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基于HMM-MLP的泵站监测健康诊断系统研究

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中国农村水利水电 2024年第7期 255-261,269页

作者：匡正袁志波徐振磊江苏省江都水利工程管理处江苏扬州225000

为实现泵站工程在生产运行过程中有效预测设备潜在故障风险,提升泵站设备运行效率,在数字孪生水利工程数据底板基础上,基于现有硬件设备,以结构故障机理为导向,提出了一种HMM-MLP的泵站设备故障预测方法。先由连续小波包变换处理设备的... 详细信息

为实现泵站工程在生产运行过程中有效预测设备潜在故障风险,提升泵站设备运行效率,在数字孪生水利工程数据底板基础上,基于现有硬件设备,以结构故障机理为导向,提出了一种HMM-MLP的泵站设备故障预测方法。先由连续小波包变换处理设备的运行信号,然后通过HMM模型生成设备运行状态序列作为MLP网络的输入预测设备故障,最后通过仿真实验表明,HMM-MLP模型可有效提高泵站设备故障的预测准确率。同时,依托在线监测数据和离线检查与试验数据,建立了设备健康评价指标体系,并开发了泵站监测健康诊断系统,协助运行管理人员充分了解和掌握机组设备的“健康”状态,提升设备管理的信息化水平。结果表明:该研究可为泵站健康系统建设提供实际案例指导与经验启示。

关键词：智慧泵站信号处理机器学习隐马尔可夫模型故障预测

Fracture Analysis of Cast Iron Materials with Cracks Based on Elastoplastic Extended Finite Element Method

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Acta Mechanica Solida Sinica 2019年第2期32卷 201-214页

作者： Yanjun Chang Qiao Song zheng kuang Keshi Zhang Zhanguang zheng College of Civil Engineering and Architecture Guangxi University Nanning 530004 China College of Mechanical Engineering Guangxi University Nanning 530004 China Guangxi Key Laboratory of Disaster Prevention and Engineering Safety Guangxi University Nanning 530004 China Key Laboratory of Engineering Disaster Prevention and Structural Safety of Ministry of Education Guangxi University Nanning 530004 China

Based on the ABAQUS platform for finite element analysis, the extended finite element method (XFEM) considering elastoplastic constitutive relationship is developed, by which the displacement discontinuity across the crack surface and the strong nonlinearity near the crack tip can be described more accurately. The strip specimens with unilateral cracks and central cracks under uniaxial tension are simulated using the XFEM and the FEM, respectively. The J-integral across the crack on each incremen t is calcula ted using the equivale nt domain integral met hod (EDIM), the interaction integral met hod and the FEM, respectively. The effec ts of mesh size and mesh shape near the crack tip, element type and different calculation methods on the accuracy of J-integral are analyzed. The simulation results show that the XFEM is more accurate than the FEM with the same element size and type. The fracture tests of cast iron specimens with unilateral cracks under uniaxial tension are performed, and the J-integral criterion is valid to predict the fracture initiation in numerical simulation. The critical value of J-integral is calculated using the EDIM of the XFEM. The comparisons demonstrate that the simulated elastoplastic load-displacement curves with the XFEM are in good agreement with the experimental results.

关键词： J-Integral Extended finite element Elastoplasticity Fracture criterion

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“数字孪生”灌排泵站的建设与思考

上海大中型电机 2024年第1期 49-53页

作者：匡正刘媛媛肖璐江苏省江都水利工程管理处扬州225200

目前大中型灌排泵站基本建设了自动化控制系统,实现工程在线监管和自动化控制,但在信息感知、科学决策及智能化运行方面,管理水平还比较低。为适应国家信息化发展战略总体要求和水利改革的发展目标,大中型灌排泵站应基于日常管理需求,... 详细信息

目前大中型灌排泵站基本建设了自动化控制系统,实现工程在线监管和自动化控制,但在信息感知、科学决策及智能化运行方面,管理水平还比较低。为适应国家信息化发展战略总体要求和水利改革的发展目标,大中型灌排泵站应基于日常管理需求,积极搭建数字孪生泵站管理平台,实现“四预”功能。本文结合某大型灌排泵站的信息化建设实践,介绍了数字孪生技术在泵站设计、应用和实践,为相关泵站管理单位信息化建设提供参考。

关键词：数字孪生灌排泵站信息化管理

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水利工程机电设备标准化管理编码初探

上海大中型电机 2024年第2期 54-57页

作者：匡正肖璐刘媛媛江苏省江都水利工程管理处扬州225200

水利工程机电设备是工程管理的重要组成部分,也是实施标准化管理的重点内容。特别是在推进水利工程信息化建设的过程中,需要对各类机电设备的编码规则进行统一,使得每个设备对应唯一的编码,提高设备标准化管理水平。本文介绍了江都水利... 详细信息

水利工程机电设备是工程管理的重要组成部分,也是实施标准化管理的重点内容。特别是在推进水利工程信息化建设的过程中,需要对各类机电设备的编码规则进行统一,使得每个设备对应唯一的编码,提高设备标准化管理水平。本文介绍了江都水利枢纽各闸站工程机电设备的编码规则和具体编码方法,并提出注意事项和部分合理化建议,供相关水利工程管理单位参考。

关键词：水利工程机电设备编码

A pH-sensitive Modified Polyacrylamide Hydrogel

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Chinese Chemical Letters 2006年第3期17卷 399-402页

作者： Ping An SONG Ya Feng ZHANG Jian zheng kuang Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou 510650 Guangdong Research and Development Center of Chemical Grouting Engineering Technology Guangzhou 510650

A pH-sensitive modified polyacrylamide hydrogel was prepared by two steps and the modified polyacrylamide was characterized by ^1HNMR spectrum. The surface morphology and swelling behavior of the hydrogels were invest... 详细信息

关键词： Polyacrylamide hydrogel pH-sensitive.

