Abstract: The present disclosure discloses a method for automatically identifying south troughs by improved Laplace and relates to the technical field of meteorology. The method includes the following steps: acquiring grid data of a geopotential height field; calculating a gradient field of the geopotential height field in an x direction; searching for a turning point where a gradient value turned from being negative to being positive, and cleaning the gradient field; calculating a divergence of the x direction to obtain an improved Laplacian numerical value L?; performing 0,1 binarization processing on the L? to obtain a black-and-white image and a plurality of targets of potential troughs, merging the black-and-white image and the plurality of targets of the potential troughs by expansion, recovering original scale through erosion, and selecting an effective target through an angle of direction of a contour and an axial ratio.

Abstract: An image display method includes: obtaining attribute information of each of sub-pixels in an under-display camera region and in a normal display region; calculating a compensated brightness value of the under-display camera region and an attenuated brightness value of the normal display region according to the attribute information; displaying an image according to the compensated brightness value of the under-display camera region and the attenuated brightness value of the normal display region.

Abstract: An image display method includes: obtaining attribute information of each of sub-pixels in an under-display camera region and in a normal display region; calculating a compensated brightness value of the under-display camera region and an attenuated brightness value of the normal display region according to the attribute information; displaying an image according to the compensated brightness value of the under-display camera region and the attenuated brightness value of the normal display region.

Abstract: A fireproof and waterproof biomass floor and a manufacturing method therefor. The floor comprises, in parts by weight, 80-95 parts of a wood fiber, 5-20 parts of an additive, and 0-1 part of a pigment. The additive comprises the following raw material components in percentage by weight: a metal oxide: 10-20 wt %; a hydrochloride: 10-20 wt %; a non-metal oxide: 5-10 wt %; a weak acid: 5-10 wt %; a sulfate: 1-2 wt %; a phosphate: 1-2 wt %; and water: 36-68 wt %. The manufacturing method comprises: mixing the wood fiber, the additive, and the pigment; flatly laying the obtained mixture on a base plate; performing die pressing, and standing for 3-10 days; performing demolding; subjecting the obtained demolded plate to edge cutting, drying, sanding, assembling, hot pressing, cutting, curing, slotting, and silent pad pasting on the back face. The floor has the advantages of being fireproof, ultralow in water absorption thickness expansion rate, and ultralow in formaldehyde release amount.

Abstract: The invention relates to a method for combined use of various batteries, and belongs to the technical field of batteries. The method comprises the steps: setting a full-charge reference capacity of batteries; selecting the batteries meeting the capacity requirement selected from a battery set to form a new battery set, and then forming a set including various batteries; selecting battery modules to form a set; and adjusting the state of charge of the selected battery modules, and then connecting the battery modules in series for use. As a supplement to existing usage methods, the management method for combined use of various batteries can fulfill safe and reasonable series use of different types of batteries, and lithium ion batteries are used more effectively.

Abstract: The present disclosure relates to a circuit for providing a current from a source to a load. A commutation cell includes a main switch that controls a voltage applied by the source to the load. An opposite switch maintains the current in the load when the load is disconnected from the source by the main switch. The opposite switch returns the load current to the main switch when the main switch connects again the load to the source. The disclosed circuit configuration reduces recovery current, losses and electromagnetic losses. A synchronizing controller controls opening and closing sequences of the main switch and of the opposite switch. The disclosed circuit can provide a DC-DC voltage converter. Combining two such circuits can provide a DC-AC voltage converter.

Abstract: The present invention relates to an isolating two-way constant-current maintenance system based on a power supply of shared equipment, comprising a power supply, an electronic switch K1, a current sensor, a main battery management system controller, and a plurality of secondary battery management system controllers; wherein the power supply is connected with the current sensor; the current sensor is respectively connected with the electronic switch K1 and the main battery management system controller; the electronic switch is respectively connected with the main battery management system controller and the secondary battery management system controllers; the main battery management system controller is respectively in a communication connection with the plurality of secondary battery management system controllers; and each one of the secondary battery management system controllers is connected with a battery pack.

Abstract: The invention relates to a method for combined use of various batteries, and belongs to the technical field of batteries. The method comprises the steps: setting a full-charge reference capacity of batteries; selecting the batteries meeting the capacity requirement selected from a battery set to form a new battery set, and then forming a set including various batteries; selecting battery modules to form a set; and adjusting the state of charge of the selected battery modules, and then connecting the battery modules in series for use. As a supplement to existing usage methods, the management method for combined use of various batteries can fulfill safe and reasonable series use of different types of batteries, and lithium ion batteries are used more effectively.

Abstract: The present disclosure relates to a circuit for providing a current from a source to a load. A commutation cell includes a main switch that controls a voltage applied by the source to the load. An opposite switch maintains the current in the load when the load is disconnected from the source by the main switch. The opposite switch returns the load current to the main switch when the main switch connects again the load to the source. The disclosed circuit configuration reduces recovery current, losses and electromagnetic losses. A synchronizing controller controls opening and closing sequences of the main switch and of the opposite switch. The disclosed circuit can provide a DC-DC voltage converter. Combining two such circuits can provide a DC-AC voltage converter.

