204 results about "Bead shape" patented technology

The invention relates to the fields of analysis and test, in particular to a multi-channel microfluidic chip capable of detecting various subtype swine influenza viruses (SIV) simultaneously. One of the aims of advancing the related diagnosis and treatment technology is to diagnose the SIV quickly and cheaply. The invention provides a diagnosis device, which can fulfill the aims. The key point of the scheme is that: the device, namely the microfluidic chip, comprises pipelines with a parallel structure, wherein the parallel structure comprises three branched pipelines arranged in parallel; three beads-shaped working electrodes are arranged in the three branched pipelines respectively; each beads-shaped working electrode consists of a conductive electrode and a gold colloid sensitive film; the gold colloid sensitive film is attached to the conductive electrode and embeds different subtypes of SIV specific antibodies; the gold colloid sensitive films on the surface layers of the three beads-shaped working electrodes embed three different subtypes of SIV specific antibody substances respectively; and the three different subtypes of SIV specific antibody substances are the subtype H1N1, the subtype H3N2 and the subtype H1N2 SIV specific antibody substances respectively.

An apparatus 1 of the present invention includes a laser emitting unit 2, a monitor unit 3, a storage unit 4, an image extraction unit 5, a bead recognition unit 6, and a bead shape determination unit 7. The bead shape determination unit 7 is configured to calculate the position of the end of a bead region based on the bead region recognized by the bead recognition unit 6, and to determine whether the shape of the end of the bead region is convex or concave in the extending direction of the bead region.

An apparatus for monitoring a laser welding bead irradiates a laser to a surface of a welding bead when welding with a laser welding machine, collects a signal reflected from the surface of the welding bead as an image signal, and then extracts at least one feature variable of a bead shape using the collected image signal. Then, the apparatus for monitoring the laser welding bead determines welding defects using the at least one feature variable, and controls an operation of the laser welding machine according to whether or not the welding defects are generated.

To precisely measure bead cutting shapes of electric resistance welded pipes without being affected by difference in luminance level between cut and uncut portions in optical cutting images, an image is obtained by overlaying an optical cutting image with the optical cutting image subjected to thinning processing. A profile of the welded pipe is approximated with a quadratic function and a region containing the bead apex coordinates is identified as the bead. Shape data of the pipe surface at the portion corresponding to the bead portion is obtained from the preset left and right boundaries of the bead portion and the apex position of the separately-calculated bead portion, and bead width, height, slope angle, and unevenness at the left and right boundaries between the bead portion and base pipe portion, are each calculated, based on the left and right bead shape approximation functions and base pipe shape approximation function.

The invention discloses a bead-like porous PLA (Poly Lactic Acid) nano fiber which is characterized in that pearls in the bead-like porous PLA nano fiber accounts for 8.0-22% of the area of the bead-like porous PLA nano fiber and the geometrical dimensions of stringed beads are as follows: the pearls have the mean area of 10-80mu m <2> and the length-width ratio of 2-4; the average diameter of fibers for connecting the beads is 100-800nm; the surface pore coverage rate of the beads is 3-30%. Due to the bead-shaped porous structure and the nano porous fibers for connecting the beads, the bead-like porous PLA nano fiber has high specific surface area, and high surface energy is provided for absorbing micro particles; meanwhile, the bead-like porous PLA nano fiber is beneficial to gas circulation, the air filtration resistance is reduced, especially the air filtratione efficiency for micro particles with the mass median diameter of 75nm is 99.9-99.999%, and the average filtration resistance is 120-360 Pa. The invention also provides a preparation method of the bead-like porous PLA nano fiber and application of the bead-like porous PLA nano fiber serving as an air filtration film.

In order to make the depth of penetration in the weld bead portion uniform and obtain a bead shape having a flat bottom without spiking and meltdown during continuous hot rolling by bonding a plurality of hot-rolled steel materials using a laser beam, the following methods are employed: (A) a method of butt welding wherein center gas is blown against the welding portion symmetrically to the optical axis of the laser beam while side gas is being blown thereagainst from the side, the method comprising conducting welding while the center of laser-induced plasma is shifted in the welding direction from the center of the laser beam by a distance 0.2 to 0.5 times as much as a reference plasma diameter determined from the laser output and the beam diameter, and the type and flow rate of the center gas; or (B) a method comprising scanning the butt line with the laser beam during the laser welding at a speed of 2 to 10 m/min, and simultaneously oscillating the laser beam in the direction vertical to the butt line at a frequency of 40 to 80 Hz at an amplitude of 0.4 to 1.0 mm. Alternatively, (C) in order to prevent formation of blow holes in the weld bead, to make the depth of penetration in the weld bead portion uniform, and to obtain a bead shape having a flat bottom without spiking and excessive penetration, laser welding is conducted while a filler wire of an iron series base material, containing from 0.05 to 3% of one or at least two elements selected from aluminum, silicon, titanium and manganese, is being supplied to the welding portion. Moreover, (D) in order to stably supply a filler wire to the butt portion with high supply accuracy, the filler wire W is passed through a wire supply nozzle having a curved portion, and the filler wire is supplied toward the welding point along the welding line.

