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基于广义线性混合效应模型的森林树木死亡研究

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生态学报 2024年第6期44卷 2420-2436页

作者：闫明陈艳梅闫静奚为民山西师范大学生命科学学院太原030031 山西师范大学现代文理学院临汾041000 Department of Biological and Health Sciences Texas A&M University-KingsvilleKingsvilleTX 78363USA

基于计数模型方法,同时考虑样地的随机效应,构建林分水平死亡模型,探究影响树木死亡的因素,以期为森林资源的监测与管理提供参考依据。以美国德州东部森林连续清查的样地数据为数据源,按4∶1的比例将其进行随机抽样,划分为训练集和验证... 详细信息

基于计数模型方法,同时考虑样地的随机效应,构建林分水平死亡模型,探究影响树木死亡的因素,以期为森林资源的监测与管理提供参考依据。以美国德州东部森林连续清查的样地数据为数据源,按4∶1的比例将其进行随机抽样,划分为训练集和验证集数据,将立地因子、林分因子和气候因子作为模型的自变量,林木死亡株数则作为模型的因变量,运用计数模型和混合效应模型方法进行模型的构建,并分析影响林木死亡株数的因子。使用赤池信息准则(AIC)、贝叶斯信息准则(BIC)和-2倍对数似然函数值(-2logL)3种模型评价指标评估各模型间的拟合效果;采用平均绝对误差(MAE)和均方根误差(RMSE)2种评价指标评估其预测效果,以便筛选出最佳的林分水平死亡模型。结果表明:立地因子方面,林木死亡株数与海拔(P<0.01)呈显著的负效应,与坡度(P<0.05)呈显著的正效应,说明林木死亡株数随海拔的升高而减少,随坡度的增加而增多;林分因子方面,林木死亡株数与林分年龄(P<0.001)和树木基面积(P<0.001)呈显著的正效应,与林分平方平均胸径(P<0.001)和林分密度(P<0.05)呈显著的负效应,说明林木死亡株数随林分年龄的增加和树木基面积的增大而增加,随林分平方平均胸径和林分密度的增大而减少;气候因子方面,林木死亡株数与SPEI(P<0.05)、干旱长度(P<0.001)、年平均温度(P<0.001)和夏季平均降雨量(P<0.05)均呈显著的负效应,与夏季平均温度(P<0.001)呈显著的正效应,说明林木死亡株数随干旱强度和夏季平均温度的增加而增多,随干旱长度、年平均温度和夏季平均降雨量的增加而减少。在基础计数模型中,零膨胀负二项(ZINB)模型的拟合效果最好。而加入样地随机效应后,混合效应模型的拟合精度明显有所提高。基于所有模型模拟结果的比较,得出德州东部森林的林分水平死亡模型以ZINB-mixed模型为最优模型。

关键词：树木死亡计数模型混合效应模型影响因子

Serotonin receptor 2B induces visceral hyperalgesia in rat model and patients with diarrhea-predominant irritable bowel syndrome

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World Journal of Gastroenterology 2024年第10期30卷 1431-1449页

作者： Zheng-yang Li Yu-Qing Mao Qian Hua Yong-Hong Sun Hai-yan Wang Xuan-Guang Ye Jing-Xian Hu Ya-Jie Wang Miao Jiang Department of Gastroenterology Jinshan Hospital of Fudan UniversityShanghai 201508China Department of Gastroenterology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China Department of Gastroenterology Dalian Friendship HospitalDalian 116001Liaoning ProvinceChina Department of Pathology Jinshan Hospital of Fudan UniversityShanghai 201508China

