89results about How to "Avoid excessive concentration" patented technology

This silicon carbide semiconductor device includes: a substrate with a principal surface; a silicon carbide layer which is arranged on a side of the principal surface of the substrate and which includes a first impurity region of a first conductivity type; a trench which is arranged in the silicon carbide layer and which has a bottom located in the first impurity region; a trench bottom impurity layer which is arranged in the trench to contact with at least a portion of the bottom of the trench and which is a silicon carbide epitaxial layer of a second conductivity type; a gate insulating film which covers a side surface of the trench and the trench bottom impurity layer; and a gate electrode which is arranged over at least a portion of the gate insulating film that is located inside the trench.

The invention relates to the field of hydrogenation for preparing cyclohexane-1,2-dibasic diformate, and discloses a preparing method for cyclohexane-1,2-dioctyl phthalate dibasic ester. The method comprises the steps that firstly, hydrogenation raw materials containing phthalic acid dibasic ester and H2 are subjected to first contact in a main hydrogenation reactor in the presence of a first catalyst, and first gas-liquid mixing fluid is obtained; secondly, the first gas-liquid mixing fluid is subjected to gas-liquid separation; thirdly, hydrogen is injected into main hydrogenation reaction liquid through holes with the average hole diameter being the nanometer size, the main hydrogenation reaction liquid is separated out in the second step, and second gas-liquid mixed fluid is obtained; fourthly, the second gas-liquid mixed fluid is subjected to second contact in a rear hydrogenation reactor in the presence of a second catalyst, and third gas-liquid mixed fluid is obtained; and fifthly, the third gas-liquid mixed fluid is subjected to gas-liquid separation. The method has the beneficial effects that the raw material conversion rate, the product selectivity and the cis-structure product content are high.

The invention belongs to the field of traffic management and control and particularly relates to a guidance system for parking in an urban region. The system is mainly characterized in that region-based parking guidance is carried out according to colors and landmarks; colors of partial main roads and areas or colors of landmark buildings and the total number of parking spaces in the region are mainly displayed on guidance screens, it is unnecessary that all information like the names of parked cars is displayed on the guidance screens, and therefore the situation that drivers can not master all parking information in the limited driving time because a large amount of information is displayed on traditional guidance screens is avoided; the guidance screens are simple in layout, easy to understand and high in recognition performance, wherein the first-level guidance screen is mainly used for enabling the drivers to roughly know about the positions of target communities through the colors and the landmarks, the second-level guidance screen is mainly used for enabling the drivers to correctly drive to target parking lots through different colors and distances, and the three-level guidance screen is used for enabling the drivers to see entrances of the target parking lots in the distance through the colors corresponding to the colors of the second-level guidance screen.

The invention discloses an LED (light-emitting diode) chip with a novel structure and a production method of the LED chip, and belongs to the field of a semiconductor device. The LED chip structure comprises an N-side electrode, a substrate, an active layer, a gallium phosphide layer, an indium-gallium-phosphorus layer, a P-side soldering wire electrode, an expanded electrode and a current barrier groove. The production method comprises the steps: growing the indium-gallium-phosphorus layer with the thickness of 1000 angstroms on a P side of a chip, etching and coarsing the gallium phosphide layer, evaporating the P-side soldering wire electrode and the expanded electrode by utilizing a vacuum film coating technology, etching the current barrier groove by virtue of plasma, and facilitating the ohm contact between the expanded electrode and the gallium phosphide layer in virtue of alloy. By adopting the produced LED chip, the current can be expanded to the entire chip surface through the expanded electrode, so that the effective application of the current is improved; meanwhile, by adopting the surface coarsing, the light emitting rate of the chip can be effectively improved. The LED chip has the advantages of simplicity in structure, simple and feasible production method and easiness in manufacturing.

The invention discloses a support structure and a ship. The support structure comprises a framework, a lifting mechanism, a hanger rod structure and a limiting structure. The framework is fixed onto the ship, the lifting mechanism is vertically arranged on the framework, the upper end of the hanger rod structure is hung on an expansion end of the lifting mechanism, and horizontal movement of the hanger rod structure can be blocked by the limiting structure.