A composition is provided containing powdered cellulose and at least one water insoluble, immobilized water treatment additive. Preferably, a filter media composition is provided containing powdered cellulose and at least one water insoluble, immobilized enzyme such as lipase for filtration of swimming pool and spa water. The lipase may be recombinantly produced, and lipases having 1,3 positional or non-positional specificity are used. The immobilized lipase may be in the form of bead-shaped particles, and immobilization can be on a macroporous acrylic resin. Moisture may be added to the composition to provide a pre-moistened composition that is dustless and provides for improved dispersement and even filter grid coating. In a filtering system, the filter media absorbs oils contained in pool or spa water, and the lipase hydrolyzes the oils.

In the double-wire feeding arc welding method of the present invention, the first (leading) welding wire (11) and the second (backward) welding wire (12) that are insulated from each other are fed from the welding nozzle (6) at the front end of the welding torch, and the molten metal Welding the low-viscosity iron and steel materials, the welding current (Iw) is energized in the above-mentioned leading welding wire, and the arc (3) is generated to form a molten pool (21). The above-mentioned molten pool (21) under the pressure of the electric arc (3) is excavated to the raised position. Therefore, when welding iron and steel materials with low molten metal viscosity, a good bead shape without unevenness, undercut, and underfill can be obtained.

A reconstructive procedure for addressing instability of the scapholunate articulation between a scaphoid and a lunate of the hand. A graft is obtained. At least a portion of the graft is positioned intramedullary to the scaphoid. At least another portion of the graft is positioning intramedullary to the lunate. The graft crosses directly through the scapholunate joint. A plurality of instruments and implements, including an E-shaped drill guide, a cannulated lunate screw, and suture anchors in the form of button-shaped or bead-shaped anchors, are provided to facilitate the surgeon's performance of the scapholunate ligament reconstruction. A kit is provided, including a plurality of instruments and implements for performing the reconstructive procedure.

The invention discloses an industrial preparation method for calcium carbonate nanometer beads, which is an industrial preparation method for nanometer calcium carbonate with a bead-shaped structure, and comprises the following steps that: (1) natural limestone is crushed and calcined, then is added with hot water for digestion, and passes through a sieve for refining to be prepared into a refined calcium hydroxide material liquid; (2) the calcium hydroxide slurry is sent into a reactor system, proper kiln gas is aerated for carbonization reaction, the concentration of carbon dioxide in the kiln gas is between 10 and 50 percent, and a crystal control agent composition A and a crystal control agent composition B are added before the carbonization or at an initial carbonization stage; and (3) an obtained product is filtered, dried and crushed to obtain the bead-shaped nanometer calcium carbonate. The diameter of the bead-shaped nanometer calcium carbonate is between 20 and 50nm, the slenderness ratio is between 10 and 30, and the BET specific surface area is larger than 30m/g. The bead-shaped nanometer calcium carbonate has good dispersivity, improves the mechanical property of materials, and improves the barrier property of the materials to various gases and liquids, so the bead-shaped nanometer calcium carbonate can be widely applied to industries such as rubber, plastic, coating, printing ink, paper making, sealing gum and the like.

An arc start control method for AC arc welding is provided. In accordance with the method, upon arc start, a welding wire (1) is supplied at an initial feeding speed (Fi), and DC arc welding with electrode-positive polarity is performed during an initial period (Tdc) of hundreds of milliseconds by applying a DC welding current (Idc) with electrode-positive polarity (EP). Then, the welding is switched to AC arc welding based on an AC welding current, and the wire feeding speed (Wf) is varied from the initial feeding speed (Fi) to a steady-state feeding speed (Fc) with a slope (Sf). The initial feeding speed (Fi) is set so that the DC welding current (Idc) is substantially equal to the average (Iav) of the AC welding current. Also, the initial period (Tdc) is set so that the bead shape by the DC arc welding is substantially the same as the bead shape by the AC arc welding. Further, the slope (Sf) is determined so as to be substantially proportional to the rate of change in the wire welding speed observed when the DC welding current (Idc) is switched to the AC welding current.

A container lid for use with a container with a neck. The lid includes a top and bottom, a skirt extending downward from the circumference of the lid, and a circumferential flange extending radially outward from the lid. The skirt preferably includes at least one integral bead shaped to engage the neck or rim of the container. The lid preferably includes a convex center section including at least one vent. The at least one vent is preferably integral with the lid, and is opened by the steam pressure buildup inside the container when the contents are heated. When the cover is locked on the container, the skirt provides a seal against the outside of the container neck.

The invention discloses prepared tea containing complementation combination of oolong and green tea or white tea, and belongs to the tea field. The invention is a kind of dominant complementation with one tea modifying another tea. The invention reinforces the synergy of the two kinds of tea. The invention is characterized in: preparing the tea to a combination with bead shape, clamping green or white tea in oolong (Tieguanyin is the best) leaves to prepare to bead shape, or packaging separately into lovers tea for keeping the advantages of the tow kinds of tea and overcoming the light and bitter flavor in common green or white tea, and foreign flavor in oolong. The invention can still have perfume after being soaked for several times, has the special characters of green tea and oolong, can be drunk in all seasons, and increases new product to the development of fine tea.

