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Thermoresponsive hydrogel-regulated interfacial polymerization for nanofiltration membranes with mono-/divalent anions separation performance

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Journal of Membrane Science 2025年 733卷

作者： Liu, Xin Wang, Dong Shen, Yun Wang, Ziming Wang, Zhining Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266237 China Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao266100 China

This study pioneered a concentration-engineered interfacial polymerization (IP) strategy using Pluronic F127 (PF-127) to solve the persistent permeability-selectivity trade-off in thin-film composite nanofiltration (TFC NF) membranes. Based on PF-127 concentration-driven phase behavior, we investigated three different IP processes including monolayer surfactant-induced IP (MLIP), micelle-monolayer coexisting IP (MCIP) and thermoresponsive hydrogel regulated IP (GIP). Below its critical micelle concentration (CMC), PF-127 formed an ordered interfacial monolayer, restricting piperazine (PIP) diffusion via hydrogen bonding and steric hindrance, forming ultrathin, smooth PA layers. Above CMC, micelle coexistence disrupted monolayer integrity, enhancing PIP diffusion and producing thicker, rougher membranes. Notably, at concentrations and temperatures exceeding CMC and lower critical solution temperature (LCST), PF-127 formed a hydrogel network that further controls monomer diffusion, enabling freestanding PA layers after low-temperature removal. The GIP membranes with high electronegative surface exhibited an exceptional Na2SO4/NaCl selectivity of 133.79 accompanied with a permeance of 14.80 L m−2 h−1 bar−1. The membrane demonstrated an excellent rejection to heavy metal sulfates (e.g., CuSO4, CdSO4, MnSO4), as well as an outstanding stability. The PF-127 hydrogel assisted GIP strategy paved a new way for NF membrane design, demonstrating significant potential for applications in heavy metal wastewater treatment and industrial wastewater valorization. © 2025 Elsevier B.V.

关键词： Nanofiltration

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Structural Evaluation and Formation Regularities of Garlic Clove-Like Meat in Prefabricated Grass Carp

SSRN

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SSRN 2024年

作者： Yang, Qin Xie, Junhong Zhang, Yuting Tian, Yiling Song, Liang Zhao, Yongqiang Xiong, Jian Liu, Ru Rong, Jianhua Xiong, Shanbai Hu, Yang College of Food Science and Technology Huazhong Agricultural University Hubei Wuhan430070 China SKL of Marine Food Processing & Safety Control National Engineering Research Center of Seafood School of Food Science and Technology Dalian Polytechnic University Liaoning Dalian116000 China Key Laboratory of Aquatic Product Processing Ministry of Agriculture and Rural Affairs of The People’s Republic of China National R&D Center for Aquatic Product Processing South China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Guangzhou510300 China Angel Yeast Co. Ltd. Hubei Yichang443000 China

Moderately marinated fish meat forms a garlic clove-like structure after cooking. However, this structure's formation mechanism and influencing factors are unclear. Therefore, this study explored the changes in protein components and potential protein markers during the formation of garlic clove-like structure. Results showed that the contents of free hydroxyproline, lysylpyridinoline, and hydroxylysylpyridinoline first increased and then decreased, the contents of decorin and elastin decreased, and TCA-soluble peptides increased slightly during the formation process of garlic clove-like structure. The Z-disk, M-line, and H bands in the myofibrils disappeared, and the myofibrils were interconnected. This was attributed to the effect of endogenous proteases (MMP, calpain, etc.) on myofibrils, collagen fibers, and proteoglycans. Proteomics data showed that the abundance of type Ⅰ collagen chains, myosin, actin, and telethonin increased while proteoglycans decreased. Among them, telethonin on the Z-disk can be used as a potential protein biomarker for the formation of garlic clove-like structure. © 2024, The Authors. All rights reserved.

关键词： Collagen

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The seismogenic structure of strong intraplate earthquakes in Shantou region, South China: Insights from upper crustal shear-wave velocity structure

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Earthquake Research Advances 2025年

作者： Lue Yang Lun Li Xiuwei Ye Jinming Zhang Jialong He Yuan Gao Pengfei Li Yu He Ziwei Li School of Earth Sciences and Engineering Sun Yat-Sen University and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) 519082 China China Earthquake Administration Key Laboratory of Earthquake Monitoring and Disaster Mitigation Technology Guangdong Earthquake Agency Guangzhou 510070 China Guangdong Science and Technology Collaborative Innovation Center for Earthquake Prevention and Disaster Mitigation Guangzhou 510070 China Key Laboratory of Disaster Forecast and Control in Engineering of the Ministry of Education Urban Earthquake Safety Laboratory Guangzhou 510070 China

