Abstract: A method for 3D surface imaging of an object, comprising generating a sinusoidal pattern from an input beam; projecting the sinusoidal pattern onto the object; acquiring deformed structured images from the object; reconstructing and displaying the surface of the object in real-time. A system comprises an device encoding an input beam with a structured pattern; a filter configured to spatially filter the encoded beam; a projector lens projecting the structured pattern onto the object; a high speed camera acquiring a structured pattern deformed by the 3D surface of the object; a graphic processing unit; and a CoaXPress interface transferring data acquired by the camera to the graphic processing unit; the graphic processing unit reconstructing and displaying the 3D surface of the object in real-time.

Abstract: The present disclosure discloses a medium transmission test device and a method for concrete under a temperature-osmotic pressure-load coupling effect. The device includes a loading device and a water pressurization device; the loading device includes a press, an upper steel plate and a lower steel plate used for clamping a test block, and a fastener that connects the upper and lower steel plates; the upper steel plate includes a first steel plate and a second steel plate; a spring is sleeved on a screw between the first steel plate and the second steel plate; the water pressurization device includes a liquid storage tank, a pressurization pump, a liquid storage pool, a connecting pipe for communicating the pressurization pump to the liquid storage tank, and a connecting pipe for connecting the pressurization pump to the liquid storage pool; the liquid storage tank is provided with an open end; and a tank port of the open end is fixedly connected to a side surface of the test block.

Abstract: The invention discloses a strontium ferrite-based sacrificial mortar and its preparation method, the strontium ferrite-based sacrificial mortar mainly comprises 720-1000 parts of sulphoaluminate cement, 100-300 parts of strontium ferrite, 600-650 parts of quartz sand, 400-450 parts of water and 0.01-35 parts of superplasticizer. The preparation process is simple, and the strontium ferrite-based sacrificial mortar can be prepared by using a conventional forced single horizontal shaft concrete mixer. The obtained mortar has excellent working performance, compressive strength and corrosion resistance. It can be used in the current third and future fourth generation nuclear power plant core catchers, and has obvious engineering application value.

Abstract: The present disclosure discloses a medium transmission test device and a method for concrete under a temperature-osmotic pressure-load coupling effect. The device includes a loading device and a water pressurization device; the loading device includes a press, an upper steel plate and a lower steel plate used for clamping a test block, and a fastener that connects the upper and lower steel plates; the upper steel plate includes a first steel plate and a second steel plate; a spring is sleeved on a screw between the first steel plate and the second steel plate; the water pressurization device includes a liquid storage tank, a pressurization pump, a liquid storage pool, a connecting pipe for communicating the pressurization pump to the liquid storage tank, and a connecting pipe for connecting the pressurization pump to the liquid storage pool; the liquid storage tank is provided with an open end; and a tank port of the open end is fixedly connected to a side surface of the test block.

Abstract: A sacrificial concrete for a core catcher and a preparation method thereof are provided. The sacrificial concrete includes raw materials in parts by weight as follows: cement, 575˜625 parts; a quartz sand, 1200˜1300 parts; a hematite ore, 700˜800 parts; water, 200˜220 parts; a water reducing agent, 7˜10 parts; and strontium oxide, 0˜10 parts. The process of the preparation method is simple, and the sacrificial concrete with excellent performances of fluidity, strength and high-temperature resistance can be prepared by the known mixing technology. The sacrificial concrete can reduce releasing of radioactive substances 89Sr and 90Sr, so as to improve safety of nuclear power plants in case of a severe accident. Moreover, the sacrificial concrete can be used not only in a core catcher of current third generation nuclear power plant, but also in a core catcher of future fourth generation nuclear power plant, and has widespread engineering application value.

Abstract: The invention discloses a method and system for identifying fingerprint. The method comprises: S1: adjusting a camera to focus the camera on a lens; S2: capturing continuously by the camera fingerprint images formed by a finger pressing the lens, and sending the fingerprint images to an image processing module; and S3: processing the fingerprint images by the image processing module so as to acquire fingerprints. In this way, only a common camera is required for acquiring the fingerprint according to the invention, which is easy to operate at a low cost.

Abstract: The invention discloses a method and system for identifying fingerprint. The method comprises: S1: adjusting a camera to focus the camera on a lens; S2: capturing continuously by the camera fingerprint images formed by a finger pressing the lens, and sending the fingerprint images to an image processing module; and S3: processing the fingerprint images by the image processing module so as to acquire fingerprints. In this way, only a common camera is required for acquiring the fingerprint according to the invention, which is easy to operate at a low cost.