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The analog fiber-optic link for Shanghai 65m radio telescope comprise PSI-1602 broadband microwave photonic link and 500 meters Corning optical cable. Performance measurement of the analog fiber-optic link is discussed. First, explained the measurement principles and methods of the PSI-1602 broadband microwave photonic link. Then, elaborated the group delay temperature coefficient measurement of Corning...
This paper investigates the voltage hysteresis effect and residual birefringence in the polymer-stabilized blue phase I and II, under various phase separation conditions. By irradiating samples with ultraviolet (UV) light and curing the samples at a reduced temperature, the polymer in the blue phase formed a compact network along the direction of the UV light irradiation. The dense polymer network...
This investigation presents a novel flexible measurement device for use in proton exchange membrane fuel cells (PEMFCs). This device can measure temperature and the humidity distribution with in a PEMFC. This device has three pieces, each with several sensors, installed in the upstream, midstream and downstream parts of a PEMFC. These sensors are inserted separately above the flow channels. When the...
Fuel cells will be applied extensively in the future as renewable energy sources, explaining why a considerable amount of research has addressed this topic. However, among the various problems encountered in the mass production of fuel cells that have yet to be solved include those associated with the bipolar plate, flow channel, catalyst, membrane electrode assembly (MEA), gas diffusion layer (GDL)...
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