Abstract: Disclosed are a visualization grouting device for coal and rock fissures and a test method, a test device including a visualization fissure grouting box body, a box body bracket, a grouting device and a monitoring device. A bottom plate is divided into four identical areas, rubber cushion blocks with different specifications are arranged to simulate different fissure widths and tortuosity, artificial protolith thin film is pasted inside, and a grouting hole and a plurality of pressure measuring holes are arranged in the center of the upper top plate. In the present disclosure, the grouting process of fissures under different grouting conditions, such as different fissure widths, roughness, grouting resistance and tortuosity of pore channels can be simulated, the grouting under different fissure conditions can be simultaneously simulated, and the differences of different grouting diffusion forms can be clearly and intuitively analyzed and compared through the visualization box body.

Abstract: A dustproof structure for a laser output window of a laser includes a discharge chamber, a gas purifier, a dust prevention pipeline, and a fan. A cavity is provided between the laser output window and a slit. The dust prevention pipeline includes a gas inlet end connected to the gas purifier, a middle part passing through the cavity, and a gas outlet end connected to the fan. At least a portion of a working gas purified by the gas purifier flows through the dust prevention pipeline to the cavity. The fan guides the working gas so as to increase a flow rate of the gas passing through the cavity, thereby strengthening the blowing of the clean gas on the laser output window and effectively preventing dust particles in the working gas from approaching and contaminating the laser output window.

Abstract: A quick electrical-connecting structure for a high-voltage high-frequency pulse environment relates to the technical field of high-voltage high-frequency electrical engineering. The quick electrical-connecting structure includes a plug, a socket, and a cable, where the cable is connected to the socket through the plug; the plug and the socket internally enclose an annular cavity surrounding the cable; and a protective fluid is filled in the annular cavity. By charging a protective fluid to the annular cavity in the plug and the socket, a high-intensity insulating fluid protective layer is maintained around a connecting position of the cable in the annular cavity. Therefore, the quick electrical-connecting structure lowers an internal humidity, and can effectively reduce corona discharge and creepage.

Abstract: Disclosed in the present invention are an excimer laser energy model identification method and apparatus. The method comprises the following steps: establishing a gated recurrent network for excimer laser energy model identification; within a plurality of preset time periods, setting energy collection conditions in a single laser pulse mode, and collecting a training data set for excimer laser energy model identification; and using the training data set to train the established gated recurrent network, and when a training termination condition is satisfied, ending the training and obtaining an excimer laser energy model. By means of the method provided by the present invention, the maximum error between a pulse energy generated by the identified excimer laser energy model and an actual pulse energy is less than 1.5%, and thus, a simulation requirement of excimer laser energy characteristic control can be met.

Abstract: A method for estimating the shape and pose of a body includes obtaining an image of the body, extracting image features, and transforming the image features to a set of parameter values describing the body's shape and pose using a transformer comprising a cascade of transformer units, wherein each transformer unit operates on a representation of a respective version of the set of parameter values and modifies the representation of the respective version of the set of parameter values by the image features weighted by an attention of the respective version of the set of parameter values to the image features in sequence with a self-attention layer modifying the representation of the respective version of the set of parameter values by components of the representation of parameter values weighted by an attention between the components of the representation of the respective version of the set of parameter values to themselves.

Abstract: A method and apparatus for depth estimation of a monocular image, and a storage medium are provided. The method includes: obtaining, through a depth estimation neural network, a global feature of a monocular image according to absolute features of preset regions and relative features among the preset regions in the monocular image; and obtaining a predicted depth map of the monocular image according to the global feature, and the absolute features of preset regions and relative features among the preset regions in the monocular image.

Abstract: A method for image processing comprises: acquiring first, second, third, and fourth optical flow maps of t-th to (t?1)-th frame images, t-th to (t+1)-th frame images, (t+1)-th to t-th frame images, and (t+1)-th to (t+2)-th frame images, respectively, wherein t is an integer; determining first and second interpolation optical flow maps according to the first and second optical flow maps, and the third and fourth optical flow maps, respectively; determining a first interpolation frame image according to the first interpolation optical flow map and the t-th frame image, and a second interpolation frame image according to the second interpolation optical flow map and the (t+1)-th frame image; and fusing the first and second interpolation frame images to obtain an interpolation frame image to be interpolated between the t-th and (t+1)-th frame images. The embodiment of the present disclosure is capable of improving the accuracy of the obtained interpolation frame image.

Abstract: A video processing method includes: a convolution parameter corresponding to a frame to be processed in a video sequence is acquired, the convolution parameter including a sampling point of a deformable convolution kernel and a weight of the sampling point; and denoising processing is performed on the frame to be processed based on the sampling point of the deformable convolution kernel and the weight of the sampling point to obtain a denoised video frame.

