Articles techniques et présentations

Foam, as the internal filling material for headphone ear cushion, has a significant influence on user experience (UX) as well as the acoustic performance (PNC & FR) of headphones. Selecting the appropriate foam in practical product development is therefore critical, and a thorough ... En savoir plus

Silicon photonic devices feature a high degree of integration and strong optical field confinement. However, the temperature rise induced by local optical absorption can lead to variations in the material refractive index, thereby affecting the optical resonance characteristics and mode ... En savoir plus

The risk of thermal runaway highlights the critical need for efficient liquid cooling in lithium-ion batteries. This study employs COMSOL Multiphysics® to perform topology optimization of cooling channels within a battery cold plate. Using the density method, we couple turbulent flow and ... En savoir plus

Efficient operations of hot-electron photodetectors (HE PDs) require strong energy deposition in metals assisted by device-dependent optical resonances whose spectral properties are fundamental to electrical performances, particularly in terms of the linewidths of responsivity spectra. ... En savoir plus

Direct wafer bonding is a key process for advanced 3D integration, in which the propagation of the bonding front strongly influences bonding efficiency and process stability [1]. Bonding wave velocity is governed by the coupled effects of wafer deformation, interfacial fluid transport, ... En savoir plus

While personal audio devices are popular among cyclists, conventional earbuds attenuate ambient traffic sounds and compromise situational awareness. Handlebar-mounted speakers provide an open-ear alternative, but designing such devices requires resolving severe vibro-acoustic trade-offs: ... En savoir plus

随着扩展现实（XR）技术的快速发展，XR 眼镜作为可穿戴设备的重要形态，其佩戴舒适性日益成为影响用户体验和产品竞争力的关键因素。夹持力作为镜腿与头部相互挤压产生的作用力，直接关系到佩戴的稳定性与舒适性；通常来说，数值过大易引起头部压迫感和长时间佩戴疲劳，过小则可能引起眼镜滑落和定位问题。本文针对XR眼镜的夹持力问题，采用 COMSOL Multiphysics 结构力学模块建立简化的人头眼镜耦合模型：将人头简化提取为鼻梁处支撑、耳朵侧面支撑和耳朵平面支撑，镜腿、镜框和镜片简化为可变形结构，通过接触对定义镜腿与头部的边界，参考案例ID31001和ID78101 ... En savoir plus

本研究提供一种检测样品内部贋磁场以及电场效应的Ramsey装置，该装置涉及均匀主磁场、射频突变磁场、射频放大单元、10-20KV高压源、铜电极以及PFA样品等。在研究的初期通过Comsol进行了电磁模块的搭建，对产生的磁场数据进行Bloch Solver的计算，模拟极化中子的翻转状态。Comsol的仿真以及实际模型搭建是通过水平放置的上下两块DT4铁板的两侧加装永磁铁产生的均匀磁场，并与射频放大单元产生的交变磁场耦合可以对单波长（4Å ）的极化中子进行自旋态的翻转，并利用该性能检测中间自由演化区加入样品后的相位变化，以此得到样品内部贋磁场以及电场效应。 En savoir plus