Cheng Zhang

Amorphization-templated nanocrystallization endows TiNi alloys with ultrahigh strength and programmable superelasticity

Qianyong Zhu, Yin Zhang, Ran Li, Cheng Zhang et autres

The concurrent achievement of high strength, ductility, and superelasticity in metals remains a grand challenge. Conventional TiNi alloys, although superelastic, suffer from low strength and modest superelasticity. Here, we report a bulk nanostructuring strategy that not only overcomes these limitations but also …

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Origin of the enhanced ductility in additively manufactured Nb40Ta25Ti15Hf15Zr5 refractory high-entropy alloy

Bo Jiao, Chunhuan Guo, Huabing Gao, Wenyao Sun et autres

cn (code pays fourni par la source)

Intrinsic edge dislocations promote high-temperature strength and ductility in additively manufactured refractory high-entropy alloys

Chunhuan Guo, Bo Jiao, Fengchun Jiang, Wei Chen et autres

Abstract Refractory high-entropy alloys (RHEAs) hold promise for applications in extreme environments. However, conventional as-cast RHEAs are constrained by the trade-off between strength and ductility, necessitating time- and energy-intensive post-processing. Here, we propose a streamlined strategy to fabricate RHEAs via laser directed …

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Engineered CAR-monocytes coordinate fibrosis clearance and cardiac regeneration following myocardial infarction

Zhenguo Wu, Xiaohan Zou, Chen Chen, Mengge Zhou et autres

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Generative Learning Enhanced Intelligent Resource Management for Cell-Free Delay Deterministic Communications

Siyan Xiong, Cheng Zhang, Wen Wang, Wenwu Yu et autres

Cell-free multiple-input multiple-output (CF-MIMO) architecture significantly enhances wireless network performance, offering a promising solution for delay-sensitive applications. This paper investigates the resource allocation problem in CF-MIMO systems, aiming to maximize energy efficiency (EE) while satisfying delay violation rate constraint. We design a …

Near-Field Wideband Channel Estimation for XL-MIMO Systems via Denoising Diffusion Model

Qingxia Feng, Yin Fang, Meng Hua, Cheng Zhang et autres

Extremely large-scale multiple-input multiple-output (XL-MIMO) is a key enabling technology for sixth-generation (6G) communication systems. Nevertheless, the increase in array aperture and signal bandwidth brings new challenges to wideband channel estimation in XL-MIMO systems. Motivated by recent advances in deep generative modeling, …

All Languages Matter: Understanding and Mitigating Language Bias in Multilingual RAG

Dan Wang, Guozhao Mo, Yafei Shi, Cheng Zhang et autres

Multilingual Retrieval-Augmented Generation (mRAG) leverages cross-lingual evidence to ground Large Language Models (LLMs) in global knowledge. However, we show that current mRAG systems suffer from a language bias during reranking, systematically favoring English and the query's native language. By introducing an estimated …

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Fusion Place Recognition with Geometric Verification

Cheng Zhang, Yuchan Yang, Yiwei Wang, Helu Zhang et autres

TiO2 decorated flower-like 2H-MoS2 heterostructure as stable noble-free substrate for sensitive and selective surface-enhanced Raman scattering analysis of Hg2+

Jinxin Chen, Cheng Zhang, Jiani Liu, Lunyan Wang et autres

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Effect of Zr Content on the Ignition Conditions and Flame Propagation of Ti100−xZrx Alloys

Xiaohui Zha, Kaikai Feng, Yang Wang, Yuchen Yang et autres

Zr is a common element in titanium alloys to enhance their mechanical properties; however, its role in combustion remains unknown. This study aimed to elucidate the effects of Zr on the ignition conditions and flame propagation of Ti100−xZrx alloys via promoted ignition-combustion …

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Thermally Stable Heterogeneous-Grained Refractory High-Entropy Alloy Offering Superior Strength from 77 to 973 K

Yaqiong An, Linze Li, Wenxuan Li, Cheng Zhang et autres

Achieving a robust strength-ductility balance across a wide temperature range remains a major challenge for refractory high-entropy alloys (RHEAs). In this study, we design a cold-workable NbTaTiHf-based RHEA with a thermally stable heterogeneous grain structure created through thermomechanical processing. This tailored microstructure …

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Study on Rub-Impact Temperature Characteristics in Rotor-Stator Systems with Thermal Barrier Coatings Based on Physics-Informed Neural Network

Kun Wang, Hongwei Xu, Yongfang Zhang, Shihui Huo et autres

In high-speed rotor–stator systems, rub-impact faults caused by rotor misalignment or vibration can generate localized high temperatures, posing serious risks to equipment safety. Thermal barrier coatings (TBCs) provide excellent thermal insulation and wear resistance, effectively protecting the system from thermal damage. However, …

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