Abstract: According to implementations of the present disclosure, a solution of table structure recognition is provided. A first set of reference points in the image including the table is determined based on a first feature map. The first feature map is generated from an image, and the first set of reference points are candidate points on the separation lines of a first type of the table. Based on at least a part of the first feature map and features of the first set of reference points, a set of predicted separation lines of the first type of the table can be determined in the image. The structure of the table is determined based at least on the set of predicted separation lines of the first type. In this way, the tables of various structures can be restored from the image.

Abstract: A method for preparing heat-conductive cement slurry for well cementation includes the following steps: S1, uniformly mixing sodium 1-butanesulfonate, sodium dodecyl diphenyl ether disulfonate and polyvinylpyrrolidone to obtain an admixture; S2, dissolving the admixture in deionized water and stirring to obtain a dispersant solution; S3, adding graphite to the dispersant solution and stirring to obtain a graphite dispersion; S4, stirring cement and deionized water in a slurry cup to obtain cement slurry; and S5, mixing and stirring the graphite dispersion and the cement slurry to obtain the heat-conductive cement slurry. The heat-conductive cement slurry can effectively improve the heat conductivity coefficient of set cement, and significantly improve the heat conductivity of the set cement, and has a broad market application prospect.

Abstract: A comprehensive climate adaptability permafrost subgrade hydrothermal regulation system is provided. The system includes a wind-driven forced convection cooling plate, a wind-driven device, a thermal insulation layer and a capillary blocking covering layer, where the wind-driven forced convection cooling plate is laid at a bottom of a subgrade, and a slender channel is arranged in the plate; the wind-driven device is connected with the slender channel in the wind-driven forced convection cooling plate, and a liquid working medium is driven to flow in the slender channel by a pump; the thermal insulation layer is laid on an upper part of the wind-driven forced convection cooling plate; and the capillary blocking covering layer is laid on a slope.

Abstract: The present disclosure discloses an imaging system and a sequencing system. The imaging system comprises a first carrier stage, a lens module arranged on the first carrier stage, and a first support seat, a second splitter module, a focusing lens set and a detector module arranged on a benchtop of the first carrier stage. The optical axis of the lens module is perpendicular to the benchtop. The first support seat is provided with a light source module, a focusing module, and a first splitter module. The light source module is arranged aside from the optical axis of the lens module. The focusing module and the first splitter module are located on the optical axis of the lens module, and the first splitter module is located between the lens module and the focusing module. At least part of the second splitter module is located on the optical axis of the lens module and located between the first splitter module and the lens module.

Abstract: The present disclosure relates to the field of optical device technology, and in particular, to an optomechanical system and a sequencing system. The optomechanical system comprises an illumination device, an imaging device, and a movable platform device. The illumination device is configured for emitting an excitation light to irradiate a sample of interest so as to excite the sample of interest to generate an emission light. The imaging device is configured for acquiring the emission light generated by the sample of interest and forming an image. The movable platform device is configured for driving the sample of interest to translate and/or rotate relative to the imaging device, so as to enable the imaging device to consecutively acquire the emission light generated by the sample of interest.

Abstract: The present application discloses an imaging system, a sequencing system, and an imaging method. The imaging system according to embodiments of the present application comprises an objective lens, an optical correction element, and image sensors. The optical correction element can move into or out of an imaging optical path of the imaging system. When the optical correction element moves into the imaging optical path, the optical correction element is positioned between the objective lens and the image sensors. By correcting the aberration generated when the imaging system images a first surface and a second surface of a sample of interest via the optical correction element, the imaging system according to embodiments of the present application can sharply image the first surface and the second surface of the sample interest, thus improving the sequencing efficiency and the sequencing throughput.

Abstract: A cholinesterase inhibitor polymorph, wherein specifically disclosed are a octahydroaminoacridine succinate polymorph, a corresponding crystal composition and pharmaceutical composition, and applications thereof. The compound octahydroaminoacridine succinate is used for screening and studying polymorphs, and the discovered polymorphs are appraised and evaluated; crystal forms having better physical and chemical properties are determined for subsequent development and study, and crystal forms having good stability and an excellent therapeutic effect are obtained.

Abstract: A preparation method of the microcapsules for low-temperature well cementation to be used to control cement hydration heat includes: (S1) a shell material, and added into deionized water, then the resultant mixture being stirred in a thermostat water bath so as to completely dissolve it into a homogeneous and stable shell material solution; (S2) a core material and an emulsifier being put into a three-necked flask and stirred in a thermostat water bath so as to uniformly emulsify and disperse them, forming a stable oil-in-water core material emulsion, while adjusting the pH value of the emulsion with a pH adjuster; (S3) the three-necked flask containing the core material emulsion being transferred to a water bath, and then the shell material solution being dropwise added into it with stirring, after reacting, a solid-liquid mixture being poured out so as to naturally cool it to room temperature.

Abstract: A preparation method of the microcapsules for low-temperature well cementation to be used to control cement hydration heat includes: (S1) a shell material, and added into deionized water, then the resultant mixture being stirred in a thermostat water bath so as to completely dissolve it into a homogeneous and stable shell material solution; (S2) a core material and an emulsifier being put into a three-necked flask and stirred in a thermostat water bath so as to uniformly emulsify and disperse them, forming a stable oil-in-water core material emulsion, while adjusting the pH value of the emulsion with a pH adjuster; (S3) the three-necked flask containing the core material emulsion being transferred to a water bath, and then the shell material solution being dropwise added into it with stirring, after reacting, a solid-liquid mixture being poured out so as to naturally cool it to room temperature.

Abstract: A cholinesterase inhibitor polymorph, wherein specifically disclosed are a octahydroaminoacridine succinate polymorph, a corresponding crystal composition and pharmaceutical composition, and applications thereof. The compound octahydroaminoacridine succinate is used for screening and studying polymorphs, and the discovered polymorphs are appraised and evaluated; crystal forms having better physical and chemical properties are determined for subsequent development and study, and crystal forms having good stability and an excellent therapeutic effect are obtained.