document

Machine learning assisted early anomaly detection of LEDs with spectral power distribution modeling

Liu, Minne (author), Ibrahim, Mesfin S. (author), Wen, Minzhen (author), Li, Sheng (author), Wang, An (author), Zhang, Kouchi (author), Fan, J. (author)

Spectral power distribution (SPD) is the radiation power intensity at different wavelengths, containing the most basic photometric and colorimetric performance of the illuminant, which is able to predict the lifetime of LEDs. This paper proposes an SPD model assisted by machine learning algorithms to detect the early failure of white LEDs. The...

conference paper 2023

document

Research on Thermal-Mechanical Properties of GaN Power Module Based on QFN Package by Using Nano Copper/Silver Sinter Paste

Li, Shizhen (author), Liu, X. (author), Fan, Jiajie (author), Tan, C. (author), Wang, S. (author), Xie, Bin (author), Ye, H. (author)

The wide-bandgap semiconductors represented by GaN have a broad application prospect because of their high service temperature and high switch frequency. Quad-Flat-No-Lead (QFN) Package is currently one of the mainstream packaging methods due to its low cost and high efficiency. However, the low reliability of QFN used in GaN devices is still...

conference paper 2022

document

Decoupled textures for broadband absorption enhancement beyond Lambertian light trapping limit in thin-film silicon-based solar cells

Vismara, R. (author), Dane Linssen, N. P. (author), Wang, Ken X. (author), Fan, Shanhui (author), Isabella, O. (author), Zeman, M. (author)

We present a modelling study of thin silicon based solar cells endowed with periodic and decoupled front/back textures. After careful optimization, the proposed device models exhibit absorption beyond the Lambertian light trapping limit for a wide range of light angles of incidence. The advanced light management scheme is applied to (nano...

conference paper 2018

document

Warpage deformation analysis of AMB ceramic substrates in power modules

Hu, D. (author), Wang, Chieh (author), Li, Z. (author), Gupta, N. (author), Poelma, René H. (author), Shi, Ziliang (author), Fan, J. (author), Zhang, Kouchi (author)

Driven by the increasing demand for high-power systems, ceramic substrates have received more attention for handling higher power density. Warpage in active metal brazed (AMB) ceramic substrate becomes a critical issue as it can deteriorate the reliability performance. This study comprises three phases, including investigation of the cause of...

conference paper 2024

document

Double-sided heat dissipation numerical modeling of an embedded half-bridge power module with multiple chips

Li, Wenyu (author), Chen, Wei (author), Jiang, Jing (author), Wang, Wenbo (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, Jiajie (author)

Thermal management has always played a significant role in power module design. Double-sided heat dissipation is more efficient at transferring heat than the traditional package. Although there are several thermal modeling approaches to power modules, the application of the numerical models, which are computationally fast and accurate, has...

conference paper 2024

document

A transferable force field for CdS-CdSe-PbS-PbSe solid systems

Fan, Z. (author), Koster, R.S. (author), Wang, S. (author), Fang, C. (author), Yalcin, A.O. (author), Tichelaar, F.D. (author), Zandbergen, H.W. (author), Van Huis, M.A. (author), Vlugt, T.J.H. (author)

journal article 2014

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Prediction of mechanical solutions for a laminated LCEs system fusing an analytical model and neural networks

Wang, Jue (author), Yuan, Weiyi (author), Li, Z. (author), Zhu, Yingcan (author), Santos, Thebano (author), Fan, J. (author)

This paper presents a convenient and efficient method to predict the mechanical solutions of a laminated Liquid Crystal Elastomers (LCEs) system subjected to combined thermo-mechanical load, based on a back propagation (BP) neural network which is trained by machine learning from a database established by analytical solutions. Firstly, the...

journal article 2022

document

Distinctive sedimentary processes on two contrasting tidal flats of the Yellow River Delta

Xie, Weiming (author), Sun, J. (author), Guo, Leicheng (author), Xu, Fan (author), Wang, Xianye (author), Ji, Hongyu (author), Fan, Yaoshen (author), Wang, Zhengbing (author), He, Qing (author)

