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Removal of arsenic from water by silver nanoparticles and Fe-Ce mixed oxide supported on polymeric anion exchanger

Journal of Environmental Sciences 2025年第5期151卷 540-549页

作者： Li Li Su-juan Yu Rong-gang Zheng Qing-cun Li Rui Liu Jing-fu Liu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances Institute of Environment and HealthJianghan UniversityWuhan 430056China University of Chinese Academy of Sciences Beijing 100049China Department of Ecology and Resources Engineering He Tao CollegeInner Mongolia 015000China

By encapsulating nanoscale particles of goethite(α-FeO(OH)),hydrous ceric oxide(CeO_(2)·H_(2)O,HCO)and silver nanoparticles(AgNPs)in the pores of polystyrene anion exchanger D201,a novel nanocomposite FeO(OH)-HCO-Ag-D201 was prepared for the effective removal of arsenic from *** isotherm study shows that FeO(OH)-HCO-Ag-D201 has excellent adsorption performance for As(III)and As(V),with an increased adsorption capacity of As(III)to 40.12 mg/g compared to that of 22.03 mg/g by the composite adsorbent without AgNPs(FeO(OH)-HCO-D201).The adsorption kinetics data showed that the sorption rate of FeO(OH)-HCO-Ag-D201 for As(III)is less than that for As(V),and the adsorption of As(III)and As(V)were consistent with the pseudo-second-order model and the pseudofirst-order model,*** or basic conditions are favored for the adsorption of As(III/V)by FeO(OH)-*** with nitrate/chloride/bicarbonate,sulfate/silicate/phosphate showed more remarkable inhibition of arsenic removal by FeO(OH)-HCO-Ag-D201,whereas natural organic matter showed no interference to the arsenic *** As(V)adsorption involved different interactions such as electrostatic attraction and surface complexation,while the adsorption of As(III)involved the part oxidization of As(III)to As(V)and the simultaneous adsorption of As(III)and As(V).In addition to the Ce(IV)in CeO_(2)·H_(2)O acted as an oxidant,the synergistic effect ofα-FeO(OH)and AgNPs also contributed to the oxidization of As(III)to As(V).Moreover,the reusable property suggested that this FeO(OH)-HCO-Ag-D201 nanocomposite has great potential for arsenic-contaminated water purification.

关键词： FeO(OH)-HCO-Ag-D201 Arsenic removal Synergistic effect Oxidation Electrostatic attraction Surface complexation

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优胜劣汰还是逆向选择——基于上市公司质量与股价表现关联的研究

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管理科学学报 2025年第2期28卷 154-170页

作者：靳馥境姜富伟唐国豪北京交通大学经济管理学院厦门大学宏观经济研究中心/经济学院/王亚南经济研究院湖南大学金融与统计学院湖南大学高性能分布式账本与数字金融教育部重点实验室

构建优胜劣汰的高质量资本市场是金融服务实体经济的关键.本文使用90多个财务特征指标等高维大数据和多种机器学习与计量方法提取基本面信息，对上市公司质量进行评价并构建基本面质量综合指数，研究基本面质量与股价表现的关联关系.研... 详细信息

构建优胜劣汰的高质量资本市场是金融服务实体经济的关键.本文使用90多个财务特征指标等高维大数据和多种机器学习与计量方法提取基本面信息，对上市公司质量进行评价并构建基本面质量综合指数，研究基本面质量与股价表现的关联关系.研究发现，上市公司基本面质量对股价表现具有显著为正的预测能力.其中，由偏最小二乘法构建的基本面质量指数对股票横截面收益的预测能力最强，年化收益近38%,且CAPM、三因子和五因子模型对此不能解释.本文还从行为金融和经济周期等视角探索公司基本面质量对股票价格的影响机制，发现市场情绪、有限套利、公司投资等决策和经济周期都有助于理解上市公司质量溢价现象.本文研究表明，我国股票市场定价效率已稳步提高，进入了“优胜劣汰”和价值投资阶段.

