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Extension of Maxwell's equations for non-stationary magnetic fluids using gauss's divergence theorem

Results in engineering 2025年 26卷

作者： Bouzidi, Mohammed NASRI, Abdelfatah Rahmoune, Mohamed Ben Hafsi, Oussama Aeggegn, Dessalegn Bitew Ghoneim, Sherif S. M. Ali, Enas Ghaly, Ramy N. R. Department of Sciences and Technology University of Tamanghasset Sersouf P.O. Box 10034 Tamanghasset11001 Algeria Energy and Materials Laboratory University of Tamanghasset Sersouf P.O. Box 10034 Tamanghasset11001 Algeria Laboratory Smart Grid and Renewable Energy SGRE University Tahri Mohamed Bechar Algeria Algeria Applied Automation and Industrial Diagnostics Laboratory Faculty of Science and Technology University of Djelfa DZ 17000 Algeria DDI Laboratory Ahmed Draia University Adrar01000 Algeria Department of Electrical and Computer Engineering Debre Markos University Debre Markos269 Ethiopia Department of Electrical Engineering College of Engineering Taif University Taif21944 Saudi Arabia University Centre for Research and Development Chandigarh University Punjab Mohali140413 India Faculty of Engineering and Technology Future University in Egypt New Cairo11835 Egypt Ministry of Higher Education & Scientific Research Industrial Technical Institute-Mataria Technical College Cairo11718 Egypt Centre for Research Impact & Outcome Chitkara University Institute of Engineering and Technology Chitkara University Punjab Rajpura140401 India

The work presented in this paper focuses on formulating the development of time-dependent electromagnetic field laws through the application of Gauss's divergence theorem. The first part of the discussion looks at the basic ideas of electromagnetism. It focuses on how classical formulations of the laws of electromagnetism can be adapted to account for non-stationary conditions, especially regarding magnetic fluids that don't conduct electricity. It is suggested that employing Gauss's divergence theorem could help improve the computational analysis of these generalized equations, which would make them more useful in magnetic fluid dynamics. The paper examines the intricate interactions between non-conductive particles and conductive fluids under magnetic fields. By putting these interactions into a single theoretical framework, this work aims to help us understand non-stationary electromagnetic phenomena and how they affect many different scientific and engineering fields. The concluding section of the study examines the prospective practical applications of these extended equations. They could enable the development of more advanced electromagnetic devices and systems. Creating a strong set of analytical tools that can find new scientific paths and useful applications is the main goal of the study, particularly in the areas of electromagnetic induction and fluid dynamics. This research offers potential for substantial progress in both theoretical comprehension and technological advancement, The proposed method is applicable to real-world systems such as ferrofluid-based cooling, magnetic dampers, plasma generators, and smart electromagnetic devices. These applications demonstrate the practical benefits of coupling field behavior with boundary dynamics using Gauss's theorem. © 2025

关键词： Electromagnetic induction

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Research and prospect of multimedia information data mining

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Recent Patents on computer science 2017年第1期10卷 25-33页

作者： Hou, Yan Guo, Huiling Nevin, Nigel School of Computer Science and Technology Zhoukou Normal University ZhouKou China Faculty of Information Engineering and Automation Kunming University of Science and Technology KunMing China California University of Management CA United States

Background: In the increasingly large scale of the current multimedia information database, as described in various patents, big data technology is becoming more and more mature, and the problem of massive multimedia data mining is becoming more and more important. Method: In order to solve these problems through the analysis of the status for multimedia data mining, the general system structure in the application of multimedia information mining technology is analyzed, and the different methods and principles of text mining, image mining, video mining, web data mining in multimedia information data mining are made detailed analysis and the advantage and disadvantages are contrasted. Through the design of different experiments, the effectiveness and inferior of different methods are verified. Result: In the improved algorithm, the mining result of the multimedia text data based on correlation analysis is very different from the actual multimedia text data, the result is closer to the original mining image result, so this method is more practical. Conclusion: Through the summary and discussion on the problems existed in the current method, the faced challenges of multimedia information data mining technology are pointed out, to lay the foundation for the further development of the related technology. © 2017 Bentham science Publishers.

关键词： Data mining

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An Optimization Scheme for Consortium Blockchain in Airport Collaborative Decision Making 3

An Optimization Scheme for Consortium Blockchain in Airport ...

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3rd IEEE International Conference on Civil Aviation Safety and Information Technology, ICCASIT 2021

作者： Zhang, Xiaohui Miao, Xianghua Faculty of Information Engineering and Automation Kunming University of Science and Technology Kunming China Faculty of Information Engineering and Automation Kunming University of Science and Technology Computer Technology Application Key Lab of Yunnan Province Kunming China

