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公共卫生事件下我国风险与避险资产溢出效应——基于收益与风险分析的视角

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管理科学学报 2024年第6期27卷 127-148页

作者：魏宇李霞飞梁超云南财经大学金融学院昆明650221 西南交通大学经济管理学院成都610031

始于2019年末的重大公共卫生事件对我国实体经济和各类资产市场带来了前所未有的冲击,也引发了对我国各类资产间溢出效应的广泛讨论.本研究利用基于时变参数向量自回归(TVP-VAR)模型的动态溢出指数框架及其频域扩展,探讨了该事件影响下... 详细信息

始于2019年末的重大公共卫生事件对我国实体经济和各类资产市场带来了前所未有的冲击,也引发了对我国各类资产间溢出效应的广泛讨论.本研究利用基于时变参数向量自回归(TVP-VAR)模型的动态溢出指数框架及其频域扩展,探讨了该事件影响下我国股市这一风险资产市场与四种潜在避险资产(国债、外汇、黄金和原油)市场间收益和波动溢出的时域和频域特征.实证结果表明:首先,在该事件冲击下,我国资产系统的总收益和总波动溢出指数及其三个频域成分都出现了前所未有的增加;其次,资产收益溢出的短期成分最大,而波动溢出则以长期成分为主;第三,系统的主要收益和波动溢出来源会因该事件的国内外发展趋势的变化而发生改变,且一些资产所扮演的角色在该事件期间产生了明显的周期性转变.具体来说,在收益溢出方面,国债和原油分别是中期和后期除股票以外的净收益的溢出来源,且在该事件中期,黄金虽然是短期收益溢出的净接收者,却是中长期收益溢出的净传递者.在波动溢出方面,股票和国债是严重时期和舒缓时期除原油以外的额外波动溢出来源,且此时股票和原油虽然是长期净波动溢出来源,却是中短期波动溢出的净接受者.随着该事件逐渐可控,原油仍是波动溢出的净传递者,而国债则成为了中短期波动溢出的净传递者和长期波动溢出的净接收者.最后,在严重时期,国债,外汇和黄金市场是股票市场风险较好的避风港,同时,持有原油资产空头也可以较好地对冲股票市场风险.

关键词：重大公共卫生事件股票市场避险资产收益溢出波动溢出

An All-Optical Diode Based on Plasmonic Attenuation and Nonlinear Frequency Conversion

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Chinese Physics Letters 2013年第9期30卷 136-140页

作者： REN Ming-liang ZHONG Xiao-lan CHEN Bao-Qin LI Zhi-Yuan Laboratory of Optical Physics Institute of PhysicsChinese Academy of SciencesP.O.Box 603Beijing 100190

We present the design of an all-optical diode in a metal-dielectric structure where plasmonic attenuation and quasi-phase-matching are harnessed to greatly improve its *** to the asymmetric design of the second-order nonlinear coefficient,different incident directions will ignite different plasmonic nonlinear processes,which compensate or accelerate plasmonic *** a result,a unidirectional output of plasmonic signal is *** designed all-optical diode shows advantages of low power consumption,short sample length,high isolation contrast,wide acceptance of structural and initial conditions,and tunable unidirectionality,and becomes of practical interest.

关键词： unidirectional Nonlinear matching

血清CD121a水平对急性心肌梗死PCI的疗效及预后评估价值探讨

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中国实用医药 2024年第19期19卷 68-71页

作者：张梦遥李国靖于宗良江苏大学附属昆山医院江苏省昆山市第一人民医院心血管内科 215300

目的探讨血清白细胞介素1受体Ⅰ型(IL-1R1,即CD121a)水平对急性心肌梗死(AMI)患者经皮冠状动脉介入治疗(PCI)的疗效及其预后的评估价值。方法选取行PCI的AMI患者30例作为AMI组,另将行冠状动脉造影完全正常者30例作为对照组。AMI组在PC... 详细信息

