Abstract: Methods, systems, and computer-readable media for distributed canary testing with test artifact caching are disclosed. Using one or more storage components, a test client stores one or more software artifacts for testing of a software product. The client initiates a first test of the software product using the software artifact(s) stored in the storage component(s). In the first test, the client sends a first set of requests to the software product at a first point in time. The client initiates a second test of the software product using the software artifact(s) stored in the storage component(s). In the second test, the client sends a second set of requests to the software product at a second point in time. The software artifact(s) are maintained in the storage component(s) between the first point in time and the second point in time.

Abstract: The present disclosure relates to a signal conditioning system for improving low-frequency measurement performance of an acceleration sensor. The signal conditioning system includes: a charge integration circuit, a high-pass filter circuit, a lead-lag network, an anti-aliasing filter circuit, and a gain adjustment circuit. An input terminal of the charge integration circuit is connected to the acceleration sensor, an output terminal of the charge integration circuit is connected to an input terminal of the high-pass filter circuit, an output terminal of the high-pass filter circuit is connected to an input terminal of the lead-lag network, an output terminal of the lead-lag network is connected to an input terminal of the anti-aliasing filter circuit, and an output terminal of the anti-aliasing filter circuit is connected to an input terminal of the gain adjustment circuit.

Abstract: The present disclosure provides a single-degree-of-freedom (SDOF) magnetic damping shock absorber based on an eddy current effect, comprising a lower plate, a ring-shaped magnet a, a ring-shaped magnet b, an aluminum cylinder, a bottom copper sheet, a copper sheet, a top copper sheet, a bearing seat, a linear bearing, a bearing end cap, a load, a piston shaft, a stepped shaft, a fixed collar, a coil spring, a lower clamping shaft, and fixing screws. When the shock absorber is working, the ring-shaped magnet a keeps stationary at the lower end and the ring-shaped magnet b reciprocates in the vertical direction. Both magnets are arranged in a mutual attraction manner. Under the action of a time-varying electromagnetic field generated by the relative movement of the ring-shaped magnet b, the copper sheet arranged between the two ring-shaped magnets generates eddy current damping. The movement of the ring-shaped magnet b is inhibited.

Abstract: The present disclosure discloses a method for identifying a M1 generation plant mutant resulting from physical and chemical mutagenesis, a method for acquiring the plant mutant, a mutant gene, and use thereof. The method for identifying a M1 generation plant mutant resulting from physical and chemical mutagenesis includes: mutagenizing a plant to obtain an M1 generation plant mutant, extracting a mixed pool of DNA from the obtained M1 generation plant mutant, subjecting the mixed pool of DNA to high-depth targeted sequencing for a target gene region, and aligning a sequencing result with the target gene region to identify whether there are target single nucleotide polymorphisms (SNPs) and/or Indel. The method of the present disclosure has high efficiency and high accuracy, involves simple operations, and is of progressive significance for the identification and acquisition of innovative germplasms.

Abstract: Disclosed is a self-powered vibration damper based on piezoelectricity and a control method. The damper comprises a loading platform, an energy collecting mechanism, a curved leaf spring, a vibration control mechanism and a substrate all connected in sequence, the circuit system comprises a rectifier circuit, a DC-DC voltage conversion circuit, an energy storage circuit, a control circuit and a charging battery, a first piezoelectric stack is connected with the input end of the rectifier circuit, the output end of the rectifier circuit is connected with the input end of the DC-DC voltage conversion circuit, the output end of the DC-DC voltage conversion circuit is connected with the input ends of the energy storage circuit and the charging battery, the output end of the energy storage circuit is connected with the input end of the control circuit, the output end of the control circuit is connected with the second piezoelectric stack.

Abstract: An electromagnetic-piezoelectric composite vibration control device based on a synchronized switch damping technology is provided. An upper guiding component is installed inside the upper rigid frame, a lower guiding component is installed inside a lower rigid component, a guide rod is nested inside the upper guiding component and the lower guiding component, an upper idler wheel mechanism and a lower idler wheel mechanism are fixedly sleeved on the guide rod and are positioned between the upper guiding component and the lower guiding component respectively, an electromagnetic mechanism is fixedly sleeved outside the guide rod, one end of each piezoelectric cantilever beam is fixed between the upper rigid frame and the lower rigid frame, the other end is arranged between the upper idler wheel mechanism and the lower idler wheel mechanism, and the piezoelectric cantilever beams and the electromagnetic mechanism are connected with a circuit system respectively.

