Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2022-06-06 Cooperative journals: 《计算机应用研究》
Abstract： In the practical application of medical service system, under the short supply of doctor seats, traditional double-queue independent queuing system is inadequate for sufficient utilization of hospital resources. In this regard, we built a dynamic system to allocate reasonably the capacity of each outpatient queuing system without increasing the current hospital resources. Furthermore, we modeled the dynamic overflow outpatient queuing system to improve the traditional double-queue independent queuing system, and considered the probability of exiting system under perceptual and rational factors to analyze accurately the real condition of system. With the help of ProModel, a flexible and reliable discrete event simulation software, we analyzed and compared visually the dynamic model with traditional outpatient queuing model. The simulation results show that the average queue length, waiting time of patients and other service indices of the new overflow queuing model are superior to those of traditional queuing model.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2020-09-28 Cooperative journals: 《计算机应用研究》
Abstract： Considering the two-level e-commerce supply chain composed of an e-commerce platform and a third-party logistics service provider as the research object, aiming at the moral hazard problem caused by the third-party logistics service provider's complete control of its own logistics service level, this paper analyzes the strategy of using blockchain to prevent the moral hazard of the third-party logistics service provider. With the help of the logistics service level monitoring framework based on blockchain, considering the two scenarios of adopting blockchain and not adopting blockchain, the Stackelberg game model between e-commerce platform and the third party logistics service provider under decentralized decision-making is established, and the changes of supply chain profits before and after the application of blockchain and the correlation with technology cost input are studied. After that, the correctness of the conclusion is verified by numerical analysis. The results show that when the cost input of blockchain is controlled within a certain range, the application of this technology can effectively reduce the moral hazard of the third-party logistics service providers, improve the profits of the whole supply chain, promote the improvement of the profits of each node of the supply chain, and help the healthy and orderly development of the supply chain.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2019-01-28 Cooperative journals: 《计算机应用研究》
Abstract： In the background of smart grid, in connection of the shortage of fossil energy and the high pressure of peak-time power supply, this paper developed a method of complementary power supply of photovoltaic and fossil fuel. It constructed a real-time pricing model of user-side microgrid based on social welfare maximization. In the model, the power supplier coordinated the two types of energy sources by real-time pricing. Besides, this paper designed a real-time pricing algorithm to solve the model. The simulation results show that compared with the large power grid using fossil energy alone, the complementary power supply mode can effectively reduce the power supply of fossil energy and electricity price in peak time slots, and enhances the social welfare. The method offers a reference for the effective management of smart grid in future.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-09-12 Cooperative journals: 《计算机应用研究》
Abstract： Blockchain is a distributed system, which uses peer to peer (P2P) network as the communication protocol of the blockchain network layer. The communication and verification mechanisms of P2P jointly constitute the cornerstone of the blockchain network layer. All nodes of P2P network share P2P network services, weakening or even without central server, and its unique features enable the blockchain system to break away from the central server to achieve truly distribution and decentralization. By the reading of the source code and the official documents, the paper analyzed P2P protocols of three main blockchain systems, Bitcoin, Ethereum and hyperledger fabric, in detail, discussed the P2P protocol of block chain in the change of the evolution process and analyzed the advantages and disadvantages of different protocols. The comparison puts forward an analysis standard and a quantitative evaluation. The comparison hopes to offer a useful inspiration and guidance for the research of blockchain network protocols in future.
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