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A novel electromagnetic wave absorption geopolymer originated from iron tailings and blast furnace slag

MATERIALS AND STRUCTURES 2025年第1期58卷 1-14页

作者： Ning, xuwen Yang, Lang Rao, Feng Wang, Tianyu Wu, Shengping huang, Hanhui Fuzhou Univ Zijin Sch Geol & Min Fuzhou 350108 Fujian Peoples R China Zhiyong Construct Grp Co Ltd Fuzhou 350800 Fujian Peoples R China Fuzhou Univ Fujian Key Lab Green Extract & High Value Utilizat Fuzhou 350108 Fujian Peoples R China State Key Lab Mineral Proc Beijing 102628 Peoples R China Fujian JiangXia Univ Sch Engn Fuzhou 350108 Fujian Peoples R China Zhongke Chengfa Fujian Construct Grp Co Ltd Nanping 354105 Fujian Peoples R China Coll Civil Engn Fujian ChuanZheng Commun Coll Fuzhou 350007 Fujian Peoples R China

In this work, a novel electromagnetic wave absorption geopolymer was created with efficient utilization of two solid wastes iron tailings and blast furnace slag, meanwhile the mechanism and impacts of iron tailings content, water-solid ratio and specimen thickness on their electromagnetic wave absorption and mechanical property were systematically investigated. It was found the pores, micro-cracks and unreacted particles in the specimens are benefitial for electromagnetic wave absorption but against to compressive strength, even though the compressive strength reaches 69.7 MPa with the iron tailings content 50% and water-solid ratio 0.4. The addition of iron tailings significantly enhances the electromagnetic wave absorption properties of the geopolymers, and increasing iron tailings content improves the number of pores, micro-cracks and the permeability of geopolymers. The electromagnetic wave absorption properties of the geopolymer initially increase and then decrease with the increase of specimen thickness and water-solid ratio. With an iron tailings content 70%, water-solid ratio 0.4 and thickness 30 mm, the effective absorption bandwidth (< -5 dB) was optimized to 10.44 GHz with a minimum reflection loss of -13.34 dB. A new mechanism for electromagnetic absorption in iron tailings has been proposed, in which the electromagnetic wave absorption of geopolymers is mainly dominated by magnetic loss and spatial propagation loss. This study provides higher competitiveness and comprehensive utilisation of iron tailings in the field of electromagnetic wave absorbing building materials, and has great potential for applications in military and other fields affected by high electromagnetic wave frequencies.

关键词： Iron tailings Geopolymers Microwave absorption Reflectivity

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Hollow-structured elastic aerogel fibers enabling simultaneous EMI shielding, infrared stealth, and thermal management

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JOURNAL OF COLLOID AND INTERFACE SCIENCE 2025年 694卷

作者： Sui, xuwen Lian, Qingsong Huo, Qiangqiang huang, Shaoliang Xue, Fuping Liang, Chaobo North Univ China Coll Mat Sci & Engn Key Lab Funct Nanocomposites Shanxi Prov Taiyuan 030051 Peoples R China

Electromagnetic interference (EMI) shielding materials that also possess thermal management capabilities are crucial for safeguarding sensitive information against interception or disruption in electronic countermeasure applications. Furthermore, these materials are adept at maintaining a stable internal temperature within their structural framework, even under the most severe cold conditions. In this work, we fabricated elastic hollow porous polyurethane (HPU) fibers incorporating silver-coated copper nanosheets (Cu@Ag NS) as fillers, which exhibit low mid-infrared emissivity and exceptional electrical conductivity. These fibers were subsequently woven into HPU textile using a shuttle weaving technique, resulting in the textile with superior EMI shielding and excellent thermal management properties. The results indicate that the HPU textile can attain an adjustable EMI shielding effectiveness (SE) ranging from 21.11 to 57.53 dB, depending on the angle between HPU textile and the electric field of the incident electromagnetic wave. The HPU textile exhibits a thermal conductivity of 0.06 Wm(-1)K(-1), offering excellent thermal insulation. Moreover, it demonstrates an elongation of 490 %, underscoring its exceptional flexibility. These outstanding EMI shielding capabilities, combined with its adaptable thermal response and superior thermal management properties, make the HPU textile highly appropriate for use in wearable devices and architectural applications.

