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Adaptive observer-based integral event-triggered antivibration control of a full aircraft active landing gear system with irregular runway excitations

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Science China(Information Sciences) 2024年第6期67卷 248-261页

作者： Wenxiao HU Chenglong DU Fanbiao LI Xinmin CHEN Chunhua YANG Weihua gui School of Automation Central South University Research Center in System Engineering for Special Aircrafts Ningbo Institute of Materials Technology and EngineeringChinese Academy of Sciences

This study addresses the antivibration issue of a full aircraft active landing gear system(LGS)under landing impact and runway excitations via a novel adaptive observer-based integral event-triggered control method. First, a full aircraft active LGS comprising a front gear and two synchronized main left and right gears with active suspensions is established, where the information exchange among them is not implemented directly. Second, two adaptive observers are designed separately for the front and main LGSs to identify the varying damping parameters and estimate the system states simultaneously. Third, estimated states are transmitted to a shared network through a novel integral event-triggered mechanism(I-ETM);thus, the front and main LGSs are interconnected, and a networked control scheme for the aircraft LGS is constructed. Additionally, the integrated active control law is designed with the aid of the transmitted states of the front and main LGSs, enhancing the robustness against the pitch vibration of the ***, the L2-stability of the hybrid system is guaranteed to depress the vertical vibration effect of the landing impact and irregular runway excitations, thus improving passenger safety and comfort. Moreover,a codesign method is provided to obtain feasible solutions to the gain matrices of the observers and controllers simultaneously. Simulation and comparison results are presented to illustrate the effectiveness and superiority of the proposed control scheme in antivibration and saving communication resources.

关键词： aircraft active landing gear antivibration control integral event-triggered mechanism adaptive observer ${\mathcal{L}}_2$-stability

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以科学发展观为统领全面加强资源勘查类专业应用型人才培养

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宿州学院学报 2007年第4期22卷 1-4页

作者：桂和荣马艳平宿州学院地理与环境科学系安徽宿州234000

资源勘查工作是经济社会发展中最重要的先行性、基础性工作。在资源勘查类专业人才奇缺的新形势下,全面加强资源勘查类专业应用型人才培养具有重要的现实意义和战略意义。本文客观分析了资源勘查类专业发展的历史过程和当今资源勘查事... 详细信息

资源勘查工作是经济社会发展中最重要的先行性、基础性工作。在资源勘查类专业人才奇缺的新形势下,全面加强资源勘查类专业应用型人才培养具有重要的现实意义和战略意义。本文客观分析了资源勘查类专业发展的历史过程和当今资源勘查事业对人才的需求特点,指出了现阶段加强资源勘查类专业人才培养的机遇与挑战,提出了在科学发展观指引下开展专业人才培养模式改革的基本思路;以构建专业群为出发点,加强资源勘查类专业建设;以培养专业核心能力为关键,加强课程建设以及教材、师资、实习实训基地建设。以就业为导向,以服务为宗旨,培养适应国家需要的高素质应用型资源勘查类专业人才。

关键词：资源劫查类专业人才培养模式专业群建设课程整合应用型人才培养

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宿南矿区不同时期塌陷塘水环境质量评价

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中国煤炭地质 2019年第3期31卷 45-52页

作者：夏玉婷桂和荣李俊安徽理工大学地球与环境学院安徽淮南232000 国家煤矿防治工程技术研究中心(宿州学院) 安徽宿州234000

以宿南矿区不同时期形成的采煤塌陷塘(芦岭塘、朱仙庄#1塘和#2塘)为研究对象,于2017年先后采集夏季和冬季水样,运用piper三线图、相关性分析、改进模糊综合评价法等,对其水环境质量进行分析评价与比较,得到以下结论:①芦岭塘、朱仙庄#1... 详细信息

