Abstract: A fault-tolerant control method and apparatus of a floating wind turbine are provided. The fault-tolerant control method and apparatus of a floating wind turbine can acquire a low-order nonlinear model of a pre-established floating wind turbine, establish a switching linear model of the floating wind turbine based on the low-order nonlinear model, acquire a modal parameter of the current floating wind turbine, and determine based on the modal parameter a sub-model that the floating wind turbine currently satisfies, so as to establish a switching sliding mode surface and a full-order state observer of the floating wind turbine based on the sub-model and the modal parameter, and further calculate a feedback output of a controller of the floating wind turbine according to the switching sliding mode surface and the full-order state observer.

Abstract: A station (STA) configured for operation in a wireless local area network (WLAN) may implement an unequal Modulation and Coding Scheme (MCS) for Probabilistic Constellation Shaping using first and second shaping encoders. The first shaping encoder may encode a first segment of input bits for a first modulation order and generate a first shaped bit stream and the second shaping encoder may encode a second segment of input bits for a second modulation order to generate a second shaped bit stream. A first QAM symbol stream may be generated at least from the first shaped bit stream and from parity bits using the first modulation order and a second QAM symbol stream may be generated at least from the second shaped bit stream and from parity bits using the second modulation order. The STA may generate the parity bits from the first and second shaped bit streams with one or more LDPC encoders and may transmit the first and second QAM symbol streams within a PPDU.

Abstract: The disclosure provides a low-density PVC plastics flooring and a preparation method thereof, which belongs to the technical field of films for floor. The disclosure provides a low-density PVC plastics flooring, which is prepared from components including, in parts by mass, 100 parts of PVC, 300-380 parts of calcium carbonate, 7-12 parts of a stabilizer, 2-8 parts of processing aid ACR, 12-16 parts of a foaming regulator, 0.1-0.5 parts of a foaming agent, 2-4 parts of G60 lubricant, and 2-4 parts of PE wax. In the disclosure, the density of the PVC plastics flooring is reduced to 1.4-1.6 g/cm3 even increasing the amount of calcium carbon, thereby greatly reducing the production cost and improving the economic efficiency.

Abstract: Provided are control method and device of an energy-storage coordinated floating wind turbine, relating to the technical field of wind turbines. The control method of an energy-storage coordinated floating wind turbine can construct a primary frequency regulation model of a floating wind farm based on a frequency response unit, construct a second frequency regulation model according to an energy storage system, further construct, according to the primary frequency regulation model and the second frequency regulation model, a frequency regulation model of a hybrid power system containing the floating wind farm, the energy storage system, and a pre-set thermal power unit, and design an overall frequency regulation control strategy of the hybrid power system based on the frequency regulation model of the hybrid power system.

Abstract: This disclosure describes systems, methods, and devices related to enhanced low-density parity-check (LDPC) coding. A device may generate a frame comprising a data field, wherein the data field comprises a number of information bits. The device may calculate a required initial number of orthogonal frequency-division multiplexing (OFDM) symbols based on the number of information bits. The device may calculate an initial number of segments in a last OFDM symbol of the number of OFDM symbols. The device may calculate a number of data bits that can be filled within an initial number of OFDM symbols. The device may determine an LDPC codeword length based on the calculated number of data bits that can be filled. The device may cause to send the frame to one or more devices based on the LDPC codeword length.

Abstract: An apparatus and method of signaling coding type is disclosed. The coding types include binary convolutional coding (BCC), legacy lifted Low-Density Parity Check (LDPC) code, and lifted LDPC code having a length that is a multiple of the maximum legacy LDPC code. The number of bits used to indicate the coding type in a User Info field depends on whether multiple lifted LDPC codes are available for encoding, whether the lifted LDPC code is an optional coding type, or a payload size. The frame containing the User Info field is transmitted to another STA and the response contains a payload encoded using the indicated coding type.

