Abstract: Provided are catechol nanoparticles, catechol protein nanoparticles, and a preparation method and use thereof. The method includes: adding a tannin compound-containing natural herb medicine into water to obtain a mixture, and subjecting the mixture to heating reflux extraction to obtain a herb medicine extract and subjecting the herb medicine extract to fractionation to obtain the catechol nanoparticles.

Abstract: A method, a device and a medium for acquiring logging parameters are provided, wherein the logging parameters include gas-bearing porosities, and the method includes: acquiring a two-dimensional nuclear magnetic logging analysis graph; determining a gas-bearing region from the two-dimensional nuclear magnetic logging analysis graph; and summing contour values of the gas-bearing region as a gas-bearing porosity. The device for acquiring logging parameters includes a processor and a computer readable storage medium, wherein instructions are stored in the computer readable storage medium, and the processor executes the instructions to perform the foregoing method for acquiring logging parameters. The medium for acquiring logging parameters stores computer executable instructions, which are used for executing the foregoing method for acquiring logging parameters.

Abstract: A smart acoustic information recognition-based welded weld impact quality determination method and system, comprising: controlling a tip of an ultrasonic impact gun (1) to perform impact treatment on a welded weld with different treatment pressures, treatment speeds, treatment angles and impact frequencies, obtaining acoustic signals during the impact treatment, calculating feature values of the acoustic signals, and constructing an acoustic signal sample set including various stress conditions; marking the acoustic signal sample set according to impact treatment quality assessment results for the welded weld; establishing a multi-weight neural network model, and using the marked acoustic signal sample set to train the multi-weight neural network model; obtaining feature values of welded weld impact treatment acoustic signals to be determined, inputting the feature values into the trained multi-weight neural network model, and outputting determination results for welded weld impact treatment quality to be det

Abstract: Embodiments of the present disclosure provide a sintering device and a pressure sintering mechanism with a controllable atmosphere thereof. The pressure sintering mechanism with the controllable atmosphere includes: a telescopic tube, wherein at least a part of the telescopic tube is an elastically telescopic bellows section; two pressure components arranged opposite to each other, wherein the telescopic tube is configured between the two pressure components, the two pressure components are configured to seal an opening of an end of the telescopic tube when the two pressure components are close to each other to form a sealed sintering chamber inside the telescopic tube and apply pressure to a product inside the sintering chamber; and a heating component configured to heat the product inside the sintering chamber.

Abstract: A construction method of a fine-grained infectious disease simulation model is disclosed. The construction method includes: obtaining a population movement flow between multiple target regions within a predetermined time period; dividing the predetermined time period into multiple time periods based on a time mode; dividing the multiple target regions into multiple spatial nodes based on a spatial mode; and constructing a simulation model according to the population movement flow, the multiple time periods, and the multiple spatial nodes. By the method, the dynamic modeling of the development of infectious diseases is completed; the sub model modeling under different time modes is completed; and the fine-grained modeling under different spatial modes is completed.

Abstract: Disclosed are a gas showerhead, a method of manufacturing the same, and a plasma apparatus provided with the gas showerhead. The gas showerhead comprises a back plate and a gas distribution plate, the gas distribution plate including a plurality of annular gas distribution regions with the center of the gas distribution plate as their center; on each annular gas distribution region are provided a plurality of gas through-holes penetrating through the gas inlet face and the gas outlet face, the gas through-holes at least including a plurality of first gas through-holes inclined at a certain angle, and the gas through-holes further include a plurality of second gas through-holes, the second gas through-holes being parallel to the central axis or having a radial inclination direction different from the first gas through-holes; and in the same annular gas distribution region, gas flowing out of the first gas through-holes and gas flowing out of the second gas through-holes are kept away from each other.

Abstract: A method and system for distributed machine learning and model training are disclosed. In particular, a finite asynchronous parallel training scheme is described. The finite asynchronous parallel training takes advantage of the benefits of both asynchronous parallel training and synchronous parallel training. The computation delays in various distributed computation nodes are further considered when training parameter are updated during each round of iterative training. The disclosed method and system facilities increase of model training speed and efficiency.

Abstract: This application discloses a method to train a decision tree model. The method is performed by a training system. The training system includes N processing subnodes and a main processing node, N being a positive integer greater than 1. The method includes separately obtaining, by each processing subnode for a currently being trained tree node, a node training feature set and gradient data of the currently being trained tree node; separately determining, by each of the processing subnode, a local splitting rule for the currently being trained tree node according to the node training feature set and the gradient data that are obtained, and transmitting the local splitting rule to the main processing node; and selecting, by the main processing node, a splitting rule corresponding to the currently being trained tree node from the local splitting rule determined by each of the processing subnode.

