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Electrocoagulation coupled with electrooxidation for the simultaneous treatment of multiple pollutants in contaminated sediments

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Journal of Environmental Sciences 2023年第2期124卷 89-97页

作者： qingjun zeng Yifan Zhang Pingshan Chen Yuting He Congli Yi Chunhua Feng Fourth Harbor Engineering Institute Co. Ltd.China Communications Construction Co.Ltd.Guangzhou 510230China Key Laboratory of Environmental Protection&Safety of Communication Foundation Engineering China Communications Construction Co.Ltd.Guangzhou 510230China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China

In situ and simultaneous remediation of a variety of pollutants in sediments remains a *** this study,we report that the combination of electrocoagulation(EC)and electrooxidation(EO)is efficient in the immobilization of phosphorus and heavymetals and in the oxidation of ammonium and toxic *** integratedmixed metal oxide(MMO)/Fe anode system allowed the facile removal of ammonium and phosphorus in the overlying water(99% of 10 mg/L NH_(4)^(+)-N and 95% of 10 mg/L P disappeared in 15 and 30 min,respectively).Compared with the controls of the single Fe anode and single MMO anode systems,the dual MMO/Fe anode system significantly improved the removal of phenanthrene and promoted the transition of Pb and Cu from the mobile species to the immobile *** concentrations of Pb and Cu in the toxicity characteristic leaching procedure extracts were reduced by 99%and 97% after an 8 hr *** tests with four real polluted samples indicated that substantial proportions of acid-soluble fraction Pb and Cu were reduced(30%-31% for Pb and 16%–23% for Cu),and the amounts of total organic carbon and NH_(4)^(+)-N decreased by 56%–71% and 32%–63%,*** was proposed that the in situ electrogenerated Fe(II)at the Fe anode and the active oxygen/chlorine species at the MMO anode are conducive to outstanding performance in the co-treatment of multiple *** results suggest that the EC/EO method is a powerful technology for the in situ remediation of sediments contaminated with different pollutants.

关键词： In situ sediment remediation Electrocoagulation Electrooxidation Stabilization of heavy metals Ammonia oxidation Removal of polycyclic aromatic hydrocarbons

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Horizontal Motion Tracking Control for an Underwater Vehicle with Environmental Disturbances 36

Horizontal Motion Tracking Control for an Underwater Vehicle...

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第36届中国控制会议

作者： Hui Ye Mou Chen qingjun zeng School of Electronics and Information Jiangsu University of Science and Technology College of Automation Engineering Nanjing University of Aeronautics and Astronautics

ISBN: (纸本)9781538629185

In this paper,the trajectory tracking problem for horizontal motion of underwater vehicle with unknown environmental disturbances is solved based on the disturbance observer method.A 3-DOF nonlinear model of underwater vehicle including matched and non-matched external disturbances is *** then,a classical backstepping tracking controller is designed based on the established multi-input and multi-output *** order to tackle the external disturbances,two nonlinear disturbance observers are employed to provide appropriate compensation in the ***,the dynamic surface control technique is used to handle the problem of explosion of *** the proposed control scheme,the estimated errors of the disturbance observers and the tracking errors of the closed-loop system are guaranteed to be uniformly ultimately ***,simulation results are given to illustrate the performance of the proposed control scheme.

关键词： AUV Motion control Disturbance observer Backstepping Dynamic surface control

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Multivariable fast nonsingular terminal sliding mode control for remotely operated vehicle 36

Multivariable fast nonsingular terminal sliding mode control...

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第36届中国控制会议

作者： Song Liang Fei Wu Guangyi Zhang Xiaoqiang Dai qingjun zeng School of Electronics and Information Jiangsu University of Science and Technology No.704 Institute of China Shipbuilding Industry Corporation(CSIC)

ISBN: (纸本)9781538629185

Remotely Operated Vehicle（ROV） need to maintain the stability of the ROV body as much as possible to achieve efficient operation,so the ROV dynamic positioning technology is essential.A new multivariable fast nonsingular terminal sliding mode control（MFNTSM） method is proposed for the problem that global convergence of the nonsingular terminal sliding mode control（NTSM） method is *** six-degree-of-freedom motion model of our ROV is established based on the hydrodynamic coefficients calculated by the pool experiment and numerical ***,the new sliding mode controller（MFNTSM） is simulated and compared with the NTSM under the condition of static water and *** results show that the MFNTSM controller has better convergence speed and better robust performance than the NTSM controller in the dynamic positioning system.

