Abstract: A fault root cause analysis method and apparatus are provided. The method includes: obtaining a first alarm event set, where the first alarm event set includes a plurality of alarm events; for a first alarm event in the first alarm event set, extracting a feature vector of the first alarm event, where a part of or all features of the feature vector are used to represent a relationship between the first alarm event and another alarm event in the first alarm event set; and determining, based on the feature vector of the first alarm event, whether the first alarm event is a root cause alarm event. In this application, whether the first alarm event is the root cause alarm event is determined based on a feature vector of the relationship between the first alarm event and the another alarm event, and the accuracy of fault root cause identification is improved.

Abstract: A method for removing an undesired coating from a front face of a crystalline silicon solar cell includes: S1: depositing an Al2O3 film, an SiO2 film, and an SiNx film on a back face of a silicon wafer to form a backside passivation film, and forming an undesired coating on an edge of the front face of the silicon wafer; S2: preparing an aqueous film on a surface of the backside passivation film of the product obtained in S1; S3: passing the product obtained in S2 through an acid tank to remove the undesired coating; S4: passing the product obtained in S3 through a water tank to remove a residual treatment solution; and S5: drying the product obtained in S4.

Abstract: A light emitting apparatus, including: a first light emitting device with a first substrate having a first upper surface and first bottom surface, a plurality of first LED chips disposed on the first upper surface, emitting a light penetrating the first substrate, and a first wavelength conversion layer directly contacting the plurality of first LED chips and first upper surface, and a first shape in a cross-sectional view; a second wavelength conversion layer directly contacting the first bottom surface; a second shape in the cross-sectional view substantially the same as the first shape; a second light emitting device separated from the first light emitting device, including a second substrate and plurality of second LEDs disposed on the second substrate; a support base connected to the first light emitting device by a first angle and connected to the second light emitting device by a second angle; and a first support arranged between the support base and first light emitting device.

Abstract: An antenna device includes an insulating carrier and a first primary antenna having a first feeding-in section, a first auxiliary antenna having a second feeding-in section and a second grounding section, a second primary antenna having a third feeding-in section, a second auxiliary antenna having a fourth feeding-in section and a grounding face which are provided on a face of the carrier. The first primary and auxiliary antennas and the second primary and auxiliary antennas are positioned at two side edges of the carrier which are away from each other. The grounding face is positioned between both the first primary and auxiliary antennas and the second primary and auxiliary antennas. The grounding face is provided with a first grounding section adjacent to the first feeding-in section, a third grounding section adjacent to third feeding-in section and a fourth grounding section adjacent to the fourth feeding-in section.

Abstract: A gas sensing device includes a substrate, a conductive unit, and a sensing layer. The conductive unit is disposed on the substrate, and includes two electrodes. The sensing layer is disposed on the conductive unit, and is electrically connected with the electrodes. The sensing layer adapted to absorb carbon dioxide includes polyethyleneimine and polyethylene glycol. A detecting system including a testing device, an analyzing device and the aforementioned gas sensing device is also disclosed. The gas sensing device is detachably mounted to and is electrically connected to the testing device. Electrical property of the gas sensing device 100 changes when the gas sensing device 100 absorbs carbon dioxide.

Abstract: A capacitive touch sensor is disclosed for use with input signal. The capacitive touch sensor includes a number n of input/output lines. Each of the number n of input/output lines is electrically disconnected from every other of the number n of input/output lines. Each of the number n of input/output lines is arranged to cross every other of the number n of input/output lines. Each of a number ? of positions includes one of the number n of input/output lines crossing another of the number n of input/output lines.

Abstract: A light-emitting device including a substrate with a top surface and a bottom surface opposite to the top surface and a plurality of LED chips disposed on the top surface and configured to generate a top light visible above the top surface and a bottom light visible beneath the bottom surface, each LED chip comprising a plurality of light-emitting surfaces. The substrate has a thickness greater than 200 ?m and comprises aluminum oxide, sapphire, glass, plastic, or rubber. The plurality of LED chips has an incident light with a wavelength of 420-470 nm. The top light and the bottom light have a color temperature difference of not greater than 1500K.

Abstract: A capacitive touch sensor is disclosed for use with input signal. The capacitive touch sensor includes a number n of input/output lines. Each of the number n of input/output lines is electrically disconnected from every other of the number n of input/output lines. Each of the number n of input/output lines is arranged to cross every other of the number n of input/output lines. Each of a number ? of positions includes one of the number n of input/output lines crossing another of the number n of input/output lines.

Abstract: Disclosed is a positive electrode of a crystalline silicon solar cell with a break-proof grid function, comprising a positive electrode busbar (1), a positive electrode grid (2), and a break-proof grid structure (3). The break-proof grid structure (3) and the positive electrode grid (2) are integrally printed and formed. The break-proof grid structure (3) is an octagon with a hollow-out groove (4) provided on its rear side. The break-proof grid structure (3) includes a rectangular grid segment (31) located in the middle, and two isosceles trapezoidal grid segments (32) that are located at both sides of the rectangular grid segment (31) and are provided symmetrically with the rectangular grid segment (31) as a center. The rectangular grid segment (31) spans the positive electrode busbar (1), and the left and right ends of the rectangular grid segment (31) extend out of the positive electrode busbar (1). The extended grid segment is a rectangular extensional break-proof grid segment (311).

