Results 41 to 50 of about 9,587 (155)

Yttrium Addition Co‐Enhances the Plasticity and Corrosion Resistance of TiB2‐Refined Al‐Mg‐Zn Alloys

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT To address the degradation of corrosion resistance induced by Al‐5Ti‐B grain refiner during the strengthening of Al‐Mg‐Zn alloys, this study innovatively employed a rare earth element yttrium (Y) alloying strategy to achieve synergistic enhancement of mechanical strength and corrosion resistance.
Wen‐Tao Qin   +9 more
wiley   +1 more source

雷击分流接地系统地电位特性试验及仿真分析

open access: yesDianci bileiqi, 2015
建筑物接地系统雷电冲击特性主要是指雷电流通过接地装置向周围大地散流的特征,通常表现为冲击电流对接地装置作用后局部暂态地电位升高导致地电位反击。利用土壤测试数据及接地系统图模拟实际建筑物接地模型下雷击冲击试验反击地电位特性,通过搭建CDEGS地电位仿真模型实现地电位分布计算并验证了反击试验结果的可靠性,得出地电位分布与注入点位置、接地系统支路分布之间影响关系,对雷击分流接地系统预防地电位反击提出了合理优化措施。
朱泽伟   +4 more
doaj  

浅析电子商务环境下泸州农特产的发展

open access: yes计算机系统网络和电信, 2019
本文旨在研究电子商务平台下四川省泸州市地区农特产的发展前景,由于泸州好山好水地理位置的优越,针对它的优处把它放入电商平台,形成科学系统现代化的销售模式,可以进行对农特产的良好打造,推动农村特产的销售,进一步的推动农特产走出泸州推向世界。
何 丽, 张 铷钫, 杨 晨, 李 晨曦
semanticscholar   +1 more source

Gallium‐Doped α‐MnO2 Cathode for High‐Performance Aqueous Zinc‐Ion Batteries

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Rechargeable aqueous zinc‐ion batteries (ZIBs) have received significant attention because of their high safety and low cost. MnO2 as a cathode material hampers the application of ZIBs due to its structural instability and dissolution during the operation of the battery.
Wen‐yu Xu   +13 more
wiley   +1 more source

A Mini Review of Scientific Designs of Dynamic Responsive Fluids in Battery Technologies

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Dynamic responsive fluids are emerging as transformative elements in the evolution of battery technologies, marking a pivotal shift from static passive designs toward systems that actively sense and adapt to their operating environments. By integrating dynamic responsive fluids, batteries can interact with both internal and external stimuli in
Xiu‐Zhen Yang   +11 more
wiley   +1 more source

计及地电位升高的HVDC输电线路离子流场的计算

open access: yesGaoya dianqi, 2012
超高压直流(high voltage direct current,HVDC)输电线路离子流场的计算对于输电线路的设计具有重要意义。然而考虑地电位升高的地面离子流场的计算却很少,为此,在Deutsch假设的基础上,为了研究计及地电位升高时HVDC输电线路产生的离子流场,将地电位升高作为第1类边界条件,应用模拟电荷法,建立了考虑地电位升高影响的HVDC输电线路下方离子流场计算模型。计算结果表明,在不计及地电位下,与可查询的文献相比,计算结果与其基本一致。计及地电位下,地面离子流密度与电场的值分别有所增大 ...
李永明   +4 more
doaj  

Participation Disenchants: How Online Political Participation Decreases Online Political Efficacy in China

open access: yesRegulation &Governance, Volume 20, Issue 1, Page 35-63, January 2026.
ABSTRACT Existing literature largely agrees that authoritarian regimes establish channels for political participation to gather valuable information on citizens' anti‐regime sentiments and policy preferences and to supervise lower‐level bureaucrats and firms.
Anton Bogs
wiley   +1 more source

Predicting Spatial Distributions of Mammalian Predation on Translocated Wild Turkeys in Agriculturally Dominated Landscapes 在以农业为主的景观中哺乳动物对易地放归的野生火鸡捕食的空间分布预测

open access: yesWildlife Letters, Volume 3, Issue 3, Page 91-98, September 2025.
The edge densities of cropland, developed land, and water bodies (panel a) predict the spatial probability of mammalian predation on wild turkeys (panel b) using Mahalanobis distance factor analysis in Quitman County, Mississippi, United States. The three habitat fragmentation variables are represented by three arrows, respectively.
Guiming Wang   +2 more
wiley   +1 more source

计及地电位升高的超高压交流输电线路工频电场计算

open access: yesGaoya dianqi, 2010
为研究地电位升高时超高压交流输电线路产生的工频电场,将地电位升高作为第一类边界条件,应用模拟电荷法,建立了考虑地电位升高影响的超高压交流输电线路下方工频电场计算模型。与CDEGS软件计算结果的对比表明,该方法是可行、有效的。同时分析了不同地电位升高值、导线高度及导线排列方式下,地电位升高对超高压输电线路工频电场的影响。提出对地电位升高区域内的工频电场暴露应给予更多关注并采取相应的限制措施。
俞集辉, 王国辉
doaj  

点源干扰源定位方法及其在地电场观测中的实际应用

open access: yesDizhen xuebao
我国地震地电场观测时的漏电干扰问题会影响到观测质量和地震监测效能。针对这一实际问题,本文提出了点源干扰源定位方法。该方法首先建立地表点源对地电场观测影响模型,根据模型计算点源对地电场观测的干扰幅度,然后求解干扰源相对于中心电极的位置。将定位方法应用于高邮地震台和汉王地震台实际干扰源排查工作中,定位结果与实际干扰源位置基本一致,测区外干扰源定位误差小于2%,测区内干扰源定位误差小于20 m,并对影响计算误差的因素进行了分析。两个台站的实际应用表明 ...
Yu Zhang   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy