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Chinese Chemical Letters 2021年第8期32卷 2539-2543页

作者： Feihu Mu Benlin Dai Wei Zhao Xiaofan Yang Xiaolong Zhao Xujing Guo Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental ProtectionSchool of Chemistry and Chemical EngineeringHuaiyin Normal UniversityHuaian 223300China Department of Mechanical Engineering The University of Hong KongHong KongChina College of Resources and Environment Chengdu University of Information TechnologyChengdu 610225China

Constructing a heterojunction photocatalyst is a significant method to enhance photocatalytic activity because it can promote the separation of photogene rated ***,amorphous/crystalline contact Bi_(2)S_(3)/Bi_(4)0_(7) heterostructure was successfully synthesized by in-situ sulfidation of *** amorphous Bi_(2)S_(3) is diffused on the surface of Bi_(4)0_(7) rod,enhancing the visible light response and improving the transport of photogene rated *** characterizations confirm that the rapid separation of photogene rated carriers leads to increased photocatalytic *** optimized Bi_(2)S_(3)/Bi_(4)O_(7) heterostructure photocatalyst(BiS-0.15) exhibits the highest Cr(Ⅵ) reduction(0.01350 min^(-1)) and RhB oxidation(0.08011 min^(-1)) activity,which is much higher than that of pure Bi_(4)0_(7) and mixture under visible light *** work provides new insights into the construction of efficient novel photocatalysts.

关键词： Photocatalysis Cr(Ⅵ)reduction Heterojunction Bismuth-based oxide Bismuth-based sulfide

The Effect of Surface Ultrasonic Rolling Processing on the Rolling Contact Fatigue Performance of Valve Train Tappet Material 1

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作者： Wang, Zhijian Ma, Mengyang Jiang, Chenyang Wang, Lei Wang, Yupeng State Key Laboratory of Engine Reliability Weifang Shandong261061 China Weichai Power Co. Ltd Weifang Shandong261061 China School of Mechanical and Automotive Engineering South China University of Technology Guangzhou Guangdong510640 China

ISBN: (数字)9783030683030

ISBN: (纸本)9783030683023;9783030683054

To improve the rolling contact fatigue performance (RCFP) of a kind of tappet material GCr15 in valve train system of engine, surface ultrasonic rolling processing (SURP) with different static rolling loads (600, 800, 1000, and 1200 N) was introduced to reinforce its surface. A variety of experimental instruments were applied to study various properties including surface morphology, surface roughness, micro-hardness, surface residual stress and rolling contact fatigue of the samples. Results point out that compared with the untreated samples, the properties of the samples treated by SURP were significantly improved. With the static rolling load of 1000 N, the samples obtain the best surface quality and fatigue life. On the other hand, the samples with 1200 N gain the highest microhardness (842.3 HV0.3, which is 12.8% higher than the untreated samples) and residual compressive stress. With the static rolling load increase, the RCFP of the tappet material shows a trend of first rising and then falling, and obtain the best RCFP with the static load of 1000 N. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Microhardness

Insights into the formation of environmentally persistent free radicals during photocatalytic degradation processes of ceftriaxone sodium by ZnO/ZnIn2S4

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Chemosphere 2023年第1期314卷

作者： Yang, Jianhua Fang, Lu Li, Zhengkui Meng, Guanhua Jia, Yong Jiang, Yongbin Lian, Jianjun Gan, Xinhong Anhui University of Technology School of Energy and Environment Maanshan Anhui 243002 China State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Nanjing210023 China School of the Environment Nanjing University Nanjing210023 China Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education Maanshan Anhui 243002 China of China Nanjing210042 China

At present, the researches on photocatalysis were mainly focused on the design, improvement and development of catalysts, and less attention was paid to the existing characteristics of environmentally persistent free radicals (EPFRs) during the process of photocatalytic oxidation. In this study, A flower-like Z-type heterojunction ZnO/ZnIn2S4 (ZnO/ZIS) and typical antibiotic ceftriaxone sodium (CS) were taken as study objects, concentrating on the generation characteristics of EPFRs during the degradation of CS by ZnO/ZIS, and clarifying the degradation mechanism of CS in which EPFRs participated. The results showed that the degradation efficiency of 10 mg/L CS by 0.40 g/L ZnO/ZIS reached 85.3% in 150 min under the irradiation of 500 W xenon lamp. It was clear that ·O2− and h+ play major roles in CS degradation by ZnO/ZIS under visible light, and ·OH plays an auxiliary role. Furthermore, the formation mechanism of EPFRs during photocatalytic degradation processes of CS by ZnO/ZIS were first investigated thoroughly via experimental analysis and density functional theory (DFT) calculations. The concentration level of EPFRs centered on oxygen atoms is 1011 spin/mm3, which were generated in the process of degradation of CS by ZnO/ZIS under visible light. The production of EPFRs chiefly includes two procedures: chemical adsorption and transfer of electrons. The adsorption energy of precursor P8 on ZnIn2S4 side is −1.91 eV, the electrons transferred from precursor P8 and P11 to ZnO/ZnIn2S4 heterojunction. Surprisingly, EPFRs have little negative effects on the degradation process of CS by ZnO/ZIS. The study was not only a key field in the development of photocatalysis technology, but also a new way to study the removal mechanism of antibiotics. © 2022 Elsevier Ltd

