383 results about "Fragility" patented technology

A system for determining the amount of processing that has been applied to watermarked signal. A steganographic signal is provided that includes an original signal and an embedded fragile watermark. The fragile watermark is characterized by a low energy and a high redundancy in comparison to a robust watermark. The steganographic signal is communicated over a distribution channel to a decoder. At the decoder, a measure of a presence of the fragile watermark in the acquired steganographic signal is provided, along with an estimate of the fragility profile of the fragile watermark for this particular original signal. Based on these factors, a estimate is made of the amount of processing that the steganographic signal has undergone. This processing can include, for example, A/D and D/A conversions, resampling, band-limiting, perceptual compression/decompression, etc. Optionally, the fragility profile is derived prior to the distribution of the content and communicated by the steganographic signal for recovery by the decoder. Furthermore, a robust watermark may be provided in the steganographic signal that, e.g., designates the presence of the fragile watermark to a decoder.

A digital, flat panel, two-dimensional x-ray detector moves reliably, safely and conveniently to a variety of positions for different x-ray protocols for a standing, sitting or recumbent patient. The system makes it practical to use the same detector for a number or protocols that otherwise may require different equipment, and takes advantage of desirable characteristics of flat panel digital detectors while alleviating the effects of less desirable characteristics such as high cost, weight and fragility of such detectors.

The invention belongs to the technical field of carbide ceramics, and concretely relates to a high-entropy carbide ultrahigh temperature ceramic powder and a preparation method thereof. The molecularformula of the ceramic powder is XCy, wherein X is at least two of Zr, Ti, Hf, V, Nb, Ta, Cr, Mo and W, and y is equal to or more than 0.6 and less 1.0. The ceramic powder has a single phase face-centered cubic structure, and has a free carbon content of 0.035 wt% or below. The ceramic powder is prepared through the steps of ball-milling mixing of at least two metal powders and C powder, and pressureless plasma sintering. The high-entropy carbide ultrahigh temperature ceramic powder is a single-phase solid solution, has the single phase face-centered cubic structure, and also has the advantages of low free carbon content, high purity, loose structure, fragility, and facilitation of post-processing applications.

The invention discloses a detection method and a device for effective fractured intervals in an unconventional shale oil and gas reservoir. The method includes: collecting logging information and core sample information of intervals of interest; calculating volume contents of all minerals in rock generating the intervals of interest according to the collecting logging information and the core sample information; calculating the poisson ratio of all mineral constituents in the rock generating the intervals of interest according to the core sample information and rock space volume average elastic parameter models; calculating the fragility index of the rock generating the intervals of interest according to the volume contents of all the minerals and the poisson ratio of all the mineral constituents in the rock generating the intervals of interest; and selecting the intervals of interest with the high rock fragility index in the shale as the effective fractured intervals in the unconventional shale oil and gas reservoir. By means of the detection method and the device for the effective fractured intervals in the unconventional shale oil and gas reservoir, the actual production requirement for selecting the effective fractured intervals in exploration and development of the unconventional shale oil and gas reservoir can be met.

The invention belongs to the technical field of laser rapid forming, and particularly relates to preparation of a solid solution toughened wolfram-base composite material. A preparation method of the solid solution toughened wolfram-base composite material is as follows: original mixed powder comprises W (wolfram) powder and TiC powder, wherein the TiC powder is 1-1.5wt percent of the total content; and the mixed powder is ball-milled in a high-energy mechanical ball mill for 30-45 h, and then the TiC/W composite material is formed by using a selective laser melting process. The parameters of the adopted laser process are as follows: the powder-bed depth is 50-60 Mum, the laser spot diameter is 200-210 Mum, the laser power is 120-140 W, the laser scanning rate is 100-300 mm/s, and the laser scanning interval is 120-140 Mum. According to the invention, the solid solution toughened wolfram-base composite material is successfully prepared through the method that combines high-energy mechanical ball milling and the selective laser melting process, and the fragility of W material is effectively improved.

The invention aims at providing an efficient preparation method for nanostructure oxide dispersion strengthening steel, which adopts an atomization method for direct preparation(for one step) of powder solid solution alloy containing supersaturation solid solution of Y and Ti, so that conventional process for long-time mechanical alloying ball-milling between mother alloy(free of Y and Ti) atomization powder process as well as atomized powder and Y2O3 and Ti is replaced, and necessary microstructure is provided for forming high density nanostructure rich Y-Ti-O precipitated phase in follow-up process. According to the method, the preparation process is simplified, and bad microstructures such as non-nanostructure precipitated phase and the like and degradation of material property caused by long-time ball milling in existing process can be controlled or prevented, the obdurability and radiation resistance and helium fragility resistance of the material can be improved, so that the operation requirement of key structure material of core parts on advanced nuclear reactor is satisfied.

