1461 results about "Distribution uniformity" patented technology

A plasma reactor for processing a semiconductor workpiece, includes a reactor chamber having a chamber wall and containing a workpiece support for holding the semiconductor support, the electrode comprising a portion of the chamber wall, an RF power generator for supplying power at a frequency of the generator to the overhead electrode and capable of maintaining a plasma within the chamber at a desired plasma ion density level. The overhead electrode has a capacitance such that the overhead electrode and the plasma formed in the chamber at the desired plasma ion density resonate together at an electrode-plasma resonant frequency, the frequency of the generator being at least near the electrode-plasma resonant frequency. The reactor further includes a set of MERIE magnets surrounding the plasma process area overlying the wafer surface that produce a slowly circulating magnetic field which stirs the plasma to improve plasma ion density distribution uniformity.

A catalyst for the catalytic combustion of combustible waste gas is prepared by dipping the Pt as active component on the coated layer of cellular ceramics as carrier. The said coated layer contains Al2O3 (20-80 wt.%), TiO2 (10-40 wt.%), CeO2 (5-30 wt.%) and ZrO2 (5-20 wt.%). Its advantages are high utilization rate of Pt, and high distribution uniformity.

The invention belongs to the technical field of material processing, and particularly relates to a molybdenum alloy target preparation method. Alloy powder is formed by molybdenum powder and other metal powder in a mechanical alloying mode, the alloy powder is processed, and a molybdenum alloy target is obtained. The mechanical alloying process is adopted, so that distribution uniformity and alloying performance of the powder raw materials are better; hot isostatic pressing is conducted after cold isostatic pressing, so that the compactness of the molybdenum alloy target is better; through the multi-stage degassing process, the oxygen content of the molybdenum alloy target is lower, and the degassing performance is better.

A lighting device improves light distribution uniformity. When a light emitting diode (LED) package module is applied to a straight-tube fluorescent lamp, characteristics of a circular surface light source with the LED may be efficiently embodied by varying a refractive index of a light guide member based on positions of the light guide member.

A light emitting device package is disclosed. The light emitting device package includes a body having a cavity, a light source mounted in the cavity, and at least one optical sheet located on the body to cover the cavity. The optical sheet includes a first layer and a second layer formed on the first layer, wherein the second layer includes a plurality of linear prism parts. At least one of the first layer and the second layer contains a light diffusive member. The light emitting device package has enhanced light emission efficiency and light distribution uniformity.

Provided are a composite polymer electrolyte for a lithium secondary battery in which a composite polymer matrix multi-layer structure composed of a plurality of polymer matrices with different pore sizes is impregnated with an electrolyte solution, and a method of manufacturing the same. Among the polymer matrices, a microporous polymer matrix with a smaller pore size contains a lithium cationic single-ion conducting inorganic filler, thereby enhancing ionic conductivity, the distribution uniformity of the impregnated electrolyte solution, and maintenance characteristics. The microporous polymer matrix containing the lithium cationic single-ion conducting inorganic filler is coated on a surface of a porous polymer matrix to form the composite polymer matrix multi-layer structure, which is then impregnated with the electrolyte solution, to manufacture the composite polymer electrolyte. The composite polymer electrolyte is used in a unit battery. The composite polymer matrix structure can increase mechanical properties. The introduction of the lithium cationic single-ion conducting inorganic filler can provide excellent ionic conductivity and high rate discharge characteristics.

The invention provides salt coating liquid. The salt coating liquid is made with, by weight, 0.5-10% of calcium acetate and 90-99.5% of tobacco sheet coating liquid. After treated by a high-temperature process, the calcium acetate in the salt coating liquid is partially decomposed into calcium carbonate which can convert on the surface of the reconstituted tobacco into a great amount of calcium carbonate particles, so that retention rate and distribution uniformity of the calcium carbonate in the reconstituted tobacco can be significantly improved, specific area is greatly increased, a novel microporous structure is generated, water absorbing and moisture preserving performances of the structure are effectively improved, whiteness and flame retention rate of ash from combustion of the reconstituted tobacco can be improved, bulkiness of the reconstituted tobacco is improved, and thickens of the reconstituted tobacco is increased; in terms of smell absorption, tobacco miscellaneous odors can be decreased, irritation is lowered and comfort is improved. In addition, the undecomposed calcium carbonate is hydratable calcium salt with very high hygroscopic property; good moisture preserving effect and certain mould resistance are provided.

