50results about How to "Flat distribution" patented technology

A method for manufacturing a uniform-density vacuum insulated panel with a high production efficiency includes steps as follows: (1) a non-woven fabric bag of a specification and a size are made by a bag making machine, and one edge is left unsealed; (2) the non-woven fabric bag is filled with a core material and the unsealed opening is sealed; (3) the core material in the non-woven fabric bag is evenly spread in the non-woven fabric bag by a jolt flattening machine; (4) the core material is sent into a compacter by a conveyor belt, and is compacted; and (5) the core material is loaded into a gas blocking bag, and then the gas blocking bag is subjected to vacuum pumping by vacuum pumping equipment until reaching 0.02 pa, and then is sealed. The method has the advantages as follows: weighing bagging ensures the precision of product specification; the jolt equipment spreads the core material to be more evenly and flatly under the action of gravity; the step of shaping compacting is carried out after the non-woven fabric bag is filled with the core material, so that the condition that the corner formation of the core material is damaged easily when the core material is coated with the non-woven fabric bag after the step of shaping compacting is avoided, and the yield is improved; and the method is suitable for automatic production, and greatly improves the production efficiency.

The invention discloses a Brillouin optical time domain analyzing and sensing system based on ultra-long annular laser pumping. The Brillouin optical time domain analyzing and sensing system based on the ultra-long annular laser pumping comprises first-order raman pump light (16) with the wavelength of 13 xxnm, a wavelength division multiplexer WDM pair (17) and a sensor fiber (18), wherein the wavelength division multiplexer and the sensor fiber form an ultra-long distance annular laser resonant cavity, the first-order raman pump light is fed back by the annular laser resonant cavity to generate lasing light with the wavelength of 14 XXnm. The lasing light with the wavelength of 14 XXnm performs second-order raman amplification on probe light with wavelength of 15 XXnm and Brillouin pumping. In comparison with a Brillouin sensing system based on linear cavity amplification, sensing signals are distributed more smoothly along the optical fiber, and the consistency of sensing quality in the whole process is remarkably improved; noise transfer of pumping-signal relative strength can be effectively suppressed, and temperature, spatial resolution of strain detection and measurement accuracy can be substantially improved; due to the fact that an extra second-order pump light source does not need to be added, substantial stretching of the sensing distance is obtained with low cost, and the Brillouin optical time domain analyzing and sensing system based on the ultra-long annular laser pumping has certain practicability.

The invention discloses a method and system for improving sensing performance of a long-distance Brillouin optical time domain analysis system. On the basis of the existing long-distance Brillouin optical time domain analysis system which uses a first-order Raman amplification technique, a pair of optical fiber gratings with peak reflectivity being larger than 80 percent and consistent central reflection wavelength are fused on the two sides of sensing optical fibers to form a long-distance laser resonant cavity. Laser generated by the laser resonant cavity is used as a second-order Raman pump and a first-order Raman pump to simultaneously take an effect of amplifying sensing signals. Compared with a Brillouin sensing system which is based on the first-order Raman amplification, under the conditions of the same pump power, the method and the system provided by the invention have the advantages that higher grains can be obtained and the pump efficiency is improved; the sensing signals are distributed more smoothly along the optical fibers; when the system is used for long-distance temperature/stress sensing, the spatial resolution, the measurement accuracy and the sensitivity of the monitoring system can be greatly improved; and the sensing performance is obviously improved at a low cost without increasing an additional second-order pump light source.

A microstructured optical fiber for generating broadband white light having a core doped with germanium and silica cladding surrounding the core, the cladding including a plurality of holes arranged in the form of a regular mesh, wherein the diameter F of a hole in the cladding, the pitch L between the respective centers of two neighboring holes in the cladding, and the refractive index difference Dn between the germanium-doped fiber core and the silica of the cladding are such that the fiber can generate white light on the fundamental mode over a wavelength band having a width of at least 1000 nm.

