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Analysis and Zonation of Freeze–Thaw Action in the Chinese Plateau Region Considering Spatiotemporal Climate Characteristics

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engineering 2024年第11期42卷 308-325页

作者： Tiejun Liu Ming Zhang Dujian Zou Jiaping Liu Jinping Ou School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Guangdong Provincial Key Laboratory of Intelligent and Resilient Structures for Civil Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China School of Materials Science and Engineering Southeast UniversityNanjing 211189China

Concerns about the durability of transportation infrastructure due to freeze-thaw(F-T)cycles are particu-larly significant in the Chinese plateau region,where concrete aging and performance deterioration pose substantial *** current national standards for the frost resistance design of concrete struc-tures are based predominantly on the coldest monthly average temperature and do not adequately address the comprehensive effects of the spatiotemporal variance,amplitude,and frequency of F-T *** address this issue,this study introduced a spatiotemporal distribution model to analyze the long-term impact of F-T action on concrete structures by employing statistical analysis and spatial inter-polation *** analysis was applied to create a nationwide zonation of F-T action level from data on the freezing temperature,temperature difference,and the number of F-T ***,this study explored the similarity between natural environmental conditions and laboratory-accelerated tests using hydraulic pressure and cumulative damage theories.A visualization platform that incorporates tools for meteorological data queries,environmental characteristic analyses,and F-T action similarity calculations was *** research lays theoretical groundwork and provides technical guidance for assessing service life and enhancing the quantitative durability design of concrete structures in the Chinese plateau region.

关键词： Concrete durability Freeze-thaw(F-T) environmental characteristics Similarity Zonation

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Cumulative damage characteristics of fully grouted GFRP bolts in rock under blasting dynamic loads

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Journal of Mountain science 2025年第5期22卷 1871-1887页

作者： WANG Wenjie SONG Jiale LIU Chao YU Longzhe KABILA Kevin School of Resources and Environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources Wuhan 430081China

In the civil and mining industries,bolts are critical components of support systems,playing a vital role in ensuring their *** fibre reinforced polymer(GFRP)bolts are widely used because they are corrosion-resistant and ***,the damage mechanisms of GFRP bolts under blasting dynamic loads are still unclear,especially compared to metal *** study investigates the cumulative damage of fully grouted GFRP bolts under blasting dynamic *** maximum axial stress at the tails of the bolts is defined as the damage variable,based on the failure characteristics of GFRP *** combining this with Miner's cumulative damage theory,a comprehensive theoretical and numerical model is established to calculate cumulative *** data collected from the Jinchuan No.3 Mining Area,including GFRP bolts parameters and blasting vibration data are used for further analysis of cumulative damage in fully grouted GFRP *** indicate that with an increasing number of blasts,axial stress increases in all parts of GFRP *** tail exhibits the most significant rise,with stress extending deeper into the anchorage *** damage follows an exponential trend with the number of blasts,although the incremental damage per blast decelerates over *** dynamic load intensities accelerate damage accumulation,leading to an exponential decline in the maximum loading cycles before ***,stronger surrounding rock and grout mitigate damage accumulation,with the effect of surrounding rock strength being more pronounced than that of *** contrast,the maximum axial stress of metal bolts increases quickly to a certain point and then *** shows a clear difference between GFRP and metal *** study presents a new cumulative damage theory that underpins the design of GFRP bolt support systems under blasting conditions,identifies key damage factors,and suggests mitigation measures to enhance system stability.

关键词： Blasting dynamic load Fully grouted GFRP bolt Cumulative damage Axial stress

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Tailoring fluorine-rich solid electrolyte interphase to boost high efficiency and long cycling stability of lithium metal batteries

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science China Chemistry 2023年第7期66卷 2121-2129页

