307results about How to "Reduces the possibility of cracking" patented technology

The invention provides a SAPMAC method for preparing sapphire single-crystal with size above 300mm. In a 300mm sapphire single-crystal growing furnace, technical processes of charging as well as melting material, seeding, shouldering, isometric growing, pulling out, cooling, annealing and discharging are finished. On the basis of the existing SAPMAC method, the invention is greatly improved, so that the SAPMAC method of the invention has the advantages of larger size of crystal, higher quality, more reasonable size, higher utilization rate of material, lower unit production cost and the like, and can produce sapphire single-crystal with the size above Phi320*260mm, high purity, low defect density and favorable optical performance; in addition, the SAPMAC method of the invention can better satisfy demand of sapphire single-crystal with large size and high quality by national defense and military industry field as well as civil field, and reduces defect occurrence probability by controlling seeding structure; meanwhile, the SAPMAC method of the invention controls crystal shoulder structure, decreases shoulder stress and lowers possibility of crystal cleavage by changing pulling speed and cooling rate.

The invention discloses modified gypsum-based self-leveling mortar and preparation and application thereof. The mortar can be taken as a self-leveling mortar material for use in indoor ground leveling, and is prepared from modified gypsum, graded sand and a proper quantity of building additives. A method of adding a proper quantity of inorganic materials such as ground steel slag and ground slag and relevant additives is adopted, so that the water consumption of the modified gypsum is lowered, the density of a material is increased, and the water resistance and the mechanical property of the material are improved while high bonding performance of the gypsum-based material is kept. Scarce alpha gypsum or natural anhydrite is not adopted, raw materials are stable and reliable in supply, and more superior cost performance is achieved; wastes such as gypsum of power plants, ardealite, ground steel slag and ground slag are made full use for making a cementing material, so that general recycling of waste resources is realized, environmental pollution is lowered, and meanwhile a tremendous economic benefit is achieved.

The invention relates to a method for safe accessing of a wireless metropolitan area network, which comprises an authenticating step and a session key negotiating step. The authenticating step comprises that: a subscriber station SS sends a request message for access authentication to a base station BS; the BS sends a request message for certificate authentication to an authentication server AS; the AS verifies the request message for certificate authentication and sends a response message for certificate authentication to the BS; the BS verifies the validity of the identity of the SS according to the response message for certificate authentication; if the SS is valid, the BS sends the response message for access authentication to the SS; the SS verifies the validity of the BS according to the response message for access authentication; if the BS is valid, the SS uses the encryption certificate key of the SS to decrypt the material of authentication key. The SS signing certificate in the proposal is used for stating the identity and the SS encrypting certificate is used for encrypting and decrypting the material of authentication key so as to reduce the risk that the key is decrypted; through verifying the certificates of the BS and the SS by the AS, authentication for the subscriber station SS and the base station BS is realized and security level is improved.

The invention discloses a method and a system of generation of a dynamic encrypt key of an encryption secure digital memory card (SD). The method comprises the following steps: a client-side device installed on a client side sends a dynamic encrypt key generating request command to a card issuer side backstage server when a new dynamic encrypt key is needed; the card issuer side backstage server generates a random number and generates a dynamic encrypt key by means of the encryption algorithm according to the random number, a multiaction computer (MAC) on the client side and current time; and then the client-side device acquires the dynamic encrypt key generated by the card issuer side backstage server. According to the method and the system of the generation of the dynamic encrypt key of the encryption SD, dynamic update of the encrypt key is achieved, and safety of encryption is guaranteed.

The embodiment of the invention discloses a method for realizing initial password setting and password validation on a touch screen terminal, concretely comprising the following steps of: setting grids in the password input area and code grids at different positions to form position codes. For password input, the user touches different positions sequentially and the terminal records the corresponding position codes of the positions as the password. For password validation, the terminal compares the pre-set password with the input password. The password validation is successful if the passwords are consistent and is not successful if not. The embodiment of the invention expands the coding scope of the password and improves the concealment of password input so as to lead users to remember the password easily.

The present invention provides a reinforcing method for treating the concrete and masonry structural crack, according to the concrete condition of the crack, a self-pressure crack processor or air compressor is adopted for assorting the pressure generated by equipments of a slurry storing pot and the like, the corresponding grouting material is pressed into the existing crack, after the hardening of the grouting agent the concrete or masonry at the two sides of the crack can be adhered from the inner side namely inner adhering; the high-technique materials of FRP board, sheet material, rod material and the like or the ordinary materials of reinforcing steel bar, steel plate and the like is selected for adhering across the crack or a groove is cut for anchoring, the concrete at the two sides of the crack is connected from the outside namely exterior cramping. The adopting of the method can thoroughly settle the problem of the building structural crack.

