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Light emission from multiple self-trapped excitons in one-dimensional Ag-based ternary halides

Chinese Physics B 2024年第11期33卷 62-69页

作者： Jiahao Xie Zewei Li Shengqiao Wang Lijun Zhang State Key Laboratory of Integrated Optoelectronics Key Laboratory of Automobile Materials of MOEKey Laboratory of Material Simulation Methods & Software of MOESchool of Materials Science and EngineeringJilin UniversityChangchun 130000China

Ternary metal halides based on Cu(I)and Ag(I)have attracted intensive attention in optoelectronic applications due to their excellent luminescent properties,low toxicity,and robust *** the self-trapped excitons(STEs)emission mechanisms of Cu(I)halides are well understood,the STEs in Ag(I)halides remain less thoroughly *** study explores the STE emission efficiency within the A_(2)AgX_(3)(A=Rb,Cs;X=Cl,Br,I)system by identifying three distinct STE states in each material and calculating their configuration coordinate *** find that the STE emission efficiency in this system is mainly determined by STE stability and influenced by self-trapping and quenching ***,we investigate the impact of structural compactness on emission efficiency and find that the excessive electron–phonon coupling in this system can be reduced by increasing the structural *** atomic packing factor is identified as a low-cost and effective descriptor for predicting STE emission efficiency in both Cs_(2)AgX_(3) and Rb_(2)AgX_(3) *** findings can deepen our understanding of STE behavior in metal halide materials and offer valuable insights for the design of efficient STE luminescent *** datasets presented in this paper are openly available in Science Data Bank at https://***/10.57760/sciencedb.12094.

关键词： self-trapped exciton Ag-based ternary halides configuration coordinate diagrams emission efficiency

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Catalytic ozonation in advanced treatment of kitchen wastewater:multi-scale simulation and pilot-scale study

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Frontiers of Environmental Science & Engineering 2023年第12期17卷 47-58页

作者： Zuoyong Zhou Ni Yan Mengxi Yin Tengfei Ren Shuning Chen Kechao Lu Xiaoxin Cao Xia Huang Xiaoyuan Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Catalytic ozonation is regarded as a promising technology in the advanced treatment of refractory organic ***-bed reactors are widely used in practical applications due to simple structures,installation and ***,mass transfer of packed-bed reactors is relatively restrained and amplified deviations usually occurred in scale-up ***,a multi-scale packed-bed model of catalytic ozonation was established to guide pilot ***,a laboratory-scale test was conducted to obtain kinetic parameters needed for ***,a multi-scale packed-bed model was developed to research the effects of water distribution structure,catalyst particle size,and hydraulic retention time(HRT)on catalytic *** was found that the performance of packed bed reactor was increased with evenly distributed water inlet,HRT of 60 min,and catalyst diameter of about 3-7 ***,an optimized reactor was manufactured and a pilot-scale test was conducted to treat kitchen wastewater using catalytic ozonation *** the pilot-scale test with an ozone dosage of 50 mg/L and HRT of 60 min,the packed-bed reactor filled with catalysts I was able to reduce chemical oxygen demand(COD)from 117 to 59 mg/*** performance of the catalytic ozonation process in the packed-bed reactor for the advanced treatment of actual kitchen wastewater was investigated via both multi-scale simulation and pilot-scale tests in this study,which provided a practical method for optimizing the reactors of treating refractory organic wastewater.

关键词： Catalytic ozonation Multi-scale simulation Pilot-scale study Kitchen wastewater

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Differentiated emission control strategy based on comprehensive evaluation of multi-media pollution:Case of mercury emission control

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Journal of Environmental Sciences 2023年第1期123卷 222-234页

作者： Dongwei Lv Qingru Wu Daiwei Ouyang Minneng Wen Gehui Zhang Shuxiao Wang Lei Duan State Key Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

In order to comprehensively evaluate the environmental impact of multi-media mercury pollution under differentiated emission control strategies in China,a literature review and case studies were carried *** human exposure to methylmercury was assessed through the dietary intake of residents in areas surrounding a typical coal-fired power plant and a zinc(Zn)smelter,located either on acid soil with paddy growth in southern China,or on alkaline soil with wheat growth in northern *** with knowledge on speciated mercury in flue gas and the fate of mercury in the wastewater or solid waste of the typical emitters applying different air pollution control devices,a simplified model was developed by estimating the incremental daily intake of methylmercury from both local and global *** indicated that air pollution control for coal-fired power plants and Zn smelters can greatly reduce health risks from mercury pollution,mainly through a reduction in global methylmercury exposure,but could unfortunately induce local methylmercury exposure by transferring more mercury from flue gas to wastewater or solid waste,then contaminating surrounding soil,and thus increasing dietary intake via ***,tightening air emission control is conducive to reducing the comprehensive health risk,while the environmental equity between local and global pollution control should be fully *** in the south tends to have higher bioconcentration factors than wheat in the north,implying the great importance of strengthening local pollution control in the south,especially for Zn smelters with higher contribution to local pollution.