Abstract: The present disclosure provides a foamed PET composite board and a preparation method thereof. The foamed PET composite board provided is prepared from a raw material including the following components in parts by mass: 100 parts of PET, 10-20 parts of a regulator, 100-200 parts of an inorganic filler, 1-2 parts of a blowing agent, and 1-4 parts of PE wax, and the PET is recycled PET.

Abstract: A die-formed chamfered plastic floor and a preparation method thereof are disclosed. The method includes: mixing raw materials for preparing a plastic floor matrix to obtain a mixed material; subjecting the mixed material to an extrusion, a laminating-embossing treatment, a die forming-chamfering treatment, a coating with an ultraviolet curable paint, a slicing, and a tenoning in sequence, to obtain the die-formed chamfered plastic floor. In the disclosure, a die forming-chamfering treatment is set between a laminating-embossing treatment and a coating with an ultraviolet curable paint, and thereby a chamfer embossing could be formed on the surface of the workpiece through pressing.

Abstract: Disclosed are a textile waste regenerated flooring and a preparation method thereof. The textile waste regenerated flooring is prepared from components including 30-50 parts by weight of a textile waste fiber, 30-50 parts by weight of an inorganic filler, and 10-30 parts by weight of polyethylene, wherein the textile waste fiber is prepared from a textile waste. In the disclosure, there is no limitation to the source of the waste textile through accurately controlling dosages of waste textile, inorganic filler and polyethylene.

Abstract: The present disclosure provides a foamed PET composite board and a preparation method thereof. The foamed PET composite board provided is prepared from a raw material including the following components in parts by mass: 100 parts of PET, 10-20 parts of a regulator, 100-200 parts of an inorganic filler, 1-2 parts of a blowing agent, and 1-4 parts of PE wax, and the PET is recycled PET.

Abstract: Disclosed are a textile waste regenerated flooring and a preparation method thereof. The textile waste regenerated flooring is prepared from components including 30-50 parts by weight of a textile waste fiber, 30-50 parts by weight of an inorganic filler, and 10-30 parts by weight of polyethylene, wherein the textile waste fiber is prepared from a textile waste. In the disclosure, there is no limitation to the source of the waste textile through accurately controlling dosages of waste textile, inorganic filler and polyethylene.

Abstract: A die-formed chamfered plastic floor and a preparation method thereof are disclosed. The method includes: mixing raw materials for preparing a plastic floor matrix to obtain a mixed material; subjecting the mixed material to an extrusion, a laminating-embossing treatment, a die forming-chamfering treatment, a coating with an ultraviolet curable paint, a slicing, and a tenoning in sequence, to obtain the die-formed chamfered plastic floor. In the disclosure, a die forming-chamfering treatment is set between a laminating-embossing treatment and a coating with an ultraviolet curable paint, and thereby a chamfer embossing could be formed on the surface of the workpiece through pressing.

Abstract: The disclosure provides a low-density PVC plastics flooring and a preparation method thereof, which belongs to the technical field of films for floor. The disclosure provides a low-density PVC plastics flooring, which is prepared from components including, in parts by mass, 100 parts of PVC, 300-380 parts of calcium carbonate, 7-12 parts of a stabilizer, 2-8 parts of processing aid ACR, 12-16 parts of a foaming regulator, 0.1-0.5 parts of a foaming agent, 2-4 parts of G60 lubricant, and 2-4 parts of PE wax. In the disclosure, the density of the PVC plastics flooring is reduced to 1.4-1.6 g/cm3 even increasing the amount of calcium carbon, thereby greatly reducing the production cost and improving the economic efficiency.

Abstract: The disclosure belongs to the technical field of floor preparation, and provides a method for treating a surface of a floor. Compared with traditional methods for preparing floor, in the method according to the disclosure, an embossing is performed not directly after laminating, but after applying a wear-resistant primer, and a topcoat is then applied. Therefore, the resulting embossed floor has a clear texture. Further, the composition of the wear-resistant primer could be optimized, such that the resulting embossed floor exhibits excellent wear resistance and hardness.

