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Research on Influencing Factors of Front Windshield Collision simulation Accuracy 1

2022中国汽车工程学会年会暨展览会

作者： Zhu Xuewu Feng Yue Wang Shibin Ma Boshuai Ji Longbo FAW Group Co. Ltd.General Institute of FAW State Key Laboratory of Comprehensive Technology on Automobile Vibration and Noise & Safety Control

ISBN: (数字)9789819913657

ISBN: (纸本)9789819913640;9789819913671

Based on the requirement of improving the simulation accuracy of pedestrian protection of automobile windshield glass,the influencing factors of the simulation accuracy of the front windshield are studied from three aspects:impact position,material parameters,and modeling *** following conclusions are drawn:(1) The closer the distance between the impact point and the interior instrument panel and the black belt boundary,the greater the head damage value;(2) The greater the glass yield stress,the larger the initial peak value of the damage *** reduction of the glass plastic hardening modulus,glass failure plastic strain,interlayer Young's modulus,interlayer yield stress,interlayer plastic hardening modulus will reduce the valley value after the first peak to a certain degree;(3) The rigid connection method of the fixed point of the instrument panel will lead to a larger secondary peak of the damage curve,and the head damage is too *** the same time,it is recommended to use the method of taking the impact point as the center and radiating to the surrounding for glass meshing,which can effectively simulate the cobweb-like breaking form in the glass impact test and improve the simulation accuracy.

关键词： front windshield pedestrian protection simulation accuracy

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The Premise of Automatic Four-wheel Alignment: Intelligent Identification and Processing of Rim Targets

The Premise of Automatic Four-wheel Alignment: Intelligent I...

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2021 International Conference on Robotics Automation and Intelligent control, ICRAIC 2021

作者： Wang, Yifan Yao, Meibao State Key Laboratory of Automotive Simulation and Control Jilin University Jilin Changchun China School of artificial intelligence Jilin University Jilin Changchun China

With high demand of automatic development of four-wheel alignment technology, this paper explores the core technology of automatic detection of four-wheel alignment instrument: intelligent identification and processing of rim target. According to the working process of 3D vision four-wheel aligner, starting from the target positioning, this paper proposes a method based on matching idea to realize the target recognition and positioning;Then the target area image is segmented to obtain the center coordinates on it, which provides a basis for the subsequent calculation of four-wheel positioning parameters. simulation results demonstrate the effectiveness of our method. © 2022 Institute of Physics Publishing. All rights reserved.

关键词： Wheels

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Delocalization state-Induced C-O Bond Weakness for Enhancing CO2 Electroreduction to Co

SSRN

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SSRN 2024年

作者： Wang, Rong Peng, Yue Chen, Deli Gao, Chuan Wang, Houlin Chen, Zhen Li, Junhua State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Manufacturing E-fuels through carbon capture utilization and storage (CCUS), powered by renewable energy conversion, presents a promising pathway towards near-zero emissions for achieving carbon neutrality. However, challenges arise from lower CO selectivity and slower generation rates, leading to suboptimal E-fuels yield and hindering the effective utilization of renewable energy. Drawing inspiration from the hard-soft-based theory, we propose that enhancing the electron delocalization state of catalytic sites can accelerate the CO2 electroreduction to CO. In line with this hypothesis, we have developed a bimetallic catalyst (Ag-Zn) where Ag nanoclusters loaded on ZnO exhibit highly delocalized electrons. Theoretical calculations indicate that Ag-ZnO significantly expedites the hydroxyl detachment of the adsorbed *COOH intermediate, enhancing the efficiency of CO formation. The Ag-ZnO catalyst demonstrates one of the highest CO2-electroreduction-to-CO selectivity (97%) in aqueous electrolyte. Furthermore, our investigation delves into the significance of soft acid sites through in situ X-ray adsorption spectroscopy, in situ Raman spectroscopy and asymmetric low-frequency pulsed strategy. The findings from this study offer theoretical insights guiding the design of catalysts for the efficient electrochemical reduction of CO2 to produce CO. © 2024, The Authors. All rights reserved.