关键词： Zinc oxide

Deciphering the role and mechanism of zero-valent iron on medium-chain fatty acid production from acetate via chain elongation in microbial electro-fermentation

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Chemical engineering Journal 2025年 515卷

作者： Qiang, Haifeng Liu, Zhihong Dong, Zhijun Li, Dengfei He, Zhangwei Liu, Wenzong Yue, Xiuping Zhou, Aijuan Department of Water Supply and Drainage Taiyuan University of Technology Taiyuan030024 China AECC Changchun Control Technology Co. Ltd Changchun130000 China Key Laboratory of Northwest Water Resource Environment and Ecology Ministry of Education Xi'an University of Architecture and Technology Xi'an710055 China School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Shenzhen518055 China

Medium-chain fatty acids represents one of the promising high-value products through chain elongation (CE) via microbial electro-fermentation (EF), while its biosynthesis is constrained by the low electron transfer efficiency. This study introduced zero-valent iron as an innovative anode material to enhance CE performance and elucidated its underlying mechanism. The EF system mediated by iron anode achieved a peak caproate concentration of 2333.9 ± 102.1 mg COD/L, manifesting a 2.8-fold increase compared with that obtained in the conventional EF system, and demonstrated the superior electrochemical performance. Microbial community analysis revealed the symbiotic interactions among caproate-synthesizing bacteria, anaerobic fermentative bacteria, electroactive bacteria, and homo-acetogens attached on the bio-cathodes. Moreover, the iron anode upregulated the functional genes encoding key enzymes in the critical metabolic pathways, including reverse β-oxidation, fatty acid biosynthesis, and electron transport. These findings may establish a theoretical basis for accelerating the production of high-value added chemicals in EF system. © 2025 Elsevier B.V.

关键词： Biosynthesis

Simulation of Hybrid Air-Cooled and Liquid-Cooled Systems for Optimal Lithium-Ion Battery Performance and Condensation Prevention in High-Humidity environments

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SSRN 2024年

作者： Zhang, Bixiao Yuan, Nenglin Kong, Benben Zou, Yitao Shi, Hong College of Energy & Power Engineering Jiangsu University of Science and Technology 2 Mengxi Jingkou Zhenjiang212003 China Key Laboratory of Aircraft environment control and life support MIIT Nanjing University of Aeronautics & Astronautics 29 Yudao Street Nanjing210016 China

This study introduces an innovative hybrid air-cooled and liquid-cooled system designed to mitigate condensation in lithium-ion battery thermal management systems (BTMS) operating in high-humidity environments. The proposed system features a unique return air structure that enhances the thermal stability and safety of the batteries by recirculating air through the battery box, thereby utilizing residual heat to prevent condensation. Computational Fluid Dynamics (CFD) simulations were employed to analyze and optimize the system's thermal management performance under various airflow velocities and temperature conditions. The study results show that compared to traditional liquid cooling systems, the proposed hybrid system reduces the condensation area by approximately 39.68% at a wind speed of 0.5 m/s, and the temperature difference decreases by 0.35 K. The integration of flow deflectors further improves the anti-condensation effect, achieving a phase change rate greater than 0 in the cooling area, thereby enabling condensation-free operation throughout the entire cooling zone. A comprehensive evaluation using the entropy weight-TOPSIS method and nonlinear surface fitting was conducted to assess multiple schemes regarding heat dissipation, anti-condensation measures, and energy consumption. The optimal operating conditions were identified as an airflow velocity (Vair) of 1.29 m/s and a liquid flow velocity (Vwater) of 0.22 m/s, resulting in a maximum temperature difference (ΔT) of 3.98 K, a maximum temperature (Tmax) of 302.36 K, and energy consumption values (Enair and Enwater) of 0.158 J and 0.192 J, respectively. The proposed system not only addresses the thermal management challenges of lithium-ion batteries in high humidity environments, but also effectively ensures the insulation safety of electronic components. It provides a reliable solution for electric vehicles and other high-efficiency thermal management applications, demonstrating significant engineering a

关键词： Cooling systems

Comparative Study on Landslide Susceptibility Mapping Based on Different Ratios of Training Samples and Testing Samples by Using Rf and Fr-Rf Models

