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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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Representation of the Stratospheric Circulation in CRA-40 Reanalysis:The Arctic Polar Vortex and the Quasi-Biennial Oscillation

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Advances in Atmospheric Sciences 2024年第5期41卷 894-914页

作者： zixu wang Shirui YAN Jinggao HU Jiechun DENG Rongcai REN Jian RAO Key Laboratory of Meteorological Disaster Ministry of Education(KLME)Joint International Research Laboratory of Climate and Environment Change(ILCEC)Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

The representation of the Arctic stratospheric circulation and the quasi-biennial oscillation(QBO)during the period 1981–2019 in a 40-yr Chinese global reanalysis dataset(CRA-40)is evaluated by comparing two widely used reanalysis datasets,ERA-5 and ***-40 demonstrates a comparable performance with ERA-5 and MERRA-2 in characterizing the winter and spring circulation in the lower and middle Arctic ***,differences in the climatological polar-mean temperature and polar night jet among the three reanalyses are within±0.5 K and±0.5 m s^(–1),*** onset dates of the stratospheric sudden warming and stratospheric final warming events at 10 hPa in CRA-40,together with the dynamics and circulation anomalies during the onset process of warming events,are nearly identical to the other two reanalyses with slight *** contrast,the CRA-40 dataset demonstrates a deteriorated performance in describing the QBO below 10 hPa compared to the other two reanalysis products,manifested by the larger easterly biases of the QBO index,the remarkably weaker amplitude of the QBO,and the weaker wavelet power of the QBO *** pronounced biases are mainly concentrated in the period 1981–98 and largely reduced by at least 39%in 1999–***,particular caution is needed in studying the QBO based on *** three reanalyses exhibit greater disagreement in the upper stratosphere compared to the lower and middle stratosphere for both the polar region and the tropics.

关键词： CRA-40 ERA-5 MERRA-2 Arctic stratosphere the QBO

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Decentralized optimal control for modular and reconfigurable robots based on adaptive dynamic programming 36

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Decentralized optimal control for modular and reconfigurable...

A potential-driven switch of activity promotion mode for the oxygen evolution reaction at Co_(3)O_(4)/NiO_(x)H_(y) interface

第36届中国控制会议

作者： zixu wang Bo Dong Hongbing Xia Yuanchun Li Department of Control Science and Engineering Changchun University of Technology State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences

ISBN: (纸本)9781538629185

This paper presents a decentralized optimal control method for modular and reconflgurable robots（MRRs） based on adaptive dynamic ***,the dynamic model of MRRs is formulated by using the Newton-Euler iterative algorithm,and then the state space description is ***,the optimal control policy of the MRRs system is obtained based on the policy iteration algorithm,which is used to solve the Hamilton-Jacobi-Bellman（HJB） equation via the critic neural ***,the stability of the closed-loop system is proved by using the Lyapunov ***,simulations are conducted to illustrate the effectiveness for the 2-DOF MRRs.

关键词： Modular and reconfigurable robot Decentralized control strategy Adaptive dynamic programming Neural network

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eScience 2022年第4期2卷 438-444页

作者： wang wang zixu wang Youcheng Hu Yucheng Liu Shengli Chen Electrochemical Power Sources Key Laboratory Department of ChemistryWuhan UniversityWuhan430072China Wuhan University Testing Center Wuhan UniversityWuhan430072China

Co_(3)O_(4)spinel oxides have manifested promising activity toward the oxygen evolution reaction(OER)through effective *** them to become top electrocatalysts,however,accurate accounts of the catalytic kinetics are essential to gain a deep understanding of the activity promotion ***,we use a newly proposed kinetic model based on energetic span as the rate-determining term for the electrocatalytic reaction to throw light on the promotion mechanism of Co_(3)O_(4)interfaced with nickel hydroxides(NiO_(x)H_(y))for the *** find that depending on the electrode potential,the OER kinetics at the designed interface between Co_(3)O_(4)and NiO_(x)H_(y)are boosted in entirely different *** a result,the OER can occur at a lower onset potential as well as a low Tafel *** work emphasizes the benefit of using rational theoretical models for electrocatalyst design.

