Abstract: The present disclosure provides a fiber laser light coherent combination system, comprising: a modulator module configured to perform a phase modulation on sub-beams according to pseudo-random sequences orthogonally independent from each other, and perform a frequency shift on a reference beam according to a set frequency; a fiber laser light amplifier module configured to perform a power amplification on the modulated sub-beams; a laser light collimation emission module configured to collimate and output the sub-beams and the reference beam; a combination sampling module configured to perform a combination of the sub-beams and the reference beam which are collimated and outputted, and convert them into an electrical signal; a digital phase modulation and demodulation module configured to perform a demodulation on the electrical signal according to the shifted frequency and each of the pseudo-random sequences, and obtain a phase difference between each of the sub-beams and the reference beam.

Abstract: A product line testing method includes acquiring identity information of at least one to-be-tested product and identity information of a current testing station; acquiring target testing station information of the at least one to-be-tested product according to the identity information of the at least one to-be-tested product; and comparing the target testing station information with the identity information of the current testing station to generate a comparison result and, according to the comparison result, executing the testing flow of the current testing station or outputting testing prompt information. The technical solutions improve the efficiency of product testing.

Abstract: A negative electrode current collector of a lithium metal battery includes a current collector substrate provided with a plurality of pore channels, a lithium dissolving agent filled in each of the pore channels of the current collector substrate, and a locking layer attached to a pore wall of a corresponding pore channel and located between the pore wall and the lithium dissolving agent. The lithium dissolving agent is a liquid or a gel capable of dissolving lithium metal. The locking layer is configured to constrain the lithium dissolving agent to the corresponding pore channel.

Abstract: A screen sharing method and system and an electronic device are provided. The screen sharing system may include a first electronic device, a second electronic device, a third electronic device, and a fourth electronic device. The third electronic device may be an electronic device near the first electronic device. The fourth electronic device may be an electronic device near the second electronic device. In the method, the first electronic device may establish a video communication connection to the second electronic device. The third electronic device may share a screen of the third electronic device with the second electronic device by using the first electronic device. The second electronic device may display the screen shared by the third electronic device, and may further switch the screen shared by the third electronic device to the fourth electronic device for display.

Abstract: Provided is a bispecific chimeric antigen receptor targeting CD19 and CD22, which comprises extracellular antigen binding domains of heavy-chain variable regions and light-chain variable regions of anti-CD19 and anti-CD22 antibodies. Further provided is a bispecific CAR-T cell targeting CD19 and CD22.

Abstract: A computer-implemented method, medium, and system for global deadlock detection in a hybrid database for transactional and analytical workloads are disclosed. In one computer-implemented method, a daemon is launched on a coordinator segment in a massively parallel processing (MPP) database, where the MPP database is a hybrid database for both transactional workloads and analytical workloads. A respective local wait-for graph for each of a plurality of segments in the MPP database is collected periodically, where each of the plurality of segments includes the coordinator segment or a worker segment of a plurality of worker segments in the MPP database. A global wait-for graph that includes all collected local wait-for graphs is built. The global wait-for graph is used to determine that a global deadlock exists in the MPP database. The global deadlock is broken using one or more predefined policies in response to determining that the global deadlock exists.

Abstract: Present disclosure discloses a display screen module and a display screen, which includes a front panel, a rear panel and a circuit module. The circuit module includes a driving device, a plurality of display assemblies and a substrate located between the front panel and the rear panel. The substrate includes a first mounting plate and second mounting plate which are integrated. The second mounting plate is formed by extension from one end of the first mounting plate along a horizontal direction. Each of the plurality of display assemblies includes a plurality of lamp beads provided at intervals on the substrate along an extension direction of the second mounting plate and facing the front panel. The driving device is arranged on the first mounting plate and partially protrudes from the rear panel. A size of the driving device is less than or equal to a size of the first mounting plate.

Abstract: Present disclosure discloses a display screen module and a display screen, which includes a front panel, a rear panel and a circuit module. The circuit module includes a driving device, a plurality of display assemblies and a substrate located between the front panel and the rear panel. The substrate includes a first mounting plate and second mounting plate which are integrated. The second mounting plate is formed by extension from one end of the first mounting plate along a horizontal direction. Each of the plurality of display assemblies includes a plurality of lamp beads provided at intervals on the substrate along an extension direction of the second mounting plate and facing the front panel. The driving device is arranged on the first mounting plate and partially protrudes from the rear panel. A size of the driving device is less than or equal to a size of the first mounting plate.

Abstract: An abrasive belt grinding device is provided, a supporting plate passes through an inner cylinder, and is fixed to the inner cylinder, the inner cylinder is rotatably connected to an outer cylinder bracket, a winding reel and an unwinding reel are arranged side by side in a left-right direction at an upper end of the supporting plate, and are driven by respective first servo motors, one end of the abrasive belt is wound in a belt groove of the winding reel, and another end of the abrasive belt is wound over the first transition wheel, the first tension pulley, the third transition wheel, the fifth transition wheel, the seventh transition wheel, the contact wheel, the eighth transition wheel, the sixth transition wheel, the fourth transition wheel, the second tension pulley, and the second transition wheel, and is finally wound in a belt groove of the unwinding reel.

