Abstract: The invention provides a continuous preparation method of 2,3,3,3-tetrafluoropropene, comprising the following steps: carrying out liquid-phase catalytic telomerization reaction on ethylene and carbon tetrachloride serving as initial raw materials in the presence of a composite catalyst to obtain a reaction product; performing two-stage membrane separation and purification on the reaction product, and then sequentially performing a primary high-temperature cracking reaction, a gas-phase chlorination reaction, a secondary high-temperature cracking reaction, a primary gas-phase catalytic fluorination reaction and a secondary gas-phase catalytic fluorination reaction to obtain a reaction product; condensing and rectifying the secondary gas-phase catalytic fluorination reaction product to obtain the 2,3,3,3-tetrafluoropropene product.

Abstract: The present disclosure relates to systems and methods for operation retry. The system may determine whether a retry is allowed for a target operation based on a retry strategy included in a retry proxy component. In response to determining that the retry is allowed for the target operation, the system may execute the target operation. The system may detect whether there is an exception associated with the execution of the target operation. In response to determining that there is the exception associated with the execution of the target operation, the system may determine whether a retry is needed for the target operation based on the retry strategy. In response to determining that the retry is unneeded for the target operation, the system may stop the target operation.

Abstract: The present invention provides a Dendrobium officinale (D. officinale) endophytic fungus strain and an extracellular polysaccharide produced thereby as well as an extraction method and application of the extracellular polysaccharide. The extraction process of the extracellular polysaccharide includes: activating a strain; culturing seed liquid; fermenting and culturing; filtering the fermented liquid under vacuum; concentrated the filtrate under vacuum; conducting alcohol precipitation on the concentrated liquid; precipitating and centrifuging; dialyzing after dissolving the precipitates in water; freezing and drying the dialysate under vacuum; and obtaining the extracellular polysaccharide. The D. officinale endophytic fungus strain belongs to Fusarium solani, and the extracellular polysaccharide produced thereby has inhibitory effects on Escherichia coli, Staphylococcus aureus, Salmonella ssp., and Bacillus subtilis.

Abstract: The present disclosure relates to systems and methods for operation retry. The system may determine whether a retry is allowed for a target operation based on a retry strategy included in a retry proxy component. In response to determining that the retry is allowed for the target operation, the system may execute the target operation. The system may detect whether there is an exception associated with the execution of the target operation. In response to determining that there is the exception associated with the execution of the target operation, the system may determine whether a retry is needed for the target operation based on the retry strategy. In response to determining that the retry is unneeded for the target operation, the system may stop the target operation.

Abstract: A system includes a storage medium storing a set of instructions and at least one processor in communication with the storage medium. When executing the instructions, the at least one processor is configured to cause the system to divide an area into a plurality of sub-areas; acquire service information related to at least one service item in each sub-area; determine at least one tag associated with the sub-area based on the service information; determine a target sub-area associated with the terminal device based on the location information of the terminal device; recommend one or more service items in the target sub-area based on the at least one tag associated with the target sub-area; and transmit one or more pieces of service information related to the one or more service items to be presented on the terminal device.

Abstract: The present invention disclosed a transmission line with a foldable bracket, comprising: a first connector (1), a second connector (2), a wire body (3), and a support member (4); wherein the first connector (1) and the second connector (2) are connected through the wire body (3); the support member (4) comprises a connecting portion (5) and a supporting portion (6), the connecting portion (5) is disposed on the first connector (1) and pivoted to the first connector (1) rotatably, wherein the supporting portion (6) can rotate around the pivot. As a result, when an electronic mobile device needs to be propped up, the support member (4) of the transmission line can be opened to form a stable triangle structure between an edge of the electronic mobile device and the support member (4), to prop up the electronic mobile device.

