Ferromagnetic micro-columns (FMCs) have been fabricated on glass substrates using standard photolithography and electroplating and then integrated in micro-fluidic channels in order to study the response of super-paramagnetic beads suspended in an aqueous solution. We observed that under low external magnetic fields, the integrated micro-columns could generate sufficiently strong magnetic field gradients to trap super-paramagnetic beads in a flowing stream of water. The trapping behavior of the integrated FMCs was studied by considering different micro-patterns and different magnetic field intensities. In addition, the formation of magnetic micro-beads chains has been observed due to the magnetic dipole interactions. We believe that the integration of ferromagnetic micro-columns in microfluidic channels can have a variety of advanced applications, considering different possibilities of surface functionalization and manipulation of super-paramagnetic beads in an aqueous solution.

介绍了一种运用多体动力学进行机械系统仿真的新方法——矢量网络法，包括建模方法和其常规公式化的解题程序。结合具体实例编写了仿真程序并进行了结果分析。说明了矢量网络法应用性强的优点。

阐述了矢量网络模型的建立过程。采用矢量网络法建立了摆锤式汽车碰撞试验台的数学模型及仿真程序，仿真结果表明，矢量网络法是研究动态机械系统仿真的有效方法。