Abstract: A method for generating a sample image includes: obtaining an initial image size of an initial image; obtaining a plurality of reference images by processing the initial image based on different reference processing modes; obtaining an image to be processed by fusing the plurality of reference images; and determining a target sample image from images to be processed based on the initial image size.

Abstract: The present disclosure discloses a Stewart vibration isolation platform with Macro Fiber Composite (MFC) plates. The vibration isolation platform includes: an upper load platform, a lower foundation platform, a controller, and a plurality of single-leg vibration isolation unit groups arranged between the upper load platform and the lower foundation platform. Each of the single-leg vibration isolation unit groups includes two single-leg vibration isolation units. The single-leg vibration isolation unit includes a first diaphragm spring and a second diaphragm spring. An MFC actuator and an MFC sensor are respectively arranged on two sides of the first diaphragm spring and the second diaphragm spring. The MFC actuators and the MFC sensors are all connected to the controller.

Abstract: A shoe energy collecting device includes a shell, a piezoelectric assembly, an elastic component, a magnet array, a base, a supporting block, an upper friction assembly and a lower friction assembly. The shell includes a supporting shell and a plastic shell connected in sequence. The base is provided below the supporting block in the supporting shell, the lower friction assembly is provided between the supporting block and the base. The upper friction assembly is provided on an inner wall of a top surface of the plastic shell. A coil is provided on a lower surface of the lower friction assembly at a side of the plastic shell, and the magnet array is provided below the coil. The piezoelectric assembly is provided in the plastic shell, the elastic component is provided on a side wall of the plastic shell away from the supporting block, and connected with the piezoelectric assembly.

Abstract: Methods, systems, and computer-readable media for creation of software tests matching production personas are disclosed. A software testing system determines a plurality of observations regarding execution of a software product in a production environment comprising a plurality of software products. The software testing system determines one or more personas based at least in part on analysis of the plurality of observations. A particular persona represents one or more usage characteristics shared by a subset of clients of the software product. The software testing system generates one or more tests associated with the particular persona. The one or more tests comprise one or more input values of a plurality of calls. The one or more input values represent the usage characteristics shared by the subset of clients of the software product.

Abstract: Provided is a method for identifying authenticity and origin of Panax quinquefolius based on terahertz spectroscopy. The time domain spectral information of the Panax quinquefolius sample is obtained, and converted into the frequency domain spectral information by Fourier transform to calculate a terahertz absorption spectrum. The identification is performed by observing whether there are characteristic absorption peaks of pseudoginsenoside F11 in the terahertz absorption spectrum.

Abstract: A method and system for controlling multi-unmanned surface vessel (USV) collaborative search are disclosed which relate to the technical field of the marine intelligent USV collaborative operation. The method includes determining a task region of a USV team; determining environmental perception information corresponding to each of the USVs at the current moment according to the task region and the probability graph mode; inputting the environmental perception information corresponding to each of the USVs at the current moment into the corresponding target search strategy output model respectively to obtain an execution action of each of the USVs at the next moment; sending the execution action of each of the USVs at the next moment to a corresponding USV execution structure to search for underwater targets within the task region. The target search strategy output model is obtained by training based on a training sample and a DDQN network structure.

Abstract: A control method and system for collaborative interception by multiple unmanned surface vessels are provided. The method includes obtaining task environment information of each unmanned surface vessel in an unmanned surface vessel group at a current moment, estimating interception point information of the intruding target at the current moment by using a Kalman filter according to the task environment information of the unmanned surface vessels at the current moment, determining process state information of each unmanned surface vessel at the current moment, inputting the process state information of each unmanned surface vessel at the current moment into a corresponding intruding target interception policy output model respectively to obtain an execution action of each unmanned surface vessel at a next moment to intercept the intruding target. The application can intercept the intruding target accurately.

Abstract: A triboelectric nanogeneration module, and a combined wind turbine and a method thereof. The triboelectric nanogeneration module includes a rotating disc, and moving friction plates and fixed friction plates that are oppositely arranged outside the radial direction of the rotating disc. A nano-friction material layer is arranged on the surface of each of the moving friction plates and the fixed friction plates. Driving devices are arranged on the rotating disc in the circumferential direction at intervals. The driving devices are used for extruding the moving friction plates to move to the positions at which the moving friction plates are in contact with the fixed friction plates. The moving friction plates are connected to reset devices used for separating the moving friction plates from the fixed friction plates. The moving friction plates perform straight reciprocating movement under the action of the driving devices and the reset devices.

