Based on the theoretical models for light nuclei, the calculations of reaction cross sections and the angular distributions for d ＋^8Li reaction are performed. Since all of the particle emissions are from the compoun...Based on the theoretical models for light nuclei, the calculations of reaction cross sections and the angular distributions for d ＋^8Li reaction are performed. Since all of the particle emissions are from the compound nucleus to the discrete levels, the angular momentum coupling effect in pre-equilibrium mechanism is taken into account. The three- body break-up process and the recoil effect are involved. The theoretical calculated results are compared to existing experimental data.展开更多
目的:应用网状Meta分析方法,比较不同活血化瘀类中成药治疗糖尿病视网膜病变(DR)的临床有效率、实验室指标改善情况及治疗的安全性。方法:通过检索中国知网(CNKI)、万方数据知识服务平台、维普期刊资源整合服务平台(VIP)、Web of Scienc...目的:应用网状Meta分析方法,比较不同活血化瘀类中成药治疗糖尿病视网膜病变(DR)的临床有效率、实验室指标改善情况及治疗的安全性。方法:通过检索中国知网(CNKI)、万方数据知识服务平台、维普期刊资源整合服务平台(VIP)、Web of Science及Pubmed等数据库获得关于活血化瘀类中成药治疗DR的临床随机对照研究,检索时限为建库至2023年4月10日,并对所检索到的文献进行筛选提取资料,通过Stata 16.0软件实施网状Meta分析。结果:最终纳入63项研究,分析结果显示:复方丹参滴丸+羟苯磺酸钙胶囊总体疗效最为显著;芪明颗粒+羟苯磺酸钙胶囊在改善DR患者视力方面疗效最为显著;复方血栓通胶囊+羟苯磺酸钙胶囊在改善DR患者黄斑厚度及视野灰度值方面疗效最好;和血明目片+羟苯磺酸钙胶囊在减小患者血管瘤体积方面疗效较好;治疗组与对照组均有不良反应报道,治疗组不良反应总体较少。结论:与单用羟苯磺酸钙胶囊比较,活血化瘀类中成药联合羟苯磺酸钙胶囊治疗DR患者,可提高临床有效率,改善患者实验室检查指标,减少不良反应。展开更多
Lithium-sulfur(Li-S)batteries are considered highly promising as next-generation energy storage systems due to high theoretical capacity(2600 Wh kg^(-1))and energy density(1675 mA h g^(-1))as well as the abundant natu...Lithium-sulfur(Li-S)batteries are considered highly promising as next-generation energy storage systems due to high theoretical capacity(2600 Wh kg^(-1))and energy density(1675 mA h g^(-1))as well as the abundant natural reserves,low cost of elemental sulfur,and environmentally friendly properties.However,several challenges impede its commercialization including low conductivity of sulfur itself,the severe“shuttle effect”caused by lithium polysulfides(LiPSs)during charge–discharge processes,volume expansion effects and sluggish reaction kinetics.As a solution,polar metal particles and their compounds have been introduced as the main hosts for sulfur cathode due to their robust catalytic activity and adsorption capability,effectively suppressing the“shuttle effect”of Li PSs.Bimetallic alloys and their compounds with multi-functional properties exhibit remarkable electrochemical performance more readily when compared to single-metal materials.Well-designed bimetallic materials demonstrate larger specific surface areas and richer active sites,enabling simultaneous high adsorption capability and strong catalytic properties.The synergistic effect of the“adsorption-catalysis”sites accelerates the adsorptiondiffusion-conversion process of Li PSs,ultimately achieving a long-lasting Li-S battery.Herein,the latest progress and performance of bimetallic materials in cathodes,separators,and interlayers of Li-S batteries are systematically reviewed.Firstly,the principles and challenges of Li-S batteries are briefly analyzed.Then,various mechanisms for suppressing“shuttle effects”of Li PSs are emphasized at the microscale.Subsequently,the performance parameters of various bimetallic materials are comprehensively summarized,and some improvement strategies are proposed based on these findings.Finally,the future prospects of bimetallic materials are discussed,with the hope of providing profound insights for the rational design and manufacturing of high-performance bimetallic materials for LSBs.展开更多
In order to describe charge exchange reactions at intermediate energies,we implemented as a first step the formulation of the normal eikonal approach.The calculated differential cross-sections based on this approach d...In order to describe charge exchange reactions at intermediate energies,we implemented as a first step the formulation of the normal eikonal approach.The calculated differential cross-sections based on this approach deviated significantly from the conventional DWBA calculations for CE reactions at 140 MeV/nucleon.Thereafter,improvements were made in the application of the eikonal approximation so as to keep a strict three-dimensional form factor.The results obtained with the improved eikonal approach are in good agreement with the DWBA calculations and with the experimental data.Since the improved eikonal approach can be formulated in a microscopic way,it is easy to apply to CE reactions at higher energies,where the phenomenological DWBA is a priori difficult to use due to the lack,in most cases,of the required phenomenological potentials.展开更多
基金supported by IAEA Coordinated Research Projects (CRPs) on Parameters for Calculation of Nuclear Reactions of Relevance to Non-energy Nuclear Applications under Grant No.12842/R2
文摘Based on the theoretical models for light nuclei, the calculations of reaction cross sections and the angular distributions for d ＋^8Li reaction are performed. Since all of the particle emissions are from the compound nucleus to the discrete levels, the angular momentum coupling effect in pre-equilibrium mechanism is taken into account. The three- body break-up process and the recoil effect are involved. The theoretical calculated results are compared to existing experimental data.
