124results about How to "Centralized distribution" patented technology

Methods, systems and computer program products for management of application programs on a network including a server supporting client stations are provided. The server provides applications on-demand to a user logging in to a client supported by the server. Mobility is provided to the user and hardware portability is provided by establishing a user desktop interface responsive to a login request which presents to the user a desktop screen through a web browser interface which accesses and downloads selected application programs from the server responsive to a request from the user on the user desktop screen at the client. The application program is then provided from the server and executed at the client. The application program may further be customized to conform to the user's preferences and may also provide for license use management by determining license availability before initiating execution of the application program. Finally, software distribution and installation may be provided from a single network management server.

The invention discloses a welding device and method for avoiding high-nitrogen steel welding air holes and improving connector strength, and belongs to the technical field of welding. Two welded workpieces are fixed to a first workpiece supporting plate and a second workpiece supporting plate in a butt joint manner. A welded workpiece connector gap is formed between the two welded workpieces. A groove is formed in the front faces of the welded workpieces and the position of the welded workpiece connector gap. The pipe wall of a first water passing copper pipe and the pipe wall of a second water passing copper pipe are closely attached to the two sides of the groove. Magnet exciting coils are arranged on the back faces of the welded workpieces, a laser beam vertically irradiates the front faces of the welded workpieces, a welding gun is arranged on the front faces of the welded workpieces, and the laser beam, the welded workpiece connector gap and the magnet exciting coils are coaxial. The problems that in the high-nitrogen steel welding process in the prior art, gas is prone to being generated, nitride, carbide and carbonitride are likely to be separated out, and the grain of a weld line is thick are solved, accordingly, the mechanical performance of a high-nitrogen steel welding connector is improved, and the tenacity of a welding heat affected zone is improved.

An exhaust system for a motorcycle having an engine mounted on a front half of a body frame of the motorcycle includes a plurality of first exhaust pipes extending from exhaust ports of the engine, a collecting section at which the first exhaust pipes are collected, a second exhaust pipe including a substantially straight portion connected to a downstream side of the collecting section and disposed under a crankcase of the engine, an expansion chamber connected to a downstream side of the second exhaust pipe and located under a rear wheel suspension arranged behind the engine, an exhaust outlet disposed on a most downstream portion of the expansion chamber, and an exhaust throttle valve and an exhaust gas sensor disposed on the straight portion of the second exhaust pipe.

The present invention belongs to the field of heavy oil and residual oil hydrotransforming technology. The heavy oil and residual oil hydrotransforming catalyst has siliceous alumina carrier, relatively strong acidity and especially protonic acid amount higher than that in available residual oil hydrotransforming catalyst. The siliceous alumina carrier is prepared through one colloid forming process, during and after which silicon is added to make alumina possess more strong acid centers and ideal pore structure. The catalyst of the present invention is used in the hydrotransforming treatment of heavy oil, residual oil and other inferior oil material.

The invention provides a method for preparing and separating nano silver particles. The method comprises the following steps of: preparing mixed aqueous solution of AgNO3 and a complexing agent of AgNO3 first, adding a certain amount of surfactant, adjusting the pH value of the system then, stirring the system to completely dissolve the added surfactant, adding a reducer into the solution dropwise with vigorous stirring, controlling the reaction temperature to be room temperature and continuously stirring the mixed solution after the reducer is completely dropped to obtain nano solver sol till the end of the reaction; and adjusting the pH value of the nano solver sol to be subacid or neutral (pH=2-7) by adopting a pH value regulator, allowing solids to be dissolved, separating the solids, washing the solids with an organic solvent, separating the mixed liquid again to obtain 'wet' nano silver particles and drying the 'wet' nano silver particles under vacuum to obtain the nano silver particles. The nano silver particles prepared by the method are small in particle size (less than 50 nanometers), the preparation process has mild reaction conditions (room temperature), and the subsequent separation steps are simple (centrifugal separation is not required).