关键词： Sliding Mode Control MFNTSM Multivariable Control Dynamic Positioning Remotely Operated Vehicle

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重庆市都市区产业发展:历史、现状与趋势

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上海经济研究 2005年第6期17卷 61-66页

作者：曾庆均重庆工商大学长江上游经济研究中心经济贸易学院 400067

重庆市都市区是重庆直辖市的市域中心城市,在重庆直辖市社会经济发展中起着核心与极化作用。文章就重庆开埠来,都市区产业发展历史、现状作了客观描述,并就其产业发展趋势作了定性分析。

关键词：都市区产业发展

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Research on Teleoperated System Position Control of Underwater Robot Based on Soft Manipulator

Research on Teleoperated System Position Control of Underwat...

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第43届中国控制会议

作者： Zongpu Yang Zheng Ling Chunwei Han qingjun zeng Xiaoqiang Dai School of Automation Jiangsu University of Science and Technology

In order to adapt to the complex underwater operating environment and ensure the integrity of marine soft tissue organisms and underwater precious relics grasping, this paper proposes the position control design scheme of underwater remotely operated vehicle(ROV) based on soft body operating hand and develops the system to achieve the position tracking. The system consists of three parts: underwater remotely operated vehicle(ROV), soft body main hand and control system, soft body operating hand and control system. The underwater ROV includes surface control system, underwater control system,underwater robot and communication cable. The soft main hand and soft working hand are made by imitating the structure of human fingers using a combination of soft and hard methods, the material is human silicone, injection molding and 3D printing of bones, pneumatic drive, and the soft working hand is embedded with bending sensors and force sensors. In the grasping operation, the soft working hand achieves position tracking by detecting the bending angle signal, and simultaneously senses the force haptics of grasping to complete the grasping of the target object. The control system of the soft main hand and the soft operating hand includes hardware and software control system design. The experimental results show that this underwater robot teleoperation system based on the soft operating hand achieves good human-computer interaction, and the position control of the soft operating hand is better, which can effectively perform position tracking and soft target grasping. The work in this paper has a positive reference value for the practical application of marine underwater teleoperating system.

关键词： underwater robot teleoperation soft-working hand position control

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强夯后地基承载力的估算

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岩石力学与工程学报 2006年第z2期25卷 3523-3528页

作者：曾庆军莫海鸿李茂英华南理工大学建筑学院广东广州510640 广东交通职业技术学院广东广州510650

基于强夯法处理软弱地基承载力的研究现状,对夯后地基承载力作经验统计回归分析,得出强夯后地基容许承载力是单夯击能和点夯击数的函数。研究结果表明,其不仅仅为单夯击能的函数。强夯处理无黏性土地基时,按照拟静力法,首先计算出强夯... 详细信息

基于强夯法处理软弱地基承载力的研究现状,对夯后地基承载力作经验统计回归分析,得出强夯后地基容许承载力是单夯击能和点夯击数的函数。研究结果表明,其不仅仅为单夯击能的函数。强夯处理无黏性土地基时,按照拟静力法,首先计算出强夯拟静力、夯坑深度,然后确定夯后相对密实度。按照前人研究的相对密实度和标准贯入值的经验关系来确定标准贯入值,再依据《建筑地基基础设计规范》(GB50007-2002)的规定,按标准贯入击数确定地基承载力标准值,提出其估算公式。工程实例表明,所获得的公式简单且易应用。强夯后地基承载力的估算可为强夯法处理地基的初步设计和处理方案的比选提供依据。

关键词：土力学强夯无黏性土地基承载力拟静力

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Fault Prediction of High-Speed Train Suspension Systems based on Transformer with Improved Temporal Distribution Matching Algorithm

Fault Prediction of High-Speed Train Suspension Systems base...

