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IEEE/CAA Journal of Automatica Sinica 2022年第1期9卷 173-186页

作者： Ben Niu Jidong Liu Ding wang Xudong Zhao huanqing wang College of Information Science and Engineering Shandong Normal UniversityJinan 250014China School of Artificial Intelligence Nankai UniversityTianjin 300071China Faculty of Information Technology Beijing University of TechnologyBeijing 100124 State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Control Science and Engineering Dalian University of TechnologyDalian 116023China Department of Mathematical Science and Automatization Institute Bohai UniversityJinzhou 121000China

An adaptive decentralized asymptotic tracking control scheme is developed in this paper for a class of large-scale nonlinear systems with unknown strong interconnections,unknown time-varying parameters,and disturbances.First,by employing the intrinsic properties of Gaussian functions for the interconnection terms for the first time,all extra signals in the framework of decentralized control are filtered out,thereby removing all additional assumptions imposed on the interconnec-tions,such as upper bounding functions and matching conditions.Second,by introducing two integral bounded functions,asymptotic tracking control is realized.Moreover,the nonlinear filters with the compensation terms are introduced to circumvent the issue of“explosion of complexity”.It is shown that all the closed-loop signals are bounded and the tracking errors converge to zero asymptotically.In the end,a simulation example is carried out to demonstrate the effectiveness of the proposed approach.

关键词： Adaptive decentralized control asymptotic tracking control large-scale nonlinear systems unknown strong interconnections

Theaflavin-3，3′-digallate alleviates glucolipotoxicity-induced insulin secretion dysfunction in pancreatic β-TC-6 cells and zebrafish via anti-ferroptotic mechanisms by activating SERCA2

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Food Science and Human Wellness 2024年

作者： Kaixi wang huanqing Zhu Jiaxin Kang Shuna Chen Puming He Youying Tu Bo Li Department of Tea Science College of Agriculture and Biotechnology Zhejiang University

Theaflavins from black tea effectively improve insulin secretion in obesity and diabetes， but the molecular mechanisms are unclear. Here， the palmitic acid (PA)-induced pancreatic β-TC-6 cells and high fat-/high glucose-induced zebrafish were used. The effects of theaflavin-3，3′-digallate (TF3) on glucolipotoxicity-induced insulin secretion dysfunction， ferroptosis and endoplasmic reticulum (ER) stress were investigated by a variety of molecular biological approaches， inductively coupled plasma-mass spectrometry， transmission electron microscopy and widely targeted metabolomics analysis. TF3 was found to potently inhibit glucolipotoxicity-induced insulin secretion dysfunction and ferroptosis in β-TC-6 cells and zebrafish， with increasing glutathione peroxidase 4 (GPX4) expression， suppressing lipid peroxidation and iron accumulation and protecting mitochondria. Additionally， TF3 attenuated ER stress by regulating three unfolded protein response (UPR) pathways in β-TC-6 cells， and significantly modulated linoleic acid metabolism and L-kynurenine (Kyn) signalling in zebrafish. The expression of sarcoplasmic/endoplasmic reticulum calcium ATPase 2 (SERCA2) was obviously enhanced by TF3. Thapsigargin (Tg)， a SERCA2 inhibitor， remarkably reversed the effects of TF3 on insulin production， ferroptosis， ER stress and the Kyn signalling. Together， this work revealed for the first time the critical role of SERCA2 in ferroptosis regulation， and demonstrated TF3 targeted SERCA2 to inhibit ER stress and ferroptosis， thereby protecting β-cell secretory function from glucolipotoxicity.

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Adaptive Fuzzy Dynamic Surface Control of Flexible-Joint Robot Systems With Input Saturation

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IEEE/CAA Journal of Automatica Sinica 2019年第1期6卷 97-107页

作者： Song Ling huanqing wang Peter X.Liu the School of Mechanical Electronic and Control EngineeringBeijing Jiaotong University the Department of Mathematics Bohai University IEEE the Department of Systems and Computer Engineering Carleton University

In this paper, we propose an adaptive fuzzy dynamic surface control(DSC) scheme for single-link flexible-joint robotic systems with input saturation. A smooth function is utilized with the mean-value theorem to deal with the difficulties associated with input saturation. An adaptive DSC design with an auxiliary first-order filter is used to solve the "explosion of complexity"problem. It is proved that all the signals in the closed-loop system are semi-globally uniformly ultimately bounded, and the tracking error eventually converges to a small neighborhood around zero. The main advantage of the proposed method is that only one adaptation parameter needs to be updated,which reduces the computational burden significantly. Simulation results demonstrate the feasibility of the proposed scheme and the comparison results show that the improved DSC method can reduce the computational burden by almost two thirds in comparison with the standard DSC method.