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SSRN 2023年

作者： Xu, Ke Zhao, Zhou Chen, Wei Ma, Jianquan Liu, Fei Zhang, Yihao Ren, Zijun College of Geology and Environment Xi'an University of Science and Technology Shaanxi Xi’an710054 China Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation Xi’an University of Science and Technology Shaanxi Xi’an710054 China Shaanx i Survey and Design Institue of Water Environment Engineering Xi’an710016 China

Evaluation of landslide vulnerability is essential to planning of land and space utilization. For this purpose, the paper presents a case study from Fugu County, Shaanxi Province, China. Firstly, the geological environment and current state of landslides in Fugu County were investigated. Then, slope, aspect, terrain relief, curvature, lithology, land type, and normalized difference vegetation index (NDVI) were considered as the landslide susceptibility condition factors, and the correlation between these carried out by using Multicollinearity Analysis method. Next, landslide and non-landslide samples were divided into training samples and testing samples according to the sample ratios of 8/2, 7/3, 6/4, and 5/5, respectively. The landslide susceptibility mapping was carried out by using Random Forest (RF) model and Frequency Ratio coupled with Random Forest (FR-RF) model, respectively. Lastly, the landslide density (LD), landslide frequency ratio (LFR), the area under the curve (AUC) of the receiver operator, and other indicators were used to validate the rationality, accuracy, and performance of the landslide susceptibility maps produced from different models and ratios. The results indicated that all maps are reasonable, except the map when ratio is 5/5. For each map, regardless of ratios, the LD and LFR are the greatest in the zones classed as having a very high susceptibility, followed by those with a high, moderate, low, and very low classes. What else, from the comparison of ROC curves, when ratio is 7/3, the accuracy of the two models is higher than that of other ratios. Similarly, the results of the ensemble model (A combination of two models with different learning abilities.) are not more reasonable than the results of the single model, which reflects that the combination of a weaker learner model (Frequency Ratio model here) with a stronger learner model (Random Forest model here) can diminish the performance of the stronger model. © 2023, The Authors. All

关键词： Lithology

Straw Returning Decreases Phosphorus Loss Via Runoff from Farmland: A Global Meta-Analysis Yao Sua,B,E#, Yusef Kianpoor Kalkhajehc#, Heng Fanga,B, Hongxu Lianga,B, Xinyi Shia,B, Ruibo Suna,B, Zhi Wanga,B, Jianfei Wangd, Zhen Zhanga,B, Chao Maa,B

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SSRN 2025年

作者： Su, Yao Kalkhajeh, Yusef Kianpoor Fang, Heng Liang, Hongxu Shi, Xinyi Sun, Ruibo Wang, Zhi Wang, Jianfei Zhang, Zhen Ma, Chao Anhui Province Key Lab of Farmland Ecological Conservation and Nutrient Utilization Anhui Province Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green Phosphorus Fertilizer College of Resources and Environment Anhui Agricultural University Hefei230036 China Key Laboratory of JiangHuai Arable Land Resources Protection and Eco-restoration Ministry of Natural Resources College of Resources and Environment Anhui Agricultural University Hefei230036 China Department of Environmental Science College of Science Mathematics and Technology Wenzhou-Kean University 88 Daxue Road Ouhai Zhejiang Wenzhou325060 China College of Resource and Environment Anhui Science and Technology University Bengbu233199 China State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Xiangshan Beijing100093 China

Over-fertilization causes P accumulation in agricultural soils, leading to freshwater eutrophication. In situ straw returning (SR) can be a promising practice to control P losses and boost crop yield. However, a comprehensive assessment of the effects of SR on runoff P properties under different conditions is still lacking. Therefore, we conducted a global meta-analysis on 1039 observations to quantify the effects of SR on surface runoff P losses (SRP), TP concentration in surface runoff (TPC), and the volume of surface runoff (VSR) across diverse agricultural practices, soil, and climatic conditions. Overall, significant reductions of 37, 14.8, and 30.8% happened in straw-amended SRP, TPC, and VSR, respectively (P 2 g kg-1 and P application rate (PAR) > 120 kg ha-1, respectively (P 2 g kg-1, and PAR > 120 kg·ha-1, providing a new insight into effective control of runoff P losses from farmland soils with SR. © 2025, The Authors. All rights reserved.

