140results about How to "Improve uneven distribution" patented technology

The invention discloses a nitride luminescent device and a production method thereof, which relate to a semiconductor luminescent device and provide a nitride luminescent device with an asymmetric coupled multi-quantum well structure being the active area. The device at least comprises an n-type electron injection layer, a p-type hole injection layer and a multi-quantum well active layer which is sandwiched between the n-type electron injection layer and the p-type hole injection layer, and the active layer is composed of asymmetric coupled quantum well structures. The barrier layer of the quantum well is thinner, thus being easy to realize the tunneling of current carriers; transition energy between ground-state energy level in the quantum wells is gradually changed; the quantum wells with high transition energy are close to the p-type hole injection layer; and the quantum wells with low transition energy are close to the n-type electron injection layer. The active area structure can enhance the tunneling transportation of the holes in the quantum well active area, simultaneously block the tunneling transportation of electrons in the quantum well active area, improve the uneven distribution of current carriers in the active area of the nitride luminescent device, reduce electron leakage and energy band filling effect, and realize high-efficiency luminescence.

The invention relates to a method and the corresponding system to correct the color evenness of the projector scope. It divides uniformly the display screen into n1xn2 correction areas. Therefore there are (n1+1)x(n2+1) correction points. The red, green and blue brightness of each correction point varies by tuning the register values of the (n1+1)x(n2+1) matrix corresponding to the three colors of the tuning circuit. The correction brightness values are stored in the register, which will be added to the video signals brightness values of the relevant correction points. The results are served as the final video signal output. The brightness ratios of the three primary colors are kept equal by collecting the red, green and blue brightness values of each correction point through CCD and then tuning the corresponding correction brightness values. By this means, the color evenness is corrected.

The invention provides a method for preparing isocyanate based on a salifying phosgenation method. A salt forming reaction in the method comprises the following two steps: firstly, performing preliminary salt forming reaction by adopting a conventional reactor; secondly, adding a moderately polar organic solvent with a certain proportion into a reactor provided with an hourglass type liquid slurry disperser to carry out salt forming curing reaction, wherein star-shaped discharge openings are arrayed in a cylinder body of the hourglass type disperser. According to the preparation method, the fact that amino groups in raw materials are converted into amine hydrochlorides with high conversion rate can be ensured through the salt forming curing reaction, and the isocyanate product can be obtained with high yield through a follow-up photochemical reaction.

The invention relates to a flow-dividing annular micro-channel radiator, which is mainly composed of a circular micro-rib plate, a circular flow dividing structure and a cover plate. The special flowdividing structure of the radiator is formed by annular micro-channels on the micro-rib plate and flow dividing channels on the flow dividing structure. The diameter of the circular flow dividing structure is less than that of the circular micro-rib plate, and an annular channel formed by the circular flow dividing structure and the circular micro-rib plate serve as a primary flow dividing channel, thereby effectively solving a problem of uneven primary flow dividing caused by a stagnation effect of a cooling working medium at the tail end of the flow dividing channel. Secondary flow dividingchannels are of a gradually shrinking structure, which can also weaken the influences of fluid stagnation inside the flow dividing channel and increase the uniformity of flow distribution between overflowing channels. The flow-dividing annular micro-channel radiator further improves the problem of nonuniform flow distribution on the basis of reserving advantages of the micro-channel flow dividingstructure, and has high heat exchange capacity and heat exchange limit. The flow-dividing annular micro-channel radiator is compact in structure and good in heat exchange capacity, and has excellent application prospects in the aspect of cooling for high heating equipment such as electronic chips, lasers and rectifiers.

The invention provides a preparation method of a graphene / modified titanium dioxide sol composite material. The preparation method is characterized by comprising the steps of: providing titanium dioxide nano sol and graphene; carrying out a reduction reaction under the action of mercapto carboxylic acid and sodium borohydride with auric chloride acid as a raw material, thiol as a surfactant and tetraoctyl ammonium bromide as a phase transfer agent to obtain modified gold nano sol; respectively dispersing the modified gold nano sol and the titanium dioxide nano sol in organic solvents, and mixing to obtain gold nano sol modified titanium dioxide sol; and mixing the gold nano sol modified titanium dioxide sol with a toluene solution of graphene, uniformly dispersing and filtering to obtain the graphene / modified titanium dioxide sol composite material. The modified titanium dioxide nano sol can be uniformly dispersed on the surface of graphene and does not agglomerate.

