52results about How to "Good channel" patented technology

The invention discloses a flame retardant form-stable phase-change material and a preparation method thereof. The method is characterized in that 50-60 percent (accounting for the mass percentage of the whole system) of paraffin, 15-20 percent of intumescent flame retardant, and 1-10 percent of metal powder are mixed evenly and then added into 15-20 percent (accounting for the mass percentage of the whole system) of molten high-density polyethylene; after melting and blending, the obtained mixture is melted and extruded by an extruder, and carries out granulation and molding, so as to obtain the flame retardant form-stable phase-change material in a space mesh structure which is formed by the intumescent flame retardant, the paraffin and the metal powder that dispersed in the high-density polyethylene evenly. As the invention adopts synergistic flame retardance of the intumescent flame retardant and the metal powder, the addition of the intumescent flame retardant is greatly reduced, the flame retardance and the thermal conductivity of the form-stable phase-change material is improved, and the popularization and application of the phase-change material in the industries of building energy-saving materials, solar energy storage materials and heat storage tempering textile materials can be greatly expanded.

The invention relates to a nickel foam-loaded silver-doped nickel-based bimetallic hydroxide electrocatalytic hydrogen evolution catalyst and a preparation method thereof. The catalyst takes foam nickel as a carrier, nickel-based bimetallic hydroxide of a laminated structure is uniformly arranged and grows on the surface of foam nickel, and nano-silver particles are uniformly attached to the surface of the nickel-based bimetallic hydroxide. The nickel foam-loaded silver-doped nickel-based bimetallic hydroxide electrocatalytic hydrogen evolution catalyst takes three-dimensional porous foam nickel of a net structure as a carrier, the nickel-based bimetallic is combined with the carrier firmly, distribution is uniform, the catalyst has the good catalytic hydrogen evolution effect under the alkaline condition, and the stable catalytic activity can be kept in a long time.

The invention relates to a manganese oxide material, and belongs to the technical field of catalytic materials and environmental protection. The manganese oxide material comprises manganese dioxide, wherein the valence form of the manganese element includes divalent manganese and tetravalent manganese; the proportion between divalent manganese and tetravalent manganese is 0<Y(Mn<2+>) / Y(Mn<4+>)<1.The manganese oxide material has a ball-shaped structure formed by nanorods and a favorable pore canal. The manganese oxide material has the advantages that the heat endurance in use is good; the specific surface area is large; the adsorption capability and the ion exchange capacity is strong; the catalytic activity under a high humidity condition is high; the life is long; hazardous materials such as CO (carbon monoxide), VOCs (volatile organic compounds), O3 (ozone) and the like can be solely removed or removed at the same time; staphylococcus and the like can be killed. The manganese oxidematerial preparation method has the advantages of being green and environmentally friendly, simple and easy to perform, extensive in raw material resource, low in cost, and easy for realizing industrialization.

Packets may be routed in a heterogeneous communications network as follows: for a set of packets comprising at least one packet to be transmitted from a sending node, said sending node being able to handle communication according to at least two access technologies, —selecting in a selection unit in the sending node an access technology for use when transmitting the set of packets, —selecting a receiving node in the network to which to transmit the set of packets among nodes in the network that are able to handle said selected access technology—transmitting the set of packets to the selected receiving node using the selected access technology. Alternatively, a set of packets may be transmitted to one or more nodes using at least two different access technologies. Depending on the transmission quality, one node may be selected to forward the set of packets.

The invention relates to a preparation method of an iron, cobalt and nitrogen co-doped carbon nanofiber catalyst. The preparation method comprises the following steps: firstly, preparation of an electrostatic spinning precursor solution, respectively adding cobalt salt, zinc salt and iron salt into an organic solvent to obtain a solution A, and adding a high polymer into the organic solvent to obtain a solution B; adding the solution A into the solution B and uniformly mixing; secondly, preparation of polymer nanofibers: preparing the polymer nanofibers by using an electrospinning technology and the electrostatic spinning precursor solution; thirdly, preparation of a catalyst: carrying out heat treatment on the polymer nanofibers to obtain the catalyst. Compared with the prior art, the preparation method of the iron, cobalt and nitrogen co-doped carbon nanofiber catalyst, disclosed by the invention, has the advantages of simple steps, easiness in operation and controllable implementation conditions; the iron, cobalt and nitrogen co-doped carbon nanofiber catalyst can be obtained without a template or activation etching; in addition, the iron, cobalt and nitrogen co-doped carbon nanofiber catalyst has oxygen reduction performance similar to that of commercial platinum carbon, and has the advantages of low cost, high efficiency, no pollution and capability of being used as a cathode catalyst for an alcohol fuel cell.

