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学术报告：Advancements in weighted incidence matrix labelling methods for graph spectral theory
2025-11-04
报告人：单海英教授报告时间：2025年11月6日下午15:00腾讯会议号：130-486-843 报告摘要：This report explores the development and applications of the α-normal labelling method and its extension, the （α，β）-labelling method, in k-uniform hypergraphs and graphs. Initially proposed by Linyuan Lu and Shoudong Man in 2016, this method has significantly advanced the study of spectral properties in hyper...
学术报告：量子电池容量等相关研究
2025-11-04
报告人：张廷桂副教授报告时间：2025-11-07下午15:00-16:00腾讯会议：780-987-667报告摘要：量子电池是近年来量子信息中的一个新兴研究方向，我们首先介绍围绕电池容量提升做的一些工作。量子贝尔非局域性是量子信息的基础理论，相关证实已经获得2022年诺奖，本报告介绍量子态的非局域性在霍金辐射下的变化。最后我们介绍一点量子纹理的量化知识。报告人简介：张廷桂，海南师范大学副教授、博导。主持国家自然科学青年、地区、天元...
学术报告：An IM-based method for testing homogeneity of several variances against tree ordered alternative
2025-10-31
报告人：卢河志博士后报告时间：2025年11月1日下午4:00腾讯会议号：193-366-665报告摘要：Comparing several normal variances with a control group is very important in many fields. This paper proposes a new inferential model-based test for the homogeneity of several variances against tree-ordered alternatives.  报告人简介：卢河志，博士，统计学博士后，现任职于广州大学经济与统计学院。2020年6月博士毕业...
学术报告：A semi-parametric factor-GARCH model for high dimensional covariance matrix estimation
2025-10-31
报告人：张兴发副教授报告时间：2025年11月1日下午2:00腾讯会议号：193-366-665报告摘要：Establish a semi-parametric factor-GARCH model to estimate covariance matrix within a high-dimensional framework where both factors and factor loadings are unobservable and the data shows heteroskedasticity. Use projection technique to remove noise components, leading to a more precise estimation of the covariance ...
学术报告：Asymptotic properties of Kaplan–Meier estimator and hazard estimator for censored survival time with LENQD data
2025-10-31
报告人：李乃医教授报告时间：2025年11月1日上午9:00腾讯会议号：795-739-136报告摘要：Consider the estimators of distribution function and hazard rate for censored survival time. Some properties and inequalities are established for linearly extended negative quadrant-dependent sequence as auxiliary results. Investigate the strong consistency and strong representation for the Kaplan–Meier estimator and...
学术报告：Instability analysis and regularization approximation to the forward/backward problems for fractional damped wave equations with random noise equations with random noise
2025-10-29
报告人：宋泽芳副教授报告时间：2025年10月30日上午10:00腾讯会议号：651-761-652报告摘要：Considered herein is the forward/backward problems for fractional damped wave equations  subject to the random Gaussian white noise initial and final data. Construct the mild solutions to forward/backward problems under all cases for parameters, and then investigate their stability and instability properties...
学术报告：Empirical likelihood for probability density functions under strong mixing high-frequency data
2025-10-29
报告人：李英华教授报告时间：2025年10月30日上午8：00腾讯会议号：651-761-652报告摘要：Construct the empirical likelihood ratio statistic for a probability density function with strong mixing high-frequency data, and show that the empirical likelihood ratio statistic is asymptotically Chi Square-type distributed, which is used to obtain an empirical likelihood based confidence interval for ...
学术报告：Anti-Ramsey number of intersecting cliques
2025-10-27
报告人：鲁红亮教授报告时间：2025年10月30日下午15:00腾讯会议号：545-333-670 报告摘要：An edge-colored graph is calledrainbow graphif all the colors on its edges are distinct. Given a positive integer nand a graph G, the anti-Ramsey number ar(n,G) is defined to be the minimum number of colors rsuch that there exists a rainbow copy of Gin any exactly r-edge-coloring of K_n. Let F_{k,r} denote the gra...
学术报告：Ramsey numbers of books versus cycles
2025-10-27
报告人：彭兴教授报告时间：2025年10月28日上午9:30腾讯会议号：747-684-239报告摘要：Given positive integers n and k, a k-book with npages is a graph which consists of ncopies of cliques with k+1vertices sharing a common k-clique. In this talk, I will survey our recent results on Ramsey numbers of books and cycles.报告人简介：彭兴，安徽大学数学科学学院教授，博士生导师，主要研究方向为极值图论和随机图论...
