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Design of a cationic accelerator enabling ultrafast ion diffusion kinetics in aqueous zinc-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 377-384页

作者： Yawei xiao Qianqian gu Haoyu Li Mengyao Li yude Wang National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources School of Chemistry and Chemical Engineering Hainan University College of Chemical Engineering Fuzhou University yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies Yunnan University

Aqueous zinc-ion batteries are highly favored for grid-level energy storage owing to their low cost and high safety,but their practical application is limited by slow ion *** address this,a strategy has been developed to create a cation-accelerating electric field on the surface of the cathode to achieve ultrafast Zn2+diffusion *** employing electrodeposition to coat MoS2on the surface of BaV6O16·3H2O nanowires,the directional built-in electric field generated at the heterointerface acts as a cation accelerator,continuously accelerating Zn2+diffusion into the active *** optimized Zn2+diffusion coefficient in CC@BaV-6O16·3H2O@MoS2(7.5×10～8cm2s-1) surpasses that of most reported V-based ***,MoS2serving as a cathodic armor extends the cycling life of the Zn-CC@BaV6O16·3H2O@MoS2full batteries to over 10000 *** work provides valuable insights into optimizing ion diffusion kinetics for high-performance energy storage devices.

关键词： Zinc alloys

Fluorinated poly(p-triphenylene isatin) anion exchange membranes based on hydrophilic hydroxyl side chain modulation for fuel cells

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Journal of Energy Chemistry 2025年第1期100卷 702-709页

作者： Yiman gu Yanchao Zhang Zhanyu Li Yijia Lei Baozeng Sun xiaoyu yu Zhe Wang College of Chemistry and Life Science Changchun University of Technology College of Chemical Engineering Changchun University of Technology School of Materials Science and Engineering Changchun University of Technology Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province

The development of alkaline fuel cells is moving forward at an accelerated pace,and the application of ether-free bonded polymers to anion exchange membranes （AEMs） has been widely ***,the question of the“trade-off”between AEM ionic conductivity and dimensional stability remains *** strategy of inducing microphase separation to improve the performance of AEM has attracted much attention recently,but the design of optimal molecular structures is still being ***,this work introduced different ratios of 3-bromo-1,1,1-trifluoroacetone （x=40,50,and 60） into the main chain of poly（p-terphenylene isatin）.Because fluorinated groups have excellent hydrophobicity,hydrophilic hydroxyl-containing side chains are introduced to jointly adjust the formation of phase separation *** results show that PTI-PTF50-NOH AEM with the appropriate fluorinated group ratio has the best ionic conductivity and alkali stability under the combined effect of *** has an ionic conductivity of 133.83 mS cm-1at 80°*** addition,the OH-conductivity remains at 89%of the initial value at 80°C and 3 M KOH for 1056 h of *** cell polarization curve based on PTI-PTF50-NOH shows a power density of 734.76 mW cm-2at a current density of 1807.7 mA cm-2.

关键词： Potassium hydroxide

车险定价中风险因子重要性测度的比较研究——基于集成学习方法和广义线性回归模型

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保险研究 2019年第10期 73-83页

作者：张碧怡肖宇谷曾宇哲中国人民大学统计学院中国人民大学统计学院风险管理与精算教研室

车险业务中影响车险损失的风险因子很多,如从人因子、从车因子、从属地因子和保单属性因子等,保险公司通常利用这些风险因子对个体风险进行分类,一方面作为车险定价的依据,另一方面也为部门沟通、业务选择和市场细分提供支持。因此,识... 详细信息

车险业务中影响车险损失的风险因子很多,如从人因子、从车因子、从属地因子和保单属性因子等,保险公司通常利用这些风险因子对个体风险进行分类,一方面作为车险定价的依据,另一方面也为部门沟通、业务选择和市场细分提供支持。因此,识别风险因子的重要性对提升整个车险业务质量有非常重要的意义。近年来机器学习算法在车险损失预测中的应用越来越多,但目前的研究主要考虑了损失预测的精度,对风险因子的重要性测度缺少系统深入的研究。为此,本文对8个车险数据集,利用两种集成学习方法(随机森林和XGBoost),比较了它们与广义线性回归模型在索赔频率风险因子重要性测度上的一致性。研究结果表明,这两种集成学习方法不仅能提高预测精度,还能提供较一致的风险因子重要性测度。