The invention discloses a touch substrate, a manufacturing method thereof and a touch display device and belongs to the technical field of touch control. The touch substrate comprises a touch area and a peripheral area which are located on the substrate. The peripheral area comprises at least one signal line and at least one shielding line, and the shielding line is used for shielding interference of the signal line on the capacitance of the touch area. By means of the touch substrate, interference of the signal line on the touch area can be shielded, and the problem that the capacitance of a touch substrate is not uniform in distribution is alleviated.

The invention discloses liquid curable boron-containing polycarbosilane and a preparation method thereof. The preparation method comprises the following steps: in a closed reaction container, subjecting polycarbosilane and a boron-containing monomer to a first reaction to generate liquid boron-containing polycarbosilane, wherein the polycarbosilane is a low-molecular-weight product obtained afterhigh-temperature cracking of polydimethylsilane, is in a liquid state at room temperature, and has a molecular weight of less than 1000 g / mol; and carrying out a second reaction on a uniformly-mixed reaction system containing the liquid boron-containing polycarbosilane, an organosilicon compound containing a C=C bond and a catalyst to obtain the liquid curable boron-containing polycarbosilane. Theliquid curable boron-containing polycarbosilane precursor disclosed by the invention is in a liquid state at room temperature, is simple in preparation process and long in storage time, can be thermocured, and is applicable to the fields of preparation of silicon carbide ceramic-based composite materials, high-temperature-resistant coatings, adhesives and the like through a precursor infiltrationand pyrolysis (PIP) method; and due to the existence of boron, the temperature resistance of a final product is improved.

The invention discloses a radio frequency switch circuit. The radio frequency switch circuit comprises a plurality of radio frequency signal pathways; each of the radio frequency signal pathways includes a series branch and a parallel branch; each of the parallel branches includes N stacked MOS FETs; each of the parallel branches further includes N grid parallel resistors respectively connected with grids of the N MOS FETs, and M biasing resistors having certain ends connected with at least one grid parallel resistor and the other ends connected with a parallel control signal. Therefore, the grid parallel resistors in the parallel branch all are connected with the biasing resistors and then are connected to a control signal port together, so the non-uniform distribution of a large voltage swing on each of the stacked MOS FETs can be very effectively improved, and each of the FETs bears the relatively uniform voltage swing; and thus, the FETs on a top end of a stacked-FET chain are prevented from being first broken down, and the worsening of a switching harmonic due to the large voltage swing on the FETs is prevented, thereby further improving the power handling capacity and the linearity of the radio frequency switch.

The invention discloses a pressure-swing absorber comprising a cylinder fixedly provided with an upper end enclosure and a lower end enclosure. The upper end enclosure is fixedly provided with a gas outlet pipe; the pressure-swing absorber further comprises an end cover and a gas distributor; the end cover is fixedly connected with a lower sealing cover and fixedly provided with a gas inlet pipe;the gas outlet pipe, the upper end enclosure, the cylinder, the lower end enclosure, the end cover and the gas inlet pipe jointly form an internal hollow cavity which is communicated with the outsideonly through the gas outlet pipe and the gas inlet pipe; the gas distributor is provided with a plurality of through holes with outlets facing to different directions of the internal part of the cylinder; and the gas inlet pipe is communicated with the internal cylinder through the through holes. The pressure-swing absorber has the following advantages: (1) the situation of uneven distribution ofraw material gas in the pressure-swing absorber along the diameter direction and the utilization rate of absorbent are both improved; (2) gas filtering devices are arranged at a raw material gas inletend and a purification gas outlet end so that the treatment effect is more perfect; and (3) the treatment capacity of the absorbent is improved by adopting a nested design.

The present invention provides a stretchable film that is excellent in stretch and strength and water repellency on the film surface, and a method for forming the stretchable film.The present invention was accomplished by a stretchable film including a resin having a branched siloxane bond having 3 to 11 silicon atoms on a side chain and having a urethane bond on a main chain.