目的探讨血清白细胞介素1受体Ⅰ型(IL-1R1,即CD121a)水平对急性心肌梗死(AMI)患者经皮冠状动脉介入治疗(PCI)的疗效及其预后的评估价值。方法选取行PCI的AMI患者30例作为AMI组,另将行冠状动脉造影完全正常者30例作为对照组。AMI组在PCI术前、术后第2天、术后1周检测血清CD121a水平,对照组行冠状动脉造影前检测血清CD121a水平。AMI组患者出院后对其进行1年门诊随访或电话随访,询发是否发生主要不良心血管事件(MACE),并根据随访结果进行分类(发生和未发生MACE)。比较AMI组与对照组临床资料(高血压、糖尿病、吸烟、饮酒情况)及血脂指标(总胆固醇、甘油三酯、低密度脂蛋白胆固醇、高密度脂蛋白胆固醇)、心肌梗死(心梗)三项[肌酸激酶同工酶、心肌肌钙蛋白I(cTnI)、肌红蛋白]、炎症指标[超敏C反应蛋白(hs-CRP)]及心力衰竭(心衰)标志物[N末端B型钠尿肽前体(NT-proBNP)];比较对照组和AMI组(PCI术前、术后第2天、术后1周)血清CD121a水平;比较发生MACE和未发生MACE患者血清CD121a水平。结果 AMI组患者糖尿病占比26.7%、饮酒占比36.7%及总胆固醇(4.97±1.27)mmol/L、低密度脂蛋白胆固醇(3.45±1.18)mmol/L、肌酸激酶同工酶(179.16±88.07)U/L、cTnI(10.31±3.88)ng/ml、肌红蛋白(394.99±78.27)ng/ml、hs-CRP(13.39±5.13)mg/L、NT-pro BNP(600.72±96.22)pg/ml均显著高于对照组的3.3%、13.3%、(4.04±0.78)mmol/L、(2.46±0.66)mmol/L、(9.90±4.33)U/L、(0.10±0.01)ng/ml、(15.50±2.44)ng/ml、(3.88±0.54)mg/L、(87.85±16.05)pg/ml(P0.05)。AMI组PCI术前、术后第2天、术后1周的CD121a水平分别为(2387.68±537.75)、(2005.73±534.96)、(1670.23±441.83)pg/ml,均显著高于对照组的(1356.67±372.69)pg/ml(P<0.05);AMI组PCI术后第2天和术后1周血清CD121a水平较PCI术前降低(P<0.05);PCI术后1周血清CD121a水平显著低于PCI术后第2天(P<0.05)。对AMI患者持续随访1年,发生MACE的患者8例,未发生MACE的患者22例。发生MACE患者血清CD121a水平(2826.82±533.82)pg/ml显著高于未发生MACE患者的(2227.97±451.82)pg/ml(P<0.05)。结论血清CD121a水平对AMI患者PCI后的疗效有评估价值,且对远期不良预后有预测价值。

关键词：急性心肌梗死白细胞介素1受体Ⅰ型主要不良心血管事件经皮冠状动脉介入治疗炎症

不锈钢管螺旋筋海洋混凝土短柱轴压性能试验研究

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建筑结构学报 2024年第2期45卷 148-161页

作者：陈宗平刘丁瑗梁宇涵周济广西大学土木建筑工程学院广西南宁530004 南宁学院土木与建筑工程学院广西南宁530200 广西大学工程防灾与结构安全教育部重点实验室广西南宁530004

为研究不锈钢管螺旋筋海洋混凝土短柱的轴压性能,以螺旋筋直径与间距、纵筋直径与数量、螺旋筋与纵筋的截面配筋率之比为变化参数,设计了17组共51个轴压短柱进行静力加载试验,观察了短柱的受力破坏过程及形态,获取了轴向荷载-位移曲线... 详细信息

为研究不锈钢管螺旋筋海洋混凝土短柱的轴压性能,以螺旋筋直径与间距、纵筋直径与数量、螺旋筋与纵筋的截面配筋率之比为变化参数,设计了17组共51个轴压短柱进行静力加载试验,观察了短柱的受力破坏过程及形态,获取了轴向荷载-位移曲线及各钢材应变曲线,基于试验数据,分析各变化参数对该类短柱的承载力、轴压延性、耗能能力、损伤发展的影响规律。结果表明:短柱破坏形态均表现为不锈钢管局部屈曲压皱和混凝土斜向剪切破坏;配置螺旋筋和纵筋可以使短柱的承载力增大14.95%,延性系数增大73.25%,耗能系数增大19.69%,并抑制短柱的损伤发展;相同换算截面配筋率下,随螺旋筋间距增大(直径增大),短柱承载力、延性、耗能均呈递减趋势;随纵筋直径增大(数量减少),短柱承载力表现为先减小后增大、延性先增大后减小、耗能递减;螺旋筋与纵筋截面配筋率最优比值为0.875。最后提出了该类短柱的轴压承载力计算式,其计算值与试验值吻合良好。