Bond Mechanical Properties of Glass Fiber Reinforced Polymer Anti-Floating Anchor in Concrete Baseplate

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Journal of Shanghai Jiaotong university(Science) 2021年第6期26卷 804-812页

作者： BAI Xiaoyu zheng Chen ZHANG Mingyi LIU Xueying kuang zheng School of Civil Engineering Qingdao University of TechnologyQingdao 266033ShandongChina Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone Qingdao 266033ShandongChina

Combined with fiber Bragg grating(FBG)sensing technology,four glass fiber reinforced polymer(GFRP)anti-floating anchors and four steel anti-floating anchors were tested for on-site destructive failure to investigate the anchoring performance and the bonding characteristics between GFRP anti-floating anchor and concrete *** test results show that bending GFRP anchor will be broken at the common boundary between vertical anchorage section and bending section during the pullout process,and the spring-back load provided by the rupture contributes to a decrease of bearing capacity and an inflection point on the load-slip *** loaddisplacement curve of the straight anchor GFRP anti-floating anchor is smoother and has better predictability than the same type of steel ***,different forms of GFRP anti-floating bolt have different bondslip constitutive *** introducing the sliding-slip correction factor of bending bolt,constitutive models describing the rising-section of sliding-slip relation of bending and straight-anchored GFRP anti-floating bolt are established *** model can fit the test results rightly.

关键词： glass fiber reinforced polymer(GFRP) anti-floating anchor bolt axial force bearing capacity loadslip constitutive relationship

CROSSING ANASTOMOSIS OF NERVE BUNDLES NEAR INNERVATED ORGANS TO TREAT IRREPARABLE NERVE INJURIES

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Chinese Medical Sciences Journal 2006年第2期21卷 131-134页

作者： zheng-da kuang Xin-yu Zhang Jian-xiang Yao Meng-kui Kang He Li Jia-zheng Wang Department of Orthopedics General Hospital of Chinese People＇s Armed Police Forces Beijing 100039 People＇s Liberation Army Medical Academy of Sciences Beijing 100039

Objective To study the therapeutical effects of crossing anastomosis of nerve on the peripheral and central nerve injuries. Methods Twelve kinds of central and peripheral nerve disorders and their complications were treated with 11 kinds of crossing anastomosis of nerve bundles near the innervated organs. After nerve injury and repair, somatosensory evoked potentials （SEPs） and horseradish peroxidase （HRP） retrograde tracing studies were used to investigate the rabbit＇s nerve function and morphology. Resets The ulcers of all patients healed. Sensation, voluntary movement, and joint function recovered. Four weeks after the anastomosis of distal stump of radialis superficialis nerve and median nerve, pain sensation regained and SEPs appeared. HRP retrograde tracing studies demonstrated sensory nerve ending of medial nerve formed new connection with the body of neuron. Conclusion Crossing anastomosis of nerve is an effective method to treat peripheral and central nerve injuries.

关键词： anastomosis of nerve nerve injury

Impacts of permafrost degradation on streamflow in the northern Himalayas

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Science China Earth Sciences 2024年第6期67卷 1990-2000页

作者： Linfeng FAN Fang JI Xingxing kuang Zhilin GUO Rui ZHANG Chunmiao zheng State Key Laboratory of Mountain Hazards and Engineering Resilience Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610299China Yangtze Institute for Conservation and Development Hohai UniversityNanjing 210024China School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Eastern Institute for Advanced Study Ningbo 315200China

The Himalayan water tower provides crucial water resources for *** degradation is deemed to exert important impacts on streamflow in the Himalayan ***,the magnitudes of such impacts remain poorly ***,we established a robust hydrological model that incorporated active layer deepening and ground ice melt for the drainage basin of the largest river in the northern Himalayas-the Yarlung Zangbo River(YZR).We estimated that permafrost degradation led to~0.65 km^(3)/yr decrease in surface runoff and~0.35 km^(3)/yr increase in baseflow and ground ice melt contributed~0.25% to the annual streamflow in the YZR for the period ***“fill-and-spill”mechanism helps explain the seeming contradiction of observed increasing versus decreasing baseflow in different permafrost regions *** propose that the dilution of riverine dissolved organic carbon(DOC)concentrations by baseflow may lead to the riverine DOC hysteresis *** study not only lays solid scientific basis for water resources management in the Himalayas,but also yields new insights into how to interpret measured river discharge and nutrient flux in permafrost regions over the globe.

关键词： Permafrost degradation Hydrology Streamflow Surface runoff Groundwater Himalayas

Notes of Observations at the General Election in the United Sates

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International Understanding 1997年第1期 12-15页

作者： $$$$kuang zheng

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关键词： Notes of Observations at the General Election in the United Sates