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Comprehensive Evaluation Method for Traffic Flow Data Quality.based on Grey.Correlation Analy.is and Particle Swarm Optimization

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Journal of Sy.tems Science and Sy.tems Engineering 2024年第1期33卷 106-128页

作者： Wei ba baojun Chen Qi Li School of Automation and Electrical Engineering Dalian Jiaotong UniversityDalian116028China Faculty.of Electronic Information and Electrical Engineering Dalian University of TechnologyDalian116023China

Nowaday.,data are more and more used for intelligent modeling and prediction,and the comprehensive evaluation of data quality.is getting more and more attention as a necessary.means to measure whether the data are usable or ***,the comprehensive evaluation method of data quality.mostly.contains the subjective factors of the evaluator,so how to comprehensively.and objectively.evaluate the data has become a bottleneck that needs to be solved in the research of comprehensive evaluation *** order to evaluate the data more comprehensively.objectively.and differentially.a novel comprehensive evaluation method based on particle swarm optimization(PSO)and grey.correlation analy.is(GCA)is presented in this *** first,an improved GCA evaluation model based on the technique for order preference by.similarity.to an ideal solution(TOPSIS)is ***,an objective function model of maximum difference of the comprehensive evaluation values is built,and the PSO algorithm is used to optimize the weights of the improved GCA evaluation model based on the objective function ***,the performance of the proposed method is investigated through parameter analy.is.A performance comparison of traffic flow data is carried out,and the simulation results show that the maximum average difference between the evaluation results and its mean value(MDR)of the proposed comprehensive evaluation method is 33.24%higher than that of TOPSIS-GCA,and 6.86%higher than that of *** proposed method has better differentiation than other methods,which means that it objectively.and comprehensively.evaluates the data from both the relevance and differentiation of the data,and the results more effectively.reflect the differences in data quality.which will provide more effective data support for intelligent modeling,prediction and other applications.

关键词： Data quality comprehensive evaluation particle swarm optimization grey.correlation analy.is traffic flow data

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Sy.thesis of granulated Li_(1.33)Mn_(1.67)O_(4) via two antisolvent methods for lithium adsorption from gas-produced water

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Chinese Journal of Chemical Engineering 2024年第5期69卷 34-46页

作者： Jun Qiu Lu-ri bao Wei Guo y.ng y.ng Shu-y.ng Sun National Engineering research Center for Integrated Utilization of Salt Lake resource East China University of Science and TechnologyShanghai 200237China

Gas-produced water is an accompany.ng wastewater in the natural gas extraction process,and it is a potential liquid lithium resource that contains a considerable amount of *** study.investigated the feasibility.of using manganese-based ion sieves to adsorb and extract lithium from gas-produced *** we focused on the applicability.of two different granulation methods,extrusion and droplet,in gas-produced water *** ty.es of H_(1.33)Mn_(1.67)O_(4) particles were prepared by.the extrusion method(EHMO)and the droplet method(DHMO).The porosity.of DHMO was much higher than that of EHMO,and the adsorption performance of DHMO increased with the decrease of binder *** prepared with a binder concentration of 0.14 g·ml^(-1)exhibited the best adsorption performance in gas-produced water,and the Li^(+)adsorption capacity.could reach 25.14 mg·g^(-1).In gas-produced water,the adsorption equilibrium of DHMO only.took 9 h,and the adsorption process conformed to the Langmuir model and pseudo-second-order kinetic *** pore diffusion model(PDM)could well describe its adsorption ***,DHMO showed a great selectivity.to Li^(+),and the selectivity.order of DHMO in gas-produced water was Li^(+)>ba^(2+)>>Mg^(2+),Ca^(2+),Sr^(2+)>>Na^(+)>>K^(+).After 20 cy.les,the Li^(+)adsorption capacity.was still higher than 17.30 mg·g^(-1),and the rate of manganese dissolution was less than 1%.

