99results about How to "Appropriate density" patented technology

A method for growing single-wall carbon nanotubes involves preparing a catalyst comprising catalytic metals, iron and molybdenum, and magnesium oxide support material and contacting the catalyst with a gaseous carbon-containing feedstock at a sufficient temperature and for a sufficient contact time to make single-wall carbon nanotubes. The weight ratio of iron and molybdenum can range from about 2 to 1 to about 10 to 1 and the metals loading up to about 10 wt % of the MgO. The catalyst can be sulfided. Methane is a suitable carbon-containing feedstock. The process can be conducted in batch, continuous or semi-continuous modes, in reactors, such as a transport reactor, fluidized bed reactor, moving bed reactors and combinations thereof. The process also includes making single-wall carbon nanotubes with catalysts comprising at least one Group VIB or Group VIIIB metal on supports such as magnesia, zirconia, silica, and alumina, where the catalyst is sulfided.

An image synthesization method, whereby a plurality of images, each of which has a partially overlapping image area, are synthesized to create a single synthetic image, comprises a determination step of inputting a plurality of image data sets that correspond to the plurality of images that are input, and of determining whether or not an image in the partially overlapping image area of each of images that are indicated by the plurality of image data sets includes mainly characters an image processing step of performing, for the plurality of image data sets that are input, image processing in consonance with a result of a determination performed at the determination step and an image synthesization step of synthesizing images that are indicated by the resultant plurality of image data, for which the image processing has been performed at the image processing step. With this arrangement, a plurality of images can be easily and effectively synthesized.

The invention provides a cathode rare earth metal electrobath and an electrolysis technique for using the electrobath. The electrobath comprises an anode and a cathode. The cathode is arranged at the bottom part of the electrobath; the electrolyzed single or mixed metals are collected on the cathode; a liquid metal surface is used as the surface of the cathode; the anode arranged above the cathode is connected with a transmission mechanism; the transmission mechanism adjusts the distance between the cathode and the anode. The electrobath is suitable for electrolyzing in a fluoride electrolyzing system to generate the rare earth elements which include generating single rare earth metals of La, Ce, Pr and Nd as well as the mixed rare earth metals between the elements. The distance between the anode and the cathode can be adjusted at any time; the power operating factor and the current efficiency of the electrobath are high; the effective operating factor of an auxiliary material is high; the service life of the electrobath is longer than that of the prior electrobath; the electrobath is suitable for developing on the aspect of large capacity.

The invention relates to a three-dimensional graphene heat-conducting phase-change composite of an arbitrary shape and a preparation method thereof. According to the invention, a three-dimensional structure of any shape is prepared from high-viscosity graphene oxide slurry and then subjected to freeze-drying to prepare a graphene oxide aerogel; then high-temperature treatment is carried out so asto prepare a high-quality three-dimensional graphene aerogel; and then an aerogel system is filled with a phase-change material so as to obtain the heat-conducting phase-change composite with excellent thermal conductivity, high phase-change latent heat, high dimensional stability and cycling stability; and the thermal conductivity of the composite is 2-11 W/(mK), and the phase-change latent heatof the composite is more than 95% of the inherent value of the phase-change material.

The invention discloses a method for preparing an SAPO-34 molecular sieve. The method comprises the following steps of: mixing a silicon source and a phosphorus source; sequentially adding aluminum source serous fluid and an organic amine template agent containing fluoride, and uniformly mixing; aging mixed gel prepared according to the charging sequence for a certain period of time, and raising the temperature to be between 120 and 150 DEG C at the speed of lower than 0.45 DEG C/min; keeping the temperature for a certain period of time, and raising the temperature to 200 DEG C at the speed of lower than 0.30 DEG C/min; performing hydrothermal crystallization at the temperature of 200 DEG C for 24 to 48 hours; controlling the acid strength and the acid density of the synthesized SAPO-34 molecular sieve, and controlling the particle size of the SAPO-34 molecular sieve to be between 2.5 and 3.0 micrometers; and crystallizing the synthesized serous fluid, centrifuging, filtering, washing, drying, roasting, and thus obtaining the SAPO-34 molecular sieve with high crystallinity, suitable acid strength, suitable acid density and a small particle size. The SAPO-34 molecular sieve is used for a reaction of preparing olefin through methanol or dimethyl ether and has high catalytic activity and high ethylene/propylene selectivity.