Abstract: Disclosed are a gas showerhead, a method of manufacturing the same, and a plasma apparatus provided with the gas showerhead.

Abstract: The present disclosure discloses a method and an apparatus for displaying online transaction information. The method includes: displaying a first transaction information page on a terminal; sending first order information based on the first transaction information display page by a terminal to a server; sending first payment information by a server to the terminal in response to the first order information; and displaying a second transaction information display page including the first order information and the first payment information. The first order information is modifiable on the first and the second transaction information display page. The first payment information includes a plurality of payment platform identifiers from which a user can select to complete the online transaction.

Abstract: A method and system for distributed machine learning and model training are disclosed. In particular, a finite asynchronous parallel training scheme is described. The finite asynchronous parallel training takes advantage of the benefits of both asynchronous parallel training and synchronous parallel training. The computation delays in various distributed computation nodes are further considered when training parameter are updated during each round of iterative training. The disclosed method and system facilities increase of model training speed and efficiency.

Abstract: The present disclosure discloses a method, a device, and a system for updating authenticating information in the field of Internet technologies. The method comprises: receiving a service processing request containing user information and service object information; extracting according to the user information, first authentication information associated with the service object information from prestored authentication information; authenticating the first authentication information; displaying an information update interface when the first authentication information fails to be authenticated; obtaining second authentication information from the information update interface; replacing the first authentication information with the second authentication information; authenticating the second authentication information; and processing the service processing request if the second authentication information is authenticated.

Abstract: The present disclosure discloses a method and an apparatus for displaying online transaction information. The method includes: displaying a first transaction information page on a terminal; sending first order information based on the first transaction information display page by a terminal to a server; sending first payment information by a server to the terminal in response to the first order information; and displaying a second transaction information display page including the first order information and the first payment information. The first order information is modifiable on the first and the second transaction information display page. The first payment information includes a plurality of payment platform identifiers from which a user can select to complete the online transaction.

Abstract: The present disclosure discloses a method, a device, and a system for updating authenticating information in the field of Internet technologies. The method comprises: receiving a service processing request containing user information and service object information; extracting according to the user information, first authentication information associated with the service object information from prestored authentication information; authenticating the first authentication information; displaying an information update interface when the first authentication information fails to be authenticated; obtaining second authentication information from the information update interface; replacing the first authentication information with the second authentication information; authenticating the second authentication information; and processing the service processing request if the second authentication information is authenticated.

Abstract: A server with processor(s) and memory receives a transaction request from a first device to perform a transaction with an account and determines a security level for the transaction. When the security level satisfies predetermined criterion, the server: instructs the first device to suspend the transaction and to display a first interface indicating the suspended transaction; and sends a confirmation request, to a second device associated with the account, for voice verification of the transaction. The server receives voice verification information from the second device that includes audio data provided by a user of the second device and determines whether the voice verification information matches stored account verification data corresponding to the account. When there is a match, the server: processes the transaction; and instructs the first device to complete the transaction and to replace display of the first interface with a second interface indicating the completed transaction.

Abstract: The present invention concerns a method and a system for data transmission and control based on Universal Serial Bus (USB). The system comprises a USB Master device and a USB Slave device. The USB Master device comprises a USB Master processor and a Data Storage connected to the USB Master processor. The Slave device comprises a USB Slave processor and a Data Consumer connected to the USB Slave processor. The USB Master processor is coupled with the USB Slave processor via a USB cable. The USB Master processor accepts requests from the USB Slave processor and reads data in the Data Storage connected to it, and then the data is sent to the USB Slave processor via the USB cable, and the USB Slave processor processes the data and transfers them to the Data Consumer for use.

Abstract: The present invention concerns a method and a system for data transmission and control based on Universal Serial Bus (USB). The system comprises a USB Master device and a USB Slave device. The USB Master device comprises a USB Master processor and a Data Storage connected to the USB Master processor. The Slave device comprises a USB Slave processor and a Data Consumer connected to the USB Slave processor. The USB Master processor is coupled with the USB Slave processor via a USB cable. The USB Master processor accepts requests from the USB Slave processor and reads data in the Data Storage connected to it, and then the data is sent to the USB Slave processor via the USB cable, and the USB Slave processor processes the data and transfers them to the Data Consumer for use.