关键词：汽车保险机器学习变量重要性随机森林 XGBoost

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带免赔的奖惩系统的最优索赔策略

运筹与管理 2009年第3期18卷 111-115页

作者：肖宇谷孟生旺中国人民大学应用统计科学研究中心北京100872

在汽车保险的奖惩系统中加入免赔额,将有利于保证风险与保费的匹配,还可以减少小额损失带来的大量管理费用。本文应用马尔科夫最优化原理推广了汽车保险的最优索赔策略模型。根据我国现行的机动车辆保险条款,得到了加入免赔额时的最优... 详细信息

在汽车保险的奖惩系统中加入免赔额,将有利于保证风险与保费的匹配,还可以减少小额损失带来的大量管理费用。本文应用马尔科夫最优化原理推广了汽车保险的最优索赔策略模型。根据我国现行的机动车辆保险条款,得到了加入免赔额时的最优索赔策略。

关键词：汽车保险奖惩系统马尔科夫决策过程免赔额最优自留额

我国农业保险大灾风险的空间分散效应测度与应用研究

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保险研究 2022年第7期 58-68页

作者：肖宇谷杨晓波齐纪元中国人民大学应用统计科学研究中心国家开发银行河南省分行中国人民大学统计学院

大灾风险空间分散效应的测度是评估农业保险系统性风险的理论基础,也是优化农险公司经营策略和承保能力的理论依据。本文利用我国粮食主产区的农作物灾情数据,测度了农业保险经营中空间尺度增加对大灾风险所产生的空间分散效应,并研究... 详细信息

大灾风险空间分散效应的测度是评估农业保险系统性风险的理论基础,也是优化农险公司经营策略和承保能力的理论依据。本文利用我国粮食主产区的农作物灾情数据,测度了农业保险经营中空间尺度增加对大灾风险所产生的空间分散效应,并研究了不同保险合约要素对该效应的影响。研究结果显示,随着空间尺度的增加,农业大灾风险存在相对较高的空间分散效应,即在十三个粮食主产省开展业务比只在单一省份经营在平均意义上能减少三分之一的经济资本。另外,不同的保险产品和不同的保障水平对经济资本规模有很大影响,高保额的成本保险经济资本要求偏高,这意味着我国完全成本保险在对主产省产粮大县全覆盖的同时,需要重视其风险的快速聚集。

关键词：农业保险系统风险空间分散效应保险合约要素

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： xiao Xiang Feng Gao yu-gui Peng Peng Wu Zong-Lin Li Xue-Feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

Combination of fruquintinib with venetoclax for the treatment of colorectal cancer

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Oncology research 2025年第1期33卷 225-234页

作者： Wei Zhang Weicheng Wang Rui Wang xiao Han Lijun Zhu Wenjie guo Yanhong gu Department of Oncology The First Affiliated Hospital of Nanjing Medical University Nanjing 210029 China. Department of Oncology The Affiliated Taizhou People's Hospital of Nanjing Medical University Taizhou 225300 China. State Key Laboratory of Pharmaceutical Biotechnology School of Life Sciences Nanjing University Nanjing 210023 China.

Background:As a novel blocker of vascular endothelial growth factor receptor (VEGFR), fruquintinib has been approved for treating colorectal cancer (CRC). However, its dosage and therapeutic efficacy are limited by its widespread adverse reactions. Venetoclax, recognized as the initial inhibitor of B-cell lymphoma protein 2 (BCL2), has shown potential in boosting the effectiveness of immunotherapy against CRC. This study investigated the efficacy and mechanisms of fruquintinib combined with venetoclax in treating CRC.Methods and Materials:We developed a colon cancer mouse model with the CT26 colon cell line to demonstrate fruquintinib and venetoclax's efficacy against tumors. Then we employed various techniques to evaluate different aspects of the experimental outcomes. Immunohistochemistry was used to detect cell proliferation and angiogenesis in tumor tissues. Western blot analysis was utilized to examine the occurrence of cell apoptosis, and flow cytometry to quantitate immune cells within the tumor tissues. Moreover, immunofluorescence was employed to measure cytokine levels.Results:The strongest inhibition on tumor growth was achieved by the combination of fruquintinib with venetoclax, as opposed to individual drug use. Venetoclax was found to amplify the impact of fruquintinib, leading to decreased cancer cell proliferation, increased cancer cell apoptosis, lowered angiogenesis, better vascular structure normalization, and improved immune cell infiltration.Conclusion:Our findings indicate that the addition of venetoclax enhances the impact of fruquintinib on vascular normalization and modulation of the tumor immune microenvironment. Our study presents the justification for utilizing the fruquintinib and venetoclax combination in treating CRC. Venetoclax holds promise in being assimilated into anticancer medications for CRC.