The invention particularly relates to a composite baffling revolving bed mass transfer and reaction device. The device comprises a static disk, a fluid distributor, a fluid inlet pipe, a gas outlet pipe, an upper guide flow plate, a lower guide flow plate, a gas inlet pipe, a moving disk, a rotating shaft, a fluid outlet pipe and a shell body; the static disk and the moving disk are placed in the shell body, and several concentric ring shaped guide flow plates with different diameters are arranged on the static disk; evenly distributed circular small holes are arranged on the upper guide flow plate, and several concentric circular cone shaped lower guide flow plates are arranged on the moving disk; evenly distributed puncture holes are arranged on the lower guide flow plate; the upper guide flow plate and the lower guide flow plate are aligned in a staggering manner; the static disk is fixedly connected with a gas outlet pipe, the moving disk is fixedly connected with the rotating shaft; one end of the rotating shaft crosses through the shell body and seals with the shell body. Through changing the flow path of the gas fluid flow body, the uniform gas fluid distribution is improved by fully using the inside diameter direction of a rotor and an axial space, the gas and fluid contact time is effectively prolonged; through adding the gas disturbance degree, the gas phase mass transfer efficiency is improved.

The invention provides a Massive MIMO multi-cell cooperative beam distribution method under a millimeter wave, and belongs to the field of communication. In order to solve the problem of cell thickening and inter-cell interference during antenna beam forming and beam selection. The method comprises the following steps: a first step, with single cell multiplexing as foundation, considering the interference relation of beams in the cells and between adjacent cells, establishing a beam interference model of mobile users in the cells; a second step, calculating total augmentation rates of the cells according to the established beam interference model of the mobile users in the cells, and obtaining an augmentation target function according to the total augmentation rates of the cells; and a third step, using an improved chaos search algorithm to solve 0-1 integer optimization problem of the obtained augmentation target function to obtain an optimal solution and an optimal beam allocation result of the cells in the established model. The massive MIMO multi-cell cooperative beam distribution method provided by the invention can be used for selecting beams in combination the cooperation of multiple base stations in a millimeter wave Massive MIMO scene to realize the optimal performance and greatly reduce the operation complexity.

The invention discloses a portable thermal loading device for a temperature-acceleration composite environment test, comprising a radome having one end open and the other end closed, electric heating membranes and a fan. The radome is in connection with a centrifuge arm through main body bolts; a testpieces is installed on the centrifuge arm through a table top, and is located in the radome; in the radome, a thermal insulation layer is arranged between an outer wall and an inner wall; a plurality of electric heating membranes are uniformly bonded on the inner wall; the fan is installed on the inner wall and is close to the inner bottom center, and the air supply direction just faces the inner bottom center of the inner wall. The portable thermal loading device employs bonded electric heating membranes to realize heating, thereby synchronously controlling the temperature and acceleration, and improving the simulation capability of a temperature-acceleration composite environment test; the radome is of a three-layer structure, thereby reducing the overall mass, and improving insulation effects; the radome is internally provided with the fan, thereby improving the temperature uniformity and the convection heat exchange efficiency of a heating source.

The invention belongs to the technical field of coal-fired boiler atmosphere pollution control, and especially relates to a selective catalytic reduction denitration device and an ammonia spray optimizing method thereof. The method comprises the following steps: simulating the flue gas flowing process of the denitration device to obtain the flue gas flowing and component transporting characteristics in the denitration device, and analyzing the non-uniformity of ammonia nitrogen distribution of a cross section above a catalyst based on the component transporting characteristics of ammonia nitrogen in the denitration device; and calculating the optimum ammonia spraying amount of very ammonia nozzle through a negative feedback iterative technology based on the analysis result of the non-uniformity of the cross-section ammonia nitrogen distribution according to the concentration distribution of the ammonia nitrogen, the partition conditions of an ammonia spray grid and the speed of every ammonia nozzle. The negative feedback iterative technology-based ammonia spray optimization adjusting method rapidly and highly-efficiently improve the non-uniform phenomenon of the ammonia nitrogen distribution of the cross section above the catalyst, increases the denitration efficiency of the denitration device, and reduces the ammonia escaping rate of the denitration device.

