41results about How to "Strong compression resistance" patented technology

The invention discloses a stress absorption band and a construction method thereof. The stress absorption band (3) is arranged at the joint part of a new road (2) and an old road (1), namely from the top surface of a roadbed to the underside of a newly paved oil surface, the stress absorption band (3) is arranged into an inverse trapezoid or an inverse triangular groove, and the groove is filled with asphalt macadam or modified asphalt macadam. The invention also discloses the construction method for the stress absorption band. The stress absorption band (3) is arranged at the joint part of the new road and the old road, can absorb and reduce stress, and prevent road surface diseases caused by the stress at the joint part of the new road and the old road.

The invention provides a polyvinyl alcohol composite foam material and a preparation method thereof, and relates to the technical field of nano materials. The polyvinyl alcohol composite foam material is composed of polyvinyl alcohol and nanofiber. The preparation method of the polyvinyl alcohol composite material comprises the following steps of: adding nanofiber suspension liquid in polyvinyl alcohol liquor, evaporating a solvent under a stirring state, freezing and forming, and freezing and drying to obtain the polyvinyl alcohol composite foam material. The polyvinyl alcohol composite foam material disclosed by the invention is added with nanofiber, so that water resistance of the foam material is strengthened, and therefore, dimension stability of foams is improved; on the other hand, compression strength resistance and modulus of the foam are increased. The preparation method disclosed by the invention is carried out in a water-phase solvent without adding organic substances, and a freeze-drying method is adopted, so that process is green and pollution-free; and moreover, nanofiber in the materials is renewable resources such as cellulose, chitin, chitosan, and the like; and the composite foam is green and degradable environment-friendly material.

The invention discloses magnetic polystyrene foam. Foam serves as a load matrix, the surface of the foam is loaded with a polystyrene slice layer and Fe3O4 nano-particles covered with hollow oleic acid, interconnected high-hydrophobic materials of a three-dimensional network structure are provided, and the loaded polystyrene slice layer and the loaded super-paramagnetic Fe3O4 nano-particles covered with the hollow oleic acid serve as adsorption and magnetic recovery carriers. The Fe3O4 nano-particles covered with the hollow oleic acid are ultrasonically dispersed in an ethanol solution, the foam is immersed in a uniformly-mixed solution of the Fe3O4 particles covered with the hollow oleic acid to be ultrasonically dispersed, magnetic foam is obtained, the magnetic foam is added and dissolved in a sodium dodecyl benzene sulfonate solution to be ultrasonically homogenized, styrene and divinylbenzene are added under the N2 atmosphere, a polymerization reaction is conducted under the effect of an initiator, namely, 2,2'-azobisisobutyronitrile, and finally the magnetic polystyrene foam is obtained. The cyclic utilization rate of the magnetic polystyrene foam is high, the heat stability of an oil absorption material is enhanced, and the application range of the material is widened.

The invention relates to an anionic surfactant for a micro-foam drilling fluid and a preparation method thereof. The anionic surfactant is obtained by mixing a long-chain vinyl monomer A, a carboxyl-containing monomer B and a sulfo-group-containing monomer C according to the mass ratio of 10:1-10:1-10, adding a relative-molecular-mass adjusting agent and performing free radical polymerization. The average relative molecular mass of the anionic surfactant is 1000-10000. The preparation method is simple and practicable, the obtained surfactant is good in foaming performance and high in foam stability, is capable of guaranteeing that the micro-foam drilling fluid has relatively low circulation density at a well-bottom high pressure, and is beneficial for reducing downhole complications.

The invention relates to a cationic surfactant for a micro-foam drilling fluid and a preparation method thereof. The cationic surfactant is obtained by a vinyl cationic monomer A and a vinyl amide compound B according to the mass ratio of 10:1-10, adding a relative-molecular-mass adjusting agent and performing free radical polymerization. The average relative molecular mass of the cationic surfactant is 1000-4000. The preparation method is simple and practicable, the obtained surfactant is good in foaming performance and high in foam stability when being applied to the micro-foam drilling fluid, is capable of guaranteeing that the micro-foam drilling fluid has relatively low circulation density at a well-bottom high pressure, and is beneficial for reducing downhole complications.