The invention discloses a motorcycle engine connecting rod and its manufacturing process. The engine connecting rod has a rod body, a large head and a small head are respectively arranged at two ends of the rod body, and a crank pin mounting hole is arranged on the large head. A piston pin installation hole is provided on the small head, and a copper layer is plated on the surface of the shaft, the large head and the small head, and the thickness L of the copper layer is 0.05mm-0.09mm. The manufacturing process of the engine connecting rod is: 1) blanking; 2) forging blank; 3) normalizing treatment; 4) shot blasting treatment; 5) carburizing and quenching treatment; 6) copper plating treatment; 7) machining out Crank pin mounting holes and piston pin mounting holes. The invention delays the surface oxidation process of the connecting rod by increasing the copper plating treatment, reduces the chance of cracks, and improves the service life of the invention; it has the characteristics of easy realization, low cost, long life and light weight.

The invention provides an LED epitaxial wafer with a current blocking layer. The LED epitaxial wafer comprises a substrate. A GaN epitaxial layer is epitaxially grown on the substrate. Dry method etching is used to etch a first electrode placing area which is in the shape of a ladder. A current barrier layer is formed on the non-etched area of the GaN epitaxial layer. Concentric ITO conductive rings are uniformly spaced in the current barrier layer. The top surfaces of the conductive rings are level with the top surface of the current barrier layer. An ITO current expansion layer is deposited on the current barrier layer. According to the invention, the concentric conductive rings are used to transfer current, and the excessive concentration of the current in the middle of an electrode is prevented.

The invention discloses an SCR inlet NOX concentration prediction system and method based on an index prediction model. The SCR inlet NOX concentration prediction system comprises a weight transmitter, a rotating speed transmitter, a primary air quantity transmitter, a secondary air quantity transmitter, an oxygen quantity transmitter, a primary air pressure transmitter, a controller and a decentralized control system. The controller is connected with the weight transmitter and the rotating speed transmitter, the controller, the primary air quantity transmitter, the secondary air quantity transmitter, the oxygen quantity transmitter and the primary air pressure transmitter are connected with the decentralized control system, and the SCR inlet NOX concentration prediction system and methodcan accurately predict the NOX concentration of an SCR inlet.

The invention relates to a flexible touch panel. The flexible touch panel comprises a substrate, an OLED packaging layer, a touch electrode metal layer and a touch packaging layer. According to the invention, self-capacitance touch electrodes are manufactured on the flexible touch panel. A high-speed switch controller is additionally arranged in the second area. Touch sensing signal leads are processed by the high-speed switch controller, and under the condition that the number of the touch units is not changed, the number of the touch sensing signal leads led out to touch bonding terminals isreduced, so that the position of a display bonding area is reserved, and the touch sensing signal leads can be conveniently realized on an oncell. Therefore, the display bonding area is separated from the touch bonding area, excessive concentration of the touch sensing signal leads and the display signal leads is avoided, and signal interference is avoided.

The invention discloses a dual-polarized full-wave oscillator based on radiating surface defect coupling. The dual-polarized full-wave oscillator comprises a metal radiating surface arranged on a dielectric plate, a supporting conductor feeding the metal radiating surface and a reflective grounding plate, wherein one end of the supporting conductor is connected with the reflective grounding plate,and the other end of the supporting conductor is connected with the metal radiating surface; the metal radiating surface is horizontally arranged above the reflective grounding plate; the metal radiating surface is formed by four equivalent conductor rings arranged symmetrically in a cross shape; and the central position of the outer edge of each conductor ring breaks radiating arms at the two sides of a central gap, wherein a resistor structure equivalent to a zero impedance value is connected to the braking position, and the resistor structure equivalent to the zero impedance value is connected with the radiating arms at the two sides in a defect coupling mode. By loading a zero-resistance defect coupling mechanism to the middle of each conductor ring of the metal radiating surface of the oscillator, current paths are more diversified, excessive centralization of currents is avoided, resonance is effectively avoided, and therefore a directional diagram is perfected.

