نتایج جستجو برای: mathematical model of infectious diseases
تعداد نتایج: 21403033 فیلتر نتایج به سال:
Background and objective: Risk reduction is one of the pillars of sustainable development of society. The aim of the research is Validation of effective factors in crisis management of emerging infectious diseases with a focus on covid-19 disease so that the managers of the organizations can gain benefits while having a systemic thinking and a suitable management model while passing along with ...
due to lack of knowledge management system in the organization of technical and vocational university of iran (tvuni) and losing good employees because of retirement and substitution causes huge amount of costs to replace the similar expertise. there is no any suitable system in the tvuni to store, to document, and to distribute knowledge. based on the university’s features such as it has diffe...
abstract: in the paper of black and scholes (1973) a closed form solution for the price of a european option is derived . as extension to the black and scholes model with constant volatility, option pricing model with time varying volatility have been suggested within the frame work of generalized autoregressive conditional heteroskedasticity (garch) . these processes can explain a number of em...
Most mathematical models used to study the epidemiology of childhood viral diseases, such as measles, describe the period of infectiousness by an exponential distribution. The effects of including more realistic descriptions of the infectious period within SIR (susceptible/infectious/recovered) models are studied. Less dispersed distributions are seen to have two important epidemiological conse...
This paper analyses an SIRS-type model for infectious diseases with account for behavioural changes associated with the simultaneous spread of awareness in the population. Two types of awareness are included into the model: private awareness associated with direct contacts between unaware and aware populations, and public information campaign. Stability analysis of different steady states in th...
Mathematical modelling of infectious diseases has shown that combinations of isolation, quarantine, vaccine and treatment are often necessary in order to eliminate most infectious diseases. However, if they are not administered at the right time and in the right amount, the disease eliminationwill remain a difficult task. Optimal control theory has proven to be a successful tool in understandin...
Abstract In this paper, the main biological aspects of infectious diseases and their mathematical translation for modeling transmission dynamics are revised. particular, some heterogeneity factors which could influence fitting model to reality pointed out. Mathematical tools methods needed qualitatively analyze deterministic continuous-time models, formulated by ordinary differential equations,...
Transportation among regions is found as one of the main factors which affect the outbreak of diseases. It will change the disease dynamics and break infection out even if infectious diseases will go to extinction in each city without transport-related infection. In this paper, a mathematical model is proposed to demonstrate the dynamics of such disease propagation between two regions (or citie...
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