关键词： Mercury emission Methylmercury Heavy metal Bioconcentration factor Estimated daily intake Health risk assessment

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Open-source dataset for traffic light and countdown display detection in urban environment

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Science China(Information Sciences) 2025年第5期68卷 407-408页

作者： Shuchun WAN Haitao DING Jianwei ZHANG Yunfeng HU Hong CHEN State Key Laboratory of Automotive Simulation and Control Jilin University Department of Control Science and Engineering Jilin University College of Electronic and Information Engineering Tongji University

Here we introduce an open-source dataset for traffic light and countdown display detection,which includes three subsets:a subset of traffic light data,a subset of traffic light and countdown display data,and a subset ...

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Win-Win:Anthropogenic circularity for metal criticality and carbon neutrality

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Frontiers of Environmental Science & Engineering 2023年第2期17卷 111-122页

作者： Xianlai Zeng State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Resource depletion and environmental degradation have fueled a burgeoning discipline of anthropogenic circularity since the *** generally consists of waste reuse,remanufacturing,recycling,and *** economy and“zero-waste”cities are sweeping the globe in their current practices to address the world’s grand concerns linked to resources,the environment,and ***,metal criticality and carbon neutrality,which have become increasingly popular in recent years,denote the material's feature and state,*** goal of this article is to determine how circularity,criticality,and neutrality are *** anthropogenic circularity has the potential to expand the metal supply and,as a result,reduce metal *** barely accomplished 15%of its potential emission reduction by recycling iron,copper,and *** circularity has a lot of room to achieve a win-win objective,which is to reduce metal criticality while also achieving carbon neutrality in a near closed-loop *** barriers or challenges for conducting anthropogenic circularity are deriving from the inadequacy of life-cycle insight governance and the emergence of anthropogenic circularity *** flow analysis and life cycle assessment are the central methodologies to identify the hidden *** processing and smelting,as well as end-of-life management,are indicated as critical priority areas for enhancing anthropogenic circularity.

关键词： Anthropogenic circularity Material flow analysis Criticality Carbon neutrality Solid waste Circular economy

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Feasibility study of a process for the reduction of sulfur oxides in flue gas of fluid catalytic cracking unit using the riser reactor

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Petroleum Science 2025年第2期22卷 909-924页

作者： Fa-Lu Dang Gang Wang Jing-Cun Lian Yu Yang Mei-Jia Liu State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of PetroleumBeijing102249China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China

In this work,a new process for achieving the recovery of elemental sulfur by utilizing a fluidized catalytic cracking(FCC) riser reactor for SOxtreatment(FCC-DeSOx) is *** process leverages the high temperatures and hydrocarbon concentrations in the FCC riser reactor to convert SOxinto H_(2)***,H_(2)S,along with the cracked gas,is processed downstream to produce *** analysis of the key reduction reactions in the FCC-DeSOxprocess revealed that complete conversion of SOxto H_(2)S is feasible in the dry gas(hydrogen-rich) prelift zone,as well as the upper and lower zones of the riser,upon achieving thermodynamic *** studies were conducted to replicate the conditions of these reaction zones using a low concentration of hydrogen gas as the reducing *** process optimization,investigation of the minimum reaction time,and kinetic studies,the potential of this method for the complete reduction of SOxwas further confirmed.

关键词： Sulfur oxides New catalytic cracking process Thermodynamic analysis Kinetic analysis Sulfur recovery

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Design of energy-saving driving strategy based on proximal policy optimization considering urban transport information

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control Theory and Technology 2025年第1期23卷 74-90页

作者： Qifang Liu Dazhen Sun Haowen Chen Dongzi Li Ping Wang Department of Control Science and Engineering Jilin UniversityChangchun130022JilinChina State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun130022JilinChina

Eco-driving has always been an ongoing *** urban driving conditions,traffic regulations,other vehicle behaviors,and special driving scenarios will have a major impact on the energy consumption of autonomous *** a representative algorithm of artificial intelligence,reinforcement learning has the ability to perform well under complex *** paper uses deep reinforcement learning algorithms to design the economical driving strategies of autonomous vehicles in three driving scenarios:driving at signalized intersection under free traffic flow,car-following on ramps,and driving at signalized intersection considering queue *** the above three driving scenarios,the driving strategy proposed in this paper achieves economical driving performance while satisfying the driving scenario requirements.