Abstract: An artificial tile is provided for use as a building decoration material. The artificial tile includes a glass magnesium plate, an upper hard layer, a lower hard layer, and a UV layer disposed on the surface of the upper hard layer. The hard layer is disposed between the glass magnesium plate layer and the UV layer, so that the hard layer can not only serve as a connecting layer to promote the connection between the UV layer and the glass magnesium plate, but also serve as a supporting layer to offset the influence of temperature and external force on the glass magnesium plate, to prevent the glass magnesium plate from being deformed under the action of the temperature or the external force, thereby making the conventional UV layer also have anti-scratch and anti-slip functions while having an antifouling function.

Abstract: The present invention belongs to the technical field of board materials, and particularly relates to a weather-resistant composite floor and a preparation method thereof, and an artificial mineral floor and a preparation method thereof. The weather-resistant composite floor provided by the present invention sequentially includes a wear layer, an artificial mineral board and a back lay which are laminated and bonded with one another; the artificial mineral board includes modified mineral layers and fiberglass mesh layers which are alternately laminated; and the bottom and top layers of the artificial mineral board are the modified mineral layers. The wear layer and the back lay are respectively bonded to two opposite sides of the artificial mineral board.

Abstract: A hard flooring plank and a wall panel plank. The hard flooring plank includes a flooring plank body. A bottom surface of the flooring plank body is bonded with a retractable bonding element. A lower surface of the retractable bonding elements is bonded with a release paper layer. The wall panel plank includes a wall panel plank body. An inner side surface of the wall panel plank is bonded with a retractable bonding element, and the other side surface of the retractable bonding element is bonded with a release paper layer. The hard flooring plank not only overcomes the disadvantage of the hard flooring plank, but also has the advantages of a resilient flooring plank, so that a new breakthrough on the structure of the flooring plank body is achieved.

Abstract: The present invention provides a polyvinyl chloride polymer (PVC) composite material including 40-60 parts by weight of PVC, 40-60 parts by weight of light calcium carbonate, 0.8-1.2 parts by weight of composite foaming agent including an inorganic foaming agent and an organic foaming agent, 3-5 parts by weight of foam regulator, 2-4 parts by weight of toughener, 0.8-1.2 parts by weight of lubricant, and 1.5-2.5 parts by weight of stabilizer. The ratio of the inorganic foaming agent to the organic foaming agent by weight in the composite foaming agent is ½-1. Meanwhile, the present invention provides a foam board made of the PVC composite material, an associated production method, an apparatus, and flooring. The resulting PVC products have a high-strength structure and a good foaming property, thus having a satisfied mute effect.

Abstract: A polyvinyl chloride polymer (PVC) composite material is described herein. The PVC composite material includes 40-60 parts by weight of PVC, 40-60 parts by weight of calcium carbonate, 0.2-0.6 parts by weight of composite foaming agent, 3-5 parts by weight of foam regulator, 2-4 parts by weight of toughener, 0.8-1.2 parts by weight of lubricant, and 2-3 parts by weight of stabilizer. Meanwhile, the present invention provides a foam board made of the PVC composite material and flooring. The resulting PVC products have a high-strength structure and a good foaming property, bring the comfort to feet as the resilient flooring does, have a satisfied sound reduction and can be easily installed as the hard flooring could.

Abstract: The present invention provides a polyvinyl chloride polymer (PVC) composite material including 40-60 parts by weight of PVC, 40-60 parts by weight of light calcium carbonate, 0.8-1.2 parts by weight of composite foaming agent including an inorganic foaming agent and an organic foaming agent, 3-5 parts by weight of foam regulator, 2-4 parts by weight of toughener, 0.8-1.2 parts by weight of lubricant, and 1.5-2.5 parts by weight of stabilizer. The ratio of the inorganic foaming agent to the organic foaming agent by weight in the composite foaming agent is 1/2-1. Meanwhile, the present invention provides a foam board made of the PVC composite material, an associated production method, an apparatus, and flooring. The resulting PVC products have a high-strength structure and a good foaming property, thus having a satisfied mute effect.