The invention relates to the technical field of civil engineering construction, in particular to a construction method of an ultra-deep underground diaphragm wall in a water-rich soft-soil area. The construction method comprises the following steps: making an analysis and research on the stability of trench walls of the underground diaphragm wall and doing relevant preparations, preparing wall protecting slurry, building a guide wall, performing trenching construction, wall cleaning and sediment removal, manufacturing and hoisting reinforcing cages, backfilling joints between trench sections, and pouring wall concrete. According to the construction method, through a stability analysis method that introduces strength reduction, the security coefficients of stability of the trench walls are calculated based on a finite difference method; through parameter-reduction circular calculations, not only the limit stress and large deformation state of the trench walls but also the stability coefficients of the trench walls are obtained, which has practice guiding significance in construction; and the results are simple and practical and conform to the habits in the engineering field, and the stability requirements of the trench walls are effectively guaranteed, so that the engineering construction can be completed safely and fast with high quality.

An optoelectronic device includes at least first and second light-emitting nanowires on a support, each comprising an area for the injection of holes and an area for the injection of electrons, a series electric connection including a connection nanowire on the support, which includes a first region forming an electric path with the hole injection area of the first nanowire, a second region forming an electric path with the electron injection area of the second nanowire, and a third region enabling a current to flow between first and second regions. Also included are a first conductive area connecting the hole injection area of the first nanowire and the first region of the connection nanowire and electrically insulated from the second nanowire, and a second conductive area connecting the second region of the connection nanowire and electron injection area of the second nanowire and electrically insulated from the first nanowire.

An X-ray exposure control device comprises: an X-ray detection element including a plurality of pixels for dose detection each detecting a dose during X-ray radiation; a region setting unit configured to set a use pixel region including pixels for use in dose detection from the plurality of pixels for dose detection during the X-ray radiation; a signal generating unit configured to generate a stop signal for stopping the X-ray radiation from an X-ray source according to the dose detected by each of the pixels for use in the dose detection within the use pixel region set by the region setting unit; and a transmission unit configured to transmit to the X-ray source the stop signal to stop the X-ray radiation as generated by the signal generating unit.

The invention provides an automatic layout method of a distribution single line diagram in a grid geographic information system, which mainly comprises the following steps of: an object generating and updating stage: the initial layout of the single line diagram is generated, and space ranges needing to be occupied by each equipment and each branch on a line are calculated by adopting a bottom-up iterative calculation method so as to provide a data support for follow-up space expansion and compression; a space expansion stage: according to the stored object and branch space occupied data in the previous stage, the affected line and equipment are moved, so that the occupied space positions of each branch and equipment are not overlapped; and a space compression stage: according to the adjustment work of the expansion stage, through the heuristic space position occupying judgment, the adjusted space is reversely compressed until the space position is minimized in an allowed range. Through the support of the automatic layout method, the practical initial layout of the distribution single line diagram and the incremental layout adjustment support are provided, and the practical needs of distribution single line diagram functions are met.

Provided is a toner comprising a toner particle including a toner base particle and fine particles present on a surface of the toner base particle, wherein each of the fine particles includes a core fine particle and a condensate of at least one organosilicon compound selected from the group consisting of organosilicon compounds represented by specific structural formulas, the condensate coating the surface of the core fine particle, and in a wettability test of the toner with respect to a methanol/water mixed solvent, a methanol concentration, when a transmittance of light having a wavelength of 780 nm is 50%, is 5.0 to 20.0% by volume:

The invention discloses a preparing method of carbon/carbon thermal insulation cover of single-crystal silicon drawing oven, which comprises the following steps: toroidal-binding with carbon fiber weftless cloth and thin carbon fabric net tyre; needling radially; producing pseudo three-dimensional thermal insulation cover preformed body with low density; vacuum-dipping with furfural ketone resin; hardening; charring; proceeding fine and close fro 2-4 times repeatedly; reaching density not less than 1. 2g/cm3; ending; leading into chlorine gas or Freon; proceeding high-temperature purified treatment; machining; getting the product. This invention possesses the advantages of simple craft, low cost and long durability.

