Abstract: A LED bulb apparatus has a bulb shell, a head cap, a driver circuit and at least one light strip. The bulb shell has a light passing shell and a bottom portion. A head cap has a neck portion, a first electrode and a second electrode. The neck portion of the head cap is connected to the bottom portion of the bulb shell forming a container space. A fluorescent layer covers the multiple LED modules. The driving current is transmitted via at least one of the top end and the bottom end of the light strip to the LED modules. The substrate has a light transmittance less than 50%.

Abstract: Disclosed are a gas sampling system and a gas sampling method for a fuel cell, a current density distribution estimation method for the fuel cell, a calibration method and a calibration device for an internal state model for the fuel cell, and a computer equipment. The gas sampling method for a fuel cell includes arranging a plurality of sampling pipelines and a plurality of sampling points, the plurality of sampling points being arranged at a cathode inlet, an anode outlet, an anode inlet, a cathode outlet, and in an anode flow channel, and a cathode flow channel of the fuel cell, the sampling points arranged in the anode flow channel and the cathode flow channel being located in central regions of cross sections of the flow channels, and the sampling pipelines being connected to the plurality of sampling points, respectively, and configured to guide gas inside the fuel cell out.

Abstract: An electrical connector includes an inner shielding shell, an insulating housing, a plurality of terminals and an outer shielding shell. The inner shielding shell defines an accommodating chamber therein. The insulating housing has a base body engaged with a rear of the accommodating chamber and a tongue portion extended forward from the base portion to stretch into a front of the accommodating chamber. A ring-shaped cavity is opened in a periphery of the base body for receiving a waterproof washer therein. An outer periphery of the waterproof washer abuts against insides of the inner shielding shell. The terminals are disposed in the insulating housing. The outer shielding shell surrounds the inner shielding shell. The outer shielding shell has at least one soldering arm soldered to a printed circuit board for achieving a ground function of the inner shielding shell through the outer shielding shell.