关键词： Adaptive fuzzy control dynamic surface control (DSC) flexible-joint (FJ) robots single-link tracking control

Finite-time Adaptive Fault-tolerant Control for Nonlinear Systems With Multiple Faults

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IEEE/CAA Journal of Automatica Sinica 2019年第6期6卷 1417-1427页

作者： huanqing wang Wen Bai Peter Xiaoping Liu School of Mathematics Bohai UniversityJinzhou 121000China Department of Systems and Computer Engineering Carleton UniversityOttawaON K1S 5B6Canada

This paper focuses on the problem of adaptive finitetime fault-tolerant control for a class of non-lower-triangular nonlinear systems.The faults encountered in the control system include the actuator faults and the abrupt system fault.By applying backstepping design and neural networks approximation,an adaptive finite-time fault-tolerant control scheme is developed.It is shown that the proposed controller ensures that all signals in the closed-loop system are semi-globally practically finite-time stable and the track-ing error converges to a small neighborhood around the origin within finite time.The simulation is carried out to explain the validity of the developed strategy.

关键词： Adaptive control backstepping faults finite time

Assessment of tree-ring mercury radial translocation and age effect in Masson pine:Implications for historical atmospheric mercury reconstruction

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Journal of Environmental Sciences 2024年第4期138卷 266-276页

作者： Xu Liu Xun wang Dingyong wang College of Resources and Environment Southwest UniversityChongqing 400715China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

The tree ring has been regarded as an emerging archive to reconstruct historical atmospheric mercury(Hg)trends,but with the large knowledge gaps in the reliability.In this study,we comprehensively evaluated the Hg source,radial translocation and age effect of Masson pine(Pinus massoniana)tree ring at Mt.Jinyun in Chongqing,to assess the suitability of such tree ring as the archive of atmospheric Hg.Results showed that distinct variabilities among Masson pine tree-ring Hg concentration profiles.The Hg concentration significantly increased along with stem height(P<0.05),indicating the Hg in tree rings mainly derived from foliage uptake atmospheric Hg.We found a distinct age effect that the tree ring of young trees had the higher Hg concentration.Besides,we used the advection-diffusion model to demonstrate how Hg concentration shifted by the advection or/and diffusion in tree rings.The modeling results showed that the advection induced radial translocation during the young growth period of tree was a plausible mechanism to result in the tree-ring Hg record largely different from the trend of anthropogenic Hg emissions in Chongqing.We finally suggest that in further Hg dendrochemistry,better discarding the tree-ring Hg profile of the young growth period to reduce impacts of the radial translocation and age effect.

关键词： Masson pine Tree-ring mercury Radial translocation Tree age effect

二甲双胍治疗与结核病发病的两样本孟德尔随机化分析

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中国防痨杂志 2024年第7期46卷 785-791页

作者：李婷婷王龙智刘欢庆西安市胸科医院药物临床试验机构办公室西安710100 西北工业大学信息化管理处西安710072

目的:以孟德尔随机化方法探讨二甲双胍治疗与结核病发病之间的关系。方法:以二甲双胍治疗作为暴露变量、以结核病发病作为结局变量搜索MR Base在线数据库(http://***),使用一组公开可用的全基因组关联研究(GWAS)对数据进行汇总,并采用... 详细信息

目的:以孟德尔随机化方法探讨二甲双胍治疗与结核病发病之间的关系。方法:以二甲双胍治疗作为暴露变量、以结核病发病作为结局变量搜索MR Base在线数据库(http://***),使用一组公开可用的全基因组关联研究(GWAS)对数据进行汇总,并采用逆方差加权(IVW)、加权中位数和MR-Egger回归分析两个样本(二甲双胍治疗样本:462933例,病例组:11552例,对照组:451381例;结核病发病样本:212453例,病例组:549例,对照组:211904例)的孟德尔随机化关联性,采用Cochran’s Q统计量和I2统计量评价单核苷酸多态性(SNP)之间的异质性。采用“留一法”敏感性分析和漏斗图验证结果的可靠性。结果:从GWAS中筛选出40个在全基因组水平上与二甲双胍治疗显著相关的独立的SNP作为工具变量,168个与结核病发病显著相关的独立的SNP。逆方差加权分析显示,二甲双胍治疗与结核病发病之间存在显著的正相关性(P=0.022);MR-Egger回归分析发现,定向多效性不太可能影响结果(截距=-0.043,P=0.394),没有证据表明二甲双胍治疗与结核病发病之间存在直接关联性(P=0.150);但加权中位数方法分析支持二甲双胍治疗与结核病发病之间存在正相关性(P=0.010)。逆方差加权和MR-Egger分析均未发现异质性(Q=46.890,I2=0.168,P=0.175;Q=45.990,I2=0.174,P=0.181),增加了孟德尔随机化分析估计的可靠性。“留一法”敏感性分析发现,孟德尔随机化整体估计结果稳定,没有出现显著偏差,结果具有可靠性。漏斗图也未显示不对称,不存在定向多效性,支持结果的稳健可靠。结论:经异质性和敏感性检验,通过逆方差加权、加权中位数和MR-Egger回归3种分析方法获得的孟德尔随机化结果支持二甲双胍治疗与结核病发病风险之间的正相关性。

关键词：二甲双胍结核统计学(主题) 孟德尔随机化

Pushing the boundaries: an interview with Dae-Hyun Kim on terahertz devices

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National Science Review 2024年第3期11卷 42-45页

作者： Defu wang the Center for Carbon-based Electronics School of Electronics Peking University

Ⅲ–Ⅴ compound semiconductors, such as InGaAs/InAlAs, exhibit exceptional carrier transport properties, establishing them as fundamental elements in terahertz(THz) applications crucial for the development of 6G netwo...