The Shantou region, one of the most seismically active zones of Guangdong Province (South China), has experienced multiple strong earthquakes including two significant events with magnitudes greater than 7.0 occurred in 1600 and 1918, respectively. To investigate the seismogenic structures responsible for these major earthquakes and their potential triggering mechanisms, in this study, we construct a high-resolution shear-wave velocity model from surface to ∼15 km depth based on a dense nodal seismic array using ambient noise tomography. The model reveals a pronounced low-velocity zone (LVZ) at depths of 2-15 km, with a perturbation of -2 to -8%, coinciding with the northwestern extension of the Huanggangshui Fault previously identified in the offshore region. Integrating our results with previous field geological surveys and shallow reflection seismic exploration, we interpret the LVZ as a wide fault zone, potentially comprising multiple fault branches that possibly includes two NW-trending faults (i.e., the Rongjiang Fault and the Hanjiang Fault). Notably, the interaction between the Huanggangshui Fault and NE-trending Littoral Fault is suggested to have triggered the 1918 M7.3 Nan’ao earthquake. Additionally, the 1895 M6.2 earthquake seems to occur at the edge of the LVZ near the Rongjiang Fault, a possible branch of the Huanggangshui Fault, further supporting the association between this structure and seismic activity. These findings imply that the LVZ may represent a region of concentrated tectonic stress, making it a potential site for future strong earthquakes. Consequently, this area should be prioritized in seismic hazard assessments. This study provides valuable insights into the seismogenic characteristics of the Shantou region and contributes to improving seismic hazard evaluations in South China.

关键词： Intraplate earthquakes Nan’ao earthquake Shear-wave velocity Ambient noise tomography Dense seismic array

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Adaptive controller Design for Overhead Cranes With Moving Sliding Surface

Adaptive Controller Design for Overhead Cranes With Moving S...

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第三十八届中国控制会议

作者： Xiutao Gu Weimin Xu Mingming ZHANG Wanpeng ZHANG Yongshuang WANG Tianyu Chen Key Laboratory of Marine Technology and Control Engineering Ministry of Communications Shanghai Maritime University

An adaptive sliding mode control(ASMC) method with moving sliding surface(MSS) is proposed for anti-swing and positioning control of two-dimensional underactuated overhead crane in this paper. The designed moving sliding surface can change its slope in real time according to displacement error and speed error, thereby tracking performance of the trolley is improved. At the same time, a dynamic exponential term is added into the moving sliding surface so as to drive initial state variables into the sliding surface quickly to ensure the global robustness of the crane system. Finally, the controller switching gain is adjusted by an adaptive control law, which can effectively reduce chattering phenomenon occurring in the phase of sliding mode control. The controller can realize rapid positioning of the trolley and anti-swing control of the load under the condition of rope length changing. The global stability analysis of the suggested controller is given in the paper. The final simulation results confirm the effectiveness of the proposed controller.

关键词： overhead crane moving sliding surface adaptive switching gain sliding mode control chattering

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Communication and control Co-Design for Heterogeneous Industrial IoT: A Logic-Based Stochastic Switched System Approach

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IEEE Journal on Selected Areas in communications 2025年

作者： Wang, Shuling Zhu, Shanying Chen, Cailian Shen, Fei Zhang, Weihai Guan, Xinping Shanghai Jiao Tong University Department of Automation Shanghai200240 China Ministry of Education of China Key Laboratory of System Control and Information Processing Shanghai200240 China Chinese Academy of Sciences Key Laboratory of Wireless Sensor Network and Communications Shanghai Institute of Microsystem and Information Technology Shanghai200050 China Shandong University of Science and Technology College of Electrical Engineering and Automation Qingdao266590 China

With the development of Industry 4.0, mobile agents are deployed to coordinate with multi-loop control systems to perform manufacturing tasks, leading to heterogeneous Internet of Things (IoT). Due to shadow fading induced by the movement of mobile agents, the wireless channel closing the control loops is inherently unreliable, which can compromise the control system performance. This paper addresses the co-design problem of transmission scheduling and agents' movement to ensure both control performance and energy efficiency. A generalized cyber-physical-agent framework is proposed to capture the coupling between IoT systems and a mobile agent through a state-dependent fading channel. Moreover, the movement of the mobile agent among areas exhibiting different levels of shadow effects is modeled by Markov decision process. To address such heterogeneous dynamics, the co-design problem is formulated into the optimization of a logic-based stochastic switched system by utilizing the semi-tensor product technique. Based on state mergence and H-representation methods, a tractable and effective algorithm is then proposed to design co-design policies, minimizing the average joint cost of communication and control. A parallel scheme is further developed to alleviate the computation burden of the algorithm. Theoretical guarantees are provided to ensure control system performance. Finally, simulation results are given to demonstrate effectiveness of the proposed method. © 1983-2012 IEEE.

