Abstract: Disclosed are a phenyl amino sodium propionate derivative, a preparation method therefor and an application thereof. Specifically, disclosed are sodium 3-(4-(2-(9H-carbazole-9-yl)ethoxy)phenyl)-2-((2-(4-(4-(2-sodium forrnate-2-((2-(4-fluorobenzoyl)phenyl)amino)ethyl)phenoxy)benzoyl)phenyl)amino)propionate, a preparation method therefor and the use thereof for quality control of a bulk drug or formulation of Chiglitazar or a derivative thereof. Particularly, the compound can be used as a control substance or standard substance for the detection of impurities/related substances in Chiglitazar or a sodium salt drug thereof.

Abstract: A method is for analyzing the correlation between different line loss actions, which records, for each individual to which line loss actions occur, all the line loss actions that occur to the individual; and counts, based on two categorization manners: by individual and by line loss action, line loss actions recorded in the database, to obtain line loss action counting results corresponding to respective categorization manners; then, based on the two counting results, collects respective multi-line loss action sequences; and acquires probability data as a data source for probability calculation, to obtain line loss action occurrence conditional probabilities for different line loss actions, so that a targeted a targeted loss reduction plan can be formulated.

Abstract: Method and device for network connection download are provided. The method includes: creating, by a terminal device, at least one backup pre-allocated connection; and before a pre-allocated connection is used, performing a corresponding network initialization operation to allow the terminal device, while downloading a file, to select the pre-allocated connection needed for downloading the file directly from the at least one backup pre-allocated connection, thereby obviating the need to re-perform the corresponding network initialization operation.

Abstract: A method is for analyzing the correlation between different line loss actions, which records, for each individual to which line loss actions occur, all the line loss actions that occur to the individual; and counts, based on two categorization manners: by individual and by line loss action, line loss actions recorded in the database, to obtain line loss action counting results corresponding to respective categorization manners; then, based on the two counting results, collects respective multi-line loss action sequences; and acquires probability data as a data source for probability calculation, to obtain line loss action occurrence conditional probabilities for different line loss actions, so that a targeted a targeted loss reduction plan can be formulated.

Abstract: Method and device for network connection download are provided. The method includes: creating, by a terminal device, at least one backup pre-allocated connection; and before a pre-allocated connection is used, performing a corresponding network initialization operation to allow the terminal device, while downloading a file, to select the pre-allocated connection needed for downloading the file directly from the at least one backup pre-allocated connection, thereby obviating the need to re-perform the corresponding network initialization operation.