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Hospital Bed Allocation Strategy Based on queuing theory during the COVID-19 Epidemic

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Computers, Materials & Continua 2021年第1期66卷 793-803页

作者： Jing Hu Gang Hu Jiantao Cai Lipeng Xu Qirun Wang Department of Rehabilitation Medicine Children’s Hospital of Nanjing Medical UniversityNanjing210008China College of Science and Engineering Management Anhui University of TechnologyMa’anshan243002China Huai’an TCM Hospital Affiliated to Nanjing University of Chinese Medicine Huai’an223002China Department of Physics and Astronomy University College LondonLondon0044UK

During the current epidemic,it is necessary to ensure the rehabilitation treatment of children with serious *** the same time,however,it is essential to effectively prevent cross-infection and prevent infections from occurring within the hospital *** resolve this contradiction,the rehabilitation department of Nanjing Children’s Hospital adjusted its bed allocation based on the queuing model,with reference to the regional source and classification of the children’s conditions in the rehabilitation department *** original triple rooms were transformed into a double room to enable the treatment of severely sick children coming from other places.A M/G/2 queuing model with priority was also applied to analyze the state of patient ***,patients in Nanjing were also classified into mild and severe *** M/M/1 queuing model with priority was used for analysis of this situation,so that severely ill children could be treated in time while patients with mild symptoms could be treated at *** approach not only eases the bed tension in the ward,but also provides suitable conditions for controlling cross-infection.

关键词： COVID-19 bed allocation queuing theory

ETC Proportional Adjustment Model Based on queuing theory in the Case of Unmanned Vehicles

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ETC Proportional Adjustment Model Based on Queuing Theory in...

第36届中国控制会议

作者： Junjie Zhu Haoyu Lin Yuting Xiao Han Luo Dongdong Liu Pengfei Li College of Electrical and Information Engineering Hunan University College of Mathematics and Econometrics Hunan University School of computer and information Fuyang Normal University College of Computer Science and Electronic Engineering Hunan University

ISBN: (纸本)9781538629185

With the continuous breakthroughs of unmanned vehicle technology,a increasing number of unmanned vehicles will be added to the current traffic *** will the above situation influence the traffic,and how will we change the existing traffic system design program to help unmanned technology to improve people’s travel efficiency in a better way,have become urgent problems to be *** this paper,the model of queuing theory is applied to simulate and calculate the number of lanes of different toll stations,on which basis,the optimal proportional adjustment model of ETC（Electronic Toll Collection） is ***,the results of sensitivity analysis of the model show that it has an excellent robustness and reliability.

关键词： queuing theory unmanned vehicle ETC

Optimization of Airport Taxi queuing System based on queuing theory

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Optimization of Airport Taxi Queuing System based on Queuing...

作者： Yiwei Xu School of International Education North China Electric Power University

Taxi is one of the main means of transportation for passengers to and from the airport and urban areas, and optimizing the airport taxi queuing system is of great significance to improve the efficiency of riding and save the time cost of customers. To reasonable design queuing system, this paper determines the queuing mode of passengers based on the queuing theory. In addition, a cost decision model is established combining with the Taxi Multi-service Desk Asynchronous Vacation System to optimize the number of boarding points, make the sum of the cost of waiting time per unit time and the construction cost of a single boarding point the lowest.

关键词： queuing theory Cost Decision Model

Dynamic scheduling of intelligent Rail Guided Vehicle based on queuing theory

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Dynamic scheduling of intelligent Rail Guided Vehicle based ...

第32届中国控制与决策会议

作者： Dongyu Yan Shuangyun Xing Enbin Yang Meng Wang Wenbo Sun School of science Shenyang Jianzhu University

In the automated warehouse,the conveying system connects multi-layer shelves and external material delivery tools,and its efficiency is very important for the entire automated *** order to improve the efficiency of Guided Vehicle,the dynamic scheduling problem of Rail-Guided Vehicle（RGV） in the Guided Vehicle is ***,the key problems in dynamic scheduling of RGV are *** this basis,e M-plant is used to model the entire automated three-dimensional warehouse,so as to make further research on dynamic scheduling of RGV by means of simulation ***,shortest path generation,queuing theory and genetic algorithm are used to solve the ***,according to different situations and different Computer Number controllers（CNC） operation time,the scheduling mode of RGV is *** research results show that both the basic genetic algorithm and the improved genetic algorithm can be used to solve the model of large material flow,and an optimized scheduling scheme of multiple RGV can be obtained to improve the efficiency of the transportation ***,the improved genetic algorithm is more effective and can greatly improve the efficiency of the transportation system.

关键词： queuing theory Dynamic scheduling Goal programming Genetic algorithm

The Research of Multimedia Data Transmission Basis on the Inventory and queuing theory

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The Research of Multimedia Data Transmission Basis on the In...

2012 National Conference on Information Technology and Computer Science

作者： Shen Jia-jie Computer center of School of Information Science & Technology East china normal university Shanghai,china

Aim to problem how the packet size effect to the multimedia data transmission and how to design the packet size to reach the best efficient of *** research is mainly to use the inventory and queuing theory find the best way to design the send packet *** the model is established and calculated,The best value have been *** experiment result also proof that exist best point of the packet size.

