Abstract: The present disclosure provides a back contact solar cell and a manufacturing method therefor, and a photovoltaic module, In one example, a back contact solar cell includes a semiconductor substrate, a transparent conductive layer, and an isolating protective structure. The semiconductor substrate includes a first surface and a second surface opposite to the first surface. The second surface includes N-type regions and P-type regions alternately distributed at intervals, and an isolating region between each of the N-type regions and a corresponding P-type region. The transparent conductive layer covers the second surface. An isolating groove extending through at least the transparent conductive layer is formed on each isolating region The isolating protective structure is formed on a partial region of a groove bottom of the isolating groove. The isolating protective structure includes at least a material of the transparent conductive layer.

Abstract: Implementations relating to a back contact solar cell and its preparation method are provided in this disclosure. In an implementation, a back contact solar cell includes a silicon substrate having a first surface. The first surface comprises a first conductive region, a second conductive region, and an insulation region located between the first conductive region and the second conductive region. The back contact solar cell further comprises a first transport layer located on the first conductive region and a second transport layer located on the second conductive region. The second transport layer extends from the second conductive region through the insulation region to the first conductive region, and partially covers the first transport layer, wherein a thickness of a first portion of the second transport layer located on the insulation region is greater than a thickness of a second portion of the second transport layer located on the second conductive region.

Abstract: A filtering and circulation system includes a skimmer having an upper water inlet and a lower water inlet positioned opposite the upper water inlet. A water flow driving device is fluidly coupled to the skimmer via a drainage pipe. The upper water inlet is positioned adjacent a top surface of the pool, the lower water inlet is positioned adjacent a bottom surface of the pool, and the water flow driving device circulates water discharged from the skimmer into the pool.

Abstract: The invention discloses a method for acoustic indoor positioning based on CDMA, which comprises: generating a BPSK signal; The BPSK signal was detected, the collected signal was de-carrierized and low-pass filtered, and then the data was down-sampled to the design code rate, and then the coarse position of the identification code was determined by the prefix code. Finally, the data with the same length as the identification code was intercepted from the data for matching filtering through the coarse position. Four base stations were designed in each area to obtain three TDOA observations generated by four TOA information, and the terminal position could be obtained through the three TDOA observations. Different areas are distinguished by different identification codes to achieve wide area coverage. The invention provides an effective means for accurate positioning in an indoor environment.

Abstract: Disclosed herein are compounds of formula (I) which are inhibitors of an IDO enzyme: (I). Also disclosed herein are uses of the compounds in the potential treatment or prevention of an IDO-associated disease or disorder. Also disclosed herein are compositions comprising these compounds. Further disclosed herein are uses of the compositions in the potential treatment or prevention of an IDO-associated disease or disorder.

Abstract: Disclosed are a log parsing method and device, a server and a storage medium, relating to the field of network operation and maintenance. The method includes: acquiring (101) sample log data; performing (102) clustering processing on the sample log data according to the length of each sample log in the sample log data, and beginning and ending keywords of each sample log in the sample log data, to obtain a plurality of log clusters; determining (103) a quality score of each log cluster of the plurality of log clusters obtained by the clustering processing; and parsing (104) a log according to the plurality of log clusters and quality scores of the plurality of log clusters.

Abstract: A swimming pool frame includes a plurality of side members connected together to form a frame bounding an interior area, a plurality of leg members, and a plurality of joints. Each joint is connected between two adjacent side members, and a leg member is connected to each joint. Each of the side members and leg members have a non-circular cross-sectional profile that include shapes such as polygonal or elliptical shapes, and each joint includes similarly-shaped side member insertion channels and a leg member insertion channel. Each end of each side member is adapted to be inserted into a side member insertion channel of the joint, and an upper end of each leg member is adapted to be inserted into the leg member insertion channel. A retention pin is connected between each side member insertion channel and a corresponding side member.

Abstract: A filter is provided. The filter includes: a filter cartridge, comprising a side wall and an upper end; a cartridge cover on the upper end of the filter cartridge, wherein the cartridge cover and the filter cartridge together define a first chamber. The filter further includes a filter chamber in the first chamber, a fiber filter material in the filter chamber, a water intake channel disposed on the filter cartridge or on the cartridge cover and in fluid communication with the filter chamber, and a water discharge channel in fluid communication with the filter chamber. The filter may be a water filter. An above-ground pool is also provided including the filter.

Abstract: An LED tube lamp comprises a glass tube; a diffusive layer covered on the glass tube; two end caps coupled to the glass tube; a light strip attached inside the glass tube and comprises a first set of connecting pads; a plurality of light sources; and a power supply module comprises a circuit board, a rectifying circuit, and a filtering circuit. The circuit board comprises a first surface, a second surface opposite to and substantially parallel to the first surface and the axial direction of the glass tube, and a second set of connecting pads arranged on one of the surfaces. The light strip, a portion of the circuit board being stacked with the light strip, and at least one set of the connecting pads is disposed between the light strip and the portion of the circuit board are stacked sequentially in a radial direction of the glass tube.

