A5061309521- Human Mobility and Location-Based Analysis
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Recommender Systems and Techniques
- Data Management and Algorithms
- Spectroscopy and Laser Applications
- Machine Fault Diagnosis Techniques
- Advanced Measurement and Metrology Techniques
- Optimization and Search Problems
- Silicon Carbide Semiconductor Technologies
- Spectroscopy and Chemometric Analyses
- Complex Network Analysis Techniques
- Water Systems and Optimization
- Radiation Effects in Electronics
- Electronic Packaging and Soldering Technologies
- Data Visualization and Analytics
- Data Mining Algorithms and Applications
- 3D IC and TSV technologies
- Particle Detector Development and Performance
- Advanced Data Compression Techniques
- Microfluidic and Bio-sensing Technologies
- Library Collection Development and Digital Resources
- Spectroscopy Techniques in Biomedical and Chemical Research
Northeast Petroleum University
2011-2024
Dalian University of Technology
2021-2024
Dalian University
2021
Tongji University
2021
Simon Fraser University
2015-2018
Harbin Institute of Technology
2012
Qufu Normal University
2009
As location-based social network (LBSN) services become increasingly popular, trip recommendation that recommends a sequence of points interest (POIs) to visit for user emerges as one many important applications LBSNs. Personalized tailors users' specific tastes by learning from past check-in behaviors users and their peers. Finding the optimal maximizes user's experiences given time budget constraint is an NP hard problem previous solutions do not consider two practical constraints. One POI...
As location-based social network (LBSN) services become increasingly popular, trip recommendation that recommends a sequence of points interest (POIs) to visit for user emerges as one many important applications LBSNs. Personalized tailors users’ specific tastes by learning from past check-in behaviors users and their peers. Finding the optimal maximizes user’s experiences given time budget constraint is an NP-hard problem previous solutions do not consider three practical constraints. One...
We propose a sensor based on the integration of self-mixing interference (SMI) with microfiber, for human health monitoring. Through power variation reflected light from microfiber which is embedded into polydimethylsiloxane (PDMS), we are able to accurately monitor pulse waves continuously and in real time, blood pressure successfully monitored via transmission time (PTT). measured systolic (SBP) diastolic (DBP) volunteers measurement error <inline-formula...
The interconnecting solder is a key control factor for the reliability of electronic power packaging because it highly affects junction temperature insulated-gate bipolar transistor (IGBT) modules and prone to plasticity, creep, other failure behaviors under temperature-change environments. In this paper, performance fatigue life five different kinds solders such as SAC305, sintered silver, Au80Sn20, copper, pure direct current (DC), cycle, electro-thermal coupling complex environments were...
We consider a practical top-k route search problem: given collection of points interest (POIs) with rated features and traveling costs between POIs, user wants to find k routes from source destination limited in cost budget, that maximally match her needs on feature preferences. One challenge is dealing the personalized diversity requirement where users have various trade-off quantity (the number POIs specified feature) variety coverage features). Another large scale POI map great many...
A novel reconstruction method of nanometer micro-displacement Fabry–Perot (F-P) interference is proposed in this study. Hilbert transforms are performed for F-P fringes, and the obtained signal performs tangent operation with original signal. Finally, validity algorithm structure verified by simulation several experimental measurements vibration. Results from experiments show that maximum relative error 4.9%.
Issues concerning natural gas pipeline leakage are becoming more prominent than ever because of the continuing expansion networks. Although many scholars have extensively investigated generation and detection methods for acoustic signals, systematic research on characteristics interference signals remains insufficient. Results show that method based RBF kernel function is feasible fault diagnosis, yielding 100% sensitivity, 92% specificity, 96% accuracy.
In this study, we propose a new optical fiber interferometer based on differential structure. The phase delay exists in the two output arms of coupler. When interference signal passes through twice transmission, it produces shift <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>π</mml:mi> </mml:math> with original signal. This feature can be used to differentially reduce noise. experimental results show that signal-to-noise ratio increases by 1.29 dB, and...
