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This paper reports a novel prototype of hydrogen sensing device with micro size, low power cost and low operating temperature. The sensor integrated sensing and heating function was fabricated with the process of bulk-Si MEMS. Two classic materials doped Pd, SnO2 and MnO2, were spun coating on inter-digital electrode device for detecting the hydrogen with various magnitude from 10ppm to10000ppm. Different...
A tunable interior-ridge microring filter is demonstrated with a high quality factor of 1.5×105, while achieving a thermal tuning efficiency of 5.5µW/GHz. The filter demonstrates a record low insertion-loss <0.05dB over an uncorrupted 4-THz free-spectral-range.
The paper introduces the principle of reheating furnace temperature control and expounds the necessity of billet temperature curve optimization, According to the slab billet reheating mathematical model and the various parameters, the billet temperature curve can be worked out so as to achieve the optimal optimum control.
According to the characteristics and the process conditions of continuous reheating furnace, a scheme is discussed which combines detection data belonging to pull steel rate P, discharging steel billet surface temperature and residual oxygen in flue gas with furnace combustion process control. Actual application shows that this method is feasible and significantly meaningful to reduce the loss of...
The calculations of the temperature fields, the residual stress distributions and the displacement distributions of welding process by using three-dimensional thermo-elastic-plastic FEM (finite element method) are time-consuming. Some high efficiency computational methods aiming at characteristics of welding process in welding process numerical simulation were proposed such as segmented moving heat...
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