The invention relates to the technical field of lightning protection devices, and discloses a lightning protection system for a wind turbine blade. The lightning protection system comprises a blade body lightning arresting unit, a blade tip lightning arresting unit and a lead wire; the blade body lightning arresting unit comprises a blade body lightning arrester and a blade body lightning arresterbase; threaded holes perpendicular to the upper end surface and the lower end surface are correspondingly formed in the upper end surface and the lower end surface of the blade body lightning arrester base; threaded columns matched with the threaded holes are arranged at the lower end of the blade body lightning arrester; the blade tip lightning arresting unit comprises a blade tip lightning arrester and a blade tip lightning arrester base; a clamping groove is formed in the end part of the blade tip lightning arrester; a clamping block matched with the clamping groove is arranged at one endof the blade tip lightning arrester base; threaded holes are formed in the clamping block; and counterbores paired with the threaded holes in the clamping block are formed in the clamping groove. In the scheme, the blade body lightning arresting unit and the blade tip lightning arresting unit are separately connected in a matching manner, so that the surface-surface fit of the lightning arrestersand the lightning arrester bases is realized, the electrical contact area is sufficient, the lightning protection system is stable and reliable, and the phenomenon of sparking is prevented, so that abetter lightning protection effect is achieved.

The invention discloses a virtual sector-based inter-cluster multi-hop clustered routing algorithm VSMC, belonging to the field of network node algorithm. The invention solves the problems that a wireless sensor network consumes a large amount of energy and the cluster head is unevenly distributed. The virtual sector-based inter-cluster multi-hop clustered routing algorithm VSMC comprises the following steps: firstly, performing virtual sector on an area according to the optimal number of cluster heads, so that the number of the cluster heads is kept at the theoretical optimal value and the distribution is uniform; secondly, comprehensively considering energy and geographical location factors to design intra-cluster and inter-cluster cost formulas, and reasonably selecting the cluster headand a father cluster head; and finally, obtaining a distance threshold formula through comparative analysis of energy consumption, and establishing a transmission mode of the inter-cluster multi-hoprouting. Therefore, the VSMC algorithm disclosed by the invention can effectively optimize the uneven distribution of the cluster head and prolong the network life cycle.

The invention relates to the technical field of membranes, and especially relates to a hydrophilic polyether sulfone ultrafiltration membrane and a preparation method thereof. The ultrafiltration membrane comprises polyether sulfone, polyvinyl alcohol, an organic solvent, a pore-forming agent, a crosslinking agent A, and a crosslinking agent B. The preparation method comprises the following step: polyether sulfone and polyvinyl alcohol are dissolved in the organic solvent; the pore-forming agent is added; the mixture is fully mixed through mechanical stirring; the mixture is allowed to stand, and is subjected to vacuum defoaming, such that a clarified transparent solution is obtained; the solution is subjected to membrane scraping on a piece of nonwoven fabric; under the effect of sulfuric acid with a mass percentage of 1%, through a crosslinking reaction, the crosslinking agent A and the crosslinking agent B are grafted on the surface of the ultrafiltration membrane, such that the ultrafiltration membrane is obtained. The obtained ultrafiltration membrane has good contamination resistance, good hydrophilicity, good temperature resistance, and relatively high durability. The properties of the membrane are stable, and the hydrophilic layer is not prone to loss.

The invention relates to the field of roasting kilns and in particular relates to a sleeve type double-hearth shaft kiln. The sleeve type double-hearth shaft kiln is characterized in that inner sleeves are respectively arranged at the centers of two kiln hearths; the upper ends of the inner sleeves are hinged to the upper sides of the kiln hearths; the end sockets of axial positioning clamps are hinged to kiln hearth shells; the inner sleeves are of steel structure bodies from bottom to top; protection covers made of fireproof materials are built outside the inner sleeves; air channels are formed in the inner sleeves; the specification and the size of the shaft kiln are only related to a regional area of an annular section; basically, heights of a preheating region, a roasting region and the like of the kiln body are not changed along with the change of the specification of the kiln. Compared with the prior art, the sleeve type double-hearth shaft kiln disclosed by the invention has the beneficial effects that the resistance loss of the kiln body is low, the phenomenon that heat cannot be distributed uniformly in a roasting process is improved, the quality of a product is high, electric energy can be saved, and the problem in large sizes of lime and dolomite double-hearth shaft kilns is solved; the sleeve type double-hearth shaft kiln is suitable for new construction, reconstruction and extension and the technical design of the conventional kiln with the daily yield being more than 600 tons and even the daily yield being more than thousands of tons.