关键词： Fading channels

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Model Reference Adaptive Sliding Mode control of Overhead Crane with Uncertainties

Model Reference Adaptive Sliding Mode Control of Overhead Cr...

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第三十八届中国控制会议

作者： Mingming Zhang Weimin Xu Xiutao Gu Wangpeng zhang Yongshuang Wang Key Laboratory of Marine Technology and Control Engineering Ministry of Communications Shanghai Maritime University

The aim of overhead crane control is to transport the payload to the desired location rapidly and accurately while simultaneously eliminating *** this end,a Model Reference Adaptive Sliding Mode control(MRASMC)is proposed for overhead crane systems with ***,the MRASMC method does not require prior knowledge of the model parameters and friction,whereas this requirement is usually needed in conventional *** comparison with Sliding Mode control(SMC),the proposed method has stronger robustness with respect to extraneous ***,an adaptive sliding mode controller with a moving surface is designed to avoid the tradeoff between steady-state error and chattering *** techniques are utilized to prove the convergence and stability of the closed-loop *** results are presented to illustrate the effectiveness of the proposed controller.

关键词： overhead crane sliding model control model reference adaptive control uncertainties

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3D Hierarchical Refinement and Augmentation for Unsupervised Learning of Depth and Pose from Monocular Video

arXiv

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arXiv 2021年

作者： Wang, Guangming Zhong, Jiquan Zhao, Shijie Wu, Wenhua Liu, Zhe Wang, Hesheng Department of Automation Institute of Medical Robotics Key Laboratory of System Control and Information Processing Ministry of Education Key Laboratory of Marine Intelligent Equipment and System of Ministry of Education Shanghai Engineering Research Center of Intelligent Control and Management Shanghai Jiao Tong University Shanghai200240 China Department of Engineering Mechanics Shanghai Jiao Tong University Shanghai200240 China Department of Computer Science and Technology University of Cambridge CambridgeCB2 1TN United Kingdom

Depth and ego-motion estimations are essential for the localization and navigation of autonomous robots and autonomous driving. Recent studies make it possible to learn the per-pixel depth and ego-motion from the unlabeled monocular video. A novel unsupervised training framework is proposed with 3D hierarchical refinement and augmentation using explicit 3D geometry. In this framework, the depth and pose estimations are hierarchically and mutually coupled to refine the estimated pose layer by layer. The intermediate view image is proposed and synthesized by warping the pixels in an image with the estimated depth and coarse pose. Then, the residual pose transformation can be estimated from the new view image and the image of the adjacent frame to refine the coarse pose. The iterative refinement is implemented in a differentiable manner in this paper, making the whole framework optimized uniformly. Meanwhile, a new image augmentation method is proposed for the pose estimation by synthesizing a new view image, which creatively augments the pose in 3D space but gets a new augmented 2D image. The experiments on KITTI demonstrate that our depth estimation achieves state-of-the-art performance and even surpasses recent approaches that utilize other auxiliary tasks. Our visual odometry outperforms all recent unsupervised monocular learning-based methods and achieves competitive performance to the geometry-based method, ORB-SLAM2 with back-end optimization. Copyright © 2021, The Authors. All rights reserved.

关键词： Robots

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Nano Biochar Triggers High Adsorption of Oxytetracycline in Aqueous Environment: Effects of Solution Conditions and Particle Aggregation

SSRN

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SSRN 2022年

作者： Jia, Wenqiang Pan, Xiangrui Song, Jiaying Wang, Jian Sun, Weikai Xin, Yanjun Yan, Qinghua Zhou, Chengzhi Zheng, Hao Liu, Guocheng Qingdao Engineering Research Center for Rural Environment College of Resource and Environment Qingdao Agricultural University Qingdao266109 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China Institute of Coastal Environmental Pollution Control College of Environmental Science and Engineering Key Laboratory of Marine Environment and Ecology Ministry of Education Frontiers Science Center for Deep Ocean Multispheres and Earth System Ocean University of China Qingdao266100 China Sanya Oceanographic Institution Ocean University of China Sanya572000 China

