著者
石川 昌明
出版者
一般社団法人 システム制御情報学会
雑誌
システム制御情報学会論文誌 (ISSN:13425668)
巻号頁・発行日
vol.30, no.4, pp.115-121, 2017-04-15 (Released:2017-07-15)
参考文献数
12
被引用文献数
1 1

The purpose of this paper is to propose the stochastic infectious model with time delay and to study the stability of the disease-free steady state. In the realistic spread of the infectious disease, environmental change and individual difference cause some kinds of random fluctuations in the model parameters. Moreover, in the vector-borne diseases such as malaria and dengue fever, there exists time delay caused by an incubation period in the virus development in the vectors (mosquitoes) on the transmission of disease. Taking these facts into consideration, we propose a stochastic SIR(susceptible-infected-recovered) model with time delay. We analyze stability of the disease-free steady state, and study the influence of time delay and the random noise on the stability by numerical simulations.
著者
亀本 大貴 橋本 智昭 加嶋 健司 大塚 敏之
出版者
一般社団法人 システム制御情報学会
雑誌
システム制御情報学会論文誌 (ISSN:13425668)
巻号頁・発行日
vol.27, no.10, pp.405-411, 2014-10-15 (Released:2015-01-22)
参考文献数
7
被引用文献数
4 1

In this study, we investigate the control problem of the load frequency of electric power systems that consist of consumers, suppliers, generators and the independent system operator. For this purpose, we adopt the model predictive control method, in which the control performance over a finite future is optimized repeatedly. The objective of this study is to provide an optimal electric price operation for achieving the steady-state of electric power systems with taking into account both benefits of consumers and suppliers.