The invention relates to a crude rubber production system which comprises a crude rubber dehydration device, a crude rubber polymerization reaction device, a crude rubber low-molecular removal device, a crude rubber receiver, a rubber discharge device, a hot oil circulation heating device, a vacuuming device, a nitrogen feeding device and a cooling water circulation cooling device, wherein the hot oil circulation heating device is communicated with the clamp sleeve of the dehydration kettle of the crude rubber dehydration device, the clamp sleeve of the reaction kettle of the crude rubber polymerization reaction device, the clamp sleeve of the devolatiligation kettle of the crude rubber low-molecular removal device and the tubulation preheater of the crude rubber low-molecular removal device; the vacuuming device is communicated with the dehydration kettle of the crude rubber dehydration device, the reaction kettle of the crude rubber polymerization reaction device, the devolatiligation kettle of the crude rubber low-molecular removal device and the tank bodies of the crude rubber receiver and the rubber discharge device; the nitrogen feeding device is communicated with a nitrogen transportation connector piece in the dehydration kettle and the tank bodies of the crude rubber receiver and the rubber discharge device; and the water inlet and water outlet of the cooling water circulation cooling device are communicated with the cooling disks of the crude rubber receiver and the rubber discharge device and a tabulation cooler.

The invention provides a microchannel evaporator and an air conditioner with the microchannel evaporator. The microchannel evaporator comprises a distribution pipe, wherein the distribution pipe is a flat pipe. According to the microchannel evaporator, the distribution pipe is the flat pipe; the section of the distribution pipe is in a flat shape; and the thickness of the distribution pipe is small, so that a refrigerant is prevented from forming laminated flow in which a gaseous phase is positioned on the upper side and a liquid phase is positioned on the lower side in the distribution pipe. In addition, according to the microchannel evaporator, sizes of distribution holes and distance between the adjacent distribution holes are optimized, and the phenomenon of nonuniform distribution of the refrigerant caused by different flow resistances in the flowing process of the refrigerant in the distribution pipe can be improved effectively, so that after being distributed by the distribution pipe, the refrigerant entering a collecting main and the refrigerant entering the flat pipe of the evaporator from the collecting main flow uniformly, and are high in heat exchange efficiency.

The invention discloses a V-SLAM pose estimation method based on a Kinect camera, and the method comprises the following steps: 1) collecting image information through Kinect, obtaining a color imageand a depth image, carrying out the registration of the color image and the depth image, and obtaining a three-dimensional point cloud; 2) performing feature point detection on the acquired color image by adopting an improved FAST, and calculating a descriptor; 3) performing feature point matching on the to-be-matched image and the reference image by using an FLANN matching method to obtain a feature point matching pair; 4) eliminating mismatching of the matching pairs in the step 3); and 5) solving the pose of the accurate matching pair in the step 4). According to the method, an adaptive threshold value is designed according to the gray scale of the image to change the robustness of the algorithm, and meanwhile, dense feature points are screened out by using a non-maximum suppression method after feature point extraction, so that the problem of non-uniform distribution of the feature points is improved. The method has a good pose estimation effect and can be widely applied to the aspects of robots, VR, unmanned aerial vehicles and the like.

