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Int. J. Simul. Process. Model.最新文献

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Simulations of COVID-19 spread by spatial agent-based model and ordinary differential equations 基于空间主体模型和常微分方程的COVID-19传播模拟
Int. J. Simul. Process. Model. Pub Date : 2020-05-07 DOI: 10.1504/ijspm.2020.10029411
S. Bai
{"title":"Simulations of COVID-19 spread by spatial agent-based model and ordinary differential equations","authors":"S. Bai","doi":"10.1504/ijspm.2020.10029411","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10029411","url":null,"abstract":"The COVID-19 outbreak is currently the biggest public health issue in the world. In this paper, the epidemic spread is modelled via two structurally different approaches, a system of first-order ordinary differential equations (ODEs) and spatial agent-based model (ABM). Specific intervention strategies are introduced and the effectiveness of the strategies can be assessed by comparing the results with/without these strategies. The simulation results are qualitatively affected by different parameter settings of the ODEs-based model; hence precision of input parameters characterising the spread is of great importance. The implementation of spatial ABM brings novel features to the epidemics modelling: new states being easily incorporated; the parameter illustrating the moving willingness of people; and sub-models for hospital beds to reflect demands of medical resources. Our results suggest that the flexible characteristics of ABM render it a useful addition to the tool set of epidemics simulation models so as to figure out new effective strategies.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133612301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
An optimised steelmaking-continuous casting scheduling simulation system with unity 3D 基于unity 3D的优化炼钢-连铸调度仿真系统
Int. J. Simul. Process. Model. Pub Date : 2020-05-07 DOI: 10.1504/ijspm.2020.10029338
Liangliang Sun, Yaqian Yu, Hang Jin, Li Zhang, Tingting An
{"title":"An optimised steelmaking-continuous casting scheduling simulation system with unity 3D","authors":"Liangliang Sun, Yaqian Yu, Hang Jin, Li Zhang, Tingting An","doi":"10.1504/ijspm.2020.10029338","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10029338","url":null,"abstract":"This work considers the transportation time involved in ladle allocation during the steelmaking-continuous casting production. The optimisation problem of equipment allocation is presented, the optimal production sequence is determined and a schedule for charges is determined. In order to ensure that the operation time and the energy consumption are minimised, a solution methodology combining heuristic algorithm and conflict elimination algorithm is developed. The simulation experiment based on actual production data shows that this methodology can effectively solve the steelmaking and continuous casting scheduling problem. To validate the scheduling plan more intuitively and modify it further, we present an optimisation system based on unity 3D simulation platform. The system can effectively evaluate the optimisation of the solution and adjust the related data to modify the scheduling plan and ultimately get a reasonable rescheduling plan.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126510348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Modelling and implementation of an intelligent stowage simulator for container ships 集装箱船智能积载模拟器的建模与实现
Int. J. Simul. Process. Model. Pub Date : 2020-05-07 DOI: 10.1504/ijspm.2020.10029335
Qingwu Wang, Jian Zhao, Lin Ma
{"title":"Modelling and implementation of an intelligent stowage simulator for container ships","authors":"Qingwu Wang, Jian Zhao, Lin Ma","doi":"10.1504/ijspm.2020.10029335","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10029335","url":null,"abstract":"To solve the problems that conventional loading master for container ship merely provides the stability, strength, floating condition, etc. a comprehensive intelligent simulator was worked out, which can also obtain the amount of restowage containers, verify segregation scheme for dangerous containers, etc. BLOCK algorithm is proposed for the first time for restowage problems with respect to the containers on deck jam that in hold and all in hold or on deck. In the case of all in hold or on deck, independent stowage and mix stowage are studied in some detail. A fast and effective algorithm is also put forward to perform the segregation verifying. At last, the above proposed algorithms are verified by the loading condition from the loading manual.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124195855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Real-time health status evaluation for electric power equipment based on cloud model 基于云模型的电力设备健康状态实时评估
Int. J. Simul. Process. Model. Pub Date : 2020-04-22 DOI: 10.1504/ijspm.2020.10028724
W. Zhao, Min Cui
