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Transport characteristics and dispersion evolution of CO-NOx mixture exhaust for shuttle movement emission in short-wall continuous mining face

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environmental science and Pollution Research 2024年第51期31卷 61191-61209页

作者： Zhou, Gang Liu, Yongwei Yang, Yang Luan, Guoliang Xu, Zhuo Sun, Biao College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao266590 China State Key Laboratory of Mining Disaster Prevention and Control Co-Founded By Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao266590 China Department of Safety Engineering College of Safety and Environmental Engineering Shandong University of Science and Technology 579 Qianwangang Road Huangdao District Shandong Province Qingdao City266590 China

To investigate the evolution of CO and NOx pollution in the exhaust gas from diesel-powered shuttles under the double lane ventilation system of short-walled continuous mining face, this article uses a combination of numerical simulation and field tests to numerically simulate and analyze the pollution transport law of CO and NOx emitted from the shuttles at three locations: heading tunnel, contact alley and supporting tunnel. The results show that when the shuttle car in heading tunnel, the CO and NOx discharged from the shuttle discharge port move toward the exit of the tunnel at an average speed of 1.25 m/s. The high CO and NOx concentration area appears at the discharge port, with the highest CO volume fraction of 82.5 ppm and the highest NOx volume fraction of 28.25 ppm. When the shuttle car at the contact alley, by the two walls of the alleyway on the gas diffusion space extrusion effect, CO and NOx in X = 37.5 m ~ 42.5 m range gathered, appear high CO and NOx concentration band. When the shuttle car in supporting tunnel, it is hindered by the belt conveyor within the range of X = 63 m ~ 64.5 m, so CO and NOx fail to spread to the outlet of the roadway in time and pile up at the bottom of the roadway. The highest CO volume fraction is 76.25 ppm and the highest NOx volume fraction is 28.28 *** to the different positions of the car, the pollution areas of CO and NOx exceeding the specified threshold (24 ppm, 2.5 ppm) were divided, and the distribution characteristics of CO and NOx pollution were obtained by quantitative analysis through curve fitting, which provided a theoretical basis for the prevention and control of harmful substances emitted by fuel power equipment in underground environment. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Belt conveyors

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Fault Diagnosis of Hydraulic Systems with Missing Data Based on FGCN: A Data Augmentation Approach

Fault Diagnosis of Hydraulic Systems with Missing Data Based...

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International Conference on Guidance, Navigation and Control, ICGNC 2022

作者： Zhao, Zhengduo Ma, Liang Liu, Jia Su, Xuanyuan 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 The Fifth Electronic Research Institute of Ministry of Industry and Information Technology Guangzhou511370 China

ISBN: (纸本)9789811966125

Due to the harsh working condition, effective fault diagnosis of aircrafts’ hydraulic systems is necessary to ensure their safety and reliability. In the ideal scenarios with rich failure data, deep learning (DL)-based methods generally achieve the satisfied fault diagnosis thanks to their remarkable capability of adaptive feature learning. However, the problem of missing data is quite common for the practical hydraulic systems, which means that it is hard to collect the sufficient failure samples to training these deep models. It thus severely limits their applications in practices. Aiming at the missing data problem of hydraulic systems, this paper provides a novel two-stage model named frequency-domain generative adversarial convolution neural networks (FGCN), to improve their fault diagnosis ability under the limited failure samples. In the first stage, a unique generative adversarial block is designed to generate the high-quality data considering characteristics of signals’ frequency domain. In the second stage, with the help of the augmented failure samples, the convolution block is fully trained to capture the intrinsic representations of hydraulic systems. The proposed method is validated by the dataset of real hydraulic pumps with missing data. The experimental results show that our proposed method based on FGCN improve the diagnostic accuracy by 13% compared with the mainstream DL-based ones, which reveal its superior performance for the fault diagnosis limited by the missing data. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Failure analysis

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Novel quantitative structure activity relationship models for predicting hexadecane/air partition coefficients of organic compounds

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Journal of environmental sciences 2023年第2期124卷 98-104页

作者： Ya Wang Weihao Tang Zijun Xiao Wenhao Yang Yue Peng Jingwen Chen Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Key Laboratory of Industrial Ecology and Environmental Engineering(MOE) School of Environmental Science and TechnologyDalian University of TechnologyLinggong Road 2Dalian 116024China

Predicting the logarithm of hexadecane/air partition coefficient(L)for organic compounds is crucial for understanding the environmental behavior and fate of organic compounds and developing prediction models with polyparameter linear free energy ***,two quantitative structure activity relationship(QSAR)models were developed with 1272 L values for the organic compounds by using multiple linear regression(MLR)and support vector machine(SVM)*** the basis of the OECD principles,the goodness of fit,robustness and predictive ability for the developed models were *** SVM model was first developed,and the predictive capability for the SVM model is slightly better than that for the MLR *** applicability domain(AD)of these two models has been extended to include more kinds of emerging pollutants,i.e.,oraganosilicon *** developed QSAR models can be used for predicting L values of various organic *** van derWaals interactions between the organic compound and the hexadecane have a significant effect on the L value of the *** in silico models developed in current study can provide an alternative to experimental method for high-throughput obtaining L values of organic compounds.