The invention relates to a gross rubber production system which comprises a crude rubber dehydration device, a crude rubber polymerization reaction device, a crude rubber low-molecule removal device, a crude rubber receiver, a rubber output device, an internal mixer, a hot oil circulating and heating device, a vacuum pumping device, a nitrogen gas supply device and a cooling water circulating and cooling device, wherein the hot oil circulating and heating device is communicated with the jacket of a dehydration kettle of the crude rubber dehydration device, the jacket of a reaction kettle of the crude rubber polymerization reaction device, the jacket of a low-molecule removal kettle of the crude rubber low-molecule removal device and a pipe array preheater of the crude rubber low-molecule removal device; the vacuum pumping device is communicated with the dehydration kettle of the crude rubber dehydration device, the reaction kettle of the crude rubber polymerization reaction device, the low-molecule removal kettle of the crude rubber low-molecule removal device and the tank bodies of the crude rubber receiver and rubber output device; the nitrogen gas supply device is communicated with a nitrogen gas transmission interface of the dehydration kettle and the tank bodies of the crude rubber receiver and rubber output device; and water inlet and water outlet of the cooling water circulating and cooling device are communicated with a cooling coiled pipe and a pipe array cooler of the crude rubber receiver and rubber output device.

The embodiment of the invention provides a data equalization method and device for distributed storage, and relates to the technical field of distributed storage. The method comprises the steps of generating a mapping relation table corresponding to object storage equipment and a reduction group in each storage node; based on the number threshold of the reduction group, adjusting the sorting groups corresponding to the object storage devices with the number higher than and lower than the number threshold value, so that the number of the sorting groups corresponding to each object storage device tends to the number threshold value and is relatively uniform, the problem of non-uniform distribution of data in the storage process can be improved, and the utilization rate of the storage space is improved.

The invention discloses a preparation method of a graphene elastic screen cloth enhanced carbon fiber fishing rod, and belongs to the technical field of polymer materials. The preparation method is characterized in that at first, expanded graphite is peeled to form a graphene dispersion liquid, then the graphene dispersion liquid is spray-dried to prepare graphene micro-sheet powder, the graphenemicro-sheet powder is dispersed into single component thermoplastic elastic polyurethane resin to prepare slurry, the slurry is sprayed or painted on a latticed PP board, after the slurry is completely dried, graphene elastic screen cloth is obtained; then the graphene elastic screen cloth is combined with carbon fibers to prepare carbon fiber prepreg, and finally the prepreg is cut and rolled toprepare the fishing rod. According to the preparation method, graphene is dispersed into thermoplastic elastic polyurethane resin in advance, then graphene elastic screen cloth with a small thicknessis prepared by a spraying or painting technology, finally the graphene elastic screen cloth is combined with carbon fibers, the problem that the agglomeration of graphene in resin happens easily whengraphene is directly dispersed in resin for preparing carbon cloth is solved, the situation that the distribution of graphene in carbon cloth is uneven is improved, the stress defects are reduced, andthe bearing force of the fishing rod is obviously enhanced.

The invention discloses a battery box thermal management system in consideration of heat recovery and a control method thereof, and relates to a battery box thermal management system. The system includes a battery box heat dissipation structure module and a control module. The battery box heat dissipation structure module includes a liquid-cooling thermal management device and an air-cooling thermal management device. The liquid-cooling thermal management device includes multiple heat dissipation structure liquid-cooling plates. The air-cooling thermal management device includes a fan with a curved flow deflector. The control method comprises detecting a battery surface temperature; determining a temperature range of the battery surface by a controller; sending instructions to a corresponding execution unit; and preheating or cooling the battery module. The battery box thermal management system and the control method thereof can effectively control the temperature of a power battery, improve the consistency of the temperature of the battery box, and recover the generated heat to provide power for an air-cooling device.

The invention provides a touch display substrate and a touch display device. The touch display substrate comprises an underlayer substrate which comprises a display area and a lead area, multiple touch electrodes and multiple wires are arranged in the display area, the wires comprise touch electrode wires used for being connected with the touch electrodes and auxiliary wires which are not connected with the touch electrodes, at least two wires are arranged in an orthographic projection area of each touch electrode on the underlayer substrate, multiple leads are arranged in the lead area, and each wire is connected with a touch signal output end of a driving circuit through the corresponding lead. Accordingly, at least two wires are arranged in the orthographic projection area of each touchelectrode on the underlayer substrate, and then the at least two wires can be distributed in the area where the touch electrodes are located as uniform as possible, the problem that the touch electrode wire distribution is nonuniform is solved, and the display uniformity of the touch display device containing the touch display substrate is improved.