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Dynamic Event-Triggered Quadratic Nonfragile Filtering for Non-Gaussian Systems:Tackling Multiplicative Noises and Missing Measurements

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1127-1138页

作者： Shaoying wang Zidong wang Hongli Dong Yun Chen Guoping Lu College of Science Shandong University of AeronauticsBinzhou 256603China College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590 Department of Computer Science Brunel University LondonUxbridge UB83PHUK Artificial Intelligence Energy Research Institute Northeast Petroleum UniversityDaqing 163318 Heilongjiang provincial Key Laboratory of Networking and Intelligent Control Northeast Petroleum UniversityDaqing 163318China School of Automation Hangzhou Dianzi UniversityHangzhou 310018China School of Electrical Engineering Nantong UniversityNantong 226019China

This paper focuses on the quadratic nonfragile filtering problem for linear non-Gaussian systems under multiplicative noises,multiple missing measurements as well as the dynamic event-triggered transmission *** multiple missing measurements are characterized through random variables that obey some given probability distributions,and thresholds of the dynamic event-triggered scheme can be adjusted dynamically via an auxiliary *** attention is concentrated on designing a dynamic event-triggered quadratic nonfragile filter in the well-known minimum-variance *** this end,the original system is first augmented by stacking its state/measurement vectors together with second-order Kronecker powers,thus the original design issue is reformulated as that of the augmented ***,we analyze statistical properties of augmented noises as well as high-order moments of certain random *** the aid of two well-defined matrix difference equations,we not only obtain upper bounds on filtering error covariances,but also minimize those bounds via carefully designing gain ***,an example is presented to explain the effectiveness of this newly established quadratic filtering algorithm.

关键词： filtering quadratic bounds

Ca(OH)_(2.脱水过程数值研究及强化

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工程热物理学报 2024年第1期45卷 143-151页

作者：张严心王梦祎陈黎周宇昊陶文铨西安交通大学热流科学与工程教育部重点实验室西安710049 华电电力科学研究院有限公司杭州310030

建立了Ca(OH)_(2./CaO反应器脱水过程的多孔介质流动换热模型,对Ca(OH)_(2./CaO热化学储能系统的脱水过程进行了三维数值模拟研究,分析了储能系统在脱水过程中温度、反应物浓度的动态变化,并针对该反应系统设计了一系列强化传热传质措施... 详细信息

建立了Ca(OH)_(2./CaO反应器脱水过程的多孔介质流动换热模型,对Ca(OH)_(2./CaO热化学储能系统的脱水过程进行了三维数值模拟研究,分析了储能系统在脱水过程中温度、反应物浓度的动态变化,并针对该反应系统设计了一系列强化传热传质措施,通过增加多种类型翅片、添加多孔通道及金属板、改变反应器高径比、采用圆台型反应器来强化传热及传质,分析了各种工况下储能系统的温度、压力变化情况。结果表明:添加翅片有利于强化反应器的传热性能,提高脱水过程速率;添加多孔通道一方面可以强化传热,另一方面多孔结构可以作为水蒸气的扩散通道,减小水蒸气扩散阻力,强化传质;在孔隙率不变的前提下,增大反应器高径比会强化反应器的传热性能,但是会增加水蒸气扩散阻力。改变反应器高径比会对反应器传热及传质性能产生影响;采用圆台型反应器时,其脱水反应的快慢取决于反应器最大截面处的反应速率大小。相比于传质,传热对圆台反应器的脱水过程起主要影响;对于研究尺寸下的反应器,强化传热对反应系统性能的提升作用优于强化传质。研究结果可为热化学储能反应器的结构优化与性能提升提供一定的参考价值。

关键词：热化学储能 Ca(OH)_(2./CaO 多孔介质翅片多孔通道

Nonlinear Filtering With Sample-Based Approximation Under Constrained Communication:progress, Insights and Trends

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IEEE/CAA Journal of Automatica Sinica 2024年第07期11卷 1539-1556页

作者： Weihao Song Zidong wang Zhongkui Li Jianan wang Qing-Long Han IEEE the State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering ScienceCollege of Engineering Peking University the Department of Computer Science Brunel University London the School of Aerospace Engineering Beijing Institute of Technology the School of Science Computing and Engineering Technologies Swinburne University of Technology