Physical disintegration of macro biochars in natural environments produces nano biochars, thus affecting environmental processes (e.g., adsorption, migration) of antibiotic contaminants. However, understandings about the relationships between adsorption behaviors of antibiotics and unique physicochemical colloidal properties of nano biochar are relatively limited. In this study, a nano biochar (NSD700) was prepared from sawdust-derived biochar (SD700) by a combination method of ball milling, sonication, and centrifugation to contrastively investigate their adsorption for oxytetracycline (OTC). NSD700 had similar chemical structure properties of carbon fraction with SD700, whereas NSD700 possessed greater surface area and better porosity. The maximal sorption capacity of OTC on NSD700 was 30.7 mg/g, 1.95 times greater than that on SD700 (10.4 mg/g), primarily benefiting from more exposed surfaces and pores. OTC adsorption on NSD700 was inhibited under acidic and alkaline condition, and the inhibiting effect was more significant in comparison with that on SD700. OTC sorption onto NSD700 gradually decreased with increasing concentration of Na+, but which was not observed onto SD700. Aggregation kinetic of NSD700 varying with Na+ concentration demonstrated that the inhibiting effect might be affiliated with the destabilization and aggregation of NSD700, which could cause the shield of adsorption sites. This study provided insights for antibiotic adsorption characteristics on nano biochar and will help understanding the process and fate of antibiotics in the biochar-remediated environment. © 2022, The Authors. All rights reserved.

关键词： Porosity

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STF-GCN: A Multi-Domain Graph Convolution Network Method for Automatic Modulation Recognition via Adaptive Correlation

arXiv

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arXiv 2025年

作者： Shao, Mingyuan Fu, Zhengqiu Li, Dingzhao Zhang, Fuqing Cai, Yilin Hong, Shaohua Cao, Lin Peng, Yuan Qi, Jie School of Electronic Science and Engineering Xiamen University Fujian Xiamen361005 China School of Informatics Xiamen University Fujian Xiamen361005 China The Key Laboratory of Southeast Coast Marine Information Intelligent Perception and Application Ministry of Natural Resources Xiamen361005 China Science and Technology on Underwater Test and Control Laboratory Liaoning Dalian116013 China

Automatic Modulation Recognition (AMR) is an essential part of Intelligent Transportation System (ITS) dynamic spectrum allocation. However, current deep learning-based AMR (DL-AMR) methods are challenged to extract discriminative and robust features at low signal-to-noise ratios (SNRs), where the representation of modulation symbols is highly interfered by noise. Furthermore, current research on GNN methods for AMR tasks generally suffers from issues related to graph structure construction and computational complexity. In this paper, we propose a Spatial-Temporal-Frequency Graph Convolution Network (STF-GCN) framework, with the temporal domain as the anchor point, to fuse spatial and frequency domain features embedded in the graph structure nodes. On this basis, an adaptive correlation-based adjacency matrix construction method is proposed, which significantly enhances the graph structure’s capacity to aggregate local information into individual nodes. In addition, a PoolGAT layer is proposed to coarsen and compress the global key features of the graph, significantly reducing the computational complexity. The results of the experiments confirm that STF-GCN is able to achieve recognition performance far beyond the state-of-the-art DL-AMR algorithms, with overall accuracies of 64.35%, 66.04% and 70.95% on the RML2016.10a, RML2016.10b and RML22 datasets, respectively. Furthermore, the average recognition accuracies under low SNR conditions from -14dB to 0dB outperform the state-of-the-art (SOTA) models by 1.20%, 1.95% and 1.83%, respectively. © 2025, CC BY.

关键词： Frequency domain analysis

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Research on control strategy of hybrid electric ship based on minimum equivalent fuel consumption

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IOP Conference Series: Earth and Environmental Science 2021年第3期632卷

作者： Han Liu Yucheng Wang Diju Gao Shanghai Maritime University Key Laboratory of Shipping Technology and Control Engineering Ministry of Communications Shanghai 201306 China

In order to improve the economy of the hybrid electric-electric ship, the parallel hybrid electric ship is taken as the research object, and an energy control strategy of the electric-electric hybrid ship based on the minimum equivalent fuel consumption is proposed. The efficiency factor and its correction function are used to maintain the balance of battery power, and the target optimization function is adjusted to control the power consumption rate of the power battery, thereby realizing the optimization of the control strategy for the traveling ship. Finally, Matlab/Simulink is used for simulation. The experimental results show that when the control strategy with the minimum equivalent fuel consumption is used, the fuel consumption is 1.95L less than the CD-CS-based strategy, and the fuel saving rate is 31.2%. At the same time, the engine and motor work Efficiency is greatly improved.

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