{"title":"Real-time health status evaluation for electric power equipment based on cloud model","authors":"W. Zhao, Min Cui","doi":"10.1504/ijspm.2020.10028724","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10028724","url":null,"abstract":"The health status evaluation of electric power equipment is an important issue with extensive concerns in power system community around the globe. In consideration of the uncertain characteristics of the monitoring data of wind turbines, a real-time health status evaluation method for wind turbines is presented employing the advantages of the cloud model in dealing with uncertain information. In the presented method, real-time data are analysed based on the well-established unsupervised clustering to partition the operational space. The health evaluation model is then trained based on the cloud model and cloud transformation, combining with SCADA historical state data and fully considering the uncertain information of wind turbines. The proposed model is applied to evaluate the health conditions of a 1.5 MW wind turbine located in northern China, and it is demonstrated that this model can detect the changing trend, and hence promote reliability of wind turbines, and reduce maintenance costs.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126044582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Modelling of ship collision avoidance behaviours based on AIS data 基于AIS数据的船舶避碰行为建模
Int. J. Simul. Process. Model. Pub Date : 2020-04-22 DOI: 10.1504/ijspm.2020.10028723
M. Gao, Guoyou Shi
{"title":"Modelling of ship collision avoidance behaviours based on AIS data","authors":"M. Gao, Guoyou Shi","doi":"10.1504/ijspm.2020.10028723","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10028723","url":null,"abstract":"The original automatic identification system (AIS) data are so large that they cannot be directly applied to learning and training, and the collision avoidance data must be filtered, identified, and extracted. AIS data from the Laotieshan channel in Dalian port, China, are used as raw data to identify successful cases of collision avoidance. Ship navigation statuses are screened according to AIS message codes. The improved density-based spatial clustering of applications with noise algorithm (DBSCAN) is used to cluster the four types of habitual routes of ship trajectory, with the rest of the data as candidate data for ship matching. Ship encounter situations are planned for 13 categories considering the ship light arc range and the requirements of the International Regulations for Preventing Collisions at Sea (COLREGs). The matched data utilise a sliding window algorithm for extracting ship navigation behaviour, which are then stored in the form of segmented ship trajectory unit sequences. This study suggests a new knowledge base of intelligent ship collision avoidance data, providing a novel method and theoretical guidance for future developments in ship collision avoidance methods.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124984871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Modelling and simulation of intelligent collision avoidance based on ship domain 基于船舶域的智能避碰建模与仿真
Int. J. Simul. Process. Model. Pub Date : 2020-04-22 DOI: 10.1504/ijspm.2020.10028720
Weifeng Li, Jiaxuan Yang, Xiaori Gao, Jiagen Yu
{"title":"Modelling and simulation of intelligent collision avoidance based on ship domain","authors":"Weifeng Li, Jiaxuan Yang, Xiaori Gao, Jiagen Yu","doi":"10.1504/ijspm.2020.10028720","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10028720","url":null,"abstract":"Intelligent collision avoidance systems can increase the safety of ship navigation and reduce the influence of human error. Thus, related technologies are critical to the development of the world's shipping industry. Risk of collision is a central concept in the Convention on International Regulations for Preventing Collision at Sea, 1972 (COLREGs). Collision risk is also a key factor in determining whether a collision avoidance action is required, specifically with regard to intelligent collision avoidance decisions. On the basis of the ship domain proposed by the Fujii, at first, this paper defined the risk of collision index λ, which can be used to measure the risks between owe ship ant the target ships, then, according to the COLREGs, categorised ship encounter types as head-on situation, crossing situation, and overtaking situation, and established the action flow charts of each of these situations, at last, with the permission of Dalian Maritime University, the training ships of Yu Peng and Yu Kun were selected as simulation objects, the paper presents simulations of head-on, crossing and overtaking situations to verify the usability of the proposed models.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114586726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Research on NOx emission of coal-fired unit based on multi-model clustering ensemble 基于多模型聚类集成的燃煤机组NOx排放研究
Int. J. Simul. Process. Model. Pub Date : 2020-04-21 DOI: 10.1504/ijspm.2020.10028718
Chenggang Zhen, Huaiyuan Liu, Hanyong Hao
{"title":"Research on NOx emission of coal-fired unit based on multi-model clustering ensemble","authors":"Chenggang Zhen, Huaiyuan Liu, Hanyong Hao","doi":"10.1504/ijspm.2020.10028718","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10028718","url":null,"abstract":"The predictive control of NOx emission generated by coal-fired units has an important impact on economic benefits of power station and control of environmental pollution. In order to enhance the accuracy of prediction model, a modelling method of boiler NOx emission based on voting multi-model soft clustering ensemble (VMSC) is proposed. The data space is divided into three sub-space according to the level of NOx emission, and the variables that participate in clustering are determined by using variable weight based on relevant analysis and hierarchical clustering utilised information entropy. The proposed algorithm VMSC is used to obtain new membership degree matrix of each sub-space. The multiple least squares support vector machine (LSSVM) models of each subspace are compromised by the least-squares method fused membership degree. The simulation results show that the VMSC algorithm which merges soft fuzzy C-means clustering (SFCM) and genetic algorithm-soft fuzzy C-means clustering (GA-SFCM) improve the accuracy of clustering, and the simulation performance is better than other selected models. The integrated model VMSC-LSSVM can achieve accurate prediction for NOx emission of utility boiler and effectively solve the problem that the model used single method to modelling is weak generalisation.