The invention provides a preparation method and device for multilayered embedded particles. The preparation method comprises the following steps of: dispersing active components into a protective colloidal solution to form an active component mixed suspension solution; processing the mixed suspension solution into liquid drops with the grain diameter in a range of 100-1000 microns; enabling second-layer embedding materials to be attached to the surfaces of the liquid drops and curing to obtain bead-shaped grains; and further drying the bead-shaped grains to obtain the multilayered embedded particles. The preparation method provided by the invention is simple in device and easy to operate. The multilayered embedded particles provided by the invention have high stability, narrow grain diameter distribution, good flowability and high mechanical strength, and can be widely applied to fields of tablets, hard capsules, diet supplementing foods, health-care foods, medicines and the like.

A beaded Teng tea is prepared from the simple leaf of Teng tea tree through spreading, heating, kneading, primary drying, shaping, drying and flavouring.

The invention relates to a hollow desktop board and a hollow blow molding process thereof, which is designed for the technical problem of poor structure of similar products. The desktop board is composed of two groups of desktop board monomers connected by hinges to form a folding table board. The desktop board is composed of a group of desktop board monomers. It is connected with the back side by reinforcing ribs, and is blow-molded at one time; the main point is that the reinforcing ribs are in the shape of a vertical surface, and the vertical-shaped reinforcing ribs are located inside the desktop board, and both the front and the negative sides are flat; the reinforcing ribs are multi-dimensional The ribs are arranged adjacent or intersecting; the distance between adjacent and intersecting ribs is less than or equal to ten times the distance between the front and back. It has high strength, large bearing weight, simple production process, and feasible hollow blow molding process; it is suitable for the production and use of hollow blow molding desktop boards and other similar hollow board products.

The invention discloses a flue gas condensation-type heat transfer pipe with a bionic structure. The surface of the conventional flue gas condensation-type heat transfer pipe is prepared into a bionic structure surface which is characterized in that hydrophilic protrusions are distributed on an ultra hydrophobic base. When flue gas passes through the heat transfer pipe, water vapor in the flue gas is subjected to the condensation process comprising three links, namely absorption, polymerization growing and falling off, on the bionic structure surface. The flue gas condensation-type heat transfer pipe with the bionic structure can deeply intensify the condensation link of the water vapor in the flue gas, and bead-shaped condensate can be stably formed on the surface of the heat transfer pipe. According to the invention, waste heat and water resources in the industrial flue gas can be recycled efficiently, the energy resource utilization ratio is improved, and low-temperature corrosion can be prevented to a certain extent. The flue gas condensation-type heat transfer pipe with the bionic structure provided by the invention is quite suitable for the low-temperature-difference heat transfer in the industrial field.

A large number of nozzle vanes 16 are arranged in an annular channel 10 formed between opposed surfaces of turbine housing 1 and turbine shroud 9. A recess 20 is constructed on the formation surface of the annular channel 10 of the turbine housing 1, and in this recess, a clearance control plate 21 is disposed so that the clearance C between the plate and nozzle vanes 16 becomes constant. Two gaskets 25 whose outer rims are formed in a bead shape are laid in a gap S on the rear side of clearance control plate 21, in such a manner that outer rims of the gaskets separate from each other. In this configuration, outer rims widen when gas pressure is applied, and gas can be sealed stably without leakage.

The invention provides a flux for electroslag overlay welding. The flux is advantageous in that, in electroslag overlay welding for which band steel formed by a Ni-based alloy is used, even under the condition of small heat input amount in welding, stability of welding is excellent, and good welding bead shape and welding bead appearance can be obtained. The flux (1) is used for the electroslag overlay welding for which the band steel formed by the Ni-based alloy is used. The flux (1) is a sintered flux obtained by mixing and sintering, in total mass percent of the flux, 3-10 mass% of a molten flux as a part of raw materials for the sintered flux, wherein the molten flux comprises CaF2: 5-20 mass%, Al2O3: 10-20 mass%, SiO2: 40-60 mass%, and CaO: 15-30 mass%. In addition, whole composition of the flux is optimized.

A system and method is provided where a work piece is welded at high speeds with minimal porosity and spatter. In embodiments, the work piece is welded with an arc welding process to create a weld puddle and the weld puddle is irradiated by a energy beam downstream of the arc welding operation, such that high welding speeds are attained. The high energy heat source is positioned downstream of the welding operation to input energy into the weld puddle to change its shape or characteristics to optimize bead shape and/or bead quality.

The present invention relates to a hollow pearl nano cerium oxide and its preparation method. The invented nano cerium oxide is a spherical granule whose diameter is 80-200 nm and centre has a through hole whose diameter is 10-60 nm. Said invention utilizes organic solvent to make the cerium salt be dissolved, and further utilizes solvent heat to make the hollow pearl nano cerium oxide be formed on the surface of carbon nano tube, then the template is removed, so that the correspondent hollow pearl nano cerium oxide can be obtained.