The invention provides an image interpolation space completely reversible separable ciphertext domain information hiding algorithm. The method comprises the following steps of: giving out a conditionrequired by a traversal matrix suitable for image encryption, constructing the traversal matrix by utilizing a chaotic pseudo-random number generator, carrying out a decryption algorithm of the traversal matrix and diffusion and restoration of pixels, generating an encrypted image and realizing secret information hiding in an encrypted image interpolation space; according to the invention, the matrix is traversed;, pixel diffusion and interpolation hiding can realize confidentiality of a carrier image and a secret image. The distribution of a ciphertext image histogram and a secret carrying image histogram is uniform. The image is flat, and a decoder cannot obtain the original image and the secret key information from the histogram; Attacks such as statistical characteristics of the plaintext image are well defended. The security requirement of the carrier image is met, meanwhile. The original image can be restored in a lossless mode, secret information can be extracted, watermark extraction and image decryption are independent, completely separated and exchangeable, and the method has the advantage of being high in security.

The invention relates to the field of voice communication, and discloses a residual echo detection method and apparatus. In the invention, according to a voice spectrum statistical characteristic, within a frequency range with a voice signal-to-noise ratio, an average coherent coefficient of several frequency ranges is utilized to replace a conventional full-frequency range average coherent coefficient as a residual echo detection statistical amount. Since in a frequency range with quite low voice energy, the voice signal-to-noise ratio is quite low, a coherent coefficient is greatly influenced by noise; however, in a frequency range with quite high voice energy, the voice signal-to-noise ratio is quite high, and the coherent coefficient is less influenced by the noise. Therefore, the interference resistance of the full-frequency range average coherent coefficient is lower than the frequency range with the quite high voice energy, so that in actual application, the detection method of a selected frequency range can be provided with a quite high interference resistance capability. At the same time, since the calculation of the full-frequency range average coherent coefficient is unnecessary, the complexity of the detection method is greatly reduced.

The invention discloses a thin film sealing and cutting packing method based on a sealing and cutting packing machine. The method comprises the following steps: step 1: conveying a to-be-packed object to a film conveying and film coating device by using a material conveying device; step 2: conveying a thin film by using the film conveying and film coating device to; step 3: conveying the thin film to a lateral sealing device by using the film conveying and film coating device, and laterally sealing the thin film by using the lateral sealing device; and step 4: conveying the to-be-packed object to a longitudinal sealing device by using the material conveying device, conveying the thin film to the longitudinal sealing device by using the film conveying and film coating device, longitudinally sealing and cutting the thin film by using the longitudinal sealing device, separating a part of the thin film, and sealing the to-be-packed object in the separated thin film to complete the package. According to the thin film sealing and cutting packing method disclosed by the invention, the distance between the to-be-packed objects is dynamically adjusted, so that the distance between the to-be-packed objects is controlled within a preset range, so that the thin film can be evenly and smoothly distributed on the to-be-packed object, packing leakage, overlong thin film and other problems caused by distribution difference of the thin film can be reduced, and the packed products are trim and unified.

The invention relates to a method for manufacturing a composite fiber containing a continuous glass fiber. The composite fiber is formed by mutually mixing offline terylene and an online continuous glass fiber; the glass fiber is drawn on line, and the terylene is finished yarn; a plurality of bundles of terylene with different yarn feed angles are drawn to be converged into sheet shapes after being subjected to tension adjustment; and the converged terylene yarn bundles are separated and then compounded with the glass fiber processed with an impregnating compound. The invention has the advantages of simplified process equipment and improved production smoothness; and meanwhile, the introduction of chemical fiber yarn-feed tension adjustment ensures that better practicability and better effect on the baked yarn clew moulding effect are achieved.