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130503226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel method of reactive voltage optimisation for photovoltaic systems 一种新的光伏系统无功电压优化方法
Int. J. Simul. Process. Model. Pub Date : 2020-04-21 DOI: 10.1504/ijspm.2020.10028737
W. Zhang, Y. Zhang
{"title":"A novel method of reactive voltage optimisation for photovoltaic systems","authors":"W. Zhang, Y. Zhang","doi":"10.1504/ijspm.2020.10028737","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10028737","url":null,"abstract":"In this paper, a novel method is proposed for real-time adaptive reactive power optimisation of photovoltaic systems derived from the improved dynamic teaching and learning reactive power optimisation based on moth-flame optimisation algorithm. By constructing the mathematical model for the reactive power voltage control of a photovoltaic power station, learning is optimised continuously in the process of teaching and learning. According to real-time data, the optimal cooperation strategy between the RPVC/AVC control system and intelligent power grid command is formed, and real-time, adaptive and dynamic control of the system is realised. A simulation study is made in this paper, and the simulation results show that the proposed method is reasonable and effective for the 220 kV substation and its feeder system.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124194348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Simulation modelling and analysis of balance mechanisms of innovation search in innovation network 创新网络中创新搜索平衡机制仿真建模与分析
Int. J. Simul. Process. Model. Pub Date : 2020-04-21 DOI: 10.1504/ijspm.2020.10028716
Linling Xie, Tie Wei
{"title":"Simulation modelling and analysis of balance mechanisms of innovation search in innovation network","authors":"Linling Xie, Tie Wei","doi":"10.1504/ijspm.2020.10028716","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10028716","url":null,"abstract":"Based on the scale-free weighted dynamic network, this paper proposes an agent-based model to investigate the dynamics characterising the interaction between balance mechanisms of innovation search and the innovation network. Specifically, it explores how two balance mechanisms of innovation search, punctuated equilibrium and ambidexterity, influence the evolution of the growth of network knowledge and performance through the simulation of the three-stage innovation search processes in the innovation network. In addition, it considers and assesses the impact of the rate of knowledge diffusion. The results show that the balance mechanisms of innovation search and the innovation network are co-evolutionary. The balance mechanisms of innovation search have an impact on the growth of network knowledge and performance, and the rate of knowledge diffusion has a contingent effect. This study provides a valid theoretical analysis framework and approach for future research in balance mechanisms of search.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132267756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
XML-based DEVS modelling and simulation tracking 基于xml的DEVS建模和仿真跟踪
Int. J. Simul. Process. Model. Pub Date : 2020-04-21 DOI: 10.1504/ijspm.2020.10028738
Y. Dahmani, Hemza Nedjari Benhadj Ali, Abdelkader Boubekeur
{"title":"XML-based DEVS modelling and simulation tracking","authors":"Y. Dahmani, Hemza Nedjari Benhadj Ali, Abdelkader Boubekeur","doi":"10.1504/ijspm.2020.10028738","DOIUrl":"https://doi.org/10.1504/ijspm.2020.10028738","url":null,"abstract":"Discrete event system specification (DEVS) is a modelling and simulation formalism for discrete event dynamic systems. DEVS has known different variants and software implementations to meet specific needs. Unfortunately, these implementations do not necessarily share models and cannot capitalise on model reuse and data exchange. XML, as a meta-language, seems to be an appropriate language for helping modellers with weak programming knowledge. Indeed, XML is adopted as a standard for information exchange and knows an increasingly important use on the web. This work aims at determining an XML-based implementation of DEVS for devising an efficient modelling and simulation framework. After defining and validating our XML schemas, an execution step of these models is defined based on our XML abstract simulator which executes a set of XSLT transformations and generates an XML simulation tree describing the different steps of the system during the simulation time.","PeriodicalId":266151,"journal":{"name":"Int. J. Simul. Process. Model.","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121068142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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