Abstract: A sealing device for positioning points in holes of process grouting is provided, which includes an isolation component provided on an anchor cable body. The isolation component is detachably connected to an isolation sleeve through a coupling component, the isolation sleeve can be provided on the anchor cable body to send the isolation component into a corresponding position in a borehole and cooperates with the isolation component to perform a fixed-point isolation on a surrounding rock area in the borehole. A combination of the isolation component and the isolation sleeve sleeved on the anchor cable body is used, and the inflation and expansion of the first and second airbags are used to achieve tight contact with a hole wall, thereby forming effective isolation at specific locations within the borehole, thereby laying a foundation for dynamic grouting in stages and regions. The docking part is provided with an installation groove.

Abstract: In a group chat-based instant messaging method, a message is received from a first messaging application of a first user in a first messaging group. The first messaging application is associated with a first messaging service. When the message is to be announced to all group members of the first messaging group, whether the first user is authorized to send the message is determined based on identity information of the first user. Based on the first user being authorized, protocol conversion on the message is performed based on a second messaging protocol of a second messaging service to output the message in a first preset announcement style for messages announced to all group members. The converted message is transmitted, via a second messaging server, to a second messaging application corresponding to one of the plurality of group members in the first messaging group.

Abstract: A distributed digital certificate implementation is described. Each of n participants generates a respective threshold private key share based on a distributed key generation protocol. Each of at least t+1 of the n participants generates a random value based on an offline-phase protocol. Each of the at least t+1 participants receives a certificate application, and generates a certificate share by signing application information in the certificate application based on an online-phase protocol, the threshold private key share, and the random value generated based on the offline-phase protocol. Any party aggregates at least t+1 signature shares into a total certificate after obtaining the at least t+1 certificate shares.

Abstract: A method for displaying a virtual image of a digital assistant is provided. In this method, the virtual image of the digital assistant includes a plurality of feature objects. After an electronic device obtains a user input, the electronic device generates a corresponding signal instruction, to trigger a change of a form of the virtual image displayed on an interface, so that different working states of the digital assistant are represented by using different forms. In this way, a user determines a current interaction status with the digital assistant based on a change status of a form of the digital assistant, to make interaction between the user and the digital assistant more naturally.

Abstract: A detachable moving snap-fit fastener, comprising: a housing (1); a snap-fit fastener assembly (2), which is arranged in the housing and is at least partially arranged outside the housing to be snap-fitted with the outside; and a rotating member, which is movably connected to the housing and at least partially extends to the snap-fit fastener assembly, wherein the rotating member rotates to drive at least part of the snap-fit fastener assembly to extend out of or retract into the housing.

Abstract: A train operation scenario general simulation method. By means of a Redis lightweight message publishing and subscription mechanism and the high performance of a memory database, database storage access and message communication functions are combined into one, and the execution of simulation scenarios is synchronized in real time while simulating the running state of a train, thus realizing the rapid construction of a train operation simulation system. Compared with the prior art, the present disclosure simplifies the system structure, guarantees the data consistency and high-speed access, optimizes the network communication efficiency, realizes decoupling between applications (system), also avoids the system complexity caused by network isolation and inconsistent development languages, and improves the deployment convenience and operation stability of a simulation system. Further provided are a train operation scenario general simulation system, a device and a medium.

Abstract: In a quantitative detection method of micro-defects through low-frequency ultrasonic multi-resolution scanning imaging, the collected ultrasonic A-type scanning signals are decomposed through split spectrum processing into sub-signals with different center frequencies fi, amplitude imaging is performed on the same sub-signals fi, a defect size di detected by a half of the amplitude of the image is identified, linear fitting is performed on di with fi according to the sound field directivity function, and di corresponding to the slope k=?0.01 of the fitting curve is the quantitative size of the defect.

Abstract: A train operation intelligent dispatching system and method are provided, where the system includes: a data acquisition and control module, configured to collect multi-source data affecting train operation; a data processing module, configured to perform data aggregation on the multi-source data, and process the multi-source data to form multi-source data in a unified data format; a multi-disciplinary data resource pool, configured to perform real-time storage and updating of the multi-source data in the unified data format, and store historical multi-source data; an intelligent fault analysis module, having intelligent fault analysis models therein, configured to perform fault analysis based on the multi-source data to obtain fault analysis results of corresponding disciplinary systems, and output fault advance warnings of corresponding disciplinary systems according to the fault analysis results; and a process preplan module, configured to provide preplan handling processes corresponding one-to-one with ext

Abstract: A fuel cell power generation system and a control method thereof. The system includes ammonia decomposition device, ammonia removal device, fuel cell, first membrane humidifier, second membrane humidifier, first gas-water separator and air compressor, the first membrane humidifier is communicated between the ammonia decomposition device and anode of the fuel cell, the second membrane humidifier is communicated between the air compressor and cathode of the fuel cell, the air compressor is configured to feed compressed air into the cathode of the fuel cell; first outlet of the fuel cell is communicated with the anode of the fuel cell, and second outlet of the fuel cell is communicated with ingress of the first gas-water separator, a first egress of the first gas-water separator is communicated with the first membrane humidifier, and a second egress of the first gas-water separator is communicated with the second membrane humidifier.

