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29th International Congress on Sound and Vibration, ICSV 2023

作者： Chen, Lin Wang, Yannan Qiao, Baijie Liu, Junjiang Cheng, Hao Chen, Xuefeng The State Key Laboratory for Manufacturing Systems Engineering Xi'an710061 China School of Mechanical Engineering Xi'an Jiaotong University Xi'an710049 China Science and Technology on Reliability and Environment Engineering Laboratory Beijing Institute of Structure and Environment Engineering Beijing100076 China

ISBN: (纸本)9788011034238

Impact force identification as a typical inverse problem is definitely a challenging task to simultaneously reconstruct and localize impact forces. While sparse solutions can be induced, the standard 1 sparse regularization tends to underestimate the amplitude of impact forces, thus it may interfere with the subsequent damage assessment of mechanical structures. With regards to this, we propose a fast non-convex(FNC) sparse regularization method that incorporates a non-convex generalized minimax-concave penalty as a regularizer and introduces an acceleration strategy to rapidly achieve the global optimum. This non-convex penalty can not only promote sparsity of the estimation, but also preserve the convexity of the cost function, so that it avoids the case of convergence to a locally optimal solution. This method is applied to solve the impact force identification problem in the underdetermined case to simultaneously reconstruct and localize impact forces. Experiments are performed on a composite fan blade to validate the FNC method in its computational efficiency and identification accuracy in terms of impact force reconstruction and localization. Results indicate that proposed FNC method converges faster and it simultaneously reconstructs and localizes impact forces with higher accuracy than the classic 1 sparse regularization method. © 2023 Proceedings of the International Congress on Sound and Vibration. All rights reserved.

关键词： Inverse problems

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The iron-based biochar activating chlorite(ClO_(2)^(−))driven by mechanochemical ultrasonic:piecewise kinetics,biomimetic catalytic-mechanism,and novel advanced redox process

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Frontiers of environmental Science & engineering 2025年第2期19卷 151-168页

作者： Qihui Xu Qianhui Yang Yuming Xie Lin Hu Zhenghao Fei Hong You School of Chemical and Environmental Engineering Yancheng Teachers UniversityYancheng 224007China State Key Laboratory of Urban Water Resources and Environment Harbin Institute of TechnologyHarbin 150090China School of Marine Science and Technology Harbin Institute of Technology at WeihaiWeihai 264209China

Chlorite(ClO_(2)^(−)or COI)is used to establish the advanced reduction and oxidation process(AROP).The iron/biochar-based particles(iron-based hydrothermal carbon with hinge-like structure,FebHCs,20 mg/L)can be utilized to activate COI(2 mmol/L)to present selective oxidation in removing triphenylmethane derivatives(15 min,90%).The protonation(H+at~102μmol/L level)played a huge role(k-2nd=0.136c-H+−0.014(R^(2)-adj=0.986),and rapp=−0.0876/c-H++1.017(R^(2)-adj=0.996))to boost the generation of the active species(e.g.,high-valent iron oxidizing species(HVI=O)and chlorine dioxide(ClO_(2))).The protonation-coupled electron transfer promoted Fe-substances in Feb/HCs activating COI(the calculated kobs ranging from 0.066−0.285 min^(−1)).The form of ClO_(2) mainly attributed to proton-coupled electron transfer(1e/1H+).The HVI=O was generated from the electron transfer within the coordination ***,carbon particles in FebHCs serve as the bridge for electron *** above roles contribute to the fracture and formation of coordination-induced bonds between Lx-FeII/III and ClO_(2)^(−)at phase interface to form *** ultrasonic(US)cavitation enhanced the mass transfer of active species in bulk solution,and the HVI=O and ClO_(2) attack unsaturated central carbon atoms of triphenylmethane derivatives to initiate selective ***,the scale-up experiment with continuous flow(k values of approximately 0.2 min^(−1),COD removal efficiency of approximately 80%)and the reactor with COMSOL simulation have also proved the applicability of the *** study offers a novel AROP and new insights into correspondingly heterogeneous interface activation mechanisms.

