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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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金融危机对东盟各国的影响及其走出困局浅析

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东南亚纵横 2009年第2期 83-86页

作者：黄旭文上海海关学院培训部

2007年夏天爆发的美国次贷危机已演变成一场席卷全球的严重的金融风暴。这次金融危机波及范围之广、影响程度之深、冲击强度之大,为20世纪30年代大萧条以来所罕见。当前,受美国、欧元区经济衰退的影响,作为新兴经济体的东盟各国也正面... 详细信息

2007年夏天爆发的美国次贷危机已演变成一场席卷全球的严重的金融风暴。这次金融危机波及范围之广、影响程度之深、冲击强度之大,为20世纪30年代大萧条以来所罕见。当前,受美国、欧元区经济衰退的影响,作为新兴经济体的东盟各国也正面临多年来最严峻的挑战。一。

关键词：金融危机东盟市场分析发展战略

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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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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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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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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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Development and Validation of a Screening Tool for Generalized Anxiety and Major Depressive Disorder in Patients with Chronic Obstructive Pulmonary Disease

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LUNG 2025年第1期203卷 1-12页

作者： Liu, Meishan Yang, xuwen Wang, Dong Fang, Jiexin Li, Boyu An, Li Chang, Yuhan Liu, Haiman Hu, Yongdong huang, Kewu Capital Med Univ Beijing Inst Resp Med Dept Resp & Crit Care Med 8Gongti South Rd Beijing 100020 Peoples R China Capital Med Univ Beijing Chao Yang Hosp 8Gongti South Rd Beijing 100020 Peoples R China Capital Med Univ Beijing Chao Yang Hosp Dept Clin Psychol 8Gongti South Rd Beijing 100020 Peoples R China Capital Med Univ Beijing Chao Yang Hosp Dept Pharm Beijing Peoples R China

PurposeAnxiety and depression are often underdiagnosed in patients with chronic obstructive pulmonary disease (COPD). This study aimed to develop and validate a screening tool for anxiety and depression in COPD *** COPD patients were consecutively recruited from November 2021 to October 2023 and underwent a psychiatric interview to diagnose generalized anxiety disorder (GAD) and/or major depressive disorder (MDD) based on the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition. Patients were split into training and validation sets according to their recruitment time. We assessed known risk factors and used core items from the Patient Health Questionnaire Anxiety and Depression Scale (PHQ-ADS) to develop a prediction nomogram. Multivariable logistic regression with least absolute shrinkage and selection operator (LASSO) were used to construct the *** the enrolled COPD patients (n = 329), 58 (25.6%) in the training cohort and 33 (32.4%) in the validation cohort were diagnosed with GAD and/or MDD. Three variables were identified in the prediction nomogram: COPD Assessment Test score and two core items from PHQ-ADS. The under the curve (AUC) value for the nomogram was 0.826 (95% CI: 0.755-0.897) and 0.855 (95% CI: 0.767-0.942) in the training and validation cohorts, respectively. The calibration curve was close to the diagonal. The discriminatory power of the screening nomogram was comparable to that of PHQ-ADS (AUC: 0.826 vs. 0.831, P = 0.832).ConclusionThe new screening tool for GAD and MDD in COPD patients is concise and valid, with discriminatory power comparable to existing anxiety/depression screening questionnaires.

关键词： Chronic obstructive pulmonary disease Anxiety Depression Screening Nomogram

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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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Amorphous Gd55Co35M10 (M=Mn, Fe and Ni) alloys with tunable magnetic properties and large refrigerant capacity

Amorphous Gd55Co35M10 (M=Mn, Fe and Ni) alloys with tunable ...

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第十六届全国磁学和磁性材料会议暨第十七届全国微波磁学会议

作者： ZHONG XiChun huang xuwen MO HanYao SHEN XiaoYan LIU ZhongWu School of Materials Science & Engineering South China University of TechnologyGuangzhou 510640China

Gd-based amorphous compounds with wide cooling temperature span,tunable ordering temperature andnegligible magnetic or thermal hysteresis are attractive candidates for magnetic *** previous results[1] show that the refrigerant capacity (RC) value of Gd-Co-Ni amorphous alloys are much larger than those ofthe most well-known crystalline magnetic refrigeration materials,such as Gd5Si2Ge2 and La(Fe0.88Si0.12)13 *** this work,the magnetic properties and magnetocaloric effects (MCEs) of three Gd-based Gd55Co35M10(M=Mn,Fe and Ni) amorphous alloys are reported.

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SLP Approach Based Facility Layout Optimization:An Empirical Study

SLP Approach Based Facility Layout Optimization:An Empirical...

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2016管理与组织国际会议

作者： Weiying Chen Changyu Liu xuwen huang Hualiang Lai Binfeng Li College of Mathematics and Informatics South China Agricultural University Konka Group Limited by Share Ltd

Favorable facility layouts could effectively improve production efficiency, reduce production cost, and improve comprehensive competitiveness. Take the inefficient workshop facility layout of the H Company as an example, the paper studies both transportation and processing cycle for raw materials of its main products, records statistically transport distances and transport weights for each raw material in each processing workshop, and discovers principal issues in the transportation and processing cycle for the H Company. This paper adopts the Systematic Layout Planning(SLP) approach to optimize the layout design of the H Company, and compares non-optimized layout scheme with optimized one from qualitative and quantitative analysis aspect by using the analytic hierarchy process approach. The results show that the application of SLP approach in the H Company could enhance obviously the performance of its workshop facility layout.

关键词： Systematic Layout Planning(SLP) Facility Layout Optimization Empirical Study Analytic Hierarchy Process

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