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Insight into disinfection byproduct formation potential of aged biochar and its effects during chlorination

Journal of environmental management 2022年 317卷 115437页

作者： Hailan Yang Shujing Ye Han Wang Chengyun Zhou Ting Xiong Yuanyuan Deng Qianmin Fu Guangming Zeng Zhuotong Zeng Xiaofei Tan Department of Dermatology Second Xiangya Hospital Central South University Changsha 410011 PR China College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education) Hunan University Changsha 410082 PR China. College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education) Hunan University Changsha 410082 PR China School of Resources Environment and Materials Guangxi University Nanning 530004 PR China. Institute of Big Data and Internet Innovation Hunan University of Technology and Business Changsha 410205 PR China. College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education) Hunan University Changsha 410082 PR China. Electronic address: zengzhuotong@***. College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education) Hunan University Changsha 410082 PR China. Electronic address: tanxf@***.

Biochar can achieve multiple benefits including solid waste management, polluted water remediation, carbon sequestration, and emission reduction. However, various environmental factors (such as temperature variations and dry-wet alternation) and microbial activity may lead to the fragmentation, dissolution, and oxidation of biochar. These accelerate the dissolution of biochar-derived dissolved organic matter (DOM) and then influence disinfection byproducts formation potential (DBPFP) throughout the water treatment process. In this paper, biochars from six biomass feedstocks with five aging processes were prepared, and the DBPFP of biochar and its derived DOM were first studied systematically. Different aging processes might increase the DBPFP of biochar by increasing DOM content and changing the fraction distribution of DOM derived from biochar. Especially, the DBPFP of biochar increased apparently with the chemical aging process. Coexisting with the environmental concentration of humic acid, even aged biochar showed the potential to reduce DBPFP and integrated toxic risk value of the mixed system. In this study, the DBPFP of biochar-derived DOM during the disinfection process is confirmed, and the results can give information to the selection of biomass feedstocks of biochar and its service life in the water treatment process.

关键词： Aged biochar Chlorination Disinfection byproducts Dissolved organic matter Integrated toxic risk value

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Performance of Three Atmospheric Density Models on Precise Orbit Determination for Haiyang-2A Satellite Using DORIS Data 5th

Performance of Three Atmospheric Density Models on Precise O...

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5th GeoChina International Conference on Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, 2018

作者： Kong, Qiaoli Guo, Jinyun Han, Litao Shen, Yi College of Geomatics Shandong University of Science and Technology Qingdao China State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao China Engineering Laboratory of Spatial Information Technology of Highway Geological Disaster Early Warning in Hunan Province Changsha University of Science & Technology Changsha China

ISBN: (纸本)9783319956442

DORIS has become a matured space geodetic technique after more than ten years of development. This geodetic technique is mainly applied to determine the orbit for the low Earth orbit (LEO) satellite. There are a number of non-conservative forces acting on Haiyang-2A (HY-2A) satellite with altitude of about 970 km, in which the atmospheric drag is the most dominant and uncertainty in the precise orbit determination (POD) with the dynamic method. In order to achieve POD for HY-2A, MSIS-86, Jacchia 1971 and DTM87 models were evaluated in this study. The precise orbits of HY-2A from DORIS data were compared with the precise orbit ephemeris computed by the Centre National d’Etudes Spatiales (CNES). Tests demonstrated that the relative optimal atmospheric density model was the empirical MSIS-86 model for HY-2A satellite with the corresponding drag coefficient of 2.0. The RMS of orbit difference between the derived orbits using MSIS-86 and the CNES orbits was 0.842 cm in the radial direction, and 3.899 cm in three dimensions (3D). This study will provide valuable references for the LEO satellites with similar altitude and surface, especially for the other HY-2 series satellite of China. © 2019, Springer International Publishing AG, part of Springer Nature.