关键词： Oxygen evolution reaction Interface engineering Double exchange interaction Potential-driven switch of mechanism Energetic span

Video Recognition for Analyzing the Characteristics of Vehicle–Bicycle Conflict

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Computers, Materials & Continua 2021年第11期69卷 2779-2791页

作者： Xingjian Xue zixu wang Linjuan Ge Lirong Deng Rui Song Neal Naixue Xiong College of Logistics and Traffic Central South University of Forestry and TechnologyChangsha410004HunanChina Department of Mathematics and Computer Science Northeastern State UniversityTahlequah74464OKUnited States

Vehicle–bicycle conflict incurs a higher risk of traffic accidents,particularly as it frequently takes place at *** the traffic characteristics of vehicle–bicycle conflict and optimizing the design of intersections can effectively reduce such *** this paper,the conflict between right-turning motor vehicles and straight-riding bicycles was taken as the research object,and T-Analyst video recognition technology was used to obtain data on riding(driving)behavior and vehicle–bicycle conflict at seven intersections in Changsha,***,eight typical traffic characteristics of vehicle–bicycle conflict are summarized,the causes of vehicle–bicycle conflict are analyzed using 18 factors in three dimensions,the internal relationship between intersection design factors and traffic conflicts is explored,and the guiding of design optimization based on the width of bicycle lanes and the soft separation between vehicles and bicycles is *** results showed that colored paved bicycle lanes were better,performing better at a width of 2.5 m compared to 1.5 ***,the colored pavement was not suitable for the entire road and had to be set at the position,at which the trajectories of a bicycle and motor vehicle ***,a 2.5-m-wide bicycle lane provides good ***,there are still defects in the existing safety indicators,so it is necessary to develop new indicators to reflect real vehicle–bicycle conflict situations more comprehensively.

关键词： Vehicle-bicycle conflict video recognition technology bicycle lane width vehicle-bicycle separation method

Development and Comparison of Time Series Models in Predicting Severe Fever with Thrombocytopenia Syndrome Cases—Hubei Province,China,2013-2020

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China CDC weekly 2024年第37期6卷 962-967,I0011-I0014页

作者： zixu wang Jinwei Zhang Wenyi Zhang Nianhong Lu Qiong Chen Junhu wang Yingqing Mao Haiming Yi Yixin Ge Hongming wang Chao Chen Wei Guo Xin Qi Yuexi Li Ming Yue Yong Qi Huadong Research Institute for Medicine and Biotechniques Nanjing CityJiangsu ProvinceChina Bengbu Medical College Bengbu CityAnhui ProvinceChina Department of Anesthesiology Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjing CityJiangsu ProvinceChina Chinese PLA Center for Disease Control and Prevention BeijingChina The Second People’s Hospital of Yiyuan County Zibo CityShandong ProvinceChina Department of Infectious Diseases The First Affiliated Hospital of Nanjing Medical UniversityNanjing CityJiangsu ProvinceChina School of Public Health Nanjing Medical UniversityNanjing CityJiangsu ProvinceChina&Joint first authors.

Introduction:Severe fever with thrombocytopenia syndrome(SFTS)is an emerging infectious disease caused by the SFTS virus,which has a high mortality *** the number of SFTS cases is essential for early outbreak warning and can offer valuable insights for establishing prevention and control ***:In this study,data on monthly SFTS cases in Hubei Province,China,from 2013 to 2020 were *** time series models based on seasonal auto-regressive integrated moving average(SARIMA),Prophet,eXtreme Gradient Boosting(XGBoost),and long short-term memory(LSTM)were developed using these historical data to predict SFTS *** established models were evaluated and compared using mean absolute error(MAE)and root mean squared error(RMSE).Results:Four models were developed and performed well in predicting the trend of SFTS *** XGBoost model outperformed the others,yielding the closest fit to the actual case numbers and exhibiting the smallest MAE(2.54)and RMSE(2.89)in capturing the seasonal trend and predicting the monthly number of SFTS cases in Hubei ***:The developed XGBoost model represents a promising and valuable tool for SFTS prediction and early warning in Hubei Province,China.