BACKGROUND Serotonin receptor 2B(5-HT2B receptor)plays a critical role in many chronic pain *** possible involvement of the 5-HT2B receptor in the altered gut sensation of irritable bowel syndrome with diarrhea(IBS-D)was investigated in the present *** To investigate the possible involvement of 5-HT2B receptor in the altered gut sensation in rat model and patients with *** Rectosigmoid biopsies were collected from 18 patients with IBS-D and 10 patients with irritable bowel syndrome with constipation who fulfilled the Rome IV criteria and 15 healthy *** expression level of the 5-HT2B receptor in colon tissue was measured using an enzyme-linked immunosorbent assay and correlated with abdominal pain *** IBS-D rat model was induced by intracolonic instillation of acetic acid and wrap *** in visceral sensitivity and 5-HT2B receptor and transient receptor potential vanilloid type 1(TRPV1)expression were examined following 5-HT2B receptor antagonist *** in visceral sensitivity after administration of the TRPV1 antago-INTRODUCTION Irritable bowel syndrome(IBS)is a chronic functional bowel disorder characterized by recurrent abdominal pain with altered bowel habits that affects approximately 15%of the population worldwide[1].IBS significantly impacts the quality of life of *** the pathogenesis of IBS is not completely understood,the role of abnormal visceral sensitivity in IBS has recently emerged[2,3].5-Hydroxytryptamine(5-HT)is known to play a key role in the physiological states of the gastrointestinal *** 5-HT levels in IBS with diarrhea(IBS-D)patients were greater than those in healthy controls[4],suggesting a possible role of 5-HT in the pathogenesis of *** serotonin receptor 2(5-HT2 receptor)family comprises three subtypes:5-HT2A,5-HT2B,and *** 5-HT2 receptors exhibit 46%-50%overall sequence identity,and all of these receptors preferentially bind to Gq/

关键词： Diarrhea-predominant irritable bowel syndrome Serotonin receptor 2B Transient receptor potential vanilloid type-1 Visceral hypersensitivity Abdominal pain

过一硫酸盐体系中铜分布模式控制活性物种的产生和污染物降解路径

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Engineering 2024年第4期35卷 168-179页

作者： Ning Li Haoxi Dai Mengting He Jun Wang Zhanjun Cheng Beibei yan Wenchao Peng Guanyi Chen School of Environmental Science and Engineering&Tianjin Engineering Research Center of Bio Gas/Oil Technology Tianjin UniversityTianjin 300072China Department of Chemical Engineering Tianjin UniversityTianjin 300350China School of Mechanical Engineering Tianjin University of CommerceTianjin 300134China School of Science Tibet UniversityLhasa 850012China

The distribution pattern of metals as active centers on a substrate can influence the peroxymonosulfate(PMS)activation and contaminants ***,atomic layer deposition is applied to prepare Cu single atom(SA-Cu),cluster(C-Cu),and film(F-Cu)decorated MXene catalysts by regulating the number of deposition *** comparison with SA-Cu-MXene(adsorption energy(E_(ads))=-4.236 eV)and F-Cu-MXene(E_(ads)=-3.548 eV),PMS is shown to adsorb preferably on the C-Cu-MXene surface for activation(E_(ads)=-5.435 eV),realizing higher utilization *** SO_(4)^(·-)are generated in C-Cu-MXene/PMS system with steady-state concentration and 1–3 orders of magnitude higher than those in the SA-Cu-MXene and F-Cu-MXene activated PMS ***,the contribution of SO_(4)^(·-)oxidation to sulfamethoxazole(SMX)degradation followed the order,C-Cu-MXene(97.3%)>SA-Cu-MXene(90.4%)>FCu-MXene(71.9%),realizing the larger SMX degradation rate in the C-Cu-MXene/PMS system with the degradation rate constants(k)at 0.0485 min^(-1).Additionally,SMX degradation routes in C-Cu-MXene/PMS system are found with fewer toxic *** this work,we highlighted the importance of guided design of heterogeneous catalysts in the PMS *** metal distribution patterns need to be selected according to the actual water treatment *** sites could be then fully utilized to produce specific active species to improve the utilization efficiency of the oxidants.

关键词： Cu cluster Distribution pattern Peroxymonosulfate Active species Degradation routes

DNA methylation controlling abscisic acid catabolism responds to light to mediate strawberry fruit ripening

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Journal of Integrative Plant Biology 2024年第8期66卷 1718-1734页

作者： Yunfan Sun Xiaofang yang Rongrong Wu Shouzheng Lv Yunduan Li Haoran Jia Yuying yang Baijun Li Wenbo Chen Andrew C.Allan Guihua Jiang yan-Na Shi Kunsong Chen College of Agriculture&Biotechnology Zhejiang UniversityZijingang CampusHangzhou 310058China Institute of Horticulture Zhejiang Academy of Agricultural SciencesHangzhouZhejiang 310021China Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Zhejiang UniversityZijingang CampusHangzhou 310058China The State Agriculture Ministry Laboratory of Horticultural Plant Growth Development and Quality ImprovementZhejiang UniversityZijingang CampusHangzhou 310058China New Zealand Institute for Plant&Food Research Limited Private Bag 92169AucklandNew Zealand School of Biological Sciences University of AucklandPrivate Bag 92019AucklandNew Zealand