关键词： Multifunctional polymer textile Electromagnetic interference shielding Multiple thermal response Wearable textile Joule heating

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Pilot-Scale Application of Red Mud-Based Slag Pellets in Steelmaking: Process Optimization, Mechanism, and Life Cycle Assessment

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ACS OMEGA 2025年第16期10卷 16762-16776页

作者： Qin, Yihe Yuan, Run Li, Han He, xuwen Chen, Jingjing Chen, Xingtong huang, Suran huang, Haiming Dongguan Univ Technol Sch Environm & Civil Engn Dongguan 523808 Peoples R China China Univ Min & Technol Sch Chem & Environm Engn Beijing Peoples R China

The resource utilization of red mud (RM) is crucial for the aluminum industry and for addressing environmental concerns. In this study, RM-based slag pellets were prepared through a cold pressing process and used for converter steelmaking. In the pellet preparation experiment, the effects of binder starch and carboxymethyl cellulose sodium (CMC) dosage, moisture content, drying temperature, particle size, and forming pressure on the strength of RM-based pellets were studied. The formation mechanism of RM particles was determined by analyzing the changes in the crystal structure, functional groups, elemental valence state information, and density functional theory calculations. Finally, the environmental benefits of the pellet production process were analyzed. Under the optimal reaction conditions, the compressive strength of RM pellets prepared based on starch and CMC can reach 1162.06 and 1345.6 N/P, which can meet the production needs of the converter. Mechanism analysis shows that organic adhesives adsorb and solidify particles through chemical or hydrogen bonding, resulting in a denser particle structure. RM particles have an excellent slag and phosphorus removal performance. The results of the life cycle assessment clarify the potential contributions of each stage of particle production. The raw materials and transportation distance have significant impacts on the particle production system. The experimental results provide theoretical guidance and a sustainable evaluation for the production of RM slag aggregates.

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Semi-interpenetrating network membranes based on poly(phenylene oxide) and poly(acrylonitrile-vinylimidazole) for high-temperature proton exchange membrane fuel cell applications

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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2025年 116卷 1-7页

作者： Han, Yuyang Xu, Fei huang, Kai Li, Yanting Yang, Qinwu Bao, xuwen Lin, Bencai Changzhou Univ Jiangsu Collaborat Innovat Ctr Photovolat Sci & En Sch Mat Sci & Engn Changzhou 213164 Jiangsu Peoples R China

In this study, a series of semi-interpenetrating network (semi-IPN) structure proton exchange membranes (PEMs) based on linear polyolefins and cross-linked poly(phenylene oxide) (cPPO) was fabricated for fuel cell applications. The newly synthesized membranes exhibit better flexibility and higher chemical and thermal stability than cPPO membrane owing to a semi-IPN structure. After treatment with Fenton's reagent at 80 degrees C for 240 h, all the synthesized semi-IPN membranes (cPPO-[AN-VBIm]x) show a remaining mass of >90%, indicating good oxidation stability. The proton conductivity and fuel cell performance of cPPO-[AN-VBIm](50) membranes (91 mS cm(-1) at 160 degrees C and 514 mW cm(-2) at 140 degrees C, respectively) are better than those of cPPO membranes (51 mS cm(-1) and 87 mW cm(-2), respectively under the same conditions). This study contributes significantly toward membrane research, reporting a facile and efficient method for fabricating high-performance phosphoric acid-doped membranes for high-temperature fuel cell applications that could guide future studies on efficient and practicable high-temperature PEMs.

关键词： Poly(phenylene oxide) Semi-interpenetrating network Proton exchange membrane Fuel cells Proton conductivity Phosphoric acid-doped membranes

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Research on alkali corrosion resistance and life prediction of glass fiber recycled concrete based on grey system theory

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STRUCTURES 2025年 75卷

作者： Yang, Wenrui huang, Yuewen Wu, Weiwei huang, Weihua Xiong, Xiaolong Li, Chengwei Zhong, xuwen Liu, Liai Zhou, Hai Zhang, Xun East China Univ Technol Sch Civil & Architectural Engn Nanchang 330012 Peoples R China Hong Kong Polytech Univ Dept Civil & Environm Engn Hung Hom Kowloon Hong Kong Peoples R China Univ British Columbia Sch Engn Kelowna BC V1V 1V7 Canada Jiangxi Ganyue Expressway Co Ltd Nanchang Peoples R China Power China Jiangxi Elect Power Engn Co Ltd Nanchang Peoples R China