The invention discloses an HF (High Frequency) radio state networking method based on a resource distributing policy. The network is of a star topologic structure which comprises a central part and peripheral nodes. The central part comprises a network controller and a group of HF transmitters and a group of HF receiver, respectively connected with the network controller. The peripheral nodes comprise a half-duplex HF radio station for executing the steps of uploading service data and control signaling of the peripheral nodes and receiving the commands and the control signaling of the central part. The central part is used for receiving centralized service data and control signaling of the peripheral nodes and issuing the commands and the control signaling of the central part. The network controller controls the work state of the HF transmitters and the HF receivers. The transmitter, the receiver and communication frequency possibly used form a resource pond, and uplink and downlink frequencies are selected through uplink and downlink chains. According to the method provided by the invention, the performance is reliable, and the network has good expandability.

The invention belongs to the technical field of biomass carbon materials, and in particular relates to a lignin porous carbon nanosheet, a preparation method thereof, and an application in supercapacitor electrode materials. The preparation method of the present invention carries out layer-by-layer self-assembly of sulfonated lignin and oxalate in a selective solvent to prepare a layer-by-layer self-assembled lignin / oxalate composite, which is carbonized and pickled to obtain porous lignin carbon nanosheets. The invention provides lignin porous carbon nanosheets prepared by the above method, and its specific surface area ranges from 200 to 1500m 2 / g, the micropore specific surface area ranges from 100 to 500m 2 / g, the mesopore specific surface area ranges from 100 to 1000m 2 / g, pore size 0.5~30nm, pore volume 0.5~1.5cm 3 / g; can be applied to supercapacitor electrode materials, showing higher specific capacitance and excellent rate performance (76.6% specific capacitance retention rate), and has good potential application value.

A user device includes a display screen and one or more processors. The display screen is configured to display content to a user. The one or more processors are configured to pre-load a user application by running at least part of a program code of the user application in a background, including enabling the program code of the user application to pre-render a visual display of the user application in the background, and, in response to the user accessing the user application, to transfer the pre-rendered visual display to a foreground, thereby displaying the visual display to the user on the display screen.

The invention discloses a telescopic chassis and belongs to the field of crawler type engineering machinery. The telescopic chassis comprises a middle underframe; a left crawler beam and a right crawler beam which are of the same structure and symmetric are arranged on the left side and the right side of the middle underframe correspondingly. A telescopic oil cylinder is arranged between the left crawler beam and the right crawler beam. The two ends of the telescopic oil cylinder are connected with the left crawler beam and the right crawler beam correspondingly. The left crawler beam and the right crawler beam can be driven by the telescopic oil cylinder to reciprocate so that different track gauges of the chassis can be changed according to needs, and the usability of crawler engineering machinery is improved.

The invention discloses a three-dimensional comprehensive, efficient and accurate treatment technique for a coal oil-gas coexistent mine. The technique comprises the following steps: S10, calculatingcoal seam gas geological reserves and surrounding rock oil-gas geological reserves; S20, establishing a reasonable borehole arrangement parameter model; S30, constructing a directional long borehole along the coal seam in the coal seam, and performing sectional hydraulic fracturing construction; S40, comprehensively evaluating the treatment effect by monitoring drainage data and combining with parameters such as drainage up-to-standard period, and providing a design basis for the treatment area under similar geological conditions. A multi-dimensional surrounding rock oil-gas-coal seam gas comprehensive drainage control technique aiming at disasters of the coal oil-gas coexistent mine is formed, dynamic space-time three-dimensional drainage of mining space disaster gas is achieved, mining efficiency and gas drainage efficiency are improved, and the problem of mine gas disaster is fundamentally solved.

A user device includes a memory and one or more processors. The memory is configured to store one or more user applications installed in the user device. The one or more processors are configured to run an Operating System (OS) of the user device, including maintaining a data structure that tracks activity of the user applications, and to pre-load a user application before the user application is accessed by a user, including preventing the data structure from tracking the pre-loaded user application.

The invention belongs to the technical field of zinc ion batteries, and particularly relates to a diaphragm used for a zinc ion battery. The diaphragm comprises a diaphragm base and a coating layer arranged on at least one surface of the diaphragm base; the diaphragm base is an adsorptive glass fiber mat type diaphragm; and the coating layer is an oxide layer. Compared with the prior art, the diaphragm has the advantages of high safety, puncture resistance, high liquid retention and high porosity. Moreover, the invention also discloses a preparation method of the diaphragm.