关键词： Electrolytic reduction

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Transformation of dissolved organic matter during groundwater arsenite removal using air cathode iron electrocoagulation

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Chemosphere 2024年 358卷 142083页

作者： Yuan, Ying Chen, Jiabao Zhang, Hao Wu, Yue Xiao, Yu Huang, Wan Wang, Yang Tang, Jun Zhang, Fang State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing100012 China School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing100084 China College of Environmental Science and Engineering Guilin University of Technology Guilin541004 China

Dissolve organic matters (DOM) usually showed negative effect on the removal of inorganic arsenic (As) in groundwater by electrochemical approaches, yet which parts of sub-component within DOM played the role was lack of evidence. Herein, we investigated the effects of land-source humic-like acid (HA) on groundwater As(III) removal using air cathode iron electrocoagulation, based on the parallel factor analysis of three-dimensional excitation–emission matrix and statistical methods. Our results showed that the land-source HA contained five kinds of components and all components presented significantly negative correlations with the removal of both As(III) and As(V). However, the high aromatic fulvic-like acid and low aromatic humic-like acid components of land-source HA presented the opposite correlations with the concentration of As(III) during the reaction. The high aromaticity fulvic-like components of land-source HA (Sigma-Aldrich HA, SAHA) produced during the reaction facilitated the oxidation of As(III) due to its high electron transfer capacities and good solubility in wide pH range, but the low aromaticity humic-like ones worked against the oxidation of As(III). Our findings offered the novel insights for the flexible activities of DOM in electron Fenton system. © 2024 Elsevier Ltd

关键词： Groundwater

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Enhancing Autonomy Capability in Regional Power Grids:A Strategic Planning Approach with Multiple Autonomous Evaluation Indexes

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Energy Engineering 2024年第9期121卷 2449-2477页

作者： Jie Ma Tong Zhao Yuanzhao Hao Wenwen Qin Haozheng Yu Mingxuan Du Yuanhong Liu Liang Zhang Shixia Mu Cuiping Li Junhui Li Planning and Assessment Center Department State Grid Henan Economic Research InstituteZhengzhou450000China Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of EducationNortheast Electric Power UniversityJilin132012China Development Planning Department State Grid Henan Electric Power CompanyZhengzhou450000China Innovation Development Research Center State Grid Shanghai Energy Internet Research Institute Co.Ltd.Shanghai201210China State Grid Simulation Center China Electric Power Research Institute Co.Ltd.Beijing100192China

After the integration of large-scale DistributedGeneration(DG)into the distribution network,the randomness and volatility of its output result in a reduction of spatiotemporal alignment between power generation and demand in the distribution network,exacerbating the phenomenon of wind and solar power *** a novel power system model,the fundamental concept of Regional Autonomous Power Grids(RAPGs)is to achieve localized management and energy autonomy,thereby facilitating the effective consumption of ***,this paper proposes a distributed resource planning strategy that enhances the autonomy capabilities of regional power grids by considering multiple evaluation indexes for ***,a regional Energy Storage(ES)configuration strategy is *** strategy can select a suitable reference value for the upper limit of ES configuration based on the regional load andDGoutput to maximize the elimination of source load deviations in the region as the upper limit constraint of ES ***,a control strategy for regional ES is proposed,the charging and discharging reference line of ES is set,and multiple autonomy and economic indexes are used as objective functions to select different proportions of ES to control the distributed resources of the regional power grid and establish evaluation indexes of the internal regional generation and load power ratio,the proportion of power supply matching hours,new energy consumption rate and tie line power imbalance outside the region to evaluate changes in the regional autonomy *** final simulation results showthat in the real regional grid example,the planning method in the planning year in the region of the overall power supply matching hour ratio and new energy consumption rate increased by 3.9%and 4.8%on average,and the power imbalance of the tie line decreased by 7.8%on *** proposed planning approach enables the maximization of regional autonomy while effectively smoothing the fluct

关键词： Regional autonomous power grid distributed generation distributed energy storage regional planning strategy evaluation index

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Comprehensive control of steering and braking via a 4WIS-4WID vehicle

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Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao 2021年第3期42卷 303-313页

作者： Lei, Yulong Wen, Guanzheng Geng, Xiaohu Fu, Yao Li, Xingzhong Hu, Jianlong State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China Qingdao Automotive Research Institute Jilin University Qingdao China