An open grid fabric resin infusion medium and reinforcing composite lamina used in the manufacture of fiber reinforced polymer resin composites. The use of the open grid fabric as at least one of a composite lamina provides significant improvements in both the resin infusion rate and resin distribution uniformity throughout the laminate.

In one embodiment, the invention is a light emitting diode module with improved light distribution uniformity. One embodiment of a signal head includes a light emitting diode and a reflector cup positioned to reflect light emitted by the light emitting diode, the reflector cup having a non-symmetrical curvature.

The invention discloses a detect method of droplet distribution uniformity, which can detect the droplet uniformity in the spray test of sprayer. The inventive method comprises a spray droplet collecting step for collecting the sprayed droplets of a sprayer, a droplet picture pick-up step for using a digit picture pick-up device to pick up the picture of the collected sprayed droplets, a computer droplet picture information obtaining-processing step that the digit picture pick-up device transmits the droplet picture information to the computer for image processing, and a droplet distribution uniformity information obtaining step for obtaining the droplet number and area information according to the result of the image processing to obtain the droplet distribution uniformity information.

The invention discloses a composite abrasive grain in a grain/alumina core-shell structure and a preparation method and the application of the composite abrasive grain. An inner core of the composite abrasive grain is selected from diamond, carbide and the like serving as abrasive grains, and an outer shell of the composite abrasive grain is an alumina-coated layer. The preparation method includes: firstly, adding pretreated powder into buffer solution of a certain pH (potential of hydrogen) value, ultrasonically dispersing for 1h, and heating to 50-80 DEG C; secondly, preparing a coating precursor into 0.05-0.4mol/L solution, dripping the solution drop by drop into the buffer solution, violently stirring and keeping the pH value constant; and finally, separating reactants, drying for 24h at 120 DEG C, and performing heat treatment at 300-550 DEG C for more than one hour to obtain the composite abrasive grain in the grain/alumina core-shell structure. Holding power of an abrasive tool base to abrasive grains can be improved to effectively solve the problem of shedding of the abrasive grains, utilization rate of the abrasive grains is increased, the service life of an abrasive tool is prolonged, and uniformity in distribution of the abrasive grains can be remarkably improved.

The present invention is a method of controlling an irrigation system that minimizes the amount of irrigation water applied with the use of evapotranspiration (ET) to adjust the irrigation controller. By basing the irrigation program on run times which equal a specific amount of water, ET can be used as a percentage to adjust the amount of water applied during an irrigation cycle. By setting a run time to equal 1″ of rainfall ET can be used as a multiplier against the run time to make the correct adjustment to provide required water. By setting the amount of water to be applied to 2″ or any other amount would need an additional multiplier added to make the proper adjustment. Adjustments for landscape coefficient and distribution uniformity would be placed in run time formula based on use of ET set at 1″. The adjusted run time would be the input into the control system.

The invention discloses a high-stability conductive slurry. The conductive slurry comprises silver powder, a blinder, a stabilizer and a solvent. The silver power can be micrometer silver powder, nanometer silver powder or a combination of the two in any proportions; through adding the stabilizer, the slurry deposition layering phenomenon generated during the preparation, transportation and storage process of the conductive slurry, and the consistency of the conductive slurry, the distribution uniformity and flatness of the a conductive slurry on a base material are ensured; and the stability of the conductive slurry is effectively enhanced, the application and storage life of the conductive slurry is prolonged, and the high-stability conductive slurry and the preparation method are widely applied to conductive slurry fields such as an RFID antenna, a touch screen line, a flexible printed circuit (FPC), a film switch, a solar battery, a printed circuit board and the like.