The present invention provides a cyclic olefin addition copolymer which has a reactive silyl group having a specific structure, excels in optical transparency, heat resistance, and adhesion, and is capable of producing a crosslinked product having improved dimensional stability, solvent resistance, and chemical resistance. The present invention also provides a process for producing the cyclic olefin addition copolymer, a crosslinking composition, a crosslinked product and a process for producing the same, and an optically transparent material (transparent resin film) comprising the cyclic olefin addition copolymer. The optically transparent material excels in optical transparency and heat resistance, exhibits improved dimensional stability, adhesion, solvent resistance, and chemical resistance, and is capable of improving fragility and preventing occurrence of cracks in the film.

The invention relates to the field of production of ultrawhite rolled glass, in particular to a preparation method of solar ultrawhite ultrathin glass and a product thereof. The preparation method of the solar ultrawhite ultrathin glass comprises the following steps of: selecting and preparing raw materials; conveying the raw materials; melting; forming glass; annealing; detecting; and cutting and packaging. In the preparation method, iron content is controlled by taking different measures in the steps of selecting and conveying the raw materials, so that iron sulfide in the final solar glass is greatly reduced and the whiteness of the glass is improved; in the melting process, bubbles in the melted glass liquid is reduced by exhausting air and debubbling, controlling temperature and adding a glass clarifying agent, so that absorption rate is reduced and light transmittance is improved; and the annealing step of the glass finished product is a key link of the production process and plays an important role in the quality of the ultrathin glass product, so the defects that the ultrathin glass is easy to harden and easy to break during production and has high fragility are overcome by controlling rolling velocity, temperature and annealing rate in the process of glass forming and glass annealing.

Adhesive compositions, micro-fluid ejection devices, and methods for attaching micro-fluid ejection heads to devices. One such adhesive composition is provided for use in attaching a micro-fluid ejection head to a device, such as to reduce chip bowing and/or to decrease chip fragility upon curing of the adhesive. Such an exemplary composition may include one having from about 50.0 to about 95.0 percent by weight of at least one cross-linkable resin selected from the group consisting of epoxy resins, siloxane resins, urethane resins, and functionalized olefin resins; from about 0.1 to about 25.0 percent by weight of at least one thermal curative agent; and from about 0.0 to about 30.0 percent by weight filler, and exhibit a relatively low shear modulus upon curing (e.g., less than about 10.0 MPa at 25° C.).

The invention provides a novel polypropylene composite and a preparation method thereof. The novel polypropylene composite comprises the following components in content (weight parts): 40-100 parts of modified xylogen grafting polymers, 100-40 parts of polypropylene, 0-20 parts of flexibilizer and 1-5 parts of lubricant, wherein the modified xylogen grafting polymers is obtained by esterifying double-bond esterifying agent with hydroxy in xylogen and grafting modified xylogen and replacing olefin monomers, and fragility of the novel polypropylene composite is reduced while comprehensive mechanical performance thereof is improved by adding the modified xylogen grafting polymers and the flexibilizer. In the novel polypropylene composite prepared by the preparation method, paper pulp and xylogen of waste side products in paper making industry are used reasonably, usage of polypropylene is reduced effectively, and consumption of oil resources is reduced. Accordingly, the novel polypropylene composite has wider popularization prospect.

The invention relates to an oil field fluid loss additive for drilling liquid and its producing method and the application of the treating agent in the process of producing drilling liquid system. The treating agent utilizes the cation monomer dimethyl diallyl ammonium chloride can make the sodium lignin sulfonate and the sulfonated-methyl brown coal graft induced by FeCl3 so as to produce a new fluid loss agent with the resistance to salt and collapse at high temperature. The composed product integrates the brown coal and lignin. The cation introduction improves the resistance to collapse. The weak crosslinking function of the Fe3+ makes the heat resistance improved further based on the brown coal. Therefore, the product can be widely applied in different complicated conditions such as high temperature deep well, gypsum/slat bed, stratum with a bad water sensitivity, fragility stratum and etc. and has a good prospect.