The invention discloses efficient yield-increasing biological bacterial fertilizer. The formula of the efficient yield-increasing biological bacterial fertilizer consists of the following raw materials in parts by weight: 30 to 40 parts of organic matter, 30 to 40 parts of cultivating soil, 10 to 12 parts of pure water mixture, 4 to 6 parts of actinomycetes, 3 to 5 parts of nitrogen-fixing bacteria, 6 to 8 parts of silicate bacteria, 2 to 3 parts of bacillus subtilis, 3 to 5 parts of paenibacillus polymyxa, 5 to 7 parts of trichoderma viride, 5 to 7 parts of saccharomycetes and 1 to 3 parts of photosynthetic bacteria. Fermentation is conducted on the basis of the traditional organic fertilizer to form the organic matters, neutralized buffering is conducted through high-quality black soil, the organic matters are dispersed into the black soil, chemical fertilizer is added into the pure water mixture, the action effect of the fertilizer is improved by the high-fertility effect of the low-concentration chemical fertilizer, the fertility of the bacterial fertilizer can be guaranteed, the passivated nutritional components in the soil can be released through the decomposition action of the microbial bacteria and then are completely utilized by crops, and the yield increasing effect is achieved; furthermore, nitrogen fixation is conducted by utilizing the absorption and dissimilation effect of the microorganisms well, so the soil fertility is improved and remained.

The invention provides a light source device and a manufacturing method thereof. The light source device comprises a cup base, a luminescent chip and a package body, wherein, the cup base is providedwith an accommodating space which is encircled by the cup wall; the luminescent chip is arranged in the accommodating space encircled by the cup wall; and the package body is filled in the accommodating space and encircles the luminescent chip. The outside surface of the package body mainly comprises two parts like a central concave side and an annular convex side, wherein, the annular convex sideencircles outside the central concave side to form an annularity; the central concave side forms a continuous concave ball cambered surface with no singular points; and the joint position of the central concave side and the annular convex side extrudes outside and forms an annular convex ridge.

The invention discloses a feedstuff feeding device for poultry raising, which comprises a bearing bottom plate, a supporting frame is vertically fixed on the bearing bottom plate, a top plate is horizontally and fixedly arranged at the upper end of the supporting frame, a fixing frame is fixedly arranged on the inner side wall of the supporting frame, a rotating shaft is coaxially fixed on the output shaft of a servo motor, and the upper end of the rotating shaft is horizontally and fixedly provided with a dispersion cone disc arranged below a rotating plate; according to the invention, the labor intensity is low, the workload is small, the alternate actions of closing up and separating of the rotating plate can be achieved through the forward and reversal rotation of a forward-and-reversal rotation motor, the intermittent feeding process can be acheived, the excessive concentration falling of the feedstuff can be avoided, the rotation of the dispersion cone disk achieves the feeding of the feedstuff, and the feedstuff is evenly distributed by a segregation groove and evenly fed by a guide groove, and the feeding of the feedstuff is more uniform; meanwhile, the rotation of scattering blades achieves the scattering of the feedstuff, the coagulation of the feed into blocks is effectively avoided, and the falling and feeding of the feedstuff are promoted.

The invention discloses a resin coupled denitrification nitrogen removal method, and belongs to the technical field of sewage treatment. According to the invention, a resin is regenerated by using a regeneration liquid containing sodium acetate, nitrogen-containing wastewater is subjected to adsorption treatment by using the regenerated resin, and the nitrogen-containing wastewater subjected to adsorption treatment is introduced into a denitrification reactor and is subjected to denitrification, wherein the regeneration liquid can remove nitrate nitrogen through denitrification, and can also be used as a microbial carbon source, so that the stability and the treatment effect of a sewage biochemical system are improved.

The invention provides a light supply apparatus and a manufacturing method thereof. The light supply apparatus comprises a base, a light-emitting chip and a sealed mirror body, wherein the light-emitting chip is arranged on the base; the sealed mirror body is covered on the base and surrounds the light-emitting chip; the external surface of the sealed mirror body mainly comprises an internal ring convex surface and an external ring convex surface; the external ring convex surface surrounds the outside of the internal ring convex surface to form a ring form; the internal ring convex surface is surrounded into a conical space with narrow bottom and wide opening; the light-emitting chip is positioned in the projection range of the internal ring convex surface on the base; and partial light rays generated by the light-emitting chip are directly reflected to the external ring convex surface by the internal ring convex surface, and are directly emitted or refracted at the position of the external ring convex surface to leave the sealed mirror body.