以宿南矿区不同时期形成的采煤塌陷塘(芦岭塘、朱仙庄#1塘和#2塘)为研究对象,于2017年先后采集夏季和冬季水样,运用piper三线图、相关性分析、改进模糊综合评价法等,对其水环境质量进行分析评价与比较,得到以下结论:①芦岭塘、朱仙庄#1塘夏、冬两季水化学类型均为HCO_3―Na·Mg型,朱仙庄#2塘为SO_4―Na·Mg·Ca型。②三个塌陷塘水的TDS、pH、EC变化趋势为朱仙庄#1塘>朱仙庄#2塘>芦岭塘,其季节变化趋势均为夏季>冬季; ORP变化趋势为朱仙庄#2塘>芦岭塘>朱仙庄#1塘,其季节性变化趋势为冬季>夏季。③改进的模糊综合评价结果表明,三个塌陷塘夏季水质较差,主要受人为污染影响;冬季芦岭塘、朱仙庄#1塘水质良好,受污染小;朱仙庄#2塘冬季水质与夏季相近,均较差,主要受投加鱼食料的影响。

关键词：采煤塌陷塘水环境质量改进模糊综合评价污染评价

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Preface to Special Topic on Integrated Circuits, Technologies and Applications

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Journal of Semiconductors 2024年第6期45卷 1-2页

作者： Zheng Wang Xiaoyan gui Lin Cheng Nanjian Wu School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China School of Microelectronics Xi’an Jiaotong UniversityXi’an 710049China School of Microelectronics University of Science and Technology of ChinaHefei 230026China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China

This Special Topic of the Journal of Semiconductors(JoS)features expanded versions of key articles presented at the 2023 IEEE International Conference on Integrated Circuits Technologies and Applications(ICTA),which was held in Hefei,Anhui,China,from October 27 to 29,*** ICTA is an IEEE flagship conference in the field of integrated circuits(IC)in China,which provides a communication platform for sharing the state-of-the-art techniques from experts in the field of *** the 93 papers presented at ICTA 2023,the Technical Program Committee and the Award Committee have selected 4 high-quality articles to recommend to the Special Topic of JoS,covering a wide range of technical fields,including one paper on RF ICs,two papers on Analog ICs and one paper on Wireline ICs.

关键词： communication ICT Anhui

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宿州市城市景区水域底泥重金属含量特征及生态风险评价

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环境化学 2021年第8期40卷 2410-2418页

作者：江雅琪桂和荣陈晨王春雷余浩陈家玉李晨安徽理工大学地球与环境学院淮南232001 国家煤矿水害防治工程技术研究中心(宿州学院) 宿州234000

城市景区水域是城市水环境的重要组成部分,但关于城市景区水域底泥重金属的研究相对较少。因此,本文在宿州市三角洲公园水域采集底泥,测定了其中8种重金属元素(Pb、U、V、Mn、Ni、Cr、Cu和Zn)的含量,并利用自组织神经网络(SOM)、相关性... 详细信息

城市景区水域是城市水环境的重要组成部分,但关于城市景区水域底泥重金属的研究相对较少。因此,本文在宿州市三角洲公园水域采集底泥,测定了其中8种重金属元素(Pb、U、V、Mn、Ni、Cr、Cu和Zn)的含量,并利用自组织神经网络(SOM)、相关性分析、聚类分析、对研究区重金属的空间分布、污染水平及来源进行研究。结果表明,位于公园外的采样点重金属含量大于公园内部采样点;潜在生态风险指数法及地累积指数评价结果显示,三角洲公园水域底泥处在较轻的污染状态;通过正定矩阵分解模型(PMF)解析出3种污染因子,包括农业源、工业源和自然源,其中农业源及工业源为研究区沉积物中重金属的主要来源。

关键词：沉积物城市水域重金属分布特征生态风险源解析宿州市

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Thermal fatigue and wear of compacted graphite iron brake discs with various thermomechanical properties

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China Foundry 2024年第3期21卷 248-256页

作者： gui-quan Wang Zhuo Xu Zhong-li Liu Xiang Chen Yan-xiang Li School of Nuclear Equipment and Nuclear Engineering Yantai UniversityYantai 264005ShandongChina School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Key Laboratory for Advanced Materials Processing Technology Ministry of EducationBeijing 100084China