The invention discloses a deep dewatering method for sludge. Persulfate, soluble bivalent iron salt and biomass are successively added to the sludge, and a mud cake is obtained by pressure filtrationafter full reaction. The sludge is compounded and conditioned by activated persulfate oxidation and the biomass as a skeleton structure to enhance the strength of sludge flocs, improve the compressibility of the sludge, significantly improve the dewatering performance of the sludge and simultaneously stabilize and deactivate heavy metals in the sludge.

The invention provides a micro-foam drilling fluid which comprises a base fluid and a treatment agent; the treating agent comprises a foam reinforcing agent and a wall protecting agent. The key components of the micro-foam drilling fluid provided by the invention are the foam reinforcing agent and the wall protecting agent, and the foam reinforcing agent and a foaming agent can generate a synergistic effect, so that the wall thickness of micro-bubbles is increased, the air core sealing property in the micro-bubbles is improved, and the stability and compression resistance of the micro-bubblesunder high-temperature and high-pressure conditions are enhanced; the wall protecting agent can be adhered to the surface of a well wall to form a film and seal micro-cracks of the well wall, so thatthe wall protecting agent and micro-bubbles generate a synergistic effect, the pressure-bearing plugging performance of the micro-foam drilling fluid is remarkably improved, and the drilling fluid leakage probability of the micro-foam drilling fluid in the drilling process of a low-pressure leaky stratum is reduced. The micro-foam drilling fluid d provided by the invention has the outstanding advantage of good leakage-proof property, and is especially suitable for low-pressure leaky stratums.

The invention provides a noise camouflaged image information hidden transmission method. Confidential information is camouflaged into noise to be added in a carrier image to realize camouflage and hiding, and a legal receiver can correctly extract the confidential information and recover the carrier image in a high-quality way through four times of standard compression in transmission; and an illegal receiver cannot obtain the high-quality image after receiving the image including the confidential information and cannot correctly extract the confidential information even the illegal receiver knows that the confidential information is included in the noise. Compared with other similar methods, the information hiding security and robustness can be enhanced, and the method still has the high times of compression (4-8 times of JPEG2000 compression) resistance capacity and the high-quality carrier recovery capacity under the appropriate hiding capacity.

The invention relates to a novel hydrogel tissue filling agent for ophthalmology and a preparation method thereof. The hydrogel tissue filling agent for ophthalmology uses monomer vinyl pyrrolidone and methyl methacrylate as raw materials and is prepared by copolymerization according to the mass ratio of vinyl pyrrolidone: methyl methacrylate being equal to 50 to 95%: 5 to 50%. Under an airtight condition, initiator is dissolved in the monomer vinyl pyrrolidone, monomer methyl methacrylate and crosslinking agent are added successively to fully mix the system by stirring, the system is filtered, the filter liquor is poured into a module to be heated to carry out reaction, then dry copolymer gel is obtained; the copolymer gel is hydrolyzed; and repeated washing and swelling, gradient sodium chloride solution dehydration, high temperature sterilization and drying are carried out on the gel after hydrolyzation. The novel hydrogel tissue filling agent for ophthalmology in the invention has higher degree of volume swelling and good compression resistance and good tolerability and biocompatibility in eyes, and can be self-expanding, thereby being expected to have good cosmetic results and fewer complications.

The invention provides an image resampling operation interpolation type identification method. The method comprises the following steps: establishing an image resampling operation expression model; performing an initial blind deconvolution operation on an image subjected to resampling to obtain an initial kernel; figuring out initial kernels with different sizes to obtain a group of convolution kernel set with multiple scales and different sizes; performing convolution on a convolution kernel in the convolution kernel set and an original image corresponding to the convolution kernel, and comparing the original image with the image subjected to resampling, wherein an optimal kernel with the minimum quality difference is the system output; displaying the optimal kernel H* as a column vector; putting the column vector in a classifier to train a model to obtain a classification model; and repeating the processes of step 1 to step 5 on a to-be-measured image, and testing the obtained column vector in the classification model obtained in step 6 to obtain a final detection result. The image resampling operation interpolation type identification method provided by the invention has the advantages of low detection feature dimension, capability of effectively shorten the training time of a classifier of a support vector machine (SVM), high compression resistance and excellent detection accuracy.