关键词： Chlorite Iron-based biochar Ultrasonic Chlorine dioxide High-valent iron oxidizing species

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Machine learning models coupled with ionic fragmentσ-profiles to predict ammonia solubility in ionic liquids

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Green Chemical engineering 2025年第2期6卷 223-232页

作者： Kaikai Li Yuesong Zhu Sensen Shi Yongzheng Song Haiyan Jiang Xiaochun Zhang Shaojuan Zeng Xiangping Zhang Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Mesoscience and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China College of Chemical and Engineering University of Chinese Academy of SciencesBeijing100049China College of Chemical Engineering and Environment China University of PetroleumBeijing102249China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai200237China

Emitting NH_(3)into the atmosphere leads to significant air pollution,while NH_(3)itself serves as an essential component for fertilizers and refrigerants in ***,recovering and reusing NH_(3)is highly *** liquids(ILs)have shown great potential for NH_(3)capture,where the accurate prediction of solubility is a critical point for selecting ILs and designing a separation *** work combined the Ionic Fragment Contribution(IFC)strategy with machine learning(ML)to develop four models(IFC-ML)to predict NH_(3)solubility in ILs.A dataset containing 785 solubility data points,covering 10 cations and 10 anions,was *** this dataset,the S1–S6 descriptors based on the IFC method were used as inputs for the ML models,together with temperature(T)and pressure(P).Among the models,the IFC-GBR model was recommended for predicting NH_(3)solubility in ILs due to its higher coefficient of determination(R^(2))of 0.9945 and lower mean squared error(MSE)of 0.0003 than the ***,in comparison with previous conductor-like screening model for real solvents(COSMO-RS)and extreme learning machine(ELM)methods,the IFC-GBR(gradient boosting regressor)method showed a more accurate prediction of the NH_(3)solubility in ILs over a wider range of temperatures and pressures,providing additional chemical insights into IL-NH_(3)system that cations played a more important role for NH_(3)*** results highlighted the developed IFC-GBR model offered valuable insights for helping guide the process design of absorbing NH_(3)through IL-based technology.

关键词： Ionic liquids Ionic fragments contribution NH_(3)solubility Machine learning

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Effects of high temperature and thermal cycles on fracture surface's roughness of granite:An insight on 3D morphology

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Journal of Rock Mechanics and Geotechnical engineering 2025年第2期17卷 810-826页

作者： Qixiong Gu Zhen Huang Kui Zhao Wen Zhong Li Liu Xiaozhao Li Yun Wu Ma Dan Key Laboratory of Mining Engineering of Jiangxi Province Jiangxi University of Science and TechnologyGanzhou341000China School of Resources and Environment Engineering Jiangxi University of Science and TechnologyGanzhou341000China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou221116China School of Resources and Earth Science China University of Mining and TechnologyXuzhou221116China School of Mines China University of Mining and TechnologyXuzhou221116China

The roughness of the fracture surface directly affects the strength,deformation,and permeability of the surrounding rock in deep underground *** the effect of high temperature and thermal cycle on the fracture surface roughness plays an important role in estimating the damage degree and stability of deep rock *** this paper,the variations of fracture surface roughness of granite after different heating and thermal cycles were investigated using the joint roughness coefficient method(JRC),three-dimensional(3D)roughness parameters,and fractal dimension(D),and the mechanism of damage and deterioration of granite were *** experimental results show an increase in the roughness of the granite fracture surface as temperature and cycle number were *** variations of JRC,height parameter,inclination parameter and area parameter with the temperature conformed to the Boltzmann's functional distribution,while the D decreased linearly as the temperature ***,the anisotropy index(Ip)of the granite fracture surface increased as the temperature increased,and the larger parameter values of roughness characterization at different temperatures were attained mainly in directions of 20°–40°,60°–100°and 140°–160°.The fracture aperture of granite after fracture followed the Gauss distribution and the average aperture increased with increasing temperature,which increased from 0.665 mm at 25℃to 1.058 mm at 800℃.High temperature caused an uneven thermal expansion,water evaporation,and oxidation of minerals within the granite,which promoted the growth and expansion of microfractures,and reduced interparticle bonding *** particular,the damage was exacerbated by the expansion and cracking of the quartz phase transition after T>500℃.Thermal cycles contributed to the accumulation of this damage and further weakened the interparticle bonding forces,resulting in a significant increase in the roughness,anisotropy,and aperture of the

