Abstract: A material band riveting device includes a feeding structure, a riveting structure and a material pulling structure. The riveting structure is disposed to one end of the feeding structure. The riveting structure has a riveting mold, a plurality of locating pins, two first riveting pins, two second riveting pins and two pressing blocks. The plurality of the locating pins are partially disposed in the riveting mold. The two first riveting pins are partially disposed in the riveting mold. Each first riveting pin has a first riveting portion. The two second riveting pins are partially disposed in the riveting mold. Each second riveting pin has a second riveting portion. The material pulling structure is disposed under the feeding structure.

Abstract: Embodiments of this application provide a voice call method and apparatus, and relate to the field of terminal technologies. The method includes: obtaining, by the first terminal device, azimuth information between the first terminal device and the second terminal device based on location information and orientation information of the first terminal device and location information of the second terminal device; and processing, by the first terminal device, a voice signal from the second terminal device based on the azimuth information to obtain a first-channel voice signal and a second-channel voice signal. Then, a first headphone may play the first-channel voice signal and the second-channel voice signal in a first channel and a second channel, respectively. In this way, a user can sense an azimuth status of a peer end during a voice call based on voice fed back by a headphone.

Abstract: A method, system and computer readable storage medium for controlling a state of accounts. In one aspect, the method uses a data structure storing a plurality of transactions representing the state of accounts. The method comprises receiving a request by a node of a plurality of nodes to create a transaction and determining a type of the transaction based on the request. The determined type of the transaction is used to determine whether to add the transaction to a data structure storing a plurality of transactions representing a state of accounts. In response to determining that the transaction is to be added to the data structure, storing the transaction in the data structure based on the determined type to control the state of accounts. The transaction may by stored in the data structure using a link corresponding to the determined type. The determined type corresponds to a type from a plurality of types comprising a retractable transaction and a non-retractable transaction.

Abstract: A method for creating a configuration knowledge base, includes: determining a hierarchical structure between a plurality of modules in a product family based on the plurality of modules; determining a knowledge package of each module based on the hierarchical structure; and releasing the knowledge package of each module in the product family to a configuration knowledge base, to obtain a configuration knowledge base of the product family. The hierarchical structure indicates a hierarchical relationship between a parent module and a child module in the plurality of modules. Each parent module includes one or more child modules. A knowledge package of the parent module includes an input interface algorithm of the child module associated with the parent module.

Abstract: The present invention provides a method and an apparatus for detecting unmanned aerial vehicle conflict based on an airspace digital raster, and a storage medium, wherein the method comprises: establishing an airspace discrete subdivision raster model; constructing a conversion relationship between a raster code rule and longitude and latitude coordinates and grid codes; establishing an unmanned aerial vehicle safety protection area, and performing gridding expression on the unmanned aerial vehicle in the airspace; establishing a coordinate system to convert the grid codes of the unmanned aerial vehicle into coordinates; calculating the Minkowski difference set of two blocks using the GJK algorithm; and determining whether the unmanned aerial vehicle conflicts or not according to the Minkowski difference set.

Abstract: A conveyor belt lifting mechanism which includes an L-shaped arm, a telescopic arm, and a supporting shaft and an online operation and maintenance robot for a pipe belt conveyor are provided. One end of the L-shaped arm is rotatable, an axial direction of a rotating shaft is parallel to a conveying direction of a conveyor belt, the telescopic arm is slidably connected to the other end of the L-shaped arm, and the telescopic arm extends and retracts in an extension direction of the L-shaped arm. A universal rotary driving portion is connected to an end of the telescopic arm, the supporting shaft is fixed to an output end of the universal rotary driving portion, and two supporting rollers are arranged on the supporting shaft. An included angle between rotating shafts of the two supporting rollers is the same as that between two adjacent idlers in the pipe belt conveyor.

Abstract: The application relates to an anti-back-transfer intake structure of a rotating detonation combustion chamber including a Tesla valve communicating with the rotating detonation combustion chamber and arranged at an inlet of the rotating detonation combustion chamber. The Tesla valve includes a casing and a flow passage, the casing is coaxially connected with an outer wall of the rotating detonation combustion chamber, the flow passage is arranged in the casing, and the flow passage has an inlet end for introducing air, and an outlet end connected with an annular passage of the rotating detonation combustion chamber.

Abstract: Embodiments of this application provide a voice call method and apparatus, and relate to the field of terminal technologies. The method includes: obtaining, by the first terminal device, azimuth information between the first terminal device and the second terminal device based on location information and orientation information of the first terminal device and location information of the second terminal device; and processing, by the first terminal device, a voice signal from the second terminal device based on the azimuth information to obtain a first-channel voice signal and a second-channel voice signal. Then, a first headphone may play the first-channel voice signal and the second-channel voice signal in a first channel and a second channel, respectively. In this way, a user can sense an azimuth status of a peer end during a voice call based on voice fed back by a headphone.

Abstract: The application relates to an anti-back-transfer intake structure of a rotating detonation combustion chamber including a Tesla valve communicating with the rotating detonation combustion chamber and arranged at an inlet of the rotating detonation combustion chamber. The Tesla valve includes a casing and a flow passage, the casing is coaxially connected with an outer wall of the rotating detonation combustion chamber, the flow passage is arranged in the casing, and the flow passage has an inlet end for introducing air, and an outlet end connected with an annular passage of the rotating detonation combustion chamber.

Abstract: An electrochemical apparatus includes a battery management system, a battery unit, and a switch unit. The switch unit is electrically connected between the battery management system and the battery unit. The battery management system is configured to obtain a state of charge of the battery unit; and under a condition that the state of charge is less than a preset threshold and the electrochemical apparatus has not obtained a charging current transmitted by an external charging device, the battery management system outputs a first signal to the switch unit, and the switch unit switches off an electrical connection between the battery unit and the battery management system according to the first signal.

