检索结果-内蒙古大学图书馆

The Ce-modified biochar for efficient removal of methylene blue dye:Kinetics,isotherms and reusability studies

Chinese Journal of Chemical engineering 2025年第1期77卷 57-65页

作者： Shuaishuai Zhang Xinan Sun Qingwen Luo Lin Chi Peng Sun Lianke Zhang School of Energy and Environment Inner Mongolia University of Science and TechnologyBaotou 014010China School of Automation and Electrical Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China

Exploring modification methods for enhancing the adsorption performance of biochar-based adsorbents for effective removal of methylene blue(MB),biochar-loaded CeO_(2)nanoparticles(Ce/BC)were synthesized by pomelo peels through co-precipitation combined with the pyrolysis ***/BC showed a higher specific surface area and disorder degree than that of *** 0.5Ce/BC(mass ratio of Ce(NO_(3))_(3)·6H_(2)O/BC=0.5/1)showed the best performance to adsorption of MB solution at different reaction conditions(MB concentration,Ce/BC composites dosage,and initial pH).Adsorption kinetics and equilibrium isotherms were well-described with a pseudo-first-order equation and Langmuir model,*** addition,the maximum adsorption capacity of 0.5Ce/BC for MB was 105.68 mg·g^(-1)at 328 *** strong adsorption was attributed to multi-interactions including pore filling,π-πinteractions,electrostatic interaction,and hydrogen bonding between the composites and *** work demonstrated that the modified pomelo peels biochar,as a green promising material with cost-effectiveness,exhibited a great potential for broad application prospectively to dyeing-contaminated wastewater treatment.

关键词： CeO_(2) Biochar Methylene blue Adsorption Stability

来源：评论

学校读者我要写书评

暂无评论

An autonomous dynamic recovery technology for autonomous underwater vehicles based on unmanned surface vehicles

引用

science China(Technological sciences) 2025年第2期68卷 315-317页

作者： Yueying WANG Yiqi SHI Guanghui WEN Huaicheng YAN School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444China Department of Systems Science School of MathematicsSoutheast UniversityNanjing 210096China School of Information Science and Engineering East China University of Science and TechnologyShanghai 200237China

Autonomous underwater vehicles(AUVs) have attracted considerable attention due to their vast potential applications, such as offshore oil exploration, underwater rescue, military reconnaissance, and marine scientific ... 详细信息

关键词： underwater autonomous battery

来源：评论

学校读者我要写书评

暂无评论

Design and Analysis of a Delta-Shaped Segmented Variable Leakage Flux Reverse-Salient Permanent Magnet Synchronous Machine for Electric Vehicles

引用

Progress in Electromagnetics Research C 2025年 152卷 197-208页

作者： Liu, Xiping Guo, Jiao Lu, Ruipan Liu, Zhangqi Sun, Baoyu School of Electrical Engineering and Automation Jiangxi University of Science and Technology Jiangxi Ganzhou341000 China

Since the traditional Delta-shaped motor is difficult to achieve the wide speed range while increasing the output torque, it cannot fully meet the complex working conditions of electric vehicles. This paper, from the driving conditions and the principle of variable leakage magnetism, based on the traditional Delta-shaped interior motor, designs a variable leakage flux permanent magnet synchronous motor with a segmented Delta-shaped rotor permanent magnet structure (VLF-DSPM). The permanent magnet is segmented into a magnetic bridge by a ferromagnetic material so that some magnetic lines do not pass through the permanent magnet but directly through the magnetic bridge to increase the d-axis inductance. A magnetic barrier is designed in the q-axis to achieve magnetic leakage in the high-speed region, thereby achieving a wide speed control range. In addition, since the utilization rate of the permanent magnet is reduced due to segmentation, the output torque is reduced. Therefore, transverse bar-shaped permanent magnets are added to increase the reluctance torque of the motor to achieve a higher resultant torque. The key parameters of this structure were then optimized, and finally the electromagnetic characteristics of the VLF-DSPM were studied using finite element analysis in comparison with a conventional Delta-shaped interior permanent magnet (DS-IPM) synchronous motor. The results show that the VLF-DSPM has better flux control capabilities, higher output torque, a wider speed range, and higher efficiency and power factor. © 2025, Electromagnetics Academy. All rights reserved.

