Discrete Model of Three Interacting Pacemakers Taking into Account the Time of Refractoriness as Applied to The Activity of Cardiac Fibrillation

Although the teacher-student relationship has been addressed in some studies, the cooperation or reciprocal relations between teachers and students have not been explored sufficiently. In this paper, a difference equation model is applied to express the relationship, stability analysis at the positive steady state of the discrete model is done to verify that the performance output is not empty, and hypothesis testing is conducted to show the validity of the model by means of sample data from a college. Then some reasonable suggestions are proposed to improve the performance output of teachers and students.

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Development and experimental realization of an adaptive neural-based discrete model predictive direct torque and flux controller for induction motor drive

Applied Soft Computing ◽

10.1016/j.asoc.2021.107418 ◽

2021 ◽

Vol 108 ◽

pp. 107418

Author(s):

Abhimanyu Sahu ◽

Kanungo Barada Mohanty ◽

Rabi Narayan Mishra

Keyword(s):

Induction Motor ◽

Discrete Model ◽

Motor Drive ◽

Induction Motor Drive ◽

Experimental Realization

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Airline schedule buffers and flight delays: A discrete model

Economics of Transportation ◽

10.1016/j.ecotra.2021.100218 ◽

2021 ◽

Vol 26-27 ◽

pp. 100218

Author(s):

Jan K. Brueckner ◽

Achim I. Czerny ◽

Alberto A. Gaggero

Keyword(s):

Discrete Model ◽

Flight Delays ◽

Airline Schedule

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Doing Good Better: Impure Altruism in Green Apparel Advertising

Sustainability ◽

10.3390/su11205762 ◽

2019 ◽

Vol 11 (20) ◽

pp. 5762 ◽

Cited By ~ 3

Author(s):

So Young Song ◽

Youn-Kyung Kim

Keyword(s):

Data Analysis ◽

Product Quality ◽

Discrete Model ◽

Online Survey ◽

Marketing Strategies ◽

Theoretical Development ◽

Sustainable Lifestyle ◽

Impure Altruism ◽

Sustainable Behavior ◽

Communal Harmony

In this study, we identify impure altruism as a duality of altruistic and egoistic warmth. We examine how these feelings motivate consumers to buy green apparel in response to advertisements. We test the effectiveness of the message orientation and its interactivity with a beneficiary and propose modeling impure altruism as the reason why consumers purchase green apparel. The study uses a quasi-experiment to estimate a comparison effect among advertising stimuli. We conduct an online survey among US consumers that garnered 586 responses for the main data analysis. The results indicate that egocentric appeals increase perceived uniqueness and that human beneficiary appeals lead to higher communal harmony. The findings show that communal harmony and global wellbeing prompt altruistic warmth and that uniqueness and product quality encourage egoistic warmth. Notably, altruistic warmth contributes to egoistic warmth, which indicates the existence of impurely altruistic consumers. Both altruistic and egoistic warmth lead to the intention of purchasing green apparel. We recommend “feel-good” marketing strategies to publicize the benefits of a sustainable lifestyle. The study contributes to the theoretical development of sustainability and can serve as an extension of a discrete model of altruism and egoism on consumers’ sustainable behavior.

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Spatiotemporal Patterns Formed by a Discrete Nutrient-Phytoplankton Model with Time Delay

Complexity ◽

10.1155/2020/8541432 ◽

2020 ◽

Vol 2020 ◽

pp. 1-18

Author(s):

Feifan Zhang ◽

Wenjiao Zhou ◽

Lei Yao ◽

Xuanwen Wu ◽

Huayong Zhang

Keyword(s):

Steady State ◽

Time Delay ◽

Numerical Simulations ◽

Functional Response ◽

Bifurcation Analysis ◽

Discrete Model ◽

Continuous Model ◽

Spatiotemporal Patterns ◽

Homogeneous Steady State ◽

Simulation Results

In this research, a continuous nutrient-phytoplankton model with time delay and Michaelis–Menten functional response is discretized to a spatiotemporal discrete model. Around the homogeneous steady state of the discrete model, Neimark–Sacker bifurcation and Turing bifurcation analysis are investigated. Based on the bifurcation analysis, numerical simulations are carried out on the formation of spatiotemporal patterns. Simulation results show that the diffusion of phytoplankton and nutrients can induce the formation of Turing-like patterns, while time delay can also induce the formation of cloud-like pattern by Neimark–Sacker bifurcation. Compared with the results generated by the continuous model, more types of patterns are obtained and are compared with real observed patterns.

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