Results 61 to 70 of about 16,978 (167)
Research on Predictive Maintenance Mode of Air Preheater Based on Digital Twin [PDF]
ObjectivesIn order to solve the shortcomings of the traditional preventive maintenance method of air preheater in large thermal power unit, a general mode of predictive maintenance based on digital twin was proposed, and the digital twin system of air ...
CHEN Lian +12 more
core +1 more source
Underrepresentation of bats in Africa's protected areas
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Biodiversity is severely threatened globally, with habitat loss and other human pressures accelerating species extinctions. Protected areas (PAs) are a critical conservation tool; however, their effectiveness in safeguarding many taxa, such as bats, remains unclear.
Cecilia Montauban +9 more
wiley +1 more source
Guangtongxin yanjiu, 2007 文章采用全矢量有限元法（FVFEM）对不同结构参数的光子晶体光纤（PCF）进行数值分析,得出了基模模场分布,进而计算出高非线性PCF非线性特性的两个重要的基本物理量:有效面积Aeff和非线性系数γ,并分析了Aeff和γ与PCF的结构参数空气孔直径d和空气孔间距Λ之间的关系。
吴铭, 刘海荣, 黄德修
doaj
基于多频超声波技术和GWO-BP算法的变压器油电气性能检测方法研究
Gaoya dianqi, 2020 为了实现对变压器油电气性能快速准确地检测,提出了基于多频超声波（MFU）技术和灰狼优化BP神经网络（GWO-BP）的检测方法,利用不同频率超声波在变压器油中传播速度和衰减系数不同、对不同尺寸颗粒物检测效果不同的特点,综合了超声波在无损检测上的优势以及灰狼算法全局寻优能力强、预测精度高的优点。首先利用超声波在非均匀介质中的传播特性,准确地获取超声波在变压器油中的传播速度、衰减系数等特性参数;再利用灰狼算法对传统BP神经网络进行优化。然后利用灰狼优化的神经网络对样本进行训练 ...
王旭, 生西奎, 慕锟, 王昕
doaj
Conservation Biology, Volume 40, Issue 1, February 2026.The graphical abstract highlights the research collaboration with fishers through interviews to record fishers' knowledge and participatory monitoring, to provide data on small‐scale fisheries in three clear water rivers (Trombetas, Tapajos and Tocantins).
Renato A. M. Silvano +10 more
wiley +1 more source
Numerical simulation of temperature field in surrounding rock of coal mining face based on cyclic advancement algoritm [PDF]
With the increasing depletion of shallow coal resources, deep mining has become the new normal for coal resources development. The high temperature and high humidity thermal environment in deep mines jeopardizes the health of operators, increases the ...
Fei TANG +6 more
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SWEET1‐mediated glucose transport is crucial for energy availability in Arabidopsis
New Phytologist, Volume 249, Issue 4, Page 1816-1830, February 2026.Summary The stress‐responsive hormone abscisic acid (ABA) is known for its inhibitory effects on various physiological processes, including seed germination, often resulting in energy deprivation. Interestingly, ABA‐induced germination inhibition can be alleviated by exogenous glucose (Glc), mimicking a functional interplay between ABA and sugar ...
Xueyi Xue +3 more
wiley +1 more source
初步建立武汉地区健康成人血浆Cystatin C生物参考区间
Zhongguo shiyan zhenduanxue, 2010 目的通过比较不同性别年龄人群血浆Cystatin C值的差异,尝试建立本地正常人群血浆Cystatin C的生物参考区间。方法研究对象为武汉地区480名成人健康体检者,按不同年龄性别分为四个亚组,18-50岁女性组,50岁以上女性组,18-50岁男性组,50岁以上男性组,每组各120例。采用颗粒增强散射免疫比浊法测定血浆Cystatin C含量。检测结果用SPSS软件进行数据分析。结果50岁以下成人:Cystatin C生物参考区间:0.55-0.93 mg/L,50岁以上人群:Cystatin ...
李辉军, 管青, 周丹
doaj
Simulation and Experimental Study on the Effects of Cold Air Temperature and Packaging Method on the Pre-cooling Process of Fresh Daylily [PDF]
In order to explore the effect of different cold air temperatures (1 ℃ and 4 ℃) and packing methods (parallel and perpendicular to the wind direction) on the pre-cooling efficiency of fresh daylily (Hemerocallis citrina Baroni.), computational fluid ...
Chaofan ZHANG, Jiankang CAO, Yanyan MA
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, 2013 对微重力下不变形双滴的非定常热毛细迁移运动进行了数值模拟,采用了有限差分方法对动量方程和能量方程进行离散,使用波前追踪法捕捉运动的不变形液滴界面.研究显示双滴的排列方式对它们的迁移规律和相互作用影响很大 ...
尹兆华, 常磊, 李巧红
core