Nguyễn Duy Hiếu

ExpertHTR: Unified Handwritten Text Recognition with Multi-Task Learning and Sparse Mixture-of-Experts

Dong‐Hyun Nam, Nguyễn Duy Hiếu, Quang Huu Hieu, Vo Nguyen Le Duy

Handwritten text recognition resources are often small and distributed across collections that differ in language, script, document structure, and annotation format, making joint page-level training difficult. We propose ExpertHTR, a unified vision-language framework that addresses this problem through complementary supervision and conditional …

SpiS-GAN: Spiral-Modulated Handwriting Synthesis with Star Operation

Nguyễn Duy Hiếu, Dong‐Hyun Nam, Pham Hoang Giap, Quang Huu Hieu et autres

Training robust handwriting recognition (HTR) systems requires massive amounts of annotated data, which is often difficult to acquire. While synthetic handwriting generation offers a practical solution to expand training sets, existing models struggle with several core issues. First, previous approaches, even MLP-based …

SpiS-GAN: Spiral-Modulated Handwriting Synthesis with Star Operation

Nguyễn Duy Hiếu, Dong‐Hyun Nam, Pham Hoang Giap, Quang Huu Hieu et autres

Training robust handwriting recognition (HTR) systems requires massive amounts of annotated data, which is often difficult to acquire. While synthetic handwriting generation offers a practical solution to expand training sets, existing models struggle with several core issues. First, previous approaches, even MLP-based …

Decoupled charge and heat transport in Fe2VAl composite thermoelectrics with topological-insulating grain boundary networks

Fabian Garmroudi, Illia Serhiienko, Michael Parzer, Sanyukta Ghosh et autres

Abstract Decoupling charge and heat transport is essential for optimizing thermoelectric materials. Strategies to inhibit lattice-driven heat transport, however, also compromise carrier mobility, limiting the performance of most thermoelectrics, including Fe 2 VAl Heusler compounds. Here, we demonstrate an innovative approach, which …

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Homogenizing composition to achieve high-performance Mg3Bi2-type thermoelectrics

Longquan Wang, Airan Li, Jiankang Li, Naoyuki Kawamoto et autres

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Tổng quan về tổng hợp hạt nano bằng phương pháp phóng điện qua dây mỏng

Nguyễn Duy Hiếu, Minh Chu Ngo

Topological-insulating grain boundary networks for high-performance Fe2VAl thermoelectrics

Fabian Garmroudi, Illia Serhiienko, Michael Parzer, Sanyukta Ghosh et autres

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Decoupled charge and heat transport for high-performance Fe$_2$VAl composite thermoelectrics

Fabian Garmroudi, Illia Serhiienko, Michael Parzer, Sanyukta Ghosh et autres

Decoupling charge and heat transport is essential for optimizing thermoelectric materials. Strategies to inhibit lattice-driven heat transport, however, also compromise carrier mobility, limiting the performance of most thermoelectrics, including Fe$_2$VAl Heusler compounds. Here, we demonstrate an innovative approach, which bypasses this tradeoff: …

Outstanding Room‐Temperature Thermoelectric Performance of n‐type Mg 3 Bi 2 ‐Based Compounds Through Synergistically Combined Band Engineering Approaches

Hyunyong Cho, Song Yi Back, Naoki Sato, Zihang Liu et autres

Abstract Thermoelectric cooling materials based on Bi 2 Te 3 have a long history of unsurpassed performance near room temperature. Recently, research into price‐competitive Mg 3 (Bi, Sb) 2 ‐based materials are focused on replacing traditional cooling materials. Here, the thermoelectric properties …

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Record‐High Thermoelectric Performance in Al‐Doped ZnO via Anderson Localization of Band Edge States

Illia Serhiienko, Andrei Novitskii, Fabian Garmroudi, Еvgeny Kolesnikov et autres

Abstract Oxides are of interest for thermoelectrics due to their high thermal stability, chemical inertness, low cost, and eco‐friendly constituting elements. Here, adopting a unique synthesis route via chemical co‐precipitation at strongly alkaline conditions, one of the highest thermoelectric performances for ZnO …

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STEM in situ thermal wave observations for investigating thermal diffusivity in nanoscale materials and devices

Nguyễn Duy Hiếu, Isamu Yamada, Toshiyuki Nishimura, Hong Pang et autres

Practical techniques to identify heat routes at the nanoscale are required for the thermal control of microelectronic, thermoelectric, and photonic devices. Nanoscale thermometry using various approaches has been extensively investigated, yet a reliable method has not been finalized. We developed an original …

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Multiferroic Property of 2D Hybrid Organic-Inorganic (C6H5C2H4NH3)2NiCl4 Perovskite Single Crystals

Lê Việt Cường, Nguyễn Duy Hiếu, Bui Dinh Tu, Nguyễn Huy Tiệp

Recently, two-dimensional (2D) layered organic-inorganic perovskites have been a hot topic not only in photovoltaics but also in optoelectronic applications due to their remarkable optical and electronic properties. In this study, the multiferroic property of the 2D layered (C6H5CH2CH2NH3)2NiCl4, abbreviated PEA-NiCl4, perovskite …