A forming method of a fin field-effect transistor includes: providing a semiconductor substrate comprising an NMOS (N-channel metal oxide semiconductor) area and a PMOS (P-channel metal oxide semiconductor) area; etching the semiconductor substrate to form a first fin portion in the NMOS area and a second fin portion in the PMOS area; forming a dielectric layer on the surface of the first and second fin portions, with the surface of the dielectric layer being flush with the top of the first and second fin portions; subjecting the second fin portion to second ion implanting to form a second through barrier layer in the second fin portion; subjecting the first fin portion to first ion implanting to form a first through barrier layer in the first fin portion; removing part, of certain thickness, of the dielectric layer so that the surface of the dielectric layer is flush with the surface of the first and second through barrier layers or lower than the first and second through barrier layers. The forming method has the advantages that breakthrough between a source and a drain can be avoided and the performance of the fin field-effect transistor is improved.

The invention discloses a cell-gel material composite microsphere as well as a preparation method and an application thereof and belongs to the field of biomedical materials. The cell-gel material composite microsphere is prepared from a gel microsphere and cells distributed in the gel microsphere. The preparation method comprises the following steps: dispersing a gel material-cell mixed solution in an oily solution, and carrying out emulsification and gelation treatment to obtain the cell-gel material composite microsphere. The cell-gel material composite microsphere is controllable in cell loading ratio, high in cell survival rate, small in volume shrinkage, difficult in breaking, good in transmitting capability of nutrients and metabolites, simple in preparation method and convenient in popularization and application and can also be used for preparing nonhomogeneous hydrogel so as to obtain a material with high biomimetic degree.

The present invention relates to preparation process of hydrocarbon hydroprocessing catalyst, which has gamma-Al2O3 as carrier, VIB and VIII metal as the active component, and Ti, etc as the active assistant, with the assistant Ti being introduced in the pH swinging carbonization process for producing aluminum hydroxide. The process of preparing the catalyst is one complete mixing and kneading process including the steps of introducing Ti to aluminum hydroxide powder via adding Ti salt solution, adding Mo and / or W containing alkaline solution, mixing and kneading until the aluminum hydroxide powder is wetted completely by the alkaline solution, adding Co and / or Ni containing acid solution, mixing and kneading to obtain plastic material, extruding, drying, and roasting to obtain the catalyst. The catalyst has homogeneously distributed Ti component and obviously raised performance.

The invention discloses a hydrotreating catalyst and a preparation method thereof. In the method, a boron aid is introduced by adding stable boron-containing organic compound solution after aluminium hydroxide is gelatinated, so that the boron aid is uniformly distributed in the catalyst and the activity phase transformation promoting effect of the boron acid is enhanced; moreover, the obtained catalyst has a high pore volume, a large specific surface area, an appropriate pore structure and appropriate acidity, enhances the activity and stability of the catalyst and is particularly suitable for the hydro-denitrogenation process of heavy hydrocarbons.

Process of mono-dispersing nano-superfine zirconium anhydride is carried out by dissolving zirconium oxychloride into de-ionized water, adding into zirconium oxychloride solution into ammonia water slowly while agitating to obtain zirconium hydroxide hydrosol, transferring it to filter press, adding into water, washing to obtain zirconium hydroxide powder, putting it into kiln, burning for 4-5 hrs, and crushing by air flow to obtain final product. The mono-crystal granular diameter is 60-100 nm. It has excellent purity, activity and mono-dispersion.

The invention relates to an assessment method for GNSS interoperability, and belongs to the field of satellite navigation systems. The assessment method includes the steps that the position of a GNSS satellite is calculated according to an orbital element, the geometric dilution of precision (GDOP) of the GNSS satellite is calculated, geometric positioning of precision (GNSSP) of a GNSS is calculated, the integrity output parameter horizontal protection level (HPL) is calculated, usability of GNSS performance assessment parameters and continuity of the GNSS performance assessment parameters are calculated, weighted GNSS performance assessment indexes are calculated, single-point assessment interoperability is selected, and global-point assessment interoperability is selected. Along with the increase of the number of systems, the value of GNSSP probability density distribution central point is smaller, and distribution is more centralized.

