Results 51 to 60 of about 576,243 (160)
Jianzhu Gangjiegou Jinzhan, 2023 为分析钢底板波形钢腹板梯形组合箱梁的畸变效应，利用圣维南原理考虑顶底板对波形钢腹板的约束作用，将组合箱梁等效为钢箱梁的过程中保持面内外抗弯刚度不变，基于板元框架法建立畸变控制微分方程并导出克雷洛夫函数形式的通解。结合数值算例的对比分析验证所提方法的合理性，并研究腹板俯角和梁高变化对畸变双力矩的影响。结果表明：相较于完全忽略腹板的面内抗弯刚度，考虑顶底板对腹板的约束作用更合理；波形钢腹板和钢底板对箱梁的畸变翘曲刚度和横向框架刚度均有较大程度的削弱 ...
陈东亮, 张元海, 刘泽翔
doaj
Inverse Thermal Softening Behavior in a High‐Entropy Alloy Under Various Strain Rates
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Although face‐centered cubic high‐entropy alloys (HEAs) have received extensive attention and in‐depth research, most existing studies focus on single temperature or strain rate conditions, lacking systematic investigations into deformation mechanisms under extreme thermomechanical coupling environments.
Zhi Wang +6 more
wiley +1 more source
, 2013 本发明涉及一种反射式变形镜变焦方法及系统，方法包括以下步骤：1）根据外部变焦指令判断是否需要变焦；若是，则进行步骤2）；若否，则退出变焦过程；2）通过调整变形镜的曲率进行变焦控制；3）根据变焦时间判断变焦过程是否完成，若是，则退出焦距调整过程；若否，则继续执行步骤2）。为了解决背景技术中存在的上述技术问题，本发明提供了一种在图像采集及处理电路的基础上增加适量软件工作量以实现对变形镜的曲率和面形的控制、实现空间相机无运动部件 ...
罗明伟 +8 more
core
[Solid placental transmogrification of the lung: A case report and literature review]. [PDF]
Beijing Da Xue Xue Bao Yi Xue Ban, 2023 Ha XM, Yao YZ, Sun LH, Xin CY, Xiong Y.
europepmc +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Heterogeneous structures have demonstrated great potential for overcoming the long‐standing strength–ductility trade‐off in metallic materials. In this study, a novel dual‐gradient structure, characterized by gradients in both grain size and precipitate distribution, was successfully constructed in an Mg–2Zn–0.8Gd (wt%) alloy sheet via sliding
Chunquan Liu +4 more
wiley +1 more source
Gaoya dianqi, 2005 介绍了变压器绕组电容测试和短路阻抗试验两个判断变压器绕组变形的试验及判断方法,通过对故障变压器试验及吊罩结果的分析,证明两个方法可以与变压器绕组变形试验结合判断绕组变形程度。
罗铮
doaj
[Construction and biological characterization of a Proteus mirabilis strain with modABC gene deletion]. [PDF]
Nan Fang Yi Ke Da Xue Xue Bao, 2023 Huang Y +4 more
europepmc +1 more source
Ultrasonic Vibration Assisted Laser Processing: A Hybrid Paradigm for Extreme Surface Enhancement
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Traditional laser processing techniques offer many advantages, but they often encounter limitations such as heat‐affected zones, recast layers, residual tensile stresses, and poor surface finish. The integration of ultrasonic vibration (UV) presents a promising hybrid approach to overcome these challenges by introducing beneficial effects like
Aziz Ul Hassan Mohsan +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Carbides strengthen the grain boundaries; nevertheless, excessive carbide precipitates embrittle the grain boundaries of high‐temperature alloys during prolonged service. Here, we provide direct evidence of solute rare‐earth atoms and demonstrate that they can trap vacancies and inhibit interstitial diffusion, restraining carbide precipitation
Jiali Zhang +10 more
wiley +1 more source