Results 91 to 100 of about 30,971 (191)

The Research of Sea Wave Overflow Forecast along Fujian Coast [PDF]

, 2016
本文利用第三代海浪模式SWAN基于非结构三角形网格和矩形网格分别对1319号“天兔”、1323号“菲特”两场台风影响下的福建沿岸有效波高进行了数值模拟。其中，福建中部A海堤的三角形网格模拟的平均绝对误差分别为0.15m、0.16m，而矩形网格的平均绝对误差分别为0.23m、0.22m；三角形网格模拟的均方根误差分别为0.19m、0.20m，而矩形网格的均方根误差分别为0.26m、0.28m，说明两种网格的模拟值与实测值较吻合。然而三角形网格的模拟效果更好一些。这说明 ...
张敬
core  

Overreliance on Orthographic Similarity in L2‐Japanese Conceptual Processing by L1‐Chinese Learners

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Orthographic and phonological similarities between first (L1) and second (L2) languages can facilitate L2 processing. Particularly, L1‐Chinese learners of L2‐Japanese can benefit from the shared morphosyllabic Chinese characters (Japanese kanji/Chinese hanzi) because of their similar orthographies.
Xuehan Zhao, Kexin Xiong, Sachiko Kiyama
wiley   +1 more source

大型重载齿轮渗碳淬火的变形

Jixie chuandong, 1993
作者收集和测量了大量的大型重载齿轮在渗碳淬火后发生的变形,通过统计分析和实验,摸索到大型重载齿轮渗碳淬火后产生变形的规律性,并对变形原因进行分析和讨论,提出了在冷却过程中相变的不均匀性和不同步性带来的影响。文章以矿井行星减速器齿轮为例,针对变形原因,提出了减少大型重载齿轮渗碳淬火变形的若干工艺措施,在实践中已经得到效果。
仲复欣, 朱建海
doaj  

Simulation Analysis and Optimization of Coach Seat and Passenger Coupling Impact System [PDF]

, 2015
据相关资料表明，在客车碰撞所造成的人员伤亡中，因乘员与座椅之间的二次碰撞或座椅与车体相连部位的失效占了相当大的比例。为了提高我国客车在碰撞事故中对乘员的保护能力，客车座椅及其固定点强度的国家标准GB13057-2014目前已从推荐性标准升级为强制性实施标准。为了保证所设计的座椅能满足新法规要求，必须深入研究客车座椅及其固定支架的结构变形及乘员在碰撞过程中的伤害情况。 汽车碰撞过程是一个瞬间的复杂的物理变形过程，它包含了几何非线性，材料弹塑性变形非线性和零部件间复杂的接触非线性等特征 ...
卢琳兆
core  

Reconceptualising Motivation as Material‐Semiotic Entanglements: Translanguaging in Graduate TESOL Education

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Multilingual students in Anglophone universities often operate in survival mode. While translanguaging supports learning, critical gaps remain in understanding how translanguaging pedagogies transform and sustain motivation in English‐dominant contexts.
Melissa Jufenna Slamet, Julie Choi
wiley   +1 more source

变内力杆件平面外计算长度系数的研究

Jianzhu Gangjiegou Jinzhan, 2009
工字形和T形截面的变内力杆件在桁架中经常出现,如何确定其平面外的计算长度系数,现行规范中无明文规定。因此分析和研究变内力杆件的平面外计算长度系数,具有重要的工程意义。本文利用ANSYS对工字形和T形截面变内力杆件的计算长度系数进行了分析,研究表明:采用工字形和T形截面时变内力杆件的计算长度系数μy几乎相等,可以利用μy计算T形截面变内力杆件的μyz;根据计算长度系数μy随参数η和ξ的变化趋势,拟合得出简化计算公式,并提出了考虑扭转效应的μyz的计算公式。
栗增欣, 郭成喜, 赵振佳, 付占明   +3 more
doaj  

Powerful representation of the poor? German welfare associations' narrative advocacy during COVID‐19

Policy Studies Journal, EarlyView.
Abstract The COVID‐19 pandemic sparked unprecedented experimentation in the German social assistance system, leading to changes previously considered impracticable by policymakers. This included a sanctions moratorium, easier access to benefits, and temporary cash transfers, all of which were advocated by welfare associations—key organized interests ...
Christopher Smith Ochoa
wiley   +1 more source

封隔器胶筒轴向压缩大变形与双重接触力学分析

Shiyou jixie, 2014
压缩式封隔器胶筒属大变形材料，在坐封过程中与中心管、套管产生双向接触摩擦，给理论分析带来难度。鉴于此，考虑胶筒材料非线性、几何非线性及双重接触非线性，采用弹性力学理论和橡胶大变形本构关系，推导了胶筒坐封过程中的变形和接触压力计算公式，根据力学基本理论建立胶筒变形方程。将胶筒变形分为自由变形、单向约束变形和双向约束变形3个阶段，利用载荷迭代法求解各阶段的接触压力和压缩量。提出以密封系数作为封隔器坐封的判别条件，密封系数越大，表明密封性能越好；通过密封系数不小于1来判断封隔器是否完全坐封 ...
刘巨保, 党黎明, 付茂青, 王泉
doaj  

Transition metal compounds and alloys: A first-principles investigation [PDF]

, 2015
含过渡金属的化合物与合金在数据存储、光催化和能量存储与转换等领域有重要的应用，主要得益于其特定的电子结构、力学性能等性质。本论文利用基于密度泛函理论的第一性原理计算方法，选取特定的研究体系，系统地探索了过渡金属化合物与合金的电子结构（第三章）、内部原子扩散（第四章）、力学性能（第五章）以及压力与温度对其性质的影响（第六章）。 为了研究缺陷和掺杂对过渡金属氧化物电子结构的调制，我们以SrZrO3为研究对象，首先研究了内部含有有序氧空位和部分无序氧空位体系的电子结构。计算结果表明 ...
郭忠路
core  

Moralization in Policy Narratives: Insights From the Politics of Climate Change and Public Health

Policy Studies Journal, EarlyView.
ABSTRACT In this study, we examine the process of moralization—defined as the use of moral values to mobilize support for or against policy proposals. Specifically, we investigate how political parties strategically employ moralization to influence policy processes, varying their approach depending on their political ideology and institutional position.
Simon Schaub, Jale Tosun, Maria Becker
wiley   +1 more source