Abstract: An abrasive belt grinding center applicable to grinding and polishing of a whole profile of a blisk is provided, an X-axis feed mechanism, a Y-axis feed mechanism, a Z-axis feed mechanism, a B-axis rotation mechanism and a C-axis rotation mechanism constitute a grinding head feed mechanism, and a housing, a drum, a synchronous driven pulley, a synchronous belt, a synchronous driving pulley, and a grinding head rotation driving motor constitute a grinding head rotation mechanism. In the present application, two grinding heads are utilized to reasonably assign the machining angle and the feeding, and rough machining and fine machining can be both realized by one time of clamping, and the combination of six degrees of freedom in space is achieved by a short drive chain, and further the rigidities of a grinding head mechanism and a workpiece clamping mechanism are ensured.

Abstract: An abrasive belt grinding center applicable to grinding and polishing of a whole profile of a blisk is provided, an X-axis feed mechanism, a Y-axis feed mechanism, a Z-axis feed mechanism, a B-axis rotation mechanism and a C-axis rotation mechanism constitute a grinding head feed mechanism, and a housing, a drum, a synchronous driven pulley, a synchronous belt, a synchronous driving pulley, and a grinding head rotation driving motor constitute a grinding head rotation mechanism. In the present application, two grinding heads are utilized to reasonably assign the machining angle and the feeding, and rough machining and fine machining can be both realized by one time of clamping, and the combination of six degrees of freedom in space is achieved by a short drive chain, and further the rigidities of a grinding head mechanism and a workpiece clamping mechanism are ensured.

Abstract: An abrasive belt grinding device is provided, a supporting plate passes through an inner cylinder, and is fixed to the inner cylinder, the inner cylinder is rotatably connected to an outer cylinder bracket, a winding reel and an unwinding reel are arranged side by side in a left-right direction at an upper end of the supporting plate, and are driven by respective first servo motors, one end of the abrasive belt is wound in a belt groove of the winding reel, and another end of the abrasive belt is wound over the first transition wheel, the first tension pulley, the third transition wheel, the fifth transition wheel, the seventh transition wheel, the contact wheel, the eighth transition wheel, the sixth transition wheel, the fourth transition wheel, the second tension pulley, and the second transition wheel, and is finally wound in a belt groove of the unwinding reel.

Abstract: Systems and methods for improving the performance of mobile applications are disclosed. An exemplary method can include receiving a request for the application, where the request can include target device information. The method can also determine whether the application has been cached before. If the application has not been cached, the method can download the application as a bytecode and process the bytecode into the native code format, using an Ahead-of-time compiler. The method can also provide the application in the native code format to the target device over the network.

Abstract: Methods, systems, and media for providing determinism in multithreaded programs are provided. In some embodiments, methods for providing determinism in multithreaded programs are provided, the methods comprising: instrumenting a program with: a proxy that: receives inputs to the program; and determines whether a schedule corresponding to a set of input constraints satisfied by the inputs has been memoized; and a replayer that: if it is determined that a schedule corresponding to a set of input constraints satisfied by the inputs has been memoized, processes the inputs by the program according to the schedule.

Abstract: Systems and methods for improving the performance of mobile applications are disclosed. An exemplary method can include receiving a request for the application, where the request can include target device information. The method can also determine whether the application has been cached before. If the application has not been cached, the method can download the application as a bytecode and process the bytecode into the native code format, using an Ahead-of-time compiler. The method can also provide the application in the native code format to the target device over the network.

Abstract: A data partitioning plan is automatically generated that—given a data-parallel program and a large input dataset, and without having to first run the program on the input dataset—substantially optimizes performance of the distributed execution system that explicitly measures and infers various properties of both data and computation to perform cost estimation and optimization. Estimation may comprise inferring the cost of a candidate data partitioning plan, and optimization may comprise generating an optimal partitioning plan based on the estimated costs of computation and input/output.

Abstract: Methods, systems, and media for protecting applications from races are provided. In some embodiments, methods for protecting applications from races are provided, the methods comprising: adding to at least one cycle of the application an update check to determine when an update to the application is to be made; adding an update engine to the application, wherein the update engine is configured to: receive an update plan that is based on an execution filter that specifies how operations of the application are to be synchronized; and cause synchronization operations to be added to the application based on the update plan that prevent the race from occurring.

Abstract: Methods, systems, and media for protecting applications from races are provided. In some embodiments, methods for protecting applications from races are provided, the methods comprising: adding to at least one cycle of the application an update check to determine when an update to the application is to be made; adding an update engine to the application, wherein the update engine is configured to: receive an update plan that is based on an execution filter that specifies how operations of the application are to be synchronized; and cause synchronization operations to be added to the application based on the update plan that prevent the race from occurring.

Abstract: The disclosed subject matter provides techniques for detecting and diagnosing mobile app bugs. An approximate execution mode screens for potential bugs, which can expose bugs but can generate false positives. From the generated bug reports, certain bugs can be automatically validated and false positives pruned, reducing the need for manual inspection.

Abstract: A data partitioning plan is automatically generated that—given a data-parallel program and a large input dataset, and without having to first run the program on the input dataset—substantially optimizes performance of the distributed execution system that explicitly measures and infers various properties of both data and computation to perform cost estimation and optimization. Estimation may comprise inferring the cost of a candidate data partitioning plan, and optimization may comprise generating an optimal partitioning plan based on the estimated costs of computation and input/output.