作者： Tianyang Xue Ji Qian Xingming Guo Yi Chen Kaixin Yu Tianyang Yu Yao Li Li Li Feng Wu Renjie Chen Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Institute of Advanced Technology Beijing Institute of TechnologyJinan 250300China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Lithium metal batteries(LMBs)are regarded as the most promising next-generation battery system due to their high energy ***,Li dendrite growth and low Coulombic efficiency(CE)of Li metal anodes limit their *** solid electrolyte interphase(SEI)is an extremely effective method to solve these problems and using electrolyte additives to regulate the SEI is one of the most effective ***,we study the feasibility of trans-difluoroethylene carbonate(DFEC)used as the solvent additive in conventional ether electrolyte,which has excellent anti-reduction stability against Li *** result shows that a Li/Cu half-cell with the modified electrolyte can be steadily cycled for 300 cycles with an average CE of 97.41%at the current density of 0.5 m A cm^(-2)and with 97.1%for 140 cycles at 1 m A cm^(-2).Besides,the Li/LFP full cell with the modified electrolyte displays an improved capacity retention of 94.55%after 520 cycles with an average CE of 99.74%at 1 *** contrast,the capacity retention of 56.2%and CE of 99.15%is obtained for the cell with pure ether *** SEM images show that the DFEC enables dense Li deposition,and the FTIR and XPS spectra confirm the formation of Li Frich SEI with the *** work demonstrates the feasibility of using DFEC as the solvent additive in ether electrolyte to construct Li F-rich SEI,and it will provide important insight in developing high-performance electrolytes for LMBs.

关键词： lithium metal batteries ether electrolyte trans-difluoroethylene carbonate LiF-rich SEI dense Li deposition

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Resource utilization of typical biomass wastes as biochars in removing plasticizer diethyl phthalate from water: characterization and adsorption mechanisms

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Frontiers of environmental science & engineering 2023年第1期17卷 49-61页

作者： Mei Shi Xiao Wang Mengying Shao Lun Lu Habib Ullah Hao Zheng Fengmin Li Institute of Coastal Environmental Pollution Control College of Environmental Science and EngineeringKey Laboratory of Marine Environment and Ecology(Ministry of Education)Ocean University of ChinaQingdao 266100China State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment South China Institute of Environmental SciencesMinistry of Ecology and EnvironmentGuangzhou 510655China Department of Environmental Science Zhejiang UniversityHangzhou 310058China Marine Ecology and Environmental Science Laboratory Pilot National Laboratory for Marine Science and TechnologyQingdao 266071China Sanya Oceanographic Institution Ocean University of ChinaSanya 572000China

Plastic pollution as a global environmental issue has become a research hotspot,among which the removal of inherent plasticizer(e.g.,phthalic acid esters,PAEs)received increasing ***,the effects of biochars derived from different feedstocks on the adsorption of PAEs are poorly ***,the characteristics of biochars derived from six largely produced biomass wastes in China at 400°C,as well as their performance in adsorption of diethyl phthalate(DEP),one of frequently detected PAEs in aqueous environment,were *** results indicated that the variation in feedstock type showed significant changes in the properties(e.g.,porosity,specific surface area,surface functional groups)of biochars,which affected DEP adsorption and *** order and Freundlich models fitted the adsorption data well,and adsorption mechanisms mainly included hydrophobic effect,followed by micropore filling,hydrogen bonding,andπ-πEDA *** thermodynamics revealed that the adsorption was a spontaneous and exothermic the adsorption capacities of DEP on these biochars slightly decreased with the increasing pH but increased with the increasing ionic *** these biochars,the giant reed biochar with relatively higher DEP adsorption and low desorption exhibited the great efficiency for DEP removal as an environment-friendly *** results highlighted the significant roles of micropore filling and hydrogen bond in determining adsorption capacity of designed biochars prepared from selecting suitable agricultural straws and wetland plant waste to typical *** findings are useful for producing designed biochars from different biomass wastes for plasticizer pollution control.

关键词： Plastic pollution Phthalic acid esters Designed biochar Wetland plant Adsorption

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Rational design of Ce-doped CdS/N-rGO photocatalyst enhanced interfacial charges transfer for high effective degradation of tetracycline

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Journal of Materials science & technology 2024年第6期173卷 137-148页

作者： Huijie Wang Yang Wan Binrong Li Jian Ye Jiahao Gan Jiejing Liu Xin Liu Xianghai Song Weiqiang Zhou Xin Li Pengwei Huo Institute of Green Chemistry and Chemical Technology School of Chemistry&Chemical EngineeringJiangsu UniversityZhenjiang 212013China National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology School of Environmental Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009China Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China

The charge carrier separation efficiency and the adsorption capacity of the photocatalyst usually affect the degradation rate of ***,Cerium-doped leaf-like CdS(Ce-CdS)modified with ultrathin N-doped rGO(N-rGO)composites were successfully constructed(Ce-CdS/N-rGO)to investigate the removal efficiency of tetracycline(TC).X-ray photoelectron spectroscopy(XPS)and photoelectrochemical results revealed that Ce ions doped in CdS acting as the electron capture sites facilitated the interfacial charge *** calculation(DFT)results indicated that the interfacial effect between Ce-CdS and ultrathin N-rGO promoted the transfer of photogenerated electrons under the synergistic effect between the doping and interface modification *** optimized Ce5-CdS/N-rGO20 composites had the maximum TC removal capability(94.5%)and maintained a stable cycling *** addition,the adsorption-driven photocatalytic degradation pathway of TC was studied through mass spectrometry(MS)and in-situ Fourier transform infrared spectroscopy(in-situ FTIR).This study will provide an effective strategy for the construction of efficient photocatalytic composites for wastewater treatment.