The invention discloses a personalized card writing method and system. The method comprises: a subscriber logs in a remote card writing server via a card writing terminal; the remote card writing server distributes personalized data and card writing components required by the subscriber to an intermediate card connected with the card writing terminal, and the intermediate card stores the personalized data and the card writing components; and the intermediate card is connected to a subscriber terminal used by the subscriber, and the subscriber terminal reads the personalized data in the intermediate card, and calls the card writing components in the intermediate card to write the personalized data to a subscriber identity module (SIM) or a universal subscriber identity module (USIM) in the subscriber terminal. The invention simultaneously discloses the remote card writing server, a subscriber card and the user terminal. By adopting the method, system and device provided by the invention, the safety of the service data can be ensured, the realization is simple and convenient, and the service experience of subscribers can be enhanced.

The inner tunnel surface reinforcing and protecting method includes adding polyacrylic emulsion and polyacrylic fiber into waterproof cement mortar to raise the surface strength of inner tunnel surface and to prevent crack, water permeation and high temperature blowout. The method includes the first compounding waterproof cement mortar with cement, sand, water and polyacrylic emulsion in the ratio of 1 to 0.5-0.7 to 0.4-0.6 to 0.005-0.008; the subsequent mixing polyacrylic fiber in the amount of 0.006-0.008 of cement mortar weight with cement mortar to form modified cement mortar; and final spraying the modified cement mortar to the inner surface of the concrete structure. The polyacrylic fiber resists the stresses of cement shrinking in different directions to raise the strength of solidified waterproof mortar and raise the fireproof limit. In addition, the grille net has crack resisting reinforcing effect.

The invention provides an automobile chip wide domain oxygen sensor using standard signal output, which consists of a porous protective layer, an oxygen pump external electrode, an oxygen pump matrix layer, an oxygen pump internal electrode, a reaction matrix layer, an inner reaction electrode layer, a multilayer ceramic gas exchange layer, an upper heating matrix layer, a heating electrode layer, a lower heating matrix layer and heating electrode pins, wherein, the oxygen pump matrix layer and the reaction matrix layer are zirconium oxide substrates stabilized by yttrium oxide; the multilayer ceramic gas exchange layer, the upper heating matrix layer and the lower heating matrix layer are substrates made by compounding aluminum oxide, magnesium oxide and barium oxide according to a certain proportion; and the layers are printed with electrodes, laminated and integrated together by a sintering mode. The substrates made from the aluminum oxide, the magnesium oxide and the barium oxide has good insulating property and the same sintering temperature and thermal expansion coefficient as zirconium oxide, thus lowering possibility that the layers of the automobile oxygen sensor are cracked and disabled owing to thermal shock; and the substrates have good insulating strength, thus reducing interference of voltage of heating electrodes on a signal circuit.

The invention relates to variable thermal-radiating ceramic material and preparation method thereof, in particular to lanthanum strontium manganate (LSMO) -based intelligent thermal-radiating material and preparation method thereof. The lanthanum strontium manganate-based intelligent thermal-radiating material comprises the following components in proportion: La1-xSrxMnO3, wherein x=0.16-0.18; or La1-xCaxMnO3, wherein x=0.20-0.40; or La1-(x1+x2)Srx1Cax2nO3, wherein x1=0.10-0.13 and x2=0.09-0.11.By adopting a sol-gel method to prepare the superfine LSMO-based ceramic powder the granularity of which is less than 100nm, the invention lowers the sintering temperature, shortens the sintering time, improves the uniformity and the flatness of the LSMO-based complex ceramic film and decreases the sintering defect; and simultaneously, the invention reduces the probability that the LSMO-based complex ceramic film strips from a ZrO2 substrate, and reduces the probability that the complex film cracks in the sintering process.

The invention discloses a high-strength mining expansion filling fireproofing and extinguishing material and an application method thereof. The material comprises the following substances in parts by weight: 16-25 parts of aluminate cement clinker, 12-20 parts of Portland cement clinker, 4-16 parts of active calcic material, 6-15 parts of setting accelerator, 5-10 parts of quicklime, 22-40 parts of fly ash, 0.1-1 part of zinc powder foaming agent, 0.5-2 parts of thickening time control agent, 1-2 parts of aluminum hydroxide, 1-3 parts of dispersing agent and a proper amount of sodium hydroxide. By adding the sodium hydroxide, the pH value of the prepared slurry is 12-13. The material can obviously enhance the compression strength of the filled body, can enhance the critical fracture toughness and stability of the filled body, implements long-distance line delivery, and also implement quick filling and high-efficiency fireproofing and extinguishment.