关键词：海洋混凝土短柱不锈钢管螺旋筋轴压性能承载力计算

Disordered carbon structures enhance capacitive storage

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Green Carbon 2024年第3期2卷 320-321页

作者： Yu liang Zihao Xing Mengtian Huo Zengyu Han Alei Dang Bingcheng Luo Dongshuang Wu Jinfa Chang Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of ChemistryNortheast Normal UniversityChangchun 130024China School of Materials and Engineering Nanyang Technological UniversitySingapore 639798Singapore School of Materials Science and Engineering Northwestern Polytechnical UniversityXi'an 710072China College of Science China Agricultural UniversityBeijing 100083China

Electrochemical energy storage(EES)is a key technology in global research that focuses on the efficient storage and utilization of electrical energy generated from intermittent *** development of EES systems with high energy and power densities is essential for meeting the future energy demands of electrochemical capacitors,such as capacitors,which can store electrical energy obtained from intermittent sources and enable rapid energy transfer and *** double-layer capacitors(EDLCs)within porous carbon materials(Fig.1(a))are commercially popular because of their excellent conductivity and relatively low *** their advantages,the complex structure of nanoporous carbon materials hinders the optimization of supercapacitor *** previous research has suggested that adjusting the pore size of nanoporous carbon materials can enhance their capacitive performance,conflicting reports and the lack of a definitive correlation between capacitance and pore size remain issues[1].Understanding the relationship between the structure of carbon materials and their capacitance is crucial for designing devices with high energy densities.

关键词： carbon capacitance electrical

Repeated bacteremia and hepatic cyst infection lasting 3 years following pancreatoduodenectomy:A case report

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World Journal of Clinical Cases 2022年第25期10卷 9156-9161页

作者： Kun Zhang Heng-Li Zhang jing-Qiang Guo Chao-Yong Tu Xin-liang Lv jing-De Zhu Department of General Surgery Lishui HospitalZhejiang University School of MedicineLishui 323000Zhejiang ProvinceChina

BACKGROUND Simple hepatic cysts are commonly occurring lesions that are usually asymptomatic and require no *** cyst infection,however,is considered a severe *** report a case of hepatic cyst infection following pancreatoduodenectomy with repeated fever lasting for almost 3 years,and two cysts were infected *** SUMMARY A 72-year-old woman diagnosed with adenocarcinoma of duodenal papilla underwent pancreatoduodenectomy with Child *** then suffered repeated occurrences of bacteremia and hepatic cyst infection for 3 *** cultures were positive for Klebsiella pneumoniae and Escherichia coli a total of 7 times and 4 times,*** the early stage,we suspected that postoperative reflux cholangitis was the cause of fever and *** cysts were observed,so it was difficult to determine which cyst was *** repeat examination,we found the focus of infection,and we treated the patient with antimicrobials and performed percutaneous cyst *** patient did not experience another cyst infection for more than 4 *** Biliary reconstruction inducing hepatic cyst infection is easily misdiagnosed as biliary reflux infection,Repeated imaging examination is a method for identifying the infected focus.

关键词： Hepatic cyst Infection Percutaneous transhepatic drainage Case report

元治理视角下企业社会工作协同工会服务改革的模式探析——以S市L区工会改革为例

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山东工会论坛 2024年第3期30卷 75-86页

作者：梁良陈晓东广东白云学院广东广州510080 沈阳化工大学人文与艺术学院辽宁沈阳110142

工会改革是影响工会职能发挥与劳资关系问题解决的关键。传统的工会工作模式已难以满足新生代职工日益多元的需求,多元主体参与工会改革趋势下,企业社会工作如何协同工会改革,优化工会系统工作模式成为不可忽视的问题。本文通过对L区企... 详细信息