关键词： Gas-produced water Granulation Li_(1.33)Mn_(1.67)O_(4)

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recent progress in the research on magnesium and magnesium alloy.foils:A short review

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International Journal of Minerals,Metallurgy.and Materials 2024年第5期31卷 842-854页

作者： Qiuy.n Shen y.ngxing ba Peng Zhang Jiangfeng Song Bin Jiang Fusheng Pan National Engineering research Center for Magnesium Alloy. Chongqing UniversityChongqing 400044China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China National Key.Laboratory.of Advanced Casting Technologies Chongqing UniversityChongqing 400044China

Magnesium and magnesium alloy.foils have great potential for application in battery.anodes,electromagnetic shielding,optics and acoustics,and biology.because of their excellent specific damping,internal dissipation coefficients,magnetic and electrical conductivities,as well as high theoretical specific ***,magnesium alloy. exhibit poor deformation ability.due to their hexagonal close-packed cry.tal *** magnesium and magnesium alloy.foils with thicknesses of less than 0.1 mm is difficult because of surface oxidation and grain growth at high temperatures or severe anisotropy.after cold rolling that leads to *** methods have been applied to prepare magnesium alloy.*** include warm rolling,cold rolling,accumulative roll bonding,electric plastic rolling,and on-line heating *** of magnesium and magnesium alloy.foils during preparation,such as edge cracks and breakage,are important factors for ***,the current status of the research on magnesium and magnesium alloy.foils is summarized from the aspects of foil preparation,defect control,performance characterization,and application *** advantages and disadvantages of different preparation methods and defect(edge cracks and breakage)mechanisms in the preparation of foils are identified.

关键词： magnesium alloy.foil rolling defect performance application

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Phy.ics-based seismic analy.is of ancient wood structure:fault-to-structure simulation

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Earthquake Engineering and Engineering Vibration 2024年第3期23卷 727-740页

作者： ba Zhenning Fu Jisai Wang Fangbo Liang Jianwen Zhang Bin Zhang Long State Key.Laboratory.of Hy.raulic Engineering Intelligent Construction and Operation (Tianjin University)Tianjin 300350China School of Civil Engineering Tianjin UniversityTianjin 300350China Administrative Office of the Summer Palace Beijing 100091China School of Architecture Tianjin UniversityTianjin 300072China

based on the domain reduction method,this study.employ. an SEM-FEM hy.rid workflow which integrates the advantages of the spectral element method(SEM)for flexible and highly.efficient simulation of seismic wave propagation in a three-dimensional(3D)regional-scale geophy.ics model and the finite element method(FEM)for fine simulation of structural response including soil-structure interaction,and performs a phy.ics-based simulation from initial fault rupture on an ancient wood *** verification of the hy.rid workflow,a large-scale model of an ancient wood structure in the Beijing area,The Tower of Buddhist Incense,is established and its responses under the 1665 Tongxian earthquake and the 1730 y.hey.an earthquake are *** results from the simulated ground motion and seismic response of the wood structure under the two earthquakes demonstrate that this hy.rid workflow can be employ.d to efficiently.provide insight into the relationships between geophy.ical parameters and the structural response,and is of great significance toward accurate input for seismic simulation of structures under specific site and fault conditions.

关键词： spectral element method finite element method fault-to-structure simulation phy.ical model domain reduction method

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Force Compensation Control for Electro-Hy.raulic Servo Sy.tem with Pump-Valve Compound Drive via QFT-DTOC

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 228-246页

作者： Kaixian ba y.an Wang Xiaolong He Chuny. Wang Bin y. y.liang Liu Xiangdong Kong Hebei Provincial Key.Laboratory.of Heavy.Machinery.Fluid Power Transmission and Control Qinhuangdao 066004China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China National Engineering research Center for Local Joint of Advanced Manufacturing Technology.and Equipment Yanshan UniversityQinhuangdao 066004China