The invention relates to a paint film thickness measuring method based on terahertz pulse spectrum. The paint film thickness measuring method is characterized in that a paint film thickness measuring model can be established; a terahertz time domain spectrum device is used to measure terahertz pulse spectrum of a sample to be measured, the surface of which is covered by paint; a delay time difference of a reflection peak can be acquired according to the terahertz pulse spectrum; and the paint film thickness of the sample to be measured can be calculated according to the established paint film thickness measuring model. The paint film thickness measuring method based on the terahertz pulse spectrum is advantageous in that the new method can be provided for the paint film thickness measurement; and after the non-contact detection of different measuring points, the single-layer and multi-layer paint film thickness and the distribution uniformity can be detected.

The invention discloses a simulating platform of the fume denitration device flow field distributing structure and a testing method. At present the denitration efficiency of the fume denitration device is greatly affected by the fume velocity distributing uniformity and the reducer ammonia gas/nitrogen oxide mixing uniformity. The invention includes an inlet pipe, a coal economizer, an inlet flue, a current stabilizing plate, a reactor, an outlet flue and a blower connected in turn, wherein an ash bucket is arranged at the round of the bottom of the inlet flue, and an air jetting device is arranged on the vertical section of the inlet flue. Guide plates located on the bottom of the top flue are arranged on the round of each flues. A plurality of layers of catalyzer are provided in the reactor, and a plurality of speed measuring holes are arranged at the entrance of the air jetting device and under the current stabilizing plate. The invention builds the simulating platform of the denitration device flow field structure, performs the experiment through the simulating platform, obtains the flow field distributing status of the denitration device, provides reasonable engineering measurement to improve the flow field distributing structure in the denitration system.

A counterpressure/temperature control apparatus, comprises: a mold, having a runner and an air passage, both coupled to a mold cavity inside the mold; a logic control valve, coupled to the air passage for controlling a high-temperature gas or/and a counterpressure gas to flow in and out the mold cavity; a counterpressure gas supplying device, for supplying the counterpressure gas to the mold cavity through the logic control valve; and a high-temperature gas supplying device, for supplying the high-temperature gas to the mold cavity through the logic control valve; wherein the mold cavity is heated by the high-temperature gas, while subjecting the same to a counterpressure provided from the counterpressure gas supplying device during an injection molding process, and thereby, not only the surface quality of a product resulting from the injection molding process can be improved, but also the size of foams and the distribution evenness thereof are enhanced.

The invention discloses a many-objective optimized scheduling method for combined operation of cascade hydropower stations, and aims at solving main problems in engineering application of standard quantum-behaved particle swarm optimization and problems in solving single-objective optimized scheduling. A multi-population evolution strategy is realized by external file set, advantageous individual selection and a chaotic mutation operator strategies, diversity of individuals is ensured, calculation of the method is accelerated, and an approximate Pareto optimal leading edge with sound distribution is obtained. An external file set is introduced to store elite individuals, dynamic update and maintenance of the file set are realized via non-inferior layered ordering and crowd distance, and distribution of the individual is kept uniform; and a chaotic mutation operator is used to carry out local disturbance on a non-control solution, and the neighborhood exploration capability of the individuals is enhanced. According to the invention, the particle swarm optimization is improved, and effectively applied to making the many-objective optimized scheduling scheme of combined operation of the cascade hydropower stations, and a feasible and high efficiency calculating method is provided for many-objective optimized scheduling of the cascade hydropower stations.

The invention discloses a luminance uniformity test method of a dot-matrix light source, and relates to the technical fields of display, illumination and image processing. According to the luminance uniformity test method, the luminance uniformity is divided into brightness uniformity and distribution uniformity; the luminance uniformity of the dot-matrix light source is evaluated through the brightness uniformity, the distribution uniformity and the sum of the brightness uniformity and the distribution uniformity; in the testing process, image geometric distortion is corrected; the dot-matrix structure is analyzed, and the non-light-emitting area is excluded from the evaluation range. Compared with the existing test method, the luminance uniformity test method is more comprehensive, objective, accurate, effective, direct, simple and convenient.