The present invention discloses a shale gas single well geological comprehensive evaluation method. The method comprises the following steps: stratigraphic division and comparison and sedimentary facies analysis; shale gas reservoir forming condition and main controlling factor analysis; shale fragility analysis; evaluation grading according to a shale gas selection region evaluation parameter table suitable for exploration and development of a research region; and finally, optimization of the layer segments of profitability and the ranges of profitability. Through adoption of the technical scheme, the shale gas single well geological comprehensive evaluation method can objectively and roundly evaluate the shale gas single well geological condition and can provide detailed reference data for well exploitation and geological evaluation of adjacent shale gas single wells and shale gas regions in the later period so as to break the limitation of the current evaluation method, define the shale gas single well geological comprehensive condition and avoid unnecessary waste.

The invention discloses a preparing method of difficult dissolving alloy through powder metallurgical technique, which is characterized by the following: selecting titanium hydride and zirconium hydride particle of Fisher grain at 5-10um with maximum particle not more than 10um; preparing TZM modybdenum alloy; dispersing evenly in the sintering course due to little second phase grain size; improving high-temperature property and normal-temperature fragility.

The invention relates to a sponge composite metallic organic framework material for adsorption separation and belongs to the technical field of materials. According to the invention, a two-step in-situ growth method is adopted for loading MOFs (metallic organic framework material) into a duct in a sponge carrier. The MOFs is synthesized from following organic ligands and metal salts, wherein the organic ligands include pyrazine, trimesic acid, terephthalic acid, 2,5-dihydroxyterephthalic acid, and the metal salts include cupric fluosilicate, magnesium nitrate, zirconium chloride, cupric nitrate, chromic nitrate, ferric nitrate, aluminum nitrate and hydrates thereof. According to a preparation method provided by the invention, a large amount of MOFs loaded in the duct in the sponge carriercan be realized; MOFs load rate is high; load is stable; the defects of fragility and easiness in loss of MOFs powder can be overcome; a breakthrough experiment proves that the material provided by the invention has the characteristics of high CO2-absorbing capacity, high adsorption separation selectivity, stable adsorption separation property, and the like.

The invention provides a preparation method of a light-weight intermetallic compound based layered composite material. The preparation method comprises the following steps: with Ti foil and Al foil as raw materials, alternately stacking the pretreated Ti foil and Al foil, keeping the Ti foil at the outmost layer, and carrying out vacuum hot pressing treatment under the conditions that the base pressure is 6.67*10<-3>Pa, the reaction temperature is 640-685 DEG C, the heating rate is 1-10 DEG C/min, the applied pressure is 0-4MPa, and the temperature preservation time is 1-10h. According to the preparation method, the mutually stacked Ti foil and Al foil are subjected to diffusion reaction by using a vacuum hot pressing method to generate an intermetallic compound Al3Ti, and the intermetallic compound Al3Ti and the residual Ti layer are formed into a layered composite material with a Ti layer as a reinforcement body. The intermetallic compound Al3Ti has high strength and hardness, low density and higher fragility, while the Ti layer is the reinforcement body with better toughness, so that the obtained intermetallic compound based layered composite material has high toughness on the basis of high strength.

The invention is a method for improving sheet metal laser hot-bending forming precision. A forming workpiece is fixed on a three-dimensional numerical control platform, continuous laser beams heat the surface of sheet metal along given motion track at a certain scanning speed, different pressures are applied at the distance of about 1 to3 facula diameters behind the laser beams, smaller pressure is applied at the position of greater bending angle, greater pressure is applied at the position of smaller bending angle, so as to reduce the change of bending angle along the heated sheet formed sheet and improving the forming precision of the forming workpiece. The method is applied to high-rigidness and fragility difficultly-deformed sheet high-precision forming, and has broader application prospect in the fields of aerospace, medicine and microelectronics.

A method is provided for measuring real time ambient pressure at a region of interest in a fluid-filled body cavity by introducing into the cavity a composition of gas-containing microbubbles having a predetermined fragility threshold correlating to the rupture response of their capsules to the ambient fluid pressure and/or applied acoustic pressure. An ultrasonic signal is applied at the region of interest at a power level sufficient to destroy the microbubble population having a fragility threshold below the applied power level. The ultrasound backscatter response is detected from the population of intact and disintegrating microbubbles remaining at the region of interest and this backscatter signal is correlated to predetermined acoustic response properties to determine the ambient pressure at the region of interest.

The present invention is generally related to a novel micromachining thermal mass flow sensor and, more particularly, to a device incorporated with high strength and robust characteristics, which therefore is capable of operating under harsh environments. The new disclosed sensor is made of essential material which can provide robust physical structure and superior thermal properties to support the flow measuring operation. The invented thermal mass flow sensor is featuring with the advantages of micro-fabricated devices in terms of compact size, low power consumption, high accuracy and repeatability, wide dynamic range and easiness for mass production, which could avoid the drawbacks of fragility and vulnerability.