关键词： Interfacial charges transfer Adsorption-driven photocatalytic degradation Synergistic effect Doping strategy Leaf-like CdS

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Electronic System Life Prediction Algorithm Based on the Physical of Failure

Electronic System Life Prediction Algorithm Based on the Phy...

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Prognostics and System Health Management Conference (PHM-Qingdao)

作者： Yanfang Wang Ying Chen Science and Technology on Reliability and Environmental Engineering Laboratory Beihang University Beijing China

ISBN: (数字)9798350354010

ISBN: (纸本)9798350354027

Enhancing the availability and safety of electronic systems necessitates a comprehensive investigation into their reliability. This study proposes an electronic system life prediction algorithm based on the physics of failure. For commonly used components, both failure physical models and degradation physical models are presented. An improved binary decision diagram (BDD) is constructed, accompanied by the development of a model-solving algorithm. Ultimately, the proposed methodology is applied to the driver circuit board of an electronic controller as a specific case study, thereby demonstrating its effectiveness and validity.

关键词： Degradation Accuracy Prediction algorithms Safety Logic Integrated circuit modeling Prognostics and health management Integrated circuit reliability Physics Driver circuits

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A Fault Diagnosis Method of Feature Graphical Flight Control System Based on GAF-SWT

A Fault Diagnosis Method of Feature Graphical Flight Control...

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International Conference on Guidance, Navigation and Control, ICGNC 2022

作者： Zhang, Cong Wang, Qiang Tao, Laifa Institute of Reliability Engineering Beihang University Beijing100191 China Science and Technology Laboratory on Reliability and Environmental Engineering Beihang University Beijing100191 China School of Reliability and Systems Engineering Beihang University Beijing100191 China Shenyang Aircraft Design and Research Institute Shenyang110000 China

ISBN: (纸本)9789811966125

In this paper, a GAF-SWT algorithm designed for fault diagnosis of flight control system, and a typical diagnosis program of flight control system is developed by using gradient angle field theory and Swin-Transformer classification algorithm. Among them, Gramian Angular Field can image data, completely retain data features, and maintain good generalization ability, while Swin-Transformer, as the latest image classification algorithm, has achieved remarkable results in the field of image classification and can more accurately identify flight control data visualization features. This method can extract key information from complex data quickly and accurately, and effectively solve the common fault detection in flight control system. The method is applied to the aileron actuator system. According to the signal data of an aircraft aileron actuator, 20 typical aileron control faults are tested, and the fault diagnosis accuracy is 99.6%. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Failure analysis

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New hollow nanorods of C-Na2Ti3O7 derived from MAX phase for highly efficient methylene blue removal

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Ceramics International 2025年第17期51卷 24089-24099页

作者： Xu, Yanjie Liu, Yating Zhang, Lan Gao, Yahui Wu, Chunlai Miao, Yalei Li, Na Pang, Xianjuan Dong, Feiyun Ren, Kemei Zheng, Bainan Tian, Wenjie School of Environmental Engineering and Chemistry Luoyang Institute of Science and Technology Luoyang471023 China National United Engineering Laboratory for Advanced Bearing Tribology Henan University of Science and Technology Luoyang471023 China Henan Key Laboratory of Green Building Materials Manufacturing and Intelligent Equipment Luoyang471023 China

