报告题目1：On Some Mass Constraint Variational Problems

报告人：    朱新才  博士

报告时间：2018年10月9日（周二）16:30—17:00   

报告地点：数学与统计学院学术报告厅

报告摘要：This talk is concerned with minimizers of three mass constraint variational problems, including the existence and non-existence, mass concentration behavior and uniqueness of minimizers. For sub-critical problem, we firstly prove the equivalence between constraint minimizers and ground states of the related elliptic equation. We also present a detailed analysis on the blow-up behavior of nonnegative minimizers. Following these results, we finally prove the uniqueness of nonnegative minimizers as L²-norm tend to infinity, by establishing some local Pohozaev identities.

报告题目2：Application of the mathematical models in forest ecology

报告人：    彭舜磊  博士

报告时间：2018年10月9日（周二）17:00—17:30   

报告地点：数学与统计学院学术报告厅

报告摘要：The mathematical models were widely used in the forest ecology. Here, we focus on the applications of five types of the mathematical models including rainfall intensity duration frequency (IDF) curve for the prediction of runoff flow, species distribution model for the forest assemblage mechanism, Byes model for forest self thinning simulation, biomass allometric model with climate and wood density for accurate forest biomass predicting, and machine learning models integrated geographical information and remote sensing data for forest carbon prediction. We tested these mathematical models with our field measured data, and found that these mathematical models had good performance in our studies.

朱新才，博士，2018年于中国科学院武汉物理与数学研究所获理学博士学位，主要从事偏微分方程中的二阶非线性椭圆型方程的研究。在国内外重要学术期刊 Math. Methods Appl. Sci., Commun. Pure Appl. Anal.,  Mediterr. J. Math.,  Acta Math. Sci.,数学物理学报等发表学术论文5篇，另外在审论文3篇。

彭舜磊，博士后，2011年于华东师范大学生态与环境科学学院获生态学博士学位，2017年9月于中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室博士后出站。2018年7月入职信阳师范学院数学与统计学院工作至今。在国内外重要学术期刊Scientific Reports、Ecology and Evolution、Soil Research、Botanical studies、林业科学、生态学报等发表学术论文30余篇，其中SCI收录4篇。

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                                                                                                                                             数学与统计学院

                                                                                                                                             2018年10月6日