350results about How to "Change density" patented technology

An arrangement and a method to control and regulate the bottom hole pressure in a well during subsea drilling at deep waters: The method involves adjustment of a liquid/gas interface level in a drilling riser up or down. The arrangement comprises a high pressure drilling riser and a surface BOP at the upper end of the drilling riser. The surface BOP havs a gas bleeding outlet. The riser also comprises a BOP, with a by-pass line. The drilling riser has an outlet at a depth below the water surface, and the outlet is connected to a pumping system with a flow return conduit running back to a drilling vessel/platform.

The invention provides a sidelight type backlight source module which comprises a light source bracket with a back plate and a rubber frame, LED (Light-Emitting Diode) lamp strips with a plurality of LED light sources, a printed circuit board, a reflecting film, a light guide plate, a brightening film and a scattering film. The light guide plate comprises a light incident bottom surface and a light emergent top surface which is opposite to the light incident bottom surface; scattering lattice points are arranged on the light incident bottom surface of the light guide plate; a gradual change type arrangement way in which the arrangement density degree is determined according to the distances from the scattering lattice points to the LED light sources is adopted for the scattering lattice points; and the arrangement density gradually increases along with the increase of the distances from the scattering lattice points to the LED light sources by regarding the LED lamp strips as boundaries. Compared with the prior art, the sidelight type backlight source module disclosed by the invention provides a backlight source by placing the LED strips at the two sides or single side and changes emergent light brightness at each special position of the light guide plate by setting the non-uniformly distributed scattering lattice points, so that light reinforcement is realized at corresponding position of the light guide plate, which is far away from the LED light sources, and thus ideal light brightness and light emergent uniformity are obtained through the light guide plate.

The invention provides a catalyst system and a method of making polyethylene using the catalyst system, the method comprising combining ethylene; an activator; and a metallocene catalyst compound; wherein in one embodiment the metallocene catalyst compound is selected from:

wherein M is a Group 4 atom; X is a leaving group; n is an integer from 0 to 3; and R¹ to R¹² are independently selected from hydrides, halogens, hydroxy, C₁ to C₆ alkoxys, C₁ to C₆ alkenyls, and C₁ to C₁₀ alkyls; characterized in that when the comonomer is 1-hexene, and the mole ratio of 1-hexene to ethylene combined is varied between 0.015 to 0.05, the density of the resultant polyethylene changes by less than 5% and the I₂₁/I₂ varies from 10 to 150.

The act of blowing an unpassivated electrical fuse (for example, fuse 405) using a laser can result in the splattering of the fuse material and result in electrical short circuits. A blast barrier (for example blast barrier 406) formed around an area of the fuse that is blown by the laser helps to contain the splattering of the fuse material. The blast barrier may be formed from the same material as the fuses themselves and, therefore, can be created in the same fabrication step.

The invention aims to disclose high-bioactivity ganoderma spore oil and a preparation method thereof, and belongs to the field of Chinese medicament. The method comprises the following steps: breaking walls of ganoderma spore powder by adopting a high-energy nano impact mill, performing dry granulation, supercritical CO2 extraction, molecular distillation and purification, and thus obtaining the ganoderma spore oil. The operation process of the method is carried out in an anhydrous environment, so that oxidation of the spore oil in the processing process is reduced, and the obtained product is stable in property; the freezing transparent test time of the ganoderma spore oil prepared by the method exceeds 5.5 hours; and the measured unsaturated fatty acid content is between 60 and 80 percent, the total triterpenoid content is 2 to 3 percent, the total ergosterol content is 2 to 5 mg/g, the ganoderic acid A content is more than 1 mg/g, the peroxide value is less than 5mmol/kg, and the acid value is less than 10 mg KOH/g.

The invention discloses a numerical simulation method for the three-dimensional dynamic evolution process of streamer discharge of insulating oil. The method comprises the steps of firstly, establishing an insulating oil discharge model and an electrohydrodynamics model describing the physical process of discharge of the insulating oil; then, determining physical quantity parameters in a governing equation, setting physical disturbance points, determining boundary conditions and carrying out mesh division on a solution domain and a boundary; carrying out numerical solution and postprocessing on the governing equation through finite element software to obtain the spatial-temporal evolution dynamic state of the electric field intensity, the particle concentration distribution characteristics and discharge channel furcation behavior in streamer discharge. According to the method, the electric field intensity and charged particle concentration distribution in discharge of the insulating oil can be directly estimated, the influence of the space charge effect in the discharge channel forming process can be quantitatively evaluated, the discharge furcation behavior caused by stochastic disturbance can be simulated, and therefore important data support and theoretical bases can be provided for research on the harmfulness of discharge of liquid dielectrics.

