Abstract: Disclosed is a flame brazing control method for copper-aluminum welding, characterized by using a flame generated from the combustion of natural gas, air and oxygen as the heat source, the molar flow ratio of natural gas, air and oxygen is controlled within a range of 1:10-22:0.3-2.2. Further disclosed is an automatic brazing apparatus for copper-aluminum welding, characterized by using a flame generated from the combustion of natural gas, air and oxygen as the heat source, includes three gas delivery systems for natural gas, air and oxygen, a mixer for mixing the three gas, and integrated flow controllers for the electromagnetic valves and flow valves in the three gas delivery systems.

Abstract: Systems, apparatuses, and methods are described for generating unique identifiers. Identifiers may be organized or grouped by different topics. Identifiers may be requested, generated, stored as groups, and may be allocated from those groups based on requests for identifiers to improve the efficiency of one or more computing devices or systems. The size of each group of identifiers may be adjusted.

Abstract: A combined platform for testing fireproof materials for cables includes a main frame for providing operating space; an air circulation system including a fresh air supply unit for supplying fresh air into the operating space and an exhaust gas treatment unit for treating the gas in the operating space under set conditions; an open flame system for providing an open flame for testing cables; a water circulation system for supplying water at least to the exhaust gas treatment unit and the operating space; and a control system for collecting at least the temperature and gas concentration in the operating space, and performing process control based on the collected results. The actual working conditions of scenarios such as fire-resistant cable tunnels and fire-resistant cable trenches can be simulated, and multiple tests such as combustion performance test and physical and chemical performance test can be carried out under various working conditions.

Abstract: The present disclosure provides an N protein epitope mutation marker for preparing an epitope deletion-marked vaccine strain of type II porcine reproductive and respiratory syndrome virus (PRRSV) and use thereof, belonging to the technical field of biological products. In the mutation marker, one or more amino acids are mutated based on an epitope sequence at positions 92 to 103 of a C-terminal of an N protein of the type II PRRSV; and the epitope mutation marker has an amino acid sequence shown in SEQ ID NO: 1, where X1 is selected from the group consisting of T, P, and A; and X2 is selected from the group consisting of V and A.

Abstract: An electric vehicle thermal management system and method based on a self-circulating gas-liquid phase change cold plate are disclosed. A top cover, a first heat exchanger, a battery case partition and a battery case bottom plate are arranged in sequence from top to bottom, a top heat exchanging chamber is formed between an upper heat exchanging surface of the first heat exchanger and the top cover; the battery case partition is of a square wave-like structure, a working medium chamber is formed between a top of the battery case partition and a lower heat exchanging surface of the first heat exchanger, the working medium chamber is filled with a gas-liquid phase change working medium, and a plurality of battery chambers are formed between the bottom of the battery case partition and the battery case bottom plate.

Abstract: Disclosed are a device and method for detecting defects of a high-voltage cable cross-bonded grounding system. The method comprises: selecting a protective grounding box of a cross-bonded grounding system, respectively connecting a signal excitation coupler to A-phase, B-phase and C-phase coaxial cables of the protective grounding box, selecting a stable signal with a frequency different from a power frequency or a field interference frequency, and testing effective current values and phases responded by the A-phase, B-phase and C-phase coaxial cables when the stable signal with the frequency F1 is injected into the A-phase, B-phase and C-phase coaxial cables of the protective grounding box in a coupled manner; and obtaining resistances and inductances of branch circuits of the cable cross-bonded grounding system by calculation according to measurement data, and determining if the cable cross-bonded grounding system has a connection defect.

Abstract: Disclosed is a massive data-driven method for automatically locating a mine microseismic source, including: constructing a microseismic wave calibration data set by using a large-scale seismic data set containing seismic signals and non-seismic signals; constructing a pre-training calibration model based on a full convolution neural network through deep learning of a seismic wave calibration data set; using microseismic data of mine sites for transfer learning of an initial arrival time calibration model to construct an arrival time automatic calibration model suitable for mine microseismic signals; and automatically as well as accurately locating mine microseismic events based on an isokinetic homogeneous isotropic velocity model by using an optimization algorithm to deduce arrival time errors and through repeated iteration and fine-tuning.