学术报告：Trainability and Generalization in Quantum Neural Networks
2025-09-28
报告人：朱成鸿报告时间：2025年10月7日16：00-16：40报告地点：数学与信息学院715报告摘要：Quantum neural networks (QNNs) promise near-term quantum advantage, yet they face connected obstacles in learning, trainability, and generalization. We show that, even with high-quality initial states, QNNs almost surely fall into unfavorable local minima once the loss dips below a critical value; the escape pro...
学术报告： Symmetric quantum joint measurements on multiple qubits
2025-09-25
报告人：闫凤利教授报告时间：2025年10月3日上午10：50-11：30报告地点：数学与信息学院报告厅201报告摘要：We investigate the generalization of symmetric quantum joint measurements on multiple qubits. We first describe a method for constructing a symmetric joint measurement basis for three qubits by utilizing single-qubit states corresponding to the four vertices of an isohedral tetrahedron on the Bloch...
学术报告：Entanglement hierarchies in multipartite scenarios
2025-09-25
报告人：高亭教授报告时间：2025年10月3日上午10：00-10：40报告地点：数学与信息学院报告厅201报告摘要：We investigate the hierarchical structure of the n-partite quantum states. We present several types of parameterized multipartite entanglement measures. Rigorous proofs show that the proposed k-nonseparable measures satisfy all the requirements for being an entanglement measure including the entangle...
我院将举办中国计算机学会计算机视觉专委会走进高校系列报告会
2025-09-25
学术报告：Ground States of Mass Subcritical Fermi Systems with Attractive Interactions
2025-09-22
报告人：郭玉劲教授报告时间：2025年9月23日上午10:00-12:30报告地点：腾讯会议405 944 777报告摘要：It is well known that almost all elementary quantum many-body particles in nature are divided fundamentally into two classes, i.e., bosons and fermions, in terms of the spin quantum numbers. Ground states of quantum bosons were investigated widely over the past few decades. In this talk we focus on groun...
学术报告：Positive solutions for critical p-Laplacian equation with critical Neumann boundary condition
2025-09-15
学术报告：Ground state for a logarithmic Schrodinger-Poisson system
2025-09-08
报告人：王征平 教授报告时间：2025年9月10日上午9：30-12:30报告地点：腾讯会议188-706-920报告摘要：In this talk, we give some recent results on the three dimensional logarithmic Schrodinger-Poisson system with coercive potential. Under some technical conditions on the potential, by using variational methods we investigate the existence, asymptotic behavior and radial symmetry of ground state. 报...
学术报告：Bifurcations at infinity in general 3D piecewise-smooth quadratic vector fields
2025-07-10
报告人：刘永建教授报告时间：2025年7月15日上午10:00-11:00报告地点：数学与信息学院数学系715室报告摘要：Research on bifurcations at infinity in three-dimensional piecewise-smooth nonlinear vector fields remains scarce in the existing literature. This paper aims to bridge this gap by investigating bifurcations at infinity in general 3D piecewise-smooth quadratic vector fields. We derive the expression...
学术报告：随机激励下非光滑系统全局动力学Melnikov方法研究
2025-07-10
报告人：魏周超  教授报告时间：2025年7月15日上午11:00-12:00，数学系715室报告地点：数学与信息学院数学系715室报告摘要：将经典同宿与异宿Melnikov方法分别推广到了三类具有脉冲效应和噪声激励的混合分段光滑系统中，发展了相应全局分岔与混沌动力学的随机非光滑Melnikov理论，探究了其混沌产生准则与机理，并应用于船舶横摇、混沌倾覆与抑制等相关问题。报告人简介：魏周超，中国地质大学(武汉)数学与物理学院教授，博士...
Stab-GKnock: controlled variable selection for partially linear models using generalized knockoffs
2025-06-25
报告人:李高荣报告时间：2025年6月30日下午15:00报告地点：数学与信息学院201报告厅报告摘要:The recently proposed fixed-X knockoff is a powerful variable selection procedure that controls the false discovery rate (FDR) in any finite-sample setting, yet its theoretical insights are difficult to show beyond Gaussian linear models. In this paper, we make the first attempt to extend the fixed-X knockoff to...
学术报告：Hypothesis Testing in Varying Coefficient Models Based on the Multiplier Bootstrap
2025-06-16
报告人：宋晓军报告时间：2025年6月26日（周四）上午10:00报告地点：数学与信息学院201报告厅报告摘要:Varying coefficient models provide a robust and practical framework while balancing flexibility and simplicity. This study discusses a series of hypothesis testing problems in varying coefficient models, including a constancy test, a significance test, and a partial constancy test. The null hypotheses a...