72 citations · 132 across the 8 of their papers we have counts for
8 papers
On the Practice of Deep Hierarchical Ensemble Network for Ad Conversion Rate Prediction
Jinfeng Zhuang, Yinrui Li, Runze Su +14
The predictions of click through rate (CTR) and conversion rate (CVR) play a crucial role in the success of ad-recommendation systems. A Deep Hierarchical Ensemble Network (DHEN) h…
Electron Mobility in Polarization-doped AlGaN with a Low Concentration Near 10 cm
Mingda Zhu, Meng Qi, Kazuki Nomoto +6
In this letter, carrier transport in graded AlGaN with a polarization-induced n-type doping as low as ~ 10 cm is repor…
Strained GaN Quantum-Well FETs on Single Crystal Bulk AlN Substrates
Meng Qi, Guowang Li, Satyaki Ganguly +8
We report the first realization of molecular beam epitaxy grown strained GaN quantum well field-effect transistors on single-crystal bulk AlN substrates. The fabricated double hete…
Unique opportunity to harness polarization in GaN to override the conventional power electronics figure-of-merits
Huili Grace Xing, Bo Song, Mingda Zhu +4
Owing to the large breakdown electric field, wide bandgap semiconductors such as SiC, GaN, Ga2O3 and diamond based power devices are the focus for next generation power switching a…
Dual Optical Marker Raman Characterization of Strained GaN-channels on AlN Using AlN/GaN/AlN Quantum Wells and 15N Isotopes
Meng Qi, Guowang Li, Vladimir Protasenko +10
This work shows that the combination of ultrathin highly strained GaN quantum wells embedded in an AlN matrix, with controlled isotopic concentrations of Nitrogen enables a dual ma…
Self-Assembled Ge QDs Formed by High Temperature Annealing on GaAs and AlxGa1-xAs (001)
William A. O'Brien, Meng Qi, Lifan Yan +5
This work studies the spontaneous self-assembly of Ge QDs on AlAs, GaAs, and AlGaAs by high temperature in-situ annealing in molecular beam epitaxy (MBE). The morphology of Ge dots…
Band Anticrossing in Dilute Germanium Carbides Using Hybrid Functionals
Chad A. Stephenson, William A. O'Brien, Meng Qi +3
Dilute germanium carbides (Ge1-xCx) offer a direct bandgap for compact silicon photonics, but widely varying results have been reported. This work uses ab initio simulations with H…
Ge Quantum Dots Encapsulated by AlAs Grown by Molecular Beam Epitaxy on GaAs Without Extended Defects
Meng Qi, Chad A. Stephenson, Vladimir Protasenko +4
We demonstrate nearly-spherical, strain-free, self-assembled Ge quantum dots (QDs) fully encapsulated by AlAs, grown on (100) GaAs by molecular beam epitaxy (MBE). The QDs were for…