An image stabilizer manufacturing method provides an image stabilizer which can steady blurry images produced by camera shake or vibration. One of the magnet and a coil supporting member are fixed to a moving frame. In the state in which an optical axis of a correcting lens is matched with an optical axis of a lens system, after first and second Hall elements were properly positioned at the position in which magnetic force received by both of the Hall elements becomes a reference value by moving the first and second Hall elements to first and second directions, the other of the magnet and the coil supporting member are fixed to a supporting frame.

The invention discloses a method for preparing graphene sponge based on traditional sponge serving as a template, relates to the method for preparing the graphene sponge, and mainly solves the problem that the size of the conventional graphene sponge product is limited by equipment. The method comprises the following steps: first, preparing graphene oxide; second, reducing the graphene oxide; third, preparing graphene dispersion liquid; fourth, preparing the graphene sponge by an electrophoresis method; fifth, performing drying treatment to obtain a graphene sponge material based on the traditional sponge serving as the template. By the method, a large-size sample can be prepared; the method can be widely applied to industrial production. The method is used for preparing the graphene sponge based on the traditional sponge serving as the template.

The invention relates to a guide vane (24) for a dual flow aircraft turbine engine, the aerodynamic part (32) of the vane comprising an inner duct (50a) for lubricant cooling extending in a main direction (52a) and being partly bounded by a pressure side wall (70) and a suction side wall (72) of the vane.

According to the invention, the aerodynamic part (32) of the vane is embodied from as a single piece, including also the heat transfer fins (80), arranged in the duct (50a) expanding substantially parallel to the direction (52a), the fins (80) being spaced from each other depending on the direction (52a) as well as a transversal direction (60) of the vane, so that at least some of the fins (80) are arranged substantially staggered.

Disclosed is a honeycomb structure 10 made by joining a plurality of honeycomb segments 1, 2 in each of which a plurality of cells each having a rectangular sectional shape are formed between partition walls 3 which are at right angles to each other. At least a portion of the honeycomb segments 1 constituting the outer periphery 5 of the honeycomb structure 10 has a structure in which compression strength is larger than that of the honeycomb segments 2 constituting the other portions of the honeycomb structure 10.

The invention relates to a rare-earth electrode slurry of rare-earth circuit, based on the metal base board and a relative production, wherein it is characterized in that: said slurry is formed by solid material and organic solvent carrier, while their mass ratio is 70-90:30-10; the solid component comprises: silver, palladium, and yttrium composite power and micro-crystal glass powder, while their mass percentage is 99.4-94:0.6-6; said composite power is formed by silver, palladium, and yttrium powders at the ratio as 0.6-10:99-82:0.4-8; said micro-crystal glass is the one in SiO2-Al2O3-CaO-B2O3-Bi2O3-La2O3 group. And the production comprises: (1), preparing rare-earth micro-crystal glass powder; (2), preparing silver, palladium, and yttrium composite powder; (3), preparing organic solvent carrier; (4), mixing material in three-dimension and rolling with three rollers; (5), preparing the rare-earth slurry; (6), bottling. The invention is environment friendly and better humidity compatibility.

The invention relates to superfine quick-setting self-compacting repair mortar material and a preparation method thereof; the superfine quick-setting self-compacting repair mortar material is characterized by being prepared from, by total weight of the materials, 35.0-55.0% of quick-hardening early strength cement, 35.0-55.0% of fine aggregate, 3.0-10.0% of a mineral admixture, 2.5-5.0% of an excitant, 0.80-2.00% of redispersible latex powder, 0.25-0.50% of a water-reducing agent, 0.25-0.50% of a thickening time control agent, and 0.01-0.05% of a defoaming agent. The preparation method comprises: weighing the materials to a proportion, and mixing well in a mixing machine. The superfine quick-setting self-compacting repair mortar material has good constructability, is up to 330 mm in initial mobility, has initial setting time of </=20 min and final setting time of </=30 min, is up to 33.0 MPa and 50.0 MPa in 6 h compressive strength and 24 h compressive strength, has stably increasing late strength, is up to 4.0 MPa and 6.0 MPa in 1 d and 3 d interfacial flexural-tensile strength of concrete interface, has the advantages of micro-expansion effect and good construction operational simplicity, and is suitable for the quick repair of housing and roads, particularly for the repair of concrete fracture surfaces and damaged rail plates of high-speed railway ballastless tracks.