The invention discloses a novel bar code screenshot steganography traceability combination algorithm, and belongs to the technical field of information identification. The method comprises the following specific steps: (1) performing starting; (2) analyzing image compatibility; (3) generating fingerprints; (4) performing image segmentation and steganography; (5) performing merging and adjusting; (6) performing ending. According to the invention, through Fourier steganography, LSB steganography and color overlay steganography technologies, on the premise that the bar code is not modified and image changes which can be distinguished by human eyes are not generated, specified character information is written into the picture containing the bar code, and corresponding information can be traced back according to the screenshot after the screenshot is carried out; the method has the effects of high robustness and high compression resistance, and is favorably applied to a platform with a confidentiality requirement, so that information leakage is effectively prevented and blocked.

The invention provides a steam injection method for a heavy oil thermal recovery well. The thermal recovery well comprises a vertical well section and a horizontal well section connected with the vertical well section. The steam injection method comprises the steps that S10, the producing degree of each part of the horizontal well section is judged; S20, steam is injected into the horizontal wellsection; and S30, steam continues being injected into the part, with the low producing degree, of the horizontal well section, and inert gas is injected into the part, with the high producing degree,of the horizontal well section. By applying the technical scheme, the problem that the recovery effect is poor due to the unbalanced producing degree of a heavy oil thermal recovery horizontal well inthe prior art can be solved.

The invention belongs to the field of construction of floors of outdoor sports places, and particularly relates to a polyurethane compression-tolerant floor structure and a construction method thereof. The polyurethane compression-tolerant floor structure is provided with a layer of aluminum plastic plate around track and field equipment, a rigid base layer and a gypsum-based leveling layer are paved at the periphery of the aluminum plastic plate from bottom to top, and a polyurethane elastic material intermediate coating and a water borne polyurethane top coating are arranged above the aluminum plastic plate and the gypsum-based leveling layer. The structure disclosed by the invention can effectively relieve the heavy pressure of track and field equipment to the floor during use, and the hollowing and cracking of the floor around the track and field equipment is avoided.

The invention discloses a high-resilience abrasion-resistant cable material which comprises the following raw materials in parts by weight: 2-3 parts of triterpenoid saponin, 6-10 parts of vinyl carboxylic ester, 370-400 parts of silicon rubber, 50-60 parts of carbon nanotubes, 86-90 parts of acrylic acid, 80-100 parts of N,N'-dicyclohexylcarbodiimide, 7-10 parts of 4-dimethylaminopyridine, 300-460 parts of tetrahydrofuran, 1.7-2 parts of a silane coupling agent KH550, 120-150 parts of 65-68wt% sulfuric acid, 100-130 parts of 95-98wt% nitric acid, 30-40 parts of tetraethyl orthosilicate, 2-3 parts of ammonia water, 4-5 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, 3-5 parts of polyimide, 1-2 parts of diacetone alcohol, 4-6 parts of propylene glycol alginate, 1-2 parts of calcium alginate, 10-13 parts of chlorinated PVC resin, 3-4 parts of barium petroleum sulfonate and 4-6 parts of an antioxidant DFC-34. The cable material is very high in resilience, strong in anti-compression capability, and high in abrasion resistance.

The invention provides a surfactant for drilling fluid and a preparation method of the surfactant. The surfactant is prepared from raw materials as follows: mineral oil, n-butyl alcohol oleate, liquidparaffin, methyl silicone oil, an emulsifier and ethyl p-hydroxybenzoate, wherein the mineral oil is one or two of No.5 white oil and No.7 white oil. The preparation method comprises steps as follows: the mineral oil, n-butyl alcohol oleate, liquid paraffin, methyl silicone oil and the emulsifier are added to a reactor and are sufficiently mixed and stirred; the materials in the reactor are heated and emulsified; ethyl p-hydroxybenzoate is added at certain temperature, the materials are sufficiently mixed and stirred, and the surfactant is obtained after cooling. The surfactant is good in performance and prepared with a simple process, has higher resistance to compression and guarantees that the drilling fluid has lower circulating density and higher suspended rock debris carrying capacity at the shaft bottom under high pressure, complex underground accidents are avoided or reduced effectively, and drilling quality and efficiency are improved; the surfactant still has good performanceat high temperature, can be resistant to 10% compound brine pollution and has good inhibiting performance for lubrication.

