328results about How to "Avoid killing" patented technology

An apparatus for deterministically killing one of redundant servers integrated into a network storage appliance chassis along with at least one storage controller is disclosed. Each server can generate a kill signal on a backplane of the chassis to the other server in response to a stopped heartbeat of the other server in order to disable the I / O ports of the other server on a network so the live server can reliably take over the identity of the other server on the network. Unlike conventional kill paths, such as an Ethernet cable connecting the two servers in separate chassis, the present invention does not require the failed server to be operational since the kill path is substantially a direct reset to the I / O ports of the failed server. One server raises a shield before killing the other server to avoid both servers killing each other simultaneously.

An apparatus for deterministically killing one of redundant servers integrated into a network storage appliance chassis along with at least one storage controller is disclosed. Each server can generate a kill signal on a backplane of the chassis to the other server in response to a stopped heartbeat of the other server in order to disable the I / O ports of the other server on a network so the live server can reliably take over the identity of the other server on the network. Unlike conventional kill paths, such as an Ethernet cable connecting the two servers in separate chassis, the present invention does not require the failed server to be operational since the kill path is substantially a direct reset to the I / O ports of the failed server. One server raises a shield before killing the other server to avoid both servers killing each other simultaneously.

The invention relates to a method for preventing disease of konjac, and the method comprises the following five aspects of: konjac seed treatment, soil treatment, sowing pre-treatment, a sowing method and field management. The method disclosed by the invention has the beneficial effects that the konjac seed treatment is carried out, thus diseased konjac seeds can be avoided from being mixed and the konjac seeds can be prevented from being infected with a disease; the soil treatment is carried out, thus harmful bacteria can be avoided from being carried in soil, the harmful bacteria in the soil can be killed, and meanwhile the living environment of the harmful bacteria can be destroyed; the sowing pre-treatment is carried out, thus the diseased konjac seeds can be avoided from being mixed, the disease resistance of the konjac seeds can be enhanced, and sprouting and sowing can be used for reducing the opportunity that the harmful bacteria are immersed into the konjac seeds; interplanting can be used for reducing the survival chance of the harmful bacteria and filtering part of sunlight, and a base fertilizer is applied well, thus top dressing can be reduced, and the influence on a konjac plant can be reduced; the filed management can be used for preventing the harmful bacteria from intruding in the whole journey; and a series of comprehensive methods can be used for preventing the disease of the konjac in every aspect.

Tooth whitening device for whitening teeth using sonochemistry includes a body, and an ultrasonic transducer provided in the body. The ultrasonic transducer is configured for producing ultrasonic waves in the range of 20-100 kHz, and good results have been achieved with ultrasonic waves at a frequency of 40 kHz. There is an ultrasonic horn provided on the body, and the ultrasonic horn is operatively connected with the ultrasonic transducer. A liquid retaining element is provided on the ultrasonic horn, and the liquid retaining element is configured for retaining a liquid tooth whitening composition against a user's teeth. The liquid retaining element may be a sponge or a replaceable pad, such as a foam pad.

The invention discloses horticultural long-acting and slow-release straw nutritional soil as well as a preparation method and a using method of nutritional soil substrate. In percentages by weight, the nutritional soil contains 20 percent of substrate and 80 percent of horticultural soil; the substrate contains 25 percent of perlite, 65 percent of rice straws or wheat straws, 2.0 percent of slow-release agent, 0.75 percent of calcined lime, 0.75 percent of straw well-rotten fungicide, 3.0 percent of nitrogenous fertilizer, 1.0 percent of pure phosphatic fertilizer, 1.75 percent of potassic fertilizer and 0.75 percent of microelement fertilizer; the preparation method of the substrate comprises the following steps: unbaling rice straws or wheat straws, putting under blazing sun for 3-4 daysfor sterilizing; crashing rice straws or wheat straws by a crasher into straw sections with the length of 0.8-1.2cm; and evenly mixing 25 percent of perlite, 65 percent of rice straws or wheat straws, 2.0 percent of slow-release agent, 0.75 percent of calcined lime, 0.75 percent of straw well-rotten fungicide, 3.0 percent of nitrogenous fertilizer, 1.0 percent of pure phosphatic fertilizer, 1.75percent of potassic fertilizer and 0.75 percent of microelement fertilizer to prepare the substrate, and packaging the substrate; and the using method of the nutritional soil comprises the following step: fetching 80 percent of horticultural soil and 20 percent of substrate in percentages by weight. The nutritional soil has no putrefactive odor and musty taste, synchronous straw fermentation rot and flower and plant growth as well as slowly-released nutritional ingredients, and keeps the activity and the self nutrient circulation for a long time.

