Abstract: A holographic 3D display system based on virtual array splicing of a spatial light modulator includes a laser configured to generate a coherent light beam, first, second and third beam splitters, first and second reflectors, a shutter array, a spatial filter array, a solid lens, first and second light beam deflection elements and a spatial light modulator. The first and second beam splitters and the first reflector are configured to split the light beam generated by the laser into three parallel light beams to irradiate the shutter array. The shutter array is configured to control the three parallel light beams to sequentially pass therethrough according to a set time sequence. The three parallel light beams passing through the shutter array are expanded and collimated by the spatial filter array and the solid lens to form three parallel light beams with the same size and uniform intensity.

Abstract: A tunable-liquid-crystal-grating-based holographic true 3D display system comprises a laser, a filter, a beam expander, a semi-transparent semi-reflective mirror, a spatial light modulator, a lens I, a diaphragm, a tunable liquid crystal grating, a polaroid, a signal controller, a lens II and a receiving screen. The laser, the filter and the beam expander are used for generating collimated incident light. The spatial light modulator is loaded with a hologram of a 3D object. The diaphragm is positioned behind the lens I for eliminating a high-order diffracted light in the holographic true 3D display. The tunable liquid crystal grating is located on the back focal plane of the lens I and on the front focal plane of the lens II, and the signal controller is used for synchronously controlling the voltage of the tunable liquid crystal grating and the generation and loading of the hologram.

Abstract: The present disclosure relates to a method for predicting an amount of water-sealed gas in a high-sulfur water-bearing gas reservoir. The method solves the problem that no method has yet been proposed for predicting the amount of water-sealed gas in a high-sulfur water-bearing gas reservoir. According to the technical solution, the method includes: considering that the volume of the gas reservoir does not change during the production of the constant-volume gas reservoir, deriving, based on a material balance method, a material balance equation of the high-sulfur water-bearing gas reservoir in consideration of water-sealed gas and water-soluble gas, solving and drawing a chart of water-sealed gas in the high-sulfur water-bearing gas reservoir by an iterative algorithm, obtaining a recovery factor of the high-sulfur water-bearing gas reservoir in consideration of water-sealed gas and water-soluble gas, and further obtaining the amount of water-seal gas in the high-sulfur water-bearing gas reservoir.

Abstract: The present application relates to the technical field of 3D printing, and more particularly to a method and a device for placing a 3D model, a computer-readable storage medium, and a 3D printer. The method includes: performing a dimension reduction processing to a first 3D model and a second 3D model, respectively, to obtain a first plane graphics corresponding to the first 3D model and a second plane graphics corresponding to the second 3D model; determining a minimum bounding rectangle of the first plane graphics; determining a convex hull of the second plane graphics, and determining an insertion point in the convex hull; and performing a successive insertion attempt to the minimum bounding rectangle at the insertion point, and determining a final placement position.

Abstract: A tunable-liquid-crystal-grating-based holographic true 3D display system comprises a laser, a filter, a beam expander, a semi-transparent semi-reflective mirror, a spatial light modulator, a lens I, a diaphragm, a tunable liquid crystal grating, a polaroid, a signal controller, a lens II and a receiving screen. The laser, the filter and the beam expander are used for generating collimated incident light. The spatial light modulator is loaded with a hologram of a 3D object. The diaphragm is positioned behind the lens I for eliminating a high-order diffracted light in the holographic true 3D display. The tunable liquid crystal grating is located on the back focal plane of the lens I and on the front focal plane of the lens II, and the signal controller is used for synchronously controlling the voltage of the tunable liquid crystal grating and the generation and loading of the hologram.

Abstract: Various approaches for data storage and retrieval for a computer memory include processing a computational workflow having multiple data-processing steps, generating and storing a first hash value associated with a first step of the data-processing steps based on an input to the first step, generating and storing a second hash value associated with a second step of the data-processing steps based on the generated first hash value, and reconstructing a computational state of the workflow based on the second hash value, and thereby avoid re-execution of a portion of the workflow corresponding to the second hash value.

