The design of reaction system is vital to ensure quality and reliability for electromagnetic relay (EMR). However, it is difficult to get perfect results using traditional design method, which costs ...excessive computation time. Thus the inverse design method is developed in this paper. Corresponding reduction equations, flexibility equations and dimension chain equations are established. Meanwhile dynamic specifications and stress intensity are checked. Experiment results verified the validity of the method. This inverse method can greatly improve the design efficiency and can be extended to similar structures.
Contact resistance is an important parameter that directly reflects relay performance and it is also a basic datum to evaluate relay reliability. Based on theories of electromagnetic field, kinetics, ...contact force and electric contact, a full simulation analysis scheme of relay dynamic characteristics was presented by using the method of coupling finite element analysis and kinetic computation in the paper. Contact resistance dynamic characteristics of pick-up and drop-out process were also obtained. For the break-off contact, it was found that the break-off speed was fast during the pick-up process, but there was contact bounce during the drop-out process. For the close-up contact, its stabilization time was long during both the pick-up and drop-out process, so it would affect the electrical contact performance and lifetime of the relay. In addition, the change rate of the contact resistance was large during the operating moment, thus it would affect the performance of conterminous electric circuit.
To facilitate further investigation of the function of greater epithelial ridge (GER) and lesser epithelial ridge (LER) cells, a greater a lesser epithelial ridge cell immortal line originated from ...postnatal rat cochleae were established.
The GER and LER cells were dissected from P1 rats cochleae and infected with SV40-LT antigen using a retrovirus-mediated method. The established cell lines were purified by monoclone technique and identified following morphology observation and immunocytochemical staining.
The established cell lines had been stably maintained continuously for more than 20 passages and displayed many features similar to epithelial cells. They grew in patches and assumed a polygonal morphology. Immunocytochemical characterization revealed that these cells could be labeled by GER/LER marker (Isletl) and SV40-LT antigen.
In the present experiment, the GER and LER cell line from postnatal rat cochleae has been successfully established and this cell line may potentially provide an invaluable syste