The invention relates to a clamp head, which comprises a clamp head body, wherein the clamp head body is provided with an inner hole in the axial direction. The clamp head is characterized in that the part of the inner hole positioned at the front end of the clamp head body is also fixed and embedded with a hard alloy sleeve pipe, and the hard alloy sleeve pipe is provided with a pipe hole for a workpiece to penetrate in a rotating way. The clamp head has the advantages that the hard alloy sleeve pipe is fixedly arranged in the inner hole of the clamp head, the abrasion of the inner hole of the clamp head in the processing process is reduced, and the abrasion performance of the clamp head is improved; the head part of the clamp head adopts the uniform equant structure, so the head part of the clamp head has a certain elasticity, and tight locking caused by tight workpiece clamping is prevented; and the clamp head adopts the novel processing process, the uniformity of the clamp head material can be ensured, the deformation of the clamp head is reduced, the concentricity and the roughness of the clamp head are improved, in addition, the cost of the whole process flow is low, the realization is easy, and the quality of the clamp head obtained through processing is good, so the workpiece processed through the fixation of the clamp head is enabled to have higher precision and better quality.

A microorganism for the biological inactivation or detoxification of mycotoxins, in particular ochratoxins, which is selected from bacteria and / or yeasts, which cleaves the phenylalanine group of the mycotoxins, in particular ochratoxins, as well as a method for biologically inactivating or detoxifying mycotoxins, in particular ochratoxins, in food products and animal feeds by the aid of a microorganism, and the use of the microorganism(s).

The invention belongs to the technical field of biological foods and discloses a formula of a composite ferment for being fermented in a human body and a preparation method of the formula. The ferment comprises the following raw materials in parts by weight: 50-70 parts of inulin, 3-10 parts of functional oligosaccharide, 3-10 parts of dietary fibers, 0.1-0.5 part of probiotics, 3-10 parts of fruit and vegetable integrated powder, 0.1-0.5 part of a yeast extract, 0.1-0.5 part of plant protease and 0.1-0.5 part of a sweetening agent. The composite ferment provided by the invention contains active probiotics and enzymes, can be fermented in the human body to metabolize a great amount of poisonous wastes which are taken into the human body through dietary and can be used for helping to regulate the balance of human intestinal flora, improving the gastrointestinal function, reducing potential hazards brought by abuse of antibiotics or hormones and enhancing immune function.

The invention belongs to an extrusion type servo system and in particular relates to a novel high-pressure air charging nozzle. The invention provides a novel high-pressure air charging nozzle which is specially designed for an extrusion type servo system and has good sealing performance at the reverse blocked state and can ensure that no air leaks at the nozzle after air is charged. The invention adopts the technical scheme that the novel high-pressure air charging nozzle comprises a one-way valve, a spring, a one-way valve core, a shell, a plugging cap, a protective retainer ring, an O-shaped seal ring and a circlip for a hole, wherein the shell is a hollow tubular body; the plugging cap is arranged at the right end of the shell; a one-way valve support, the spring and the one-way valve core are disposed inside the shell; and the one-way valve support is connected with the one-way valve core through the spring.

The invention discloses a negative oxygen ion dry powder paint, belonging to the technical field of paints. The paint comprises the following components in percentage by mass: 25-35% of ash calcium powder, 6.2-8.0% of diatomite, 4.5-6.5% of negative ion additive, 1.5-5.0% of antimicrobial agent, 0.15-0.80% of talcum powder, 0.15-0.80% of kaolin, 0.15-0.50% of wollastonite, 0.05-0.15% of surfactant, 0.55-1.5% of redispersible latex powder, 1.2-1.8% of light calcium carbonate powder, 0.15-0.50% of lithopone and the balance of heavy calcium carbonate powder. The paint is capable of efficiently absorbing formaldehyde and other harmful gases and naturally and enduringly releasing negative ions, has the characteristics of high mildew resistance, high bactericidal capacity and favorable air permeability, and can adjust the humidity of indoor air. The coating has the characteristics of favorable strength, favorable toughness, favorable scrubbing resistance and the like.