The increase in payload capacity of trucks has heightened the demand for cost-effective yet high performance brake *** this work,the thermal fatigue and wear of compacted graphite iron brake discs were investigated,aiming to provide an experimental foundation for achieving a balance between their thermal and mechanical *** graphite iron brake discs with different tensile strengths,macrohardnesses,specific heat capacities and thermal diffusion coefficients were produced by changing the proportion and strength of *** peak temperature,pressure load and friction coefficient of compacted graphite iron brake discs were analyzed through inertia friction *** morphology of thermal cracks and 3D profiles of the worn surfaces were also *** is found that the thermal fatigue of compacted graphite iron discs is determined by their thermal properties.A compacted graphite iron with the highest specific heat capacity and thermal diffusion coefficient exhibits optimal thermal fatigue *** of the matrix at low temperatures significantly weakens the function of alloy strengthening in hindering the propagation of thermal *** the reduced hardness,increasing the ferrite proportion can mitigate wear loss resulting from low disc temperatures and the absence of abrasive wear.

关键词： compacted graphite iron brake disc thermomechanical properties thermal fatigue wear

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Optimization of territorial space layout in China

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Journal of Geographical Sciences 2024年第9期34卷 1719-1738页

作者： DONG Yin JIN gui DENG Xiangzheng Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education Fujian Normal UniversityFuzhou 350007China School of Geographical Sciences Fujian Normal UniversityFuzhou 350007China School of Economics and Management China University of GeosciencesWuhan 430079China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 101408China

The evolution of territorial space is intrinsically linked to economic growth, societal welfare, and ecological preservation. In the context of escalating spatial conflicts and stringent resource limitations, resource efficiency has emerged as a fundamental pillar for the scientific optimization of territorial space layout. Drawing upon resource efficiency metrics from cities nationwide, this study constructs scenarios for territorial space development and conservation, assesses developmental capacity under varying preferences, and subsequently delineates strategic blueprints using an integrated “point-axis-area” approach. The findings reveal the following:(1) Resource efficiency in China has witnessed a consistent uptick, yet remains modest overall, with marked regional disparities.(2) Throughout the investigation period, developmental capacity has seen progressive enhancement, with a pronounced capacity in scenarios favoring development, radiating axially from urban conglomerates.(3) The layout of pivotal points and developmental axes has transitioned from a “tri-pillar” to a diamond configuration, with the coastal corridor, Harbin-Beijing-Guangzhou corridor, and the corridor along the Yangtze River standing out.(4) Strategic points progressively converge along key axes, whereas dominant regions exhibit clear differentiation on either side of the Hu Huanyong Line. By integrating elements of the territorial spatial structure,this paper proposes blueprints for “five horizontal and three vertical zones with eight cores and three areas,” “four horizontal and three vertical zones with six cores and three areas,”and “three horizontal and four vertical zones with five cores and three areas,” corresponding to scenarios of prioritizing development, status quo maintenance, and prioritizing conservation, respectively. The outcomes of this research offer a technical foundation and theoretical guidance for the pursuit of high-quality territorial space development and a vision

关键词： territorial space resource efficiency development and conservation developmental capacity territorial space blueprints China

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区域注浆扰动下渗流场−化学场演化及耦合作用

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煤炭科学技术 2023年第7期51卷 152-166页

作者：郭艳桂和荣魏久传胡满聪郭祥东聂锋陈永青解建叶爽李俊国家煤矿水害防治工程技术研究中心(宿州学院) 安徽宿州234000 山东科技大学地球科学与工程学院山东青岛266590 矿井水资源化利用安徽普通高校重点实验室安徽宿州234000 淮北矿业股份有限公司安徽淮北235000 安徽恒源煤电股份有限公司安徽宿州234000

在淮北煤田普遍采用地面定向钻高压注浆技术治理煤系底板岩溶水害。注浆后渗流场补径排路径发生变化,且注浆实施中注浆高压以及浆液析水会在一定时期内改变受注目标含水层地下水渗流场和化学场的分布特征。以淮北煤田桃园煤矿为研究对象... 详细信息