关键词： Orbits

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Neighborhood Interval Observer Based Coordination control for Multi-agent Systems with Disturbances ⁎

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IFAC-PapersOnLine 2020年第2期53卷 10994-10999页

作者： Xiaoling Wang Guo-Ping Jiang Wen Yang Housheng Su Xiaofan Wang College of Automation Nanjing University of Posts and Telecommunications Nanjing 210023 China and also with Jiangsu Engineering Lab for IOT Intelligent Robots (IOTRobot) Nanjing 210023 China Key Laboratory of Advanced Control and Optimization for Chemical Processes East China University of Science and Technology Shanghai 200237 China School of Artifcial Intelligence and Automation Image Processing and Intelligent Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Luoyu Road 1037 Wuhan 430074 China Department of Automation Shanghai University Shanghai 200072 China

This paper focuses on multi-agent systems with uncertain disturbances, in which only the bounding functions on the disturbances and the bounds on the initial state of each agent are known. By designing a neighborhood interval observer for this kind of multi-agent system, the estimation of the sum of the relative state of each agent associated with itself and its neighbors is frstly realized. Then, on the basis of these estimated information, local control algorithm is designed to drive the system to achieve bounded consensus.

关键词： Multi-agent system disturbance neighborhood interval observer bounded consensus

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Prediction of three-dimensional stretchable boron nitride nanoribbons

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Diamond and Related Materials 2022年 121卷

作者： Mei Xiong Hu Hasi Qi Gao Dongliang Jin QiaoHe Wu Xiuqing Li Qian Zhang Zhou Wang Zhikang Yuan National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials Henan University of Science and Technology Luoyang 471003 China Center for High Pressure Science State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China College of Material and Chemical Engineering Zhongyuan University of Technology Zhengzhou 450007 China

In this paper, a series of fully sp 2 -hybrid three-dimensional boron nitride nanoribbons (3D-BNNRs) polymorphs entirely composed of hexagonal rings is described herein. The 3D-BNNRs can be considered as connected BNNRs with different widths. All the predicted structures are thermodynamically metastable with 0.111–0.281 eV per BN unit higher than hBN. The elastic constants and phonon dispersion calculations show the 3D-BNNRs are mechanically and dynamically stable. The 3D-BNNRs are semiconductors, which are independent of the width of BNNRs. Tensile strength calculations show the 3D-BNNRs are very strong in the BNNRs-like plane, comparable to graphene and BNNRs. Moreover, under uniaxial strains, the 3D-BNNRs are very stretchable, and can hold more deformation along the direction perpendicular to BNNRs motif than in other directions, although the ideal strengths are lower than those in-plane direction.

关键词： First-principles calculations Boron nitride polymorphs Honeycomb materials Surperstretchable High strength

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Robotic Electrospinning Actuated by Non-Circular Joint Continuum Manipulator for Endoluminal Therapy

Robotic Electrospinning Actuated by Non-Circular Joint Conti...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Zicong Wu Chuqian Lou Zhu Jin Shaoping Huang Ning Liu Yun Zou Mirko Kovac Anzhu Gao Guang-Zhong Yang Shanghai Jiao Tong University Shanghai P. R. China Imperial College London and Empa-Swiss Federal Laboratories for Materials Science and Technology Precision Robotics (Hong Kong) Limited Hong Kong China Aerial Robotics Laboratory Imperial College London London United Kingdom Shanghai Jiao Tong University and the Key Laboratory of System Control and Information Processing Ministry of Education Shanghai China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai China Institute of Medical Robotics Shanghai Jiao Tong University Shanghai P. R. China

Electrospinning has exhibited excellent benefits to treat the trauma for tissue engineering due to its produced micro/nano fibrous structure. It can effectively adhere to the tissue surface for long-term continuous therapy. This paper develops a robotic electrospinning platform for endoluminal therapy. The platform consists of a continuum manipulator, the electrospinning device, and the actuation unit. The continuum manipulator has two bending sections to facilitate the steering of the tip needle for a controllable spinning direction. Non-circular joint profile is carefully designed to enable a constant length of the centreline of a continuum manipulator for stable fluid transmission inside it. Experiments are performed on a bronchus phantom, and the steering ability and bending limitation in each direction are also investigated. The endoluminal electrospinning is also fulfilled by a trajectory following and points targeting experiments. The effective adhesive area of the produced fibre is also illustrated. The proposed robotic electrospinning shows its feasibility to precisely spread more therapeutic drug to construct fibrous structure for potential endoluminal treatments.