The nonlinear filtering problem has enduringly been an active research topic in both academia and industry due to its ever-growing theoretical importance and practical *** main objective of nonlinear filtering is to infer the states of a nonlinear dynamical system of interest based on the available noisy measurements. In recent years, the advance of network communication technology has not only popularized the networked systems with apparent advantages in terms of installation,cost and maintenance, but also brought about a series of challenges to the design of nonlinear filtering algorithms, among which the communication constraint has been recognized as a dominating concern. In this context, a great number of investigations have been launched towards the networked nonlinear filtering problem with communication constraints, and many samplebased nonlinear filters have been developed to deal with the highly nonlinear and/or non-Gaussian scenarios. The aim of this paper is to provide a timely survey about the recent advances on the sample-based networked nonlinear filtering problem from the perspective of communication constraints. More specifically, we first review three important families of sample-based filtering methods known as the unscented Kalman filter, particle filter,and maximum correntropy filter. Then, the latest developments are surveyed with stress on the topics regarding incomplete/imperfect information, limited resources and cyber ***, several challenges and open problems are highlighted to shed some lights on the possible trends of future research in this realm.

关键词： Communication constraints maximum correntropy filter networked nonlinear filtering particle filter sample-based approximation unscented Kalman filter

Estimating Radon Flux and Environmental Radiation Dose from Decommisioning Uranium Mill Tailings and Mining Debris

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Journal of Earth Science 1998年第3期17卷 68-72页

作者： Xu Lechang Research Institute of Uranium Mining, CNNC, Hengyang 42.001 wang yanxin Faculty of Engineering,{2. university of geosciences, Wuhan 430074 Dai Xingye Mine No.765, CNNC, Lincang 677009

Based on a case study on uranium mine No.765 of china National Nuclear Corporation (CNNC), the paper briefly describes disposal program and effect of decommissioning uranium mine/mill facilities and quantitatively evaluates radon fluxes and doses to man of gaseous airborne pathway from mill tailings and mining debris before and after decommissioning, including annual individual effective dose to critical groups and annual collective effective dose to the population within 80 km region of the facilities.

关键词： uranium mill tailings uranium mining debris radon flux dose.

Circular polarization-selective optical,photothermal,and optofluidic effects in chiral metasurfaces

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photonics Research 2024年第2期12卷 331-340页

作者： CUIpING MA pENG YU ZHIMIN JING YISONG ZHU pEIHANG LI WENHAO wang HONGXING XU YANNING ZHANG LIANG pAN TAE-YOUL CHOI ARUp NEOGI alexander OGOVOROV ZHIMING wang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Division of physics and Applied physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore School of physics and Technology Center for Nanoscience and NanotechnologyWuhan UniversityWuhan 430072China Department of Mechanical Engineering University of North TexasDentonTexas 76207USA Department of physics and Astronomy and Nanoscale and Quantum phenomena Institute Ohio UniversityAthensOhio 45701USA

Circular dichroism (CD) is extensively used in various material systems for applications including biological detection,enantioselective catalysis,and chiral *** paper introduces a chiral absorptive metasurface that exhibits a circular polarization-selective effect in dual bands-positive and negative CD peaks at short wavelengths and long wavelengths,***,we uncover that this phenomenon extends beyond the far-field optical response,as it is also observed in the photothermal effect and the dynamics of thermally induced fluid *** carefully engineering the metasurface design,we achieve two distinct CD signals with high g factors (1) at the wavelengths of 877 nm and 1045 nm,*** findings presented in this study advance our comprehension of CD and offer promising prospects for enhancing chiral light–matter interactions in the domains of nanophotonics and optofluidics.

关键词： chiral catalysis circular

SIMULATION OF SUBSIDENCE IN DIFFERENT COMpRESSIBLE LAYERS DUE TO GROUNDWATER WITHDRAWAL IN TAIYUAN,SHANXI,china

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SIMULATION OF SUBSIDENCE IN DIFFERENT COMPRESSIBLE LAYERS DU...

Multi-omic Analyses Shed Light on The Genetic Control of High-altitude Adaptation in Sheep

第七届国际地面沉降学术研讨会

作者： Ma Rui wang yanxin Yan Chunmiao Ma Teng School of Environmental Studies {2. university of geosciences Wuhan 430074 {2.