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Enrichment of anammox biomass during mainstream wastewater treatment driven by achievement of partial denitrification through the addition of bio-carriers

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Journal of Environmental Sciences 2024年第3期137卷 181-194页

作者： Yuqing Ma Bo wang Xiaodi Li Shuo wang Wen wang Yongzhen Peng National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Engineering Research Center of BeijingBeijing University of TechnologyBeijing 100124China

Anammox is widely considered as the most cost-effective and sustainable process for nitrogen removal.However,how to achieve the enrichment of anammox biomass remains a challenge for its large-scale application,especially in mainstream wastewater treatment.In this study,the feasibility of enrichment of anammox biomass was explored through the realization of partial denitrification and the addition of bio-carriers.By using ordinary activated sludge,a sequencing batch reactor(SBR)followed by an up-fow anaerobic sludge bed(UASB)was operated at 25±2℃ for 214 days.The long-term operation was divided into five phases,in which SBR and UASB were started-up in Phases I and II,respectively.By eliminating oxygen and adjusting the infow ratios in Phases III-V,advanced nitrogen removal was achieved with the effuent total nitrogen being 4.7 mg/L and the nitrogen removal efficiency being 90.5%in Phase V.Both in-situ and ex-situ activity tests demonstrated the occurrence of partial denitrification and anammox.Moreover,16S rRNA high-throughput sequencing analysis revealed that Candidatus Brocadia was enriched from below the detection limit to in biofilms(0.4%in SBR,2.2%in UASB)and the foc sludge(0.2%in SBR,1.3%in UASB),while Thauera was mainly detected in the foc sludge(8.1%in SBR,8.8%in UASB),which might play a key role in partial denitrification.Overall,this study provides a novel strategy to enrich anammox biomass driven by rapid achievement of partial denitrification through the addition of bio-carriers,which will improve large-scale application of anammox processes in mainstream wastewater treatment.

关键词： Enrichment Anammox biomass Bio-carriers Partial denitrification Mainstream wastewater

Performance and mechanism of La-Fe metal-organic framework as a highly efficient adsorbent for fluoride removal from mine water

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Journal of Environmental Sciences 2024年第5期139卷 245-257页

作者： Chaomin Jia Jianbing wang Huijiao wang Sichao Zhu Xiaohui Zhang Yuxiang wang School of Chemical&Environmental Engineering China University of Mining&Technology-BeijingBeijing 100083China Beijing Polytechnic Beijing 100176China Chinese Society for Urban Studies Beijing 100835China

Water fluoride pollution has caused non-negligible harm to the environment and humans,and thus it is crucial to find a suitable treatment technology.In this study,La-Fe@PTA adsorbent was synthesized for the defluoridation of mine water.The results showed that the optimum conditions for defluoridation by La-Fe@PTA were p H close to 7.0,the initial F-concentration of 10 mg/L,the dosage of 0.5 g/L and the adsorption time of 240 min.Compared with SO_4^(2-),Cl^(-),NO_(3)^(-),Ca^(2+)and Mg^(2+),CO_(3)^(2-)and HCO_(3)^(-)presented severer inhibition on fluoride uptake by La-Fe@PTA.The adsorption process fits well with the pseudo-second-order kinetic model and Freundlich model,and the maximum adsorption capacity of Langmuir model was 95 mg/g.Fixed-bed adsorption results indicated that fluoride in practical fluorinated mine water could be effectively removed from 3.6 mg/L to less than 1.5 mg/L within130 bed volume(BV)by using 1.5 g La-Fe@PTA.Furthermore,the adsorbent still had good adsorption capacity after regeneration,which confirms the great application potential of La-Fe@PTA as a fluoride ion adsorbent.The mechanism analysis showed that La-Fe@PTA adsorption of fluorine ions is a physicochemical reaction driven by electrostatic attraction and ion exchange.

关键词： Adsorption La-Fe@PTA Fluoride ion Mine water Mechanism

Analysis of Hot Topics Regarding Global Smart Elderly Care Research—1997-2021

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China CDC weekly 2024年第9期6卷 157-161页

作者： Hongman wang Hong Chen Yuqi wang School of Health Humanities Peking UniversityBeijingChina Center for Global Public Health Chinese Center for Disease Control and PreventionBeijingChina

Summary What is already known about this topic?With the assistance of the internet,big data,cloud computing,and other technologies,the concept of smart elderly care has emerged.What is added by this report?This study presents information on the countries or regions that have conducted research on smart elderly care,as well as identifies global hotspots and development trends in this field.

关键词： Smart internet smart