided a feasible way for optimal design tube.
Effect of carding machine using gill pin taker-in on polyester yarn hairiness was studied. The the processed by with and saw-tooth respectively, which three-grade speed tested YG172 Yarn Hairiness Tester. results show that (1) when taker-in, it is most advantageous to reduction 2 mm above 1290 r/min, while 3 820 r/min; (2) (3) more than as a whole.
The character of the tension control in plastic-film printing was introduced, and coiler drive method given. indirect constant analyzed, key parameters were given, also coil diameter measurement with distance meter, friction torque different rotate speed given by test; rotational inertia which influence dynamic put forward.
The cylinder-flat gauge of 0.56 mm heel-toe difference (HTD) flat with 3 mm-long plane ground on setover was calculated by the method geometry. change curves were given using MATLAB software under three conditions HTD flat, setover, and 0.49 flat. It conclude that average adopted is smaller than realized easily in processing.