关键词： Eco-driving strategy Reinforcement learning Signalized intersection Car-following

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Accurate prediction of air quality response to emissions for effective control policy design

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Journal of Environmental Sciences 2023年第1期123卷 116-126页

作者： Min Cao Jia Xing Shovan Kumar Sahu Lei Duan Junhua Li State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

Designing effective control policy requires accurate quantification of the relationship between the ambient concentrations of O3and PM2.5and the emissions of their ***,the challenge is that precursor reduction does not necessarily lead to decreases in the concentrations of O3and PM2.5,which are formed by multiple precursors under complex physical and chemical processes;this calls for the development of advanced model technologies to provide accurate predictions of the nonlinear responses of air quality to *** from the traditional sensitivity analysis and source apportionment methods,the reduced form models(RFMs)based on chemical transport models(CTMs)are able to quantify air quality responses to emissions more accurately and efficiently with lower computational *** we review recent approaches used in RFMs and compare their structures,advantages and disadvantages,performance and *** general,RFMs are classified into three types including(1)sensitivity-based models,(2)models with simplified chemistry and physical processes,and(3)statistical models,with considerable differences in principles,characteristics and application *** prediction of nonlinear responses by RFMs enables more in-depth analysis,not only in terms of real-time prediction of concentrations and quantification of human exposure,health impacts and economic damage,but also in optimizing control ***,data assimilation and emission inventory inversion based on the nonlinear response of concentrations to emissions can also be greatly beneficial to air pollution control *** future studies,improvement in the performance of CTMs is exceedingly crucial to obtain a more reliable baseline for the prediction of air quality *** of models to determine the air quality response to emissions under varying meteorological conditions is also necessary in the context of future climate changes,which pose great challenges to the qua

关键词： Air pollution Nonlinear response Air quality management Reduced form models(RFMs) Precursor emissions

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Achieving high ductility and low in-plane anisotropy in magnesium alloy through a novel texture design strategy

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Journal of Magnesium and Alloys 2024年第7期12卷 2863-2873页

作者： Shi Liu Cheng Wang Hong Ning Zhao-Yuan Meng Kai Guan Hui-Yuan Wang State Key Laboratory of Automotive Simulation and Control Jilin UniversityPR China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Nanling CampusJilin UniversityNo.5988 Renmin StreetChangchun130025 PR China State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Material Science and EngineeringHebei University of TechnologyTianjin300130 PR China

Texture regulation is a prominent method to modify the mechanical properties and anisotropy of magnesium *** this work,the Mg-1Al-0.3Ca-0.5Mn-0.2Gd(wt.%)alloy sheet with TD-tilted and circular texture was fabricated by unidirectional rolling(UR)and multidirectional rolling(MR)method,*** generating a strong in-plane mechanical anisotropy in conventional TD-tilted texture,the novel circular texture sample possessed a weak in-plane yield *** can be rationalized by the similar proportion of soft grains with favorable orientation for basalslip and{10.12}tensile twinning during the uniaxial tension of circular-texture sample along different ***,compared with the TD-tilted texture,the circular texture improved the elongation to failure both along the rolling direction(RD)and transverse direction(TD).By quasi-in-situ EBSD-assisted slip trace analysis,higher activation of basal slip was observed in the circular-texture sample during RD tension,contributing to its excellent *** loading along the TD,the TD-tilted texture promoted the activation of{10.12}tensile twins significantly,thus providing nucleation sites for cracks and deteriorating the *** research may shed new insights into the development of formable and ductile Mg alloy sheets by texture modification.

关键词： Magnesium alloy TD-tilted texture Circular texture In-plane yield anisotropy Ductility

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state Estimation of Drive-by-Wire Chassis Vehicle Based on Dual Unscented Particle Filter Algorithm

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 99-113页

作者： Zixu Wang Chaoning Chen Quan Jiang Hongyu Zheng Chuyo Kaku State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130022China Jiangsu Chaoli Electric Co.Ltd. Zhenjiang 212321China

Accurate vehicle dynamic information plays an important role in vehicle driving ***,due to the characteristics of high mobility and multiple controllable degrees of freedom of drive-by-wire chassis vehicles,the current mature application of traditional vehicle state estimation algorithms can not meet the requirements of drive-by-wire chassis vehicle state *** paper proposes a state estimation method for drive-by-wire chassis vehicle based on the dual unscented particle filter algorithm,which make full use of the known advantages of the four-wheel drive torque and steer angle parameters of the drive-by-wire chassis *** the dual unscented particle filter algorithm,two unscented particle filter transfer information to each other,observe the vehicle state information and the tire force parameter information of the four wheels respectively,which reduce the influence of parameter uncertainty and model parameter changes on the estimation accuracy during *** performance with the dual unscented particle filter algorithm,which is analyzed in terms of the time-average square error,is superior of the unscented Kalman filter *** effectiveness of the algorithm is further verified by driving simulator *** this paper,a vehicle state estimator based on dual unscented particle filter algorithm was proposed for the first time to improve the estimation accuracy of vehicle parameters and states.

关键词： Drive-by-wire chassis vehicle Vehicle state estimation Dual unscented particle filter Tire force estimation Unscented particle filter

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