The invention discloses a data processing method and a server. The data processing method includes: dividing a memory space into M data partitions on the basis of a memory space dimension, wherein the M is a positive integer greater than or equal to 2; determining a reference time slot corresponding to at least two time dimensions on the basis of the at least two time dimensions; acquiring data information; determining at least two reference time slots corresponding to the data information on the basis of the at least two time dimensions; selecting a data partition corresponding to the data information from the M data partitions on the basis of the at least two reference time slots; and storing the data information into the data partition.

A technological method for adjusting the barrier height of a Schottky diode by doping a silicon dioxide film comprises the steps that an N-type single crystal silicon substrate and an N-type single crystal silicon epitaxial layer chip are used as materials, an oxide layer is formed on an N-type single crystal silicon epitaxial layer to be used as a passivation layer, and the thickness of the oxide layer is larger than 400 nanometers; a doping window is formed by primary photoetching; an ion implantation technology is adopted in the doping window for conducting boron doping, and meanwhile the oxide film is grown to form a P-type protecting ring; the main surface of a Schottky barrier window is formed by secondary photoetching; an oxide layer which is doped with the silicon dioxide film and has the surface thickness of 50-300 nanometers is formed on the main surface of the Schottky barrier window in a deposition mode, rapid annealing is conducted under the nitrogen atmosphere to push impurities doped in silicon dioxide towards the N-type single crystal silicon epitaxial layer, and a thin variable doping layer is formed between the oxide layer of the silicon dioxide and the main surface of the N-type epitaxial layer. The barrier height is lowered through the thin variable doping layer.

The invention relates to a robust digital watermark algorithm based on OFDM-CDMA. The robust digital watermark algorithm based on the OFDM-CDMA mainly includes an original watermark processing method and an embedded region and embedded point selecting method. The specific process includes the steps of a, an original watermark processing process which comprises watermark randomizing, OFDM coded modulation and CDMA coding; b, a watermark embedding process which comprises watermark embedded region and embedded position selecting; c, a watermark extracting process. By means of the robust digital watermark algorithm based on the OFDM-CDMA, under the condition of lower watermark redundancy, mean value and variance of error data caused by various attacks can be reduced effectively, distribution of watermark error energy tends to be centralized, influences of the various attacks on the overall watermark are reduced effectively, and robustness of the watermark is improved.

The invention discloses a preparation method of ultrafine cobalt powder. Some prior methods have the disadvantages of higher cost, or existence of discharge problems of ammonia-nitrogen waste water, or coarser cobalt powder particles or difficult acquisition of high-purity products, and the like; and the prior methods are not suitable for large-scale industrialized production. In the invention, the cobalt ore is used as raw material, a spraying and roasting-reducing method is used for preparing ultrafine spherical cobalt powder, and meanwhile, the tail gas generated in the spraying and roasting processes is absorbed, treated and returns to a production system for recycling, thereby shortening the technological processes, reducing the discharge of the waste water and achieving the purposesof environmental protection and large-scale industrialized production of ultrafine spherical cobalt powder.

The invention discloses an asychronous multi-channel stimulation electric acupuncture needle and a preparation method thereof, and belongs to the technical field of medical instruments. The acupuncture needle comprises an acupuncture needle and cylindrical electrode assemblies at two ends, wherein a corresponding laminated metal coats on each cylindrical electrode assembly, and one end of the corresponding laminated metal is provided with a stimulation electrode, while the other end is provided with a welding point; and each cylindrical electrode assembly comprises an insulating layer positioned on an inner layer, a conductor layer positioned in the middle and a protective glue polymer block positioned on an outer layer. Each stimulation electrode on the prepared acupuncture needle is short, the stimulation electrode current distribution is concentrated, the treatment effect is good, and the acupuncture needle can avoid injuring other body structures and tissues as possible.

