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On the optimal harvesting of size-structured population dynamics

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Applied Mathematics(A Journal of Chinese Universities) 2013年第2期28卷 173-186页

作者： LIU Yan CHENG Xiao-liang HE Ze-rong department of mathematics Zhejiang University Institute of Operational Research and cybernetics Hangzhou Dianzi University

This work is concerned with a kind of optimal control problem for a size-structured biological population ***-posedness of the state system and an adjoint system are proved by means of Banach＇s fixed point *** and uniqueness of optimal control are shown by functional analytical *** conditions describing the optimal strategy are established via tangent and normal cones *** results are of the first ones for this novel structure.

关键词： Body size population model optimal harvest maximum principle normal cone.

Data-Driven Self-Learning Controller for Power-Aware Mobile Monitoring IoT Devices

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Computers, Materials & Continua 2022年第2期70卷 2601-2618页

作者： Michal Prauzek Tereza Paterova Jaromir Konecny Radek Martinek VSB–Technical University of Ostrava Department of Cybernetics and Biomedical EngineeringOstrava70800Czech Republic

Nowadays,there is a significant need for maintenance free modern Internet of things(IoT)devices which can monitor an *** devices such as these are mobile embedded devices which provide data to the internet via Low Power Wide Area Network(LPWAN).LPWAN is a promising communications technology which allows machine to machine(M2M)communication and is suitable for smallmobile embedded *** paper presents a novel data-driven self-learning(DDSL)controller algorithm which is dedicated to controlling small mobile maintenance-free embedded IoT *** DDSL algorithm is based on a modified Q-learning algorithm which allows energy efficient data-driven behavior of mobile embedded IoT *** aim of the DDSL algorithm is to dynamically set operation duty cycles according to the estimation of future collected data values,leading to effective operation of power-aware *** presented novel solution was tested on a historical data set and compared with a fixed duty cycle reference *** root mean square error(RMSE)and measurements parameters considered for the DDSL algorithm were compared to a reference algorithm and two independent criteria(the performance score parameter and normalized geometric distance)were used for overall evaluation and *** experiments showed that the novel DDSL method reaches significantly lowerRMSE while the number of transmitted data count is less than or equal to the fixed duty cycle *** overall criteria performance score is 40%higher than the reference algorithm base on static confirmation settings.

关键词： 5G and beyond wireless IoT LPWAN M2M Q-learning

A three-stage approach for resilience-constrained scheduling of networked microgrids

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Journal of Modern Power Systems and Clean Energy 2019年第4期7卷 705-715页

作者： Saeed TEIMOURZADEH Osman Bulent TOR Mahmut Erkut CEBECI Adela BARA Simona Vasilica OPREA Engineering ProcurementResearch and Analysis(EPRA)Electric Energy Co.AnkaraTurkey department of Economic Informatics and cybernetics Faculty of CyberneticsStatistics and Economic InformaticsBucharest University of Economic Studies(BUES)BucharestRomania

This paper deals with optimal scheduling of networked microgrids(NMGs)considering resilience *** proposed scheme attempts to mitigate the damaging impacts of electricity interruptions by effectively exploiting NMG capabilities.A three-stage framework is *** Stage 1,the optimal scheduling of NMGs is studied through determining the power transaction between the NMGs and upstream network,the output power of distributed energy resources(DERs),commitment status of conventional DERs as well as demand-side *** Stage 2,the decisions made at Stage 1 are realized considering uncertainties pertaining to renewable generation,market price,power consumption of loads,and unintentional islanding of NMGs from the upstream network and *** 3 deals with uncertainties of unintentional islanding of each MG from the rest of islanded NMGs and *** problem is formulated as a mixed-integer linear programming problem and its effectiveness is assured by simulation studies.

关键词： Networked microgrid(NMG) Distributed energy resource(DER) Power system resilience Point estimate method

Minimizing makespan in a two-stage hybrid flow shop scheduling problem with open shop in one stage

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Applied Mathematics(A Journal of Chinese Universities) 2013年第3期28卷 358-368页

作者： DONG Jian-ming HU Jue-liang CHEN Yong department of Mathematics Zhejiang Sci-Tech University Institute of Operational Research and cybernetics Hangzhou Dianzi University

This paper considers a scheduling problem in two-stage hybrid flow shop, where the first stage consists of two machines formed an open shop and the other stage has only one machine. The objective is to minimize the makespan, i.e., the maximum completion time of all jobs. We first show the problem is NP-hard in the strong sense, then we present two heuristics to solve the problem. Computational experiments show that the combined algorithm of the two heuristics performs well on randomly generated problem instances.

关键词： hybrid flow shop open shop Heuristic algorithm.

Preference levels for clusters of alternatives

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International Journal of Modeling, Simulation, and Scientific Computing 2019年第4期10卷 1-19页

作者： Svetlana O.Smerchinskaya Nina P.Yashina Mathematical cybernetics department Moscow Aviation Institute 4 Volokolamskoe ShosseMoscow 125993Russia

In the decision-making tasks for ranking the alternatives and choosing the best ones,procedures on the digraphs are often used.A digraph of the aggregated relation on a set of alternatives for information of experts or criteria is *** the digraph does not contain any cycles,then the Demukron algorithm for partitioning the digraph into levels can be used to order the alternatives by *** algorithm cannot be applied if there are clusters consisting of equivalent *** the paper the algorithm for partitioning an arbitrary digraph of into preference levels is *** contrast to the standard procedure,the digraph of the aggregated relation admits the presence of cycles,and,consequently,of equivalent *** vertexes in any cycle of digraph belong to one level of preference.

