A5101812179- Reliability and Maintenance Optimization
- Particle Dynamics in Fluid Flows
- Structural Health Monitoring Techniques
- Atmospheric aerosols and clouds
- Risk and Safety Analysis
- Fatigue and fracture mechanics
- Non-Destructive Testing Techniques
- Engineering Applied Research
- Advanced Welding Techniques Analysis
- Advancements in Battery Materials
- Gear and Bearing Dynamics Analysis
- Power Systems and Renewable Energy
- Granular flow and fluidized beds
- Advanced Battery Materials and Technologies
- Seismic Performance and Analysis
- Cyclone Separators and Fluid Dynamics
- Welding Techniques and Residual Stresses
- Software Reliability and Analysis Research
- Vibration Control and Rheological Fluids
- Power System Reliability and Maintenance
- Advanced Algorithms and Applications
- Optical Polarization and Ellipsometry
- Collaboration in agile enterprises
- Surface Roughness and Optical Measurements
- Hydraulic and Pneumatic Systems
Harbin University of Science and Technology
2014-2025
Naval Aeronautical and Astronautical University
2012-2014
TED University
2011
North China University of Science and Technology
2011
Accurate prediction of the life degradation trajectory clock battery, a critical component power meter, is essential for assessing reliability device. Addressing computational inefficiency and limited generalization capabilitie s traditional empirical recession models, this paper introduces model based on Informer neural network. The battery data are initially segmented reassembled using sliding window strategy. encoder-decoder structure then employed to achieve multilevel feature extraction...
Recent developments in humidity sensors have heightened the need for reliability. Seeing as many products such experience multiple dependent competing failure processes (MDCFPs) with self-recovery, this paper proposes a new general reliability model. Previous research into MDCFPs has primarily focused on of degradation and random shocks, which are appropriate most products. However, existing models cannot fully characterize significant leading to an underestimation In paper, effect...
The deposition of micron particles in gas pipelines has always been an important problem ultra-clean ventilation technology the modern laser fusion, precision electronics, aerospace, and biomedical fields. Combining mathematical expression migration, collision, a pipeline with simulation flow fields, two-parameter particle probability model based on vinl, θcr collision coefficient PP is established, distribution law deposition, considering two targets pipe wall layer, given. Combined...
The problem of particle clogging in a conveying pipeline thin-phase pneumatic transportation is essentially the effect particle-deposition mechanism gas–solid two-phase flow. This paper presents model flow based on ellipsoid hypothesis, and fast-calculation method material efficiency industry tabular-assigned drag-correction coefficient ellipsoid-shape parameter Ar incoming angle ϕ. A simulation comparison spherical particles under same transport conditions experimental verification...
So far, there is a question about the existing study of electromagnetic relay's life prediction :they mainly focused on research batch products as whole, which cannot reflect individual differences. This paper proposes one kind way relay based Bayesian method. Firstly, prior distribution model parameters determined basis degradation model. Then, data (contact resistance) fused, and degenerate trajectory are updated to obtain reliability function. Finally, we can predict lifetime single...
Recently determination of harmful elements in fertilizer has been paid growing attention. The method cobalt by Wavelength Dispersive X-ray Fluorescence Spectrometry (WD-XRF) is developed. calibration samples are made blank compound to simulate the matrix. sample covered with microcrystalline cellulose pressed at 35t for 60s, and content determined WD-XRF. This a good repeatability accuracy linearity ranges 0-2000mg/kg. relative standard deviation not more than 2.0%. results obtained from...
Reliability assessment methods for engine driven pump were studied using field failure/maintenance records including left censored and right data, confidence limits of reliability measures given. Engineering assumptions established according to the background commercial airline operating process EDP maintenance, then lifetime data obtained from records. Furthermore, parameters life distributions computed based on Weibull distribution lognormal distribution, best was identified by likelihood...
The exploration of the optical properties charged particles is essential for detection ultrafine particles. In this paper, complex refractive index model and scattering spherical are re-established to make them suitable both electrically neutral Taking pure-water droplets salt-water as examples, effects surface charge on non-dissipative dissipative discussed. On basis, excess parameters droplets, inorganic oxide organic compound discussed with three typical Furthermore, it confirmed that...
The reliability of smart electricity meters was significantly affected by environment, field operation testing conducted in high altitude locations, and one year data including power error were collected. This paper investigated the degradation behaviors with help Wiener process. variation coefficients introduced to analyze characteristics unknown parameters model. Reliability estimates computed according maximum likelihood compared results from different parameter characteristics. A case...
Calendar ageing is one of the most important degradation behaviors for electrochemical double layer capacitors (EDLCs) in many engineering applications which severely impacts EDLC's life and reliability. EDLCs from model A, B, C degraded under room temperature 0 V, capacitance direct current resistance (DCR) EDLC samples were measured at temperature, based on consistency analyzed. From histograms coefficients variance, distributions DCR obtained. It can be concluded that samples' generally...
In the midst of highly corrosive marine environment corrosion damage is very critical in aircraft structure. Corrosion will reduce fatigue strength and life The notch factor a important factor, which directly affects accuracy estimation result. LY12CZ aluminum alloy structure was accelerated tested according to equivalent testing spectrum based on key data, then made test. According test data calculated variation law with studied.
This document explains and demonstrates how to predict the fault point of rolling bear. Rolling bearing vibration signals are decomposed by LMD method get several single components including amplitude modulation frequency signals. Combing order analysis can
In order to improve the effect of isolation structure, principles and behaviours base-isolation system are studied, types characteristics also discussed. Compared traditional aseismatic structures, base structures decrease seismic response obviously: total structural value 1/4-1/32, shear stress in upper structure 1/14-1/23. huge seism, can have obvious effect.
To solve the problem that reliability assessment of complex systems was difficult due to lack information in development stage, a hybrid Bayesian method based on KL divergence proposed this paper. The probability distribution failure rate at each test stage calculated using data from previous stages, which were transferred as prior final and then theory used calculate posterior system's rate. Considering difference between current mixed constructed by introducing similarity factor method,...
Fatigue life can be divided into crack initiation and propagation in fatigue damage process. comes of the initial discontinuity states （IDS） material, goes through short , long rupture failure. A estimation model based on fracture theory is built, which includes IDS, crack, holistic (including life, residual calendar ) was built basis IDS aircraft structures had not been corrosion damage. lot tests with different stress level ratio are carried out to validate model. The results demonstrate...