A detection field setting unit of a console sets a detection field of detection pixels of an electronic cassette which are used to detect the dose of X-rays passing through a subject so as to correspond to each irradiation position on the basis of irradiation positions of an X-ray source set by a driving condition setting unit and ROI information such as the position and the size of a region of interest (ROI) of the subject M input through an input device and the height thereof from a radiography platform. The electronic cassette performs an automatic exposure control of detecting the dose of X-rays by the use of the detection pixels in the detection field set by the detection field setting unit of the console and automatically controlling the irradiation dose of X-rays on the basis of the detected dose, when performing a radiographing operation at the irradiation positions.

The present invention relates to a preparation method of C/C insulating bottom plate that is used for a high-temperature furnace. In the method, carbon fiber plain weaves or twill is laid alternately with fetus of thin carbon fiber network; axial needle prick is used for preparing the prefabricated body of the low-density insulating bottom plate; furfural acetone resin or phenolic resin is used for vacuum impregnation, curing, carbonizing and densifing the prefabricated body of the insulating bottom plate; the prefabricated body is repeatedly densified 2 to 4 times until the density reaches more than or equal to 0.50g/cm<3>; after the densification, the prefabricated body is processed through high-temperature purification under the conditions with chlorine or Freon; and the C/C insulating bottom plate, which is used for a high-temperature furnace, can be prepared after mechanical processing. The preparation method has the significant characteristics that: first, the conditions for densification are simplified, the costs are reduced, and the preparation method is suitable for producing large-size products; secondly, the resin carbon-based matrix reduces the thermal conductivity of the C/C insulating bottom plate, improves the effects of heat preservation in the hot field and saves energy; and thirdly, the C/C insulating bottom plate has high mechanical properties, and the service life is prolonged.

The invention relates to a polyimide resin-based structure wave-absorbing material reinforced by nickel cobaltate-silicon carbide fiber multi-scale reinforcement and a preparation method thereof; the preparation method comprises: adding degummed dried silicon carbide fiber cloth in solution A to carry out hydrothermal reaction, taking out the silicon carbide fiber cloth after reacting, and annealing to obtain nickel cobaltate-silicon carbide fiber multi-scale reinforcement, wherein the solution A is made by adding cobalt nitrate, nickel nitrate and urea in water and stirring well; brushing polyamide acid solution evenly to the outer surface of the nickel cobaltate-silicon carbide fiber multi-scale reinforcement, and stacking neatly to obtain a preform; subjecting the preform to a multiple repeat process of vacuumizing, pressure holding, and relief, and performing mold pressing to obtain the polyimide resin-based structure wave-absorbing material reinforced by nickel cobaltate-silicon carbide fiber multi-scale reinforcement. Nickel cobaltate is grown on the surface of silicon carbide fiber, interfacial polarizing capacity and electrical conductivity of the composite are improved, and good wave-absorbing performance and mechanical properties are achieved.

The invention discloses a method for preparing high temperature furnace used carbon/carbon insulating cylinders, which comprises the following steps: preparing a low-density insulating cylinder prefabricated part by adopting the alternative layering and the radial acupuncture of carbon fiber plain cloth or twill cloth and thin carbon fiber net tire; densifying the insulating cylinder prefabricated part by the combination of gas phase sedimentation and resin dipping; sticking graphite paper on the inner surface and the outer surface of the insulating cylinder after the densification process; and then preparing a high temperature furnace used carbon/carbon insulating cylinder by machining after carbonizing, so that, the density of the carbon/carbon insulating cylinder is 0.25 to 0.50 g/cm<3>. The invention has the following advantages: 1, the conditions of the densification technique is simplified so as to reduce the cost, therefore, the invention is suitable for producing large-sized insulating cylinder products; 2, using resin carbon basal body, the heat conductivity of the carbon/carbon insulating cylinder material is reduced, the thermal field insulating effect is improved, and the energy consumption is saved; and 3, graphite paper is stuck to the inner surface and the outer surface of the insulating cylinder so as to reflect heat effectively and improve the insulation performance.