The invention belongs to the technical field of fuel cells, and particularly relates to an anionic membrane introduced into N-alkyl dual-core imidazolium cations and a preparation method thereof. The preparation method comprises the following steps: expanding a polymer framework by using a proper solvent, then filling a micromolecular raw material used for preparing N-dodecyl dual-core imidazolium cation molecules near the polymer framework, preparing the raw material into the N-dodecyl dual-core imidazolium cation molecules by virtue of generation of a chemical reaction; crosslinking the polymer to ensure that the N-dodecyl dual-core imidazolium cation molecules are wrapped by the polymer; finally, exchanging anions into OH<-> in an alkali liquor with a certain concentration so as to prepare the alkali anionic membrane suitable for being used by the fuel cell. A conventional grafting method of a quaternary ammonium group is combined with introduction of existing N<+> ion groups, so that the problems of poor qualitative change of property of the polymer and crystallinity degree reduction caused by excessive grafting of the quaternary ammonium group can be solved.

The invention discloses a method for preparing small-molecule low peptides of donkey-hide gelatin. The method includes the steps of 1), dissolving the donkey-hide gelatin and configuring the same to a donkey-hide gelatin water solution with set concentration; 2), performing high-pressure hydrolysis by adding acid, namely mixing the donkey-hide gelatin water solution in the step 1) with oxalic acid, adjusting the pH value to 1.5-2.5, and performing high-pressure hydrolysis; 3), pH call back, namely adjusting the pH value of a product after high-pressure hydrolysis to 3.5-4.5; 4), decolorization and removal, namely adding activated carbon for decolorization and removal and then removing the activated carbon to obtain the small-molecule low peptides of the donkey-hide gelatin. An acid environment is made by adopting the organic acid, the oxalic acid is of the weak acid, and peptide bonds among proteins of the donkey-hide gelatin can be fully broken and dissolved into the small-molecule low peptides; the proteins are degenerated rapidly by adopting a high-pressure cooking method to have the peptides bonds broken; the two methods are combined in the method, so that the small-molecule low peptides with small and even molecule weight are favorably obtained, and the small-molecule-weight low peptides can be well absorbed and utilized by the human body.

The invention provides a method for preparing ABO3 perovskite nano powder. The method comprises the following steps: dropwisely adding a B-site element source alcohol solution into surfactant / acetic acid-dissolved deionized water to obtain a mixed solution, adding ammonia water into the mixed solution, and reacting the reaction system at constant temperature to obtain a B-site element hydrous oxide gel; and preparing a B-site element hydrous oxide gel dispersion solution, adding an A-site element source into the dispersion solution, and carrying out hydrothermal reaction under normal pressure to obtain the ABO3 perovskite nano powder. The aqueous gel-normal pressure hydrothermal process and raw materials with lower cost are adopted, and the aqueous reaction is utilized to avoid the toxicity of the organic solvent. The pH value, surfactant amount, reaction raw material concentration, reaction time, reaction temperature and other conditions of the system are regulated to effectively control the size of the product, thereby obtaining the well-crystallized monodisperse perovskite powder with the particle size of 15-300nm.

The invention provides a sparse vegetation height inversion method of a polarimetric SAR interferometry, thereby solving a problem of low inversion precision in the prior art. The method comprises: carrying out horizontal ground interferometric phase correction on a polarimetric SAR interferometry secondary image; acquiring Pauli base vector matrixes of a main image and the corrected secondary image; calculating a polarization coherent matrix set by the Pauli base vector matrixes; according to a vegetation interferometric phase distribution map, carrying out non-neighborhood spatial multi-viewaveraging on the polarization coherent matrix set; calculating an earth surface correlation coefficient matrix and a volume scattering correlation coefficient matrix by the polarization coherent matrix set after the non-neighborhood spatial multi-view averaging; and carrying out inversion on the sparse vegetation height by the earth surface correlation coefficient matrix and the volume scatteringcorrelation coefficient matrix. Therefore, the interference phase difference between the polarization coherence matrices is reduced; and the accuracy of the vegetation parameter inversion is improved. The method can be applied to forest classification and mapping, large-area vegetation detection and high-precision three-dimensional topographic mapping of the complex terrain.