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第43届中国控制会议

作者： Xuansen Wang Yunkai Wu Yang Zhou Zhiyu Zhu qingjun zeng College of Automation Jiangsu University of Science and Technology School of Computer Science and Engineering Jiangsu University of Science and Technology

This article investigates the fault trend prediction problem of high-speed train suspension systems in the case of data missing *** the perspective of data distribution,Transformer architecture with improved temporal distribution matching(TDM) algorithm is proposed in this paper to further explore the field of fault trend ***,calculating the sensitivity,degree and location of faults to missing ***,the reorganization of encoder layer in TDM algorithm is ***,experiments in SIMPACK-MATLAB/Simulink co-simulation environment is used to validate the effectiveness of the improved TDM algorithm in fault prediction,especially when missing data leads to significant differences in data distribution.

关键词： High-speed train suspension system fault prediction data missing temporal distribution matching algorithm

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选煤厂变频器抗干扰问题及其解决办法

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选煤技术 2008年第5期36卷 62-63页

作者：曾庆军天地科技股份有限公司唐山分公司河北唐山063012

变频器在选煤厂的应用过程中的干扰问题日益引起人们的重视。文章主要分析了变频器应用系统中干扰产生的来源,提出了抗干扰方法,介绍了在变频器应用系统设计和安装中抑制干扰的具体措施。

关键词：变频器抗干扰原因 PLC 解决办法

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长江经济带商贸流通业协调发展评价

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改革 2018年第8期 129-137页

作者：曾蓼王宁曾庆均重庆工商大学长江上游经济研究中心重庆市农村商业银行重庆工商大学

根据长江经济带商贸流通业协调发展的四个标志,构建长江经济带商贸流通业协调发展的评价指标体系,并通过加权算术平均法和模糊数学的隶属度函数法构建长江经济带商贸流通业协调发展度指标以及判断标准,随后通过定量分析对协调发展度进... 详细信息

根据长江经济带商贸流通业协调发展的四个标志,构建长江经济带商贸流通业协调发展的评价指标体系,并通过加权算术平均法和模糊数学的隶属度函数法构建长江经济带商贸流通业协调发展度指标以及判断标准,随后通过定量分析对协调发展度进行测度。结果表明,2007~2016年,长江经济带商贸流通业协调发展度大体呈下滑趋势,区域间协调性逐渐降低。促进长江经济带商贸流通业协调发展,应以国家战略为出发点,构建商贸流通业战略协调机制、以互利共赢为目标,构建商贸流通业利益协调机制、以长江经济带"综合交通网"为载体,构建商贸流通业空间协调机制。

关键词：长江经济带商贸流通业协调发展

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Sonar Target Recognition Research Based on AUV

Sonar Target Recognition Research Based on AUV

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第37届中国控制会议

作者： Jiamin Zhang qingjun zeng Zhiyu Zhu Qiang Zhao Jinyi Yao Qirun Zhou School of Electronic and Information Jiangsu University of Science and Technology School of Computer Jiangsu University of Science and Technology

In order to meet the requirements of underwater search and rescue, exploration, target detection and tracking, "T-SEA I" Autonomous Underwater Vehicle was developed. Based on the front-view sonar mounted at the Autonomous Underwater Vehicle, the target recognition experiment was carried out. Sonar target detection and identification research was carried out based on the selected images from moving target. In this paper, the system composition and principles of "T-SEA I" are described. We then propose a framework for a control system in which laptop and surface control box act as a surface monitor unit, While the PC104 industrial control board acts as the main control unit of the AUV’s autopilot. The target recognition process includes three steps: image enhancement, target detection, feature extraction and identification. The three frame differential method is used to detected sonar target. A fast ellipse detection algorithm based on Hough transform is adopted in target characteristics extraction, this algorithm reduces the parameter dimension by using the geometry of the ellipse. The lake experiment shows that the AUV runs reliable and normally, it can meet the requirement of underwater work. Besides, the sonar target recognition is well. This Autonomous Underwater Vehicle’s architecture and target recognition method have reference significance to the development of large-scale Autonomous Underwater Vehicle and the target identification of video and infrared.

关键词： AUV control system sonar target detection target recognition

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