The invention discloses a band steel traction connection structure and a band penetration method for a continuous band steel unit, and particularly relates to the field of band steel production. The band steel traction connection structure which is firm in connection, is capable of reducing the band breaking frequency and is provided by the invention comprises a band steel end part, a band steel traction head, a pull ring and a traction band, wherein one end of the band steel traction head and the band steel end part are of an integrated structure, and the other end of the band steel traction head is riveted on the band steel end part, so that an annular structure is firmer. The band penetration method for the continuous band steel unit, which is provided by the invention, comprises the following steps: a, lowering a loop trolley to a zero position; b, winding the traction band around each roller group; c, fixedly connecting the band steel traction connection structure with one end of band steel; d, tensioning a loop; e, filling the loop with the traction band; f, performing band penetration operation. The tension of the traction band is accurately controlled through automatic tension control equipment, so that breaking of the traction band due to the fact that a certain part is over-tensioned is avoided.

The invention provides a method for preparing lutein crystals from marigold ointment by catalytic saponification. A mixture of one or more of KOH, NaOH, sodium methoxide and sodium ethylate and alkaline ionic resin is preferably used as a saponification catalyst, and small amounts of deionized water and low-polarity solvent are utilized to clean the lutein crystal crude product, wherein the low-polarity solvent is preferably one or more of petroleum ether, n-hexane and ethyl acetate. Compared with the traditional method, the method provided by the invention greatly reduces the organic cleaning solvent, simplifies the after-treatment technique, and reduces the environmental pollution. The preparation method of the lutein crystals has the advantage of simple and stable technique, and is suitable for industrial large-scale production; and the purity and yield of the prepared lutein crystals are respectively up to 82% and 90% above.

The invention relates to an aluminum electrolytic technology, more specifically relates to a preheating and roasting method for an aluminum electrolytic tank, especially provides a method for roasting the aluminum electrolytic tank with a special-shaped cathode structure. The invention solves the technical problem that the aluminum electrolytic tank with special-shaped cathode structure can be roasted by reducing the amount of a carbon material. The roasting method comprises the following steps: A, filling a basic material in a special-shaped cathode groove, wherein the basic material can not contact with anode; B, laying the carbon material on a convex plate of the special-shaped cathode, wherein the carbon material is contact with anode; C, electrifying and roasting; wherein the basic material is an electrolyte block or/and cryolite. One of the electrolyte block and cryolite can be selected, or a mixture of the electrolyte block and cryolite can be used; any proportion can be employed for mixing. The roasting method of the invention can reduce the carbon material amount, the workload for fishing, and the phenomena of overburn and chipping. The method of the invention provides an effective method for roasting the aluminum electrolytic tank.

The invention relates to a cross-block chain interaction method based on a relay chain, and belongs to the field of inter-block chain communication, the cross-block chain interaction method comprises matching transaction by using a transaction matching algorithm, relay chain coordination transaction and sub-mark smart contract verification transaction, and the method specifically comprises the following steps: S1, a user joins in the relay chain; s2, a relay chain user submits a transaction demand, the transaction demand is packaged and stored in a block on the relay chain, the user carries out matching through a transaction matching algorithm, when cross-chain transactions are successfully matched, a mark smart contract for coordinating the cross-chain transaction is generated on the relay chain, the contract generates a unique ID for identifying the cross-chain transaction, and when the cross-chain transactions are successfully matched, the mark smart contract is used for coordinating the cross-chain transaction; the matching information is sent to the user successfully matched this time; s3, after matching succeeds, entering a preparation stage, and making preparation for the following actual cross-chain behavior by the relay chain and the block chain which specifically participates in cross-chain; s4, after all preparatory work is completed, entering a coordination stage; the coordination stage is a specific execution process of the cross-chain transaction.

The invention belongs to the field of aluminum alloy materials, and relates to a process control method for laser 3D printing of aluminum alloys modified and enhanced by low-element burning loss, including powder spreading and laser scanning; Defocus scanning is carried out in combination of the three; wherein, the partition differential scanning is to uniformly partition the two-dimensional scanning area to obtain a number of scanning blocks, and the block interval scanning is adopted during the scanning process; the intermittent Scanning means that during the scanning process, the laser beam stops scanning every time it travels a scanning vector distance, cools down for a period of time, and then continues scanning; the defocused scanning is to change the focal plane of the laser beam so that the focal plane is located below the formed substrate. It achieves effective control of the temperature of the molten pool in the laser 3D printing process through process regulation methods, and at the same time solves the problem of burning elements in laser additive manufacturing.