Results 31 to 40 of about 495,326 (144)
Poverty &Public Policy, Volume 18, Issue 3, September 2026.ABSTRACT This paper examines the impact of the COVID‐19 pandemic on income and wealth inequality in Switzerland, with a particular focus on poverty dynamics and the role of the social security system. Using newly linked administrative tax data for four large cantons covering over a third of the Swiss population, we track changes in household income and
Oliver Hümbelin +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 准确测量坡面薄层水流流速是分析和计算水动力学参数的前提，也是建立土壤侵蚀模型的基础。设置5个坡度（5°，10°，15°，20°，25°）和4个放水流量（2，4，8，16 L/min），采用长12 m、宽0.1 m、高0.3 m的水槽对坡面薄层水流流速进行了测量。通过记录水流前锋（前沿）流过水槽的时间计算水流的前沿流速，并采用染色剂示踪法和电解质脉冲法测量水流的平均表层流速和平均流速，与前沿流速进行对比。结果表明：试验的前沿流速为0.237~1.290 m/s，且随着坡度和流量的增大呈增大趋势 ...
杨大明 +4 more
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Tin‐based composite oxides typically undergo severe volume variations and exhibit poor intrinsic conductivities despite their high theoretical capacity as promising anode candidates for sodium‐ion batteries. This results in rapid structural degradation and capacity fading upon cycling.
Yongmei Sun +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Aqueous zinc batteries hold great promise for large‐scale energy storage, yet their practical application is hindered by dendrite growth and interfacial side reactions on the zinc anode. Inspired by the industrially mature chromate passivation technology, this work reports an in situ construction of a chromium‐rich passivation layer (Zn@Cr) on
Long Huang +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 通过对比分析坡面水流的水动力参数与径流溶质迁移量间的关系,研究了不同地表状况下黄土坡面土壤溶质随径流迁移的水动力学特性,以求深入了解和认识坡面土壤侵蚀中溶质随径流迁移的本质机理。研究结果表明:不同坡面地表状况下,糙率系数和平均水深之比(n/h)与侵蚀过程中随径流迁移的溶质存在一定的关系,径流溶质Br-平均浓度、径流溶质Br-的平均流失率以及径流溶质Br-的相对流失量均随n/h的增加而减小。径流溶质Br-的平均流失率以及径流溶质Br-的相对流失量与水流水动力学参数n/h具有指数关系。
郭太龙, 王全九
doaj
彩色多普勒超声检测门静脉、脾静脉血流动力学在肝硬化食管胃底静脉曲张患者中的临床应用研究
Zhongguo shiyan zhenduanxue, 2023 目的 探讨彩色多普勒超声检测门静脉、脾静脉血流动力学在肝硬化食管胃底静脉曲张患者中的临床应用价值。方法 选取2018年1月-2021年12月于华北理工大学附属医院住院的肝硬化伴食管胃底静脉曲张患者88例为病例组。选择同期住院的肝硬化不伴有食管胃底静脉曲张患者102例为对照组。观察两组患者门静脉、脾静脉血流动力学变化情况。结果 病例组在总横断面表面积、胃左静脉直径、肠系膜上静脉直径高于对照组，在曲张静脉壁厚度低于对照组，差异均有统计学意义 ...
刘水澎, 张国顺
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT In laser‐directed energy deposition (LDED) of TiC/Ti6Al4V composites, a low content of micron‐sized TiC provides a good strengthening effect on hardness and strength, but the improvement in plasticity remains a challenge. By introducing synchronous ultrasonic impact treatment (UIT) into the LDED process, an ultrasonic‐assisted LDED (UA‐LDED ...
Yuzhou Zeng +9 more
wiley +1 more source
Dianci bileiqi, 2014 根据城轨供电系统的特点分析了雷击城轨整流变电站附近杆塔时对整流变电站的影响方式,认为与铁轨并联的均流线和接触网末端的绝缘配置会引起雷击杆塔时过电压入侵到整流变电站,而整流变电站避雷器接地散流效果和均压效果不好是引起整流变电站事故的主要原因。针对避雷器接地和均流线接地散流和均压不良设计了新的接地装置,并用ANSYS软件对比分析了新的接地装置和原有接地装置的接地性能,分析结果表明:新型接地装置的均压效果相对于原有接地装置的均压效果其最大地电位减小了28 ...
张东, 陶凤源, 董新胜
doaj
World Medical &Health Policy, Volume 18, Issue 3, September 2026.ABSTRACT Confrontational violence still puts catastrophic burdens on children, with 2024 being the highest recorded levels of displacement, malnutrition, injury, and deprivation in contemporary humanitarian history. Children's surgical care is still grossly underrepresented in health responses worldwide in the prevention of avoidable deaths and long ...
Gaurav Chanderprakash Mittal +4 more
wiley +1 more source