Each joint of a hy.raulic-driven legged robot adopts a highly.integrated hy.raulic drive unit(HDU),which features a high power-weight ***,most HDUs are throttling-valve-controlled cy.inder sy.tems,which exhibit high energy.*** contrast,pump control sy.tems offer a high ***,their response ability.is *** fully.utilize the advantages of pump and valve control sy.tems,in this study.a new ty.e of pump-valve compound drive sy.tem(PCDS)is designed,which can not only.effectively.reduce the energy.loss,but can also ensure the response speed and response accuracy.of the HDUs in robot joints to satisfy.the performance requirements of ***,considering the force control requirements of energy.conservation,high precision,and fast response of the robot joint HDU,a nonlinear mathematical model of the PCDS force control sy.tem is first *** addition,pressure-flow nonlinearity.friction nonlinearity.load complexity.and variability.and other factors affecting the sy.tem are considered,and a novel force control method based on quantitative feedback theory.QFT)and a disturbance torque observer(DTO)is designed,which is denoted as QFT-DTOC *** method improves the control accuracy.and robustness of the force control sy.tem,reduces the effect of the disturbance torque on the control performance of the servo motor,and improves the overall force control performance of the ***,experimental verification is performed using the PCDS performance test *** experimental results and quantitative data show that the QFT-DTOC proposed herein can significantly.improve the force control performance of the *** relevant force control method can be used as a bottom-control method for the hy.raulic servo sy.tem to provide a foundation for implementing the top-level trajectory.planning of the robot.

关键词： Legged robot Pump-valve compound drive sy.tem(PCDS) Force compensation control Quantitative feedback theory.QFT) Disturbance torque observer(DTO)

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The value of toxicological analy.is in acute poisoning patients with uncertain exposure histories:a retrospective and descriptive study.from an institute of poisoning

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World Journal of Emergency.Medicine 2024年第2期15卷 98-104页

作者： Qifang Shi Gen ba Zheny. Xia Zhengsheng Mao Hao Sun Jinsong Zhang Institute of Poisoning Nanjing Medical UniversityNanjing 211100China Department of Emergency.Medicine the First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China Department of Forensic Medicine Nanjing Medical UniversityNanjing 211166China The Key.Laboratory.of Modern Toxicology.of Ministry.of Education Nanjing Medical UniversityNanjing 211166China

baCKGROUND:In clinical practice,some patients might not be able or unwilling to provide a thorough history.of medication and poison *** aim of this study.was to use toxicological analy.is to examine the clinical characteristics of patients with acute poisoning whose exposure history.was uncertain from a toxicological analy.is ***:This was a retrospective and descriptive study.from an institute of *** registration information and test reports spanning the period from April 1,2020 to March 31,2022,were *** with uncertain exposure histories and who underwent toxicological analy.is were *** manifestations and categories of toxics were ***:Among the 195 patients with positive toxicological analy.is results,the main causes of uncertain exposure history.was disturbance of consciousness(62.6%),unawareness(23.6%)and unwillingness or lack of cooperation(13.8%).The predominant clinical manifestations were disturbed consciousness(62.6%),followed by.vomiting and nausea(14.4%)and liver function abnormalities(8.7%).A comparison of clinical manifestations between patients with positive and negative(n=99)toxicological analy.es results revealed significantly.different proportions of disturbances in consciousness(63%vs.21%),dizziness(1.5%vs.5.1%),multi-organ failure(1.5%vs.7.1%),and local pain(0 vs 4%).The main categories of substances involved were psy.hiatric medications(23.1%),sedatives(20.5%),insecticides(13.8%),and herbicides(12.8%).CONCLUSION:The clinical manifestations of acute poisoning in patients with an uncertain exposure history.are diverse and nonspecific,and toxicological analy.is play. a pivotal role in the diagnosis and differential diagnosis of such patients.