Abstract: This application provides an interference measurement method and apparatus. A second functional entity of an interference-generating node sends, by using one or more beams corresponding to a reference signal resource identifier of a first functional entity of the interference-generating node, a reference signal used for interference measurement, so that an interfered node can perform interference measurement.

Abstract: Disclosed is a polycyclic azide desulfurizer, including the following raw materials in parts by mass: 20-35 parts of an alcohol amine, 20-35 parts of an amide, and an aldehyde, which is 10-15 parts of a small-molecule aldehyde or 20-35 parts of a polyaldehyde. Also disclosed is a method for synthesis of the polycyclic azide desulfurizer, including: mixing an alcohol amine with an amide and stirring, heating, adding a catalyst I dropwise, and performing reaction to obtain a monocyclic triazine, heating the monocyclic triazine, mixing with a polyaldehyde and stirring, adding a catalyst II dropwise, and performing coupling while stirring; alternatively, mixing a small-molecule aldehyde with an amide and stirring, heating, adding a catalyst I dropwise, and performing reaction, adding an alcohol amine, adding a catalyst II dropwise, and performing coupling while stirring; and separating a by-product from a product obtained after the coupling out, and purifying the product.

Abstract: A method for displaying handwritten or drawn content includes: detecting a contact gesture on a touchscreen; enabling a handwriting or drawing mode based on a fact that the contact gesture is a swipe gesture and the swipe gesture meets a preset condition; and detecting a handwriting or drawing gesture on the touchscreen, and displaying, in a target screen, handwritten or drawn content corresponding to the handwriting or drawing gesture. In this disclosure, enabling of the handwriting or drawing mode is triggered by using a handwriting or drawing process of a user, and there is no need to deliberately search the target screen for a virtual control that is used to enable the handwriting or drawing mode, so that learning costs of the user are reduced.

Abstract: A joint for a swimming pool frame, and a swimming pool including the joint are provided. The joint includes a joint body including a leg pipe holder configured to have a leg pipe of the swimming pool frame inserted into the leg pipe holder. The joint also includes a side pipe holder configured to have a side pipe of the swimming pool frame inserted in the side pipe holder. A locking hole is formed through the side pipe holder. The joint body also includes a locking part including a locking pin configured to extend through the locking hole and through a corresponding connecting hole in the side pipe, thereby holding the side pipe to the side pipe holder.

Abstract: This application provides a trace chain information query method, including: receiving, by a trace chain server, first trace chain information sent by a first service node and second trace chain information sent by a second service node, where the first service node is a service node in a first trace chain, the second service node is a service node in a second trace chain, both the first trace chain and the second trace chain are generated as triggered by a same user operation, the first trace chain information includes a group identifier, the second trace chain information includes the group identifier, and the group identifier is used to indicate the user operation; and finding, by the trace chain server, the first trace chain information and the second trace chain information based on the group identifier.

Abstract: The present disclosure belongs to technical field of indoor positioning, and discloses a method and system for wide-area acoustic indoor positioning based on RF enhancement, comprising: design of an acoustic signal, using Blackman window function to control the amplitude of acoustic signal entering and leaving channel; a mixed multiple access transmission of the acoustic signal, combining three multiple access schemes of time, space and frequency, assisting a small amount of BLE signals, and constructing a wide-area coverage capability of the acoustic positioning signal; acoustic measurement based on RF enhancement, including TOA estimation of an acoustic signal and area identification based on low-power Bluetooth RSS; robust fusion positioning of an inertial sensor and multi-source measurement, including pedestrian walking speed estimation, multi-source heterogeneous measurement, acoustic measurement compensation and correction, measurement quality evaluation and control.

Abstract: A directional and timing control circuit is provided. the circuit includes a main control chip, a power supply module to supply power to the main control chip, a driver module configured to receive a control command from the main control chip and to control a motor according to the control command, a Hall module configured to detect an operation direction of the motor and transmit an operation direction signal to the main control chip, and a zero-crossing detection module configured to detect a zero-crossing cycle of the alternating current power supply to thereby obtain a current utility frequency of the alternating current power supply as a timing frequency of the main control chip, the zero-crossing detection module including an input terminal connected to the alternating current power supply and an output terminal connected to a phase detection terminal of the main control chip.

Abstract: An inflatable stand-up paddle board (SUP) and a built-in inflation pump are provided. The inflation pump includes a pump body incorporated into a body of the SUP, an inflation assembly, and inflation and deflation valves in communication with an air chamber of the SUP. The body of the SUP includes first and second surfaces and a lateral confining band extending in a circumferential direction of the SUP and covering edges of the first and second surfaces. A mounting space may extend through the air chamber and the inflation pump may be mounted within the mounting space.