Abstract: The present invention discloses a type of energy-absorbing rock bolt device with umbrella-shaped structure, which consists of a body of bolt, and one end of the said body of bolt is equipped with a preloaded system, as well as the other end of the said body of bolt is equipped with the first support system, in addition, the said body of bolt is equipped with several second support systems, and the said second support system is located between the said preloaded system and the said first support system; meanwhile, the said second support system consists of the first umbrella-shaped support system and the second umbrella support system.

Abstract: Disclosed are a video watermark identification method and apparatus, device, and a storage medium. The method includes: each video frame of multiple video frames of a video is divided into multiple image blocks to obtain an image sequence corresponding to the each video frame; multiple image sequences corresponding to the multiple video frames are input to a target detection model to obtain a classification result of each image block, and a feature vector of the video is obtained according to all classification results of the multiple image blocks; and the feature vector of the video is input to a watermark identification model to obtain a watermark identification probability output by the watermark identification model, and the video containing a watermark is determining in a case where the watermark identification probability is greater than or equal to a probability threshold.

Abstract: The present invention discloses a type of energy-absorbing rock bolt device with umbrella-shaped structure, which consists of a body of bolt, and one end of the said body of bolt is equipped with a preloaded system, as well as the other end of the said body of bolt is equipped with the first support system, in addition, the said body of bolt is equipped with several second support systems, and the said second support system is located between the said preloaded system and the said first support system; meanwhile, the said second support system consists of the first umbrella-shaped support system and the second umbrella support system.

Abstract: Provided is a method for detecting audio, which includes acquiring audio file data; determining attribute detection data corresponding to the audio file data; and generating a voice detection result corresponding to the audio file data by voice violation detection on the attribute detection data by a fully connected network model. A device for detecting audio and a non-transitory computer-readable storage medium are also provided.

Abstract: A rock mass shear test system for high-energy accelerator computed tomography (CT) scanning includes double horizontal loading devices, a first bearing device for bearing a static shear box, a second bearing device for bearing a dynamic shear box, and a normal loading device, etc. In the test, the double horizontal loading devices simultaneously apply an identical loading force to the rock mass, and the normal loading device applies a shear force to the rock mass. The double horizontal loading devices are provided in parallel and spaced apart, a loading force is applied in the horizontal direction, and a shear force is applied in the vertical direction, so that the loading cylinder and the rock mass sample are effectively prevented from interfering with each other during the accurate scanning process of the shearing progressive failure process of the rock mass.

Abstract: A method of detecting angular position sensor offset mar (PSOE) in a permanent magnet synchronous machine operated from a closed-loop field oriented control and controller adapted to detect PSOE in a permanent magnet synchronous machine, includes sensing an electrical parameter of a machine drive current with a sensor from a location on the closed-loop field oriented control and comparing the electrical parameter with machine commands provided to the closed-loop field oriented control. It is determined that a PSOE has occurred from the comparing.

Abstract: An experimental system for simulating the effect of a fault stick-slip displacement on a tunnel engineering includes a model box system and a stick-slip loading system. The model box system is configured to simulate an interaction between two walls of a fault. The stick-slip loading system includes a first loading assembly, a second loading assembly and a bearing assembly. The first loading assembly includes a first loading device, and a first sample frame configured to place a main loading rock mass sample. The bearing assembly is arranged on two sides of the first sample frame. Sub-loading rock mass samples borne by the bearing assembly are configured to abut against the main loading rock mass sample under the action of the second loading assembly. A method for simulating the effect of a fault stick-slip displacement on a tunnel engineering based on the above system is further provided.

Abstract: A shear box for testing cyclic shear characteristics of a rock mass discontinuity includes: an upper shear box including an upper semi-open cavity composed of an upper left side plate, an upper right side plate, an upper front side plate, an upper rear side plate and an upper top plate; and a lower shear box including a lower semi-open cavity composed of a lower left side plate, a lower right side plate, a lower front side plate, a lower rear side plate and a lower bottom plate; the upper shear box includes at least one first adjusting device for adjusting a space size of the upper semi-open cavity; the lower shear box includes at least one second adjusting device for adjusting a space size of the lower semi-open cavity; and the upper shear box and the lower shear box are placed opposite to each other.

Abstract: A shear box for testing cyclic shear characteristics of a rock mass discontinuity includes: an upper shear box including an upper semi-open cavity composed of an upper left side plate, an upper right side plate, an upper front side plate, an upper rear side plate and an upper top plate; and a lower shear box including a lower semi-open cavity composed of a lower left side plate, a lower right side plate, a lower front side plate, a lower rear side plate and a lower bottom plate; the upper shear box includes at least one first adjusting device for adjusting a space size of the upper semi-open cavity; the lower shear box includes at least one second adjusting device for adjusting a space size of the lower semi-open cavity; and the upper shear box and the lower shear box are placed opposite to each other.

Abstract: Method, system, and programs for providing content recommendation are disclosed. A first set of candidate content items may be generated based on a user profile, and a second set of candidate items may be generated based on the likelihood that the user will click a corresponding candidate content item in the second set. The candidate content items in the first and second sets may be ranked together using a learning model and presented to the user as content recommendations based on their rankings. The likelihood that the user will click a given candidate content item in the second set may be estimated based on similarities between the given content item and content items related to the given content item. Such a similarity may be computed based on activities performed by users who have viewed both the given content item and a related content item.