The invention relates to a bonding encapsulation structure and method suitable for radio frequency MEMS. The method comprises the steps that organic materials are spin-coated on an encapsulation coverplate and patterned, then Cr and Au are sputtered, and an encapsulation cover plate with the uniformly distributed organic materials and cavities is obtained by using a method that the cavities are etched with a TMHA solution. The cover plate full of the cavities is made from a high-resistance silicon material, and the cavities are obtained through wet etching by using the TMAH solution. By meansof the encapsulation method, the organic materials can be smoothly distributed in a bonding area, the effective bonding area of wafer-level bonding is increased, and then the airtightness, the reliability and other performance of the product obtained after bonding are improved. A low-temperature bonding technology is adopted to conduct low-temperature encapsulation of a radio frequency device, and while good mechanical strength and airtightness are achieved, the requirements for encapsulating the RF MEMS device which is sensitive to temperature are met.

The invention discloses a method for preparing a praseodymium-doped titanium nitride coating on the surface of a medical titanium alloy. The method comprises the following steps: preparing a titanium nitride coating on the surface of the medical titanium alloy by utilizing a magnetron sputtering method; transferring the medical titanium alloy with the titanium nitride coating into a vacuum chamber A of a plasma-immersion-type ion implanter under the condition that a praseodymium target and a sample disk A are respectively arranged at two ends of the inside of the vacuum chamber A; fixing the medical titanium alloy with the titanium nitride coating on the sample disk A; regulating the vacuum degree of the vacuum chamber A under the condition that the praseodymium target is taken as an ion source of a cathode; regulating the rotating speed of the sample disk A and cooling the sample disk A in a water-cooling manner; and then, carrying out praseodymium ion implantation at a room temperature, thereby obtaining the praseodymium-doped titanium nitride coating prepared on the surface of the medical titanium alloy. According to the method disclosed by the invention, the corrosion resistance of the prepared praseodymium-doped titanium nitride coating is obviously superior to that of a common titanium nitride coating; the breeding and the spreading of a large quantity of vascular endothelial cells in the praseodymium-doped titanium nitride coating can be carried out, so that the biological performance of the medical titanium alloy is obviously improved.

The invention discloses a bridge deck leveling device based on bridge construction. The device comprises a driving vehicle, a main body bin is arranged at one end of the driving vehicle, a transmission bin and a motor bin are arranged at the two ends of the interior of the main body bin correspondingly, a connecting frame is arranged at the end, away from the driving vehicle, of the main body bin,a mounting frame is mounted at the bottom end of the connecting frame; scrapers are symmetrically mounted at the two sides of one end, close to the main bin, of the bottom of the mounting frame, anda leveling plate is mounted at one end, away from the main bin, of the bottom of the mounting frame. The whole leveling device is driven by the driving vehicle to move, an operator does not need to manually push the device to move, the labor intensity of the operator is greatly reduced, and the leveling device can conveniently level a concrete pavement; and before the concrete pavement is leveledby the device, the concrete pavement can be subjected to preliminary leveling treatment by utilizing the leveling assembly, and the pavement is leveled through the guide roller and the scraper blade,so that the distribution of concrete on the concrete pavement is smoother.

The present invention relates to the field of packaging machinery, and especially relates to the automatic packaging technical field. An automatic boxing flattening machine comprises a frame, a conveying assembly, a box clamping assembly and a pressing assembly, and is characterized in that the automatic boxing flattening machine also comprises a horizontal moving mechanism and a flattening device. The pressing assembly comprises a box pressing cylinder and a box pressing cylinder fixing plate. When a packaging box reaches a fixed position, box clamping cylinders clamp the packaging box, the box pressing cylinder presses down, and the horizontal moving mechanism drives the flattening device to move horizontally back and forth after the box pressing cylinder is in place. The automatic boxing flattening machine is mainly used for leveling a packaged product after being boxed, the product is flattened and pressed respectively by two groups of cylinders, the product distribution is flat due to flattening action in the horizontal direction, pressing action in the vertical direction can be more direct and efficient, and therefore flattening efficiency can be improved.