＜正＞When layered monitoring data of land subsidence is unavailable,determining the horizontal distribution of compression of each compressible layer is important for spatial planning of groundwater *** has been well known that distribution of clay interbeds in formations has great effect on the spatio-temporal pattern of land subsidence,but little has been known about the heterogeneous compression in each layer caused by non-uniform distribution of clay *** serious land subsidence has occurred due to excessive pumping of groundwater in Taiyuan City,Shanxi province,*** it is impossible to stop drawing groundwater to control land subsidence in *** best choice is to adjust spatial arrangement of pumping wells,based on thorough investigation about compression behavior of each compressible layer. In this paper,a modular subroutine of MODFLOW called Interbed Storage package-1 was employed to simulate the horizontal distribution of subsidence in different compressible layers in Taiyuan *** results show that clay layer 3,clay layer 1 and 2.and clay layer 4,5,6,and 7 contribute chiefly to the land subsidence in Xizhang sub-zone,Wanbolin and Xiayuan sub-zones,and Wujiabao and Xiaodian sub-zones, *** is suggested that both temporal and spatial arrangement of pumping wells must be taken into account to control land subsidence in *** from middle water-bearing zone in Xizhang sub-zone and from the lower water-beating layer in Wujiabao and Xiaodian sub-zones should be avoided.

关键词： Taiyuan city land subsidence simulation optimization compressible layer

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Genomics, proteomics & Bioinformatics 2024年第2期22卷 43-56页

作者： Chao Li Bingchun Chen Suo Langda peng pu Xiaojia Zhu Shiwei Zhou peter Kalds Ke Zhang Meenu Bhati alexander Leonard Shuhong Huang Ran Li Awang Cuoji Xiran wang Haolin Zhu Yujiang Wu Renqin Cuomu Ba Gui Ming Li Yutao wang Yan Li Wenwen Fang Ting Jia Tianchun pu Xiangyu pan Yudong Cai Chong He Liming wang Yu Jiang Jian-Lin Han Yulin Chen ping Zhou Hubert pausch Xiaolong wang International Joint Agriculture Research Center for Animal Bio-Breeding Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal GeneticsBreeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China Animal Genomics ETH ZürichZürich 8092Switzerland Institute of Animal Science Tibet Academy of Agricultural and Animal Husbandry SciencesLhasa 850009China School of Biological and pharmaceutical Engineering Lanzhou Jiaotong UniversityLanzhou 730070China College of Life Sciences Shaanxi Normal UniversityXi’an 710119China Zoology and Evolutionary Biology Department of BiologyUniversity of Konstanz78457 KonstanzGermany College of Life and Geographic Sciences Kashi UniversityKashi 844000China Beijing Key Laboratory of Captive Wildlife Technologies Beijing ZooBeijing 100044China Department of Medical Research Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China Key Laboratory of Agricultural Internet of Things Ministry of Agriculture and Rural Affairs/Shaanxi Key Laboratory of Agricultural Information Perception and Intelligent ServiceCollege of Information EngineeringNorthwest A&F UniversityYangling 712100China Institute of Animal Husbandry and Veterinary Medicine Xinjiang Academy of Agricultural and Reclamation SciencesShihezi 832000China State Key Laboratory of Sheep Genetic Improvement and Healthy production Xinjiang Academy of Agricultural and Reclamation SciencesShihezi 832000China CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources Institute of Animal ScienceChinese Academy of Agricultural SciencesBeijing 100193China Livestock Genetics program International Livestock Research InstituteNairobi 00100Kenya

Sheep were domesticated in the Fertile Crescent and then spread globally,where they have been encountering various environmental *** Tibetan sheep has adapted to high altitudes on the Qinghai-Tibet plateau over the past 3000 *** explore genomic variants associated with high-altitude adaptation in Tibetan sheep,we analyzed Illumina short-reads of 994 whole genomes representing∼60 sheep breeds/populations at varied altitudes,pacBio High fidelity(HiFi)reads of 13 breeds,and 96 transcriptomes from 12.sheep *** testing between the inhabited altitudes and 34,2.8,967 variants was conducted to investigate the genetic architecture of altitude *** accurate HiFi reads were used to complement the current ovine reference assembly at the most significantly associatedβ-globin locus and to validate the presence of two haplotypes A and B among 13 sheep *** haplotype A carried two homologous gene clusters:(1)HBE1,HBE2.HBB-like,and HBBC,and(2.HBE1-like,HBE2.like,HBB-like,and HBB;while the haplotype B lacked the first *** high-altitude sheep showed highly frequent or nearly fixed haplotype A,while the low-altitude sheep dominated by haplotype *** further demonstrated that sheep with haplotype A had an increased hemoglobin–O2.affinity compared with those carrying haplotype *** highly associated genomic region contained the EGLN1 gene which showed varied expression between high-altitude and low-altitude *** results provide evidence that the rapid adaptive evolution of advantageous alleles play an important role in facilitating the environmental adaptation of Tibetan sheep.