Phytohormones,epigenetic regulation and environmental factors regulate fruit ripening but their interplay during strawberry fruit ripening remains to be *** this study,bagged strawberry fruit exhibited delayed ripening compared with fruit grown in normal light,correlating with reduced abscisic acid(ABA) *** of the key ABA catabolism gene,ABA 8′-hydroxylase FaCYP707A4,was induced in bagged *** light exclusion whole genome DNA methylation levels were up-regulated,corresponding to a delayed ripening process,while DNA methylation levels in the promoter of FaCYP707A4 were suppressed,correlating with increases in transcript and decreased ABA *** indicated FaCRY1,a blue light receptor repressed in bagged fruit and FaAGO4,a key protein involved in RNA-directed DNA methylation,could bind to the promoter of *** interaction between FaCRY1 and FaAGO4,and an increased enrichment of FaAGO4 directed to the FaCYP707A4 promoter in fruit grown under light suggests FaCRY1 may influence FaAGO4 to modulate the DNA methylation status of the FaCYP707A4 ***,transient overexpression of FaCRY1,or an increase in FaCRY1 transcription by blue light treatment,increases the methylation level of the FaCYP707A4 promoter,while transient RNA interference of FaCRY1 displayed opposite *** findings reveal a mechanism by which DNA methylation influences ABA catabolism,and participates in light-mediated strawberry ripening.

关键词： ABA catabolism DNA methylation light ripening strawberry

英文科技期刊基于“学术+出版”办刊模式的探索——以《纳米材料科学(英文)》的办刊实践为例

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中国科技期刊研究 2024年第5期35卷 617-622页

作者：王维朗袁文全游滨薛婧媛颜永松重庆大学期刊社重庆沙坪坝400044 重庆大学出版社重庆沙坪坝401331

【目的】研究英文科技期刊“学术+出版”办刊模式,探索科技期刊高质量发展的思路,为一流科技期刊建设提供参考。【方法】以《纳米材料科学(英文)》的发展实践为切入点,分析“学术+出版”办刊模式的主要内涵,讨论“学术”与“出版”的主... 详细信息

【目的】研究英文科技期刊“学术+出版”办刊模式,探索科技期刊高质量发展的思路,为一流科技期刊建设提供参考。【方法】以《纳米材料科学(英文)》的发展实践为切入点,分析“学术+出版”办刊模式的主要内涵,讨论“学术”与“出版”的主要分工和职责。【结果】科技期刊“学术”方面重点在于以主编、编委为核心的学术团队,控制学术质量,确保科技期刊前端的内容质量;“出版”方面关键在于以期刊编辑为中心的出版团队,负责期刊的过程管理及后端的影响力提升。“学术”与“出版”相结合,确保科技期刊前端的内容质量、过程的规范标准及后端的影响提升。【结论】科技期刊“学术+出版”办刊模式,可实现“学术”与“出版”之间优势互补、互助共进,形成办刊合力,提升期刊发展的整体性和协同性,从而推动期刊高质量发展和一流科技期刊建设。

关键词：一流科技期刊办刊模式学术+出版高质量发展

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数字化转型对银行风险承担的差异性分析

金融论坛 2024年第7期 48-58页

作者：贾妍妍越婷婷天津财经大学金融学院天津300222

本文以2010-2021年中国商业银行为研究对象,探究数字化转型对银行事前及事后风险承担的差异化影响。结果表明:(1)数字化转型虽然会增加银行事前风险承担,但能够降低其事后风险承担;(2)数字化转型通过加剧银行竞争、促进数字金融发展两... 详细信息

本文以2010-2021年中国商业银行为研究对象,探究数字化转型对银行事前及事后风险承担的差异化影响。结果表明:(1)数字化转型虽然会增加银行事前风险承担,但能够降低其事后风险承担;(2)数字化转型通过加剧银行竞争、促进数字金融发展两个渠道,增加银行事前风险承担、降低事后风险承担;(3)银行效率提升增强数字化转型对银行事前风险承担的促进作用及对事后风险承担的抑制作用;(4)数字化转型对银行事前及事后风险承担的影响在大规模、上市及高资本充足率的银行中更显著。

