Results 101 to 110 of about 28,261 (190)
Prior Cognitive Task Analysis of Test Item Difficulty [PDF]
The pass rate of a test item often serves as an index of its difficulty. This posterior index, though easy to obtain and definite, is susceptible to students' learning level. It cannot play a leading role in designing test items.
Shao, Z. F., Yu, L.
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ABSTRACT Water security in tropical regions faces escalating pressures from climate change, land‐use shifts, and population growth. We conducted a bibliometric review of 1146 peer‐reviewed articles (1964–2023) on tropical water security. Latent Dirichlet Allocation identified 13 thematic topics and their evolution. Publications rose sharply after 2012,
Karling Fernanda Schuster +3 more
wiley +1 more source
Politically Connected Independent Directors: Grabbing Hand or Helping Hand? [PDF]
中国的独立董事们始终是一群尴尬又特殊、多遭质疑又备受瞩目的人。他们在赞誉中诞生,却在质疑中生存;他们头戴“独立”、“专业”的光环,却被冠以“花瓶”、“橡皮图章”的帽子,面临“不廉”、“不勤”、“不独”、“不懂”等诸多质疑。2013年10月19日中组部发布《关于进一步规范党政领导干部在企业兼职(任职)问题的意见》(简称“18号文”)以来,官员独董的辞职潮则把退休或在任官员在上市公司担任独立董事的“政商旋转门”现象推到了媒体的聚光灯下,在中央政府强力反腐的大背景下成为了社会热议的话题。那么 ...
谢达熙
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ABSTRACT Urban expansion significantly impacts flood risk, particularly in rapidly growing areas where impervious surfaces exacerbate surface runoff. This study examines spatial patterns of urban growth and their effects on flood exposure in Mecklenburg County, North Carolina, from 2011 to 2021.
Pegah Madadi, Azad Sadeghi
wiley +1 more source
文中以一种新型变压器绕组检测方法——扫频阻抗法为理论依据,建立了试验室测试系统,并利用该系统对单相双绕组变压器进行了测试。其结果表明:扫频阻抗法能够有效反映变压器绕组分布式参数,且其测试结果在频率大于11.5 k Hz时与频响曲线呈现轴对称关系;短路故障会造成50 Hz处阻抗值与相关系数皆发生变化,且故障越严重,阻抗值与相关系数的变化越明显。
孙翔 +5 more
doaj
Test-Retest Reliability and Its Computation of Resting State Functional Magnetic Resonance Imaging [PDF]
功能连接组(Functionalconnectomes)即人脑内部功能连接的全体。目前功能连接组指标已成为人脑功能研究中的重要参考依据。在人脑发育和疾病研究中出现了越来越多的方法用于关注脑功能的变化。由于具有不受任务设计限制的优势,因此静息态功能磁共振(rfMRI)成为人脑功能连接组学研究的主要方法之一。静息态功能磁共振图像的计算指标主要包括功能分化和功能整合两部分。鉴于开发具备高重复性的脑功能连接组学计算方法对研发基于脑成像的人脑功能影像学标记物重要性 ...
陈兵
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Abstract Exploring heat tolerance and acclimation capacity can provide an effective approach to evaluating species’ sensitivity to extremely high temperatures due to climate warming. Despite some work on amphibian and reptile thermophysiological adaptation, related questions remain. We reviewed the literature to provide a synthesis of worldwide data on
Zijian Sun +8 more
wiley +1 more source
An empirical study on the effect of internal marketing on frontline service employees' performance [PDF]
2008-2009 > Academic research: refereed > Publication in refereed journalVersion of ...
Cong, Q, Wang, YM, Yan, H
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Contribution of microcosm experiments to conservation science
Abstract Microcosms, or miniature experimental systems, have been used to develop models and theories in ecology. However, their contribution to conservation science is unclear. We explored the application, design, and impact of microcosms in conservation science from 469 systematically identified articles published from 1986 to 2023.
Eleanor R. Stern +3 more
wiley +1 more source
针对湖北通城花岗岩崩岗区发育的淋溶层(A层)、淀积层(B层)、过渡层(BC层)以及母质层(C层),采用不同坡度(8.8%,17.6%,26.8%,36.4%,46.6%)和不同流量(0.2,1.0 L/s)相结合的室内放水冲刷试验,分析崩岗各层次土壤的抗冲性指数,初步探讨花岗岩崩岗不同坡度及各层次土壤主要理化性质对抗冲性的影响。结果表明:⑴湖北通城县崩岗土壤A层、B层、BC层以及C层的理化性质存在较大差异。⑵当流量一定时,随着坡度的增大,土壤的抗冲性指数均表现为减小的趋势;当坡度一定时 ...
徐加盼 +5 more
doaj