The invention belongs to the technical field of metamaterial structures, and discloses a three-dimensional negative Poisson's ratio structure, an additive manufacturing method, a 3D printer and an application, and the isotropic three-dimensional negative Poisson's ratio structure is obtained by arraying a plurality of basic unit bodies. Each unit body is provided with a hollow inner concave body and six connecting bridges; eight vertexes of the hollow inner concave body are in the shape of a triangular bearing table in three directions respectively, and the middles of the six inner concave surfaces are in the shape of a square bearing table; and one ends of the six connecting bridges are connected with the square bearing table in the middles of the inner concave surfaces, and the other ends extend out of the hollow inner concave bodies. The three-dimensional negative Poisson's ratio structure with the isotropic height in each direction is highly symmetrical in each direction, does not show mechanical property difference due to different directions, has the characteristics of isotropic height in each direction and good multi-working-condition penetration resistance, and can show a negative Poisson's ratio effect in each direction.

The invention discloses a construction method of a stress absorption band. The stress absorption band is arranged at the joint part of a new road and an old road, namely from the top surface of a roadbed to the underside of a newly paved oil surface, the stress absorption band is arranged into an inverse trapezoid or an inverse triangular groove, and the groove is filled with asphalt macadam. The stress absorption band is arranged at the joint part of the new road and the old road, can absorb and reduce stress, and prevent road surface diseases caused by the stress at the joint part of the new road and the old road.

The invention provides a surfactant for drilling fluid and a preparation method of the surfactant. The surfactant is prepared from raw materials as follows: mineral oil, n-butyl alcohol oleate, liquidparaffin, methyl silicone oil, an emulsifier and ethyl p-hydroxybenzoate, wherein the mineral oil is one or two of No.5 white oil and No.7 white oil. The preparation method comprises steps as follows: the mineral oil, n-butyl alcohol oleate, liquid paraffin, methyl silicone oil and the emulsifier are added to a reactor and are sufficiently mixed and stirred; the materials in the reactor are heated and emulsified; ethyl p-hydroxybenzoate is added at certain temperature, the materials are sufficiently mixed and stirred, and the surfactant is obtained after cooling. The surfactant is good in performance and prepared with a simple process, has higher resistance to compression and guarantees that the drilling fluid has lower circulating density and higher suspended rock debris carrying capacity at the shaft bottom under high pressure, complex underground accidents are avoided or reduced effectively, and drilling quality and efficiency are improved; the surfactant still has good performanceat high temperature, can be resistant to 10% compound brine pollution and has good inhibiting performance for lubrication.

The invention provides a steam injection method for heavy oil thermal recovery wells. The thermal recovery well includes a vertical well section and a horizontal well section connected to the vertical well section, and the steam injection method includes: step S10: judging the production degree of each part of the horizontal well section; step S20: injecting steam into the horizontal well section; Step S30: continue to inject steam into the part with low production degree of the horizontal well section, and inject inert gas into the part with high production degree of the horizontal well section. The application of the technical scheme of the invention can solve the problem of poor production effect caused by unbalanced production degree of heavy oil thermal recovery horizontal wells in the prior art.

The invention relates to a recyclable microbubble drilling fluid which comprises the following components in parts by weight: (1) basic mud containing 3-6 parts of bentonite, 0.1-0.4 part of sodium carbonate and 100 parts of clear water; (2) a treating agent containing 0.5-1 part of foaming agent, 0.3-0.8 part of foam stabilizer, 0.05-0.3 part of foam enhancer, 2-4 parts of filtrate reducer, 0.1-0.3 part of inhibitor and 0.3-0.7 part of flow pattern modifier. The microbubble drilling fluid disclosed by the invention can resist the temperature up to 135 DEG C, is stable in foams and strong in resistance to compression, salt and carbon pollution, keeps lower density under the high pressure condition in a shaft bottom, has a good effect on inhibiting hydration of mud shale.

An image resampling operation interpolation type identification method: the image resampling operation is represented as a model; an initial blind deconvolution operation is performed on the resampled image to obtain an initial kernel; initial kernels of different sizes are obtained to obtain a set of Multi-scale, different sizes of convolution kernel sets; then use a convolution kernel in the convolution kernel set and the original image corresponding to the convolution kernel to perform convolution, and compare with the resampled image, where the quality difference The smallest is the optimal core, which is the system output; the optimal core H * Expand it into a column vector; put the column vector into the classifier to train the model to obtain a classification model; repeat the above steps 1 to 5 for the image to be tested, and put the obtained column vector into the one obtained in step 6 The classification model is tested to obtain the final detection result. The detection feature dimension of the invention is low, and can effectively reduce the training time for the support vector machine (SVM) classifier. And the ability to resist compression is strong, and has excellent detection accuracy.

