8results about How to "Poor repeatability" patented technology

The invention discloses a mirror symmetry type digital radiographic inspection tool, which comprises a bottom plate placed on an objective table of digital radiographic inspection equipment; a bearing platform of a workpiece is made of a material with a low ray attenuation coefficient; the multiple workpieces are placed at the two ends of the bottom plate in a mirror symmetry mode; the multiple sets of limiting pieces are installed on the bottom plate, each limiting piece is divided into a left part and a right part, and the limiting pieces of the left part and the right part are distributed in a mirror symmetry mode; each workpiece is correspondingly installed in the corresponding limiting piece. Through the design of the invention, the dependence on the skill of a ray operator can be reduced, the time consumed for placing the workpiece is reduced, and the repeatability and consistency in the ray detection process are ensured. More importantly, by reducing the position change of a five-axis movement system formed by the ray machine, the objective table and the imaging plate in the multi-workpiece detection process, the time required for multi-workpiece ray transillumination is remarkably shortened, and the detection efficiency is improved.

The application discloses a cement aerogel material with micro-expansion and shrinkage inhibition and a preparation method thereof. The cement aerogel material is prepared by mixing, foaming, pore forming and drying of a first component, cement and a second component. The first component comprises a hydrogel polymer, an expansion component, water and a dispersing agent. The second component comprises a foaming agent. The weight ratio of the hydrogel polymer, the expansion component, water and the cement is 0.08-0.3:0.04-0.3:8-15:1. By introducing the expansion component with a proper proportion, the expansion component expands, the intermediate-state skeleton strength is improved, and the shrinkage is resisted. The expansion volume is not less than the shrinkage volume in the drying process, the drying shrinkage is effectively offset, the overall structure integrity is maintained, and finally an additional active reinforcement effect is generated.

This application relates to an intelligent seedling raising device for aquatic plant seed bank germination experiments, belonging to the field of seed cultivation technology. It includes a cultivation box with wheels, internally equipped with multiple layers of clamps, on which culture dishes containing cultivation troughs and germination paper are placed. An intelligent camera is fixed by a mounting bracket and faces the culture dishes to acquire images. A nozzle can move vertically under the action of a drive mechanism and spray water mist onto the culture dishes. A humidity sensor monitors the humidity inside the box. A heating and cleaning mechanism is linked to the nozzle position; when the nozzle is to the side of the camera, it is in a retracted state to ensure lens imaging; when the nozzle moves down below the camera, the mechanism unfolds and forms a shielding space, spraying and heating air onto the lens to remove moisture and impurities, keeping the lens clear. This device, through the coordinated action of multiple mechanisms, balances water supply, environmental control, and image quality to a certain extent, facilitating the stable conduct of aquatic plant seed germination experiments.

The invention discloses a method for preparing a ZnO single crystal nano sheet material. The method comprises the following steps: adding zinc acetate dihydrate and hexamethylenetetramine into deionized water to obtain a mixed solution, then adding the mixed solution into a reactor, performing a hydrothermal reaction at 100-140°C for 12-36 hours, and then performing centrifugal separation, washing, and drying to obtain a white powder; then transferring the white powder into a tube furnace, heating the temperature to 600-1000°C in an Ar atmosphere or a H2 / Ar mixed atmosphere for 1-4 hours to obtain a porous ZnO (002) single crystal nano sheet structure or a non-porous ZnO (101) single crystal nano sheet structure. The ZnO single crystal nano sheet material prepared by the invention has a simple preparation process and good repeatability, and is convenient for large-scale promotion.

This invention provides a method for preparing cubic phase zirconia nanoparticles based on the complexation confinement effect. Step 1 involves weighing ZrOCl2·8H2O, YCl3, and (C6H) 10 O5) n Step 1: Add deionized water to a beaker and stir until completely dissolved to obtain a mixed solution; Step 2: Weigh EDTA-2Na·2H2O into a beaker, add deionized water, and stir until completely dissolved; Step 3: Add the solution obtained in Step 2 to the solution obtained in Step 1, heat and stir in a water bath to obtain a zirconia precursor solution; Step 4: After centrifuging and washing the zirconia precursor solution, dry it in an oven and grind it to obtain zirconia precursor powder; Step 5: Place the zirconia precursor powder in a muffle furnace and calcine it at high temperature in air to obtain cubic phase nano-zirconia powder. This method is simple and easy to implement, and can be easily scaled up for industrial production. The product has high purity and can be used in SOFC and oxygen sensors, etc.

The utility model relates to the technical field of test tubes, and discloses a test tube of a flow cytometer, which comprises a test tube main body, a round hole is arranged at the top of one side of the test tube main body, a diaphragm is fixedly connected inside the round hole, a fixing mechanism is fixedly connected to one side of the round hole, a silicone tube is fixedly connected to one side of the fixing mechanism, and the silicone tube is fixedly connected to the other side of the test tube main body. The bottom of the test tube main body is integrally connected with a limiting shell, and the interior of the limiting shell is fixedly connected with an isolation mechanism. According to the test tube of the flow cytometer, through the arrangement of the diaphragm, the fixing mechanism and the silicone tube, the piercing device is rotated until the piercing device is rotationally fixed in the threaded sleeve, so that the other side of the piercing device can pierce the diaphragm, and then the silicone tube is extruded, so that washing-free hemolysin in the silicone tube can flow into the test tube main body through the fixing mechanism; the preloading of the washing-free hemolysin is facilitated, the manual addition of the washing-free hemolysin is not needed, and the operation complexity and the time cost of the experiment are reduced.

The invention relates to the field of ear image feature extraction, and provides a novel method based on ear image feature extraction and corresponding to a human body constitution. The method aims at evaluating the health state of an individual by analyzing ear image characteristics, and providing personalized health management suggestions according to the health state. According to the method, key features are extracted from the auricle image by using an image processing technology, and are combined with the traditional Chinese medicine constitution theory, so that the human health condition is effectively evaluated. In addition, the invention also discusses the application value of ear image characteristics in traditional Chinese medicine diagnosis, and opens up a new path for the combination of traditional medicine and modern science and technology.

The invention discloses a high-penetrability ray detection material and a preparation method thereof, and belongs to the technical field of preparation of high-penetrability ray detection materials. On the basis of the Ce: YAG transparent scintillation ceramic, Ce < 3 + >, Mn < 2 + >, Cr < 3 + > and Si < 4 + > are co-doped, and all the elements act synergistically to co-improve the optical performance of Ce: YAG; wherein Mn < 2 + > and other components act to cause non-radiative energy transfer of Ce < 3 + >, increase of emission intensity, broadening of an emission peak and gradual movement to infrared light; co-doping of Cr < 3 + > and Ce < 3 + > can improve scintillation performances such as light output and light absorption intensity; si < 4 + > doping can improve the uniformity of the microstructure, improve the optical transparency and achieve the purpose of improving the luminescence property and the detection effect of the transparent scintillation ceramic.