关键词： L value Quantitative structure-activity relationship Multiple linear regression Support vector machine Oraganosilicon compounds

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Fe doping 1T phase MoS_(2)with enhanced zinc-ion storage ability and durability for high-performance aqueous zinc-ion batteries

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Rare Metals 2025年第1期44卷 253-263页

作者： Jing-Yi Liu Rong-Jie Zhe Zhan-Hong Peng Yi-Hui Song Lin-Xuan Yang Chen Qing Jun-Ling Guo Jin-Ping Liu Yunnan Key Laboratory of Opto-Electronic Information Technology College of Physics and Electronic Information TechnologyYunnan Normal UniversityKunming 650000China Country State Center for International Cooperation on Designer Low-Carbon and Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China School of Chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China

As a promising cathode material for aqueous zinc-ion batteries,1T-MoS_(2)has been extensively investigated because of its facile two-dimensional ion-diffusion channels and high electrical ***,the limited number of available Zn storage sites,i.e.,limited capacity,hinders its application because the inserted Zn^(2+),which form strong electrostatic interactions with 1T-MoS_(2),preventing subsequent Zn^(2+)***,the approach of enlarging the interlayer distance to reduce electrostatic interactions has been commonly used to enhance the capacity and reduce Zn^(2+)migration ***,an enlarged interlayer spacing can weaken the van der Waals force between 1T-MoS_(2)monolayers,easily disrupting the structural ***,to address this issue,an effective strategy based on Fe doping is proposed for 1T-MoS_(2)(Fe-1T-MoS_(2)).The theoretical calculations reveal that Fe doping can simultaneously moderate the rate of decrease in the adsorption energy after gradually increasing the number of stored atoms,and enhance the electron delocalization on metal-O ***,the experiment results show that Fe doping can simultaneously activate more Zn storage sites,thus enhancing the capacity,and stabilize the structural stability for improved cycling ***,Fe-1T-MoS_(2)exhibits a larger capacity(189 mAh·g^(-1)at 0.1 A·g^(-1))and superior cycling stability(78%capacity retention after 400 cycles at 2 A·g^(-1))than pure 1T-MoS_(2).This work may open up a new avenue for constructing high-performance MoS_(2)-based cathodes.

关键词： Aqueous zinc-ion battery 1T-MoS_(2) Fe doping More Zn storage sites Enhanced structural stability

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The impact of Cu content on crystallization kinetics and soft magnetic properties for ductility FePCCu amorphous alloy

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Progress in Natural science: Materials International 2025年第3期35卷 560-567页

作者： Jiang, Xiangxiang Liu, Cong Luo, Hongzhi Ding, Jing Zuo, Mingqing Yang, Chen Dai, Xuefang Zhu, Shengli Liu, Guodong State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Materials Science and Engineering Hebei University of Technology Tianjin300130 China School of Energy and Machinery Dezhou University Dezhou253023 China College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan University Hunan Changsha410082 China School of Materials Science and Engineering Tianjin University Tianjin30072 China School of Materials Science and Engineering Lanzhou Jiaotong University Lanzhou730070 China

Effects of trace addition of Cu in ductility Fe83−xP11C6Cux (x = 0.7–1 at. %) amorphous alloys on the crystallization kinetics, soft magnetic properties and hardness were investigated. With Cu content increasing, the Curie temperature (Tc) and initial crystallization onset temperature (Tx1) increase at first and then drop. The nucleation process becomes hard with the increasing of Cu content, and it is more difficult than growth process. The Fe82.3P11C6Cu0.7 amorphous ribbon demonstrates high saturation magnetization (Bs) of 1.63 T, low coercivity (Hc) of 5.2 A/m, and high initial permeability (μi) of 15,000, alongside Vickers hardness (Hv) exceeding 760 and excellent bending ductility. Annealing-induced [amorphous + α-Fe] phase in Fe82.3P11C6Cu0.7 has good soft magnetic properties, with Bs of 1.66 T, Hc of 9.7 A/m, μi of 16,000, and Hv over 1300. Notably, only nanocrystalline α-Fe phase precipitation is observed in its ribbon after annealing at Tx2-50 K (Tx2, second crystallization onset temperature). At the same time the sample has good flexibility. Fe-based amorphous/nanocrystalline alloys can be as promising option for commercial applications because of their remarkable soft magnetic properties, cost-effectiveness, and exceptional bending ductility. © 2025 Chinese Materials Research Society