Abstract: The present invention provides a Dendrobium officinale (D. officinale) endophytic fungus strain and an extracellular polysaccharide produced thereby as well as an extraction method and application of the extracellular polysaccharide. The extraction process of the extracellular polysaccharide includes: activating a strain; culturing seed liquid; fermenting and culturing; filtering the fermented liquid under vacuum; concentrated the filtrate under vacuum; conducting alcohol precipitation on the concentrated liquid; precipitating and centrifuging; dialyzing after dissolving the precipitates in water; freezing and drying the dialysate under vacuum; and obtaining the extracellular polysaccharide. The D. officinale endophytic fungus strain belongs to Fusarium solani, and the extracellular polysaccharide produced thereby has inhibitory effects on Escherichia coli, Staphylococcus aureus, Salmonella ssp., and Bacillus subtilis.

Abstract: The present disclosure relates to systems and methods for vehicle value evaluation. The systems may perform the methods to identify a mobile terminal; obtain target information associated with the mobile terminal and a target vehicle associated with the mobile terminal; determine a current estimated value of the target vehicle based on the target information; and send the current estimated value of the target vehicle to the mobile terminal.

Abstract: The present invention disclosed a transmission line with a foldable bracket, comprising: a first connector (1), a second connector (2), a wire body (3), and a support member (4); wherein the first connector (1) and the second connector (2) are connected through the wire body (3); the support member (4) comprises a connecting portion (5) and a supporting portion (6), the connecting portion (5) is disposed on the first connector (1) and pivoted to the first connector (1) rotatably, wherein the supporting portion (6) can rotate around the pivot. As a result, when an electronic mobile device needs to be propped up, the support member (4) of the transmission line can be opened to form a stable triangle structure between an edge of the electronic mobile device and the support member (4), to prop up the electronic mobile device.

Abstract: A method for determining a current usage state of an earphone that includes a speaker and an air pressure sensor. The method obtains a pressure signal from the air pressure sensor that indicates air pressure proximate to the earphone, the air pressure sensor produces the pressure signal in response to the earphone being inserted into an ear of a user. The method processes the obtained pressure signal to determine that the earphone is in a state of use, and in response, performs at least one of (1) outputting an audio signal through the speaker signifying that the earphone is in use (2) establishing a wireless connection with a media playback device to exchange data between the earphone and the media playback device, or combination thereof.

Abstract: A hybrid system and method for delivering “streaming” media within the home. According to the method, small portions of media items from a controlling device are received at a rendering device for pre-caching into a cache. Upon a user selecting a media item for playback, play of the media item is immediately started from the cache in real-time while the remaining portions of the selected media item are downloaded from the controlling device and appended to cache at a rate faster than real-time.

Abstract: A hybrid system and method for delivering “streaming” media within the home. According to the method, small portions of media items from a controlling device are received at a rendering device for pre-caching into a cache. Upon a user selecting a media item for playback, play of the media item is immediately started from the cache in real-time while the remaining portions of the selected media item are downloaded from the controlling device and appended to cache at a rate faster than real-time.

Abstract: The present invention is related to an apparatus for paperless transfer printing, which includes a printer and a heat transfer printing machine, the printer is connected and assembled with the heat transfer printing machine by an endless metal foil belt, the heat transfer printing machine includes at least a heating transfer printing roller, or a weight bearing crawler belt, or a weight bearing plate the heating transfer printing roller can absorb the belt of metal foil by negative pressure of vacuum or by magnetic means, which result in the close fitting of the belt to the surface of the heating transfer printing roller. The paperless heating transfer printing apparatus also includes a heating device to heat the belt of the metal foil. A set process of printing is also proposed in this invention, which used said apparatus.

Abstract: The present invention is related to an apparatus for paperless transfer printing, which includes a printer and a heat transfer printing machine, the printer is connected and assembled with the heat transfer printing machine by an endless metal foil belt, the heat transfer printing machine includes at least a heating transfer printing roller, or a weight bearing crawler belt, or a weight bearing plate the heating transfer printing roller can absorb the belt of metal foil by negative pressure of vacuum or by magnetic means, which result in the close fitting of the belt to the surface of the heating transfer printing roller. The paperless heating transfer printing apparatus also includes a heating device to heat the belt of the metal foil. A set process of printing is also proposed in this invention, which used said apparatus.