The invention relates to the technical field of medical high polymer materials and discloses a medical polycaprolactone membrane as well as a preparation method and an application of the medical polycaprolactone membrane. The constituents of the membrane include polycaprolactone; the membrane is 0.5-2mm thick; and the membrane is of a planar mesh structure and the mesh aperture of the planar mesh structure is 100-300 microns. Besides, composite additive materials, such as BETA-tricalcium phosphate, hydroxylapatite and coral, also can be added to the membrane. The invention also provides a method for preparing the medical polycaprolactone membrane by use of the 3D printing technology; the membrane is applicable to the field of bone tissue engineering; and the medical polycaprolactone membrane is used for covering a bone defect part and then repairing the bone defect, and therefore, the effects of surrounding and protecting the bone defect part, reducing stem cell loss, preventing surrounding fiber tissue ingrowth and guiding bone regeneration can be achieved.

The invention discloses a test method and a detection device to detect the pressure received by the gudgeon journals on both ends of a sink roll, which detects the pressure received by the gudgeon journals on both ends of the sink roll through detection of the vibration signals on the left and right edge parts of a band steel. The steps to detect the pressure is to apply tensile force on the band steel to keep the band steel tensioned; to apply external force on the band steel to excite vibration of the band steel; to measure the vibration signal of the band steel with the device; lowpass filtration of the vibration signal in the step C and to analyze the frequency spectrum of the vibration signal in the step C to get the vibration frequency; to calculate the difference of the tension on both sides of the band steel according to the functional relationship of the tension of the band steel and the vibration frequency; to calculate the difference of the pressure received by the gudgeon journals on both ends of the sink roll according to the functional relationship of the pressure received by the gudgeon journals on both ends and the difference of the tension on both sides of the band steel. By adopting the method and the device, the pressure can be detected simply, conveniently and accurately; the pressure received by gudgeon journals on both ends of the sink roll can be detected quickly; the sink roll is ensured to be parallel with a top roller by adjusting the parallelism of the sink roll and the top roller according to the detection result so as to prevent the gudgeon journals of the sink roll from being abraded and seized, and even the shaft from being broken.

The invention synthesizes a type of liver targeted, biodegradable high molecular MRI contrast medium with alpha,beta- poly [(2-aminoethyl) - L-asparagine] as fundamental chain, galactose as target gene, diethylenetriamine pentaacetic acid or L-tyrosine methyl ester derivatives as Gd3+ ligand. The contrast agent is less toxic, biocompatible, and has good relaxation rate than low molecular business contrast medium. Animal experiments showed that in liver organizations its enhancing effect is three times better than commercial and low molecular contrast medium (gadolinium sprayed acid cyelophosphate); the residence time in liver is more than 24 hours, which is 18 hours longer than low molecular business contrast medium. The feature is that Zeta potential for the contrast medium is negative and less than -10mV. We can achieve the MRI visible, the liver targeted, core-shell nanogene vector system with it as a gene vector system shell structure.

The invention belongs to the field of crop fertilizers, and specifically relates to a special liquid medicine fertilizer for increasing production, killing pests and reducing residues of rice and a preparation method thereof. The medicine fertilizer comprises the following raw materials: microbial flora, humic acid, a nitrogenous fertilizer, a phosphatic fertilizer, a potash fertilizer, borax, an insecticide, a water soluble separant, a plant growth regulator, water and the like. The liquid medicine fertilizer directly sprayed to the leaf surfaces of cotton plants is uniform in distribution of nutrient substances, high in utilization ratio, easy to be absorbed by the leaf surfaces of the plants and simple and feasible to prepare and apply, and can further degrade pesticide residues and truly prevent and treat plant diseases and insect pests, thereby increasing the output of rice.