关键词： Granite Thermal cycles High temperature Fracture surface roughness Anisotropic Thermal damage

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Propagation criterion of hydraulic fracture in rock based on the rock micro-cracking mechanism

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International Journal of Mining Science and technology 2025年第3期35卷 433-449页

作者： Qingwang Cai Bingxiang Huang Xinglong Zhao Yuekun Xing School of Resources Environment and Safety Engineering University of South ChinaHengyang 421001 China State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources China University of Mining and TechnologyXuzhou 221116 China

Hydraulic fracture(HF)formed in rock significantly helps with the development of geo-energy and *** HF formation condition was challenging to understand,with obscure rock micro-cracking mechanisms being a key *** rock micro-cracking mechanism under gradient pore water pressure was analyzed on the scale of mineral particles and it was combined with macroscopic boundary conditions of rock hydraulic fracturing,obtaining the propagation criterion of HF in rock based on the rock micro-cracking mechanism which was verified by *** results show that the disturbed skeleton stress induced by the disturbance of gradient pore water pressure in rock equals the pore water pressure *** overall range of the defined mechanical shape factor a/b is around 1,but greater *** the combined influence of pore water pressure differences and macroscopic boundary stresses on the rock micro-cracking,micro-cracks form among rock mineral particles,micro-cracks connect to form micro-hydraulic fracture surfaces,and micro-hydraulic fracture surfaces open to form macrohydraulic *** begins to form at the micro-cracking initiation pressure(MCIP),which was tested by keeping the HF tip near the initiation *** theoretical value of MCIP calculated by the proposed propagation criterion is close to MCIP tested.

关键词： Hydraulic fracture Propagation criterion Micro-cracking mechanism Pore pressure Stress singularity

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Substantial grain refinement of Al-Mn-Si alloys me diate d by collaborative effect of Al-5Ti-1B refiner and sub-rapid solidification

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Journal of Materials Science & technology 2024年第20期187卷 230-239页

作者： Yong-Si Wei Cheng Wang Jiang You Dong Qiu Yipeng Gao Hong Xu Jin Xu Hui-Yuan Wang Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Nanling CampusJilin UniversityNo.5988 Renmin StreetChangchun130025China Center for Additive Manufacturing School of EngineeringRMIT UniversityMelbourneVIC3001Australia State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Material Science and EngineeringHebei University of TechnologyTianjin300130China

The mechanical properties of as-cast metallic materials depend strongly on the size and shape of grains,which are critical microstructural parameters dictated by the interplay of nucleation and growth of crys-talline solids during *** our experiments,the microstructure transition from coarse colum-nar crystals into fine equiaxed crystals for dilute Al-Mn-Si alloys was achieved by using sub-rapid so-lidification with the addition of Al-5Ti-1B grain *** average grain size of Al alloy was reduced from a millimeter size to 73μ*** temperature gradient calculation,we found that the acqui-sition of fine equiaxed crystals could be attributed to the existence of a high number density of TiB2,acting as effective nucleation sites with an increase in total ***,the curvature su-percooling,constitutional undercooling,thermal undercooling,and kinetic undercooling during sub-rapid solidification were quantitatively determined for given solidification *** results showed that con-stitutional undercooling,rather than thermal undercooling,was primarily responsible for the formation of fine equiaxed grains,with the assistance of Al-5Ti-1B grain *** work provides a new insight into the grain refining mechanism under sub-rapid solidification.

关键词： Aluminum alloys Sub-rapid solidification Columnar-to-equiaxed transition Grain refinement

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Comparing Mn-based oxides filters started by KMnO_(4)versus K_(2)FeO_(4)for ammonium and manganese removal:Formation mechanism of active species

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Journal of environmental Sciences 2024年第11期145卷 180-192页

作者： Ya Cheng Fengkai Shi Tinglin Huang Anqi Miao Gang Wen Chunwei Wang Key Laboratory of Northwest Resource Environment and EcologyMOEXi’an University of Architecture and TechnologyXi’an 710055China Shaanxi Key Laboratory of Environmental Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province Xi’an University of Architecture and TechnologyXi’an 710055China

