目的基于CiteSpace客观展示近20年来中医药治疗癌痛领域的发展现状及研究前沿。方法以中国知网、维普、万方三大数据库以及Web of Science核心合集收录的2000-01-01至2021-08-08中医药治疗癌痛研究相关中英文文献为研究对象,利用CiteSpa...目的基于CiteSpace客观展示近20年来中医药治疗癌痛领域的发展现状及研究前沿。方法以中国知网、维普、万方三大数据库以及Web of Science核心合集收录的2000-01-01至2021-08-08中医药治疗癌痛研究相关中英文文献为研究对象,利用CiteSpace V软件对文献的作者、机构、关键词分别进行统计分析并绘制相关科学知识图谱。结果共1982篇中文文献、215篇英文文献纳入分析,近20年来,中医药治疗癌痛领域的发文量总体呈上升趋势;各作者普遍发文量较低,核心团队尚未形成,其中发文量最高的核心学者为冯利教授;国内主要研究机构为南京中医药大学、湖南中医药大学、辽宁中医药大学附属医院、中国中医科学院广安门医院和上海中医药大学附属龙华医院,国外主要研究机构为美国的Mem Sloan Kettering癌症中心和韩国的庆熙大学,各机构间合作以地域聚集为主,跨地域的科研机构合作尚少;关键词聚类分析分别形成了13个具有代表性的聚类;肝癌与乳腺癌所致癌痛、中医护理和阿片类药物相关性便秘在近几年来得到了显著关注。结论中医药治疗是西医治疗的重要补充辅助手段,中西医结合治疗癌痛是未来的发展趋势。然而,中医药治疗癌痛领域的研究仍处在发展阶段,尚无突破性进展,“各自为政”的研究格局一定程度上限制了该领域的进一步发展。展开更多
La0.5Sm0.2Sr0.3MnO3/（Ag2O）x/2 （x = 0.00, 0.04, 0.08, 0.25, 0.30） samples were prepared by the solid-state reaction method, and their transport behaviors, transport mechanism, and magnetoresistance effect were stud...La0.5Sm0.2Sr0.3MnO3/（Ag2O）x/2 （x = 0.00, 0.04, 0.08, 0.25, 0.30） samples were prepared by the solid-state reaction method, and their transport behaviors, transport mechanism, and magnetoresistance effect were studied through the measurement and fitting of p-T curves. The results show that the element Ag takes part in reaction when the doping amount is small. Ag is mainly distributed at the grain boundary of the host material and is in metallic state when the doping amount is relatively large; then the system becomes a two-phase composite. A small amount of Ag doping can apparently increase grain-boundary magnetoresistance induced by the spin-dependent scattering. The resistivity of the sample doped with 30 mol% Ag is one order of magnitude smaller than that of low-doped samples, and its magnetoresistance in the magnetic field of 0.5 T and at 300 K is strengthened apparently reaching 9.4%, which is connected not only with the improvement of the grain-boundary structure of the host material but also with the decrease of material resistivity.展开更多
The samples of La0.6Dy0.1Sr0.3MnO3/（Ag2O）x/2（x = 0.00, 0.02, 0.04, 0.06, 0.08, 0.10, 0.20, 0.25, and 0.30） were prepared by using the solid-state reaction method.Their magnetic property, transport behavior, transp...The samples of La0.6Dy0.1Sr0.3MnO3/（Ag2O）x/2（x = 0.00, 0.02, 0.04, 0.06, 0.08, 0.10, 0.20, 0.25, and 0.30） were prepared by using the solid-state reaction method.Their magnetic property, transport behavior, transport mechanism and magnetoresistance effect were studied through the measurements of magnetization-temperature（M-T） curves, ρ-T curves and the fitting of ρ-T curves.The results indicated that Ag could take part in the reaction when the doping amount is small.However, when the doping amount is comparatively large, Ag as metallic state mainly deposits on the grain boundary of La0.6Dy0.1Sr0.3MnO3, and then the system forms a two-phase composite.When the Ag doping amount is 30% mole ratio, the resistivity of the sample is one order of magnitude smaller than that of low doped samples, and its peak of magnetoresistance at 292 K and in the magnetic field of 0.2 T strengthens apparently and reaches 16.3%, which is over 7 times as large as 2.2% of La0.6Dy0.1Sr0.3MnO3.The two-phase composite system of magnetoresistance based on perovskite manganite consists of two parts：intrinsic magnetoresistance and extrinsic magnetoresistance.However, extrinsic magnetoresistance comes from spin-dependent scattering（SDS） and spin-polarized tunneling（SPT）.Magnetoresistance near TC increases due to the contribution of intrinsic magnetoresistance and extrinsic magnetoresistance formed by SDS, and magnetoresistance at low temperature is extrinsic magnetoresistance formed by SPT.展开更多
金融市场存在性别比例失衡问题,男性在金融行业中占有主导地位。虽然现有行为金融文献研究发现男性与女性投资者在金融市场中的一些行为存在差异,比如股票交易频率(Fellner and Maciejovsky,2007)和股票投资意愿(Bannier and Neuberty,2...金融市场存在性别比例失衡问题,男性在金融行业中占有主导地位。虽然现有行为金融文献研究发现男性与女性投资者在金融市场中的一些行为存在差异,比如股票交易频率(Fellner and Maciejovsky,2007)和股票投资意愿(Bannier and Neuberty,2016),但是,男性与女性投资者股票交易决策偏见特征及其影响机理还尚不明晰。为此,文章以处置效应为研究视角,依据Frydman and Rangel(2014)的实验设计,实验检验了男性和女性投资者的处置效应差异及其内在影响机理,旨在回答女性投资者的股票交易决策是否优于男性。实验结果显示:女性投资者的股票交易决策并不优于男性,这主要表现为女性的处置效应显著高于男性;女性更多地非理性持有亏损股票,而男性较多地理性持有盈利股票;女性投资者的感知后悔与处置效应显著正相关,而男性投资者的感知后悔与处置效应不具有显著相关关系;与男性相比,女性投资者的感知后悔对处置效应的影响更强。这表明女性投资者的股票交易决策更容易受到后悔情绪的影响,偏离理性决策。文章厘清了处置效应的性别差异及其影响机理,丰富了处置效应性别差异的理论解释。相关部门应该加强女性投资者的宣传教育工作,倡导理性投资。女性投资者应该树立理性的投资理念,采取措施减少情绪体验对股票交易决策的不利影响。展开更多
