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金沙江上游旭龙水电站库区滑坡堵江及涌浪风险研究

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长江科学院院报 2023年第1期40卷 81-86页

作者：王周萼蔡耀军水利部长江勘测技术研究所武汉430011 长江设计集团有限公司武汉430010

旭龙水电站库区岸坡陡峻,不良地质体发育,为确保水电站正常运行,准确评价不良地质体稳定性和滑坡堵江及涌浪风险至关重要。经工程地质测绘确定库区分布18处不良地质体,均为第四系堆积体,蓄水前稳定,不存在堵江风险。蓄水后有8处堆积体... 详细信息

旭龙水电站库区岸坡陡峻,不良地质体发育,为确保水电站正常运行,准确评价不良地质体稳定性和滑坡堵江及涌浪风险至关重要。经工程地质测绘确定库区分布18处不良地质体,均为第四系堆积体,蓄水前稳定,不存在堵江风险。蓄水后有8处堆积体可能存在变形破坏,其中7处堆积体可能发生塌岸,规模小,不会堵江;16#堆积体可能发生滑坡,规模较大,可能堵江和产生涌浪。利用GeoStudio软件对16#堆积体进行了稳定性分析,采用分析模拟法和潘家铮法对滑坡堵江风险进行了预测,并利用滑坡涌浪经验公式分析了涌浪对滑坡区、水库上下游岸坡和大坝的影响。结果表明,16#堆积体失稳不会造成堵江,滑坡涌浪不会影响大坝安全。研究思路与方法可为金沙江上游相关工程的风险预测提供借鉴。

关键词：堵江风险涌浪风险稳定性评价滑速预测旭龙水电站

enhancing leaching efficiency of ion adsorption rare earths by ameliorating mass transfer effect of rare earth ions by applying an electric field

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Journal of Rare earths 2024年第1期42卷 172-180,I0006页

作者： Lingbo zhou Jie Yang Shijie Kang Xiaojun Wang Hongdong Yu Yinhua Wan Rare earth Institute University of Science and Technology of ChinaHefei230000China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou341000China Jiangxi Institute of Rare earths Chinese Academy of SciencesGanzhou341000China School of Resources and environment engineering Jiangxi University of Science and TechnologyGanzhou341000China

Improving the seepage of leaching solution in the ore body and strengthening the mass transfer process of rare earth ions during in-situ leaching are two critical methods to improve the leaching efficiency of rare *** this study,2 wt%MgSO_(4)solution was used for the indoor simulated column leaching experiment on rare earth samples and an electric field was applied at both ends of the *** the effects of different intensities,initial application time and duration of the electric field on the rare earth leaching system and its mechanism were *** results show that compared with the single MgSO_(4)solution leaching,applying an electric field with a strength of 6 V/cm can save the leaching time of 30 min and increase the flow velocity of the rare earth leachate by 26.98%.Under the optimal conditions of applying an electric field with a strength of 6 V/cm for 20 min to the leaching system after10 min of the rare earth leachate flowing out,the leaching efficiency of sample increases from 81.20% to 86.05% with the increase of 4.85%.The mechanism analysis shows that when a direct current electric field is applied to the rare earth leaching system,rare earth ions rapidly change from disorderly movement with the seepage into faster and directional *** addition,the seepage of the leaching solution is also improved due to the increase of the cross-sectional area of the seepage channel,the polarized water molecules migrate directionally by force from the negative pole,and the movement of the hydrogen is generated by the electrolytic *** impo rtantly,based on the principle of in-situ leaching process,the layout of injection holes and deflector holes in this process provides a natural site for the electrode layout of the electric *** the simple equipme nt and the ope ration,the rare earth leaching process with the applied electric field has high feasibility in industrial application.