In this paper, four kinds of recycled concrete with 0 %, 0.5 %, 1.0 %, and 1.5 % glass fiber volume ratios were prepared to investigate the alkali corrosion resistance life of glass fiber recycled concrete in an alkaline environment. The alkali solution erosion test, uniaxial compression test, and scanning electron microscope (SEM) test were carried out, respectively. The results show that glass fiber can reduce the mass loss of recycled concrete in an alkaline environment, improve its compressive strength, and prolong its alkali resistance life. When the volume ratio of glass fiber was 1.0 %, the mass loss was reduced by 0.65 %, the compressive strength was increased by 11.22 %, and the alkali corrosion life was prolonged by 40 days, up to 183 days. Based on the grey degree theory GM(1,1), the compressive strength and corrosion resistance coefficient prediction models of glass fiber recycled concrete were established. The accuracy grade of the compressive strength prediction model and the corrosion resistance coefficient prediction model were level 1 (good), indicating that the accuracy of the prediction model was good, which provided a certain theoretical basis for the research in related fields of glass fiber recycled concrete in an alkaline environment.

关键词： Recycled concrete Glass fiber Gray prediction model GM(1,1) Alkaline environment Compressive strength

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A Novel Topology Family of Single-stage Parallel Mode Uninterruptible AC/AC Converter with PFC

A Novel Topology Family of Single-stage Parallel Mode Uninte...

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International Conference on Power Electronics and Motion Control (IPEMC)

作者： Xuejun Ma Hongxia Wu Congsheng huang xuwen huang Department of Electrical Engineering Huangshi Institute of Technology China

A circuit topologies family of single-stage parallel uninterruptible AC/DC converter with high power factor is presented. The topology includes four sections, i.e. full bridge rectifier, parallel converter with power factor correction (PFC), uninterruptible power supply and fast output voltage regulation. The converter has lots of advantages such as: single stage power conversion, uninterruptible power supply, high power factor, electrical isolation between battery and AC input, fast regulation speed of the output voltage. The operational modes, control principle, and design method of key parameters are proposed. A prototype of 1 kW is designed. The performance of the proposed scheme is verified through the experimental result

关键词： Circuit topology Reactive power Uninterruptible power systems DC-DC power converters Bridge circuits Rectifiers Power factor correction Voltage control Power conversion Batteries

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NSUN3 Aggravates Sepsis-Associated Acute Kidney Injury by Stabilising TIFA mRNA Through m5C

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CLINICAL AND EXPERIMENTAL PHARMACOLOGY AND PHYSIOLOGY 2025年第4期52卷 e70026页

作者： Zhang, Chenran Shen, Wenming Zheng, xuwen Zhu, Ming Xu, Kaiqi huang, Hai Yin, Jinnan Wujin Peoples Hosp Dept Emergency Changzhou Jiangsu Peoples R China

BackgroundAcute kidney injury (AKI) is a common complication of sepsis and also a risk factor for progression of chronic kidney disease. NOP2/Sun RNA methyltransferase 3 (NSUN3) is involved in the regulation of sepsis progression. However, the mechanism by which NSUN3 regulates sepsis-associated AKI (SA-AKI) remains unclear. MethodsSA-AKI mouse model and lipopolysaccharide (LPS)-induced injury model in HK-2 cells were constructed. Haematoxylin-eosin staining, quantitative polymerase chain reaction (qPCR), western blotting, cell counting kit 8, flow cytometry, 2 ',7 '-dichlorofluorescein diacetate, enzyme-linked immunosorbent assay, methylation RNA immunoprecipitation-qPCR, actinomycin D and TdT-mediated dUTP Nick-End Labelling staining assays were utilised to explore the expression and related mechanism of NSUN3 in the SA-AKI models. ResultsThe expression of NSUN3 and tumour necrosis factor receptor-associated factor (TRAF)-interacting protein with forkhead-associated domain (TIFA) was upregulated in mice with SA-AKI and LPS-induced HK-2 cells. Knockdown of NSUN3 inhibited LPS-induced injury in HK-2 cells. Mechanically, NSUN3 increased TIFA mRNA stability and upregulated its expression through m5C modification. Moreover, knockdown of NSUN3 was found to alleviate LPS-induced HK-2 cell injury and SA-AKI in mice by reducing TIFA expression. ConclusionNSUN3 aggravates SA-AKI by stabilising TIFA mRNA through m5C, indicating that NSUN3 may be a biomarker for SA-AKI.

