摘要：The Pt-based catalyst tends to be poisoned by carbon monoxide(CO)-like intermediates produced in fuel cell reactions,which seriously deteriorates its catalytic ***,noble metal Au with the capacity of resistance to CO-like intermediates poisoning was employed to construct multi-element Pt-based *** trimetallic NiPtAu hollow nanocrystals(HNCs)with different surface Au contents were synthesized to explore the role of Au in electrocatalysis for alkaline methanol oxidation reaction(MOR).The trimetallic NiPtAu-SRAu HNCs catalyst with the relative rich Au content(15.17 at%)on surface exhibits a much lower CO oxidation peak potential than the other HNCs counterpart and 20 wt%Pt/C,which indicates the more exceptional CO-resisting ***,the MOR specific activity of NiPtAu-SRAu HNCs(31.52 mA cm^−2)is 7 times higher than that of 20wt%Pt/C(4.50 mA cm^−2).This enhancement in catalytic activity as well as anti-CO poisoning capability for NiPtAu-SRAu HNCs can be mainly ascribed to the weakened CO adsorption due to the exposure of Au atoms on NiPt surface evidenced by the experimental data and density functional theory *** study not only investigates the role of Au in MOR catalysis but also could be helpful for designing and optimizing the electrocatalysts for high-active and robust fuel cell applications.

摘要：Sluggish water dissociation kinetics severely limits the rate of alkaline electrocatalytic hydrogen evolution reaction(HER).Therefore,finding highly active electrocatalysts and clarifying the mechanism of water dissociation are challenging but *** this study,we report an integrated nanoporous nickel(np-Ni)catalyst with high alkaline HER performance and the origin of the corresponding enhanced catalytic *** 1 mol L^(-1) KOH solution,this np-Ni electrode shows an HER overpotential of 20 mV at 10 mA cm^(-2),along with fast water dissociation *** excellent performance is not only attributed to the large surface area provided by the three-dimensional interconnected conductive network but also from the enhanced intrinsic activity induced by the unique surface *** studies reveal that the types of oxygen species that naturally form on the Ni surface play a key role in water ***,when the lattice oxygen almost disappears,the Ni surface terminates with_(ads)orbed oxygen(O_(ads)),exhibiting the fastest water dissociation *** functional theory calculation suggests that when O_(ads)acts as the surface termination of Ni metal,the orientation and configuration of polar water molecules are strongly affected by O_(ads).Finally,the H–OH bond of interfacial water molecules is effectively activated in a manner similar to hydrogen *** work not only identifies a high-performance and low-cost electrocatalyst but also provides new insights into the chemical processes underlying water dissociation,thus benefiting the rational design of electrocatalysts.

摘要：The overall water splitting for hydrogen production is an effective strategy to resolve the environmental and energy crisis. Here, we report a facile approach to synthesize the Ir-based multimetallic, hierarchical, double-coreshelled architecture(HCSA) assisted by oil bath reaction for boosting overall water splitting in acidic environment. The Ir Ni Cu HCSA shows superior electrocatalytic activity for hydrogen evolution reaction(HER) and oxygen evolution reaction(OER), which are comparable to commercial Pt/C and better than IrO2. The Ir Ni Cu HCSA exhibits remarkably catalytic efficiency as bifunctional catalyst for overall water splitting where a low cell voltage of 1.53 V is enough to drive a current density of 10 mA cm^-2 and maintains stable for at least 20 h. The presented work for the design and synthesis of novel Ir-based multimetallic architecture paves the way for highperformance overall water splitting catalysis.

摘要：国家高度重视中医药标准化的发展,中医药标准化对中医药发展有重要意义。已经发布的中医药地方标准涵盖了各地中医药医疗、保健、科研、教育、产业、文化各领域,是对中医药标准体系的重要补充,也为推动地方中医药事业发展起到了积极作用。但中医药地方标准的发展也存在各省市发展不均衡、体系尚不成熟以及中医药地方标准间的分类模糊、命名不严谨等问题。未来应注重加强中医药地方标准顶层设计,探索构建中医药地方标准体系,深化地方标准制修订方法学研究,并加强中医药地方标准的解读与宣贯推广工作。

摘要：美育工作在高校教育实践中具有重要意义,是校园文化育人的重要组成部分。由于校园文创产品有着继承和弘扬高校文化精神、体现高校历史积累与内涵的文化价值以及受众范围广、需求量大的经济价值,使校园文化创意产业逐步兴起。韶关学院地处文化资源丰富的粤北地区,为展示校园文化特色,该文围绕现状、意义、设计三个方面深入探寻新时代美育背景下校园文创产品设计研发路径。

摘要：铁路客站相较一般公共建筑具有更显著的高能耗特征,相应节能设计研究也已经有近20年历史。基于CiteSpace、Bicomb和SPSS等软件,对CNKI和WOS数据库中国内外相关文献,从时空分布、关键词词频、关键词聚类、研究热点变迁及未来发展预测多方面进行可视化分析,总结出国内由不同专业主导的4个研究方向,国外研究关注能源链、站域空间、全生命周期、节能实效四方面特征;发现国内外研究主体都相对单一,但在研究关注点上国外具有更系统化和整体性的差异。结合国内38个建成铁路客站的具体节能设计方式的相关性研究,探讨了我国铁路客站节能设计的发展特点与趋势,发现了当前设计系统化不足的特征,以求为未来我国的铁路客站节能研究和设计提供参考和借鉴。

摘要：提出了一种可扩展的分布式档案信息管理模型,该模型采用优化的数据组织结构,运用分页显示、数据缓存、分层数据压缩等一系列的技术方法,有效地解决了海量数据的存储和管理问题,提高了系统查询效率。同时详细描述了系统的扩展性设计方法,系统设计模型和多级的数据安全访问技术,最后运用多层结构设计实现了一个档案信息管理系统,从而验证了系统模型的可行性和性能。

摘要：结构稳定性的物理概念是开展结构抗屈曲概念设计及稳定性检算的基础。通过构造理想压杆稳定性分析的等效刚球模型,建立压杆直线位置扰动后状态与位于给定支撑面坐标原点的刚球干扰状态之间的联系,加深学生和结构工程师对弹性系统稳定性的直观理解。提出轴心受压构件在任意端部约束条件下静力稳定性判别的广义力增量准则,为多自由度系统扰动广义抗力及平衡稳定性提供物理解释,可用于判别结构非线性平衡路径中间状态的稳定性,并指明结构后屈曲平衡构型。

摘要：三维动画在Internet上有着广阔的应用和发展前景。VRML的提出使得在Internet上描述三维动画、定义可交互的虚拟世界成为可能,但在描述传统意义上的三维动画,如描述可随机播放的动画序列,VRML有一定的局限性。文章分析了传统意义上的三维动画的特征,将三维动画过程分解为三个组成部分:三维场景;三维物体运动(行为);运动(行为)时序关系。在此基础上,提出一种适应Internet环境的三维动画描述方法和相应的描述语言。

摘要：拔罐疗法在临床中发挥显著的作用。随着针灸学的发展,临床实践的应用,拔罐疗法发生了演变。系统地整理了欧洲拔罐疗法早期发展史、机制研究和发展,以期探究欧洲拔罐疗法的历史演变与现状。然而拔罐疗法的机制至今尚不明确,在今后对罐疗的研究上需要更大规模、设计更为严格的临床试验来支持其有效性。