The invention discloses a separating unit of skin, pulp and leaves of a maize straw. The separating unit of the skin, the pulp and the leaves of the maize straw comprises a rack (30) and a power mechanism (1) arranged on the rack, a leaf-removing mechanism, a clamping conveying roller assembly (4), a cutting roller assembly (5), an unfolding roller assembly (6), a flattening roller assembly (7), a pulp-peeling roller assembly (8) and a skin output roller assembly (9) are sequentially arranged on the rack from front to back and are all in transmission connection with the power mechanism (1). The separating unit of the skin, the pulp and the leaves of the maize straw carries out leaf-removing and pulp-peeling operation especially for maize straws, achieves the functions of completely separating the leaves, the pulp and the skin of the maizestraw, and enables the leaves, the pulp and the skin of the maize straw to be effectively utilized respectively. The separating unit of the skin, the pulp and the leaves of the maize straw has the advantages of being low in mechanical vibration, low in noise, small in energy consumption, durable in use, not prone to being wound and stacked, strong in practicality, good in market prospect, and worthy of popularization and application.

The invention provides a preparation method of zirconium oxide aerogel, which comprises the following steps of: dissolving alkoxide into anhydrous ethanol, and stirring and mixing to obtain an ethanol solution containing the alkoxide; dropwise adding concentrated nitric acid, then adding a mixed solution containing deionized water, formamide and epoxy propane, and continuously stirring for 20-60 minutes to obtain clear transparent sols; transferring the sols into a mould, and standing and ageing to obtain ZrO wet gels; respectively soaking the ZrO wet gels at 35-100 DEG C by using ageing liquids; and finally supercritically drying an object obtained by soaking with a drying medium solvent for 2-5 times to obtain a complete block-shaped ZrO aerogel. The method provided by the invention realizes the preparation of the block-shaped ZrO aerogel and solves the technical problem of preparing a low-density medium-intensity block-shaped zirconium oxide; and in addition, the block-shaped zirconium oxide aerogel has the density of 100-250 kg/m<3>, the normal-temperature heat conductivity of 0.018-0.031 w/mk and the compressive strength of 100-300 KPa.

The invention discloses modified desulphurization gypsum-based mater batch and a preparation method therefor. The master batch can replace cement as a gel material in concrete. The master batch comprises the following components in parts by mass: 400-750 parts of desulphurization building gypsum, 50-300 parts of slag powder, 50-350 parts of coal ash and 30-200 parts of cement as well as a proper amount of additives. By adopting a method of adding a proper amount of inorganic materials such as coal ash, slag powder and the like and related additives, the water consumption of the modified desulphurization gypsum is reduced, the compactness of the material is improved, and the water adsorption of the material is reduced, so that the water resistance and mechanical property of the material are improved. By fully using wastes, such as desulphurization gypsum, coal ash and the like, of a power plant to prepare the gel material, comprehensive re-utilization of waste resources is achieved, so that the environmental pollution is favorably reduced, and meanwhile, the master batch has a huge economical benefit.

The invention discloses phosphogypsum-based lightweight heat insulation self-leveling floor mortar, which comprises main materials and building admixture. The main material comprises building gypsum powder, lightweight aggregate, silicate cement, calcium carbonate powder, graded sand; the building admixture comprises a retarder, a water reducing agent, a water-retaining thickener and a leveling agent. According to the mortar provided by the invention, the dried breaking strength of the mortar provided by the invention can reach up to 7.0 Mpa, the dried compressive strength can reach up to 15.0Mpa or more, the dried tensile adhesive strength can reach up 1.1 Mpa and can meet the use requirements of most light load and medium load floors. The gypsum can be recycled, the solid waste furnacebottom slag of thermal power plant is used as the light aggregate, so that the cost is reduced.

The invention relates to a JPEG image encryption transmission method. The method is characterized by comprising the steps that an image receiver and an image sender establish a safety channel and an image transmission channel, the image receiver sends image request data to the image sender through the safety channel, after the image sender receives the image request data, a time-out mechanism is started to read corresponding JPEG image data and process the corresponding JPEG image data, after being processed, the JPEG image data are subpackaged, then encrypted and sent to the image receiver, after receiving the data, the image receiver conducts decryption on the data, the image receiver does not receive the complete image data, an image data request of the missing portion is sent in the time-out mechanism, and the image sender transmits some encrypted and subpackaged data before the time-out mechanism. The method has the advantages of being capable of efficiently conducting encryption transmission on JPEG images, and achieving safe and reliable JPEG image transmission through the smaller amount of calculation and smaller amount of network data transmission.