The invention relates to vegetable straw microbial organic fertilizer. The vegetable straw microbial organic fertilizer comprises the following components in parts by weight: 60 to 90 parts of vegetable straw, 0.1 to 0.2 part of urea, 10 to 20 parts of inoculums, 20 to 30 parts of turfy soil, and 0.5 to 1.0 part of a microbial agent. The vegetable straw is crushed and is then mixed with the urea and inoculums according to certain ratio, and short time high-temperature anaerobic biogas fermentation is performed. The mixture is mixed with the turfy soil after fermentation, and aerobic compostingis performed. The microbial agent is added at the later stage of composting, and composting is performed continuously for a certain time, so that the vegetable straw microbial organic fertilizer is obtained. The vegetable straw microbial organic fertilizer contains various microorganisms helpful for promoting the growth of plants, improving soil, eliminating peculiar smell and restraining harmfulbacteria, and can greatly improves the added value of products. The vegetable straw microbial organic fertilizer takes vegetable straw which is rich in resources in vegetable industry concentration areas and huge in storage as the main material, is clear and intelligible in technical process, does not pollute the environment, is good in product fertilizer efficiency and high in additional value,and can effectively solve the problems of harmless treatment and resource utilization of vegetable straw. The vegetable straw microbial organic fertilizer has a wide popularization prospect in vegetable industry concentration areas, and has good ecological and economic value.

The invention discloses a diatom mud negative ion dry powder coating material, and belongs to the technical field of coating materials. The diatom mud negative ion dry powder coating material comprises the following components by mass: 22.8-28.9% of ash-calcium powder, 12.2-14.2% of diatom mud, 5.5-7.2% of a negative ion additive, 3.1-4.8% of an antibacterial agent, 0.8-1.5% of anatase type titanium dioxide, 0.76-0.92% of talc powder, 0.76-0.92% of aluminum silicate, 0.37-0.52% of kaolin, 0.37-0.52% of wollastonite, 0.18-0.32% of a surfactant, 0.76-0.92% of redispersible latex powder, 0.0030-0.0055% of modified seaweed glue powder, and the balance of heavy calcium powder. The diatom mud negative ion dry powder coating material of the present invention has characteristics of efficient absorption of formaldehyde and other harmful gases, natural and long-lasting release of negative ions, strong anti-mildew and bactericidal ability, good gas permeation, indoor air humidity adjusting, good coating strength, good coating toughness, good washing resistance, and the like.

The invention provides a garbage disposal system capable of reducing the load on a public sewage treatment plant by accurately treating water content separated from garbage through a solid-liquid separator. This garbage disposal system 1 comprises a disposer 42 for crushing the garbage, a pump 41 for conveying the crushed garbage with conveying water, the solid-liquid separator 10 for separating the water content from the garbage conveyed by the pump 41, and a garbage treatment unit 46 for treating the solid content separated through the solid-liquid separator 10. The garbage disposal system 1 further comprises a membrane separation activated sludge unit 48 for reducing an organic substance in the water separated from the garbage through the solid-liquid separator 10 and subsequently separating sludge from the water.

The invention belongs to the field of fertilizer for trees and particularly relates to a special liquid pesticide fertilizer for insect prevention of garden trees, and a preparation method thereof. The pesticide fertilizer comprises the following active ingredients: microbial flora, humic acid, nitrogen fertilizer, phosphatic fertilizer, potassic fertilizer, boric acid, insecticide, water-soluble isolating agent, plant growth regulator, water and the like. The liquid pesticide fertilizer is directly sprayed on leave surfaces of the trees, nutrient substances are evenly distributed, high in utilization rate, and easily absorbed by the leaf surfaces of the plants, the preparation and applications are simple and easy, and the special liquid pesticide fertilizer can degrade pesticide residue, and truly prevent insect disease and promote the growth of the trees.

The invention discloses a culture method of microalgae. The method comprises the following steps: (1) conducting domestication and culture on an original seed liquid of microalgae in autotrophic growth conditions by using a mode of increasing the pH value step by step, wherein the initial pH value is 8.0-9.0, which is increased by 2-8 times with pH increasing by 0.5-2 every time; and culturing the microalgae under the same conditions for 24-96 h after each time of pH value increasing, and domesticating and culturing to reach a pH value of 11.0-12.0, so as to obtain a microalgae liquid with high pH tolerance; (2) inoculating the domesticated microalgae liquid to a heterotrophic medium with pH value of 11.0-12.0 and cultivating for 10-24 h, then adjusting the pH vale of the culture medium to 7.0-8.0 and carrying out further culture; and (3) when the microalgae growth achieves a stable period, stopping the cultivation and harvesting microalgae cells. The method can effectively inhibit the growth of infectious microbes in microalgae culture, does not require addition of antibiotics, does not have adverse influences on the quality of microalgae, and is safe, reliable and low in price.

