Results 31 to 40 of about 6,923 (169)
International Journal of Applied Linguistics, Volume 35, Issue 1, Page 274-290, February 2025.Abstract Metacognitive regulation refers to learners’ ability to use a repertoire of metacognitive strategies to guide, observe, and manage thoughts, actions, and emotions in learning activities. It has been widely acknowledged as a significant predictor of language learning success, including writing.
Wandong Xu, Xinhua Zhu
wiley +1 more source
Qtech-413 粘弹阻尼材料在盾构隧道中减振性能研究 [PDF]
, 2016 根据盾构隧道的结构特点,用Qtech-413 粘弹阻尼材料对盾构管片标准块进行约束阻尼处理,通过单点锤击振动实验,得到处理前后结构的时域波形、固有频率、复合损耗因子等振动特性。实验结果显示:经过约束阻尼处理后,盾构管片振动加速度幅值降低了26.7%,振动时长降低了50%;各阶固有频率均有所降低,且随着频率的增加,降幅逐渐增加;各阶复合损耗因子均有所升高,高频增幅比低频增幅更大;振动总级值降低了10 dB 左右。因此,Qtech-413 粘弹阻尼材料应用于盾构隧道能降低振动加速度幅值、振动时间 ...
黄舰 +1 more
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Equine Veterinary Journal, Volume 57, Issue 1, Page 87-100, January 2025.Abstract Background Radiological findings in the proximal sesamoid bones (sesamoids) are a persistent source of controversy at Thoroughbred sales, due to inconsistent classification and conflicting assignment of potential clinical importance. Objectives To define the prevalence of sesamoid findings on sales repository radiographs in yearling and 2‐year‐
Frances J. Peat +5 more
wiley +1 more source
A New Finite Element Formulation for Superconvergent Eigenvalue Computation of Wave Equations [PDF]
, 2016 有限元方法是目前结构分析领域应用最为广泛的一种数值方法。自振频率计算作为结构分析中的一个重要内容，可归结为典型的特征值问题，例如：一维波动方程可描述杆结构振动，其特征值为杆结构自振频率；二维波动方程可描述膜结构振动，相应的特征值为膜结构自振频率；三维波动方程可描述声压在空间中的传播，其特征值为声压的振动频率。采用有限元法求解波动方程特征值问题时，质量矩阵的构造方法会直接影响振动频率的计算精度。因而，如何构造可使自振频率有更高收敛阶次及精度的高阶质量矩阵具有重要的研究价值。然而 ...
李希伟
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Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 6, Page 808-817, December 2024.ABSTRACT Objectives The primary aim was to validate the International Ovarian Tumor Analysis (IOTA) benign simple descriptors (BDs) followed by the Assessment of Different NEoplasias in the adneXa (ADNEX) model, if BDs cannot be applied, in a two‐step strategy to classify adnexal masses identified during pregnancy. The secondary aim was to describe the
J. Barcroft +8 more
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Studies on optical properties of tip-enhanced Raman/fluorescence system [PDF]
, 2015 针尖增强拉曼光谱（Tip-enhancedRamanspectroscopy，TERS）和针尖增强荧光（Tip-enhancedfluorescence，TEF）具有极高的检测灵敏度和空间分辨率，已经成为表面科学研究中强大的表征手段。尽管TERS及TEF在近年取得了重大的进步，但依然存在许多重大的科学问题尚待解决。如TERS实验中实现的亚纳米空间分辨理论机制已不能用常规的局域电场增强理论来加以解释;进展迅速的STM-TERS技术受到样品和基底导电的严重限制而急需发展普适性更广泛的针尖增强拉曼体系 ...
孟令雁
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Conservation Biology, Volume 38, Issue 6, December 2024.Abstract Biodiversity research is essential for addressing the global biodiversity crisis, necessitating diverse participation and perspectives of researchers from a wide range of backgrounds. However, conservation faces a significant inclusivity problem because local expertise from biodiversity‐rich but economically disadvantaged regions is often ...
Jose Valdez +8 more
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Petrov-Galerkin Finite Element Methods for Singularly Perturbed Convection-Diffusion Problems with Non-Smooth Data [PDF]
, 2005 摘要奇异摄动问题广泛存在于物理、力学和工程技术等科学领域，其中奇异摄动对流－扩散问题一直是个热门的研究课题，获得了很多关注[30],[31]。本文所讨论的是奇异摄动对流－扩散问题中特殊的一类，即带有不光滑数据的奇异摄动对流－扩散方程。文中分别对对流－扩散常微分方程和时间相关的对流－扩散偏微分方程两种情况进行了讨论。这类奇异摄动对流－扩散问题的特殊性在于方程中对流项的系数是不连续的，在不连续点的左边是负的，右边是正的。因此方程的精确解会在点的附近产生一个内部层，当时，方程的解在这个区域内有急剧的变化 ...
郑婷婷
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Study on mechanism and prediction of bank collapse of complex terrace bank slope in southwest China: A case study of front bank collapse in Cizhong [PDF]
Taking the bank collapse in front of the Cizhong resettlement site of the Wunonglong Hydropower Station on the Lancang River as an example, this study analyzed the bank collapse mode and,causative mechanisms, predicted the width and elevation of the bank
Guanghong JU +5 more
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World Medical &Health Policy, Volume 16, Issue 3, Page 316-342, September 2024.Abstract Prior research in health equity, including food security, indicates that disadvantaged groups, such as women with limited resources, face many obstacles in achieving food security. One of the first of its kind to draw on intersectionality and the social determinants of health frameworks, this study identified and tested gender differences in ...
Farzaneh Barak +2 more
wiley +1 more source