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Investigation on structural optimization of rotational hydrodynamic cavitation reactor with a tapered rotor for organic dyes degradation

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Chemical Engineering Research and Design 2025年 218卷 653-663页

作者： Liu, Huiyang Zhao, Jiejun Yu, Jianfeng School of Mechanical Engineering Jiangnan University Jiangsu Wuxi China Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology Jiangsu Wuxi China Textile Industrial Products Testing Center of Nanjing Customs District Jiangsu Wuxi China

Rotational hydrodynamic cavitation reactor (RHCR) has been demonstrated to offer significant advantages in wastewater treatment. The structure of RHCR requires further optimization to improve its effectiveness in organic pollutant degradation. A new RHCR with a tapered rotor and internal passages (RHCR-T) was designed. Cavitation in RHCR-T was generated by pressure changes and shear effects caused by the tapered rotor. The effects of structure parameters of RHCR-T on degradation performance were investigated by ozonation degradation experiments. With degradation rate and energy utilization efficiency as evaluation indicators, five structural parameters including axial indentation number, stator-rotor interaction distance, inclination angle of cavitation generation units, internal passage number, and internal passage diameter were studied. A degradation rate of 84.3 % for simulated dye wastewater was achieved within 18 minutes, with a pseudo first-order reaction rate constant of 0.099 min−1, and an electric energy per order of 120.7 kWh/order/m3. The energy consumption of RHCR-T is 68 % lower than that of the reported system combining hydrodynamic cavitation and ozonation, with the operating cost decreased by 14 %. The findings of this work demonstrate practicality and economics of the RHCR in the field of wastewater treatment. © 2025 Institution of Chemical Engineers

关键词： Ozonization

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Methanolysis of ammonia borane catalyzed by NiO-CuO heterostructured nanosheets:cooperation of visible light and oxygen vacancy

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Rare Metals 2025年第1期44卷 389-403页

作者： You-Xiang Shao Yuan-Zhong Li Xue-Qi Lian Xiao-Ting Che Qian-Yi Li Yu-Fa Feng Hui-Ze Wang Jin-Yun Liao Quan-Bing Liu Hao Li School of Chemistry and Materials Engineering Huizhou UniversityHuizhou 516007China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Changzhou UniversityChangzhou 213164China Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006China

Developing cost-effective and high-activity catalysts for the methanolysis of ammonia borane(AB)has attracted great attention in the field of hydrogen energy *** the modification of the electronic structure of the catalysts,external factors such as visible light irradiation can improve the efficiency of hydrogen production as *** the present study,a Z-scheme heterostructured VO-Cu_(0.5)Ni_(0.5)O catalysts were constructed by introducing a plenteous phase interface and oxygen vacancy(Vo).The catalytic activity of as-prepared VO-Cu_(0.5)Ni_(0.5)O toward AB methanolysis has been improved dramatically with the assistance of visible light *** turnover frequency(TOF)under visible light irradiation was measured to be 29_(mol)H_(2)·mol_(cat.)^(-1)·min^(-1),which is 1.4 times larger than the TOF in the absence of visible *** characterization experiments and density functional theory(DFT)calculations were conducted to unveil the causation of enhanced catalytic *** results demonstrated that the enhancement of the catalytic activity of VO-Cu_(0.5)Ni_(0.5)O originated from the electronic structure modification induced by the formation of heterojunctions,the introduction of oxygen vacancies,and the assistance of visible light *** formation of heterojunction and the introduction of oxygen vacancies provoked the upshift of the d-band center;while the visible light irradiation induced the photogenerated electrons to transfer from Cu to Ni sites at the *** electron structure modulation is beneficial for the construction of abundant active sites,thereby enhancing the adsorption of methanol on the Ni sites,which is considered as the rate-determine step for the methanolysis of *** strong interaction between Ni and O weakened the O-H bond of methanol,accelerating the methanolysis of *** results demonstrate the utilization of combined heterojunction,oxygen vacancy,and visible light to explore highly active

关键词： Ammonia borane Methanolysis Heterojunction Oxygen vacancy Density functional theory(DFT)calculation

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Experimental and Numerical Study on the Trailing Edge Cutback Cooling Characteristics with POD Analysis

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Journal of Thermal Science 2025年第3期34卷 834-849页

作者： LIU Jiajie WANG Pengfei WANG Pei LIU Jun DU Qiang WANG Haohan WANG Zhiguo SHEN Xin ZHU Junqiang Key Lab of Light-duty Gas-turbine Institute of Engineering TermophysicsChinese Academy of Sciences University of Chinese Academy of Sciences National Key Laboratory of Science and Technology on Advanced Light-duty Gas-turbine Research Center of Fluid Machinery Engineering and Technology Jiangsu University