Abstract: The present invention relates to an isolating two-way constant-current maintenance system based on a power supply of shared equipment, comprising a power supply, an electronic switch K1, a current sensor, a main battery management system controller, and a plurality of secondary battery management system controllers; wherein the power supply is connected with the current sensor; the current sensor is respectively connected with the electronic switch K1 and the main battery management system controller; the electronic switch is respectively connected with the main battery management system controller and the secondary battery management system controllers; the main battery management system controller is respectively in a communication connection with the plurality of secondary battery management system controllers; and each one of the secondary battery management system controllers is connected with a battery pack.

Abstract: This invention discloses a method of performance analysis for VRLA battery which applies the method of using the float voltage dispersion ratio of the battery to evaluate the battery performance from a new perspective, and it is an online real-time test which applies several ways to evaluate the performance of the VRLA battery. According to the relevance between the dispersion of the float charge voltage of the battery and its performance, the method gets the result of the battery performance through calculating the battery float charge voltage dispersion ratio and making it relevant with the battery performance. It has small workload, convenient operation and no danger to the system when doing online testing. It also won't affect the cycle life of the VRLA battery.

Abstract: The present invention discloses a professional diagnosis method of battery performance analysis, Through the overall evaluation of experiential data library, several parameters about the battery are input into the artificial neural network, outputting capacity prediction and service life prediction of each battery, etc. and giving useful advices for each battery. Therefore the result is much more in conformity with the real condition of the battery. Besides, it designs an adaptive learning function of the abovementioned artificial neural network. This invention effectively avoids the defect of evaluating the VRLA battery performance at single moment, from single perspective and by single method, and it does the real-time monitoring and evaluating for the performance of the battery during VRLA battery working period, which is easy to operate, and avoids checking discharge test to the battery so that it doesn't affect the cycle life of the VRLA battery.

Abstract: A multi-position clutch allows selectively coupling at least two of at least three rotatable shafts is described herein. The clutch comprises at least three cooperation elements respectively associated to one of the at least three rotatable shafts for selective engagement therebetween; the at least three cooperation elements are mounted to the at least three rotatable shafts so as to be sequentially positioned for selective coupling of at least two adjacent cooperation elements. An actuating mechanism is provided for selectively coupling at least two adjacent cooperation elements from the at least three cooperation elements.

Abstract: The present invention discloses a professional diagnosis method of battery performance analysis, Through the overall evaluation of experiential data library, several parameters about the battery are input into the artificial neural network, outputting capacity prediction and service life prediction of each battery, etc. and giving useful advices for each battery. Therefore the result is much more in conformity with the real condition of the battery. Besides, it designs an adaptive learning function of the abovementioned artificial neural network. This invention effectively avoids the defect of evaluating the VRLA battery performance at single moment, from single perspective and by single method, and it does the real-time monitoring and evaluating for the performance of the battery during VRLA battery working period, which is easy to operate, and avoids checking discharge test to the battery so that it doesn't affect the cycle life of the VRLA battery.

Abstract: This invention discloses a method of performance analysis for VRLA battery which applies the method of using the float voltage dispersion ratio of the battery to evaluate the battery performance from a new perspective, and it is an online real-time test which applies several ways to evaluate the performance of the VRLA battery. According to the relevance between the dispersion of the float charge voltage of the battery and its performance, the method gets the result of the battery performance through calculating the battery float charge voltage dispersion ratio and making it relevant with the battery performance. It has small workload, convenient operation and no danger to the system when doing online testing. It also won't affect the cycle life of the VRLA battery.

Abstract: A first aspect of the present invention is concerned with a series hybrid drive train for a vehicle comprising a traction motor, an electric generator, a three-position clutch (20) and a controller. The three-position clutch allows the generator to be connected to an internal combustion engine (12) of the vehicle, to the traction motor or to remain freewheeling. In a second aspect of the present invention, a four-position clutch is used to further allow the internal combustion engine to be connected directly to the wheels to thereby yield a series/parallel drive train. A third aspect of the present invention is concerned with a method of operating such a hybrid drive train.

Abstract: A multi-position clutch allows selectively coupling at least two of at least three rotatable shafts is described herein. The clutch comprises at least three cooperation elements respectively associated to one of the at least three rotatable shafts for selective engagement therebetween; the at least three cooperation elements are mounted to the at least three rotatable shafts so as to be sequentially positioned for selective coupling of at least two adjacent cooperation elements. An actuating mechanism is provided for selectively coupling at least two adjacent cooperation elements from the at least three cooperation elements.

Abstract: A multi-position clutch allows selectively coupling at least two of at least three rotatable shafts is described herein. The clutch comprises at least three cooperation elements respectively associated to one of the at least three rotatable shafts for selective engagement therebetween; the at least three cooperation elements are mounted to the at least three rotatable shafts so as to be sequentially positioned for selective coupling of at least two adjacent cooperation elements. An actuating mechanism is provided for selectively coupling at least two adjacent cooperation elements from the at least three cooperation elements.

Abstract: The present invention is generally concerned with an inductance assembly that is so configured and sized as to be inserted inside the cooling assembly of an electric machine to thereby decrease the overall volume of the machine.

Abstract: The present invention is generally concerned with an inductance assembly that is so configured and sized as to be inserted inside the cooling assembly of an electric machine to thereby decrease the overall volume of the machine.