关键词： acute kidney injury m5C NSUN3 sepsis TIFA

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Transform Sequential Data to Image for Detecting Covert Timing Channel

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International Journal of Network Security 2024年第2期26卷 224-234页

作者： huang, xuwen Chen, Yonghong Zhuang, Xiaolong Lin, Yuwei School of Computer Science and Technology Huaqiao University China Xiamen Key Laboratory of Data Security and Blockchain Technology Huaqiao University Xiamen Fujian 361000 China

The network covert timing channel utilizes inter-packet delay to encode binary data to achieve information leakage and other purposes. In recent years, Covert Timing Channels (CTCs) have been demonstrated to be applicable across various protocols and networks, posing a significant threat to network security. Simultaneously, new CTCs have challenged the efficacy of CTC detection schemes. The recent ϵ-κlibur and ϵ-κlibur-O channels exhibit structural and characteristic similarities to legitimate channels, rendering ML-based detection methods like GAS and Snap ineffective. In this paper, we investigate an approach based on Gramian Angular Field (GAF), Markov Transition Field (MTF), and Recurrence Plot (RP) image processing. We further employ the knowledge-distilled and compressed image classification model MobileVit for detection. Our approach achieves a detection rate 98.24% for seven different channels within a sampling window of 64 IPDs. Experimental results demonstrate our proposed scheme’s generality, sensitivity, and effectiveness. © 2024, Femto Technique Co.. All rights reserved.

关键词： Distillation

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Boosting catalytic performance of N doped porous carbon derived from coal tar pitch: The role of N species and the contribution of 1O2

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JOURNAL OF WATER PROCESS ENGINEERING 2025年 72卷

作者： huang, Linlin Zhang, xuwen Wang, Lin Liu, Tingting Li, Da Sheng, Tao Sun, Caiyu Li, Lixin Heilongjiang Univ Sci & Technol Coll Environm & Chem Engn Harbin 150022 Peoples R China Harbin Inst Technol State Key Lab Urban Water Resource & Environm Harbin 150090 Peoples R China

In this study, nitrogen-doped carbon material (N-PC-d) derived from coal tar pitch using dicyandiamide as N source was successfully synthesized, exhibiting outstanding catalytic performance in the activation of peroxymonosulfate (PMS) for the degradation of Orange G (OG). By optimizing key parameters such as PMS dosage, NPC dosage, nitrogen source, pH, anions, and PS source, the optimal N-PC-d/PMS system achieved a degradation rate 1.45 times higher than that of the PC/PMS system within a broad pH range (2.0-10.0). Through electron paramagnetic resonance (EPR) and quenching experiments, it was found that singlet oxygen (1O2) was the predominant species accountable for OG degradation, while reactive oxygen species (ROS), including superoxide (O2 & sdot;-), hydroxyl radicals (& sdot;OH), and sulfate radicals (SO4 & sdot;-), played auxiliary roles. Moreover, the structure-activity relationship analysis revealed that functional groups such as C--C, C--O, and pyridine N were mainly involved in PMS activation. The degradation mechanism of OG was further elucidated by high-performance liquid chromatography-mass spectrometry (HPLC-MS). This research presented a cost-efficient N-doped porous carbon material for environmental remediation and provides more profound insights into the mechanisms of PMS activation by N doped carbon-based materials.

关键词： N-doped porous carbon Coal tar pitch PMS Singlet oxygen Orange G

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基于混沌初始化的改进郊狼算法在医学图像分割中的应用

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信息与电脑 2022年第3期34卷 65-67页

作者：黄旭文阜阳师范大学计算机与信息工程学院安徽阜阳236037

由于现有的医学图像分割方法效果不够理想,因此将混沌初始化的郊狼优化算法应用于医学图像分割中。对郊狼群参数进行混沌初始化处理,分析组内郊狼的成长情况,并评估新生郊狼的社会适应度。为了验证设计方法的有效性,进行对比实验。与模... 详细信息

由于现有的医学图像分割方法效果不够理想,因此将混沌初始化的郊狼优化算法应用于医学图像分割中。对郊狼群参数进行混沌初始化处理,分析组内郊狼的成长情况,并评估新生郊狼的社会适应度。为了验证设计方法的有效性,进行对比实验。与模糊改进的快速人工蜂群及其聚集算法(FMQABCA)、改进的模糊郊狼优化算法(FICOA)的图像分割结果相比,本文设计方法在医学图像分割方面具有更好的分割效果。

关键词：郊狼优化算法医学图像分割 Otsu Logistic混沌映射

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