Reversed charge transfer induced by nickel in Fe-Ni/Mo2C@nitrogen-doped carbon nanobox for promoted reversible oxygen electrocatalysis

The interaction between metal and support is critical in oxygen catalysis as it governs the charge transfer between these two entities, influences the electronic structures of the supported metal, affects the adsorption energies of reaction intermediates, and ultimately impacts the catalytic performance. In this study, we discovered a unique charge transfer reversal phenomenon in a metal/carbon nanohybrid system. Specifically, electrons were transferred from the metal-based species to N-doped ca...     

Experimental study of the elastic scattering of ~(10)Be on ~(208)Pb at the energy of around three times the Coulomb barrier

Elastic scattering of 10Be on a 208Pb target was measured at ELab=127 MeV,which corresponds to three times the Coulomb barrier.The secondary 10Be beam was produced at the Radioactive Ion Beam Line in Lanzhou of the Heavy-Ion Research Facility in Lanzhou.The angular distribution of elastic scattering in the 10 Be+208Pb system shows a typical Fresnel diffraction peak.Optical model analysis of the angular distribution was performed using the Woods-Saxon,double-folding and global potentials.With the global potential,different density distributions were used.The results indicate that different density distributions for the projectile induce distinct effects in the angular distribution.     

关于确定“规定非比例伸长应力”的探索

关于确定“规定非比例伸长应力”的探索黄帆，刘承安（北京联合大学自动化工程学院北京１０００８３）（北京科技大学北京１０００８３）１引言高精度电子万能试验机采用两点法求弹性模量Ｅ，出现与传统值差别较大的问题［’］，已为用户所公认．但是，求得合适的Ｅ以后，...     

熊猫GH958工程菜单详解

熊猫GM958待机状态下按0718#*(*要长按)会出现一个隐藏的工程模式菜单,主要是一些用于测试和恢复的菜单,和其他的手机(比如夏新A6)比起来GM958的工程菜单有些简单。下面就是这个工程菜单相关选项的解释,供有兴趣的朋友参考。     

探索提高纸盆刚性的原理

探讨了提高扬声器纸盆刚性的问题.使用材料力学的通用分析方法,将纸锥等效为一根变截面梁,并对它进行了受力分析.结果表明,纸盆在工作时主要是受弯曲力矩的作用,在纸盆内部产生的最大应力也是来源于外力产生的弯矩,最大应力在纸锥的上下表面.根据分析结果,找到了提高纸盆刚性的理论依据,指出增加纸盆的厚度可以大幅度地提高纸盆的刚性,并参照提高构件刚性原理提出了一些提高纸盆刚性的方法.     

大型汽轮发电机的若干力学问题

本文对大型火力发电设备中的汽轮发电机设计与制造及运行中的若干力学问题作一简要的评述.列举了下述题目:(1)转子及轴系的振动问题;(2)定子铁芯及其支撑力学;(3)定子绕组端部振动问题;(4)发电机转子护环的强度;(5)发电机整机静动态力学特性与响应;(6)大件运输中的力学问题.