With the invitation of Professor Wan-Tong Li of the school of mathematics and statistics of Lanzhou University, Professor Sanyi Tang of School of Mathematics and Information Science, Shaanxi Normal University, will visit our school from November 8, 2019 to November 9, 2019 to conduct academic exchanges and make an academic report.

Title：A THEORY ENCOMPASSING EXPERIMENTAL DESIGN AND DATA FITTING FOR HORMESIS AND ECOLOGICAL PARADOXES

Time：3:00 p.m.，November 8, 2019

Place：Qiyun building, Room 911

Abstract:Hormesis, involving biphasic responses to increasing amounts of a stimulation, challenges decision-making in management of cancer, neurodegenerative diseases, nutrition and ecotoxicology. A model, based on the Ricker equation with three critical parameters, revealed hormetic biphasic dose and timing responses, either in a J-shape or an inverted U-shape, yielding a homeostatic change or a catastrophic shift and hormetic effects in many parameter regions. Such effects were enhanced by multiple low-level stimulations, thereby reducing threshold levels, maximum responses and inhibition, thus providing insights into hormetic effects and showing how to reduce risks involved in dosage decisions for medical treatments. For ecological applications, data fitting demonstrates the effectiveness of our framework to use experimental data to inform intervention strategies for species with discrete generations under multiple impulsive interventions.

Provincial Key Laboratory of Applied Mathematics and Complex Systems, Gansu Province
School of mathematics and statistics
CuiyingHonors College
November 7th, 2019