Coastal tidal flats provide valuable ecosystems, but are highly sensitive to tidal dynamics, sea-level rise, and human activities. Tidal inundation depth and frequency are known to affect tidal flat morphodynamics. However, the causes, processes and extent remain uncertain, particularly given the associated changes in sediment availability. In...

journal article 2023

document

Reliability assessment of ultra-deep oil and gas wellbore casing using data statistics and numerical simulations

Yang, Shangyu (author), Zhang, Renren (author), Wang, Jianjun (author), Li, Xinhong (author), Fan, Heng (author), Yang, M. (author)

Ultra-deep oil and gas wells have become a new development trend in onshore oil and gas exploitation. However, Ultra-deep oil and gas wellbore casing is with high failure risk due to the harsh environment. It is essential to evaluate the reliability of wellbore casing. This paper assesses the operational reliability of wellbore casing using...

journal article 2020

document

Effects of GBFS content and curing methods on the working performance and microstructure of ternary geopolymers based on high-content steel slag

Yang, Xinkui (author), Wu, Shaopeng (author), Xu, S. (author), Chen, B. (author), Chen, Dongyu (author), Wang, Fusong (author), Jiang, Jian (author), Fan, Lulu (author), Tu, Liangliang (author)

Aimed to address the low utilization rate of steel slag (SS) and its challenge in resource utilization in China, this study developed ternary geopolymers made by high-content (50%) SS together with fly ash (FA) and granulated blast furnace slag (GBFS). The effects of GBFS content (0–40%) and curing methods (water curing, standard curing,...

journal article 2023

document

Assessment of Vigilance Level during Work: Fitting a Hidden Markov Model to Heart Rate Variability

Wang, Hanyu (author), Chen, Dengkai (author), Huang, Y. (author), Zhang, Yahan (author), Qiao, Yidan (author), Xiao, Jianghao (author), Xie, Ning (author), Fan, Hao (author)

This study aimed to enhance the real-time performance and accuracy of vigilance assessment by developing a hidden Markov model (HMM). Electrocardiogram (ECG) signals were collected and processed to remove noise and baseline drift. A group of 20 volunteers participated in the study. Their heart rate variability (HRV) was measured to train...

journal article 2023

document

Shear-slip behaviour of prefabricated composite shear stud connectors in composite bridges

Gao, Yanmei (author), Li, Chengjun (author), Wang, Xuefei (author), Zhou, Zhixiang (author), Fan, Liang (author), Heng, J. (author)

This paper has investigated the shear-slip behaviour of an innovative prefabricated composite shear stud (PCSS) connector and its application in the prefabricated steel–concrete composite bridges. A series of push-out tests are carried out on a total of 12 specimens, including 6 PCSS specimens and 6 conventional shear stud (CSS) specimens....

journal article 2021

document

Naturally effective inhibition of microbial corrosion on carbon steel by beneficial biofilm in the South China Sea

Gao, Yu (author), Zhang, Jingru (author), Wang, Donglei (author), Fan, Jiaxin (author), Mol, J.M.C. (author), Wang, Fuhui (author), Zhang, Danni (author), Xu, Dake (author)

Microbially influenced corrosion (MIC) of metals exerts a negative effect on the marine environment and causes a great loss of marine facilities. Corrosion prevention in an eco-friendly and sustainable way is a difficult problem to address, especially in the marine environment. In this work, Nocardiopsis dassonville, a corrosive bacteria...

journal article 2024

document

Tensile characterization and constitutive modeling of sintered nano-silver particles over a range of strain rates and temperatures

Qian, Cheng (author), Gu, Tijian (author), Wang, Ping (author), Cai, Wei (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, J. (author)

Sintered nano-silver die-attach materials have been widely used in high-power electronics packaging because of their high thermal and electrical conductivities. In this study, we characterized the tensile properties of sintered nano-silver particles over a range of strain rates and temperatures, and established the constitutive models. First, 50...