关键词： Ion adsorption rare earths Leaching system electric field Mass transfer process Seepage

evolutionary Optimization Methods for High-Dimensional expensive Problems:A Survey

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Ieee/CAA Journal of Automatica Sinica 2024年第5期11卷 1092-1105页

作者： MengChu zhou Meiji Cui Dian Xu Shuwei Zhu Ziyan Zhao Abdullah Abusorrah Department of electrical and Computer engineering New Jersey Institute of TechnologyNewarkNJ 07102 USA School of Information and electronic engineering Zhejiang Gongshang UniversityHangzhou 310018China School of Intelligent Manufacturing Nanjing University of Science and TechnologyNanjing 210094China Institute of Systems engineering Macao University of Science and TechnologyMacao 999078China School of Artificial Intelligence and Computer Jiangnan UniversityWuxi 214122China School of Information Science and engineering Northeastern UniversityShenyang 110819China Center of Research excellence in Renewable energy and Power Systems Department of Electrical and Computer EngineeringFaculty of EngineeringKing Abdulaziz UniversityJeddah 21589Saudi Arabia K.A.CARe energy Research and Innovation Center King Abdulaziz UniversityJeddah 21589Saudi Arabia

evolutionary computation is a rapidly evolving field and the related algorithms have been successfully used to solve various real-world optimization *** past decade has also witnessed their fast progress to solve a class of challenging optimization problems called high-dimensional expensive problems(HePs).The evaluation of their objective fitness requires expensive resource due to their use of time-consuming physical experiments or computer ***,it is hard to traverse the huge search space within reasonable resource as problem dimension *** evolutionary algorithms(eAs)tend to fail to solve HePs competently because they need to conduct many such expensive evaluations before achieving satisfactory *** reduce such evaluations,many novel surrogate-assisted algorithms emerge to cope with HePs in recent *** there lacks a thorough review of the state of the art in this specific and important *** paper provides a comprehensive survey of these evolutionary algorithms for *** start with a brief introduction to the research status and the basic concepts of ***,we present surrogate-assisted evolutionary algorithms for HePs from four main *** also give comparative results of some representative algorithms and application ***,we indicate open challenges and several promising directions to advance the progress in evolutionary optimization algorithms for HePs.

关键词： computer optimization evolutionary

Crack identification in concrete, using digital image correlation and neural network

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Frontiers of Structural and Civil engineering 2024年第4期18卷 536-550页

作者： Jingyi WANG Dong LeI Kaiyang zhou Jintao He Feipeng ZHU Pengxiang BAI College of Mechanics and Materials Hohai UniversityNanjing 211100China

In engineering applications,concrete crack monitoring is very *** methods are of low efficiency,low accuracy,have poor timeliness,and are applicable in only a limited number of ***,more comprehensive detection of concrete damage under different scenarios is of high value for practical engineering *** image correlation(DIC)technology can provide a large amount of experimental data,and neural network(NN)can process very rich ***,NN,including convolutional neural networks(CNN)and back propagation neural networks(BP),can be combined with DIC technology to analyze experimental data of three-point bending of plain concrete and four-point bending of reinforced *** addition,strain parameters can be used for training,and displacement parameters can be added for comprehensive *** data obtained by DIC technology are grouped for training,and the recognition results of NN show that the combination of strain and displacement parameters,i.e.,the response of specimen surface and whole body,can make results more objective and *** identification results obtained by CNN and BP show that these technologies can accurately identify *** identification results for reinforced concrete specimens are less affected by noise than those of plain concrete *** is more convenient because it can identify some features directly from images,recognizing the cracks formed by macro *** can issue early warning of the microscopic cracks,but it requires a large amount of data and *** can be seen that CNN is more intuitive and efficient in image processing,and is suitable when low accuracy is adequate,while BP is suitable for occasions with greater accuracy *** two tools have advantages in different situations,and together they can play an important role in engineering monitoring.

关键词： digital image correlation convolutional neural network back propagation neural neural network damage detection concrete

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南非华文传媒现状及其对华人社会的影响

西亚非洲 2008年第2期 63-66页

作者：罗俊翀周聿峨暨南大学国际关系学系博士生暨南大学华人华侨研究所教授、博士生导师

南非新闻业在非洲该领域中居最发达之列，在非洲，特别是在南部非洲具有相当影响力。南非期刊发行量居非洲之首，现有日报19种，发行量117万份；周报10余种，发行量267万份；另有200多种地区性报纸，800多种各类杂志，它们大多以英语和... 详细信息

南非新闻业在非洲该领域中居最发达之列，在非洲，特别是在南部非洲具有相当影响力。南非期刊发行量居非洲之首，现有日报19种，发行量117万份；周报10余种，发行量267万份；另有200多种地区性报纸，800多种各类杂志，它们大多以英语和阿非利卡语出版发行。南非约有460万日报读者，860万周报读者和880万杂志读者。南非传媒业中的平面（报刊、杂志）和电子（通讯社、电台、电视台、网站）等传媒手段均较成熟，电台、电视台以多种语言和多套节目向伞围及南部非洲一此国家播出。