A pilot-scale filtration system was adopted to prepare filter media with catalytic activity to remove manganese(Mn^(2+))and ammonium(NH_(4)^(+)-N).Three different combinations of oxidants(KMnO_(4)and K_(2)FeO_(4))and reductants(MnSO_(4)and FeCl_(2))were used during the start-up *** R3 started up by KMnO_(4)and FeCl_(2)(Mn^(7+)→MnO_(x))exhibited excellent catalytic property,and the NH_(4)^(+)-N and Mn^(2+)removal efficiency reached over 80%on the 10th and 35th days,*** R1 started up by K_(2)FeO_(4)and MnSO_(4)(MnO_(x)←Mn^(2+))exhibited the worst catalytic *** R2 started up by KMnO_(4)and MnSO_(4)(Mn^(7+)→MnO_(x)←Mn^(2+))were in *** to Zeta potential results,the Mn-based oxides(MnO_(x))formed by Mn^(7+)→MnO_(x)performed the highest pHIEP and *** higher the pHIEP and pHPZC,the more unfavorable the cation ***,it was inconsistent with its excellent Mn^(2+)and NH_(4)^(+)-N removal abilities,implying that catalytic oxidation played a key *** with XRD and XPS analysis,the results showed that the MnO_(x)produced by the reduction of KMnO_(4)showed early formation of buserite crystals,high degree of amorphous,high content of Mn3+and lattice oxygen with the higher activity to form *** above results showed that MnO_(x)produced by the reduction of KMnO_(4)was more conducive to the formation of active species for catalytic oxidation of NH_(4)^(+)-N and Mn^(2+)*** study provides new insights on the formation mechanisms of the active MnO_(x)that could catalytic oxidation of NH_(4)^(+)-N and Mn^(2+).

关键词： Ammonium Manganese Mn-based oxide Filter Start-up Active species

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Simulation of a novel curved photovoltaic(PV)window improving the annual daylighting and building energy performance simultaneously

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Building Simulation 2024年第11期17卷 1951-1969页

作者： Fangfang Gong Yuan Gao Xinyi Tian Jun Wang Jie Ji Feng Shi Xiaoqiang Hong Fujian Province University Key Laboratory of Intelligent and Low-carbon Building Technology School of Architecture and Civil EngineeringXiamen UniversityXiamen361005FujianChina Fujian Key Laboratory of Digital Simulations for Coastal Civil Engineering Xiamen UniversityXiamen361005FujianChina Xiamen Key Laboratory of Integrated Application of Intelligent Technology for Architectural Heritage Protection Xiamen361005China Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei230026AnhuiChina School of Environment and Energy Engineering Anhui Jianzhu UniversityHefei230026AnhuiChina

Building integrated photovoltaic(BIPV)windows impact building performance by balancing daylighting availability,visual comfort,solar power generation,and building energy *** this balance is crucial for improving overall building energy efficiency and indoor environment *** study introduces a novel curved photovoltaic window design aimed at increasing daylight transmittance while maintaining the same photovoltaic area as a flat PV *** annual daylighting availability,visual comfort and building energy performance of three types of flat/curved PV windows(180°,120°,0°-flat)in a reference office room was comparatively studied across five different climate zones in China(Xiamen,Harbin,Nanjing,Kunming,and Beijing).The PV model was validated by the experimental *** results showed that the room with curved PV windows had significantly higher daylighting availability compared to flat windows,with the growth rates of the spatial useful daylight illuminance ranging of 3.94%–4.78%and 5.56%–5.94%,respectively,for the curved PV windows at central angles of 120°and 180°across different climate *** 120°curved PV windows achieved the lowest net energy used intensity(Net_EUI),suggesting the advantages of curved PV windows and proposed the existence of an optimal curvature for achieving the lowest Net_EUI.