Abstract: A method and an apparatus for analyzing heart rate Variability (HRV), and use thereof are provided. A low-cost, portable and wearable signal acquisition device is utilized to acquire electrocardiography (ECG) signals of epilepsy patients for 24 hours before treatment, and a time domain index, a frequency domain index and a nonlinear index of the ECG during a long term and during a short term are calculated with a programmed HRV analysis method, and the efficacy of vagus nerve stimulation (VNS) treatment for patients with medically intractable epilepsy is accurately and efficiently predicted based on characteristic parameters for characterizing an effect level of the vagus nerve regulating the heart rate, i.e., vagus nerve activity, thereby avoiding unnecessary costs and avoiding the delay of the optimal treatment timing. In addition, the characteristic parameters obtained by the HRV analysis on the ECG may be utilized to clearly select VNS treatment indication patients.

Abstract: The application relates to an assembly for controlling detonation wave mode of a rotating detonation combustion chamber, which includes an inner barrel, an outer plate and at least one sectoral direction-changing block. The outer plate is sleeved outside the inner barrel. An annular cavity is formed between the outer plate and the inner barrel. At least one groove is arranged on one side of the outer plate close to the inner barrel. The groove wall comprises an arc edge and a straight edge. The groove is connected with the annular cavity. The sectoral direction-changing blocks are arranged in the grooves in one-to-one correspondence. An arc edge of the sectoral direction-changing block is positioned far away from the inner barrel.

Abstract: Disclosed is a computer implemented method, system and computer readable medium for performing blockchain-based identity management for a supply chain of a computerised network. In one aspect, the method includes receiving, by a computerised device of a party, an identity issuing transaction initiated by a computerised component or service being in the supply chain, the identity issuing transaction being indicative of a name of the computerised component or service, an identity issuing request message, and a first random number obtained from a distributed database, wherein the identity issuing transaction is initiated by the computerised component or service in response to determining the party is an authoritative party recorded in the blockchain and permitted to issue an identity, invoking a first smart contract, and executing an identity issuance logic of the first smart contract.

Abstract: The present invention relates to an IPv6 wireless sensor network node mobility management method based on RPL routing protocol. The present invention achieves the following: first, placing an RSSI in an ACK frame so as to detect the mobile state of a node and improve the accuracy of mobile detection; second, on the premise of compatibility with an original RPL routing protocol, improving the options for DIS and DAO in selecting the optimal parent node and updating a routing table; and finally, designing a cache method to prevent messages sent to the mobile node from being lost in the process of moving, and designing a new 6LoWPAN header so as to complete message caching.

Abstract: The application relates to an anti-back-transfer intake structure of a rotating detonation combustion chamber including a Tesla valve communicating with the rotating detonation combustion chamber and arranged at an inlet of the rotating detonation combustion chamber. The Tesla valve includes a casing and a flow passage, the casing is coaxially connected with an outer wall of the rotating detonation combustion chamber, the flow passage is arranged in the casing, and the flow passage has an inlet end for introducing air, and an outlet end connected with an annular passage of the rotating detonation combustion chamber.

Abstract: The application relates to a mode control flow channel structure of a rotating detonation combustion chamber, which includes an inner barrel, an outer plate and at least one sectoral direction-changing block. The outer plate is sleeved outside the inner barrel. An annular cavity is formed between the outer plate and the inner barrel. At least one groove is arranged on one side of the outer plate close to the inner barrel. The groove wall comprises an arc edge and a straight edge. The groove is connected with the annular cavity. The sectoral direction-changing blocks are arranged in the grooves in one-to-one correspondence. An arc edge of the sectoral direction-changing block is positioned far away from the inner barrel.

Abstract: Copy and scan printing may include scanning, by scanner disposed along a paper path between a paper delivery roller and a paper pickup roller, content of documents (302). Further, copy and scan printing may include determining whether the documents are to be copied (304), in response to a determination that the documents are to be copied, determining whether a page count of the documents to be copied is available (306), and generating copies of the documents (310).

Abstract: A multiplier is configured to implement a binary single-multiplication operation A[m1-1:0]×B[m2-1:0], or an accumulated sum operation of 2N binary multiplications A0[m3-1:0]×B0[m4-1:0]. The multiplier includes P precoders, Q groups of fusion coders, and a compressor. The P precoders and the Q groups of fusion coders are configured to code a first value and a second value in the single-multiplication operation or the multi-multiplication accumulated sum operation, and output a plurality of partial products to the compressor. The compressor may be configured to compress the plurality of partial products corresponding to the single-multiplication operation or the multi-multiplication accumulated sum operation to obtain two accumulated values.

Abstract: A modeling method for screening surgical patients, used in analysis modeling for heart rate variability (HRV). Low-cost, portable and wearable signal acquisition equipment is utilized to acquire an electrocardiography (ECG) signal of an epileptic 24 hours before surgery; a multiscale entropy (MSE) of the ECG is calculated by means of a programmed HRV analysis method, wherein characteristic parameters representing heart rate complexity are extracted on the basis of an MSE curve, and a medical refractory epileptic suitable for vagus nerve stimulation (VNS) surgery is accurately and efficiently screened, thus avoiding unnecessary expenditures and avoiding delaying an optimal opportunity for treatment. Meanwhile, the curative effects of the VNS treatment may be wholly improved by means of clearly selecting VNS surgical indication patients according to the characteristic parameters of the MSE complexity of the ECG.