To meet high radiation challenge for detectors in future high-energy physics, a novel 3D 4H-SiC detector was investigated. SiC could potentially operate harsh and room temperature environment because of its thermal conductivity atomic displacement threshold energy. structure, which decouples thickness distance between electrodes, further improves timing performance hardness the detector. We developed simulation software - RASER (RAdiation SEmiconductoR) to simulate time resolution planar...
Summarizing patterns of connections or social ties in a network, terms attributes information on nodes and edges, holds key to the understanding how actors interact form relationships. We formalize this problem as mining top-k group relationships (GRs), which captures strong between groups actors. While existing works focus that follow from well known homophily principle, we are interested do not homophily, thus, provide new insights. Finding GRs faces challenges: it requires novel ranking...
When utilizing the tunable diode laser absorption spectroscopy technique for gas concentration measurement, second harmonic signal is significantly affected by noise, leading to a decrease in measurement accuracy. We proposed noise reduction algorithm address this issue. It combines multi-resolution singular value decomposition (MRSVD) and an improved complete ensemble empirical mode with adaptive (ICEEMDAN) optimized crested porcupine optimizer (ICPO) algorithm. First, MRSVD utilized...
To measure the vibration of a target by laser self-mixing interference (SMI), we propose method that combines feature extraction and random forest (RF) without determining feedback strength (C). First, temporal, spectral, statistical features SMI signal are extracted to characterize original signal. Secondly, these interpretable fed into pretrained RF model directly predict amplitude frequency (A f) vibrating target, recovering periodic target. The results show combination yields fit more...
An image enhancement algorithm based on genetic and lifting wavelet method is proposed in this paper. This improves crossover operation algorithm. It utilizes average displacement for mutation operation. Probabilities of are selected adaptively. We have decided the fitness function, implemented multi-thread design. The optimizes prediction updating operator by means decision improved. contrast ration between object background increased. details images reserved well. noise reduced, very efficient.
An enhanced self-mixing interference (SMI) method in a laser diode (LD) based on Fabry-Perot etalon (FPE) is presented. This uses uncoated fused silica to form FPE as narrowband filter the LD outer cavity, which can tune wavelength edge of transmission spectrum profile perform intensity demodulation. We compare SMI signal with conventional signal. The experimental results show that amplitude about 5 times range 1 µm-5 µm; displacement reconstruction errors are reduced by 30 nm; and quality...
This quantitive researchwas conducted to compare the efficiency between three groups of machine learning’ classification techniques for detecting broken rotor bar (BRB)fault in induction motor using stator currents signals with two different signal processing method. Thus, main purpose article is find out most suitable method distributing and extracting data fault diagnosis problems. Two common used –Discrete Wavelet Transform (DWT) Fast Fourier (FFT)has been implemented extract statiscal...
Using data mining's decision tree classification, DBSCN cluster analysis, and K-nearest neighbor algorithm realizes the information mining of natural gas pipeline leak, alse uncovers objective laws behind transmission, intrinsically linking to each parameter development trend. We could reduce risk accidents economic losses, in order control transmission advance.
For the sake of low recognition rate for degraded Chinese document, retrieval performance is not good if directly based on OCR result. In this paper, an indexing method with n-gram and candidates proposed to improve retrieval. ease test, paper also presents a automatically generate ground-truth imaged synthesized document image candidates. Several collections large-scale are built used, experimental results show that improved both high or error rates.
Abstract A fast calculation algorithm of efficiency map permanent magnet synchronous machines using finite-element (FE) method is proposed in this paper. The control strategy the machine can be taken into account whole torque-speed operating region. optimal current vector obtained by analytical calculations, where material saturation also included. By method, only one run time-stepping FE analysis required below rated speed. time much reduced compared to conventional method. An example...
A real-time reconstruction of the displacement method based on an orthogonal Fabry–Perot interferometer is presented. Two polarization signals with a phase shift <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>π</mml:mi> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mo>/</mml:mo> </mml:mrow> <mml:mn>2</mml:mn> </mml:math> are obtained using He–Ne laser internal-mirror multilayer coatings. The vibration target reconstructed in real time arctangent and unwrapping...