关键词： Permanent magnets

来源：评论

学校读者我要写书评

暂无评论

Adaptive Control of a Flexible Manipulator With Unknown Hysteresis and Intermittent Actuator Faults

引用

IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 148-158页

作者： Shouyan Chen Weitian He Zhijia Zhao Yun Feng Zhijie Liu Keum-Shik Hong School of Mechanical and Electrical Engineering Guangzhou University the School of Control Science and Engineering Shandong University IEEE the College of Electrical and Information Engineering Hunan University the National Engineering Research Center for Robot Visual Perception and Control Technology Hunan University the School of Intelligence Science and Technology University of Science and Technology Beijing (USTB) the Institute for Future the School of AutomationQingdao University the School of Mechanical Engineering Pusan National University

In this study, we consider a single-link flexible manipulator in the presence of an unknown Bouc-Wen type of hysteresis and intermittent actuator faults. First, an inverse hysteresis dynamics model is introduced, and then the control input is divided into an expected input and an error compensator. Second,a novel adaptive neural network-based control scheme is proposed to cancel the unknown input hysteresis. Subsequently,by modifying the adaptive laws and local control laws, a fault-tolerant control strategy is applied to address uncertain intermittent actuator faults in a flexible manipulator system. Through the direct Lyapunov theory, the proposed scheme allows the state errors to asymptotically converge to a specified interval. Finally,the effectiveness of the proposed scheme is verified through numerical simulations and experiments.

关键词： Adaptive control flexible manipulator intermittent actuator faults inverse hysteresis dynamics vibration control

来源：评论

学校读者我要写书评

暂无评论

Bilevel Optimal Scheduling of Island Integrated Energy System Considering Multifactor Pricing

引用

Energy engineering 2025年第1期122卷 349-378页

作者： Xin Zhang Mingming Yao Daiwen He Jihong Zhang Peihong Yang Xiaoming Zhang School of Automation and Electrical Engineering Inner Mongolia University of Science and TechnologyBaotou014010China

In this paper,a bilevel optimization model of an integrated energy operator(IEO)–load aggregator(LA)is constructed to address the coordinate optimization challenge of multiple stakeholder island integrated energy system(IIES).The upper level represents the integrated energy operator,and the lower level is the electricity-heatgas load *** to the benefit conflict between the upper and lower levels of the IIES,a dynamic pricing mechanism for coordinating the interests of the upper and lower levels is proposed,combined with factors such as the carbon emissions of the IIES,as well as the lower load interruption *** price of selling energy can be dynamically adjusted to the lower LA in the mechanism,according to the information on carbon emissions and load interruption *** benefits and win-win situations are achieved between the upper and lower ***,CPLEX is used to iteratively solve the bilevel optimization *** optimal solution is selected according to the joint optimal discrimination *** results indicate that the sourceload coordinate operation can reduce the upper and lower operation *** the proposed pricingmechanism,the carbon emissions and load interruption power of IEO-LA are reduced by 9.78%and 70.19%,respectively,and the capture power of the carbon capture equipment is improved by 36.24%.The validity of the proposed model and method is verified.

关键词： Bilevel optimal scheduling load aggregator integrated energy operator carbon emission dynamic pricing mechanism

来源：评论

学校读者我要写书评

暂无评论

Chattering-Free Fault-Tolerant Cluster Control and Fault Direction Identification for HIL UAV Swarm With Pre-Specified Performance

引用

IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 183-197页

作者： Pei-Ming Liu Xiang-Gui Guo Jian-Liang Wang Daniel Coutinho Lihua Xie the Beijing Engineering Research Center of Industrial Spectrum Imaging School of Automation and Electrical Engineering University of Science and Technology Beijing the Shunde Graduate School of University of Science and Technology Beijing IEEE Autonomous Intelligent Systems Department Hangzhou Innovation Institute of Beihang University the Department of Automation and Systems Universidade Federal de Santa Catarina the School of Electrical and Electronic Engineering Nanyang Technological University