关键词： Ductility

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Initiating High-Voltage Multielectron Reactions in NASICON Cathodes for Aqueous Zinc/Sodium Batteries

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Energy Material Advances 2023年第1期4卷 426-437页

作者： Jiasheng Yue Shuqiang Li Shi Chen Jingjing Yang Xueying Lu Yu Li Ran Zhao Chuan Wu Ying Bai Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081PR China Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019PR China

Sodium superionic conductor(NASICON)is a class of compounds with robust polyanionic frameworks and high thermal stability,which are regarded as prospective cathodes candidates for secondary ***,NASICON cathodes typically have low discharge plateaus and low practical capacities in aqueous ***,Na_(3)V_(1.75)Fe_(0.25)(PO_(4))_(2)F_(3) is investigated as a cathode material for the aqueous zinc/sodium *** the addition of F helps with the improvement of NASICON structural stability,the low-cost Fe substitution has a positive impact on the capacity increment,reaction voltage increases,and cycling stability *** the Fe^(3+)substitution could induce a change in the spin magnetic moments of the 3d orbitals of the VO_(4)F_(2) and FeO_(4)F_(2) octahedra,the 2-electron reaction of V is activated,which are V^(4+)/V^(3+)and V^(5+)/V^(4+)redox *** a result,the novel Na_(3)V_(1.75)Fe_(0.25)(PO_(4))_(2)F_(3) cathode delivers a high operating voltage of 1.7 V,a high energy density of 209 W·h·kg^(−1) and stable lifespan(83.5%capacity retention after 6,000 cycles at 1 A·g^(−1))in the aqueous zinc/sodium *** research demonstrates the practicality of activating multielectron reactions to optimize the electrochemical properties of NASICON cathodes for aqueous secondary batteries.

关键词： stability substitution increment

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An effective strategy of constructing multi-metallic oxides of ZnO/ CoNiO_(2)/CoO/C microflowers for improved supercapacitive performance

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Chinese Journal of Chemical engineering 2024年第3期67卷 1-8页

作者： Wei Guo Yan Zhang Xiaxin Lei Shuang Wang College of Physics Taiyuan University of TechnologyJinzhong 030600China College of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan University of TechnologyTaiyuan 030024China

In this work,a new ZnO/CoNiO_(2)/CoO/C metal oxides composite is prepared by cost-effective hydrothermal method coupled with annealing process under N_(2) ***,the oxidation-defect annealing environment is conducive to both morphology and component of the composite,which flower-like ZnO/CoNiO_(2)/CoO/C is *** from good chemical stability of ZnO,high energy capacity of CoNiO_(2) and CoO and good conductivity of C,the as-prepared sample shows promising electrochemical behavior,including the specific capacity of 1435 C·g^(-1) at 1 A·g^(-1),capacity retention of 87.3%at 20 A·g^(-1),and cycling stability of 90.5%for 3000 cycles at 5 A·g^(-1),***,the prepared ZnO/CoNiO_(2)/CoO/C/NF//AC aqueous hybrid supercapacitors device delivers the best specific energy of 55.9 W·h·kg^(-1) at 850 W·kg^(-1).The results reflect that the as-prepared ZnO/CoNiO_(2)/CoO/C microflowers are considered as high performance electrode materials for supercapacitor,and the strategy mentioned in this paper is benefit to prepare mixed metal oxides composite for energy conversion and storage.

关键词： Composites Electrochemistry Hydrothermal Transition metal oxides Structural control Supercapacitors

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Typhoon-Induced Ocean Waves and Stokes Drift:A Case Study of Typhoon Mangkhut(2018)

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China Ocean engineering 2024年第4期38卷 711-724页

作者： WU Zhi-yuan GAO Kai CHEN Jie ZHANG Hao-jian DENG Bin JIANG Chang-bo LIU Yi-zhuang LYU Zhao YAN Ren School of Hydraulic and Environmental Engineering Changsha University of Science&TechnologyChangsha 410114China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210024China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China School of Civil Engineering Hunan University of TechnologyZhuzhou 412007China