Abstract: A low profile dual-frequency antenna device comprises an insulative carrier having a first surface and a second surface which are opposite and a conductor unit, the conductor unit comprises a first conductor which is provided to the first surface and a second conductor which is provided to the second surface and connected with the first conductor, a first radiation slot as a low frequency slot antenna is formed between the first conductor and the second conductor, the first conductor is formed with a second radiation slot, a third radiation slot which is communicated with the first radiation slot and the second radiation slot, a fourth radiation slot and a fifth radiation slot, and the third radiation slot, the fourth radiation slot and the fifth radiation slot together constitute a high frequency slot antenna, the second radiation slot decides an impedance and a resonance frequency width of each antenna, a first side edge and a second side edge is oppositely positioned at a location where the second radiatio

Abstract: Disclosed is a screen printing plate (5) for manufacturing a crystalline silicon solar cell, a positive electrode of the crystalline silicon solar cell comprising a positive electrode busbar (1), a positive electrode grid (2) and a break-proof grid structure (3), wherein the screen printing plate (5) is used at least for integrally printing and forming the positive electrode grid (2) and the break-proof grid structure (3). The screen printing plate (5) is provided with a blocking portion for blocking the passage of a paste, the blocking portion is a photosensitive emulsion (6) or a non-photosensitive emulsion, and the blocking portion corresponds to the break-proof grid structure (3) of the positive electrode and is used for forming a hollow-out groove (4) in the break-proof grid structure (3) when the positive electrode is printed.

Abstract: A method for removing an undesired coating from a front face of a crystalline silicon solar cell includes: S1: depositing an Al2O3 film, an SiO2 film, and an SiNx film on a back face of a silicon wafer to form a backside passivation film, and forming an undesired coating on an edge of the front face of the silicon wafer; S2: preparing an aqueous film on a surface of the backside passivation film of the product obtained in S1; S3: passing the product obtained in S2 through an acid tank to remove the undesired coating; S4: passing the product obtained in S3 through a water tank to remove a residual treatment solution; and S5: drying the product obtained in S4.

Abstract: The present invention discloses a method for preparing a bifacial PERC solar cell. The present invention has high photoelectric conversion efficiency, high appearance quality, and high EL yield, and could solve the problems of both scratching and undesirable deposition.

Abstract: The disclosure provides a method for preparing a crystalline silicon solar cell. The method includes: (1) forming a textured surface on a front face of a silicon wafer; (2) depositing a tunneling layer and a doped polysilicon layer on the textured surface of the silicon wafer; (3) depositing a first anti-reflection film layer on the front face of the silicon wafer; and (4) removing the tunneling layer by a laser, the doped polysilicon layer, and the first anti-reflection film layer from a non-electrode region on the front face of the silicon wafer.

Abstract: The present invention discloses a tubular PECVD device for bifacial PERC solar cell. The present invention bifacial PERC solar cell has high photoelectric conversion efficiency, high appearance quality, and high EL yield, and could solve the problems of both scratching and undesirable deposition.

Abstract: A fault root cause analysis method and apparatus are provided. The method includes: obtaining a first alarm event set, where the first alarm event set includes a plurality of alarm events; for a first alarm event in the first alarm event set, extracting a feature vector of the first alarm event, where a part of or all features of the feature vector are used to represent a relationship between the first alarm event and another alarm event in the first alarm event set; and determining, based on the feature vector of the first alarm event, whether the first alarm event is a root cause alarm event. In this application, whether the first alarm event is the root cause alarm event is determined based on a feature vector of the relationship between the first alarm event and the another alarm event, and the accuracy of fault root cause identification is improved.

Abstract: Provided are a bifacial P-type PERC solar cell, preparation method, module and system.

Abstract: A method for obtaining a standard configuration template of a network device and a computing device includes obtaining configuration commands of a plurality of network devices, erating a command template set including a plurality of different command templates, generating a correlation matrix based on the command template set, clustering the plurality of network devices based on the correlation matrix to obtain at least two categories of network devices, dividing the correlation matrix into a plurality of submatrixes based on a clustering result, performing singular value decomposition on each submatrix to obtain a non-zero singular value, and using, as a standard configuration template of a corresponding category, a command template in the command template set that makes a contribution greater than a threshold to the non-zero singular value.

Abstract: A bifacial P-type PERC solar cell beneficial to sunlight absorption and a preparation method therefor are provided. The solar cell includes consecutively, from the bottom up, a rear electrode (1), a rear silicon nitride film (3), a rear alumina film (4), a P-type silicon (5), an N-type silicon (6), a front silicon nitride film (7) and a front silver electrode (8), wherein a front surface of the P-type silicon is provided with a plurality of parallel grooves (10) which are exposed to the front silicon nitride film. A length direction of a groove of the grooves is parallel to a front silver busbar electrode (81), and an inner surface of the groove is a textured surface which can receive sunlight incident from different directions and capture the sunlight through multiple reflections and incidences inside the groove.

Abstract: The present invention provides a power supply controlling module, which is suitable for a power supply controlling device. The power supply controlling device comprises a power source and a plurality of connecting ports. The power supply controlling module comprises a plurality of control units and a resistance. Each of the control units respectively connects with each of the connecting ports. The control units comprise a first control unit and at least one second control unit. The resistance electrically connects with the control units. The first control unit comprises a detecting circuit and a first control circuit, which respectively connects with the resistance. Each of the at least one second control unit comprises a second control circuit, which respectively connects with the resistance.