Abstract: Herein provides a non-covalent dimer cation of formula (A), a tautomer thereof, or a stereoisomer thereof. Herein provides a salt, which includes the cation of the present application and a first anion. Herein provides use of the cation of the present application or the salt of the present application in antioxidation, preparation of an antioxidant, preparation of a drug for inhibiting, reducing or reversing oxidative stress in human or animal cells, or preparation of a drug for treating an oxidative stress-associated disease or symptom, such as, use in preparation of a drug for treating non-alcoholic fatty liver disease.

Abstract: A method and a system for recommending a target garment matching an inputted garment. The method includes: extracting attributes from text description and image of the inputted garment to obtain extracted attributes; querying a knowledge graph using the extracted attributes to obtain matched attributes; retrieving candidate products from a garment pool using the matched attributes; extracting features from the inputted garment and the candidate products; determining the target garment from the candidate products based on grading scores between the features of the inputted garment and the features of the candidate products; and recommending the target garment. The knowledge graph includes nodes corresponding to type of clothes, category of clothes, attribute keys, values of attribute keys, context keys, values of context keys, combination of the values of the attribute keys and the type of clothes, and combination of the value of the attribute keys and the category of clothes.

Abstract: A method for evaluating rock drillability by a nano-indentation test on a rock cutting includes: conducting a nano-indentation test on a rock cutting sample, acquiring a displacement-load curve of an indenter, and calculating a micro-hardness under the nano-indentation test; calculating mineral composition of the rock cutting sample based on a statistical distribution characteristic of the micro-hardness, and transforming the micro-hardness under the nano-indentation test on the rock cutting sample into a macro-hardness; and calculating a rock drillability grade characterized by the micro-hardness under the nano-indentation test on the rock cutting sample based on a correlation between the macro-hardness of the rock cutting sample and the rock drillability grade. In the context of few downhole rock samples and high cost, the method overcomes the limitation of sample size and shape on conventional testing and solves the difficult problem of mechanical parameter testing of deep rocks.

Abstract: The present application provides a network access method, apparatus and device, the method includes: acquiring device information of a mesh network device after registration; determining a first master node set to be connected according to the device information of the mesh network device; determining a first target master node device from the first master node set based on a master node selection manner, determining the device group corresponding to the first target master node device, and acquiring a target node device in the device group corresponding to the first target master node device; and connecting the mesh network device to the target node device to enable a terminal device connected to the mesh network device to realize network access through a communication link corresponding to the mesh network device.

Abstract: Provided are an information processing method and system, an electrical device, and an edge computing device. The method includes receiving at least one of preset information sent by an edge computing device or operation parameter information of the electrical device sent by the edge computing device; and controlling operation of the electrical device according to the at least one of the preset information or the operation parameter information. The preset information is preset information broadcast by an electronic tag on a preset object within the preset range of the electrical device. After the electronic tag broadcasts the preset information, the preset information is received by a base station and sent to the edge computing device by the base station. The operation parameter information is determined according to the preset information.

Abstract: A method and a system for recommending a target garment matching an inputted garment. The method includes: extracting attributes from text description and image of the inputted garment to obtain extracted attributes; querying a knowledge graph using the extracted attributes to obtain matched attributes; retrieving candidate products from a garment pool using the matched attributes; extracting features from the inputted garment and the candidate products; determining the target garment from the candidate products based on grading scores between the features of the inputted garment and the features of the candidate products; and recommending the target garment. The knowledge graph includes nodes corresponding to type of clothes, category of clothes, attribute keys, values of attribute keys, context keys, values of context keys, combination of the values of the attribute keys and the type of clothes, and combination of the value of the attribute keys and the category of clothes.

Abstract: An oil well cement settlement stabilizer is ternary cement settlement stabilizer or quaternary cement settlement stabilizer; wherein the quaternary cement settlement stabilizer containing structural units A represented by formula (I), structural units B represented by formula (II), structural units C represented by formula (III), and structural units D represented by formula (IV); Wherein the ternary cement settlement stabilizer containing structural units A represented by formula (I), structural units B represented by formula (II), and structural units D represented by formula (IV);

Abstract: An oil well cement settlement stabilizer is ternary cement settlement stabilizer or quaternary cement settlement stabilizer; wherein the quaternary cement settlement stabilizer containing structural units A represented by formula (I), structural units B represented by formula (II), structural units C represented by formula (III), and structural units D represented by formula (IV); Wherein the ternary cement settlement stabilizer containing structural units A represented by formula (I), structural units B represented by formula (II), and structural units D represented by formula (IV);