关键词： BIPV curved PV PV window building performance

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Promotional effect of cobalt doping on catalytic performance of cryptomelane-type manganese oxide in toluene oxidation

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Journal of environmental Sciences 2023年第4期126卷 263-274页

作者： Ning Dong Mengyue Chen Qing Ye Dan Zhang Hongxing Dai Key Laboratory of Beijing on Regional Air Pollution Control Department of Environmental ScienceSchool of Environmental and Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China R&D Department of Atmospheric Prevention and Control Technology Guangdong Suncere Technology Co.Ltd.Guangzhou 510220China Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of Chinaand Laboratory of Catalysis Chemistry and NanoscienceDepartment of Environmental Chemical EngineeringSchool of Environmental and Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

The cryptomelane-type manganese oxide (OMS-2)-supported Co (x Co/OMS-2;x=5,10,and15 wt.%) catalysts were prepared via a pre-incorporation *** as-prepared materials were used as catalysts for catalytic oxidation of toluene (2000 ppmV).Physical and chemical properties of the catalysts were measured using the X-ray diffraction (XRD),Fourier transform infrared spectroscopic (FT-IR),scanning electron microscopic (SEM),X-ray photoelectron spectroscopy (XPS),and hydrogen temperature-programmed reduction (H_(2)-TPR)*** all of the catalysts,10Co/OMS-2 performed the best,with the T90%,specific reaction rate at 245℃,and turnover frequency at 245℃ (TOFCo) being 245℃,1.23×10^(-3)moltoluene/(gcat·sec),and 11.58×10^(-3)sec-1for toluene oxidation at a space velocity of 60,000mL/(g·hr),*** excellent catalytic performance of 10Co/OMS-2 were due to more oxygen vacancies,enhanced redox ability and oxygen mobility,and strong synergistic effect between Co species and OMS-2 ***,in the presence of poisoning gases CO_(2),SO_(2)or NH_(3),the activity of 10Co/OMS-2 decreased for the carbonate,sulfate and ammonia species covered the active sites and oxygen vacancies,*** the activation treatment,the catalytic activity was partly *** good low-temperature reducibility of 10Co/OMS-2 could also facilitate the redox process accompanied by the consecutive electron transfer between the adsorbed O_(2)and the cobalt or manganese *** the oxidation process of toluene,the benzoic and aldehydic intermediates werefirst generated,which were further oxidized to the benzoate intermediate that were eventually converted into H_(2)O and CO_(2).

关键词： Cryptomelane-type manganese oxide Cobalt doping Volatile organic compound Toluene oxidation

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Effect of crystal morphology of ultrahigh-nickel cathode materials on high temperature electrochemical stability of lithium ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 327-335,I0008页

作者： Bi Luo Hui Li Haoyu Qi Yun Liu Chuanbo Zheng Weitong Du Jiafeng Zhang Lai Chen School of Metallurgy Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600JiangsuChina National Engineering Laboratory for High-Efficiency Recovery of Refractory Nonferrous Metals School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083HunanChina School of Materials Science and Engineering Beijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Higher nickel content endows Ni-rich cathode materials LiNi_(x)Co_yMn_(1-x-y)O_(2)(x>0.6)with higher specific capacity and high energy density,which is regarded as the most promising cathode materials for Li-ion ***,the deterioration of structural stability hinders its practical application,especially under harsh working conditions such as high-temperature *** these circumstances,it becomes particularly critical to clarify the impact of the crystal morphology on the structure and high-temperature performance as for the ultrahigh-nickel ***,we conducted a comprehensive comparison in terms of microstructure,high-temperature long-cycle phase evolution,and high-temperature electrochemical stability,revealing the differences and the working mechanisms among polycrystalline(PC),single-crystalline(SC)and Al doped SC ultrahigh-nickel *** results show that the PC sample suffers a severe irreversible phase transition along with the appearance of microcracks,resulting a serious decay of both average voltage and the energy *** the Al doped SC sample exhibits superior cycling stability with intact layered ***-situ XRD and intraparticle structural evolution characterization reveal that Al doping can significantly alleviate the irreversible phase transition,thus inhibiting microcracks generation and enabling enhanced ***,it exhibits excellent cycling performance in pouch-type full-cell with a high capacity retention of 91.8%after 500 cycles at 55℃.This work promotes the fundamental understanding on the correlation between the crystalline morphology and high-temperature electrochemical stability and provides a guide for optimization the Ni-rich cathode materials.

关键词： Single-crystalline Ultrahigh-nickel cathode High-temperature performance Phase evolution

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