关键词： Multimedia transmission inventory theory queuing theory network efficiency

Coordinated Voltage Control of Distribution Network ConsideringMultiple Types of Electric Vehicles

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Energy Engineering 2024年第2期121卷 377-404页

作者： Liang Liu Guangda Xu Yuan Zhao Yi Lu Yu Li Jing Gao State Grid Jibei Electric Power Research Institute(North China Electric Power Research Institute Co. Ltd.)Beijing100045China

The couple between the power network and the transportation network(TN)is deepening gradually with the increasing penetration rate of electric vehicles(EV),which also poses a great challenge to the traditional voltage control *** this paper,we propose a coordinated voltage control strategy for the active distribution networks considering multiple types of *** the first stage,the action of on-load tap changer and capacitor banks,etc.,are determined by optimal power flow calculation,and the node electricity price is also determined based on dynamic time-of-use tariff *** the second stage,multiple operating scenarios of multiple types of EVs such as cabs,private cars and buses are considered,and the scheduling results of each EV are solved by building an optimization model based on constraints such as queuing theory,Floyd-Warshall algorithm and traffic flow *** the third stage,the output power of photovoltaic and energy storage systems is fine-tuned in the normal control *** charging power of EVs is also regulated in the emergency control mode to reduce the voltage deviation,and the amount of regulation is calculated based on the fair voltage control mode of ***,we test the modified IEEE 33-bus distribution system coupled with the 24-bus Beijing *** simulation results show that the proposed scheme can mitigate voltage violations well.

关键词： Electric vehicle transportation network voltage control queuing theory

Coordinated scheduling model for intermodal transit hubs based on GI/M^K/1 queuing system

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Journal of Central South University 2015年第8期22卷 3247-3256页

作者：贾洪飞曹雄赳杨丽丽 College of Traffic Jilin University

Coordinated scheduling of multimode plays a pivotal role in the rapid gathering and dissipating of passengers in transport hubs. Based on the survey data, the whole-day reaching time distribution at transfer points of passengers from the dominant mode to the connecting mode was achieved. A GI/M K/1 bulk service queuing system was constituted by putting the passengers' reaching time distribution as the input and the connecting mode as the service institution. Through queuing theory, the relationship between average queuing length under steady-state and headway of the connecting mode was achieved. By putting the minimum total cost of system as optimization objective, the headway as decision variable, a coordinated scheduling model of multimode in intermodal transit hubs was established. At last, a dynamic scheduling strategy was generated to cope with the unexpected changes of the dominant mode. The instance analysis indicates that this model can significantly reduce passengers' queuing time by approximately 17% with no apparently increase in departure frequency, which provides a useful solution for the coordinated scheduling of different transport modes in hubs.

关键词： traffic engineering coordinated scheduling queuing theory intermodal transit hub headway

Parallel Algorithm Core: A Novel IPSec Algorithm Engine for Both Exploiting Parallelism and Improving Scalability

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Journal of Computer Science & Technology 2008年第5期23卷 792-805页

作者：程东年胡宇翔刘彩霞 National Digital Switching System Engineering & Technological Research Center

To deal with the challenges of both computation-complexity and algorithm-scalability posed to the design of an IPSec engine, we develop PAC （parallel algorithm core）, called PAC, employed in an IPSec engine, which can meet requirements of both exploiting parallelism existing in IPSec packets and offering scalability in both the scales and types of cryptographic algorithms. With three kinds of parallelism and two kinds of transparency defined, a novel hierarchy of the specifically-designed parallel structure for PAC is presented, followed by corresponding mechanisms. With a simulation, the scalability of PAC is examined. For the purpose of performance evaluation, a Quasi Birth-and-Death （QBD） process is then established to model a simplified version of the proposed PAC. Performance evaluation of PAC in terms of two representative measures, throughput and mean packet waiting time, is numerically investigated. A comparison study is done on a simulation basis. Conclusions are finally drawn for providing a helpful guideline for both the design and implementation of our proposal.

关键词： computer network architecture IPSec queuing theory parallel processing numerical analysis

Probabilistic model for remain passenger queues at subway station platform

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Journal of Central South University 2013年第3期20卷 837-844页

作者：许心越刘军李海鹰周艳芳 State Key Lab of Rail Traffic Control & Safety Beijing Jiaotong University School of Traffic and Transportation Beijing Jiaotong University

The remain passenger problem at subway station platform was defined initially,and the period variation of remain passenger queues at platform was investigated through arriving and boarding *** remain passenger queues at platform as dynamic stochastic process,a new probabilistic queuing method was developed based on probabilistic theory and discrete time Markov chain *** model can calculate remain passenger queues while considering different *** the stable or variable train arriving period and different platform crossing types,a series of model deformation research was carried *** probabilistic approach allows to capture the cyclic behavior of queues,measures the uncertainty of a queue state prediction by computing the evolution of its probability in time,and gives any temporal distribution of the *** with the actual data,the deviation of experimental results is less than 20%,which shows the efficiency of probabilistic approach clearly.

关键词： subway platform remain passenger queuing theory probabilistic theory Markov chain