The invention provides a preparation method of an in-situ growth silicon carbide nanowire-reinforced porous carbon composite, and belongs to the field of aerospacecraft thermal protection systems. The method includes the steps that short carbon fibers and phenolic resin particles are added into a hydroxyethyl cellulose dispersant, stirring is carried out, a uniform solution is obtained, the solution is added into a vessel with a gypsum block, water absorption is carried out, a mass with the short carbon fibers mingled with the phenolic resin particles is formed, drying, solidification and carbonization are carried out, and a porous carbon composite blank is formed; silicon powder is put into a vessel, the porous carbon composite blank is added into the silicon powder, the mixture is heated to 1500 DEG C under the vacuum or inert gas condition, heat preservation is carried out for 30 min, and a blank with silicon carbide nanowires is generated; the blank is put into a phenolic resin solution, vacuum impregnation is carried out, airing, solidification and carbonization are carried out, and the silicon carbide nanowire-reinforced porous carbon composite is obtained. The method solves the problem that silicon carbide nanowires are difficult to disperse in preparation of a silicon carbide nanowire-reinforced porous carbon composite, and wide application prospects of the method are guaranteed.

The invention discloses a carbon nanotube self-assembly nanofiber felt, a preparation thereof and an application in an all-vanadium redox flow battery. The carbon nanotube self-assembly nanofiber felt is prepared by taking a carbon nanotube as a body and macromolecule polymer as an assembly agent according to an electrostatic spinning method. A diameter of an optical fiber is 100-1000nm, a specific surface area is 30-1000m<2>.g<-1>, and the porosity is more than 90%. The carbon nanotube nanofiber felt material prepared by the preparation method is applied to the all-vanadium redox flow battery, and the excellent electrochemical performance is shown up. The carbon nanotube self-assembly nanofiber felt has the advantages of excellent preparation performance, simple technology, good technological repeatability, low cost and environmental friendliness.

A user device includes a memory and one or more processors. The memory is configured to store one or more user applications installed in the user device. The one or more processors are configured to select one or more operations, which are to be performed in normal launching of a user application but not in background pre-loading of the user application, to pre-load the user application before the user application is accessed by a user, including skipping the one or more selected operations, and to complete the one or more skipped operations in response to the user accessing the user application.

The invention provides a preparation method of a membrane, wherein the preparation method comprises the steps: mixing a metal organic framework material with a polymer and a pore passage protective agent, and melting and stirring at a first temperature until the materials are uniformly mixed to obtain a molten mixture; carrying out hot-pressing treatment on the uniformly mixed molten mixture at asecond temperature and under a first pressure to obtain a molded initial metal organic framework membrane; and cooling the initial metal-organic framework membrane to room temperature, impregnating the initial metal-organic framework membrane with a pore passage protective agent remover, washing the initial metal-organic framework membrane, and drying the initial metal-organic framework membrane to obtain the metal-organic framework membrane. The method can be used for preparing the metal organic framework membrane with large loading capacity, and the prepared metal organic framework membraneis high in pore channel retention rate and has excellent selectivity and separation performance. Moreover, the preparation method is simple to operate, does not use a substrate and a solvent, saves the cost, and is green and environment-friendly.

The invention discloses a high strength femoral head plasticising material, which comprises the following raw materials by weight part: 15-20 parts of coral knoll, 6-8 parts of cuttlebone, 2-4 parts of polymethyl methacrylate, 5-7 parts of hydroxy apatite, 1.2-1.5 parts of nano cellulose, 2-4 parts of polylactic acid, and 15-18 parts of 1,4-dioxane. In the invention, cuttlebone has reproducibility, provides good tunnel for health development of regenerated tissue and can satisfy the required flexibility; coral knoll is taken as a main material, hydroxy apatite and nano cellulose are added, biology compatibility, bone conduction characteristic and good mechanical strength of the material can be greatly increased, raw material source is abundant, the preparation process is simple, and the high strength femoral head plasticising material has wide application prospect.

The invention discloses a method for processing a heavy hydrocarbon raw material by adopting up-flow reactors. The method comprises the following steps: at least one up-flow reactor is adopted, at least two catalyst bed layers are arranged in each up-flow reactor, and in each catalyst bed layer, a same hydrotreating catalyst is adopted; a carrier of the hydrotreating catalyst is spherical; the diameter of the carrier is 5.0 to 10.0 mm; wherein the carrier at least comprises seven channels penetrating through the carrier; the first channel, the second channel and the third channel penetrate through the sphere center of the catalyst carrier and are communicated with one another, every two channels are perpendicular to each other, the fourth channel, the fifth channel, the sixth channel and the seventh channel are connected end to end and communicated, and the total volume of the channels accounts for 20%-60% of the volume of the spherical carrier. The catalyst prepared by loading activemetal components on the catalyst carrier is high in void ratio, good in permeability and low in bed pressure, is particularly suitable for an up-flow residual oil hydrotreatment process, and has the characteristics of high hydrogenation activity, long service life and the like.