The invention discloses a method for promoting orchid to grow and preventing diseases, and relates to a method for preventing the diseases and promoting orchid branches to grow and prolonging a flowering phase. The method disclosed by the invention comprises the following steps of uniformly mixing a solid state culture and a culture medium into a basin according to the mass ratio of 1 to 50 in orchid plant transplantation, wherein the solid state culture has the spore concentration s 1*10<7>-1*10<8> spore / g and prepared from Trichoderma harzianum T216, and planting an orchid plant, wherein the solid state culture can induce the resistance of the orchid plant to the fungoid diseases such as southern blight, rhizoctonia solani and anthracnose and bacterial soft rot caused by Erwinia carotovara during orchid growth, the plant morbidity is reduced, the disease index is reduced, the orchid is promoted to grow in advance, and the number of blades of the orchid are increased. In addition, the method disclosed by the invention has the advantages that a liquid state culture of the Trichoderma harzianum T216 is regulated into 1*10<5>-1*10<7> spore / mL when the orchid peeps a bud, and the spray treatment is carried out on the orchid plant, so that the branch number of the orchid is increased, and the flowering phase of the orchid is prolonged.

The invention belongs to the field of crop fertilizers, and particularly relates to a special liquid medicinal fertilizer for increasing yield of tobacco leaves, preventing insects and degrading pesticide residue and a preparation method thereof. The fertilizer comprises following raw materials: microbial community, humic acid, nitrogen fertilizer, phosphate fertilizer, potassic fertilizer, calcium fertilizer, boric acid, insecticide, water soluble separant, plant growth regulator and the like. The liquid medicinal fertilizer is directly sprayed onto surface of the tobacco leaf, so that the nutrient substances are uniformly distributed, are highly used, and can be easily absorbed by the surface of the tobacco leaf; the liquid medicinal fertilizer is simple and easy to prepare and apply, also can degrade pesticide residue, really prevents inset diseases and improves the yield of tobacco leaves.

A bolt, wherein a small diameter guide (116) is formed at the terminal tip part of a shaft part (15) and threads (31) oppositely threaded to threads (30) formed in a fixed diameter part (115) are formed in the guide part. When the bolt (1) is inserted into a nut (100) in a tilted state and the threads (31) are engaged with the female screw part (105) of the nut (100), an effect to raise the bolt (1) occurs in the nut and, therefore, unless the bolt is positioned in a correct tightening attitude, it cannot be threaded into the nut (10). Accordingly, the bolt (1) can be securely prevented from being caught or seized into the nut (100). When the threads (31) are formed in an oppositely threaded double threaded screw, the effect can be further increased.

The invention discloses a fluorescence staining reagent for marking leucorrhoea and cervical exfoliated cell pathogenic bacteria. The reagent comprises reagent liquid A and reagent liquid B, wherein the liquid A comprises water, salt, binding protein, specific antibody, fluorescent whitening agent, dissolution promoter, wetting agent and background counterstain, the liquid B comprises water and fluorescein. The fluorescence staining reagent for marking leucorrhoea and cervical exfoliated cell pathogenic bacteria has the advantages that the operation is simple, the staining can be completed just by two operation processes; the staining time is short, observation can be conducted within one minute; compared with a traditional microscopy method, the sensibility and the positive rate are higher; compared with a dry chemical ferment method, the result is more visual and accurate, and the situation of mixed type infection can be better solved, the clinical application is more convenient andquicker, and the diagnostic efficiency of vaginitis and cervicitis is greatly improved.

The invention belongs to the field of a crop fertilizer, and particularly relates to a special liquid fertilizer for increasing yield of strawberry, killing insects and degrading pesticide residues and a preparation method thereof. The fertilizer comprises microbial flora, a humic acid, a nitrogen fertilizer, a phosphatic fertilizer, a potash fertilizer, a boric acid, an insecticide, a water-soluble parting agent and the like. The fertilizer also can provide crop nutrients when killing diseases and pests, and is fast in foliar absorption by foliar absorption of the crop, and less in nutrient possibility, the photosynthesis of the crop also can be increased by the microbial flora, absorption and utilization of the nutrients are facilitated, the crop yield is improved, and the pesticide residues and the like are degraded.

