Results 31 to 40 of about 20,721 (119)
Wafer‐Scale Amorphous g‐C3N4 With Broadly Tunable Dielectric Properties for 2D Electronics
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Two‐dimensional (2D) semiconductors are regarded as promising candidates for next‐generation electronics due to their superior electrostatic control; however, their performance is severely constrained by the lack of suitable dielectric materials.
Binyin Gao +13 more
wiley +1 more source
Shuitu Baochi Xuebao, 2017 选取昆明市松华坝水源区典型小流域——迤者小流域为试验区，通过布设标准径流小区，在2009—2015年对坡耕地产流产沙及氮、磷流失情况进行长期的野外观测研究，从年际尺度上来探讨等高反坡阶对于坡耕地产流产沙及氮、磷等养分流失的影响。结果表明：等高反坡阶对于径流和泥沙的削减效果均较为明显，年平均减流率为50.64%，年平均减沙率74.99%，减沙率显著大于减流率；等高反坡阶对于径流和泥沙中氮、磷均有较为明显的削减效果，平均每年可以削减68.75%的氮流失和82.16%的磷流失 ...
王帅兵, 王克勤
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Developing high‐efficiency catalysts for the seawater urea oxidation reaction (UOR) is pivotal to advancing hydrogen production via seawater electrolysis. Defect engineering has established itself as a core strategy for regulating catalytic activity.
Xiaoyu Wu +11 more
wiley +1 more source
Gaoya dianqi, 2018 发生直流线路接地或极母线接地故障时,直流中性母线避雷器将产生很大的能量,为满足能量要求,中性母线避雷器采用了多柱并联的结构。为避免电流分配不均使某一柱避雷器阀片吸收能量过大损坏,必须严格控制多柱并联避雷器的电流分布不均匀系数。目前判断多柱并联避雷器均流特性优劣的方法为测试通过单柱1001 000 A的雷电冲击电流下的不均匀系数不大于1.1。而通过直流中性母线避雷器的电流波形与测试采用的波形相差较大,文中结合直流中性母线避雷器典型电流幅值和波形,开展电流分布试验,验证电流分布特性是否符合要求 ...
卢文浩 +3 more
doaj
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 1, Page 88-98, July 2026.ABSTRACT Objective To identify prenatal predictors of tuberous sclerosis complex (TSC) in fetuses with one or more cardiac rhabdomyomas (CR), evaluate an integrated multimodal diagnostic workflow using fetal magnetic resonance imaging (MRI) and trio whole‐exome sequencing (trio‐WES) and characterize perinatal outcomes.
X. Cai +8 more
wiley +1 more source
Zhendong Ceshi yu Zhenduan为了研究在流固耦合效应下不同来流对超高层建筑风效应特性的影响，采用分离涡方法（detached eddy simulation，简称DES）对深圳平安金融大厦气弹模型进行全尺寸数值风洞模拟，利用湍流脉动生成（discretizing and synthesizing random flow field generation，简称 DSRFG）方法模拟大气边界层湍流和均匀来流，得到模型的风压和风致响应结果，并与风洞试验和现场实测数据进行对比。研究结果表明 ...
doaj +1 more source
The Photogrammetric Record, Volume 41, Issue 195, July‐September 2026.Tri‐stereoscopic PeruSat‐1 imagery enables the simultaneous generation of 0.70 m‐resolution topography and spatially distributed Manning roughness maps, achieving 0.434 m vertical accuracy. Integrated into HEC‐RAS, these products provide consistent, high‐resolution inputs that improve hydraulic modelling and flood risk assessment in data‐scarce river ...
Jorge L. Miranda‐Pita +3 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
Structural Modulation of Magnetic Softness in Fe‐Based Amorphous Alloys via Pulse Current Training
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Fe‐based amorphous alloys, despite their intrinsically low magnetocrystalline anisotropy, suffer from quasi‐dislocation dipoles and localized stress fields that impede domain‐wall motion and increase coercivity. Here, we introduce pulse current training (PCT) as an energy‐efficient technique to overcome these limitations in a Fe76Si9B10P5 ...
Shumin Ye +13 more
wiley +1 more source