关键词： Acute poisoning Toxic exposure Toxicological analy.is Clinical manifestation

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Correlation of work function and stacking fault energy.through Kelvin probe force microscopy.and nanohardness in diluteα-magnesium

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Journal of Magnesium and Alloy. 2024年第1期12卷 237-250页

作者： y.git Türe Ali Arslan Kay. Hüsey.n Ay.in Jiang Peng Servet Turan Eskisehir Technical University Porsuk Vocational SchoolElectronics and Automation DepartmentProgram of MechatronicsEskisehirTurkey Mugla Sitki Kocman University Engineering FacultyMetallurgy and Materials Engineering DepartmentMuglaTurkey Hüsey.ng Ay.ın TUBITAK MRCTurkey Jiang Peng Chongqing UniversityChina Eskisehir Technical University Engineering FacultyMaterials Science and Engineering DepartmentEskisehirTurkey

Electronic interactions of the Group 2A elements with magnesium have been studied through the dilute solid solutions in binary.Mg-Ca,Mg-Sr and Mg-ba *** investigation incorporated the difference in the‘Work Function'(ΔWF)measured via Kelvin Probe Force Microscopy.KPFM),as a property.directly.affected by.interatomic bond ty.es,*** electronic structure,nanoindentation measurements,and Stacking Fault Energy.values reported in the *** was shown that the nano-hardness of the solid-solutionα-Mg phase changed in the order of Mg-Ca>Mg-Sr>***,it was shown,by.also considering the nano-hardness levels,that SFE of a solid-solution is closely.correlated with its‘Work Function'***-hardness measurements on the eutectics andΔWF difference between eutectic phases enabled an assessment of the relative bond strength and the pertinent electronic structures of the eutectics in the three *** withΔWF and at least qualitative verification of those computed SFE values with some experimental measurement techniques were considered important as those computational methods are based on zero Kelvin degree,relatively.simple atomic models and a number of *** asserted by.this investigation,if the results of measurement techniques can be qualitatively.correlated with those of the computational methods,it can be possible to evaluate the electronic structures in alloy.,starting from binary.sy.tems,going to ternary.and then multi-elemental *** investigation has shown that such a qualitative correlation is *** all,the SFE values are not treated as absolute values but rather become essential in comparative investigations when assessing the influences of alloy.ng elements at a fundamental level,that is,free electron density.*** study.indicated that the principles of‘electronic metallurgy.in developing multi-elemental alloy.sy.tems can be followed via practical experimental methods,i.e.ΔWF measurements using KPF

关键词： Mg alloy. Dilute alloy. Work function Stacking fault energy Kelvin probe force microscopy Short range order Miedema Nanoindentation Eutectics

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Aggregation of CeAlO_(3) inclusions in heavy.ingot of a steel containing 0.007% aluminum

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Journal of Iron and Steel research International 2024年第8期31卷 1960-1972页

作者： Qiu-y.e Zhou Jun-tao ba Lun Zhang Wei Chen y.ng ren Li-feng Zhang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

The distribution of inclusions at the bottom of a Ce-treated heavy.steel ingot was detected and *** three-dimensional morphology.and spatial distribution of CeAlOs clusters were characterized using the electroly.ic extraction and Micro-CT detection.A model of inclusion collision to predict the aggregation of CeAlO_(3) inclusions in the ingot was established and validated by.measured *** were mainly.CeAlO_(3) and a small amount of Ce_(2)O_(2)S in the tundish after cerium *** collision and aggregation of inclusions led to the formation of large clusters in the ingot during the solidification *** slag entrainment inclusions,large CeAO_(3) clusters and small CeAlO_(3) particles were observed from the center to the edge of the ingot *** inclusions were mainly.concentrated at the *** number density.of inclusions larger than 200μm was 0.21 mm^(-3).The maximum diameter of CeA1O_(3) clusters was 1340μ*** the edge to the radial center and from the bottom to the top,the average diameter of inclusions gradually.increased due to the longer solidification time of the ingot.