关键词： Straw

Lightweighting Strategies for Optimized Thermal Energy Storage: Topology Optimization of Heat Exchanger Fins

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SSRN 2024年

作者： Wu, Chongtian Yuan, Xiaolu Yuan, Nenglin Li, Yonghao Kong, Benben Shi, Hong College of Energy & Power Engineering Jiangsu University of Science and Technology 2 Mengxi Jingkou Zhenjiang212003 China Key Laboratory of Aircraft Environment Control and Life Support MIIT Nanjing University of Aeronautics & Astronautics 29 Yudao Street Nanjing210016 China

This study introduces topology optimization (TO) to enhance the efficiency of thermal energy storage systems (TESS) by optimizing fins, addressing the low thermal conductivity of phase change materials (PCM). Fins are simplified to a "Y+T" configuration based on TO results, improving TESS performance. Additionally, the paper first incorporates the mass(m) factor into TESS optimization, emphasizing its significance in the design process. Divided into two steps for efficiency, the optimization process explores nine fin scenarios, favoring distribution optimization over increasing fin numbers. The optimal model, with three branches and θ=90°, reduces melting time and enhances efficiency compared to finless TESS. A lightweight design approach adjusts root length and width ratio, achieving efficiency gains and reducing melting time. This study introduces the mass factor and provides a rational fin configuration through TO and optimization. Named "TO Typical Structure Extraction+Parameter Sensitivity Analysis + Entropy Weighted-TOPSIS Multi-Objective Optimization," it elucidates thermal storage mechanisms, facilitating rapid optimization and offering insights for TESS fin optimization and lightweight design. © 2024, The Authors. All rights reserved.

关键词： Heat storage

Elucidating the Role of Interlayer Structure in the Permeance-Selectivity Trade-Off of Ceramic Nanofiltration Membrane

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SSRN 2023年

作者： Mo, Jiahao Li, Xianhui Yang, Zhifeng Key Laboratory for City Cluster Environmental Safety and Green Development The Ministry of Education School of Ecology Environment and Resources Guangdong University of Technology Guangzhou510006 China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological Engineering Guangdong University of Technology Guangzhou510006 China Guangzhou511458 China

Designing a rational interlayer in an asymmetric ceramic nanofiltration (NF) membrane facilitates water transport and solute retention. Nevertheless, the inherent relationship between the microstructure of interlayer and the permselectivity in ceramic NF membrane is still unclear. In this study, we developed a quantitative model to predict the influences of factors (i.e., particle diameter and layer thickness) controlling the structure of interlayer on the permselectivity by integrating the cake filtrated theory and Donnan-Steric Pore model with the Dielectric Exclusion model. The simulations demonstrated that solute rejection can be prominently affected by interlayer thickness when the top-layer structure is fixed. However, the enhancement of water permeance needs simultaneous regulation of the microstructures of both interlayer and top layer. For the negatively charged ceramic NF membranes, the combined effect of diffusion, advection, and electro-migration is the transport mechanism for positively charged counter-ion (i.e., Na+), whereas only diffusion dominates the transport of negatively charged co-ion (i.e., SO42-). We thereby elucidate the role of the interlayer on improving the permeance-selectivity tradeoff relationship, which has major implications on the future development of a high-performance ceramic NF membrane. © 2023, The Authors. All rights reserved.

关键词： Nanofiltration membranes

Efficient Path-Following for Urban Logistics: A Fuzzy Control Strategy for Consumer UAVs under Disturbance Constraints

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IEEE Transactions on Consumer Electronics 2025年

作者： Shao, Xingling Du, Jun Xia, Yi Zhang, Zekai Hou, Xiangwang Debbah, Merouane North University of China School of Electrical and Control Engineering Taiyuan030051 China State Key Laboratory of Extreme Environment Optoelecronic Dynamic Measurement Technology and Instrument Taiyuan030051 China Tsinghua University Department of Electronic Engineering Beijing100084 China Tsinghua University State Key laboratory of Space Network and Communications Beijing100084 China National University of Defense Technology College of Intelligence Science and Technology Hunan Changsha410073 China Tsinghua University Tsinghua Shenzhen International Graduate School Shenzhen518055 China Khalifa University of Science and Technology KU6G Research Center Abu Dhabi127788 United Arab Emirates

The adoption of consumer unmanned aerial vehicles (UAVs) for logistics transportation is a key aspect of the emerging low-altitude economy, yet it faces significant challenges. Urban environments introduce complex obstacles, including dense buildings and unpredictable wind disturbances, while existing control methods struggle to balance path-following accuracy, disturbance rejection, and communication efficiency. To meet these demands, this paper proposes a quantized fuzzy learning path-following control for consumer UAVs. Firstly, a hysteresis quantized fuzzy disturbance observer (HQFDO) is proposed where the disturbances are approximately estimated by a neural network. Notably, a hysteresis quantizer is employed to reduce the communication bandwidth occupation by discretizing disturbance observations. Subsequently, a distributed velocity controller and a heading angle controller are designed to tackle the geometric and dynamic tasks separately. Specifically, the velocity controller introduces a projective arc length error to mitigate inefficiencies and safety risks associated with frequent acceleration and deceleration switches. Compared to conventional techniques, the proposed approach improves transient performance, enhances path attractivity, and optimizes communication resource utilization. Theoretical stability analysis is provided, and simulations validate the effectiveness of the proposed control strategy. © 1975-2011 IEEE.

关键词： Target drones