Abstract: A dual-mode combined control method for a multi-inverter system based on a double split transformer is provided. For an extremely-weak grid, the method provides the dual-mode combined control method for a multi-inverter system based on a double split transformer. According to the method, the equivalent grid impedance at a point of common coupling (PCC) of one grid-connected inverter (GCI) in the multi-inverter system based on the double split transformer is obtained with a grid impedance identification algorithm, and the system sequentially operates in a full current source mode, a hybrid mode, and a full voltage source mode according to a gradually increasing equivalent grid impedance, thereby effectively improving the stability of the multi-inverter system based on the double split transformer during variation of the strength of the grid. The method ensures that the system can still operate stably in the extremely-weak grid.

Abstract: A real-time double-beam in situ infrared spectrum system and a method thereof. The system comprises two identical infrared spectrometers and a double-beam infrared reactor cell, wherein the double-beam infrared reactor cell is formed by connecting a sample cell and a reference cell which are identical, the sample cell and the reference cell are at the same level and respectively correspond to a sample spectrometer and a reference spectrometer, the two infrared spectrometers are synchronously controlled by computers, to synchronously collect spectrograms of sample beams and background beams in real time, so as to obtain real information about a species on the catalyst surface changing with the reaction time, and eliminate gas molecule vibration spectrum interference in a real-time state and transmission spectrum interference generated under a heating condition.

Abstract: This disclosure relates to a soldering system containing a soldering apparatus and a heating apparatus. The soldering apparatus includes a heating plate having a body defining a plurality of first air exits, each first air exit extending through the body of the heating plate and the heating plate being configured to supply hot air through the first air exits; a cover disposed on the heating plate, the cover and the heating plate defining a hot air chamber; a plurality of axially movable positioning shafts extending though the body of the heating plate, in which each shaft has a first end and a second end, the first end is in the hot air chamber, and the second end is outside the hot air chamber; and a conduit attached to the cover, the conduit being configured to supply hot air to the hot air chamber.

Abstract: A method for increasing the yield of total flavonoids in Ganoderma lucidum mycelium by an expansin comprises: (1) inoculating Ganoderma lucidum into the PD liquid fermentation medium, activating the culturing of the strains and obtaining a seed solution; (2) inoculating the seed solution into a liquid fermentation medium, culturing and adding the expansin solution, then further culturing, isolating and obtaining Ganoderma lucidum mycelium; (3) extracting flavonoids from the Ganoderma lucidum mycelium and obtaining total flavonoids. A plant expansin is used for the liquid fermentation production of flavonoids ingredients of Ganoderma lucidum, and the fermentation process and extraction method are optimized to increase greatly the yield of total flavonoids in Ganoderma lucidum.

Abstract: A solar cell (100) includes a photoelectric conversion layer (120) having a front surface (121) and a back surface (123), a back electrode (110) disposed on the back surface (123) of the photoelectric conversion layer (120), a plurality of electrically conductive fingers (130) disposed on the front surface (121) of the photoelectric conversion layer (120), and a plurality of primary bus bars (140) disposed on the front surface (121) of the photoelectric conversion layer (120). Each primary bus bar (140) is electrically connected to a plurality of electrically conductive fingers (130). The solar cell (100) can include from 4 to 12 primary bus bars (140) on the front surface (121) of the photoelectric conversion layer (120) and the primary bus bars (140) on the front surface (121) of the photoelectric conversion layer (120) have a total surface area of at most about 4 cm2.

Abstract: This disclosure relates to a soldering system containing a soldering apparatus and a heating apparatus. The soldering apparatus includes a heating plate having a body defining a plurality of first air exits, each first air exit extending through the body of the heating plate and the heating plate being configured to supply hot air through the first air exits; a cover disposed on the heating plate, the cover and the heating plate defining a hot air chamber; a plurality of axially movable positioning shafts extending though the body of the heating plate, in which each shaft has a first end and a second end, the first end is in the hot air chamber, and the second end is outside the hot air chamber; and a conduit attached to the cover, the conduit being configured to supply hot air to the hot air chamber.

Abstract: A method for increasing the yield of total flavonoids in Ganoderma lucidum mycelium by an expansin comprises: (1) inoculating Ganoderma lucidum into the PD liquid fermentation medium, activating the culturing of the strains and obtaining a seed solution; (2) inoculating the seed solution into a liquid fermentation medium, culturing and adding the expansin solution, then further culturing, isolating and obtaining Ganoderma lucidum mycelium; (3) extracting flavonoids from the Ganoderma lucidum mycelium and obtaining total flavonoids. A plant expansin is used for the liquid fermentation production of flavonoids ingredients of Ganoderma lucidum, and the fermentation process and extraction method are optimized to increase greatly the yield of total flavonoids in Ganoderma lucidum.