Four-wheel independent steering and four- wheel independent driving (4WIS-4WID) vehicles have multiple degrees of control freedom. Thus, these vehicles have considerable development potential. However, 4WIS-4WID vehicles easily cause coupling interference between the steering and braking systems. Such interference leads to remarkable difficulties in the design and optimisa-tion of the control system. The comprehensive control of the two systems is realised on the basis of 4WIS-4WID vehicles in this paper. Such control solves the coupling problem between the two systems and achieves improved handling perfor-mance whilst guaranteeing the braking stability. This paper mainly includes two parts. Firstly, the linear two degrees-of-freedom model is regarded as a reference model, and a sliding-mode controller is designed to achieve good handling performance. Secondly, a neural network PID cooperative controller is designed to maintain braking stability whilst ensuring handling performance. Lastly, a Simulink/CarSim joint simulation is conducted to confirm the good performance of the proposed strategy. © 2021, Chinese Mechanical Engineering Society. All right reserved.

关键词： Sliding mode control

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Estimation for ammonia emissions at county level in China from 2013 to 2018

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Science China Earth Sciences 2022年第6期65卷 1116-1127页

作者： Wenling LIAO Mingxu LIU Xin HUANG Tiantian WANG Zhenying XU Fang SHANG Yu SONG Xuhui CAI Hongsheng ZHANG Ling KANG Tong ZHU State Key Joint Laboratory of Environmental Simulation and Pollution Control Department of Environmental SciencePeking UniversityBeijing 100871China Joint International Research Laboratory of Atmospheric and Earth System Sciences School of Atmospheric SciencesNanjing UniversityNanjing 210023China Laboratory for Atmosphere-Ocean Studies Department of Atmospheric and Oceanic ScienceSchool of PhysicsPeking UniversityBeijing 100871China

Ammonia (NH_(3)) can interact with other trace chemicals in the atmosphere,significantly impacting atmospheric chemistry and global climate *** is a largely agricultural country with high consumption of nitrogen fertilizer and large livestock herds,resulting in high NH_(3) *** this study,a comprehensive county-level inventory of Chinese NH_(3) emissions from 2013 to 2018 was *** on previous research,an estimate of NH_(3) emissions from household coal combustion was added to the *** estimation of emissions from open biomass burning was improved by using a method based on fire radiative energy (FRE).The total NH_(3) emissions in China increased from 2013 (9.64 Tg) to 2015 (9.75 Tg),and then decreased to 9.12 Tg in *** from fossil fuels reached a peak value in 2018,accounting for 8.4%of total emissions,while fertilizer application and livestock waste were responsible for fewer emissions than in previous years,accounting for 27.7%and 49.9%of the total from non-fossil fuel sources,*** highest emission rates were in central and southwestern ***,NH_(3) emissions peaked in spring and *** inventory had a 1-km spatial resolution and a monthly temporal resolution,which confirmed its suitability for global and regional air quality simulations.

关键词： Ammonia emission Seasonal variations Spatial distribution Policy Suggestions China

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A Mode-Switching Soot Load Observer for Automotive Particulate Filters

A Mode-Switching Soot Load Observer for Automotive Particula...

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Conference on Vehicle control and Intelligence (CVCI)

作者： Xiangxue Lin Yunfeng Hu Linlin Jiang Xun Gong Yao Sun State Key Laboratory of Automotive Simulation and Control College of Telecommunications Engineering Jilin University Changchun China FAW-Volkswagen Technology Center Changchun China State Key Laboratory of Automotive Simulation and Control College of Artificial Intelligence Jilin University Changchun China State Key Laboratory of Automotive Simulation and Control College of Automotive Engineering Jilin University Changchun China

In automotive particulate filter applications, accurate real-time soot load is critical to filter regeneration, which significantly affects vehicle safety and economics. Based on the modified soot accumulation and filter pressure drop characteristics, equations of state and measurement have been deduced, and a corresponding novel Luenberger observer is developed. Due to the limitations of the differential pressure sensor, the deviation of its measurement value is small at small exhaust flow rates and can not reflect the soot load. To figure out this issue, a mode-switching strategy is proposed to schedule the correction gain according to the exhaust flow rate. A co-simulation platform has been built to validate the observer, which adopts GT-Power as the test vehicle. Compared with the open-loop observer under single and multiple NEDC cycles, the mode-switching observer shows some improvement, and the maximum deviation is reduced from 0.58g/L to 0.1g/L. Thus, by reducing the times of regenerations, fuel consumption can be saved about 8%. Finally, the proposed observer shows better robustness when a disturbance occurs, the maximum deviation still maintain a low level of about 0.25g/L.