In this paper, the problem of pre-specified performance fault-tolerant cluster consensus control and fault direction identification is solved for the human-in-the-loop(HIL) swarm unmanned aerial vehicles(UAVs) in the presence of possible nonidentical and unknown direction faults(NUDFs) in the yaw *** control strategy begins with the design of a pre-specified performance event-triggered observer for each individual *** observers estimate the outputs of the human controlled UAVs, and simultaneously achieve the distributed design of actual control signals as well as cluster consensus of the observer *** is worth mentioning that these observers require neither the high-order derivatives of the human controlled UAVs' output nor a priori knowledge of the initial conditions. The fault-tolerant controller realizes the pre-specified performance output regulation through error transformation and the Nussbaum function. It should be pointed out that there are no chattering caused by the jump of the Nussbaum function when a reverse fault occurs. In addition, to provide a basis for further solving the problem of physical malfunctions, a fault direction identification algorithm is proposed to accurately identify whether a reverse fault has occurred. Simulation results verify the effectiveness of the proposed control and fault direction identification strategies when the reverse faults occur.

关键词： Chattering-free cluster consensus fault direction identification human-in-the-loop (HIL) nonidentical and unknown direction faults (NUDFs) pre-specified performance swarm unmanned aerial vehicles (UAVs)

来源：评论

学校读者我要写书评

暂无评论

Interference Suppression and Jitter Elimination Ability-Based Adaption Tracking Guidance for Robotic Fishes

引用

IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 126-137页

作者： Dongfang Li Jie Huang Rob Law Xin Xu Limin Zhu Edmond Q.Wu IEEE the School of Electrical Engineering and Automation Fuzhou University the Key Laboratory of System Control and Information Processing Ministry of Education the School of Electrical Engineering and Automation Fuzhou University 5G+Industrial Internet Institute Fuzhou University the University of Macau the College of Mechatronics and Automation National University of Defense Technology the School of Mechanical Engineering Shanghai Jiao Tong University the Department of Computer Science and Engineering Shanghai Jiao Tong University

This work presents an adaptive tracking guidance method for robotic fishes. The scheme enables robots to suppress external interference and eliminate motion jitter. An adaptive integral surge line-of-sight guidance rule is designed to eliminate dynamics interference and sideslip issues. Limited-time yaw and surge speed observers are reported to fit disturbance variables in the model. The approximation values can compensate for the system's control input and improve the robots' tracking ***, this work develops a terminal sliding mode controller and third-order differential processor to determine the rotational torque and reduce the robots' run jitter. Then, Lyapunov's theory proves the uniform ultimate boundedness of the proposed method. Simulation and physical experiments confirm that the technology improves the tracking error convergence speed and stability of robotic fishes.

关键词： Adaptive integral surge line-of-sight approximation robotic fish speed observer

来源：评论

学校读者我要写书评

暂无评论

Series-parallel Sequence Impedance Models of Multi-loop Grid-forming Converters

引用

Journal of Modern Power Systems and Clean Energy 2025年第1期13卷 29-41页

作者： Xiaokuan Jin Jianhua Wang Han Yan Xijun Ni Zhendong Ji Baojian Ji Ding Wan School of Electrical Engineering Southeast UniversityNanjing 210096China School of Electric Power Engineering Nanjing Institute of TechnologyNanjing 211167China School of Automation Nanjing University of Science and TechnologyNanjing 210094China

