Abstract: The present disclosure relates to the technical field of landslide hazard model tests, and in particular to a landslide model test method and device for realizing multi-variable synchronous monitoring. In the test device, a soil slope simulation unit is configured to pile up a soil slope and simulate different inclinations of the slope. A rainfall simulation unit is configured to simulate rainfall of different intensities and induce a landslide. A runoff-seepage separation unit is configured to realize separation of runoff from seepage of the slope under the effect of rainfall. A monitoring module is configured to monitor runoff and seepage flow rates of the slope, changes in water content and pore water pressure within the slope, and a morphological change of the slope under the effect of rainfall, to obtain a mechanism of rainfall-induced landslide deformation and damage based on changes in the flow rate.

Abstract: The present disclosure relates to a medical silicon rubber having high mechanical property and a preparation method thereof. The medical silicon rubber comprises the following raw materials in parts by weight: 50˜90 parts of silicon rubber, 10˜50 parts of polyurethane, 10˜50 parts of fillers, 2˜6 parts of hydrogen-containing silicon oil and 2˜5 parts of a vulcanizing agent. The preparation method comprises: evenly mixing a part of fillers with silicon rubber in an internal mixer, and evenly mixing the other part of fillers with polyurethane in the internal mixer; and mixing the mixed polyurethane on an open type rubber refining machine, then successively adding hydrogen-containing silicon oil, the evenly mixed silicon rubber and the vulcanizing agent into the open type rubber refining machine many times by small portions, and finally vulcanizing the mixed rubber on a plate rubber vulcanizing machine for 5˜15 min at 150˜190° C.

Abstract: The present disclosure relates to a multi-factor coupling cooperative early warning method and system for fatigue crack propagation of a steel structure.

Abstract: A projection apparatus includes a light source assembly, a display control circuit, a light valve, a vibrating lens drive assembly, and a vibrating lens. The display control circuit is configured to obtain a plurality of sub-images; in a process of emitting beams of three primary colors by the light source assembly to the light valve sequentially, control, according to primary color parameters of the pixels in each sub-image, the light valve to sequentially reflect beams corresponding to the plurality of sub-images to the vibrating lens; and in a process of projecting each sub-image, transmit a vibrating lens current control signal corresponding to the sub-image to the vibrating lens drive assembly. The vibrating lens drive assembly is configured to provide at least one vibrating lens driving current to the vibrating lens according to the vibrating lens current control signal corresponding to the sub-image.

Abstract: An in-situ stress measurement device for ultra-deep non-vertical drilling adopts a technical route of single channel and bidirectional rolling of in-hole equipment, and its related functions are mainly realized by a bidirectional rolling device and a split-type axial-force-free circuit switching valve. The bidirectional rolling device can drive the in-hole equipment to move freely in a circumferential direction and back and forth, which changes sliding friction between the in-hole equipment and a hole wall into rolling friction during an in-situ stress measurement of non-vertical drilling. The split-type axial-force-free circuit switching valve provides a technical solution for a single-pipe test in the non-vertical drilling.

Abstract: Disclosed are a bus parking allocation method and apparatus considering operational preferences. The method includes: obtaining a bus station dataset, a parking lot dataset, a bus information dataset, and a bus departure/return dataset; obtaining a distance dataset containing distances between bus stations and parking lots; building a parking allocation model considering operational preferences; building an objective function of the parking allocation model, where one group of buses are allocated to one group of parking lots, with each bus being allocated to at most one parking lot, and the number of buses parked in each parking lot is less than or equal to a capacity of the parking lot; building bus preference lists and parking lot preference lists, and calculating the objective function while satisfying the preference lists, to minimize total parking costs of all buses, thereby obtaining parking allocation results considering operational preferences; and designing multiple visualization views for display.

Abstract: Disclosed in the present disclosure is a commutative encryption and watermarking method based on a chaotic system and a zero watermark for vector geospatial data. According to the method, firstly, the vector geospatial data are scrambled and encrypted by using chaotic sequences generated by a composite chaotic system. Then, vector geospatial elements are randomly combined in pairs. A feature matrix is constructed according to the number of vertex coordinates of the vector geospatial elements in combinations, and the parity of the number. Finally, an XOR operation is performed on the feature matrix and the watermark image to construct a zero watermark image, and the zero watermark is constructed through invariant features of the vector geospatial data.

Abstract: An inspection system, including: a carrying device; at least one ray source and a detector assembly. When the at least one ray source is located at one of scanning positions relative to the carrying device, the at least one ray source and the detector assembly are lifted or lowered along the rotation axis relative to the carrying device and the at least one ray source emits X-rays. After the at least one ray source and the detector assembly are lifted or lowered a predetermined distance relative to the carrying device, the at least one ray source rotates around the rotation axis relative to the carrying device to another one of scanning positions. The inspection system further reconstructs a three-dimensional scanning image of the object to be inspected based on detection data of the detector assembly.