关键词： Drugs Electric potential Fluids Tissue engineering Medical treatment Bending Manipulators

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Operating performance assessment for industrial process with hybrid qualitative and quantitative information using modified fuzzy probabilistic rough set

Operating performance assessment for industrial process with...

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Chinese Automation Congress (CAC)

作者： Xiaoyu Zou Fuli Wang Yuqing Chang Jie Pan School of Mechatronic Engineering China University of Mining and Technology Xuzhou China State Key Laboratory of Process Automation in Mining & Metallurgy Beijing China College of Information Science & Engineering Northeastern University Shenyang China School of Information and Control Engineering Xuzhou China

ISBN: (数字)9781728176871

ISBN: (纸本)9781728176888

Since satisfactory operating performance helps guarantee high comprehensive economic benefit under normal working condition for industrial processes, it is crucial to conduct accurate performance assessment on the degree of optimality for modern industry. Process online assessment judges how well the process is working. However, the coexistence of the qualitative and quantitative information renders the conventional performance assessment approaches inappropriate. To solve the above problem, a modified version of fuzzy probabilistic rough set (FPRS) is proposed for performance assessment in this research. The modified FPRS is employed to establish a valid online assessment strategy of operating performance for complicated industrial processes with the coexistence of both the qualitative and quantitative information. The proposed technique is finally validated by a gold hydrometallurgy process.

关键词： Rough sets Probabilistic logic Uncertainty Production Process control Indexes Gold

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Adaptive Iterative Learning control for Upper Limb Rehabilitation Robots With Considering Model Uncertainty

Adaptive Iterative Learning Control for Upper Limb Rehabilit...

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第30届中国过程控制会议（CPCC 2019）

作者： Yafeng Li Aimin An Jinlei Wang Fancheng Meng College of Electrical and Information Engineering Lanzhou University of Technology Key Laboratory of Gansu Advanced Control for Industrial Processes

For the upper limb rehabilitation robot, the model uncertainty and spasmodic disturbance are the main factors that affect the tracking accuracy performance in trajectory tracking *** the repetitive features of the rehabilitation robot system, an adaptive iterative learning control algorithm that combined the adaptive mechanism and the unique properties of iterative learning algorithms is proposed to improve the dynamic tracking accuracy in the control of an upper limb rehabilitation *** Lyapunov stability theory, the global incremental stability of closed-loop systems is *** simulation results show that the proposed adaptive iterative learning control has good control performance in the case of system model uncertainty and external uncertainty disturbance, and satisfactory tracking performance can also be obtained.

关键词： Rehabilitation robot Model uncertainty Track tracking Adaptive Iterative Learning control

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Towards Personalized Privacy-Preserving Incentive for Truth Discovery in Crowdsourced Binary-Choice Question Answering

Towards Personalized Privacy-Preserving Incentive for Truth ...

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IEEE Annual Joint Conference: INFOCOM, IEEE Computer and Communications Societies

作者： Peng Sun Zhibo Wang Yunhe Feng Liantao Wu Yanjun Li Hairong Qi Zhi Wang State Key Laboratory of Industrial Control Technology Zhejiang University P. R. China School of Cyber Science and Engineering Wuhan University P. R. China Department of Electrical Engineering and Computer Science University of Tennessee Knoxville USA School of Computer Science and Technology Zhejiang University of Technology P. R. China

