Pingping He

Data-driven inverse design of strain-hardening cementitious composites (SHCC): Integrating multi-fiber systems, ANN modeling, and PSO optimization

Yusong Liu, Xin Yu, Chen Chen, Pingping He et autres

To address the limited tunability, experience-dependent mix design, and lack of systematic inverse design approaches in multi-performance-oriented SHCC design, this study proposes a target-performance-driven inverse design method based on machine learning and heuristic optimization to achieve wide-range performance design of SHCC. Unlike …

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Effects of Gold Tailings Fineness and Dosage on the Rheology and Mechanical Properties of ECC

Haosheng Yu, Xin Yu, Pingping He, Lin Fan

This study systematically investigates the effects of gold tailings (GT) sand substitution levels and particle fineness on the rheological behavior, mechanical properties, and microstructural characteristics of Engineered Cementitious Composites (ECC). The results demonstrate that incorporating moderate amounts of GT sand (≤75%) effectively …

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Mechanical Properties of EGC Incorporating Ternary Precursors

Pingping He, Long Wang, Xin Yu, Yusong Liu et autres

This study investigates the composition–property relationships in ternary engineered geopolymer composites (EGCs) using a simplex centroid design method to optimize the synergy between ground granulated blast furnace slag (GGBS), fly ash (FA), and metakaolin (MK). Mechanical testing revealed that compressive strength (>85 …

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Synergistic mechanism of polycarboxylate superplasticizer and hydroxypropyl methyl cellulose on fiber dispersion and mechanical properties of PVA-fiber concrete: experimental and simulation studies

Lín Fan, Xin Yu, Chen Chen, Pingping He

PCEs and HPMC are vital to PVA-FRC, where imbalance causes bleeding and viscosity issues, affecting fiber distribution and performance. This study investigates the synergistic mechanisms of PCEs and HPMC on fiber dispersion and mechanical properties through macroscopic experiments and microscopic simulations. Experimental …

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An overview on polymorphs of calcium carbonate formed during carbon mineralization of cementitious materials

Zhiqiang Xiao, Jian Zhang, Xiang Hu, Amani Khaskhoussi et autres

Carbon mineralization presents a promising pathway for reducing the carbon footprint within the cement industry. However, the performance of carbonated cementitious materials is closely tied to the polymorphs of calcium carbonate. This paper examines the factors and strategies governing the formation of …

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Proton‐Mediated Dynamic Nestling of DNA Payloads Within Size‐Matched MOFs Nanochannels for Smart Intracellular Delivery

Xiaowen Wang, Hong Zhang, Pingping He, Xiaoxue Du et autres

With sequence-programmable biological functions and excellent biocompatibility, synthetic functional DNA holds great promise for various biological applications. However, it remains a challenge to simultaneously retain their biological functions while protecting these fragile oligonucleotides from the degradation by nucleases abundant in biological circumstances. …

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Research on thermal characteristics of double-nut ball screw

Pingping He

Abstract Preload, external load, and feed speed have significant effects on thermal characteristics of ball screws. In this paper, ground on friction heat generation theory and Hertz contact theory, a thermodynamic modeling of the double-nut ball screw is established, heat generation under …

Exploring the environmental influences and community assembly processes of bacterioplankton in a subtropical coastal system: Insights from the Beibu Gulf in China

Jinxia Peng, Dapeng Wang, Pingping He, Pinyuan Wei et autres

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Properties of CO2-cured cement incorporating fly ash and slag subjected to further water curing

Pingping He, Sarra Drissi, Xiang Hu, Jianhui Liu et autres

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Stimuli-responsive Ti 3 C 2 T x MXene-based hydrogels: preparation and applications

Qi Gao, Pingping He, Xiaowen Wang, Xiaoxue Du et autres

MXene-based stimuli-responsive hydrogels have emerged as a new class of smart soft materials and have shown great potential in various applications such as sensing, biomedicine, actuators and energy-related applications.

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Methods for assessing carbon dioxide absorbed by cementitious materials

Yuguang Mao, Pingping He, Caijun Shi

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Dual stimuli-responsive upconversion nanoparticle–poly- N -isopropylacrylamide/DNA core–shell microgels

Qi Gao, Xiaowen Wang, Shanjin Hu, Pingping He et autres

-isopropylacrylamide (pNIPAM)/DNA core-shell microgels with tunable sizes and programmable functions have been prepared. Thanks to the near-infrared (NIR)-responsive UCNP cores and thermosensitive polymeric shells, functional DNA-incorporated microgels with high DNA activity and loading efficiency are obtained, and the activity of the loaded …

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