关键词： Anti-angiogenesis B-cell lymphoma protein 2 (BCL2) Colorectal cancer (CRC) Fruquintinib Immunotherapy Vascular endothelial growth factor receptor (VEGFR) Venetoclax

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我国保险监管法规使用特征分析及效率评价

保险研究 2019年第3期 17-26页

作者：肖宇谷张俊岩于嘉傲中国人民大学统计学院风险管理与精算教研室中国人民大学财政金融学院美国哥伦比亚大学统计系

尽管我国在保险行业监管方面投入巨大,但随着市场竞争加剧,保险行业中各类违法行为仍时有发生,屡禁不止。为了更好的了解我国保险监管一些基本特征,了解保险监管的处罚效率,本文对2011～2017年我国公开的保险监管行政处罚决定书做了文... 详细信息

尽管我国在保险行业监管方面投入巨大,但随着市场竞争加剧,保险行业中各类违法行为仍时有发生,屡禁不止。为了更好的了解我国保险监管一些基本特征,了解保险监管的处罚效率,本文对2011～2017年我国公开的保险监管行政处罚决定书做了文本统计分析,给出了保险监管法规使用的一些基本情况。然后,本文又以查处及时性和重复违规率两个指标为基础,分析了保险监管对不同类型违法行为的监管效率。结果显示,违规行为涉及的具体法条有较大的不均衡性,查处及时性存在较为显著的时滞效应,行政处罚的重复违规率呈现下降趋势,监管效果在逐年改善,但虚列费用套取资金、提供虚假报告和虚构中介业务套取费用等问题依然严重,给予投保人回扣等变相价格竞争行为大幅增加。这些结果为提高我国保险监管效率提供了有意义的依据和参考。

关键词：保险监管监管效率法规使用特征

Experimental Observing Damage Evolution in Cement Pastes Exposed to External Sulfate Attack by in situ X-ray Computed Tomography

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 164-170页

作者： WU Min CAO Kailei xiao Weirong yu Zetai CAO Jierong DING Qingjun LI Jinhui China Railway Construction Corporation Harbour and Channel Engineering Bureau Group Co. LTDZhuhai 519000China Con-struction Headquarters of Zhoushan Liuheng Bridge Phase II Project Zhoushan 316000China China Railway Construction Bridge En-gineering Bureau Group Co. LTDTianjin 300000China State Key Laboratory of Silicate Material for Architecture(Wuhan University of Technology) Wuhan 430070China College of Materials Science and Engineering Wuhan Textile UniversityWuhan 430200China

The paper presents experimental investigation results of crack pattern change in cement pastes caused by external sulfate attack(ESA).To visualize the formation and development of cracks in cement pastes under ESA,an X-ray computed tomography(X-ray CT)was used,i e,the tomography system of Zeiss Xradia 510 *** results indicate that X-CT can monitor the development process and distribution characteristics of the internal cracks of cement pastes under ESA with attack *** addition,the C3A content in the cement significantly affects the damage mode of cement paste specimens during sulfate *** damage of ordinary Portland cement(OPC)pastes subjected to sulfate attack with high C3A content are severe,while the damage of sulfate resistant Portland cement(SRPC)pastes is much smaller than that of OPC ***,a quadratic function describes the correlation between the crack volume fraction and development depth for two cement pastes immermed in sulfate solution.

关键词： concrete external sulfate attack damage evolution situ X-ray computed tomography