The invention provides a preparation method of modified hexanitrohexaazaisowurtzitane, the modified hexanitrohexaazaisowurtzitane and application of the modified hexanitrohexaazaisowurtzitane. The preparation method comprises the following steps: mixing an epsilon-hexanitrohexaazaisowurtzitane crystal, dopamine or a dopamine derivative and a buffer solution, and continuously introducing air to obtain the modified hexanitrohexaazaisowurtzitane. According to the method, the reaction time of dopamine auto-polymerization is greatly shortened, coating is more uniform, and meanwhile, coating thickness is increased and controllable. Compared with a used epsilon-CL-20 crystal raw material, the modified epsilon-CL-20 crystal treated by the method provided by the invention has the advantages that the crystal transition temperature of the modified epsilon-CL-20 crystal can be increased by 40 DEG C or more, solubility in ethyl acetate can be reduced by 30-50%, compression resistance can be increased by 37% at most, and the modified epsilon-CL-20 crystal is more suitable for cast explosives.

The invention discloses a method for hiding high-capacity compression-resisting image information; a criterion for classifying sub-images is provided, before embedding the information, carrier sub-images are classified according to characteristics thereof, the optimal sub-image is selected out to hide information, and thereby information hiding performance is effectively improved. In order to further increase robustness of information hiding, a method of reinforcing bit is skillfully provided, correctness of extracting secret information can still be ensured under the condition of being compressed at a large compression ratio, the maximal relative hiding capacity can be up to 1 / 8, and the maximal compression-resisting time can be up to 20 times and even higher. The secret information and the carrier images can be recovered in a high-quality mode under the condition of achieving two-time compression to sixteen-time compression of a JPEG2000 algorithm, wherein the typical value of PSNR of the recovered carrier image is 40dB.

The invention provides a microbubble drilling fluid, comprising: a base fluid; a treatment agent; the treatment agent includes: a foam enhancer and a wall-protecting agent. The key components of the micro-bubble drilling fluid provided by the present invention are the foam enhancer and the wall-protecting agent. The foam enhancer can synergize with the foaming agent, increase the wall thickness of the micro-bubble, improve the air core sealing performance in the micro-bubble, and enhance the The stability and compression resistance of microbubbles under high temperature and high pressure conditions; the wall protective agent can bond and form a film on the surface of the wellbore to seal the microfractures in the wellbore, thereby synergizing with the microbubbles and significantly improving the bearing capacity of the microbubble drilling fluid. It can improve the plugging performance and reduce the probability of drilling fluid leakage during drilling in low-pressure and leak-prone formations. The outstanding advantage of the microbubble drilling fluid provided by the invention lies in its good leak-proof properties, and is especially suitable for low-pressure and leak-prone formations.

The invention discloses a method for hiding high-capacity compression-resisting image information. According to the method, firstly, a carrier image is sampled and is decomposed to acquire sub-images which are same in size and do not mutually overlap; secondly, several sub-images are preferentially selected from the sub-images and serve as carrier sub-images, and the rest of the sub-images serve as source images used for carrier recovery. Firstly, encoding and scrambling are conducted on embedded information; secondly, one or more digits among four high digits in the carrier sub-images are hidden with a foundational hiding method, and sub-images which contain secret information and sub-images which do not contain secrete information are reconstructed to form an image which contains secret information to be transmitted; received images are decomposed by a receiving end, the secret information is extracted from the sub-images which contain the secret information, and the sub-images which do not contain the secret information are predicted in an interpolation mode to recover carrier images. The method has the advantages of being large in hiding capacity, strong in compression-resisting capability and low in complexity, can recover the secret information and the carrier images in a high-quality mode under the condition of achieving two-time compression to eight-time compression of a JPEG2000 algorithm, wherein the maximum relative hiding capacity can reach one eighth and the typical value of the PSNR of carrier image recovery is 40dB.