The invention relates to the technical field of extraction of active ingredients of edible mushrooms, and particularly relates to a method for simultaneously extracting polysaccharide and polyphenol from needle mushrooms. The method comprises the steps: preparing an extraction solution, extracting an alkaline solution by assistance of ultrasonic wave, performing enzymolysis on residue, extracting polyphenol from ethyl acetate and extracting polysaccharide after ultrafiltration and desalination. According to the method, operations such as auxiliary extraction, enzymolysis and membrane filtration are organically combined, and the polysaccharide and the polyphenol are simultaneously extracted, so that the production process is simplified, the safety and reliability are achieved, the yield is high, the physiological and pharmacological activities of the polysaccharide and the polyphenol in a needle mushroom sporocarp are well reserved, and a larger economic value is achieved.

The invention discloses a high-temperature high-power rare earth resistance paste and a preparation method thereof. The high-temperature high-power rare earth resistance paste comprises a functional phase, an inorganic adhesive phase, a burning promoter and an organic carrier, wherein the functional phase is composite powder consisting of micrometer silver powder and bismuth ruthenate powder; the inorganic adhesive phase is lead-free pyroceram powder consisting of SiO2, MgO, B2O3, ZnO, Bi2O3, rare earth oxides and a nucleation agent; and the organic carrier is a mixture consisting of a solvent, resin, a dispersing agent, a deforming agent and a thixotropic agent. The resistance paste has the advantages that firstly, the damages of lead on the environment and human bodies can be avoided; secondly, the resistance paste is high in compatibility, wettability, thermal performance, electrical performance, manufacturability and adaptability; thirdly, the resistance paste is high in binding performance with ceramic and stainless steel substrates; and fourthly, the resistance paste is high in printing performance, burning performance and compatibility. The preparation method comprises preparation of the inorganic adhesive phase, preparation of the functional phase, preparation of the organic carrier and preparation of the resistance paste in sequence, and the resistance paste can be produced and prepared effectively.

Upon conversion of density and/or tone of an image, an impression of a specific color in the image is also corrected. Tone conversion is carried out in a CMY color space on image data having been subjected to logarithmic conversion, and density conversion processing is also carried out thereon in density conversion means. The image data are then subjected to inverse logarithmic conversion. In LCH conversion means, the image data are converted into lightness, saturation and hue, and the saturation and/or the hue are corrected by color impression correction means. By converting the data into RGB data by using RGB conversion means, processed image data are obtained.

The invention discloses a preparation method of a phosphorus-doped cobalt telluride nano material, which comprises the following steps: preparing cobalt hydroxide by using cobalt nitrate and urea as raw materials through a hydrothermal method, calcining to obtain Co3O4 nanosheets, grinding and mixing the Co3O4 nanosheets and tellurium powder, and calcining in an Ar atmosphere to obtain CoTe2 nanosheets; and finally, grinding and mixing the CoTe2 nanosheets and sodium hypophosphite, and calcining in Ar gas to obtain the phosphorus-doped CoTe2 nanoparticle material. According to the invention, phosphorus is doped, so electron cloud density of surrounding CoTe2 is changed, and favorable synergistic effect is generated to improve HER activity; the prepared P-CoTe2 nano-particle is of a porousstructure, is high in specific surface area and high in electrical conductivity, has stable and efficient catalytic hydrogen evolution performance in acidic and alkaline environments, and can be usedas an electrocatalyst for hydrogen evolution reaction by hydrolysis.

The invention discloses an electrochemical industrial titanium anode with oxide seed layer, which is characterized by the following: depositing to cover oxide seed layer on the titanium base of titanium anode; coating subsequent coating layer on the exterior layer of oxide seed layer.