The invention provides a degradable antibacterial magnesium alloy and a preparation method of the degradable antibacterial magnesium alloy, and relates to the field of metal biomedical materials. Thedegradable antibacterial magnesium alloy comprises main active elements of Ag, Cu, Zn and Sr, and by means of composition optimization design of the magnesium alloy, the components comprise, by mass,1.35-1.65% of Ag, 0.9-1.1% of Cu, 3.6-4.4% of Zn, 0.9-1.1% of Sr, 0.36-0.44% of Ca and the balance Mg and other inevitable impurities. After the magnesium alloy material implant finishes the action, the magnesium alloy material implant can be completely degraded to avoid secondary operation removal, the medical cost and the pain of patients are reduced, the antibacterial property of the implant isimproved, and the magnesium alloy material implant has the functions of promoting osteoblast formation and inhibiting osteoclast bone absorption; the degradable antibacterial magnesium alloy adopts asemi-solid rheological die casting process, the microstructure of the product is uniformly distributed, the internal structure is compact, the defects of pores, segregation and the like are few, andthe requirements for high quality and high precision of implant products can be met.

The invention discloses a corrosion-resistant coating on the surface of a sintered neodymium-iron-boron magnet and a preparation method of the corrosion-resistant coating. The preparation method comprises the following steps that a neodymium-iron-boron magnet is cleaned with deionized water after being soaked in an alkaline solution, then the neodymium-iron-boron magnet is ultrasonically cleaned with absolute ethyl alcohol after being soaked in an acidic solution to obtain a pretreated neodymium-iron-boron magnet; then the pretreated neodymium-iron-boron magnet is put into an electrolyte prepared from NaAlO2, Na2SiO3 and deionized water, the neodymium-iron-boron magnet is treated by adopting a micro-arc oxidation process, and ultrasonic cleaning is carried out after treatment to obtain a micro-arc oxidized neodymium-iron-boron magnet; and finally, surface treatment is carried out by adopting a pulse plasma explosion process, and natural airing is carried out to obtain the sintered neodymium-iron-boron magnet with the corrosion-resistant coating on the surface. According to the corrosion-resistant coating prepared through the method, the coating and the base body are tightly wrappedtogether, a surface texture structure is distributed evenly, the coating is flatter and more compact, and the surface is free of defects such as melting pits, so that corrosive liquid is greatly prevented from diffusing to the base body, and the corrosion resistance is greatly improved.

The invention discloses an ultra-flat glaze for a ceramic tile, the ceramic tile and a manufacturing method of the ceramic tile. The ultra-flat glaze comprises the following components in percentage by mass: 20-40% of an organic solvent, 40%-70% of inorganic ceramic powder and 8%-25% of a polymer organic dispersant. According to the invention, the inorganic ceramic powder is dispersed by the organic solvent, and the organic solvent is used for replacing a water medium in traditional glaze slip, so oily decorative ink can be covered with the super-flat glaze, and glaze shortage on the decorative ink is avoided; by adding the polymer organic dispersant and the organic solvent into the ultra-flat glaze, secondary agglomeration and flocculation of ultrafine powder particles are prevented, theviscosity of glaze slip is reduced, the flowing property of the glaze slip is improved, the solid content of the ultra-flat glaze is increased, a uniformly-dispersed glaze is formed, and a compact andfine glaze layer is formed on the decorative ink; so an ultra-flat glaze layer can be flatly distributed without a polishing process, ripples are avoided, and the superior product rate of finished ceramic tile products is increased.

A cutting abrasive disk is composed of at least one solidified layer and a layer of abrasive particles embedded in said solidified layer. Its preparing process includes such steps as arranging the abrasive particles on a substrate, forming a basic layer on said substrate for binding said abrasive particles onto substrate, forming a solidifying layer, attaching at least one solidifying layer and one layer of abrasive particles, and removing substrate.