关键词： Hubei prevention establishing

The Narrative Medicine Practice for the Treatment of Ben Tun Qi

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Chinese Medicine and Culture 2024年第4期7卷 306-311页

作者： wang zixu LIU Yipin Institute of Clinical Basic Medicine of Chinese Medicine China Academy of Chinese Medical SciencesBeijing 100700China

This article takes the narrative medicine practice of traditional Chinese medicine(TCM)in the treatment of Ben Tun Qi(奔豚气)as an example to illustrate the characteristics of narrative medicine in TCM diagnosis and treatment,and strives to form a simple,easy to implement,and practical process of narrative medicine of TCM,which can help doctors provide more comprehensive,detailed,and humanistic care for diagnosis and treatment activities,and achieve doctor-patient harmony.

关键词： Narrative medicine Ben Tun Qi(奔豚气) Traditional Chinese medicine

Time series models in prediction of severe fever with thrombocytopenia syndrome cases in Shandong province,China

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Infectious Disease Modelling 2024年第1期9卷 224-233页

作者： zixu wang Wenyi Zhang Ting Wu Nianhong Lu Junyu He Junhu wang Jixian Rao Yuan Gu Xianxian Cheng Yuexi Li Yong Qi Pest Control Department Huadong Research Institute for Medicine and BiotechniquesNanjingJiangsu province210002China Bengbu Medical College BengbuAnhui province233030China Chinese PLA Center for Disease Control and Prevention Beijing100071China Jinling Hospital Medical School of Nanjing UniversityNanjingJiangsu province210002China Ocean College Zhejiang UniversityZhoushan316021China Ocean Academy Zhejiang UniversityZhoushan316021China

Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease caused by the SFTS virus (SFTSV). Predicting the incidence of this disease in advance is crucial for policymakers to develop prevention and control strategies. In this study, we utilized historical incidence data of SFTS (2013–2020) in Shandong Province, China to establish three univariate prediction models based on two time-series forecasting algorithms Autoregressive Integrated Moving Average (ARIMA) and Prophet, as well as a special type of recurrent neural network Long Short-Term Memory (LSTM) algorithm. We then evaluated and compared the performance of these models. All three models demonstrated good predictive capabilities for SFTS cases, with the predicted results closely aligning with the actual cases. Among the models, the LSTM model exhibited the best fitting and prediction performance. It achieved the lowest values for mean absolute error (MAE), mean square error (MSE), and root mean square error (RMSE). The number of SFTS cases in the subsequent 5 years in this area were also generated using this model. The LSTM model, being simple and practical, provides valuable information and data for assessing the potential risk of SFTS in advance. This information is crucial for the development of early warning systems and the formulation of effective prevention and control measures for SFTS.

关键词： Severe fever with thrombocytopenia syndrome Long short-term memory Prediction model Autoregressive integrated moving average Prophet

Effects of Estrogen on Mucosal Structure and Numbers and Distribution of Intraepithelial Lymphocytes and Goblet Cells in Small Intestine of Rats

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Journal of Animal Science and Biotechnology 2011年第2期2卷 68-72页

作者： Jinkun Yan Yaoxing Chen zixu wang College of Veterinary Medicine China Agricultural University Beijing 100193 China College of Agriculture Hebei University of Engineering Handan Hebei 056038 China

To study the effects of estrogen on the structure of the intestinal mucosal barrier, 18 healthy female Wistar Rats underwent estrus synchronization. In diestrus, they were divided into three groups： one sham operated control group （SHAM） ; one ovariec- tomized group （OVX） ; and one ovariectomized plus estradiol benzoate group （ OVX ＋ E2 ）. Intestinal mu- cosal epithelial cells, intraepithelial lymphocytes （[EL）, and goblet cells （GCs） were observed by light microscope. The results showed that in the OVX group, the intestinal mucosa damaged obviously, the villus atrophied, the ratio of villus height to crypt depth reduced, and the number of IELs and GCs re- duced. The indicators of OVX ＋ Ez group were signif- icantly higher than OVX group, but some indicators were lower than SHAM. These indicated that the function of intestinal mucosal barrier was greatly dam- aged in ovariectomied rat, and proper dosage of estra- diol benzoate Would improve the function of small in- testinal mucosal barrier in ovariectomied rat to some degree.

关键词： estrogen goblet cells intestinal mucosal barrier intraepithelial lymphocytes smatl intestine

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