工会改革是影响工会职能发挥与劳资关系问题解决的关键。传统的工会工作模式已难以满足新生代职工日益多元的需求,多元主体参与工会改革趋势下,企业社会工作如何协同工会改革,优化工会系统工作模式成为不可忽视的问题。本文通过对L区企业社会工作协同参与工会改革的观察,发现:企业社会工作面临着独立性匮乏、专业性不足和职业性欠缺等协同挑战;在实践中结合元治理视角形成政策影响、资源筹措、关系协调、赋能发展、专业建设等经验,研究探索企业社工协同工会改革的“1234”服务模式。

关键词：元治理企业社工协同工会改革

董事会断裂带、内部控制与审计质量——基于制造业上市公司的数据

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南京审计大学学报 2024年第1期21卷 1-11页

作者：梁毕明郭振雄吉林财经大学会计学院吉林长春130117

断裂带的存在极容易使董事会形成不同的子群体,而子群体间的相互作用又会反向牵制和干扰董事会的监督能力,进而影响审计质量。以2013—2021年中国沪深A股制造业上市公司为样本,探究董事会断裂带对审计质量的影响。研究发现:首先,董事会... 详细信息

断裂带的存在极容易使董事会形成不同的子群体,而子群体间的相互作用又会反向牵制和干扰董事会的监督能力,进而影响审计质量。以2013—2021年中国沪深A股制造业上市公司为样本,探究董事会断裂带对审计质量的影响。研究发现:首先,董事会断裂带与审计质量呈倒U形关系,断裂带异常会干扰公司董事会监督职能的正常发挥,从而影响审计质量;其次,董事会断裂带与审计质量的倒U形关系主要源于任务导向断裂带的作用,在企业成熟期更为显著;最后,内部控制能够削弱董事会断裂带对审计质量的影响,而良好的内部控制有助于缓解股东与管理层的代理成本,弥补董事会子群体间冲突带来的负面影响,在合理范围内有效地提升审计质量。

关键词：董事会断裂带审计质量内部控制监督能力任务导向断裂带企业生命周期公司治理

Genomes of Meniocus linifolius and Tetracme quadricornis reveal the ancestral karyotype and genomic features of core Brassicaceae

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Plant Communications 2024年第7期5卷 68-89页

作者： Jie Liu Shi-Zhao Zhou Yun-Long Liu Bin-Yan Zhao Dongmei Yu Mi-Cai Zhong Xiao-Dong Jiang Wei-Hua Cui Jiu-Xia Zhao Juan Qiu liang-Min Liu Zhen-Hua Guo Hong-Tao Li Dun-Yan Tan Jin-Yong Hu De-Zhu Li CAS Key Laboratory for Plant Diversity and Biogeography of East Asia&Yunnan Key Laboratory of Crop Wild Relatives Omics Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Germplasm Bank of Wild Species&Yunnan Key Laboratory for Crop Wild Relatives Omics Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China College of Life Sciences Xinjiang Agricultural UniversityÜrümqi 830052China University of Chinese Academy of Sciences Beijing 100049China These authors contributed equally to this article

Brassicaceae represents an important plant family from both a scientific and economic ***,genomic features related to the early diversification of this family have not been fully characterized,especially upon the uplift of the Tibetan Plateau,which was followed by increasing aridity in the Asian interior,intensifying monsoons in Eastern Asia,and significantly fluctuating daily ***,we reveal the genomic architecture that accompanied early Brassicaceae diversification by analyzing two high-quality chromosome-level genomes for Meniocus linifolius(Arabodae;clade D)and Tetracme quadricornis(Hesperodae;clade E),together with genomes representing all major Brassicaceae clades and the basal *** reconstructed an ancestral core Brassicaceae karyotype(CBK)containing 9 pseudochromosomes with 65 conserved syntenic genomic blocks and identified 9702 conserved genes in *** detected pervasive conflicting phylogenomic signals accompanied by widespread ancient hybridization events,which correlate well with the early divergence of core *** identified a successive Brassicaceae-specific expansion of the class I TREHALOSE-6-PHOSPHATE SYNTHASE 1(TPS1)gene family,which encodes enzymes with essential regulatory roles in flowering time and embryo *** TPS1s were mainly randomly amplified,followed by expression *** results provide fresh insights into historical genomic features coupled with Brassicaceae evolution and offer a potential model for broad-scale studies of adaptive radiation under an ever-changing environment.

关键词： Cruciferae genomic features ancient hybridization core Brassicaceae karyotype CBK TREHALOSE-6-PHOSPHATE SYNTHASE 1 genes TPS1s