journal article 2022

document

Design knowledge graph-aided conceptual product design approach based on joint entity and relation extraction

Huang, Y. (author), Yu, Suihuai (author), Chu, Jianjie (author), Su, Zhaojing (author), Zhu, Yaokang (author), Wang, Hanyu (author), Wang, Mengcheng (author), Fan, Hao (author)

Design knowledge is critical to creating ideas in the conceptual design stage of product development for innovation. Fragmentary design data, massive multidisciplinary knowledge call for the development of a novel knowledge acquisition approach for conceptual product design. This study proposes a Design Knowledge Graph-aided (DKG-aided)...

journal article 2023

document

Effect of epoxy resin addition on properties and corrosion behavior of sintered joints in power modules serviced offshore

Wang, Xinyue (author), Yang, Zhoudong (author), Wang, Boya (author), Chen, Wei (author), Zhang, Kouchi (author), Zhang, Jing (author), Fan, J. (author), Liu, P. (author)

Power modules applied in offshore applications are facing risks of corrosion failures on die-attach materials due to high humidity and H₂S exposure. To investigate such corrosion behavior for sintered die-attach materials, we conducted a study with four groups of samples fabricated using copper and silver metal particles under...

journal article 2023

document

A neural network-assisted 3D theoretical thermoelastic solution for laminated liquid crystal elastomer plate used in restoring cardiac mechanical function

Wang, Jue (author), Yuan, Weiyi (author), Li, Z. (author), Trofimov, Yuri (author), Lishik, Sergey (author), Fan, J. (author)

Some atrial contractile assist devices applied on the heart surface can be regarded as a laminated Liquid crystal elastomer (LCE) plate under steady temperature loads and a contact mechanical force. An exact solution for the deformation of the laminated LCE plate under combined thermal and mechanical loads is derived by solving the three...

journal article 2022

document

Negative Effects of Inorganic Salt Invasion on the Dissociation Kinetics of Silica-Confined Gas Hydrate via Thermal Stimulation

Fang, B. (author), Lu, T. (author), Cheng, Liwei (author), Wang, Dongdong (author), Ni, Yang (author), Fan, Bowen (author), Meng, Jiuling (author), Vlugt, T.J.H. (author), Ning, Fulong (author)

Methane hydrate dissociation kinetics can be inhibited in NaCl solutions; however, this effect is reversed by promoting bubble formation that enhances dissociation. The negative and positive effects of inorganic salt injection on gas production from hydrate-bearing sediments are still controversial. Here, molecular dynamics simulations were...

journal article 2022

document

Conductive Co-based metal organic framework nanostructures for excellent potassium- and lithium-ion storage: Kinetics and mechanism studies

Mao, Pengcheng (author), Fan, Huilin (author), Liu, Chang (author), Lan, Gongxu (author), Huang, Wei (author), Li, Zhipeng (author), Amin Hassan, H.M. (author), Zheng, Runguo (author), Wang, Zhiyuan (author), Sun, Hongyu (author), Liu, Yanguo (author)

Thanks to the low cost and earth's abundant potassium resources, potassium ion batteries (PIBs) have attracted much interest as alternative energy storage devices. However, there is still a great challenge to develop suitable anode materials for PIBs with high specific capacity, fast charge/discharge and stable ion storage. Nowadays,...

journal article 2022

document

Plot-level reconstruction of 3D tree models for aboveground biomass estimation

Fan, Guangpeng (author), Xu, Zhenyu (author), Wang, Jinhu (author), Nan, L. (author), Xiao, Huijie (author), Xin, Zhiming (author), Chen, Feixiang (author)

Complexity of forest structure is an important factor contributing to uncertainty in aboveground biomass estimates. In this study, we present a new method for reducing uncertainty in forest aboveground biomass (AGB) estimation based on plot-level terrestrial laser scanner (TLS) point clouds reconstruction. The method estimates the total AGB...

journal article 2022