Results 131 to 140 of about 32,470 (201)
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Laser powder bed fusion (LPBF) can fabricate high‐entropy alloys (HEAs) with refined microstructure and enhanced mechanical properties. However, the deformation and fatigue mechanisms of Al‐containing HEAs produced by LPBF remain unclear. In this work, we systematically investigate the tensile properties, deformation mechanisms, and high‐cycle
Dan Zheng +4 more
wiley +1 more source
Mechanisms of activity hepatic stellate cells induced myeloid-derived suppressor cells accumulation and migration [PDF]
, 2015 原发性肝癌（hepatocellularcarcinoma，HCC）是全球第五大常见的恶性肿瘤，在肿瘤致死的病因中排名第三位。在全球，每年有超过50万人死于肝癌，且一半以上在中国。随着科学研究的发展，科研人员发现肝癌的发生发展不仅仅是病毒感染、环境因素、基因突变这些因素，肿瘤微环境对肿瘤的发生、发展、复发转移有着重要作用。肝脏是一个具有“免疫特赦”的脏器，肝癌微环境中的非实质细胞及其细胞因子是肝癌的免疫逃逸，复发转移的重要因素。 肝星状细胞（hepaticstellatecell，HSCs ...
许雅苹
core
Sexuality, Gender &Policy, Volume 9, Issue 2, May 2026.ABSTRACT Masculinity significantly influences men's health‐seeking behaviors, yet its intersection with legal frameworks and healthcare access in Sub‐Saharan Africa remains underexplored. This mixed‐methods study investigates how gender norms and structural barriers influence healthcare experiences among 60 middle‐aged men (aged 30–60 years) in Yaoundé,
Ikekhwa Albert Ikhile +1 more
wiley +1 more source
The Effects of EA-ACR Promoting Plasma Melatonin of Insomnia Rats induced by PCPA [PDF]
, 2016 失眠是现如今临床常见的一种睡眠障碍性疾病，也越来越受到全球范围的重视。目前对失眠的研究大多集中于临床研究中，而针对失眠的基础机制研究很少，还有待进一步完善。 褪黑素是近几年来研究较多的与失眠密切相关的一种激素。为了进一步探讨失眠的病理机制，本实验共选用36只雄性SD大鼠，采用PCPA腹腔注射致失眠模型，用耳甲区电针刺激的方法，通过测定大鼠体重、旷场试验及血浆褪黑素分泌水平变化，从而探讨耳甲区电针调节失眠大鼠睡眠情况的机制。 结果：（1）PCPA腹腔注射28-30h后,大鼠睡眠出现昼夜节律性改变 ...
徐伟伟
core
World Water Policy, Volume 12, Issue 2, May 2026.ABSTRACT Water governance has emerged as a critical analytical framework for addressing the complexity of socioecological water systems in contexts of increasing climate vulnerability and anthropogenic pressure. This study presents a systematic review and bibliometric analysis of 50 scientific articles indexed on water governance published between 2018
Roger Pichis‐García +1 more
wiley +1 more source
Gaoya dianqi, 2015 随着柔性直流输电技术与大功率电力电子技术的发展,高压直流输电技术得到了不断地发展,而高压直流断路器已成为限制直流电网发展的主要瓶颈问题之一。现有的机械式高压直流断路器能够在几十ms内断开电路,但对于高压直流输电系统,远不能达到要求。采用高速电磁斥力机构作为机械开关的操动机构能够克服上述缺点。文中对以电磁斥力机构作为操动机构的强制过零型高压直流断路器的拓扑结构和工作原理进行了详细介绍,并针对其工作原理,提出控制需求,进而对其控制单元进行了研究。最后在自研的40.5 k ...
邵敏 +6 more
doaj
The Chinese Shareholders' Risk Analysis and Prevention Mechanism [PDF]
, 2016 公司股东，即公司的出资人，俗称投资人。现实中，股东往往只看到了其对公司享有的权益，而忽视其对公司所承担的责任和义务。事实上，股东对公司享有权益的同时亦承担着风险。股东风险来源于股东自身承担的责任和义务以及股东关系人。股东应了解其风险并形成风险防范意识，建立风险防范机制，否则，股东权益将可能落空。 本文以股东利益相关者为主线，通过多个真实、具体案例对中国公司股东的风险现状进行分析，对股东风险进行系统性的梳理，从而找出股东的风险来源，进而作深入的论述并提出解决方法 ...
张伙星
core
Functional Ecology, Volume 40, Issue 5, Page 1151-1164, May 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phenology is crucial for understanding plant growth and climate feedback. It affects canopy structure, surface albedo, and carbon and water fluxes. While the influence of environmental factors on phenology is well‐documented, the role of plant intrinsic factors ...
Yunpeng Luo +8 more
wiley +1 more source
Gaoya dianqi, 1973 ASEA公司在超高压输电方面的研究工作,是在AEP—ASEA超高压联合研究机构[1][2]内进行的,其目的是: 1.从理论及实践的角度,探讨最高的系统电压; 2.根据选定的切实可行的系统电压范围,研究电力系统及设备。 根据联合研究机构的分工,AEP（美国电力公司）负责系统方面的研究（包括线路设计）,ASEA（瑞典通用电气公司）主要考虑设备方面的研制。在研究过程中,经常交换意见互通情报,保证了研究计划的顺利完成。
朱士全
doaj
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Functional Ecology, Volume 40, Issue 5, Page 1443-1460, May 2026.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