This paper investigates the film cooling characteristics and flow structure of trailing edge cutback in turbine vanes,and explains the unsteady flow mixing mechanism of this cooling structure using Proper Orthogonal Decomposition（POD） *** Delayed Detached Eddy Simulation（DDES） turbulence model was used to obtain detailed information about the velocity and temperature field for the POD *** verify the accuracy of the numerical results,fast-response Pressure Sensitive Paint（PSP） and high-frequency Particle Image Velocimetry（PIV） experiments were also conducted,and the results achieved good *** the blowing ratio increases,the effectiveness η of the cutback's film cooling exhibits a "increase-decrease-increase" trend,with η reaching its minimum point at around a blowing ratio(Mslot) of *** kinds of coherent vortex structures are observed in the flow field at different blowing *** to the analysis using the POD method,the first and second order modes of a Karman-like vortex street are observed in the vicinity of the wall at various blowing *** coherent flow structure is directly related to the mixing intensity between the mainstream gas and the *** Mslot=0.75,these modes had the highest energy ratio and formed a stable dominant coherent structure in the flow *** the blowing ratio increases,the main characteristic modes in the temperature field gradually change,and the mode appears crescent-shaped when the effectiveness of film cooling is at its *** paper combines the vortex structure of the flow field to explain the flow field feature distribution at the lowest effectiveness point η and analyzes its impact on the film cooling characteristics of the protected surface.

关键词： film cooling Proper Orthogonal Decomposition (POD) shedding vortices trailing edge cutback unsteady flow mixing

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FWAF-VID: A Flapping-Wing Aggressive Flight Benchmark Dataset for Visual-Inertial Localization

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IEEE robotics and Automation Letters 2025年第6期10卷 6328-6335页

作者： Jiang, Jizhou Pan, Erzhen Xu, Wenfu Sun, Wei Ye, Jingyang Harbin Institute of Technology School of Robotics and Advanced Manufacture Shenzhen518055 China Guangdong Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics Shenzhen518055 China Guangdong Biomimetic Intelligent Unmanned System Engineering Technology Research Center Shenzhen518052 China

Accurate state estimation of micro aerial vehicles (MAVs) in high-speed and dynamic environments poses a significant challenge for visual-inertial odometry (VIO) algorithms. Flapping-wing aerial vehicles (FWAVs), as an emerging flight platform, have attracted significant attention for stealth capabilities and efficient flight characteristics. Despite the availability of numerous MAV visual-inertial datasets for six-degree-of-freedom (6-DoF) state estimation, these datasets are not applicable for FWAVs with pronounced vibrations and agile maneuverability. To address this gap, we propose a large-scale flapping-wing aggressive flight visual-inertial dataset FWAF-VID. It contains diverse integrations of synchronized onboard cameras and IMU sensors. A total of 28 sequences include static flapping, calibration, and real-world flights collected in outdoor and indoor environments. The 17 flight sequences feature variations in illuminations, speeds, trajectories, camera perspectives, and flight modalities. We provide precisely aligned ground truth RTK and UWB measurements for algorithm evaluation. Furthermore, a comprehensive benchmark comparison is conducted, qualitatively and quantitatively evaluating the positioning accuracy of state-of-the-art VIO algorithms. The experimental results indicate that despite the degradation in localization accuracy in high-dynamic environments, FWAF-VID can effectively support the further development of VIO algorithms for FWAVs. To the best of our knowledge, this is the first onboard benchmark dataset tailored for aggressive flight in flapping-wing airborne platforms. © 2025 IEEE.

关键词： Micro air vehicle (MAV)

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Asymmetric charge distribution boosts hydrogen evolution performance in two-dimensional MoO_(2)/MoS_(2)step heterostructure

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Carbon Energy 2025年第2期7卷 172-182页

作者： Mengke Kang Xiang Zhang Jingyi Wang Wen Li Tianyu Xue Kun Zhai Jianyong Xiang Anmin Nie Yingchun Cheng Zhongyuan Liu Center for High Pressure Science State Key Lab of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdaoChina Key Laboratory of Flexible Electronics&Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjingChina Department of Chemistry Illinois Institute of TechnologyChicagoIllinoisUSA

Step heterostructures are predicted to hold a profound catalytic performance because of the rearranged electronic structure at their ***,limitations in the morphology of heterostructures prepared by hydrothermal reactions or molten salt-assisted strategies make it challenging to directly assess charge distribution and evaluate a single interface's hydrogen evolution reaction(HER)***,we prepared two-dimensional MoO_(2)/MoS_(2) step heterostructures with a large specific surface area by the chemical vapor deposition *** Kelvin probe force microscopy and electrical transport measurement verified the asymmetric charge distribution at a single *** fabricating a series of micro on-chip electrocatalytic devices,we investigate the HER performance for a single interface and confirm that the interface is essential for superior catalytic *** experimentally confirmed that the enhancement of the HER performance of step heterostructure is attributed to the asymmetric charge distribution at the *** work lays a foundation for designing highly efficient catalytic systems based on step heterostructures.