Methods and apparatus, including computer program products, for distributing data in a data management system. The technique includes identifying one or more objects in a central data store for distribution, determining if a routing exists for at least one object of the one or more objects, and distributing the at least one object to one or more target systems specified by the routing. The one or more objects include master data objects for use by all systems in a data management system, and the one or more target systems are part of the data management system.

The invention discloses an annular positive electrode which comprises a main grid and thin grids. The thin grids are a group of concentric rings using a silicon wafer center as circle center. The main grid is of a needle shape with two pointed tips and one wide middle. The main grid divides the thin grids in an equalized manner. The positive electrode of solar cells is designed according to distribution characteristics of silicon wafer thin-layer resistance value after diffusion, electric performance is improved, sintering windows are widened, risk of poor sintering is reduced, overall power distribution is higher and more concentrated, use amount of silver paste is further reduced, and cost is reduced.

The invention discloses a method for preparing a catalyst by hydrotreatment. The method comprises the following steps: gelatinizing aluminum hydroxide and adding a stable boron-containing organic compound solution, introducing a boron auxiliary agent to obtain the boron-containing aluminum hydroxide, mixing active metal ingredients with boron-containing aluminum hydroxide by a wet-mixing-kneadingmethod, three-segment roasting to obtain a catalyst intermediate, dipping the residual partial active metal and loading on the catalyst intermediate, drying to obtain the hydrotreatment catalyst. According to the invention, the boron auxiliary agent and the active metal ingredients are uniformly distributed on the surface of the catalyst, active metal ingredients introduced by two modes has different forms in the catalyst, mutual cooperation enables reduction of activity loss rate of the catalyst, and the running period of the apparatus can be prolonged. The catalyst has the characteristics of large pore volume and large specific surface area, and possesses proper pore structure and acidity, is especially suitable for hydrodenitrogenation process of heavy hydrocarbon.

The invention relates to a preparation method of a negative electrode material for a lithium-ion battery, in particular to a preparation method of a copper-doped lithium titanate negative electrode material. The preparation method comprises the following steps: sequentially adding a lithium source, a titanium source, a copper source and a chelating agent to an organic solvent for mixing, stirring and dissolving; taking out the mixture for standing after 6 hours, forming gel and drying the gel at 100 DEG C for 10 hours to obtain a precursor; and presintering the precursor in a muffle furnace at a constant temperature of 500 DEG C for 2 hours, burning the product at 800 DEG C for 10 hours, cooling the product to a room temperature and grinding the product. The copper-doped lithium titanate sample prepared by the method is fine and uniform in particle; the average particle size is 200-400nm; the degree of crystallinity is good; and the purity is high. The conductivity of lithium titanate is effectively improved by copper doping; and the electronic conductivity and the lithium-ion diffusion rate are improved, so that the rate capability is improved; and the preparation method has very great applicability to the negative electrode material for a power battery.

An aluminium hydroxide particle containing Si and P dispersed on its surface is disclosed, which can be used for hydrorefining the fractional oil or preparing the hydrocatalyst. It is prepared by introducing the cheap Si-contained compound and P-contained compound in the process for preparing the alpha-AlO(OH) type aluminium hydroxide by Co2 method step by step. Its advantages are excellent physical and chemical properties, large pore volume and specific surface area, proper, surface acidity and better peptization.