The invention discloses an apis cerana queen breeding method and belongs to bee queen breeding methods. By means of the apis cerana queen breeding method, a bred queen can be large in size, strong, meek in temperament and high in egg production capacity. Bowl-shaped queen cells made of bee wax are fixed to a honeycomb frame, and a queen breeding frame is obtained; the queen breeding frame is put in a queen breeding apis cerana swarm, and worker bees are made to clean the queen cells; the inner walls of the queen cells are brushed with fresh bee milk, eggs of other apis cerana swarms are implanted into the queen cells, and the queen breeding frame is coated with apis mellifera honey in a dipping mode and then put back to the queen breeding apis cerana swarm; the queen breeding frame is taken out and put into an apis mellifera swarm for nursing for 12 hours, then the queen breeding frame is taken out and put back to the queen breeding apis cerana swarm again for breeding for 5-7 days, and a mature queen embryo is obtained; a virgin queen can be hatched on the 9th or 10th day. The queen bred through the method is large in size, strong, high in disease resistance and high in egg production capacity, the bee swarm is meek in temperament, and the bee robbing or honey stealing phenomenon can be avoided even bee swarms are away by 10 cm, and the apis cerana queen breeding method is used for breeding apis cerana.

The invention relates to a method for manufacturing a fabric with antibacterial and electromagnetic shielding functions. The method is characterized by comprising steps of (1), respectively sealing two ends of each hollow fiber in containers which are not communicated with each other, placing one end of each hollow fiber in AgNO<3> solution, placing the other end of each hollow fiber in the corresponding empty container, filling compressed air into the container with the AgNO<3> solution, vacuumizing the empty container with the other ends of the hollow fibers, adding ammonium hydroxide solution and acetaldehyde into the container with the AgNO<3> solution, placing the hollow fibers in water bath to heat the hollow fibers and generating silver particles on the inner walls of the hollow fibers to obtain hollow silver-plated fibers; (2), weaving the hollow silver-plated fibers and common fibers to obtain a fabric; (3), preparing quaternary ammonium salt solution with the mass percentage concentration of 10-20%, soaking the fabric obtained in the step (2) into the quaternary ammonium salt solution and then drying the soaked fabric at the temperature of 60-80 DEG C for 20-40 minutes. The method has the advantage that the fabric has conductive, antistatic and electromagnetic radiation protection functions.

The invention discloses a probiotic hollow microcapsule of Lactobacillus reuteri. The hollow microcapsule, per microcapsule, contains the following components: 1000ml of seed extractive solution of Lactobacillus reuteri, 5-20g of starch, 5-20g of carboxymethyl cellulose, 2-5g of sodium cellulose sulfate and 5-20g of calcium chloride. The invention also discloses a preparation method of the probiotic hollow microcapsule of Lactobacillus reuteri. The invention can prolong the survival time of probiotics at room temperaurre and protect probiotics from being killed by gastric acid after oral intake to allow probiotics to enter the intestinal tract, thereby realizing target delivery and local action of probiotics.

The invention belongs to the technical field of organic fertilizers, and particularly relates to organic fertilizer for tobacco and a preparation method thereof. The organic fertilizer for the tobacco is prepared from an oil cake and a fermentation base which are mixed evenly according to the weight ratio of between 1 and 0.0004 to 0.0006 and are fermented; compositions of the fermentation base are beneficial microbial inoculum and effective vectors of high, medium and low temperature aerobic fermentation, and the number of live bacteria is between 4 and 20 hundred millions / g. The preparation method comprises the following steps: the oil cake is crushed to a fineness of between 1 and 3 mm, CaCO3 is added to adjust the pH value to be between 6 and 7, the fermentation base which accounts for 0.0004 and 0.0006 of the weight of the oil cake and water which accounts for 0.4 to 0.6 of the weight of the oil cake are added to stir evenly, and the organic fertilizer can be obtained through the drying after the fermentation. The organic fertilizer can kill harmful bacteria, parasitic ova and weed seeds, a tobacco plant has robust growth and well-developed leaves after the application, the proportion of first-class tobacco and orange tobacco is greatly improved, tobacco leaves after the roasting have bright and glossy color and luster, and chemical compositions of crude tobacco are harmonious.

The invention relates to a novel chimeric antigen receptor targeting an NK activated receptor. The chimeric antigen receptor can treat malignant tumors caused by NK cytopathy and can also prevent NK cells in a patient from killing introduced therapeutic CAR cells under the background of universal CAR cells. The invention also relates to an engineered immune cell expressing the novel chimeric antigen receptor, a composition containing the engineered immune cell and application of the engineered immune cell in treatment of diseases.