ISBN: (纸本)9781665425186

Consortium blockchain-based A-CDM (Airport Collaborative Decision Making) was a decentralized technology solution proposed by some researchers in recent years to solve robustness, privacy, and security issues in the traditional centralized architecture. The key idea of blockchain-based A-CDM is to use blockchain technology to store the flight operation data in a distributed, consistent, and tamper-proof ledger, further improve the capability of flight management and reduce the trust barriers among the multi-stakeholders such as airport, air traffic management bureau, airlines, and ground service agency, etc. The RAFT consensus was adopted in many blockchain-based data sharing solutions to meet the need for efficiency in data transmission. However, the RAFT algorithm can only be used in a non-byzantine network because security requirements such as preventing malicious nodes are not fully considered. It will bring an immeasurable impact on flight operation when the leader node of RAFT-based A-CDM was caused by malicious control. In response to the above problems, this paper proposes an optimization scheme to improve the security performance of the consortium blockchain in A-CDM. © 2021 IEEE

关键词： Blockchain

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Fine-grained distributed averaging for large-scale radio interferometric measurement sets

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Research in Astronomy and Astrophysics 2021年第4期21卷 93-100页

作者： Shou-Lin Wei Kai-Da Luo Feng Wang Hui Deng Ying Mei Faculty of Information Engineering and Automation Computer Technology Application Key Lab of Yunnan ProvinceKunming University of Science and TechnologyKunming 650500China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China

The Square Kilometre Array(SKA)would be the world’s largest radio telescope with eventually over a square kilometre of collecting ***,there are enormous challenges in its data *** use of modern distributed computing techniques to solve the problem of massive data processing in the SKA is one of the most important *** this study,basing on the Dask distribution computational framework,and taking the visibility function integral processing as an example,we adopt a multi-level parallelism method to implement distributed averaging over time and *** Array was used to implement super large matrix or arrays with supported *** maximize the usage of memory,we further exploit the data parallelism provided by Dask that intelligently distributes the computational load across a network of computer agents and has a built-in fault tolerance *** validity of the proposed pattern was also verified by using the Common Astronomy Software Application(CASA),wherein we analyze the smearing effects on images reconstructed from different resolution visibilities.

关键词： techniques:interferometric methods:data analysis methods:numerical instrumentation:interferometers

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WSN Key Management Scheme Based on Fully Bomomorphic Encryption 29

WSN Key Management Scheme Based on Fully Bomomorphic Encrypt...

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第29届中国控制与决策会议

作者： Zhang Jing Ma Chen Fan Hongbo Computer Technology Application Key Lab of Yunnan Province Kunming University of Science and Technology Faculty of Information Engineering and Automation Kunming University of Science and Technology

ISBN: (纸本)9781509046584

Improving the safe WSN's real-time,energy consumption,and anti-leak is an important research *** on specific operations as addition,multiplication,and so *** homomorphic encryption can manipulate the ciphertext directly to get the correct results without *** fully homomorphic encryption's process of the decryption can be omitted,the safe WSN's characteristics such as real-time and so on can be improved *** management is an important problem of fully homomorphic encryption,in which the ability to anti-capture in WSN comes *** this paper,based on the calculation algorithm of two element symmetrical polynomials proposed by Blundo,we propose a pairwise key establishment scheme by introducing fully homomorphic encryption,which does not only prevent enemy intercepting information about polynomial relation,but also resist the large-scale node capture attack *** and experiments show that this scheme can totally meet the requirements of resource,energy consumption and so on of WSN,and improve the security of WSN at the meantime.

关键词： WSN homomorphic encryption key management

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An Improved Real-time Task Preemptive Scheduling In Cyber-Physical Systems 29

An Improved Real-time Task Preemptive Scheduling In Cyber-Ph...

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第29届中国控制与决策会议

作者： Zhang Jing Yang Xiaoduo Fan Hongbo Computer Technology Application Key Lab of Yunnan Province Kunming University of Science and Technology Faculty of Information Engineering and Automation Kunming University of Science and Technology

ISBN: (纸本)9781509046584

To improve the performance of real-time task scheduling and the utilization of the system resources in Cyber-Physical System,at the same time,to reduce the number of task switching,this paper improved traditional preemptive task scheduling,introduced the concept of buffer time and the guard time,made judgments when the task may need to switch to,according to the situation to retain the task which had lower priority but should not be suspended,and let the higher priority task wait for a ***,our research verifies the performance of the algorithm by examples and simulation experiments,demonstrates that the algorithm can optimize the performance of CPS,avoids the jitter caused by frequent task switching and its adverse effects on system performance,reduces the number of task switching,and improves the utilization of resources within the system to some extent.

关键词： CPS Task scheduling Buffer time Preemptive scheduling

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The Impact of Domain Name Server(DNS)over Hypertext Transfer Protocol Secure(HTTPS)on Cyber Security:Limitations,Challenges,and Detection Techniques

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computers, Materials & Continua 2024年第9期80卷 4513-4542页

作者： Muhammad Dawood Shanshan Tu Chuangbai Xiao Muhammad Haris Hisham Alasmary Muhammad Waqas Sadaqat Ur Rehman Faculty of Information Technology Beijing University of TechnologyBeijing100124China National Center of Robotics and Automation University of Engineering and TechnologyPeshawar25000Pakistan Department of Computer Science College of Computer ScienceKing Khalid UniversityAbha61421Saudi Arabia School of Computing and Engineering Sciences Faculty of Engineering and ScienceUniversity of GreenwichLondonSE109LSUnited Kingdom School of Engineering Edith Cowan UniversityPerthWA 6027Australia School of Computer Science and Engineering University of SalfordManchesterM54BRUnited Kingdom