The invention discloses a titanium tungsten silicon composite powder used for diesel vehicle / steamship tail gas SCR denitration, and a preparation method thereof, and belongs to the field of carrier coating material. The titanium tungsten silicon composite powder used for diesel vehicle / steamship tail gas SCR denitration is capable of avoiding defects of conventional SCR catalysts. The preparationmethod comprises following steps: metatitanic acid is subjected to beating dispersion, and ammoniacal liquor is added to adjust pH value so as to obtain a slurry; metatitanic acid is subjected to beating dispersion, ammoniacal liquor is added to adjust pH value, a tungsten source and a silicon source are added, and heating thermal insulation treatment is carried out so as to obtain a master batch; the slurry and the master batch are uniformly mixed, press filtration is carried out, and obtained filter cake is subjected to calcining, and crushing so as to obtain a finished product. According to the preparation method, raw material quality is controlled, ratio is adjusted, the corresponding preparation technology is adopted, so that the obtained titanium tungsten silicon composite powder isrelatively large in specific surface area, possesses high temperature aging resistance, is wide in catalytic temperature range, is high in nitrogen removal efficiency, low in drying cracking rate, and shedding rate, long in service life, and promising in application prospect.

The invention belongs to the technical field of medicines and specifically relates to a posaconazole orally taken suspension and a preparation method thereof. The preparation method is used for preparing a posaconazole orally taken suspension compound on the basis of a micro-crystallizing technology. The posaconazole orally taken suspension compound comprises the following components in parts by weight: 30-50 parts of posaconazole, 160-402 parts of additives, solvent and aqueous medium, wherein the solvent is one or more of glycerinum, ethanol in volume percentage of 95%, absolute ethyl alcohol, propylene glycol and polyethylene glycol 100 / 400. According to the invention, the posaconazole orally taken suspension is prepared through the micro-crystallizing technology; according to the method, the solubility difference of the drug in different solvents is utilized to quickly and uniformly separate out the main drug particles under low-temperature and strong stirring conditions, the grainsize of the main drug particles is small and the distribution is concentrated; and the required grain size is further achieved by adopting the micro-crystallizing technology, the processing steps aresimple, the processing time is shorter, the process is convenient and quick, no high-temperature operation exists in the whole process, the active ingredients are free from decomposing risk, the product impurities are few and the quality is effectively guaranteed.

The invention discloses a pulverizing and screening device for building waste recycling, and belongs to the technical field of building waste treatment. The pulverizing and screening device for building waste recycling comprises a pulverizing shell, and the pulverizing shell is internally provided with pulverizing rollers with pulverizing teeth, wherein the pulverizing rollers are driven by a drive motor arranged at the outer portion of the pulverizing shell to rotate. The upper end and the left end of the pulverizing shell are provided with a feeding port and a discharging port correspondingly. Through the arrangement of a position control piece, the size of a pulverizing cavity formed between the position control piece and the pulverizing shell can be controlled according to the waste amount, accordingly, waste distribution is centralized, and the pulverizing efficiency is improved. Meanwhile, when the pulverizing process reaches a certain stage, waste intercepted by a screening plate can be guided into a material receiving bag, the waste in the material receiving bag is poured into the pulverizing shell through a charging pipe again, the poured waste in the state can be centralized between the two pulverizing rollers in advance, and the pulverizing efficiency is further improved.

The invention discloses a petroleum wax hydrogenation catalyst and its preparing method, adopting the Si- and P- containing aluminum hydroxide prepared by CO2 netur neutralization process to act as a carrier material of catalyst, where the Si and P auxiliaries are added in steps, some Si- and P- containing compounds mix with sodium meta-aluminate solution to form a glue, some Si-containing compounds are added after the glue is formed or in the ageing process, and most P-containing compounds are added in the process of peptizing or pulping the produced aluminum hydroxide after washed, thus making most Si and P are distributed on the surface of aluminum hydroxide, effectively give full play to the Si and P cooperatively regulating surface physico-chemical property and hole structure of the catalyst. Its preparing process is simple and low-cost. It has good activity and selectivity as processing petroleum waxes including high-melting point petroleum wax.