The invention relates to a silicon negative electrode lithium ion battery, and discloses an all-solid-state battery with a silicon negative electrode and a sulfide solid electrolyte. The battery comprises the negative electrode, a solid electrolyte layer and a positive electrode; the negative electrode comprises a current collector and a lithium intercalated layer which is fixed to the side surface of the current collector in a laminated mode; the lithium intercalated layer is formed by pressing mixed powder comprising sulfide electrolyte powder particles and silicon-containing negative electrode powder; the content of silicon in the mixed powder is 40-53wt%; the particle sizes of the sulfide electrolyte powder particles are 10-100nm; the particle size of the silicon-containing negative powder is 10-100nm; and the porosity of the lithium intercalated layer is 15-23%. The lithium intercalated layer can adaptively adjust expansion/contraction caused in a lithium de-intercalation processof the silicon-containing negative electrode powder, so that the possibility of cracking pulverization of the lithium intercalated layer is reduced, the electric contact between a desulfurization layer and the current collector and between the desulfurization layer and the solid electrolyte layer is stable, the capacity attenuation of the high-silicon negative-electrode solid-state battery is reduced, and the cycling performance of the high-silicon negative-electrode solid-state battery is improved.

The embodiment of the invention relates to a wireless channel switching method and a system therefor. The embodiment of the wireless channel switching method comprises the steps of starting empty encryption and implementing signal switching of a mobile station when reaching preset triggering conditions. The embodiment of the wireless channel switching system comprises the mobile station and a network side device, and the network side device comprises a channel switching device that is used for implementing the channel switching of the mobile station when reaching preset triggering conditions after the empty encryption between the network side device and the mobile station is finished. In the embodiment of the wireless channel switching method and the system, after a network side finishes the empty encryption to the mobile station, the channel switching to the mobile station is implemented under preset triggering conditions so as to transfer the conversation position of the mobile station and increase the cracking difficulty of the conversation by leading a cracker unable to obtain sufficient conversation data, thus lowering cracking possibility and improving the conversation safety between users.

The invention discloses a concrete face for concrete face rockfill dam, which comprises costalia parts on two sides and a main board part arranged in the middle; each of the main board part and the costalia parts comprises an upper part, a middle part and a lower part which are all plane boards; the main board part and the costalia parts form an arced shape; the angles formed by the main board part and the costalia parts are 4 to 12 degree, and the two angles can be different; the main board part and the upper, the middle and the lower parts of the costalia parts also form an arc shape, and the included angles are 3 to 12 degrees; and the panel slits among the face plate units of the main board part and the costalia parts are fold-line type. Compared with the prior art, compression force is generated between the costalia parts and the rack around, so that the peripheral gap can not split; the face plate units in the invention are occluded with each other, so that the face plates are uneasy to conduct fault movement; and under long-term water effect, the peripheral gap and the splits of the face plates are combined together more firmly, and water seepage phenomenon is avoided.

Ni base superalloy components containing relatively large amounts of Al and Ti are known to be difficult to build up by a weld build up process without cracking. As the Al and Ti content of the superalloy is increased to improve the strength, the susceptibility to cracking is increased. It is shown herein that reducing the γ′ phase in the additive built up material improves robustness against cracking. A stepwise, controlled heating and cooling process is described to be used in cooperation with an additive build up process to reduce the γ′ present and thereby reduce cracking.

The invention initially provides a preparation method of a forging mold by using a composite build-up welding and spray welding method, combined with the characteristics of the build-up welding and the spray welding, and aiming at the status quo of the traditional forging mold manufacturing technology in China at present. The method comprises the following steps of: a. forging a forging mold substrate and carrying out thermal refining, wherein an allowance is reserved at a substrate cavity; b. build-up welding uniformly distributed build-up welding transition layers on a specific cavity surface by using an automatic gas shield build-up welding technique; c. forming a surface reinforcement layer on the surface of the transition layer by using a one-step spray welding method; d. finishing the spray welding and carrying out the remelting and warming at once by using a tempering and slow cooling technique; and e. fine finishing, and putting the size of each part of the cavity in place. Compared with the traditional preparation method of the forging molds, the production cost is reduced, the condemnation factor of a product is decreased, meanwhile, the joint strength of the mold substrate and a welding layer is enhanced, the strength and the impact toughness of the mold are improved, the wear-resisting and the thermal fatigue resistance properties of a surface layer are optimized, and the property of the mold surpasses that of the new-made integral molds of 5CrNiMo and 5CrMnMo.