The invention relates to the field of glass, and discloses a glass composition, alkali silicate glass, and a preparation method and application thereof. The composition is prepared from the following oxides in percentage by weight: 40-80 weight percent of SiO2+B2O3+P2O5, 3-25 weight percent of Al2O3, 10-25 weight percent of Li2O+Na2O+K2O, 0-15 weight percent of MgO+CaO+SrO+BaO, 0-5 weight percent of ZnO, and 0-5 weight percent of RE2O3, wherein the composition contains at least one of B2O3 and P2O5, and contains at least one of ZnO and RE2O3. The alkali silicate glass has low fragility, good strength and good toughness.

The invention provides a heat treatment technology for improving the surface hardness of a precise rolling ball bearing. The heat treatment technology includes the steps of quenching-tempering treatment, processing-shaping, cleaning-drying, and nitriding treatment in sequence. The heat treatment technology is characterized in that nitriding treatment adopts three-stage nitriding, wherein a low-temperature high-nitrogen type is adopted in the first stage, a high-temperature high-nitrogen type is adopted in the second stage and a high-temperature low-nitrogen type is adopted in the third stage. The heat treatment technology can remarkably restrain various factors causing material fragility in a nitride layer of GCr15 steel and avoid the formation of Zeta phase (Fe2N), thus greatly improving the quality of the precise rolling ball bearing after nitriding treatment and remarkably lowering the rejection rate of the precise rolling ball bearing.

The invention belongs to a power grid energy storage planning field, and particularly relates to an active power distribution network energy storage planning method based on a fragility theory. The active power distribution network energy storage planning method is characterized by comprising the following steps: firstly determining the parameter information and control variable of an AND energy storage planning model based on the fragility theory; then taking the initial set Omega g composed of all energy storage installation nodes to be selected in a determined representation system as the control variable of an energy storage configuration node range model, using comprehensive fragility variable delta R before and after system placement energy storage as an evaluation index, researching the fragility degree of each node in an active power distribution network, and determining the range of the energy storage installation nodes to be selected in the system; establishing the AND energy storage planning model based on the fragility theory; and finally carrying out iterative solving on the energy storage planning model by using a pre-defined algorithm. According to an energy storage location planning model based on the fragility theory provided by the invention, the two aspects of economical efficiency and improvement on system fragility can be taken into account comprehensively, and the obtained planning scheme has relatively high application value.

The invention discloses a WC composite guide roller and a manufacturing method thereof. A composite layer is arranged on the surface of matrix steel of the composite guide roller. The WC composite guide roller is characterized in that the matrix steel is carbon steel or alloy steel containing 0.2-0.7 percent by weight of carbon; the composite layer comprises the following material components in percentage by weight: 10-50 percent of WC, 0.2-0.8 percent of C, 0-3.0 percent of Cr, 0-2.0 percent of Mo, 0-2.0 percent of Mn, 0.11-0.5 percent of RE, not more than 5 percent of other metallic and non-metallic elements and the balance of Fe. The manufacturing method of the WC composite guide roller comprises the following steps of: coating composite powder on the surface of the matrix steel by using an plasma coating method and enabling the composite powder to be remelted together with the matrix steel by using an argon arc remelting method so as to form the composite layer on the surface of the matrix steel; or directly spraying the composite powder on the surface of the matrix steel and enabling the composite powder to be remelted together with the matrix steel by using the argon arc remelting method. The composite guide roller has high rigidity, good abrasion resistance, low fragility, capability of thermal treatment and mechanical machining, low cost and high cost performance.

The invention provides a metal ceramic cutting tool. The metal ceramic cutting tool comprises the following compositions in percentage by weight: 30-60% of TiCN, 5-15% of TiB, 0-3% of VC, 10-20% of MoC, 0-10% of Ni, 0.5-5% of Cu, 0-15% of WC, 5-30% of Al2O3 and 0-10% of TaC. The invention also provides a method for preparing the metal ceramic cutting tool. In the metal ceramic cutting tool provided by the invention, through carrying out appropriate selection on the types and contents of the compositions, hard phases and bonding phases in the metal ceramic cutting tool provided by the invention both can form mutual element diffusion in an interface, and do not have a severe chemical reaction, so that the generation of fragility phases and the deterioration of interface properties are prevented, thereby ensuring that both the overall performance and service life of metal ceramic cutting tool provided by the invention are effectively improved, and the application area is greatly expand.