基金supported by the Key Program of the National Natural Science Foundation of China (No. 19934003)the Grand Program of Natural Science Research of Anhui Education Department (No. ZD2007003-1)the Natural Science Research Program of Universities and Colleges of Anhui Province, China (Nos. KJ2008A19ZC, KJ2009B281Z, and KJ2009A053Z)
文摘La0.5Sm0.2Sr0.3MnO3/（Ag2O）x/2 （x = 0.00, 0.04, 0.08, 0.25, 0.30） samples were prepared by the solid-state reaction method, and their transport behaviors, transport mechanism, and magnetoresistance effect were studied through the measurement and fitting of p-T curves. The results show that the element Ag takes part in reaction when the doping amount is small. Ag is mainly distributed at the grain boundary of the host material and is in metallic state when the doping amount is relatively large; then the system becomes a two-phase composite. A small amount of Ag doping can apparently increase grain-boundary magnetoresistance induced by the spin-dependent scattering. The resistivity of the sample doped with 30 mol% Ag is one order of magnitude smaller than that of low-doped samples, and its magnetoresistance in the magnetic field of 0.5 T and at 300 K is strengthened apparently reaching 9.4%, which is connected not only with the improvement of the grain-boundary structure of the host material but also with the decrease of material resistivity.
基金supported by the Key Program of the National Natural Science Foundation of China (No. 19934003)the Grand Program of Natural Science Research of Anhui Education Department (No. ZD2007003-1)+1 种基金the Natural Science Research Program of Universities and Colleges of Anhui Province, China (No. KJ2008A34ZC No. KJ2009A053Z)
文摘The samples of La0.6Dy0.1Sr0.3MnO3/（Ag2O）x/2（x = 0.00, 0.02, 0.04, 0.06, 0.08, 0.10, 0.20, 0.25, and 0.30） were prepared by using the solid-state reaction method.Their magnetic property, transport behavior, transport mechanism and magnetoresistance effect were studied through the measurements of magnetization-temperature（M-T） curves, ρ-T curves and the fitting of ρ-T curves.The results indicated that Ag could take part in the reaction when the doping amount is small.However, when the doping amount is comparatively large, Ag as metallic state mainly deposits on the grain boundary of La0.6Dy0.1Sr0.3MnO3, and then the system forms a two-phase composite.When the Ag doping amount is 30% mole ratio, the resistivity of the sample is one order of magnitude smaller than that of low doped samples, and its peak of magnetoresistance at 292 K and in the magnetic field of 0.2 T strengthens apparently and reaches 16.3%, which is over 7 times as large as 2.2% of La0.6Dy0.1Sr0.3MnO3.The two-phase composite system of magnetoresistance based on perovskite manganite consists of two parts：intrinsic magnetoresistance and extrinsic magnetoresistance.However, extrinsic magnetoresistance comes from spin-dependent scattering（SDS） and spin-polarized tunneling（SPT）.Magnetoresistance near TC increases due to the contribution of intrinsic magnetoresistance and extrinsic magnetoresistance formed by SDS, and magnetoresistance at low temperature is extrinsic magnetoresistance formed by SPT.
文摘金融市场存在性别比例失衡问题,男性在金融行业中占有主导地位。虽然现有行为金融文献研究发现男性与女性投资者在金融市场中的一些行为存在差异,比如股票交易频率(Fellner and Maciejovsky,2007)和股票投资意愿(Bannier and Neuberty,2016),但是,男性与女性投资者股票交易决策偏见特征及其影响机理还尚不明晰。为此,文章以处置效应为研究视角,依据Frydman and Rangel(2014)的实验设计,实验检验了男性和女性投资者的处置效应差异及其内在影响机理,旨在回答女性投资者的股票交易决策是否优于男性。实验结果显示:女性投资者的股票交易决策并不优于男性,这主要表现为女性的处置效应显著高于男性;女性更多地非理性持有亏损股票,而男性较多地理性持有盈利股票;女性投资者的感知后悔与处置效应显著正相关,而男性投资者的感知后悔与处置效应不具有显著相关关系;与男性相比,女性投资者的感知后悔对处置效应的影响更强。这表明女性投资者的股票交易决策更容易受到后悔情绪的影响,偏离理性决策。文章厘清了处置效应的性别差异及其影响机理,丰富了处置效应性别差异的理论解释。相关部门应该加强女性投资者的宣传教育工作,倡导理性投资。女性投资者应该树立理性的投资理念,采取措施减少情绪体验对股票交易决策的不利影响。
