Results 111 to 120 of about 64,092 (179)
Gaoya dianqi, 2019 为精确旋转磁场强度的测量结果,文中利用有限元仿真软件建立三维电磁场模型,比较了两种主要磁场的测量方法,即H线圈和罗氏线圈的测量误差,得出H线圈测量结果更加准确的结论并对此作出解释。在此基础上,研究了H线圈的测量距离与测量误差的关系,并将研究结果应用至试验过程中,减小了实际测量结果的误差。
师泯夏 +7 more
doaj
[Reliability and validity of the 6-item UCLA Loneliness Scale(ULS-6)for application in adults]. [PDF]
Nan Fang Yi Ke Da Xue Xue Bao, 2023 Xiao R, DU J.
europepmc +1 more source
World Water Policy, Volume 12, Issue 2, May 2026.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
Gaoya dianqi, 2010 绝缘油中含气量测定是GB/T 7595—2008规定的变压器绝缘油质量的一个常规检测项目,传统的真空差压法和二氧化碳洗脱法存在测定过程复杂、精度低、人为因素多、不便于自动化检测等缺点。笔者详细阐述了一种依据理想气体状态方程、应用差压传感器来测量和标定绝缘油中含气量的方法,并且给出了测量需要的环境温度、大气压和气体压强等测量电路。结果表明,所提供的技术原理正确,方案可行,测量精度高,操作简单,便于自动化测量。
傅中君, 洑涵妤
doaj
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, 2015 文中建立了用于高压电缆的温度在线监测的光纤传感系统,针对电缆不同部分的测量需求,采用不同的光纤传感原理分别进行了温度测量。通过模拟电缆隧道进行了有针对性的试验,试验结果表明,布里渊温度测量系统的精度可达2℃,布里渊散射频率与温度变化呈严格的线性关系;拉曼温度测量系统的精度可达0.5℃;拉曼温度测量系统适用于通过监测热点温升电缆局部缺陷;布里渊温度测量系统适用于电缆全段的温度测量,实现动态载流量;点式光纤光栅温度测量需要注意消除电缆温度变化导致形变的干扰。
王丽, 罗健斌
doaj
Functional Ecology, Volume 40, Issue 5, Page 1428-1442, May 2026.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
Shiyou jixie, 2015 直线度是机械加工中重要的测量参数，抽油杆直线度直接关系到其产品质量，但一直没有较好的测量手段。为此，提出一种基于阵列摄像的机器视觉测量方法。测量系统通过采集抽油杆的边缘轮廓图像，进行形态学的图像处理，得到一段抽油杆表面轮廓直线，通过激光线条提供直线基准，与20台相机测量的轮廓线比对，获得10 m抽油杆的全长直线度。测量系统通过旋转抽油杆，获得多个圆周方向上的直线度，其测量精度为0.5 mm/m，测量速度为2根/min，可实现非接触、高精度的快速直线度测量。
朱, 里, 康宜华, 李, 龙, 丁一鸣
doaj
Construction and verification of an intelligent measurement model for diabetic foot ulcer. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2021 Zhao N +12 more
europepmc +1 more source
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