Adsorption is one of the effective strategies to treat organic pollution in wastewater. Herein, a novel hollow nanorod of C-Na2Ti3O7 (CNTO) were fabricated from the MAX phase Ti2AlC by a facile method. The CNTO nanorods own a unique hollow structure and abundant -OH and Ti-O groups. Particularly, the as-prepared CNTO sample possesses a large specific surface area of 238.49 m2/g, which is 100 times larger than that of bulk Ti2AlC (2.11 m2/g). In MB removal, CNTO nanorods perform an excellent property with 97 % removal efficiency in 5 min and a maximal adsorption capacity of 159.1 mg/g. This ultrafast removal ability can attribute to the large specific surface area, negative zeta potential and hollow nanorod structure of CNTO samples. Kinetic experiments implied that the adsorption process conforms to the pseudo second-order kinetic model, and the adsorption form on CNTO is consistent with the Langmuir adsorption model. The mechanism studies revealed that CNTO samples adsorbed MB mainly by electrostatic adsorption and hydrogen bond adsorption. Furthermore, CNTO samples possess high structural stabilities and excellent recycling capacities in MB adsorption. This research highlights the great prospect of MAX phase derived CNTO nanorods for treating wastewater and pollutants. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Wastewater treatment

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Thermoelectric generator and temperature sensor based on polyamide doped n-type single-walled nanotubes toward self-powered wearable electronics

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材料科学技术（英文版） 2025年第4期207卷 246-254页

作者： Jiye Xiao Zhen Zhang Zhixiong Liao Jinzhen Huang Dongxia Xian Runhao Zhu Shichao Wang Chunmei Gao Lei Wang Shenzhen Key Laboratory of Polymer Science and Technology College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Fiber and Biopolymer Research Institute Department of Plant and Soil ScienceTexas Tech UniversityLubbockTX 79403USA College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Due to its ability to convert body heat into electricity,organic thermoelectric material is considered a promising and smart maintenance-free power source to charge wearable ***,develop-ing flexible n-type organic thermoelectric materials and wearable p/n junction thermoelectric devices remains *** this work,two insulated polyamides(PA6 and PA66)that have been widely used as fiber materials are employed as novel dopants for converting p-type single-walled carbon nanotubes(SWCNTs)to n-type thermoelectric *** of the electron transferability of the amide group,polyamide-doped SWCNTs exhibit excellent thermopower values as large as-56.0 μV K-1 for PA66,and-54.5 μV K-1 for *** devices with five p/n junctions connected in series are *** testing device produces a thermoelectric voltage of 43.1 mV and generates 1.85 μW thermoelectric power under temperature gradients of approximately 80 ***,they display charming capability for temperature recognition and monitoring human activities as *** promising results suggest that the flexible polyamide-doped SWCNT composites herein have high application potential as wearable thermoelectric electronics.

关键词： N-type thermoelectric material Self-powered sensors Composites Single-walled carbon nanotubes Wearable electronics

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Construction of novel g-C_(3)N_(4)/β-FeOOH Z-Scheme heterostructure photocatalyst modified with carbon quantum dots for efficient degradation of RhB

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Journal of Materials science & technology 2024年第14期181卷 11-19页

作者： Juhua Luo Xing Liu Jieliang Gu Wenjie Zhao Minming Gu Yu Xie School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China Jiangsu Provincial Key Laboratory of Eco-Environmental Materials Yancheng Institute of TechnologyYancheng 224051China College of Environment and Chemical Engineering Nanchang Hangkong UniversityNanchang 330063China

The degradation of organic pollutants using semiconductor photocatalysts is a new ecological approach,but the currently available photocatalysts are not very ***,in order to obtain efficient visible-light photocatalysts,g-C_(3)N_(4)/β-FeOOH-modified carbon quantum dots(CDs)composite photocat-alysts with Z-Scheme charge transfer mechanism were successfully *** phase composition and morphology of the composite were characterized by X-ray diffraction(XRD),scanning electron mi-croscopy(SEM),transmission electron microscopy(TEM),Fourier transform infrared spectrophotometry(FT-IR),and X-ray photoelectron spectroscopy(XPS)*** to the upconversion effect of the CDs,the optical response range of the composite was effectively widened,and the optical utilization rate was *** Z-Scheme heterostructure not only improves the light trapping ability,significantly inhibits charge-carrier complexation,and realizes the spatial separation of redox sites,but also ensures that the photocatalyst maintains a suitable valence-conductivity band position and maintains the strong redox *** addition,CDs have the unique characteristics of electronic storage and transfer,which effectively enhance the quantum separation efficiency of the *** photocatalytic efficiency was measured by degrading rhodamine B(RhB)under visible *** degradation performance was the best when the weight ratio of CDs was 6%,and the RhB solution degradation rate reached 100%in 60 *** unique structure and reliable mechanism provide a way for the development of advanced photocat-alyst.

关键词： Photocatalyst Degradation Visible light g-C_(3)N_(4) Carbon quantum dots

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