关键词：

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Chemical characteristics,oxidative potential,and sources of PM_(2.5)in wintertime in Lahore and Peshawar,Pakistan

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Journal of Environmental Sciences 2021年第4期33卷 148-158页

作者： Mushtaq Ahmad Qing Yu Jing Chen Siming Cheng Weihua Qin Yuepeng Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China Department of Environmental Sciences University of PeshawarPeshawar 25120Pakistan

The chemical characteristics,oxidative potential,and sources of PM_(2.5)were analyzed at the urban sites of Lahore and Peshawar,Pakistan in February *** species,water soluble ions,and metal elements were measured to investigate the chemical composition and sources of PM_(2.5).The dithiothreitol(DTT)consumption rate was measured to evaluate the oxidative potential of PM_(2.5).Both cities showed a high exposure risk of PM_(2.5)regarding its oxidative potential(DTT v).Carbonaceous and some of the elemental species of PM_(2.5)correlated well with DTT v in both Lahore and ***,the DTT v of PM_(2.5)in Lahore showed significant positive correlation with most of the measured water soluble ions,however,ions were DTT-inactive in *** to the higher proportions of carbonaceous species and metal elements,Peshawar showed higher mass-normalized DTT activity of PM_(2.5)compared to Lahore although the average PM_(2.5)concentration in Peshawar was *** high concentrations of toxic metals also posed serious non-carcinogenic and carcinogenic risks to the residents of both *** component analysis coupled with multiple linear regression was applied to investigate different source contributions to PM_(2.5)and its oxidative *** sources of traffic and road dust resuspension and coal combustion,direct vehicle emission,and biomass burning and formation of secondary aerosol were identified as the major sources of PM_(2.5)in both *** findings of this study provide important data for evaluation of the potential health risks of PM_(2.5)and for formulation of efficient control strategies in major cities of Pakistan.

关键词： Air pollution DTT Health risk Oxidative potential Source apportionment

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Cerium-tungsten oxides supported on activated red mud for the selective catalytic reduction of NO_(x)

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Green Energy & Environment 2023年第1期8卷 173-182页

作者： Qiuzhun Chen Dong Wang Chuan Gao Bin Wang Shengli Niu Gaiju Zhao Yue Peng Junhua Li Chunmei Lu John Crittenden National Engineering Laboratory for Coal-Burning Pollutants Emission Reduction School of Energy and Power EngineeringShandong UniversityJinan250061China State Key Joint Laboratory of Environment Simulation and Pollution Control National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and EquipmentSchool of EnvironmentTsinghua UniversityBeijing100084China Brook Byers Institute for Sustainable Systems and School of Civil and Environmental Engineering Georgia Institute of Technology828 West Peachtree StreetAtlantaGA30332United States Energy Institute Qilu University of Technology(Shandong Academy of Sciences)Jinan250013ShandongChina

Activated red mud(RM)has been proved to be a promising base material for the selective catalysis reduction(SCR)of *** inherent low reducibility and acidity limited its low-temperature *** this work,molybdenum oxide,tungsten oxide,and cerium oxide were used to reconfigure the redox sites and acid sites of red mud based *** activated red mud was reconfigured by cerium-tungsten oxide(Ce-W@RM),the NOx conversion kept above 90%at 219-480℃.The existence of Ce^(3+)/Ce^(4+) redox electron pairs provided more surface adsorbed oxygen(O_(α)) and served as a redox *** interactions between Ce,W species and Fe oxide in red mud occurred,which led to the formation of unsaturated chemical bond and promoted the activation of adsorbed NH_(3) ***_(3) and Ce_(2)(WO_(4))_(3)(formed by solid-state reaction between Ce and W species)could provide more Brønsted acid sites(W-O modes of WO_(3),W=O or W-O-W modes of Ce_(2)(WO_(4))_(3)).CeO_(2) species could provide more Lewis acid *** Langmuir-Hinshelwood(L-H)routes and Eley-Rideal(E-R)routes occurred in the low-temperature SCR reaction on the Ce-W@RM ***_(4)^(+) species on Brønsted acid sites,NH_(3) species on Lewis acid sites,bidentate nitrate and bridging nitrate species were key active intermediates species.

关键词： Air pollution control NOx Selective catalytic reduction Cerium Tungsten

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