Abstract: A marine-derived nanoselenium-producing strain and a method for preparing nanoselenium by using the strain are provided in the present disclosure, belonging to the field of nano biomaterials. According to the present disclosure, a Bacillus strain capable of preparing nanoselenium is screened from sediments taken from the Arctic Ocean, named Bacillus sp. Q72, which has been deposit in the China General Microbiological Culture Collection Center, and the deposit number is CGMCC No.26355. The extracellular fluid of this strain is used to directly reduce high concentrations of sodium selenite to obtain selenium nanoparticles.

Abstract: A differentiated real-time injection-production optimization adjustment method of an intelligent injection-production linkage device belongs to the field of oil reservoir injection-production technologies.

Abstract: An inspection system and method, the inspection system includes: a carrying device, at least one ray source, where each ray source includes a separate housing to define a vacuum space and a plurality of target spots enclosed within the housing; and a detector assembly. The at least one ray source and the detector assembly are lifted or lowered along a central axis of the carrying device relative to the carrying device. When viewed along the central axis, the ray source is translatable between scanning positions relative to the carrying device. When the ray source is at one of the scanning positions, the ray source and the detector assembly are lifted or lowered along the central axis, and the ray source emits X-rays; and when the ray source and the detector assembly are lifted or lowered a predetermined distance, the ray source translates to another one of the scanning positions.

Abstract: Disclosed in the present disclosure is a classification method based on skeleton lines for building shapes. The method includes: (1) expanding a template library of buildings by combining building shape classification in architecture and building shape features in real life on the basis of inheriting advantages of a traditional template matching method; (2) avoiding influence of small depressions and protrusions of the buildings on overall shapes by constructing a least-squares template; (3) extracting the skeleton lines of the buildings and calculating feature vectors of the buildings; and (4) calculating similarity between feature vectors of skeleton lines of the buildings and skeleton lines of templates by using cosine similarity, and selecting the template with the highest similarity as a classification result of the building shapes.

Abstract: The present disclosure relates to multi-layer composite articles including at least two nonwoven web layers. Each or the layers may be a spunbonded web, and each may include biodegradable materials. The multi-layered composites of the present disclosure are particularly well suited for air filtration, as they can combine a high dust holding capacity with sufficient strength, dimensional stability, and a relatively low pressure drop.

Abstract: A polyimide random copolymer has a structure represented by formula (I). A method for preparing the polyimide random copolymer, a membrane made of the polyimide random copolymer, and a method for preparing a polyimide-based hollow fiber membrane are also provided. A system for purifying helium gas and a method for purifying helium gas are related to the membrane made of the polyimide random copolymer.

Abstract: The present application provides a battery cover plate and a battery. The battery cover plate includes a cover plate body, a first seal, a second seal, and a sealing ring. The cover plate body is provided with a liquid injection hole, the first seal is attached to a hole wall of the liquid injection hole and is provided with a threaded hole extending along an axis direction of the liquid injection hole. The second seal includes a head and a connecting part, a diameter of the head is greater than a diameter of the connecting part, a first step surface is defined between the head and the connecting part, the connecting part is provided with an external thread threadedly connected to the threaded hole. The sealing ring is sleeved on the connecting part and located between the first step surface and an upper surface of the cover plate body.

Abstract: A riser tube coating for a cast aluminum alloy includes a coating-riser tube contact layer material and a coating-aluminum liquid contact layer material. The present invention has a coating protection effect to the maximum mainly by designing ratios of ZrO, Al2O3, ZnO, binders and other materials and a coat drying heat treatment process, and finally realizes effects of protecting a riser tube, being free of aluminum sticking and prolonging a service life.

Abstract: Provided is a sofa extension apparatus. The sofa extension apparatus includes a sofa frame, extension brackets, a first linkage rod, a second linkage rod and a linear drive assembly. Each extension bracket includes a sofa fixing member and a leg portion extension assembly, the sofa fixing member is connected to the sofa frame, the leg portion extension assembly is rotatably connected to a front end of the sofa fixing member. Two ends of the first linkage rod are fixedly connected to rear ends of two sofa fixing members respectively. Two ends of the second linkage rod are connected to two leg extension assemblies respectively. The linear drive assembly is configured to drive the first linkage rod and the second linkage rod to move relative to each other, so as to enable the two extension brackets to be extended or retracted.

Abstract: A lid plate and a battery are provided by the present application. The lid plate includes a top lid, a lower plastic and a current collecting disk. The top lid is stacked with the lower plastic. An accommodating space is defined on a side of the lower plastic away from the top lid. Supporting protrusions are provided in the accommodating space. The supporting protrusions are configured to defined a limiting space. The current collecting disk includes the current collecting disk main body and the fuse structure. The fuse structure includes a first part and a second part. The first part is electrically connected to the top lid through the lower plastic, the second part is connected to the current collecting disk main body. The current collecting disk main body is located outside the limiting space and abuts against the supporting protrusions.

Abstract: Systems and methods of large depth-of-field microscopic structured-light 3D imaging include and/or implement capturing a plurality of images of a scene using a plurality of focus settings, each of the plurality of images corresponding to one of the plurality of focus settings, the plurality of images corresponding to a focal stack; processing the plurality of images; merging the plurality of images into an all-in-focus phase map; and reconstructing a 3D shape of the scene based on the all-in-focus phase map.