Results 11 to 20 of about 273,818 (155)
, 2010 从复杂圆柱形振荡浮子出发,基于线性波规则理论,考虑粘性阻尼吸取波浪能,建立了振荡浮子的一维运动方程,以此推导了振荡浮子在自由漂浮运动、无阻尼运动、恒定弹簧下有阻尼运动及最优弹簧和最优阻尼下和在设定工作状态下的振动表达式,最后实例分析了振荡浮子的振动特性。研究表明振荡浮子的固有周期是随入射波频率的变化而变化 ...
吴必军, 覃岭
core +5 more sources
Rare Metals, Volume 42, Issue 1, Page 234-243, January 2023., 2023 Graphical abstract Abstract The heating and helicity effects induced by circularly polarized laser excitation are entangled in the helicity‐dependent all‐optical switching (HD‐AOS), which hinders understanding the magnetization dynamics involved. Here, applying a dual‐pump laser excitation, first with a linearly polarized (LP) laser pulse followed by a
Guan‐Qi Li +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Aiming at the problems of insufficient forming quality and poor surface performance in the preparation of Ti‐6Al‐4V alloy by laser powder bed fusion (LPBF), this study proposed a laser in situ forging additive manufacturing (LIF‐AM) technology, which integrates LPBF with femtosecond laser in situ shock forging and realizes defect control and ...
Peng He +10 more
wiley +1 more source
, 1982 随机振动作为一门学科正式出现,还是五十年代初期的事情,它是随着科学技术的发展,特别是电子计算机的广泛应用而迅速发展起来的一门新兴学科。今天,可以毫不夸张地说,在现代科学中 ...
曾春华
core +2 more sources
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Many metallic components are frequently subjected to coupled environments of friction and vibration, stemming from interfacial contact and relative motion between mating parts or external stimuli. Consequently, it is imperative for these components to exhibit a synergy of high wear resistance and superior damping properties.
Ze Pu +12 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Developing high‐efficiency catalysts for the seawater urea oxidation reaction (UOR) is pivotal to advancing hydrogen production via seawater electrolysis. Defect engineering has established itself as a core strategy for regulating catalytic activity.
Xiaoyu Wu +11 more
wiley +1 more source
, 2020 变截面梁可以简化为由多段阶梯梁所组成,简化的段数越多,结果越精确。因此,基于Timoshenko梁理论,运用连续体传递矩阵法建立阶梯梁振动微分方程,并求解阶梯梁在考虑惯性效应移动载荷作用下的受迫振动响应;改变移动载荷的质量、速度和加速度,研究移动载荷参数对惯性效应的影响。与Euler梁模型和有限元模型的对比表明,该方法精度良好。选取悬臂梁自由端端点进行分析,结果表明,移动载荷的质量、速度和加速度增大,惯性系数也增大;质量是影响惯性效应的主要因素。当移动载荷的质量很小时 ...
王禹, 李宏亮, 龚云轩, 汤占洲
core +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 1, Page 88-98, July 2026.ABSTRACT Objective To identify prenatal predictors of tuberous sclerosis complex (TSC) in fetuses with one or more cardiac rhabdomyomas (CR), evaluate an integrated multimodal diagnostic workflow using fetal magnetic resonance imaging (MRI) and trio whole‐exome sequencing (trio‐WES) and characterize perinatal outcomes.
X. Cai +8 more
wiley +1 more source
Higher Education Quarterly, Volume 80, Issue 3, July 2026.ABSTRACT Amid intensified global talent competition and domestic demographic pressures, China, Japan and South Korea (hereafter, ‘Korea’) have expanded their international student policies beyond attraction and recruitment to include stronger measures for post‐study employment and retention, repositioning international students as strategic populations
Lilan Chen, Yingxin Liu, Xin Li
wiley +1 more source
, 2008 主要基于三维弹性力学和状态空间法给出了四边简支各向同性矩形层合板自由振动和强迫振动问题的精确解.首先基于三维弹性力学建立了层合板的基本方程,利用状态空间法解决了层合板的自由振动问题 ...
杨亚政, 刘华
core +2 more sources