关键词：南非华人社会华文传媒期刊发行量南部非洲现状出版发行传媒手段

Observer-Based Adaptive Robust Precision Motion Control of a Multi-Joint Hydraulic Manipulator

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Ieee/CAA Journal of Automatica Sinica 2024年第5期11卷 1213-1226页

作者： Zheng Chen Shizhao zhou Chong Shen Litong Lyu Junhui Zhang Bin Yao State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027 Ocean College Zhejiang UniversityZhoushan 316021China School of Mechanical engineering Shijiazhuang Tiedao UniversityShijiazhuang 050000 State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China School of Mechanical engineering Purdue UniversityWest LafayetteIN 47907 USA

Hydraulic manipulators are usually applied in heavy-load and harsh operation ***,when faced with a complex operation,the traditional proportional-integral-derivative(PID)control may not meet requirements for high control ***-based full-state-feedback control is an effective alternative,but the states of a hydraulic manipulator are not always available and reliable in practical applications,particularly the joint angular velocity *** that it is not suitable to obtain the velocity signal directly from differentiating of position measurement,the low-pass filtering is commonly used,but it will definitely restrict the closed-loop bandwidth of the whole *** avoid this problem and realize better control performance,this paper proposes a novel observerbased adaptive robust controller(obARC)for a multi-joint hydraulic manipulator subjected to both parametric uncertainties and the lack of accurate velocity ***,a nonlinear adaptive observer is first designed to handle the lack of velocity measurement with the consideration of parametric ***,the adaptive robust control is developed to compensate for the dynamic uncertainties,and the close-loop system robust stability is theoretically proved under the observation and control ***,comparative experiments are carried out to show that the designed controller can achieve a performance improvement over the traditional methods,specifically yielding better control accuracy owing to the closed-loop bandwidth breakthrough,which is limited by low-pass filtering in fullstate-feedback control.

关键词： handle Observer filtering

基于在线分级恒流充电的蓄电池智能管理系统研究

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煤炭技术 2014年第3期33卷 154-155页

作者：周月娥钟山职业技术学院南京210049

提出了基于在线分级恒流充电的蓄电池智能充放电管理系统方案,将原有的开关电源恒压充电方式改为在线分级定电流恒流脉冲方式充电,该系统方案可以大幅提高维护效率、有效延长蓄电池使用寿命。

关键词：分级定电流恒流脉冲充电模糊数据控制蓄电池智能充放电管理

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创新教育中德育教师角色转换探析

教育探索 2006年第2期 6-7页

作者：周双娥湖南文理学院两课部湖南常德415000

创新教育的目的是要教师成为引导者、促进者。这就要求教师在不同内容的教学中,充当不同的角色。具体为导演、舵手、记者、主持人、裁判员,并在与学生的关系上建立平等互助的关系,实现朋友似的交往。如此,才能更好地发挥引导者与促进者... 详细信息

创新教育的目的是要教师成为引导者、促进者。这就要求教师在不同内容的教学中,充当不同的角色。具体为导演、舵手、记者、主持人、裁判员,并在与学生的关系上建立平等互助的关系,实现朋友似的交往。如此,才能更好地发挥引导者与促进者的作用。

关键词：角色转换导演宣讲德育创新

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基于物联网技术的现代农业智能物流系统设计

中国农机化学报 2014年第5期35卷 256-260页

作者：周月娥钟山职业技术学院南京市210049

从我国农业物流的发展现状入手,引入农业智能物流的概念、关键技术和发展趋势等。提出基于物联网技术的现代农业智能物流解决方案,包含物流计划、车辆实时监控、运输配送管理、仓储管理和基础信息管理等五大子系统,形成全套农业智能物... 详细信息

从我国农业物流的发展现状入手,引入农业智能物流的概念、关键技术和发展趋势等。提出基于物联网技术的现代农业智能物流解决方案,包含物流计划、车辆实时监控、运输配送管理、仓储管理和基础信息管理等五大子系统,形成全套农业智能物流解决方案。对系统的物理组网方案进行详细设计,并进行信息、设备、流程和应用的综合管理,描述系统扩展性和自定义业务开发功能等。

关键词：物联网实时监控信息管理农业智能物流