关键词： charge distribution chemical vapor deposition hydrogen evolution reaction interface step heterostructure

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Ytterbium-Catalyzed Tandem Diels-Alder/Claisen Rearrangement/Decarboxylation of Hetero-Allenes for the Synthesis of Diarylmethanes

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Chinese Journal of Chemistry 2025年第2期43卷 199-204页

作者： Bin Chen Shan Zhong Huilin Zhan Zhangyu Han Jianwei Sun Hai Huang Jiangsu Key Laboratory of Advanced Catalytic Materials&Technology School of Petrochemical EngineeringChangzhou UniversityChangzhouJiangsu213164 China Department of Chemistry The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongSAR999077 China

A tandem Diels–Alder reaction/Claisen rearrangement/decarboxylation strategy of N-allenamides (or aryloxyallenes) with 3-alkoxycarbonyl-2-pyrones has been developed for the efficient synthesis of diarylmethanes with moderate to good yields. The reaction exhibits good functional group tolerance and can be applied to late-stage modifications of known drug molecules. Mechanistic studies indicate that the ester group at the 3-position of 2-pyrones is essential, and the initial Diels–Alder reaction between the 2-pyrones and the proximal C=C bond of the N-allenamides (or aryloxyallenes) is crucial for the success of the reaction.

关键词： Hetero-allenes 2-Pyrones Diels-Alder reaction Claisen rearrangement Decarboxylation Tandem reaction

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Multi-anion electrolyte modulates the interactions in solvation structure to construct robust lithium metal batteries

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Journal of Energy Chemistry 2025年第5期104卷 36-43页

作者： Ke-Feng Ren Yun-Fei Du Jia-Xin Guo Zhen-Hui Luo Xin Sun Wen-Bo Tang Tian-Qi Li Cong Guo Weizhai Bao Feng Yu He Liu Xin-Bing Cheng Jingfa Li Jiangsu Key Laboratory of New Energy Devices&Interface Science School of Chemistry and Materials ScienceNanjing University of Information Science and TechnologyNanjing 210044JiangsuChina Z Energy Storage Center Key Laboratory of Energy Thermal Conversion and Control of Ministry of EducationSchool of Energy and EnvironmentSoutheast UniversityNanjing 211189JiangsuChina Tianmu Lake Institute of Advanced Energy Storage Technologies Liyang 213300JiangsuChina

Designing anion-dominated weak solvation structures is often achieved by elevating the concentration of Li ***,this is accompanied by the increase in the ***,a medium concentration electrolyte (1 M) with weak solvation structures is established by the multi-anion *** anions in the electrolyte strengthen the anion-solvent interactions through stronger ion–dipole *** reduces the quantity of free solvent and improves the reduction resistance of *** addition,the Li ion–solvent interaction is weakened,facilitating the anions to enter the solvation sheaths of Li *** multi-anion-dominated weak solvation structures boost Li ion diffusion in the electrolyte,accelerate the desolvation process of Li ions,and induce inorganic-rich solid electrolyte interphase and uniform Li *** average Coulombic efficiency of 99.1%for repeated Li plating/stripping can be ***||LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cells with a high cathode loading of 3.0 m A h cm^(-2) can maintain a capacity retention as high as 95% after 150 *** finding provides novel standpoints to modulate the interaction of solvation structures and extend the lifespan of high-energy–density Li metal batteries.

关键词： Lithium metal battery Multi-anion electrolyte Weak solvation structure Desolvation Solid electrolyte interphase

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Multi-particles micromanipulation in focused sound field for single-beam acoustic tweezer

Multi-particles micromanipulation in focused sound field for...

