Results 91 to 100 of about 39,766 (300)
, 1997 采用近似方法研究应力非奇异项对小范围相变条件下超临界相变陶瓷韧性增值的影响。材料相变屈服准则包含了体膨胀和剪切应变的作用。文中给出了韧性增值的估算公式。结果表明：非奇异项的影响是显著的，相变增韧值存在尺寸效应，并且相变剪切效应增强会使韧性增值有所提高 ...
叶裕恭, 张浠, 陈振富
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Despite artificial intelligence (AI) emerging as a key driver of innovation and transformation in language education, how to enhance language teachers’ AI literacy and understand their emotional experiences in AI‐mediated teaching remains largely unexplored.
Xiao Xie +3 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2009 受弯的冷弯薄壁卷边槽钢基本上有板件局部屈曲,截面畸变屈曲和构件弯扭屈曲三种屈曲模式,随后有它们之间的相关屈曲。由于畸变屈曲模式对缺陷的敏感度高,因此其屈曲后强度提高的幅度远低于局部屈曲模式。但是与局部屈曲模式相比,畸变屈曲模式抵抗破坏的能力却很强。可以用有限单元法计算受弯卷边槽钢截面的畸变屈曲强度。本文介绍了澳大利亚-新西兰标准AS/NZS4600-2005,用手算法计算受弯卷边槽钢截面的弹性畸变屈曲应力,並用直接强度法计算其相关的屈曲承载力。
陈骥
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TTF-TCNQ分子晶体的电子能带——Peierls相变前后能带结构的变化 [PDF]
, 1986 启元 张, 继民 严, 津琨 刘
openalex +1 more source
湘中山地土壤线虫(Nematoda)生态地理群的研究 [PDF]
, 1992 作者对湖南南岳衡山和长沙岳麓山土壤线虫进行了两年多的定位研究,共获得18511条土壤线虫标本.经分类鉴定,计有24个种 ...
伍惠生, 张友梅, 王振中
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Materials Genome Initiative and Nuclear Fuel Element Material [PDF]
, 2017 核能由于其高能量密度和低污染排放等优点,已经成为未来能源的重要组成部分。然而,民用核燃料材料因其特殊的放射性,实验研究的安全防护成本极高,尤其是; 经过辐照后的核燃料材料,分析和表征手段极其有限,如果采用传统的试错法材料研发方法,将会使材料的研发成本大幅提高,因此,材料基因工程的研究思路正是; 适合于新型民用核燃料材料研究的技术路线。本研究组多年来以开发新型民用核燃料元件材料为目标,通过第一性原理和CALPHAD技术的结合,先后建立了U; 、Pu等锕系元素的多组元热力学数据库 ...
刘兴军 +4 more
core +1 more source
Policy Studies Journal, EarlyView.Abstract Despite the reality that advocates frequently expend significant resources to pass symbolic policies, this policy design has often been neglected by policy studies scholarship. We combine policy design and policy feedback theory to examine this oft overlooked policy design in practice using the case of California's human right to water law ...
Jenny Linder Rempel +1 more
wiley +1 more source
Mobilizing fears? How proximity to deportation threat affects political participation
Policy Studies Journal, EarlyView.Abstract Policies often provoke political changes, which are collectively known as feedback effects. Studying state variation in immigration policy, scholars have shown that proximity to hostile policy tends to mobilize Latinos. But not every member of the Latino community is likely to perceive the same proximity to anti‐immigrant policies.
Mackenzie Israel‐Trummel +2 more
wiley +1 more source
Guangtongxin yanjiu, 2019 为了提高采用有限元分析平面光波导热应力的精度和效率,提出了一种改进平面应变模型。通过将材料的热膨胀系数正交各向异性化,材料垂直于波导传播方向的热膨胀系数为真实的热膨胀系数,但沿波导传播方向的热膨胀系数经过适当的变换可满足变形协调和适应平面应变模型,采用改进的平面应变模型,计算了平面光波导的热应力。计算结果表明,与广义平面应变模型相比,用改进的平面应变模型得到的应力的最大误差只有0.4%,而计算时间缩短为广义平面应变模型的12.6%,与平面应变模型相比,改进平面应变模型的计算时间相等,而计算精度大幅提高。
李长安, 全本庆, 关卫林, 江毅
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