关键词：基本面质量股票收益文本情绪有限套利大数据与机器学习

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HchMER:混合人机智能的手写数学表达式识别方法

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软件学报 2025年第2期36卷 915-938页

作者：康文惠黄进仝青山付强田丰戴国忠人机交互北京市重点实验室(中国科学院软件研究所) 北京100190 中国科学院大学计算机科学与技术学院北京100049

随着人工智能和端到端识别方法在手写数学表达式识别上的应用,数学表达式识别准确率有了明显的提高.然而,与公开数据集上的测试不同,实际应用中人的参与为识别算法引入了更多的不确定因素,如个性化的笔画信息、包含歧义的手写字符,以及... 详细信息

随着人工智能和端到端识别方法在手写数学表达式识别上的应用,数学表达式识别准确率有了明显的提高.然而,与公开数据集上的测试不同,实际应用中人的参与为识别算法引入了更多的不确定因素,如个性化的笔画信息、包含歧义的手写字符,以及不确定的公式结构等,影响了识别算法的性能.为此,提出了一种混合人机智能的手写数学表达式识别方法HchMER.该方法借助手写数学公式识别算法、知识库和用户反馈,增强机器对用户输入的数学表达式的理解,从而提升手写数学表达式的编辑速度和准确率.为了验证HchMER的有效性,将其分别与MyScript Math Recognition(MyScript)算法,以及一个成熟的商用产品“Microsoft Ink Equation”(InkEquation)进行了比较.实验结果表明,HchMER在准确率上较MyScript和InkEquation分别提高了23.2%和26.51%.在平均完成时间上,HchMER比MyScript增加了44.46%(9.6 s),但是比InkEquation降低了11.48%(4.05 s).同时,被试在问卷调查和半结构化访谈中对HchMER给予了肯定.

关键词：人机混合智能草图理解在线手写数学表达式识别用户界面

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Joint Retrieval of PM_(2.5) Concentration and Aerosol Optical Depth over China Using Multi-Task Learning on FY-4A AGRI

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Advances in Atmospheric Sciences 2025年第1期42卷 94-110页

作者： Bo LI Disong fu Ling YANG Xuehua FAN Dazhi YANG Hongrong SHI Xiang’ao XIA Electronic Engineering College Chengdu University of Information TechnologyChengdu 610225China Tianjin Meteorological Radar Research Trial Center Tianjin Meteorological BureauTianjin 300074China Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Research Centre on Meteorological Observation Engineering Technology China Meteorological AdministrationBeijing 100081China Key Laboratory of Atmospheric Environment and Extreme Meteorology Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China University of Chinese Academy of Sciences Beijing 100049China

Aerosol optical depth(AOD)and fine particulate matter with a diameter of less than or equal to 2.5μm(PM_(2.5))play crucial roles in air quality,human health,and climate ***,the complex correlation of AOD–PM_(2.5)and the limitations of existing algorithms pose a significant challenge in realizing the accurate joint retrieval of these two parameters at the same *** this point,a multi-task learning(MTL)model,which enables the joint retrieval of PM_(2.5)concentration and AOD,is proposed and applied on the top-of-the-atmosphere reflectance data gathered by the Fengyun-4A Advanced Geosynchronous Radiation Imager(FY-4A AGRI),and compared to that of two single-task learning models—namely,Random Forest(RF)and Deep Neural Network(DNN).Specifically,MTL achieves a coefficient of determination(R^(2))of 0.88 and a root-mean-square error(RMSE)of 0.10 in AOD *** comparison to RF,the R^(2)increases by 0.04,the RMSE decreases by 0.02,and the percentage of retrieval results falling within the expected error range(Within-EE)rises by 5.55%.The R^(2)and RMSE of PM_(2.5)retrieval by MTL are 0.84 and 13.76μg m~(-3)*** with RF,the R^(2)increases by 0.06,the RMSE decreases by 4.55μg m~(-3),and the Within-EE increases by 7.28%.Additionally,compared to DNN,MTL shows an increase of 0.01 in R^(2)and a decrease of 0.02 in RMSE in AOD retrieval,with a corresponding increase of 2.89%in *** PM_(2.5)retrieval,MTL exhibits an increase of 0.05 in R^(2),a decrease of 1.76μg m~(-3)in RMSE,and an increase of 6.83%in *** evaluation suggests that MTL is able to provide simultaneously improved AOD and PM_(2.5)retrievals,demonstrating a significant advantage in efficiently capturing the spatial distribution of PM_(2.5)concentration and AOD.