Abstract: A double-channel fluid injection apparatus includes a main shaft, a bearing box, and a sealing box. The main shaft includes an outer tube and an inner tube. An internal channel of the inner tube and a vertical through channel constitute a first fluid passageway. The inner tube and the outer tube form an annular gap, and a channel D is radially formed at a lower part of the outer tube and is in communication with the annular gap, thus constituting a second fluid passageway. The bearing box is mounted on a boss of the outer tube. The sealing box includes a sealing cylinder fixedly connected to a lower end of a lower end cap of the bearing box. A channel E in communication with the second fluid passageway is radially formed at a position of the sealing cylinder corresponding to the channel of the outer tube.

Abstract: A file system and a file storage method operate in relation to a large-capacity optical disc library. The method includes receiving a file access request initiated by an application or a user and finding a file directory tree according to a file identifier and determining that a file corresponding to the file identifier is stored in a temporary storage or an optical disc library. If the file is stored in the temporary storage, the corresponding file in the temporary storage is opened according to a virtual address recorded in the file directory tree to complete corresponding access operation. If the file is not found in the file directory tree, the file is created in the temporary storage. The file system and the file storage method can implement the full automation of optical disc recording and reading and provide users with a general file access interface.

Abstract: The method includes receiving communication signals in a time domain and to aa frequency domain, providing resource blocks in the frequency domain including a first and second resource block, selecting first pilot signals from first resource block and second pilot signals from second resource block, calculating a first average value based on the first pilot signals, calculating a second average value, determining a phase difference between the first and second pilot signals using the first and second average values, adjusting a first phase of first resource block using the phase difference, providing a first waveform using the first resource block with adjusted the first phase and the second resource block, applying a smoothing filter against the first waveform to generate a second waveform, generating a third waveform using at least the first and third set of phase and amplitude differences, and converting third waveform from frequency domain to time domain.

Abstract: A mobile communication method based on a mobile communication terminal is provided, wherein a communication unit of the mobile communication terminal is adapted to working in at least two communication modes, and an antenna assembly of the mobile communication terminal is adapted to selectively working in different communication modes or in a combination of different communication modes. The method includes: selecting, based on a communication mode and a service type of the mobile communication terminal, a coupling relationship between the antenna assembly and the communication unit, so that the mobile communication terminal can work in various working modes; and if the communication mode and/or the service type of the mobile communication terminal changes, adjusting the coupling relationship between the antenna assembly and the communication unit based on the change. The mobile communication terminal using the method has characteristics of small size, low cost and less difficulty to design.

Abstract: An arrangement and a method for controlling a plurality of light emitting diodes which are connected in series to attain uniform distribution of a total current to several series connections, LED chains, connected in parallel to each other wherein circuitry-related expenditure and power losses occurring during the control process are minimized, include a first reference voltage generating unit and a second reference voltage generating unit, wherein a outlet of the first reference voltage generating unit is connected to a first and a second control circuit, and an outlet of the second reference voltage generating unit is connected to the second and the first control circuit, and an outlet of the first control circuit is connected to a control inlet of the first controllable semiconductor switch, and an outlet of the second control circuit is connected to a control inlet of the second controllable semiconductor switch.

Abstract: A method for asymmetrically scheduling buffer cache of disk array. The method including: (1) detecting whether access from a upper layer is hit in a buffer cache, proceeding to (7) if yes, and proceeding to (2) if no; (2) detecting whether the buffer cache is full, proceeding to (3) if yes, and proceeding to (5) if no; (3) detecting whether the number of pages of a sacrificial disk is greater than a threshold, proceeding to (4) if yes, and proceeding to (6) if no; (4) selecting and replacing a cold page of the sacrificial disk; (5) buffering data requested by a user in a blank page in the buffer cache; (6) selecting and replacing all cold pages of the buffer cache; and (7) reading or writing the data, and changing positions or status thereof in pages of the buffer cache.