文摘目的:应用网状Meta分析方法,比较不同活血化瘀类中成药治疗糖尿病视网膜病变(DR)的临床有效率、实验室指标改善情况及治疗的安全性。方法:通过检索中国知网(CNKI)、万方数据知识服务平台、维普期刊资源整合服务平台(VIP)、Web of Science及Pubmed等数据库获得关于活血化瘀类中成药治疗DR的临床随机对照研究,检索时限为建库至2023年4月10日,并对所检索到的文献进行筛选提取资料,通过Stata 16.0软件实施网状Meta分析。结果:最终纳入63项研究,分析结果显示:复方丹参滴丸+羟苯磺酸钙胶囊总体疗效最为显著;芪明颗粒+羟苯磺酸钙胶囊在改善DR患者视力方面疗效最为显著;复方血栓通胶囊+羟苯磺酸钙胶囊在改善DR患者黄斑厚度及视野灰度值方面疗效最好;和血明目片+羟苯磺酸钙胶囊在减小患者血管瘤体积方面疗效较好;治疗组与对照组均有不良反应报道,治疗组不良反应总体较少。结论:与单用羟苯磺酸钙胶囊比较,活血化瘀类中成药联合羟苯磺酸钙胶囊治疗DR患者,可提高临床有效率,改善患者实验室检查指标,减少不良反应。
基金supported by the National Natural Science Foundation of China (52203066,51973157,61904123)the Tianjin Natural Science Foundation (18JCQNJC02900)+3 种基金National innovation and entrepreneurship training program for college students (202310058007)Tianjin Municipal college students’innovation and entrepreneurship training program (202310058088)the Science&Technology Development Fund of Tianjin Education Commission for Higher Education (Grant No.2018KJ196)State Key Laboratory of Membrane and Membrane Separation,Tiangong University。
文摘Lithium-sulfur(Li-S)batteries are considered highly promising as next-generation energy storage systems due to high theoretical capacity(2600 Wh kg^(-1))and energy density(1675 mA h g^(-1))as well as the abundant natural reserves,low cost of elemental sulfur,and environmentally friendly properties.However,several challenges impede its commercialization including low conductivity of sulfur itself,the severe“shuttle effect”caused by lithium polysulfides(LiPSs)during charge–discharge processes,volume expansion effects and sluggish reaction kinetics.As a solution,polar metal particles and their compounds have been introduced as the main hosts for sulfur cathode due to their robust catalytic activity and adsorption capability,effectively suppressing the“shuttle effect”of Li PSs.Bimetallic alloys and their compounds with multi-functional properties exhibit remarkable electrochemical performance more readily when compared to single-metal materials.Well-designed bimetallic materials demonstrate larger specific surface areas and richer active sites,enabling simultaneous high adsorption capability and strong catalytic properties.The synergistic effect of the“adsorption-catalysis”sites accelerates the adsorptiondiffusion-conversion process of Li PSs,ultimately achieving a long-lasting Li-S battery.Herein,the latest progress and performance of bimetallic materials in cathodes,separators,and interlayers of Li-S batteries are systematically reviewed.Firstly,the principles and challenges of Li-S batteries are briefly analyzed.Then,various mechanisms for suppressing“shuttle effects”of Li PSs are emphasized at the microscale.Subsequently,the performance parameters of various bimetallic materials are comprehensively summarized,and some improvement strategies are proposed based on these findings.Finally,the future prospects of bimetallic materials are discussed,with the hope of providing profound insights for the rational design and manufacturing of high-performance bimetallic materials for LSBs.
基金Supported by the the National Key R&D Program of China(2018YFA0404403)the National Natural Science Foundation of China(11535004,11775013,11875074,11875073)
文摘In order to describe charge exchange reactions at intermediate energies,we implemented as a first step the formulation of the normal eikonal approach.The calculated differential cross-sections based on this approach deviated significantly from the conventional DWBA calculations for CE reactions at 140 MeV/nucleon.Thereafter,improvements were made in the application of the eikonal approximation so as to keep a strict three-dimensional form factor.The results obtained with the improved eikonal approach are in good agreement with the DWBA calculations and with the experimental data.Since the improved eikonal approach can be formulated in a microscopic way,it is easy to apply to CE reactions at higher energies,where the phenomenological DWBA is a priori difficult to use due to the lack,in most cases,of the required phenomenological potentials.