关键词： Inclusion Heavy.ingot Cerium treatment Collision

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Efficacy.and safety.of electroacupuncture for insomnia:A sy.tematic review and meta-analy.is

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Journal of Integrative Medicine 2024年第4期22卷 459-472页

作者： Han-y. Xu Lin-na Wu y.an Zhang Te ba Xiao-feng Zhao Acupuncture and Moxibustion Department First Teaching Hospital of Tianjin University of Traditional Chinese MedicineTianjin 300193China National Clinical research Center for Chinese Medicine Acupuncture and Moxibustion Tianjin 300193China

background:Electroacupuncture is often used to treat ***:To evaluate the efficacy.and safety.of electroacupuncture for *** strategy.Databases including PubMed,Cochrane Library.Embase,Web of Science,Chinese Biomedical Literature Database,China National Knowledge Infrastructure,Wanfang Data and VIP Fulltext e-Journals Database were searched up to January.15,*** criteria:Randomized clinical trials were included if they.compared the clinical efficacy.and safety.of electroacupuncture with sham acupuncture,no treatment or usual care (UC) and general *** extraction and analy.is:The full texts of the studies were reviewed to remove ineligible *** extracted data included authors,publication y.ar,diagnostic criteria,sample size,population characteristics,interventions and *** above steps were performed independently.by.two reviewers and the data were cross ***15.0 software was used to analy.e the extracted outcome *** continuous data (Pittsburgh Sleep Quality.Index[PSQI]score and Insomnia Severity.Index score),weighted mean difference (WMD) was calculated and 95% confidence interval (CI) was reported when the same scale was *** dichotomous variables (clinical response rate and adverse events),a meta-analy.is was performed using risk ratio (RR) as the effect ***:Thirty.one trials with 2226 subjects were *** meta-analy.is suggested that electroacupuncture was more effective in improving insomnia compared with the control group (sham acupuncture,no treatment,UC and general acupuncture)(RR=1.21;95 CI:[1.16,1.27]),significantly.reducing the PSQI score in insomnia patients after treatment and at follow-up (WMD=-3.23;95%CI:[-4.29,-2.17];Pre was no significant difference in the incidence of adverse events between the EA and control groups (sham acupuncture and no treatment or ***=1.48;95%CI:[0.91,2.40];P=0.117).In addition,the regression results revealed t

关键词： Electroacupuncture Insomnia Sy.tematic review Meta-analy.is

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Changes in microstructure and properties of weld heat-affected zone of high-strength low-alloy.steel

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Journal of Iron and Steel research International 2024年第8期31卷 2041-2052页

作者： Shu-jun Jia Qi-lin Ma y. Hou ba Li He-song Zhang Qing-y.u Liu Central Iron and Steel research Institute Co. Ltd.Beijing 100081China Collaborative Innovation Center for Steel Commonality University of Science and Technology BeijingBeijing 100083China Construction Project Management Branch of China National Petroleum Pipeline Network Group Co. Ltd.Langfang 065000HebeiChina

The evolution of the microstructure and toughness of APL5L X80 pipeline steel after thermal welding simulation was investigated by.X-ray.diffraction,electron backscatter diffraction,and transmission electron *** results indicated that primary.heat-affected zones can be divided into weld,coarse-grained,fine-grained,intercritical,and sub-critical *** microstructure of the weld zone is mainly.composed of bainitic ferrite and a small amount of granular bainite;however,the original austenite grains are distributed in the columnar *** structure of the coarse-grained zone is similar to that of the weld zone,but the original austenite grains are *** contrast,the microstructure in the fine-grained zone is dominated by.fine granular bainite,and the effective grain size is only.8.15μm,thus providing the highest toughness in the entire heat-affected *** intercritical and subcritical zones were brittle valley.regions,and the microstructure was dominated by.granular ***,the martensite-austenite(M/A)constituents are present in island chains along the grain boundaries,and the coarse size of the M/A constituents seriously.reduces the *** results of the crack propagation analy.es revealed that high-angle grain boundaries can significantly.slow down crack growth and change the crack direction,thereby.increasing the material *** impact toughness of the low-temperature tempering zone was equivalent to that of the columnar grain zone,and the impact toughness was between those of the critical and fine-grained zones.

关键词： Welding thermal simulation Impact toughness Crack propagation Martensite-austenite constituent High-strength low-alloy.steel weld Heat-affected zone

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