31results about How to "Help eliminate" patented technology

The invention provides a low-temperature heat-seal acrylic emulsion and a preparation method of the low-temperature heat-seal acrylic emulsion. The preparation method comprises the steps of adopting seeded emulsion polymerization and adding a defined amount of microcrystalline wax before a vacuum degassing and absorbing after-treatment. The parts of the components by weight are 100 parts, including 25 parts of monomer mixture which comprises 75-90 percent of crylic acid -2- ethyl acid ester, 5-20 percent of acrylonitrile and 5-10 percent of methacrylic acid, an initiating agent which comprises organic peroxides, methanal and sodium hydrogen sulfate, a mixed emulsifying agent which comprises a non-ionic surface active agent and secondary chain alkyl sodium sulfonate, a seeded emulsifying agent which comprises secondary chain alkyl sodium sulfonate and MA-80, an auxiliary agent which comprises ammonium acetate and ferrous chloride, and a potential of hydrogen (PH) conditioning agent. The heat-seal temperature of the low-temperature heat-seal acrylic emulsion is 40-48 DEG C. The low-temperature heat-seal acrylic emulsion is good in stability, good in particle evenness, and good in heat-seal evenness. The preparation method of the low-temperature heat-seal acrylic emulsion is used for high-speed packaging of food such as candies and chocolates with the requirement of low temperature and heat seal.

The invention discloses a lubricant for root canal treatment, which comprises sodium edetate, citric acid, carbamide peroxide, cetyltrimethylammonium bromide, sodium carboxymethylcellulose, glycerin and water. The lubricant of the present invention can soften the root canal wall, reduce preparation resistance, and is especially suitable for the preparation of large-tapered nickel-titanium instruments. By comparing the use of root canal lubricant (experimental group) and no use of root canal lubricant (control group) two groups of experiments Similarly, the results of clinical trials show that the use of root canal lubricants in the root canal preparation process, the detection rate of bacteria in the root canal was significantly lower than that of the group without lubricants, indicating that the use of lubricants in the root canal preparation process helps to eliminate the bacteria in the root canal. Bacteria, creating conditions conducive to the healing of clinical chronic apical periodontitis.

The invention discloses a view screen shadow detection and elimination method based on depth information. The method comprises the following steps: firstly, estimating normal information and point cloud position information of each pixel point by utilizing depth information of an image; comparing the feature similarity between each pixel point and a spatio-temporal local neighborhood pixel point in a video stream of each pixel point to estimate the shadow confidence value of each pixel point, further optimizing the shadow confidence by using a Laplace operator to obtain a final shadow detection result, and finally constructing an illumination recovery optimization equation based on a video stream by using the shadow detection result to obtain a final shadow elimination result. The method has the advantages that the interference of texture information on shadow detection is effectively reduced through texture filtering, the initial shadow confidence coefficient is optimized through a Laplace operator, a more perfect shadow detection result is obtained, shadows are eliminated through chrominance constraints and correlation between a front frame and a rear frame, and chrominance invariance and inter-frame continuity of the result can be effectively guaranteed.

The invention relates to a fertilizer and a preparation method thereof, particularly a fertilizer for preventing and treating clubroot of Chinese cabbage and a preparation method thereof. The invention aims to solve the problem that the Chinese cabbage roots suffer commonly from clubroot in the Chinese cabbage succession cropping region. The fertilizer for preventing and treating clubroot of Chinese cabbage is composed of organic fertilizer dry basis, quicklime and meerschaum. The preparation method comprises the following steps: 1. material weighing; 2. raw material pretreatment; 3. granulation; and 4. drying to obtain the fertilizer for preventing and treating clubroot of Chinese cabbage. The fertilizer can effectively inhibit clubroot of Chinese cabbage in Chinese cabbage succession cropping lots from generation, and is equivalent to anti-cancer drugs which are fed to soil. By using the fertilizer for preventing and treating clubroot of Chinese cabbage, the cure rate of the clubroot of Chinese cabbage in the Chinese cabbage succession cropping region can reach 98% above. The invention can obtain a fertilizer for preventing and treating clubroot of Chinese cabbage.

The invention discloses a machine for curing cold, including a shell, an outlet grid, an inlet grid and a fan. The upper end of the outlet grid is connected with a fan cover; the bottom of the shell is provided with a power supply coupling end. The machine is characterized in that an air channel is arranged in the shell between the outlet grid and the inlet grid; the middle part of the air channelis fixedly provided with a ceramic heating element through a support; the top of the air channel is connected with a hygrosensor; the shell outside the air channel is internally provided with a negative-ion generator; the outlet grid is provided with a negative-ion jet orifice; an insulating layer is arranged between the air channel and a rear shell slab; a circuit wafer which is used for controlling and adjusting time, wind speed and temperature is fixedly arranged between the air channel and a frontal shell slab the middle part of which is embedded with a liquid crystal display. The machineprovided by the invention is reasonable in design, novel in structure, elegant in form, and convenient for carrying and using without any toxic or side effects. Besides, the machine improves the curative effect to cold, particularly suitable for pregnant women, children and the elderly, being novel physiotherapy equipment for curing cold.

The invention discloses a welding waveform control method for gas metal arc welding of a nickel-based alloy. The method comprises the following steps: a basic value stage: setting a basic valve voltage, a basic valve current and a duration t1; an earlier stage of a pulse stage: setting a first voltage, a first current and a duration t2; a later stage of the pulse stage: setting a second voltage, asecond current and a duration t3; finish of the pulse stage: setting a basic value voltage, a basic value current and a duration t4; a short-circuit current inhibiting stage: setting a third voltage,a third current and a duration 5; and an arcing stage: setting an arcing voltage, an arcing current and a duration t6. The method can solve the problem that it is difficult for P-GMAW globular transfer and it is difficult to pave a molten bath and also can overcome the defect that the side wall is not fused and the root is not penetrated incompletely. The method is favorable for all-position welding and is automatically, and is relatively high in deposition efficiency.