Results 51 to 60 of about 23,176 (169)
ABSTRACT Transnational collaboration is critical for water‐security innovation, yet actor configurations and thematic priorities remain poorly characterized. We surveyed 92 Australian and Brazilian researchers from the Tropical Water Research Alliance (TWRA), analyzing 11 sets of binary variables on collaboration modes, stakeholders, implementation ...
A. P. Matei +7 more
wiley +1 more source
为了研究高海拔地区特高压分裂导线的起晕特性和电晕损失特性,研制了一套集成化光电式电晕损失测量系统。测量系统由远端光通信采集模块,本地合并单元和上位机软件组成。远端光通信采集模块与本地合并单元之间采用光纤传输,通过光脉冲触发保证导线电晕电流和电压的精确同步采集。采用Labview开发了上位机软件,本地合并单元与上位机之间以UDP通信协议通讯。在实验室用信号发生器对测量系统进行角差、比差测定,测量结果表明 ...
刘云鹏 +5 more
doaj
Erosion corrosion behavior of AISI 304/316 stainless steel [PDF]
304/316不锈钢以其良好的抗腐蚀性能和机械性能而得到广泛应用,尤其是在核电行业。然而,在其应用中存在着冲蚀磨损,腐蚀磨损,应力腐蚀开裂和高温氧化等问题。本文研究了304/316不锈钢两相射流冲蚀磨损行为,在NaCl、HCl和NaOH中的腐蚀磨损行为,在实验室模拟压水堆条件下的应力腐蚀开裂和高温氧化腐蚀行为。 (1)本文通过两相高速射流对304/316不锈钢的冲蚀实验,通过失重法和材料表面形貌、结构和成分微观分析,研究材料冲蚀磨损失效过程以及冲蚀机理分析 ...
周芳
core
Read the free Plain Language Summary for this article on the Journal blog. Abstract The stoichiometric imbalance caused by nitrogen (N) deposition typically exacerbates phosphorus (P) limitation in plants. However, it remains unclear whether this effect extends to soil microbes, particularly those in the rhizosphere.
Jipeng Wang +5 more
wiley +1 more source
针对传统的局部放电检测方法在线测量时易受外界干扰的问题,笔者在实验室建立了变压器中典型局部放电的模拟系统,并用超高频宽带和窄带测量系统对其测量,分析比较两种测量系统性能上的不同。经测量分析得出,超高频窄带检测方法对检测信号的中心频率和带宽可调,可以选择合适的频带来避开干扰测量,抗干扰能力很强;超高频宽带检测方法检测频带宽,可以检测到更丰富的局部放电信息。
李梅
doaj
[Design of a dynamic measurement system for Bl factor spatial distribution of resonant blood viscoelastic sensor]. [PDF]
Qian J, Sun H, Wang B.
europepmc +1 more source
Metal Atomic Wires and Single Molecular Junction: Nanoconstruction by STM and Their Quantum Transport [PDF]
金属原子线和金属-分子-金属结(分子结)等异质结是纳/分子电子学中研究最广泛的基本单元,它们表现出特殊的量子输运性质,如何构建这些分子尺度的异质结、表征其电荷输运行为并且探究调控电导的因素,是该领域当前的重要研究内容。STM裂结法(Scanningtunnelingmicroscopebreakjunction,STMBJ)是目前研究金属原子线和分子结的成熟方法之一,不仅可以快速重复地构建异质结,得到大量的可用于统计分析的电导曲线,也可以对异质结进行I–V表征。本论文主要运用STMBJ技术 ...
梁景洪
core
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang +4 more
wiley +1 more source
Fabrication of Mechanically Controllable Break Junction Microchip and Simulation by Material Mechanics [PDF]
当“自下而上”途径组装器件的理念被提出后,美国科学家费曼继而提出小尺度上的操作和控制物质材料,这两个理念引导下产生的分子电子学成为备受人们关注的交叉性学科。过去的六十年里,分子电子学获得了飞速的发展,尤其是世纪之交的十年可谓是“分子电子学的黄金十年”,科学家们接连得到单原子、单分子尺度上的物理化学性质并付诸应用。然而,分子电子学研究的基本结构单元仍是金属/分子/金属结,而其构筑方法的不稳定性和表征手段不重现及单一性仍然是分子结的构筑和表征研究中面临的主要困境。 本论文工作以构筑稳定分子结为目标 ...
冯石
core