A stripping liquid of the present invention is used for separating the paper from a plaster/paper laminate such as waste plasterboard, and comprises an aqueous solution of an alkali metal salt or an ammonium salt of carboxylic acid. The stripping liquid is fed onto the surface (paper surface) of the plaster/paper laminate so as to infiltrate into the bonding surface between the plaster and the paper, so that the carboxylate is made present on the bonding surface. Upon stripping off the paper in the presence of the carboxylate, it is allowed to entirely separate the paper from the plaster. Upon mixing the stripping liquid and a nonionic surfactant or a water-soluble organic solvent together, further, the stripping liquid can be quickly and reliably infiltrated into the bonding surface between the plaster and the paper.

The invention discloses a wood-plastic composite with effects of phase-change energy storage and thermal insulation. The material is prepared from resin coated wood flour supported with a phase-change energy storage material, matrix plastic and additives, wherein the resin coated wood flour supported with the phase-change energy storage material comprises composite wood flour, a polyethylene glycol composite phase-change energy storage material supported on the composite wood flour and polyethylene glycol-isocyanate copolymer resin covering the composite wood flour and the polyethylene glycol composite phase-change energy storage material. The wood-plastic composite with the effects of phase-change energy storage has good energy storage and thermal insulation performance, avoids leakage of the phase-change material and is good in mechanical strength. On the other hand, the invention provides a preparation method of the wood-plastic composite with the effects of phase-change energy storage and thermal insulation. The wood-plastic composite is prepared from the wood flour supported with the phase-change energy storage material and PVC (polyvinyl chloride) plastic powder and the additive through mixing, kneading, extruding, open-milling, pressing, cutting and trimming.

A force-measuring device (1) for a gravimetric measuring instrument has a stationary part (11) and a load-receiving part (12). Parallel guide members (14, 15) connect the receiving parts. The device also has at least one balance beam (19) connected to the load-receiving part through a coupling member (17) acting on a first lever arm (18) thereof, and which, at a second lever arm (20) thereof, is connected to a measurement transducer (22) which is arranged on the stationary part. Further levers (29, 30) can be arranged, respectively, between the first lever arm and the load-receiving part, and between the second lever arm and the measurement transducer. At least one sliding weight (23, 23A, 23B) is arranged on the at least one balance beam, wherein the position of each of the sliding weights present can be varied in a controlled way by means of at least one drive mechanism.

The invention discloses a processing technique of antique relief sculpture wood doors and furniture and equipment thereof. In the invention, planking stuff with wood grain is fed into drawing equipment, the wood grains in the planking stuff project above the surface of the planking stuff under the action of a wire brush body, thus forming solid rugged surfaces; the planking stuff processed is fed into a smoke room and natural coloration is carried out on the planking stuff with smoking materials in the smoke room. The mechanical drawing equipment adopted by the invention improves the productivity efficiency of the planking stuff and reduces the labor intensity. In a processing method of the invention, the wood grains of the planking stuff have strong tree-dimensional perception; the surface of the planking stuff is smooth and clean. In the step of natural coloration of the planking stuff, natural smoking materials are adopted and coloration is uniform, the color is simple and unsophisticated, natural and colourfast. Besides, the working process has no pollution and is a natural and environmentally friendly coloration method. The drawing equipment in the invention adopts the wire brush body and is provided with suited density and elasticity, and the surface of the planking stuff takes on uniform, smooth and clean, natural and solid wood grains. A shot-proof device has simple structure and good security.