Abstract: A method and apparatus is provided to decompose spectral computed tomography (CT) projection data into material components using singles-counts and total-counts projection data. The singles-counts projection data more accurately solves the material decomposition problem, but can produce multiple results only one of which is correct. The total-counts projection data generates a unique result, but is less precise. The total-counts projection data is used to disambiguate the multiple results of the singles-counts projection data providing a unique results that is also precise.

Abstract: A method and apparatus is provided to calculate scatter using a method to determine primary X-ray flux, first-scatter flux, and multiple-scatter flux using an integral formulation of a radiative transfer equation and using spherical-harmonic expansion. The integral for the primary X-ray flux does not include a spherical-harmonic expansion. The integral for the first-scatter flux includes an angle-dependent scatter cross-section. The integral for the multiple-scatter flux is performed iteratively, includes spherical harmonics, and includes a scatter cross-section expanded using Legendre polynomials. The integrals of attenuation along propagation rays can be accelerated using material decomposition of the attenuation coefficients. An anti-scatter-grid term can be included in the integrals to account for the effects of an anti-scatter grid on the fluxes prior to detection of the X-rays.

Abstract: A computed tomography (CT) method and apparatus including a radiation source configured to produce radiation directed to an object space, and a plurality of detector elements configured to detect the radiation produced from the radiation source through the object space and generate projection data. A rotation mount is configured to rotate the radiation source around the object space. Processing circuitry is configured to cause the rotation mount to rotate the radiation source, and to receive the projection data. The projection data includes a plurality of projection data sets. The processing circuitry calculates a set of weights based on the projection data sets, calculates a set of pre-weights based on the weights, and minimizes a penalized weighted least-squares cost function to produce a reconstructed image. The cost function is a sum of a weighted least-squares term, weighted using the weights, and a penalty term weighted using the pre-weights.

Abstract: An apparatus and method of processing X-ray projection data including spectral computed tomography (CT) projection data. The spectral CT data is decomposed into material projection lengths using a material-decomposition method that includes an initial-estimate method to provide an initial projection-lengths estimate. The initial-estimate method can include first reconstructing an image using non-spectral CT data, and then subdividing the reconstructed image into materials according to the relative attenuation density of areas within the reconstructed image (e.g., high attenuation areas correspond to a high attenuation material such as bone). The projection length estimates of each material are then obtained by forward projecting the corresponding subdivision of the reconstructed image. Also, the initial estimate can be obtained/refined by selecting the projection lengths with smallest cost-function value from randomly chosen projection lengths within a sample space.

Abstract: The present disclosure provides a traffic light for cooperative vehicle-infrastructure and a method for controlling the same. The traffic light for cooperative vehicle-infrastructure includes: a communication module, a central processing module, a Global Positioning System GPS module and a scheduling module. The communication module is configured to receive a set of messages sent by vehicles periodically. The GPS module is configured to locate the position of the traffic light. The central processing module is configured to perform calculations and analyses on the received set of messages and the position of the traffic light, dynamically set lasting times of red and green lamps of the traffic light, and send a control signal carrying the set times to the scheduling module. The scheduling module is configured to control the lasting times of the red and green lamps of traffic light according to the control signal carrying the set times.

Abstract: An apparatus and a method are provided for calculating an output spectrum of a photon-counting detector based on an incident spectrum. The apparatus includes processing circuitry to determine a plane extending from a top face of the photon-counting detector that includes regions that all possible incident rays will transverse; divide the determined plane into subregions; calculate a detector response function for each of the subregions; determine an overall detector response function by summing the calculated detector response function for each of the subregions and normalizing the summation by an area of the determined plane; and calculate the output spectrum based on the overall detector response function and the incident spectrum.

Abstract: The present disclosure provides an information processing method and an information processing system. The information processing method is used for controlling a vehicle door, which includes: detecting an action of a vehicle door controlled by an user and feedbacking the action to a processing module through a detecting module; transmitting a control command to a control module according to the detected action through the processing module; and performing the control command to select at least one vehicle door from all vehicle doors and operate the selected vehicle door through the control module. In the technique scheme of the present disclosure, the processing module transmits the control command to the control module according to the detected action; the control module performs the control command to select at least one vehicle door from all vehicle doors and operate the selected vehicle door, thereby increasing the convenience of operating the vehicle door.

Abstract: According to one embodiment of the present invention, a level of a first hierarchy and a second hierarchy of data attributes is determined where the first hierarchy and the second hierarchy share the determined level and each subordinate hierarchical level. The embodiment further removes from a set of tuples of a database operation at least one tuple that lacks corresponding data in a data source based on the tuple containing elements corresponding to non-intersecting sets of attributes at the determined level. Embodiments of the present invention include a method, system and computer program product for reducing tuple sets in substantially the same manner described above.

Abstract: A method and apparatus is provided to calculate scatter using a method to determine primary X-ray flux, first-scatter flux, and multiple-scatter flux using an integral formulation of a radiative transfer equation and using spherical-harmonic expansion. The integral for the primary X-ray flux does not include a spherical-harmonic expansion. The integral for the first-scatter flux includes an angle-dependent scatter cross-section. The integral for the multiple-scatter flux is performed iteratively, includes spherical harmonics, and includes a scatter cross-section expanded using Legendre polynomials. The integrals of attenuation along propagation rays can be accelerated using material decomposition of the attenuation coefficients. An anti-scatter-grid term can be included in the integrals to account for the effects of an anti-scatter grid on the fluxes prior to detection of the X-rays.