Abstract: An arrangement and a method for controlling a plurality of light emitting diodes which are connected in series to attain uniform distribution of a total current to several series connections, LED chains, connected in parallel to each other wherein circuitry-related expenditure and power losses occurring during the control process are minimized, include a first reference voltage generating unit and a second reference voltage generating unit, wherein a outlet of the first reference voltage generating unit is connected to a first and a second control circuit, and an outlet of the second reference voltage generating unit is connected to the second and the first control circuit, and an outlet of the first control circuit is connected to a control inlet of the first controllable semiconductor switch, and an outlet of the second control circuit is connected to a control inlet of the second controllable semiconductor switch.

Abstract: A method for asymmetrically scheduling buffer cache of disk array. The method including: (1) detecting whether access from a upper layer is hit in a buffer cache, proceeding to (7) if yes, and proceeding to (2) if no; (2) detecting whether the buffer cache is full, proceeding to (3) if yes, and proceeding to (5) if no; (3) detecting whether the number of pages of a sacrificial disk is greater than a threshold, proceeding to (4) if yes, and proceeding to (6) if no; (4) selecting and replacing a cold page of the sacrificial disk; (5) buffering data requested by a user in a blank page in the buffer cache; (6) selecting and replacing all cold pages of the buffer cache; and (7) reading or writing the data, and changing positions or status thereof in pages of the buffer cache.

Abstract: A method of processing communication signals, is described. The method includes receiving a communication signal in a time domain, converting the communication signal to a frequency domain, providing resource blocks, the resource blocks including a first resource block and a second resource block, the first resource block having a first boundary and a second boundary, the first boundary being adjacent to the second resource block, the second boundary being non-adjacent to other resource blocks, the first resource block including pilot signals, generating a third resource block based on the one or more pilot signals, providing a first waveform based on the resource blocks and the third resource block, applying a smoothing filter against the first waveform to generate a second waveform, and converting the second waveform from the frequency domain to the time domain.

Abstract: The method includes receiving communication signals in a time domain and to a frequency domain, providing resource blocks in the frequency domain including a first and second resource block, selecting first pilot signals from first resource block and second pilot signals from second resource block, calculating a first average value based on the first pilot signals, calculating a second average value, determining a phase difference between the first and second pilot signals using the first and second average values, adjusting a first phase of first resource block using the phase difference, providing a first waveform using the first resource block with adjusted the first phase and the second resource block, applying a smoothing filter against the first waveform to generate a second waveform, generating a third waveform using at least the first and third set of phase and amplitude differences, and converting third waveform from frequency domain to time domain.

Abstract: A method of processing communication signals, is described. The method includes receiving a communication signal in a time domain, converting the communication signal to a frequency domain, providing resource blocks, the resource blocks including a first resource block and a second resource block, the first having a first boundary and a second boundary, the first boundary being adjacent to the second resource block, the second boundary being non-adjacent to other resource blocks, the first resource block including pilot signals, generating a third resource block based on the one or more pilot signals, providing a first waveform based on the resource blocks and the third resource block, applying a smoothing filter against the first waveform to generate a second waveform, generating a third waveform using at least the first and third set of phase and amplitude differences, and converting the third waveform from the frequency domain to the time domain.

Abstract: A mobile communication method based on a mobile communication terminal is provided, wherein a communication unit of the mobile communication terminal is adapted to working in at least two communication modes, and an antenna assembly of the mobile communication terminal is adapted to selectively working in different communication modes or in a combination of different communication modes. The method includes: selecting, based on a communication mode and a service type of the mobile communication terminal, a coupling relationship between the antenna assembly and the communication unit, so that the mobile communication terminal can work in various working modes; and if the communication mode and/or the service type of the mobile communication terminal changes, adjusting the coupling relationship between the antenna assembly and the communication unit based on the change. The mobile communication terminal using the method has characteristics of small size, low cost and less difficulty to design.