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2024 International Conference on Mechatronic Engineering and Artificial Intelligence, MEAI 2024

作者： Zhu, Guolong Li, Bo Xu, Junlei Zhang, Lue Sun, Lining School of Mechanical and Electric Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow University Suzhou215137 China

ISBN: (纸本)9781510689176

In this paper, for the prediction of sound field distribution, a spherical piezoelectric transducer is designed for focused acoustic field according to piezoelectricity equation and vibration analysis. Based on the predicted acoustic fields distribution, the Acoustic Radiation Force(ARF) of the particles with different material and different sizes are obtained, according to a perturbation expansion of the acoustic fields in fluid. Besides, the trapping and micro-manipulation of particles are realized perpendicular to the acoustic axis through experimental according to the predicted ARF. © 2025 SPIE.

关键词： Acoustic fields

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Complete Gait Phase Recognition Based on Muscle Synergy Using PSO-CNN-LSTM Algorithm

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IEEE Sensors Journal 2025年第10期25卷 16775-16786页

作者： Zhang, Kewen Li, Xiaoling Chen, Xin Yu, Longjie Jin, Yinan Fan, Bingfei Du, Mingyu Bao, Guanjun Wu, Xinyu Cai, Shibo Zhejiang University of Technology College of Mechanical Engineering Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education and Zhejiang Province Hangzhou310023 China Zhejiang University of Technology College of Mechanical Engineering Hangzhou310023 China ZJUT Yinhu Research Institute of Innovation and Entrepreneurship Zhejiang University of Technology Fuyang Hangzhou310023 China Shenzhen Institutes of Advanced Technology Guangdong Provincial Key Laboratory of Robotics and Intelligent System Chinese Academy of Sciences Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institutes of Advanced Technology Shenzhen518055 China

Accurately recognizing gait phases, by applying proper instrumentation and measurement, is significant in walking rehabilitation training for patients with impaired mobility. In this study, seven phases of complete stand-walk–stand cycle as well as continuous daily walking were recognized based on muscle synergy and particle swarm optimization (PSO)-convolutional neural network (CNN)-long short-term memory (LSTM) model. First, the complete stand-walk–stand walking cycle was divided into starting phase, terminal swing phase, loading response phase, mid-stance phase, terminal stance phase, initial swing phase, and stopping phase, based on the features of surface electromyography (sEMG) collected by portable sEMG acquisition system and measured motion data of lower limb. Second, a muscle weight matrix and an activation sequence matrix were calculated by using nonnegative matrix factorization (NMF). Finally, a PSO-CNN-LSTM network was designed to recognize the complete stand-walk–stand cycle by applying the abovementioned matrices as input. Fourteen subjects volunteered to perform linear walking experiments under procedure to verify the feasibility of the proposed approach by comparing results with other classifiers and features. Experimental results show that the proposed approach was capable of achieving an average recognition accuracy of up to 85.384%. This work will offer a promising gait recognition method for rehabilitation robots to achieve natural and flexible human-robot interaction. © 2001-2012 IEEE.

关键词： Non-negative matrix factorization

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RGB-D visual saliency detection of stacked fruits under poor lighting

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International Journal of Agricultural and Biological Engineering 2025年第1期18卷 230-237页

作者： Chunjian Hua Xintong Zou Yi Jiang Jianfeng Yu Ying Chen School of Mechanical Engineering Jiangnan UniversityWuxi 214122JiangsuChina Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment&Technology Jiangnan UniversityWuxi 214122JiangsuChina School of Internet of Things Engineer Jiangnan UniversityWuxi 214122JiangsuChina

The saliency detection of the same kind of stacked fruits can assist robots in completing sorting tasks,which is an important prerequisite for the grading and packing of *** order to accurately obtain saliency targets of fruits in the same kind of stacked state under overexposure,non-uniform illumination,and low illumination,a method for detecting stacked fruits under poor illumination based on RGB-D visual saliency was *** on the Res2Net network,features from each layer of two images were *** realize the complementary advantages between RGB features and depth features,the input RGB images were preprocessed using depth weighting to obtain purified RGB *** increase the information interaction between branches of different scales and better balance the fusion features and modal exclusive features,a multi-scale progressive fusion module was *** minimize the difference between the initial saliency maps generated by different features and improve the accuracy of the final predicted saliency maps,a multi-branch hybrid supervised method was *** comprehensive experiments on the self-made dataset of the same kind of stacked fruits show that the proposed algorithm is superior to five state-of-the-art RGB-D SOD methods in four key indicators:S value,F value,and MAE value,which are 0.979,0.992,and 0.006,respectively,and the P-R curve,which is also closer to the upper right corner of the *** values demonstrate that the proposed algorithm can accurately obtain saliency targets in the same kind of stacked *** results of this study can promote the automatic development of the fruit production and packaging industry.

关键词： RGB-D salient object detection multi-branch fusion depth weighting mixed supervision same kind of stacked fruits

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