在淮北煤田普遍采用地面定向钻高压注浆技术治理煤系底板岩溶水害。注浆后渗流场补径排路径发生变化,且注浆实施中注浆高压以及浆液析水会在一定时期内改变受注目标含水层地下水渗流场和化学场的分布特征。以淮北煤田桃园煤矿为研究对象,利用Feflow软件,构建了区域注浆扰动下目标层渗流场与化学场(简称“双场”)演化模型,探讨了“双场”耦合机制,选择受环境影响较小的Cl−为模拟因子,开展了“双场”耦合作用下溶质运移影响因素分析,在此基础上构建了区域注浆扰动下溶质扩散预测模型。研究结果表明:识别验证后渗流场模型中,模拟水位与实测水位误差小于3 m的点占71.9%,模拟效果较好;识别验证后化学场模型中,Ⅱ4采区溶质运移模拟效果较好,Ⅱ1采区模拟值偏低约14.4 mg/L,误差约为实际值的6.6%,低于10%,总体模拟效果较好。渗透系数相对较大的Ⅱ4采区和Ⅱ2采区Cl−较容易运移扩散;而渗透系数较小的Ⅱ1采区岩石致密,渗透性较差,模型运行50 a期间,其基本以“滞水”状态存在。基于注浆扰动下Ⅱ4采区局部渗流场演化特征,认为溶质运移主要受渗透系数、弥散度、水力梯度、渗透流速、注浆时间、浆液相对密度等参数控制,并发现在注浆结束后18~22 a Cl−质量浓度达到峰值,随后Cl−质量浓度开始降低,约在40 a后达到区域注浆之前的平衡状态。基于多次设参运行获得数据,建立了“双场”耦合作用下溶质扩散的预测模型,误差率小于10%的数据占比达81.4%,说明所建立的溶质扩散预测模型基本可靠。研究可为区域注浆扰动下受注目标含水层水环境演化研究以及煤矿水害预测预警提供科学依据,具有重要的理论和实践意义。

关键词：区域注浆扰动渗流场−化学场耦合模型溶质运移数值模拟底板水害

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粉煤灰中污染离子淋释试验及其运移模型

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煤田地质与勘探 1999年第1期27卷 48-51页

作者：许光泉桂和荣黄文辉李禄荣淮南工学院中国地质大学

通过对不同介质条件下粉煤灰中污染离子的淋释实验，得出一些离子淋释规律，在此基础上，对粉煤灰中淋释污染离子在地下水中的浓度变化从理论上给出两种数学模型。

关键词：粉煤灰污染运移数学模型离子淋释地下水

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InSAR-derived surface deformation characteristics and mining subsidence parameters in mountain coal mines

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Journal of Mountain Science 2024年第9期21卷 3139-3156页

作者： JIANG Xiaowei SHI Wenbing LIANG Feng gui Jingjing LI Jiawei Key Laboratory of Karst Georesources and Environment Ministry of EducationGuizhou UniversityGuiyang 550025China College of Resources and Environmental Engineering Guizhou UniversityGuiyang 550025China Mountain Geohazard Prevention R&D Center of guizhou Province Guiyang 550025China

Mining-induced surface deformation disrupts ecological balance and impedes economic *** study employs SBAS-InSAR with 107-view of ascending and descending SAR data from Sentinel-1,spanning February 2017 to September 2020,to monitor surface deformation in the Fa’er Coal Mine,guizhou *** on the surface deformation time series reveals the relationship between underground mining and surface *** geological conditions,mining activities,duration,and ranges,the study determines surface movement parameters for the coal *** asserts that mining depth significantly influences surface movement parameters in mountainous mining *** mining depth elevates the strike movement angle on the deeper side of the burial depth by 22.84°,while decreasing by 7.74°on the shallower *** movement angles decrease by 4.06°,while downhill movement angles increase by 15.71°.This emphasizes the technology's suitability for local mining design,which lays the groundwork for resource development,disaster prevention,and ecological protection in analogous contexts.

关键词： Time-series InSAR Surface deformation Subsurface mining Mining subsidence

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