Abstract: A multilayer wind spring for a display support and a lifting support thereof, the multilayer wind spring is formed by winding a plurality of tightly attached elastic metal sheets, wherein each of the elastic metal sheets comprises a stretching connection portion, a movable sheet portion and an unmovable wound portion, part or all of the elastic metal sheets are provided with a semi-restricted structure which is provided to have a movement allowance in an unwinding or winding direction of the elastic metal sheets, and in an unwinding or winding process of the multilayer wind spring, the stretching connection portion of the elastic metal sheets provided with the semi-restricted structure is arranged to be slidable within a range of the movement allowance relative to a connected component.

Abstract: A multilayer wind spring for a display support and a lifting support thereof, the multilayer wind spring is formed by winding a plurality of tightly attached elastic metal sheets, wherein each of the elastic metal sheets comprises a stretching connection portion, a movable sheet portion and an unmovable wound portion, part or all of the elastic metal sheets are provided with a semi-restricted structure which is provided to have a movement allowance in an unwinding or winding direction of the elastic metal sheets, and in an unwinding or winding process of the multilayer wind spring, the stretching connection portion of the elastic metal sheets provided with the semi-restricted structure is arranged to be slidable within a range of the movement allowance relative to a connected component.

Abstract: A method and apparatus for depth estimation of a monocular image, and a storage medium are provided. The method includes: obtaining, through a depth estimation neural network, a global feature of a monocular image according to absolute features of preset regions and relative features among the preset regions in the monocular image; and obtaining a predicted depth map of the monocular image according to the global feature, and the absolute features of preset regions and relative features among the preset regions in the monocular image.

Abstract: A multilayer wind spring for a display support and a lifting support thereof, the multilayer wind spring is formed by tightly attaching and winding multiple elastic metal sheets, each of the elastic metal sheets comprises: a stretching connection portion which is not involved in winding and unwinding and is always kept in an initial state, a movable sheet portion which is involved in winding and unwinding, and an unmovable wound portion which is not involved in stretching and is always kept in a wound state, the stretching connection portion, the movable sheet portion, and the unmovable wound portion are formed integrally and sequentially arranged in an unwinding direction, and the elastic metal sheets of the unmovable wound portions are arranged fixedly relative to one another.

Abstract: A method for preparing a two-dimensional sheet-shaped Cu-MOF material, includes mixing Cu-BTC with an alkaline solution at a certain solid-liquid ratio by stirring, reacting at a temperature of 25 to 120° C., filtering, washing with ionized water and drying under vacuum, to obtain a two-dimensional sheet-shaped Cu-MOF material, wherein the alkaline solution is at least one of urea, sodium carbonate, sodium bicarbonate, aqueous ammonia, sodium hydroxide or potassium hydroxide. The method has the characteristics of mild operation conditions, controllable transition process, high reaction yield and easy production at large scale, and exhibits excellent oxidation performance in styrene oxidation.

Abstract: A multilayer wind spring for a display support and a lifting support thereof, the multilayer wind spring is formed by tightly attaching and winding multiple elastic metal sheets, each of the elastic metal sheets comprises: a stretching connection portion which is not involved in winding and unwinding and is always kept in an initial state, a movable sheet portion which is involved in winding and unwinding, and an unmovable wound portion which is not involved in stretching and is always kept in a wound state, the stretching connection portion, the movable sheet portion, and the unmovable wound portion are formed integrally and sequentially arranged in an unwinding direction, and the elastic metal sheets of the unmovable wound portions are arranged fixedly relative to one another.

Abstract: Disclosed is a clean method for preparing layered double hydroxides (LDHs), in which hydroxides of different metals are used as starting materials for production of LDHs by atom-economical reactions. The atom efficiency of the reaction is 100% in each case because all the atoms of the reactants are converted into the target product since only M2+(OH)2, M3+(OH)3, and CO2 or HnAn? are used, without any NaOH or other materials. Since there is no by-product, filtration or washing process is unnecessary. The consequent reduction in water consumption is also beneficial to the environment.

Abstract: Disclosed is a clean method for preparing layered double hydroxides (LDHs), in which hydroxides of different metals are used as starting materials for production of LDHs by atom-economical reactions. The atom efficiency of the reaction is 100% in each case because all the atoms of the reactants are converted into the target product since only M2+(OH)2, M3+(OH)3, and CO2 or HnAn? are used, without any NaOH or other materials. Since there is no by-product, filtration or washing process is unnecessary. The consequent reduction in water consumption is also beneficial to the environment.