Results 31 to 40 of about 31,869 (191)
, 2017 本文根据岩心观察、薄片鉴定、测井资料等，分析了海拉尔盆地贝中地区南一段富含火山物质储层非均质性，并对储层宏观非均质性和微观非均质性分别展开研究。结果表明，贝中地区南一段储层整体非均质性较强，其中南一段I~III油组非均质性中等，Ⅳ油组非均质性最强。宏观上，南一段各小层内砂体在平面上分布极为不均，储层参数在纵向上呈韵律性变化，自下而上单层平均砂厚有变薄的趋势，隔层发育及其分布具有较强的差异性，且南一段砂岩在平面上砂厚分布不均，孔、渗变化较大，具有较强的平面非均质性。微观上，南一段储层孔隙以次生溶孔为主 ...
徐苗苗 +4 more
semanticscholar +1 more source
Finding floral and faunal species richness optima among active fire regimes
Conservation Biology, EarlyView.Abstract Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical‐centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity.
Zachary L. Steel +8 more
wiley +1 more source
Improvements for better scaling of locally managed marine areas
Conservation Biology, EarlyView.Abstract To protect and restore ecosystems at the speed and scale required to meet current environmental challenges, a greater understanding of how conservation initiatives spread from existing to new adopters is required. According to the diffusion of innovation theory, positive adopter‐to‐peer communication is a powerful driver of innovation spread ...
Emily Lewis‐Brown +6 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2012 运用Copula模型研究随机变量间的相关结构，是近年来金融统计分析中的一个热点.在龚金国和史代敏提出时变Copula非参数模型的基础上，利用时间序列的极限理论研究了时变参数估计量的大样本性质，并给出了时变Copula模型的非参数估计算法.研究结果表明，时变Copula非参数模型的时变参数估计量具有一致性和渐近正态性.
GONGJin-guo(龚金国) +1 more
doaj +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT Despite the efforts devoted to improving L2 writing pedagogy to promote student writing development, students’ dissatisfactory writing development and outcomes are still reported. Investigating student learning preparedness to navigate L2 writing curriculum transitions may generate new understandings and provide an alternative explanation for ...
Yu Zhou, Shulin Yu
wiley +1 more source
A Systematic Review of Family Language Policy Studies From 2008 to 2024
International Journal of Applied Linguistics, EarlyView.ABSTRACT As an interdisciplinary field involving language policy, language socialization, and literacy studies, family language policy (FLP) has received growing research attention. This study synthesized the major theoretical perspectives and methodological characteristics of FLP empirical research and the range of research foci and highlighted ...
Michelle Mingyue Gu +3 more
wiley +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT This paper examines the features of metadiscourse across different teacher moves in university linguistics classroom discourse and the teaching strategies reflected in its use. The results reveal that teachers employ diverse metadiscourse during classroom interactions to support student reasoning.
Jingjie Li, Wenjie Hu
wiley +1 more source
Journal of Linguistic Anthropology, EarlyView.Abstract This article argues that social actors' media ideologies about digital interfaces are key to the enregisterment of online activities. Focusing on an online register emergent from user activities around Year, Hare, Affair (YHA)—a state‐aligned Chinese animation—I explore how different metadiscourses evaluate this register by entextualizing ...
Jiarui Sun
wiley +1 more source
Guangtongxin yanjiu, 2012 为了研究填充介质对脊波导截止特性的影响,文章采用FDTD（时域有限差分）法计算了填充介质梯形双脊波导在TE（横电波）模式下的截止特性随几何尺寸的变化,并给出了关系曲线。结果表明,脊间距越小,填充介质的相对介电常数越大,截止波长越长,单模带宽越窄。研究结果丰富了现存填充介质波导数据,有助于填充介质波导的设计和工程应用。
高原, 陈小强, 李建兵
doaj
He jishu为研究压水堆一回路堆芯污垢中放射性物质的产量和分布情况，以典型压水堆（Pressurized Water Reactor，PWR）一回路为研究对象，针对一回路中的放射性物质，建立了污垢沉积及放射性物质的产量分布预测模型。模型对污垢沉积和放射性物质的预测结果与污垢仿真程序CRUDSIM（Chalk River Unidentified Deposits SIMulation）的计算结果差异小于5%。在此基础上，分析了冷却剂流速、氢气含量和冷却剂入口温度的影响。结果表明 ...
王 世伟 +3 more
doaj +1 more source