关键词：数字化转型银行风险承担数字金融银行竞争

Enhanced ethanol oxidation over Pd nanoparticles supported porous graphene-doped MXene using polystyrene particles as sacrificial templates

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Rare Metals 2022年第9期41卷 3170-3179页

作者： Yi-Zhe Chen Ming Zhou Yu-Fu Huang yan-Yun Ma Luo-Yi yan Xin-Wen Zhou Xin-Zhou Ma xue-Ling Zhao Cheng Chen Juan Bai dong-Hai Lin Shanghai Engineering Research Center of Advanced Thermal Functional Materials Shanghai Key Laboratory of Engineering Materials Application and EvaluationSchool of Energy and MaterialsShanghai Polytechnic UniversityShanghai201209China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China College of Biological and Pharmaceutical Sciences China Three Gorges UniversityYichang443002China School of Materials Science and Hydrogen Energy Foshan UniversityFoshan528000China School of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD4000Australia

Fabrication of superior catalytic performance palladium-based catalysts with affordable cost is the key to develop direct ethanol fuel ***,Pd-decorated three-dimensional(3D)porous constructed from graphene oxide(GO)and MXene combining with polystyrene(PS)particles as sacrificial templates(Pd/GO-MXene-PS)to elevate the catalytic performance for ethanol oxidation was *** 3D porous interconnected structure of Pd/GO-MXene-PS was characterized by scanning electron microscope(SEM),transmission electron microscope(TEM)and Brunner−Emmet−Teller(BET).By optimizing the doping ratio of MXene to GO,the mass activity of Pd/GO_(5)-MXene_(5)-PS(2944.0 mA·mg^(−1))was 3.0 times higher than that of commercial Pd/C(950.4 mA·mg^(−1))toward ethanol oxidation in base ***,the rotating disk electrode(RDE)results demonstrated that Pd/GO5-MXene5-PS had a faster kinetics of ethanol *** enhanced ethanol oxidation over Pd/GO5-MXene5-PS could attribute to the excellent 3D interconnected porous structure,large surface area,good conductivity and homogeneous Pd *** work provided a new idea for creating 3D porous MXene composite materials in electrocatalysis.

关键词： Pd nanoparticles Ethanol oxidation Graphene MXene Polystyrene(PS)template Rotating disk electrode(RDE)

Superconvergence analysis of the finite element method for nonlinear hyperbolic equations with nonlinear boundary condition

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Applied Mathematics(A Journal of Chinese Universities) 2008年第4期23卷 455-462页

作者： SHI dong-yang LI Zhi-yan Department of Mathematics Zhengzhou Univercity Zhengzhou 450052 China Department of Mathematics Handan College Handan 056005 China

This paper discusses the semidiscrete finite element method for nonlinear hyperbolic equations with nonlinear boundary condition. The superclose property is derived through interpolation instead of the nonlinear H^1 projection and integral identity technique. Meanwhile, the global superconvergence is obtained based on the interpolated postprocessing techniques.

关键词： nonlinear hyperbolic equation nonlinear boundary condition superconvergence postprocessing technique

Cryptococcal pneumonia in a human immunodeficiency virusnegative patient: A case report

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World Journal of Clinical Cases 2020年第10期8卷 2038-2043页

作者： xue-Qin Jiang yan-Bei Zhang Department of Geriatric Respiratory and Critical Care Medicine The First Affiliated Hospital of Anhui Medical UniversityHefei 230022Anhui ProvinceChina

BACKGROUND Cases of cryptococcal pneumonia are frequently observed in patients with various innate or acquired immunodeficiencies,including organ transplant patients,cancer patients undergoing chemotherapy,patients with acquired immune deficiency syndrome,or patients on *** is most often used to treat this condition when it is *** SUMMARY In the present report,we describe the case of a 42-year-old human immunodeficiency virus-negative man with normal immune function who had cryptococcal pneumonia that was diagnosed after undergoing computed tomography-guided percutaneous lung *** successfully treated this patient via administration of 200 mg voriconazole twice per day for 9 *** This report provides evidence of the successful treatment of pulmonary cryptococcosis using voriconazole.

关键词： Pneumonia Cryptococcosis Voriconazole Case report