Abstract: The invention discloses an intelligent water-control and gas-diversion particle for water-gas reservoirs and preparation method and application thereof, comprising core support layer with barbs, expandable water shutoff layer, water discharge and gas diversion layer, migration protection layer and suspension lift layer; the expandable water shutoff layer is wrapped on the outer surface of the core support layer and the root of the barb; the water discharge and gas diversion layer is wrapped on the outer surfaces of the expandable water shutoff layer and the barbs; the migration protection layer is wrapped on the outer surface of the water discharge and gas diversion layer; the outer surface of the migration protection layer forms a sphere; the suspension lift layer is wrapped on the outer surface of the migration protection layer.

Abstract: The invention discloses an intelligent water-control and gas-diversion particle for water-gas reservoirs and preparation method and application thereof, comprising core support layer with barbs, expandable water shutoff layer, water discharge and gas diversion layer, migration protection layer and suspension lift layer; the expandable water shutoff layer is wrapped on the outer surface of the core support layer and the root of the barb; the water discharge and gas diversion layer is wrapped on the outer surfaces of the expandable water shutoff layer and the barbs; the migration protection layer is wrapped on the outer surface of the water discharge and gas diversion layer; the outer surface of the migration protection layer forms a sphere; the suspension lift layer is wrapped on the outer surface of the migration protection layer.

Abstract: Various approaches for data storage and retrieval for a computer memory include processing a computational workflow having multiple data-processing steps, generating and storing a first hash value associated with a first step of the data-processing steps based on an input to the first step, generating and storing a second hash value associated with a second step of the data-processing steps based on the generated first hash value, and reconstructing a computational state of the workflow based on the second hash value, and thereby avoid re-execution of a portion of the workflow corresponding to the second hash value.

Abstract: Systems and methods for data storage and retrieval for a computer memory include processing a computational workflow having multiple data-processing steps, generating and storing a first hash value associated with a first step of the data-processing steps based on an input to the first step, generating and storing a second hash value associated with a second step of the data-processing steps based on the generated first hash value, and reconstructing a computational state of the workflow based on the second hash value, and thereby avoid re-execution of a portion of the workflow corresponding to the second hash value.

Abstract: Method and apparatus for detecting insufficient homology regions of a reference sequence are described herein. The method can identify an insufficient homology region within a reference sequence with respect to a genomic sample of a subject by determining the extent of abnormality of a particular combination of features exhibited by an aligned sequence read. The method can include obtaining an initial alignment based on a reference sequence and sequence reads derived from a genomic sample of a subject, determining an expected background level of alignment abnormalities in the initial alignment, determining an unexpectedness of observed alignment abnormalities for each sequence read, identifying insufficient homology regions within the reference sequence, and tagging the identified insufficient homology region for a remedial action.

Abstract: A method and corresponding apparatus for identifying tandem repeats in a nucleotide sequence is described. Tandem repeats can be identified by identifying one or more lines present in a self-alignment plot of the nucleotide sequence. The disclosed method includes identifying one or more square-shaped subregions (SSS) representing a tandem repeat and each associated with a plurality of identified candidate alignments by: i) estimating a defining point of an individual square for each of the candidate alignments, each candidate alignment having a start point and an end point, the start point and the end point positioned along adjacent sides of the individual square; ii) selecting one or more seed alignments from the one or more candidate alignments; and iii) associating the one or more candidate alignments with the one or more seed alignments. Based on the associating, a final SSS representing a tandem repeat is determined and its presence is reported.

Abstract: Various approaches for data storage and retrieval for a computer memory include processing a computational workflow having multiple data-processing steps, generating and storing a first hash value associated with a first step of the data-processing steps based on an input to the first step, generating and storing a second hash value associated with a second step of the data-processing steps based on the generated first hash value, and reconstructing a computational state of the workflow based on the second hash value, and thereby avoid re-execution of a portion of the workflow corresponding to the second hash value.

Abstract: A method and corresponding apparatus for identifying tandem repeats in a nucleotide sequence is described. Tandem repeats can be identified by identifying one or more lines present in a self-alignment plot of the nucleotide sequence. The disclosed method includes identifying one or more square-shaped subregions (SSS) representing a tandem repeat and each associated with a plurality of identified candidate alignments by: i) estimating a defining point of an individual square for each of the candidate alignments, each candidate alignment having a start point and an end point, the start point and the end point positioned along adjacent sides of the individual square; ii) selecting one or more seed alignments from the one or more candidate alignments; and iii) associating the one or more candidate alignments with the one or more seed alignments. Based on the associating, a final SSS representing a tandem repeat is determined and its presence is reported.