Abstract: The present disclosure discloses a piezoelectric self-powered combination beam vibration damper and a control method thereof. An upper guiding component is installed inside an upper rigid frame, a lower guiding component is installed inside a lower rigid component, a guide rod is nested inside the upper guiding component and the lower guiding component, an upper elastic component is sleeved outside the upper idler wheel mechanism, a lower elastic component is sleeved outside the lower idler wheel mechanism, one end of each piezoelectric cantilever beam is fixed between the upper rigid frame and the lower rigid frame, the other end of each piezoelectric cantilever beam is arranged between the upper idler wheel mechanism and the lower idler wheel mechanism, at least one piezoelectric cantilever beam is connected with the input end of a circuit system, and other piezoelectric cantilever beams are connected with the output end of the circuit system.

Abstract: An ocean energy collection device is provided. The device includes a first friction assembly, a second friction assembly, and a gravity center adjustment assembly disposed in sequence from outside to inside, and a control and energy storage assembly arranged on the gravity center adjustment assembly. The first friction assembly includes a spherical housing, a first electrode layer, and a first friction layer which are disposed in sequence from outside to inside. The second friction assembly includes a tumbler-shaped shell, a second electrode layer, and a second friction layer which are disposed in sequence from inside to outside. The gravity center adjustment assembly is fixed in the tumbler-shaped shell. The first friction assembly and the second friction assembly can realize electrification by friction. The first electrode layer, the second electrode layer, and the gravity center adjustment assembly are connected with the control and energy storage assembly.

Abstract: A shoe energy collecting device includes a shell, a piezoelectric assembly, an elastic component, a magnet array, a base, a supporting block, an upper friction assembly and a lower friction assembly. The shell includes a supporting shell and a plastic shell connected in sequence. The base is provided below the supporting block in the supporting shell, the lower friction assembly is provided between the supporting block and the base. The upper friction assembly is provided on an inner wall of a top surface of the plastic shell. A coil is provided on a lower surface of the lower friction assembly at a side of the plastic shell, and the magnet array is provided below the coil. The piezoelectric assembly is provided in the plastic shell, the elastic component is provided on a side wall of the plastic shell away from the supporting block, and connected with the piezoelectric assembly.

Abstract: Disclosed is a method for qualitative and quantitative determination of key substances in mixture based on terahertz spectrum. Terahertz spectrum of a reference mixture is trained through an SVR algorithm, and predicting parameters of key substances in the mixture to be determined after a model is generated. According to the method, an initial pure spectrum corresponding to each composition in the mixture does not need to be separately determined, no limitation on the number of samples contained in the mixture, and no limitation on frequency range to be determined, and the proportion requirement of the mixture in the early test stage is not limited, and the SVR model does not need to be re-trained after a database is formed in the later stage, and the result can be obtained immediately after the spectrum of item to be determined is introduced into the algorithm model.

Abstract: A first apparatus obtains first information, where the first information includes information about a road and/or information about an object on the road, and the object on the road includes a vehicle and/or a pedestrian on the road. The first apparatus determines a driving behavior of the first apparatus based on the first information and a capability of the first apparatus. Even if the capability of the first apparatus cannot be used to process complete information of the first information, the first apparatus can still determine the driving behavior of the first apparatus based on a part of information in the first information. This resolves a problem that a capability of an apparatus cannot fully match road side information. According to the technical solution, apparatuses with different capabilities can cooperate with different roads with different capabilities, to improve travel efficiency and safety.

Abstract: The disclosure provides a method for detecting a change of a building, an apparatus for detecting a change of a building, an electronic device, a storage medium and a computer program product. The method includes: obtaining a remote-sensing image sequence of a to-be-detected region; obtaining a building probability map corresponding to each remote-sensing image in the remote-sensing image sequence; determining a sub-region located by each building in the to-be-detected region based on the building probability map corresponding to each remote-sensing image; for each building, determining an existence probability of the building in each remote-sensing image based on the sub-region located by the building and the building probability map corresponding to each remote-sensing image; and determining a change condition of the building based on the existence probability of the building in each remote-sensing image.