关键词： Environmental adaptation High altitude Hypoxia Selection signature Sheep

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地热区深部碳的地球化学研究综述

岩石学报 2024年第7期40卷 2255-2266页

作者：李长正郑国东郭清海楠本成寿王焰新中国地质大学(武汉)环境学院地下水质与健康教育部重点实验室武汉430074 京都大学理学研究科地球热学研究所别府874-090

碳是地热流体中普遍存在而且非常活跃的生命元素。自地幔源区释放的深部碳运移至近地表的过程中,碳元素有可能记录了许多源区信息以及混合分馏过程的特征,尤其是在地热分布区。因此,与地热区深部碳释放相关的地球化学研究对联系岩浆热... 详细信息

碳是地热流体中普遍存在而且非常活跃的生命元素。自地幔源区释放的深部碳运移至近地表的过程中,碳元素有可能记录了许多源区信息以及混合分馏过程的特征,尤其是在地热分布区。因此,与地热区深部碳释放相关的地球化学研究对联系岩浆热源型地热系统深部热源和浅部高温流体的物质交换和运移以及准确判断地热地质背景等都具有非常重要的意义。目前,国内外学者对加深地热流体挥发分来源的定量研究以及完善地热区同位素分馏理论等方面都做出了许多探索性的尝试,其中对来自深部的碳元素的研究是最重要的课题之一。对深部碳俯冲循环过程与地幔源区非均一性特征,地热区岩浆脱气、方解石沉淀、气体溶解脱气的分馏特点、围岩变质脱气与土壤碳的混合过程及其规律等的系统分析结果显示,深部碳的释放经历了复杂的地球化学过程。由于单一方法的研究难以全面揭示该过程,本文通过对该领域相关研究方法的梳理和融合,结合地热区深部碳释放的规模和方式的总结,以期为地热系统物质运移规律和地热流体碳来源的定量研究提供参考和支撑,促进对深部碳循环过程及其气候环境效应的把握和认识。

关键词：深部碳地热流体碳同位素定量研究

设置钢管灌浆阻尼器的RSC双层排架墩抗震性能分析

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震灾防御技术 2024年第2期19卷 355-362页

作者：王严信孙治国李小军王东升防灾科技学院中国地震局建筑物破坏机理与防御重点实验室北京101601 北京工业大学城市建设学部北京100024 河北工业大学土木与交通学院天津300401

为实现双层桥梁排架墩地震损伤控制设计,提出上层排架采用摇摆-自复位(Rocking Self-Centering,RSC)体系、下层排架不摇摆的双层桥梁排架墩设计思路,并采用钢管灌浆阻尼器(Steel-tube Grout Damper,SGD)提升摇摆接缝处的耗能能力。基于O... 详细信息

为实现双层桥梁排架墩地震损伤控制设计,提出上层排架采用摇摆-自复位(Rocking Self-Centering,RSC)体系、下层排架不摇摆的双层桥梁排架墩设计思路,并采用钢管灌浆阻尼器(Steel-tube Grout Damper,SGD)提升摇摆接缝处的耗能能力。基于OpenSees数值分析平台分别建立了SGD和外置SGD的RSC双层排架墩抗震数值分析模型,结合试验结果验证了SGD和RSC排架墩建模方法的准确性。选取7条近断层地震动记录,基于增量动力分析(Incremental Dynamic Analysis,IDA)手段,研究外置SGD的RSC双层排架墩的地震反应。研究结果表明,当pGA为0.1 g时,SGD开始屈服耗能;当pGA为0.4 g时,SGD最大变形为名义极限变形的53.44%,无粘结预应力筋最大应力为名义屈服强度的59.60%;当pGA为0.8 g时,SGD接近拉断,预应力筋最大应力为名义屈服强度的84.78%;与耗能角钢相比,SGD变形及耗能能力更强,在强震作用下更不易发生拉断破坏。

关键词：桥梁抗震双层排架墩钢管灌浆阻尼器摇摆-自复位地震损伤控制增量动力分析