Abstract: Disclosed are a refrigerator cooling system and a method for defrosting a refrigerator. The refrigerator cooling system includes a refrigerant circulation flow path provided with a compressor, a condenser, a throttling device and an evaporator. The throttling device has a throttling working mode for cooling and a defrosting working mode not used for cooling. The throttling working mode and the defrosting working mode are switched with each other. The condenser has a first heat release mode corresponding to the throttling working mode and a second heat release mode corresponding to the defrosting working mode, and a heat release amount of a refrigerant flowing through the condenser in the second heat release mode is lower than a heat release amount of the refrigerant flowing through the condenser in the first heat release mode.

Abstract: A method, apparatus and device used to search for content, and a computer-readable storage medium, which relate to the field of data processing. In the method, in response to receiving a search request for a target search term, obtain multiple historical search records related to multiple historical search requests, each historical search record comprising the historical search term targeted by the corresponding historical search request. Then, determine a first historical search record matching the target search term from the multiple historical search records. Furthermore, based on the relationship between multiple historical search records, determine from the multiple historical search records a second historical search record associated with the first historical search record. The method further comprises determining an extended result for the target search term on the basis of the search result corresponding to the second historical search record.

Abstract: Disclosed are a refrigerator cooling system and a method for defrosting a refrigerator. The refrigerator cooling system includes a refrigerant circulation flow path provided with a compressor, a condenser, a throttling device and an evaporator. The evaporator includes a heat exchange core tube including a main inlet, a main outlet and at least one middle inlet. The refrigerant circulation flow path includes a first flow path section. The defrosting branch is connected among the exhaust port of the compressor, the main inlet and the middle inlet. The switching device is for switching the defrosting branch to communicate the exhaust port of the compressor with at least one of the main inlet and the middle inlet, and is further for switching the first flow path section to be communicated.

Abstract: Disclosed are a refrigerator cooling system and a method for defrosting a refrigerator. The refrigerator cooling system includes a refrigerant circulation flow path provided with a compressor, a condenser, a throttling device and an evaporator. The throttling device has a throttling working mode for cooling and a defrosting working mode not used for cooling. The throttling working mode and the defrosting working mode are switched with each other. The condenser has a first heat release mode corresponding to the throttling working mode and a second heat release mode corresponding to the defrosting working mode, and a heat release amount of a refrigerant flowing through the condenser in the second heat release mode is lower than a heat release amount of the refrigerant flowing through the condenser in the first heat release mode.

Abstract: A method, apparatus and device used to search for content, and a computer-readable storage medium, which relate to the field of data processing. In the method, in response to receiving a search request for a target search term, obtain multiple historical search records related to multiple historical search requests, each historical search record comprising the historical search term targeted by the corresponding historical search request. Then, determine a first historical search record matching the target search term from the multiple historical search records. Furthermore, based on the relationship between multiple historical search records, determine from the multiple historical search records a second historical search record associated with the first historical search record. The method further comprises determining an extended result for the target search term on the basis of the search result corresponding to the second historical search record.

Abstract: A motor rotor includes an iron core. A mounting groove is recessed from an end surface of the iron core and extends in a direction from a middle of the iron core to an outer peripheral surface of the iron core. The motor rotor further includes a first magnet and a second magnet embedded in the mounting groove and arranged at an interval along an extension direction of the mounting groove. The first magnet is fixed at a radial outer side of the second magnet. A magnetization direction of each of the first magnet and the second magnet is perpendicular to the extension direction of the mounting groove. A coercive force of the first magnet being greater than a coercive force of the second magnet.

Abstract: Provided are a method and an apparatus for facial image processing, a computer device and a medium. The method for facial image processing includes acquiring a facial image to be optimized of a target user, acquiring a reference facial image matched with the facial image to be optimized from a preset face database, and optimizing the facial image to be optimized according to the reference facial image.

Abstract: A splicing method and splicing system are described for HTTP live streaming media fragmentation.

Abstract: A method and apparatus are provided for downloading a file which are applied in a mobile multimedia broadcast system. The method includes: a client displaying broadcast information to a user for the user selecting a file to be downloaded; the client receiving a selection of the user to the file to be downloaded, reading the broadcast information of the file to be downloaded which is selected by the user, and downloading the file to be downloaded locally when a broadcast start time included in the broadcast information of the file to be downloaded arrives. The method and apparatus can make a user complete the file downloading without manual intervention when using a mobile multimedia broadcast service, thereby saving a mass of manual operations of the user and improving service experience of the user.

Abstract: The invention provides a vector encoding a derivative of EBNA-1 that is not cytotoxic when expressed efficiently in cells, which supports extrachromosomal replication, maintenance and transcription from extrachromosomal oriP containing vectors but does not substantially activate transcription from host cell genes. Also provided is a vector having oriP and encoding a derivative of EBNA-1. The vectors of the invention may be employed in vitro and in gene therapy.

Abstract: The invention provides a vector encoding a derivative of EBNA-1 that is not cytotoxic when expressed efficiently in cells, which supports extrachromosomal replication, maintenance and transcription from extrachromosomal oriP containing vectors but does not substantially activate transcription from host cell genes. Also provided is a vector having oriP and encoding a derivative of EBNA-1. The vectors of the invention may be employed in vitro and in gene therapy.