Abstract: This application relates to a network voice call method performed by a computer device. The method includes: in response to a call trigger operation triggered by a first communication user in a first instant messaging application, creating a virtual room configured for a network voice call and adding the first communication user to the virtual room; transmitting a child application card indicating the virtual room to a second instant messaging application used by a second communication user; the second instant messaging application and the first instant messaging application being different types of applications; and enabling the first and second communication users to participate in the network voice call in the virtual room by using a network call engine integrated in the first and second instant messaging applications, respectively.

Abstract: A phenolic acids derivative can be used in treating ischemic stroke. Specifically, a compound represented by the following formula (I), or a pharmaceutically acceptable salts thereof, or an optical isomer, a hydrate, a solvate, or a prodrug thereof for can be used in preparing a pharmaceutical composition for the treating and/or relieving ischemic stroke.

Abstract: A method and system of sensitization of cancerous cells in a volume is disclosed. A plasma tube including a pair of electrodes coupled to a power supply is provided. The plasma tube generates a plasma jet between the electrodes. A controller is coupled to a power supply to control a discharge voltage to the electrodes to generate the plasma jet and direct an electro-magnetic field at the volume having cancerous cells and normal cells for a sufficient time to sensitize the cancer cells. A treatment device applies a treatment such as TMZ to the sensitized cancer cells after the cancer cells are sensitized by the electro-magnetic field.

Abstract: A method for implementing distributed key generation in a blockchain by a blockchain node includes: generating n secret shares, retaining a share and respectively encrypting a remaining n?1 secret shares by using keys of receivers, generating a public verification parameter corresponding to a secret share of the blockchain node, generating a zero-knowledge proof indicating that the secret share of the blockchain node and the public verification parameter match, sending the secret share, the public verification parameter, and the zero-knowledge proof to an on-chain contract by using a transaction, verifying, by the on-chain contract based on the zero-knowledge proof, that the encrypted secret share and the public verification parameter match, obtaining, from contract information, a verified secret share corresponding to the blockchain node, performing decryption by using a key of the blockchain node, and calculating a private key share of the blockchain node based on a local secret share.

Abstract: A method for controlling a motion of a multi-jointed bionic dolphin relates to a technical field of damage detection using a bionic robot. The method comprises: constructing a three-dimensional model and a three-dimensional model in computational domain of the multi-jointed bionic dolphin, and performing pre-processing; importing the model file after the pre-processing into analysis software for computational fluid dynamics for the hydrodynamic simulation to obtain a thrust-time curve and a hydrodynamic curve under a specified underwater working condition, then finding a difference, and fitting to obtain velocity-resistance fitting curves; performing a kinetic analysis, and deducing a kinetic model; completing kinetic coupling to obtain kinetic parameters according to the kinetic model, the thrust-time curve, and the velocity-resistance fitting curves; and controlling output torques by a pulse width modulation (PWM) technique.

Abstract: An information insertion method performed by a computer device relates to the field of information processing. The method includes: displaying an editing interface corresponding to an online document; receiving a contact insertion operation in the editing interface; in response to the contact insertion operation, inserting a contact corresponding to a first account into the online document; and displaying the contact corresponding to the first account in the online document, the contact corresponding to the first account providing a communication portal for instant messaging with the first account through the online document.

Abstract: A height measurement device and a height measurement method based on a millimeter-wave radar are provided. The height measurement device comprises a millimeter-wave radar module, a main controller, and a wake-up module. The wake-up module and the millimeter-wave radar module are connected to the main controller, respectively. The wake-up module activates the millimeter-wave radar module through the main controller. The millimeter-wave radar module sends a transmission signal and receives an echo signal, and obtains an intermediate-frequency signal based on the transmission signal and the echo signal. The echo signal is formed by the reflected back transmission signal after it encounters human head. The main controller applies continuous millimeter waves to sweep across the highest point of the human head and obtain height data based on the intermediate-frequency signal.

Abstract: The present disclosure relates to the technical field of automobile part processing, and specifically provides a clamping device and a sandblasting device for automobile part processing. The clamping device comprises a clamping component for clamping an automobile part, and an auxiliary component; the auxiliary component comprises a supporting part, a pull rod, a protective pad, and a return spring, wherein the pull rod is movably provided on the supporting part, one end of the pull rod is connected to the protective pad having deformation performance, and the protective pad is used for being arranged between the automobile part and the clamping component; the return spring is used for being installed between the supporting part and the protective pad; the pull rod is pulled so that the pull rod pulls the protective pad to move towards the direction close to the supporting part.

Abstract: A reference voltage generator circuit includes: a first transistor and a second transistor, wherein the first transistor and the second transistor are coupled with each other and are located on a substrate, wherein the first transistor has a first conduction threshold voltage and a first rated voltage, wherein the second transistor has a second conduction threshold voltage and a second rated voltage, wherein the first rated voltage is higher than the second rated voltage; wherein the reference voltage generator circuit is configured to generate a bandgap reference voltage with temperature compensation according to a difference between the first conduction threshold voltage and the second conduction threshold voltage.

Abstract: Provided are a method and a device for recognizing an ancient book. The method comprises: extracting classification features of a target ancient book image based on a backbone network to obtain backbone classification features; detecting the backbone classification features and determining individual character positions and text line positions included in the target ancient book image; recognizing the individual character positions to obtain content information of individual characters, and predicting the text line positions to obtain a reading order of characters in the text line positions; and arranging, based on a ratio between the individual character positions and the text line positions, the content information of the individual characters following the reading order of the characters in the text line positions to obtain a recognition result of characters in the target ancient book image.