Results 81 to 90 of about 490,447 (173)
Gaoya dianqi, 2022 输变电设备运行状态评估是电网企业技术管理的重要内容，针对目前电力变压器健康状态评估模型中存在的对状态量单一赋权不合理、实现步骤较为繁琐、算法性能不稳定等问题，文中采用加权秩和比WRSR(weighted rank sum ratio)模型对电力变压器健康状态进行评估，该模型原理简单，易于实现。通过选取电力变压器运行中典型状态量，采用组合赋权的理论对各状态量赋予权值大小，进而计算评估对象的加权秩和比。利用加权秩和比确定待评估对象的概率单位，并将概率单位作为自变量代入回归方程中得到状态评估结果 ...
咸日常 +5 more
doaj
, 2007 本文按照现有生物质能利用技术的发展情况将其分为产业化技术、示范技术和前沿技术，对各类技术的原理、特点、发展现状等进行了分析研究，在此基础上分析得出各种技术的发展趋势和前景 ...
周肇秋 +3 more
core
Power Leveraging: The Everyday Expansion of the Grassroots State in Urban China
Law &Policy, Volume 48, Issue 4, October 2026.ABSTRACT China has witnessed a notable expansion of state power during and after the pandemic, particularly at the grassroots level. How has this occurred? The Shequ, a grassroots state agent, has played a central role, taking on extensive administrative responsibilities aimed at enhancing social management, often at the expense of rule‐of‐law ...
Aokai Yang
wiley +1 more source
, 1998 本文从Ｎ４００的研究方法、基本理论、影响因素、研究与争论的问题等方面，介绍了采用语言文字作为刺激材料的事件相关电位研究现状，并比较了中、西文的研究差距 ...
罗跃嘉, 魏景汉
core +1 more source
Zhongguo shiyan zhenduanxue, 2011 帕金森病（PD）是一种进行性的神经系统变性疾病。PD的病理改变不局限于黑质纹状体多巴胺能系统,研究发现在PD患者和动物也有边缘系统形态或（和）功能的变化。在PD病人中有40%存在抑郁症状,这种抑郁症状可早于运动症状出现[1]。位于背侧间脑的外侧缰核（LHb ...
阮孝国, 麻海春
doaj
Predictive evolutionary genomics: principles, validation, and practice
New Phytologist, Volume 252, Issue 1, Page 36-48, October 2026.Summary Climate change and habitat loss are driving rapid evolutionary responses in populations world‐wide, which creates an urgent need for evolutionary forecasting in conservation and agriculture. Such forecasting can be categorized into three time scales: trait‐based models that use multivariate quantitative genetic equations to project correlated ...
Daniel Ortiz‐Barrientos +5 more
wiley +1 more source
基于ACR TI-RADS分类对甲状腺乳头状癌淋巴结转移风险模型的预测
Zhongshan Daxue xuebao. Yixue kexue ban, 2018 【目的】应用美国放射学会（ACR）甲状腺影像报告及数据系统（ACRTI-RADS2017）对甲状腺乳头 状癌患者转移风险进行评估，提高超声对甲状腺转移癌检出率。【方法】回顾分析经病理确诊的甲状腺乳头状癌 163例，根据术后N分期分为转移与非转移2组，对照临床和病理特征，对ACRTI-RADS评分与甲状腺乳头状癌 患者发生淋巴结转移的关系进行单因素和多因素分析。【结果】发生淋巴结转移患者TI-RADS评分为12.0 （10.0，14.0），高于未发生转移的患者（P＝0.003 ...
何学森 +3 more
doaj
Neutral interactions among non‐native plants are common
New Phytologist, Volume 252, Issue 1, Page 292-309, October 2026.Global distribution of studies and overall effect of co‐invasion for all metrics of non‐native plant performance combined. Summary Globalization has accelerated the establishment of non‐native plant species, increasing the prevalence of multispecies co‐invasions; yet interactions among co‐invaders remain poorly understood.
Feng He +7 more
wiley +1 more source
Gaoya dianqi, 2011 介绍了750 kV CVT中间变压器现场介损试验的现场测试情况,分析了试验数据超标的原因及按照规程中规定的介损标准进行设备绝缘状态判定的难度,并提出了下一步如何在现场进行交接试验判断CVT电磁单元绝缘状况的建议。
毛琛琳, 张四江, 谭彦民
doaj