The DNS over HTTPS(Hypertext Transfer Protocol Secure)(DoH)is a new technology that encrypts DNS traffic,enhancing the privacy and security of ***,the adoption of DoH is still facing several research challenges,such as ensuring security,compatibility,standardization,performance,privacy,and increasing user *** significantly impacts network security,including better end-user privacy and security,challenges for network security professionals,increasing usage of encrypted malware communication,and difficulty adapting DNS-based security ***,it is important to understand the impact of DoH on network security and develop newprivacy-preserving techniques to allowthe analysis of DoH traffic without compromising user *** paper provides an in-depth analysis of the effects of DoH on *** discuss various techniques for detecting DoH tunneling and identify essential research challenges that need to be addressed in future security ***,this paper highlights the need for continued research and development to ensure the effectiveness of DoH as a tool for improving privacy and security.

关键词： DNS DNS over HTTPS cybersecurity machine learning

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The Real-time Constraint Semantics of Events-driven State Transition for Embedded Control Systems 29

The Real-time Constraint Semantics of Events-driven State Tr...

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第29届中国控制与决策会议

作者： Zhang Jing Chen Yao Sun Jun Fan Hongbo Computer Technology Application Key Lab of Yunnan Province Kunming University of Science and Technology Faculty of Information Engineering and Automation Kunming University of Science and Technology

ISBN: (纸本)9781509046584

In this paper,we study the process of physical state transition in the embedded *** key to dramatically increase the efficiency of system is important to meet the deadline and the quality of task process for actors which were released the real-time events and were driven to transfer the state of the *** address these two goals at the same time,we defined a real-time events label of the value constraint and clock constraint conditions,and established a super dense time model contained constraint *** on partial order model to simulate the state time sequence order,we proposed a real-time semantics of the state transition for embedded control *** embedded system state transition constraint while supporting the value constraint was proposed,and this model validation under the clock constraint of events,was ensured real-time operation in the process of execution sequence what has a certain event and *** example of laser gyroscope blocking threshold test system is performed to evaluate the performance of the feedback controller in-depth research which has the effect of value constraint for the state transition of systems.

关键词： Embedded control Real-time events label State transition Constraint conditions Execution sequence

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The Research on Real-time Fault Diagnostic Method of Engine Embedded by GA Optimization and BP Neural Networks 29

The Research on Real-time Fault Diagnostic Method of Engine ...

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第29届中国控制与决策会议

作者： Zhang Jing Fu Xin Fan Hongbo Computer Technology Application Key Lab of Yunnan Province Kunming University of Science and Technology Faculty of Information Engineering and Automation Kunming University of Science and Technology

ISBN: (纸本)9781509046584

Embedded system real time measurement and representation method is widely used in industrial CPS control system application,such as engine fault *** malfunction diagnostic methods,which filter the changes in measurable parameters through Kalman filter and then map them to changes in performance parameters of the engine via neural network,have the weaknesses in that the neural network has a slow convergence rate and the optimum is prone to local ***,proposes an approach using genetic algorithm,which stands out in finding global optimum,to refine BP neural *** approach uses global optimum to refine the initial and threshold values of the neural network,decreasing the times of neural network trainings,and thus reducing the training error and lowering the time of *** simulation shows that the approach is feasible,improves the real-timing and error precision of malfunction diagnosis,and therefore is highly valuable in applications.

关键词： Back Propagation neural network genetic algorithm real-time fault diagnosis embedded aeroengines

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Spike detection and sorting using PARAFAC2 method 36

Spike detection and sorting using PARAFAC2 method

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2014 36th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2014

作者： Just, T. Weis, M. Husar, P. Technische Universität Ilmenau Faculty of Computer Science and Automation Institute of Biomedical Engineering and Informatics Ilmenau Germany

ISBN: (纸本)9781424479290

In this contribution we introduce the Parallel Factor 2 (PARAFAC2) analysis as a novel method for the simultaneous detection and classification of neural action potentials. In order to measure these action potentials (spike signals), stem cell derived neuronal cells are cultivated on the surface of a Micro Electrode Array (MEA). Here, the neuronal cells produce ion currents, which can be measured as extracellular electric potentials. Whenever a cell or a group of cells produces ion currents, either spontaneously or evoked by a stimulus, a spike signal can be measured by the electrodes of the MEA. Stimulated cells produce spikes and groups of spikes (bursts) which propagate in space over the MEA. In the recorded data, different source types (e.g., cells which respond directly to external stimuli and cells which are triggered by other neural cells) are characterized by different spike shapes. The proposed PARAFAC2 method is able to separate these spike shapes (sources) in time, frequency and space (channels) enabling an improved performance in noisy scenarios. Furthermore, PARAFAC2 allows for a causality analysis on the measured spike signals (i.e. the identification of different signal paths). Thereby, the PARAFAC2 decomposition is able to exploit the multi-dimensional structure of the MEA data. © 2014 IEEE.

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