关键词： Decision-making clusters of alternatives majority graph preference levels cycle of digraph preference relation ranking of alternatives

An algorithm for pairwise comparison of alternatives in multi-criteria problems

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International Journal of Modeling, Simulation, and Scientific Computing 2018年第1期9卷 159-167页

作者： Svetlana O.Smerchinskaya Nina P.Yashina Mathematical cybernetics department Moscow Aviation Institute Russia125993MoscowVolokolamskoe Shosse4

Difficult decisions and problems arise in almost all areas of human *** most tasks,the choice of the best alternatives is produced on the basis of task of numeral estimations of alternatives on the criteria of *** article considers the problem of multi-criteria choice with nonuniform scales of *** for pairwise comparison of alternatives,based on the construction of the criteria preference matrices,containing information on the degree of superiority of one alternative over another,is *** of aggregated relation,built for two criteria,is *** results,obtained using the method of additive convolution and the proposed algorithm,are compared.

关键词： Multi-criteria choice nonuniform scales of criteria preference matrix aggregated relation

Aggregation of preferences in attitude scales

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第4期12卷 156-170页

作者： Svetlana O.Smerchinskaya Nina P.Yashina Mathematical cybernetics department Moscow Aviation Institute Volokolamskoe Shosse 4Moscow 125993Russia

The problem of decision-making when evaluating alternatives according to several quality criteria is considered. Information is used about the pairwise comparison of alternatives by criteria: how many times one alternative is preferable to the other. The criteriamay have nonuniform scales. The method to form preferences matrices for representing numerical estimates of alternatives in attitude scales is proposed. The properties ofthe constructed relation are investigated. The algorithms for constructing the relationwith the minimum distance from the preferences by criteria are developed. An algorithm for constructing an aggregated relation based on the summation of preferencesby criteria is developed. Aggregate relation depends on the method of specifying thedistance between the matrices of preferences. The proposed algorithms for constructing an aggregated relation can use coefficients of importance of criteria. The methodcan be applied in collective choice problems when assigning estimates to alternativesby experts. A comparison of the proposed algorithms with each other and with knowndecision-making methods is carried out. The software system of multi-criteria choiceis developed. The task of choosing start-up projects for the purpose of investing by aventure fund has been solved.

关键词： Multi-criteria choice nonuniform scales of criteria preference matrix aggregated relation minimum distance

Classification of low-density EEG for epileptic seizures by energy and fractal features based on EMD

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The Journal of Biomedical Research 2020年第3期34卷 180-190页

作者： Luis Alfredo Moctezuma Marta Molinas department of Engineering cybernetics Norwegian University of Science and TechnologyTrondheim 7434Norway

We are here to present a new method for the classification of epileptic seizures from electroencephalogram(EEG) *** consists of applying empirical mode decomposition(EMD) to extract the most relevant intrinsic mode functions(IMFs) and subsequent computation of the Teager and instantaneous energy,Higuchi and Petrosian fractal dimension,and detrended fluctuation analysis(DFA) for each *** validated the method using a public dataset of 24 subjects with EEG signals from 22 channels and showed that it is possible to classify the epileptic seizures,even with segments of six seconds and a smaller number of channels(e.g.,an accuracy of0.93 using five channels).We were able to create a general machine-learning-based model to detect epileptic seizures of new subjects using epileptic-seizure data from various subjects,after reducing the number of instances,based on the k-means algorithm.

关键词： epileptic seizure electroencephalograms empirical mode decomposition detrended fluctuation analysis energy distribution fractal dimension

Digital twin in power system research and development:Principle,scope,and challenges

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Energy Reviews 2023年第3期2卷 84-98页

作者： Mohammed A.M.Yassin Ashish Shrestha Suhaila Rabie department of Electrical Engineering Information Technology and CyberneticsUniversity of South-Eastern NorwayPorsgrunnN-3918Norway

In order to address the issues that arise in modern power systems,such as system dynamics,stability,control,efficiency,reliability,economy,planning and policy,and so on,efforts have been made to develop new tools and techniques,components,methodologies,and scientific innovations in a variety of *** efforts have been undertaken to address these *** term“digital twin”(DT)refers to one of the most reliable and rapidly developing technologies that have recently been incorporated into a variety of applications,platforms,and realtime *** authors of this study offered a scoping review of DT technologies with a primary emphasis on power *** has been established that the underlying notion behind this technology,as well as its operating principle,types,communication channels and protocols,and standards,have all been thoroughly *** addition,the possibility of integrating other technologies with DT has also been considered,along with the potential benefits of doing so and the potential difficulties that may *** on the information gained from the current projects,the finished projects,the research publications,as well as the research and industry insights,a critical discussion has been made.

关键词： Communication channel Cyber-physical systems Digital twin Internet of things Machine learning