Ocean waves and Stokes drift are generated by *** study investigated the characteristics of ocean waves and wave-induced Stokes drift and their effects during Typhoon Mangkhut using European Centre for MediumRange Weather Forecasts(ECMWF)ERA5 datasets and observational *** results revealed that the typhoon generated intense cyclones and huge typhoon waves with a maximum wind speed of 45 m/s,a minimum pressure of955 h Pa,and a maximum significant wave height of 12 *** Stokes drift caused by typhoon waves exceeded 0.6m/s,the Stokes depth scale exceeded 18 m,and the maximum Stokes transport reached 6 m^(2)/*** spatial distribution of 10-m wind speed,typhoon wave height,Stokes drift,Stokes depth,and Stokes transport during the typhoon was highly correlated with the typhoon *** distribution along the typhoon track showed significant zonal asymmetry,with greater intensity on the right side of the typhoon track than on the left *** findings provide important insights into the impact of typhoons on ocean waves and Stokes drift,thus improving our understanding of the interactions between typhoons and the ocean *** study also investigated the contribution of Stokes transport to the total net transport during typhoons using Ekman-Stokes Numbers as a comparative *** results indicated that the ratio of Stokes transport to the total net transport reached up to 50%within the typhoon radius,while it was approximately 30%outside the *** Stokes transport induced by typhoon waves led to divergence in the transport direction,which resulted in upwelling of the lower ocean as a compensation ***,Stokes transport played a crucial role in the vertical mixing of the ocean during *** findings suggested that Stokes transport should be paid more attention to,particularly in high latitude ocean regions,where strong winds can amplify its effects.

关键词： Stokes drift typhoon waves Ekman-Stokes transport vertical mixing Typhoon Mangkhut

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Diminishing ether-oxygen content of electrolytes enables temperature-immune lithium metal batteries

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science China Chemistry 2023年第9期66卷 2700-2710页

作者： Tao Liu Jingnan Feng Zhe Shi Huajun Li Weina Zhao Minglei Mao Xiangzhen Zhu Yong-Sheng Hu Hong Li Xuejie Huang Liquan Chen Liumin Suo Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Department of Nuclear Science and Engineering and Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China

The reversibility of lithium(Li) metal anodes is highly susceptible to temperature,owing to the aggravated side reactions at high temperatures and serious Li dendrite growth at low *** it is extremely challenging to simultaneously realize the high Li reversibility in both low and high temperature ***,an oxygen-free solvent(n-hexane,HEX) assisted with the hexyl methyl ether and 1 mol L^(-1)lithium bis(fluorosulfonyl)imide is proposed to constitute an electrolyte for temperatureimmune lithium metal *** demonstrates that the HEX not only greatly suppresses the solvent reduction even at high temperatures but also weaken the Li~+-solvent interaction for the facile Li-ion desolvation,leading to high Li Coulombic efficiencies(99.59% at 25℃,99.30%at 60℃ and 98.75% at -30℃) and the dendrite-free Li plating from -30℃ to 60℃.Benefitting from the low density and temperature-immune properties of our electrolyte,the sulfurized polyacrylonitrile(3.8mAh cm^(-2))||Li(60 μm) pouch-cells deliver 278 Wh kg^(-1)energy density and maintain the stable performance over 50 cycles,and retain 248 and 320 Wh kg^(-1) energy density at -30℃ and 60℃,*** work provides a new perspective on the electrolyte design for wide-temperature Li metal batteries.

关键词： wide temperature range oxygen-free solvent dendrite-free Li plating high Coulombic efficiencies lithium metal batteries

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Li-promoted C_(3)N_(4) catalyst for efficient isomerization of glucose into fructose at 50℃ in water

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Green Energy & Environment 2024年第9期9卷 1419-1426页

作者： Wang Liu Yanfei Zhang Mengya Sun Xinpeng Zhao Shenggang Li Xinqing Chen Liangshu Zhong Lingzhao Kong CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201210China University of Chinese Academy of Sciences Beijing100049China School of Physical Science and Technology Shanghai Tech UniversityShanghai201203China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhouJiangsu215009China

Efficient and selective glucose-to-fructose isomerization is a crucial step for production of oxygenated chemicals derived from sugars,which is usually catalyzed by base or Lewis acid heterogeneous ***,high yield and selectivity of fructose cannot be simultaneously obtained under mild conditions which hamper the scale of application compared with enzymatic ***,a Li-promoted C_(3)N_(4) catalyst was exploited which afforded an excellent fructose yield(40.3 wt%)and selectivity(99.5%)from glucose in water at 50℃,attributed to the formation of stable Li–N bond to strengthen the basic sites of ***,the so-formed N_(6)–Li–H_(2)O active site on Li–C_(3)N_(4) catalyst in aqueous phase changes the local electronic structure and strengthens the deprotonation process during glucose isomerization into *** superior catalytic performance which is comparable to biological pathway suggests promising applications of lithium containing heterogeneous catalyst in biomass refinery.

关键词： Glucose Fructose Isomerization Li–C_(3)N_(4) Density functional theory calculations

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