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13
2026/06
Exponential Sums of Dickson Polynomials over Finite Fields
We study the exponential sums of Dickson polynomials of the first kind over finite fields. We provide an explicit expression for these sums by utilizing a decomposition of these polynomial sums, character orthogonality, and an elementary norm identity to cancel out trivial characters. We then apply Weil-type Kloosterman estimates for the remaining non-trivial character sums to obtain a bound, which is sharper than the Weil bound in all possible cases. This is joint work with Daqing Wan.
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13
2026/06
Tunnell's formula and a generalization
Tunnell's formula states that the quadratic n-twisted L-value of the congruent number elliptic curve is proportioanl to the square of the n-th Fourier coefficient of a weight 3/2 modular form, and it has striking applications to the classical congruent number problem. In this talk, I will first review Tunnell's formula and explain how it connects with Waldspurger's fundamental results on Fourier coefficients of half integral weight modular forms, then discuss a generalization (joint with Wei He and Ye Tian).
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18
2026/06
The Drunken Monkey: Is Alcohol Consumption by Modern Humans An Evolutionary Hangover?
Ethanol derives from the fermentation of simple sugars, and fermentative yeasts are ubiquitous within terrestrial ecosystems. Animals that consume sugar-rich fruits and nectar thus routinely ingest low-level ethanol; the positive psychoactive responses to ethanol among vertebrate fruit-eaters (and modern humans) act to increase net caloric gain during feeding via the aperitif effect. Early primates (and more recently the great apes) predominantly consumed ripe fruit, suggesting chronic exposure to fermented carbohydrates along with natural selection for the rapid localization and consumption of these calorically rich substrates. Patterns of alcohol use by modern humans may thus reflect ancestral sensory biases associating ethanol consumption with nutritional reward (i.e., the "drunken monkey" hypothesis).
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13
2026/06
2026年理论与计算化学交叉前沿论坛暨周末专家河北行活动
主办单位：河北省化学会、河北师范大学、石家庄市科学技术协会承办单位：河北师范大学化学与材料科学学院、石家庄市化学学会会议通过邀请报告形式，围绕电子结构理论、化学动力学、非共价相互作用、生物体系与材料等领域的前沿研究展开讨论。2026年6月13日上午（1）8:10-8:30 开幕式、合影（2）8:30-9:10 Rare-Earth and Actinide Theoretical Chemistry: Progress and Perspectives李隽院士 清华大学（3）9:10-9:50 气相分子化学键周鸣飞教授 复旦大学（4）10:00-10:40 熵刘亚军教授 北京师范大学（5）10:40-11:20 星际分子PN的化学演化曾小庆教授 复旦大学（6）11:20-11:50 卤键/硫键在有机催化中的应用曾艳丽教授 河北师范大学
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11
2026/06
Power Semigroups and Two Rigidity Theorems for Groups
Let $\mathcal P(H)$ be the semigroup obtained by endowing the family of all non-empty subsets of a semigroup $H$ with the setwise operation naturally induced by $H$ on its power set, and denote by $\mathcal P_\text{fin}(H)$ the subsemigroup of $\mathcal P(H)$ consisting of all non-empty finite subsets of $H$.We prove that if $H$ is a group and $K$ is a semigroup, then $\mathcal P(H) \cong \mathcal P(K)$ implies $H \cong K$. The finitary analogue of the same statement appears to be considerably more difficult, and we establish it only when $H$ is an additive subgroup of the rationals. The proof of this second result relies, in a circuitous way, on a special case of the Evertse-Schlickewei-Schmidt theorem.The talk is based on joint work with Shuolin Liu (a 2nd-year undergraduate student at the School of Mathematical Sciences of Hebei Normal University).
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02
2026/07
周末专家河北行—启心讲坛：加拿大留学生的自我重要性认知和归属感 对心理健康的影响
探讨在加拿大留学的国际大学生疫情下所面临的挑战，重点分析归属感和自我重要性认知在国外求学过程中的保护作用，以及自我非重要性认知通过加剧文化适应压力、孤独感和歧视，从而对心理健康造成破坏性影响。
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16
2026/06
谈中国声乐作品的审美与艺术表现
本次讲座以“中国声乐作品的审美特质与艺术表现路径”为核心，立足中国传统文化根基与声乐艺术的当代发展，系统梳理中国声乐作品在审美追求、情感表达、文化内涵上的独特性，探讨如何通过演唱技巧、情感诠释与文化理解，实现“声”“情”“境”的统一，展现中国声乐的民族精神与艺术魅力。
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18
2026/06
以舞为笔、抒大地情怀--以山东民间舞蹈创作为例
本次讲座以“以舞为笔、抒大地情怀”为核心，聚焦山东民间舞蹈的创作实践，探讨如何通过舞蹈语言提炼地域文化基因，表达对土地、人民与传统的深层情感。山东民间舞蹈作为黄河文化与齐鲁文明的重要载体，其创作不仅是艺术形式的呈现，更是对“大地情怀”的诗意诠释——即对地域历史的追溯、对民俗生活的观照、对精神信仰的传承。
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11
2026/06
大型数据库的研究使用与分析方法
讲座围绕大型公开微观数据的使用展开，详细介绍了大型微观数据的获取方式与使用规范、常见大型微观数据库的基本情况与特点，并结合具体数据库讲解如何阅读调查问卷、理解变量设置与数据结构。同时，还将结合Stata软件，介绍微观数据的清洗、合并、变量构建及基础实证分析方法。
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09
2026/06
深学细悟习近平总书记关于自我革命的重要思想
党的自我革命重要思想聚焦“为什么要自我革命、为什么能自我革命、怎样推进自我革命”三大问题，提出“九个以”实践要求，是新时代全面从严治党经验的总结升华，构成习近平关于党的建设重要思想的核心部分，提出了跳出“历史周期率”在“窑洞对”之后的第二个答案。