The invention belongs to the technical field of lithium ion batteries, and particularly discloses an MOF uniformly coated lithium ion battery positive electrode material and a preparation method thereof, the preparation method comprises the following steps: S1, at room temperature, adding lithium ion battery positive electrode particles into a 2, 5-dihydroxy terephthalic acid solution to obtain a mixed solution, hydroxyl in the 2, 5-dihydroxy terephthalic acid is combined with residual alkali on the lithium ion battery positive electrode particles to form the lithium ion battery positive electrode particles coated with the 2, 5-dihydroxy terephthalic acid; and S2, adding a metal salt into the mixed solution, and reacting the 2, 5-dihydroxy terephthalic acid coated on the lithium ion battery positive electrode particles with metal ions to generate MOF, thereby obtaining the MOF uniformly coated lithium ion battery positive electrode material. The lithium ion battery positive electrode material uniformly coated with the MOF can be obtained through the preparation method, and the lithium ion battery positive electrode material has high specific capacity, good rate capability and stable cycle performance.

The invention discloses a purple-root water hyacinth-based graded porous carbon material and a preparation method and application thereof in a supercapacitor. The method comprises the following steps:firstly, carrying out closed microwave reaction treatment on purple-root water hyacinth soaked in a potassium salt aqueous solution, conducting drying, then adding a calcium salt, carrying out ball milling, and carrying out high-temperature carbonization to prepare the graded porous carbon. Compared with porous carbon prepared through a traditional chemical activation method, the prepared purple-root water hyacinth-based graded porous carbon has the advantages of larger specific surface area, reasonable pore channel structure and rich pore size distribution; and when the graded porous carbonis applied to a supercapacitor electrode material, a good channel can be provided for rapid diffusion and transmission of electrolyte ions in the electrochemical process, higher specific capacitance and excellent rate capability are shown, and the graded porous carbon has good potential application value.

The invention discloses a residual oil hydrotreating catalyst carrier, a catalyst and a preparation method thereof. The residual oil hydrotreating catalyst carrier is spherical; the diameter is 2.5-10.0 mm; the outer surface of the carrier is provided with a plurality of large pore channels which are not communicated; the sectional area of the large pore channels is gradually reduced from outsideto inside along the radial direction; the area of the bottom surface of each large pore channel is 0.05%-5% of the surface area of the spherical carrier, the area of the total bottom surface of the large pore channels is 5%-50% of the surface area of the spherical carrier, and the longest depth of the large pore channels is 30%-99% of the radius of the spherical carrier in terms of the length of the pore channels in the radius direction of the spherical carrier. The catalyst prepared by loading an active metal component on the catalyst carrier is used in the residual oil hydrotreatment process, has the advantages of high porosity, good permeability, reduced bed pressure and uniform material distribution, is especially suitable for the residual oil hydrotreatment process, and has the characteristics of high hydrogenation activity, long service cycle and the like.

The invention provides a residual oil hydrotreatment catalyst carrier, a catalyst and a preparation method thereof. The residual oil hydrotreatment catalyst carrier is spherical, and the outer diameter of the carrier is 5.0-10.0 mm; the residual oil hydrotreatment catalyst carrier internally comprises at least eleven large pore channels, wherein the first, second, third and fourth large pore channels are arranged in the spherical carrier and are connected end to end to form a circle, a square, a quasi-circle or a quasi-square shape; the fifth and sixth large pore channels are crossed at the center of the spherical carrier, and the first to sixth large pore channels integrally form a pore channel shaped like a Chinese character 'tian' or a pore channel shaped like a Chinese character 'tian'; the seventh large pore channel is intersected with the fifth large pore channel and the sixth large pore channel, and penetrates through the spherical carrier through the sphere center; the eighth large pore channel, the ninth large pore channel, the tenth large pore channel and the eleventh large pore channel extend inwards from the spherical surface and intersect with the end-to-end connectingpositions of the first large pore channel, the second large pore channel, the third large pore channel and the fourth large pore channel respectively; and the total volume of the large pore channelsaccounts for 10-50% of the volume of the spherical carrier. The catalyst prepared by loading the active component on the catalyst carrier has the characteristics of high hydrogenation activity, long service life and the like.