关键词： AOD PM_(2.5) FY-4A multi-task learning joint retrieval

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“Sergeants-and-soldiers” effect and modified Ising model in chiral polymer materials

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Science China Chemistry 2025年

作者： Liyuan Shi fu Tian Sheng Wang Jiangsu Key Laboratory of Advanced functional Polymer Design and Application College of Chemistry Chemical Engineering and Materials Science Soochow University

The “sergeants-and-soldiers” effect is a significant feature of helical copolymers, where a small fraction of chiral components can endow the copolymers with an intense optical activity close to that of chiral homopolymer. With the development of helical polymers, some abnormal examples have also been discovered, in which the twisting sense of main chain can be inversed with the increment of chiral unit content, termed as abnormal “sergeants-and-soldiers” effect. In this review, we detailedly summarize the development of “sergeants-and-soldiers” effect and its theoretical model in chiral polymer systems, including normal and abnormal “sergeants-and-soldiers” effects, modification of Ising model, dynamic transformation of the above two chiral amplification effects, as well as their applications in chiral separation, asymmetric catalysis, and circularly polarized ***, the remaining challenges are discussed to provide an outlook on the future directions.

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母基金参股与风险投资机构退出表现

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证券市场导报 2025年第1期 65-79页

作者：付辉王中孔东民江南大学商学院江苏无锡214026 华中科技大学经济学院湖北武汉430074

本文选取2002—2021年中国风险投资市场的基金信息和投资事件,探讨私募股权母基金参股对风险投资机构退出表现的影响。研究发现:(1)母基金参股提高了风投机构成功退出的可能性;(2)对于民营风投机构以及风投和创业企业非同城的情况,母基... 详细信息

本文选取2002—2021年中国风险投资市场的基金信息和投资事件,探讨私募股权母基金参股对风险投资机构退出表现的影响。研究发现:(1)母基金参股提高了风投机构成功退出的可能性;(2)对于民营风投机构以及风投和创业企业非同城的情况,母基金能发挥更好的作用;(3)母基金具备筛选能力与加强能力,一方面倾向于选择参股知识多样化水平高和声誉水平高的风投机构,另一方面可以加强风投机构的增值效应,从而提升风投机构的退出表现;(4)在排除筛选能力的影响后,母基金依然可以提升风投机构的退出表现,进一步验证了母基金的加强能力。本文为私募股权母基金、风投机构退出表现研究提供了新的视角,为母基金管理、风投机构实践、监管部门政策引导提供了理论依据与经验参考。

关键词：私募股权母基金政府引导基金有限合伙人风险投资退出表现

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法舒地尔防治蛛网膜下腔出血并发脑血管痉挛临床疗效分析

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中国基层医药 2010年第24期17卷 3340-3341页

作者：施志杰钟国富李峰王梅杭州市余杭区第一人民医院急诊科浙江省杭州311100

目的探讨法舒地尔防治动脉瘤破裂蛛网膜下腔出血后脑血管痉挛的临床疗效.方法采用回顾性分析的方法,动脉瘤破裂蛛网膜下腔出血后脑血管痉挛患者临床资料,依据治疗方式不同分为观察组和对照组.结果观察组患者治疗后GCS评分明显优于对... 详细信息

目的探讨法舒地尔防治动脉瘤破裂蛛网膜下腔出血后脑血管痉挛的临床疗效.方法采用回顾性分析的方法,动脉瘤破裂蛛网膜下腔出血后脑血管痉挛患者临床资料,依据治疗方式不同分为观察组和对照组.结果观察组患者治疗后GCS评分明显优于对照组;观察组患者治疗后大脑中动脉平均血流速度明显低于对照组（P＜0.05）.观察组患者治疗后致残率、病死率均低于对照组（P＜0.05）.结论法舒地尔联合常规治疗动脉瘤破裂蛛网膜下腔出血后脑血管痉挛临床疗效明显,预后良好,值得临床推广应用.

关键词：法舒地尔动脉瘤破裂蛛网膜下腔出血脑血管痉挛

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Relationship between parenting stress and behavioral and emotional problems in preschool children: A mediation effect analysis

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World Journal of Psychiatry 2025年第1期15卷 128-136页

作者： Zhi-Wei fu Yue-Jing Li Ran Yu Rui-Qing guo Li-Xia Gao Sheng-Xia Zhao Department of Children's Health Shijiazhuang Maternity and Child Healthcare HospitalShijiazhuang 050000Hebei ProvinceChina