The gradual penetration of grid-forming(GFM)converters into new power systems with renewable energy sources may result in the emergence of small-signal instability *** issues can be elucidated using sequence impedance models,which offer a more tangible and meaningful interpretation than dq-domain impedance models and state-space ***,existing research has primarily focused on the impact of power loops and inner control loops in GFM converters,which has not yet elucidated the precise physical interpretation of inner voltage and current loops of GFM converters in *** paper derives series-parallel sequence impedance models of multi-loop GFM converters,demonstrating that the voltage loop can be regarded as a parallel impedance and the current loop as a series ***,the corresponding small-signal stability characteristics can be identified through Bode diagrams of sequence impedances or by examining the physical meanings of impedances in series and in *** results indicate that the GFM converter with a single power loop is a candidate suitable for application in new power systems,given its reduced number of control parameters and enhanced low-frequency performance,particularly in weak *** results of PLECS simulations and corresponding prototype experiments verify the accuracy of the analytical analysis under diverse grid conditions.

关键词： Grid-forming(GFM)converter sequence impedance renewable energy source small-signal stability

来源：评论

学校读者我要写书评

暂无评论

Transformer-based adaptive contrastive learning for multimodal sentiment analysis

引用

Multimedia Tools and Applications 2025年第3期84卷 1385-1402页

作者： Hu, Yifan Huang, Xi Wang, Xianbing Lin, Hai Zhang, Rong School of Cyber Science and Engineering Wuhan University Wuhan430072 China School of Electrical Engineering and Automation Wuhan University Wuhan430072 China

Multimodal Sentiment Analysis (MSA) plays a crucial role in discerning and analyzing the diverse attitudes and opinions of Internet users across various social media platforms. Nevertheless, existing sentiment analysis methods exhibit a text-centric bias, with the textual modality taking a predominant role in multimodal scenarios. In complex contexts, different unimodal information may exhibit inconsistent emotional tendencies, making it challenging to detect hidden sentiments such as ambiguity or irony when focusing primarily on the textual modality. To address these issues, we propose a Transformer-based multimodal modality enhancement network (MMEN) suitable for complex contexts. The primary objective is to emphasize shared information between modalities in multimodal fusion, encouraging modal synergy and avoiding the neglect of weaker modalities. Specifically, we employ multi-head attention mechanism for both unimodal feature extraction and multimodal fusion to obtain latent representations for multimodal sentiment analysis. Furthermore, an adaptive contrastive learning module is designed, utilizing fine-grained sentiment information to retain crucial emotional cues from unimodal sources and enhance semantic fusion. We introduce multi-task learning to dynamically adjust modal contributions. Experimental results on the public dataset CH-SIMSv2.0 demonstrate that the proposed model outperforms the baseline model in terms of accuracy and F1 score by 2.51% and 2.43% respectively. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2024.

关键词： Sentiment analysis

来源：评论

学校读者我要写书评

暂无评论

Scaled non-passive environmental interaction force tracking for telerobotic manufacturing system with variable time delay

引用

science China(Technological sciences) 2025年第3期68卷 167-178页

作者： Yukui ZHANG Fangyu PENG Yiming WAN Chen CHEN Zhitao GAO Haoyan LIU Yu WANG Rong YAN Xiaowei TANG School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan430074China School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan430074China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and TechnologyWuhan430081China

Robot teleoperation plays an important role in industrial manufacturing in unknown and dangerous environments beyond human *** telerobotic manufacturing tasks,environmental interaction forces may vary significantly from task to ***,it is crucial to provide operators with the specific proportional feedback of environmental interaction forces to enhance their environmental awareness and manipulation ***,variable time delays and various scales of environmental interaction force feedback seriously affect the system stability,which should be rigorously addressed when designing control *** cope with these difficulties,a position and scaled force tracking control framework is proposed and the LyapunovKrasovskii theory is used to obtain a simple algebraic stability criterion with the scaling factor of the environmental interaction force *** addition,a low-pass filter-based radial basis function neural network is designed to avoid the effect of the measurement noise and the sudden change of the non-passive environmental interaction force on the system *** with different controllers in various telerobotic manufacturing tasks such as heavy lifting,cutting,and polishing,our proposed method achieves better position and scaled force tracking performance.

关键词： non-passive interaction force position tracking scaled force tracking stability analysis telerobotic manufacturing system variable time delay

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：