学术报告
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20
2020-10
格密码的后门攻击-潘彦斌 副研究员(中国科学院数学与系统科学研究院)编码密码学术活动月系列活动五 题目:格密码的后门攻击 报告人:潘彦斌 副研究员 (中国科学院数学与系统科学研究院) Abstract: Kleptography was introduced by Young and Yung which is about using an embedded backdoor to perform attacks on a cryptosystems. In this talk, we present a universal method to ...
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20
2020-10
布尔函数的敏感度综述-吴保峰 副研究员(中国科学院信息工程研究所)编码密码学术活动月系列活动五 题目:布尔函数的敏感度综述 报告人:吴保峰 副研究员(中国科学院信息工程研究所) 摘要: 理论计算机科学的一个重要研究领域是布尔函数的计算复杂性理论,其研究往往综合运用线性代数、调和分析、概率论、图论等多种数学工具。敏感度、分块敏感度、决策树复杂度、certificate复杂度、代数次数是度量布尔函数计算复杂性的几个基本指标,计算复杂性理论的一个核心问题是研究这些指标的关系,其中一个近30年的猜想是:敏感度与其它几个复杂性指标都是多项式相关的,这称为布...
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20
2020-10
Refined Analysis to the Extended Tower Number Field Sieve-庄金成 教授(山东大学 网络空间安全学院)编码密码学术活动月系列活动五 题目:Refined Analysis to the Extended Tower Number Field Sieve 报告人:庄金成 教授(山东大学 网络空间安全学院) Abstract: The hardness of discrete logarithm problem over finite fields is the security foundation of many cryptographic protocols. When the ...
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16
2020-10
Constructions of maximally recoverable local reconstruction codes——金玲飞 副教授(复旦大学)编码密码学术活动月系列活动四 题目:Constructions of maximally recoverable local reconstruction codes 报告人:金玲飞 副教授(复旦大学) Abstract: Local Reconstruction Codes (LRCs) allow for recovery from a small number of erasures in a local manner based on just a few other c...
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16
2020-10
Optimal locally repairable codes via automorphism groups of elliptic curves——马立明副研究员(中国科学技术大学)编码密码学术活动月系列活动四 题目:Optimal locally repairable codes via automorphism groups of elliptic curves 报告人:马立明 副研究员(中国科学技术大学) Abstract: Locally repairable codes, or locally recoverable codes (LRC for short) are designed for application in distribute...
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15
2020-10
Multi-Kink Quantile Regression for Longitudinal Data with Application to Progesterone Data Analysis——钟威(厦门大学)题目:Multi-Kink Quantile Regression for Longitudinal Data with Application to Progesterone Data Analysis 报告人:钟威 教授(厦门大学) Abstract:Motivated by investigating the relationship between progesterone and the days in a menstrual cycle in a longitudinal stu...
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15
2020-10
Large-Scale Datastreams Surveillance via Pattern-Oriented-Sampling——邹长亮(南开大学)题目:Large-Scale Datastreams Surveillance via Pattern-Oriented-Sampling 报告人:邹长亮 教授(南开大学) Abstract: Monitoring large-scale datastreams with limited resources has become increasingly important for real-time detection of abnormal activities in ma...
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15
2020-10
2020 年《变分法小型讨论会》(十八)- 孙明正副教授 北方工业大学2020 年《变分法小型讨论会》(十八) Miniworkshop on Variational Methods-18 报告人:孙明正副教授,北方工业大学 报告题目:Multiple solutions for Kirchhoff type equations via Morse theory and minimax methods, (II) 时间:2020 年10 月15 日,9:00-11:00 地点:腾讯会议在线 联系人:苏加宝,田如顺 (获取会议号请联系rushun.tian@cnu....
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12
2020-10
Explicit Constructions of Optimal-Access MSCR Codes for All Parameters-张志芳 研究员 (中国科学院数学与系统科学研究所)编码密码学术活动月系列活动三 题目:Explicit Constructions of Optimal-Access MSCR Codes for All Parameters 报告人:张志芳 研究员 (中国科学院数学与系统科学研究所) Abstract: The MSCR (minimum storage cooperative regenerating) code is an important variation of regenerating codes for repair...
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09
2020-10
Gaussian curvature flow on $S^2$ for sign-changing curvature candidates-陈学长教授 (南京大学)题目:Gaussian curvature flow on $S^2$ for sign-changing curvature candidates 报告人:陈学长,教授,南京大学 摘要:We introduce a Gaussian curvature flow to study the Nirenberg problem. This flow with a different normalization from the original one by Struwe, seems mor...