BACKGROUND Emotional reactions,such as anxiety,irritability,and aggressive behavior,have attracted clinical attention as behavioral and emotional problems in preschool-age *** To investigate the current status of family rearing,parental stress,and behavioral and emotional problems of preschool children and to analyze the mediating effect of the current status of family rearing on parental stress and behavioral/emo-tional *** We use convenience sampling to select 258 preschool children in the physical examination center of our hospital from October 2021 to September *** children and their parents were evaluated using a questionnaire ***'s correlation was used to analyze the correlation between child behavioral and emotional problems and parental stress and family rearing,and the structural equation model was constructed to test the mediating *** The score for behavioral/emotional problems of 258 preschool children was(27.54±3.63),the score for parental stress was(87.64±11.34),and the score for parental family rearing was(31.54±5.24).There was a positive correlation between the behavioral and emotional problems of the children and the“hostile/mandatory”parenting style;meanwhile,showed a negative correlation with the“support/participation”parenting style(all P<0.05).The intermediary effect value between the family upbringing of parents in parental stress and children's behavior problems was 29.89%.CONCLUSION Parental family upbringing has a mediating effect between parental stress and behavioral and emotional problems of *** paying attention to the behavioral and emotional problems of preschool-age children,clinical medical staff should provide correct and reasonable parenting advice to their parents to promote the mental health of preschool-age children.

关键词： Preschool children Parenting stress Children's behavioral and emotional problems Family rearing Mediating effect

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Biomaterial‑based mechanical regulation facilitates scarless wound healing with functional skin appendage regeneration

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Military Medical Research 2025年第1期12卷 96-120页

作者： Ying-Ying Li Shuai-Fei Ji Xiao-Bing fu Yu-Feng Jiang Xiao-Yan Sun Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Department Chinese PLA General Hospital and PLA Medical CollegePLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationResearch Unit of Trauma CareTissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing 100048China Research Unit of Trauma Care Tissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing 100048China 2Department of Tissue Regeneration and Wound RepairChinese PLA General HospitalBeijing 100853China

Scar formation resulting from burns or severe trauma can significantly compromise the structural integrity of skin and lead to permanent loss of skin appendages,ultimately impairing its normal physiological *** evidence underscores the potential of targeted modulation of mechanical cues to enhance skin regeneration,promoting scarless repair by influencing the extracellular microenvironment and driving the phenotypic *** field of skin repair and skin appendage regeneration has witnessed remarkable advancements in the utilization of biomaterials with distinct physical ***,a comprehensive understanding of the underlying mechanisms remains somewhat elusive,limiting the broader application of these *** this review,we present two promising biomaterial-based mechanical approaches aimed at bolstering the regenerative capacity of compromised *** first approach involves leveraging biomaterials with specific biophysical properties to create an optimal scarless environment that supports cellular activities essential for *** second approach centers on harnessing mechanical forces exerted by biomaterials to enhance cellular plasticity,facilitating efficient cellular reprogramming and,consequently,promoting the regeneration of skin *** summary,the manipulation of mechanical cues using biomaterial-based strategies holds significant promise as a supplementary approach for achieving scarless wound healing,coupled with the restoration of multiple skin appendage functions.

关键词： Scarless Wound healing Biomaterials Mechanical cues Skin appendages

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Construction of attapulgite-based one-dimensional nanonetwork composites with corrosion resistance for high-efficiency microwave absorption

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International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 689-698页

作者： Kai Xu Qingqing Gao Shaoqi Shi Pei Liu Yinxu Ni Zhilei Hao Gaojie Xu Yan fu Fenghua Liu School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang Key Laboratory of Additive Manufacturing Materials Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Northwest Yongxin Coatings Limited Company Lanzhou 730046China

Exploring high-efficiency and broadband microwave absorption(MA)materials with corrosion resistance and low cost is ur-gently needed for wide practical ***,the natural porous attapulgite(ATP)nanorods embedded with TiO_(2)and polyaniline(PANI)nanoparticles are synthesized via heterogeneous precipitation and in-situ *** obtained PANI-TiO_(2)-ATP one-di-mensional(1D)nanostructures can intertwine into three-dimensional(3D)conductive network,which favors energy *** min-imum reflection loss(RL_(min))of the PANI-TiO_(2)-ATP coating(20wt%)reaches-49.36 dB at 9.53 GHz,and the effective absorption band-width(EAB)can reach 6.53 GHz with a thickness of 2.1 *** excellent MA properties are attributed to interfacial polarization,mul-tiple loss mechanisms,and good impedance matching induced by the synergistic effect of PANI-TiO_(2)nanoparticle shells and ATP *** addition,salt spray and Tafel polarization curve tests reveal that the PANI-TiO_(2)-ATP coating shows outstanding corrosion resist-ance *** study provides a low-cost and high-efficiency strategy for constructing 1D nanonetwork composites for MA and corrosion resistance applications using natural porous ATP nanorods as carriers.

关键词： microwave absorption corrosion resistance attapulgite TiO_(2) polyaniline

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