ISBN: (数字)9781728164120

ISBN: (纸本)9781728164137

Truth discovery is an effective tool to unearth truthful answers in crowdsourced question answering systems. Incentive mechanisms are necessary in such systems to stimulate worker participation. However, most of existing incentive mechanisms only consider compensating workers' resource cost, while the cost incurred by potential privacy leakage has been rarely incorporated. More importantly, to the best of our knowledge, how to provide personalized payments for workers with different privacy demands remains uninvestigated thus far. In this paper, we propose a contract-based personalized privacy-preserving incentive mechanism for truth discovery in crowdsourced question answering systems, named PINTION, which provides personalized payments for workers with different privacy demands as a compensation for privacy cost, while ensuring accurate truth discovery. The basic idea is that each worker chooses to sign a contract with the platform, which specifies a privacy-preserving level (PPL) and a payment, and then submits perturbed answers with that PPL in return for that payment. Specifically, we respectively design a set of optimal contracts under both complete and incomplete information models, which could maximize the truth discovery accuracy, while satisfying the budget feasibility, individual rationality and incentive compatibility properties. Experiments on both synthetic and real-world datasets validate the feasibility and effectiveness of PINTION.

关键词： Privacy Knowledge discovery Crowdsourcing Contracts Task analysis Drugs

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control Performance Monitoring with Temporal Features and Dissimilarity Analysis for Nonstationary Dynamic Processes

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IFAC-PapersOnLine 2018年第18期51卷 357-362页

作者： Zhao, Chunhui Huang, Biao State Key Laboratory of Industrial Control Technology College of Control Science and Engineering Zhejiang University Hangzhou310027 China Department of Chemical and Materials Engineering University of Alberta EdmontonABT6G-2V4 Canada

Recently, the combination of cointegration analysis (CA) and slow feature analysis (SFA), has been adopted for concurrent monitoring of operation condition and process dynamics for nonstationary dynamic processes subject to time variant conditions. By isolating long-term temporal equilibrium features and specific temporal slow features from steady-state information, the CA-SFA based monitoring scheme can well distinguish between the changes of operation conditions and real faults. Considering that the temporal variation can provide an indication of control performance changes, the CA-SFA algorithm is further exploited based on dissimilarity analysis of temporal distribution to explore its unique efficacy in control performance monitoring (CPM). Two attractive features of the proposed approach are noticed. First, it is compatible with various operation conditions simultaneously including multifarious steady states and dynamic switchings between different working points. Second, a new performance monitoring index is used to monitor the control performance by quantifying the distribution structure of temporal features against the benchmark from both fast and slow dynamics aspects. Case study on a chemical industrial scale multiphase flow experimental rig shows the feasibility of the new CPM method. © 2016

关键词： Benchmarking

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Design of quasi-zero-stiffness metamaterials with ultra-wideband vibration isolation performance

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International Journal of Mechanical sciences 2025年 300卷

作者： Lingbo Li Fan Yang Sanfeng Liu Zhengmiao Guo Dong Han Yi Xia Lihua Wang Hualin Fan School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai 200092 China Shanghai Institute of Aircraft Mechanics and Control Tongji University Shanghai 200092 China State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial Equipment Dalian University of Technology Dalian 116024 China Institute of Defense Engineering Academy of Military Science Beijing 100036 China Research Center of Lightweight Structures and Intelligent Manufacturing Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

Traditional single-function lightweight structure excels in a specific application scenario such as energy absorption, but is difficult to meet the multi-function requirements of the complex working environment for the high-end equipments. In this paper, a novel quasi-zero stiffness (QZS) metamaterial is proposed based on the topological design combining the positive and negative stiffness units, to achieve the multifunction integration of vibration attenuation and energy absorption. The quasi-static compression tests and shaker vibration isolation tests were carried out on the specimens prepared by stereolithography (SLA) and selective laser sintering (SLS) additive manufacturing techniques. The effects of structural parameters and base materials on the mechanical and vibration isolation properties of QZS metamaterials were systematically investigated. The proposed QZS metamaterial can realize the ultra-wideband vibration damping effect with the isolation band as wide as 5980 Hz, and the overall deformation of the structure can be adjusted by both mechanical load and temperature programming. In addition, the proposed QZS metamaterials have excellent repeatable energy absorption properties, maintaining 80 % load carrying capacity and 92 % specific energy absorption (SEA) after six loading cycles. Therefore, the QZS metamaterial can simultaneously achieve high load-bearing capacity and excellent vibration isolation performance, providing a new pathway to build multifunctional integrated lightweight structures.

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