44results about How to "Avoid performance differences" patented technology

The invention discloses a feeding method for improving the uniformity of components of a head of a TC4 cast ingot. The method comprises the following steps: proportioning sponge titanium and an intermediate alloy according to a proportion required by GB/T3620.1; mixing the materials and pressing the materials into an electrode block; after carrying out vacuum plasma welding on the electrode block,carrying out vacuum arc furnace smelting, wherein in the smelting process, the residual weight and the argon filling pressure of the electrode are strictly controlled in the third time smelting feeding stage; and finally, carrying out surface machining to obtain a finished product cast ingot. The feeding method disclosed by the invention solves the problems that the center Al element of the existing phi720mm specification TC4 cast ingot is relatively low and the phase transformation point of the cast ingot is greatly deviated.

The invention discloses a preparation method of a component-gradient-controllable multi-element ultrahigh-temperature ceramic modified C/C composite material. Through multi-section design of various ultrahigh-temperature ceramics (ZrC, HfC, HfB2 and the like) and high-temperature ceramic (SiC) composite modified C/C composite materials, a ceramic phase forms a continuous component gradient distribution form in a C/C matrix, ablation resistance and oxidation resistance requirements of different temperature range fields are met regionally, and meanwhile the defect that the mechanical property isreduced due to component mutation is overcome. According to the invention, a preparation process of combining molten salt infiltration and common reaction infiltration and gradient infiltration powder configuration are adopted in sections, so that near-ablation-end strong ceramic phase interface design is realized, and ceramic phase distribution realizing that the content of an ultrahigh-temperature ceramic phase is sequentially decreased from the near ablation end to a far ablation end and the high-temperature ceramic phase is sequentially increased is regulated and controlled; finally, thegradient ceramic-based composite material with different ceramic phase components and contents in gradient change and meeting the performance requirements of the material is formed.

The invention discloses a sensor calibration method, a sensor and air treatment equipment. The sensor calibration method comprises the following steps: acquiring a calibration instruction; adjusting emission light intensity of detection light, and acquiring receiving light intensity of light received by a light receiving assembly; when a difference value obtained by subtracting first preset lightintensity by the receiving light intensity is more than or equal to zero, and less than or equal to a first preset difference value, updating standard emission light intensity to the current emissionlight intensity, and updating detection reference light intensity to the current receiving light intensity. The sensor calibration method improves the consistency of sensors.

The invention discloses a coating rubber roller for a high-grade automobile plate production line and a manufacturing method thereof, belonging to the field of rubber rollers and preparation methods thereof. The rubber for the rubber roller comprises the following components in percentage by weight: 50.7-58.1% of ethylene-propylene rubber, 29.1-38.1% of carbon black, 2.5-2.9% of naphthenic oil, 2.5-2.9% of ester oligomer, 2.5-2.9% of tackifier, 1.0-1.2% of flow promoter, 1.9-2.2% of vulcanizing agent DCP, 0.28-0.32% of sulfur, 0.18-0.20% of accelerator BZ and 0.18-0.20% of accelerator DPTT. The method comprises the following steps: compounding the rubber; winding and rubberizing; vulcanizing in a vulcanizer; and carrying out lathe grinding. In the rubber compounding process, the materials can be sufficiently dispersed and fused. the rubberizing grain color difference on the roller surface can be eliminated, the consistency of internal and external hardness of the rubber roller is high, and the material distribution consistency and roller surface roughness consistency are high, thereby satisfies the operational requirements for the coating rubber roller for a high-grade automobile plate production line.

The invention discloses a preparation method of a low-thermal-resistance gallium nitride high-electron-mobility transistor epitaxial material, and belongs to the technical field of semiconductor epitaxial materials. According to the invention, the method comprises the steps: employing high-temperature chemical vapor deposition equipment for carrying out high-temperature etching on the surface of a silicon carbide substrate, so the surface of the substrate presents controllable atomic-scale step morphology; carrying out the atomic-scale aluminum nitride nucleation on silicon carbide atomic steps by utilizing a metal organic chemical vapor deposition technology; transversely and rapidly combining the aluminum nitride nucleation points in an intermittent source supply mode, and performing layered deposition, so high-quality nanoscale aluminum nitride nucleation layer growth is achieved, and the gallium nitride high-electron-mobility transistor is prepared by taking aluminum nitride as a substrate. According to the method, the thickness of the aluminum nitride nucleating layer can be greatly reduced, the interface thermal resistance introduced by the aluminum nitride nucleating layer can be effectively reduced, the heat dissipation characteristic of the gallium nitride power device can be improved, and the method has extremely important significance for improving the power performance of the gallium nitride microwave power device.

The invention belongs to the technical field of steel materials, and discloses a production method of a high-quality thick steel plate. The production method comprises the steps that the procedure ofhigh-temperature rolling and the procedure of low-temperature rolling are conducted in a non-recrystallization area in the rolling process, wherein the procedure of high-temperature rolling comprise afirst finish rolling stage, and in the first finish rolling state, a low-speed high-pressure rolling process is adopted, the initial rolling temperature is 900-930 DEG C, a required cumulative rolling rate is equal to or greater than 15%, and the maximum single-pass rolling rate is equal to or greater than 12%; the procedure of low-temperature rolling comprises a second finish rolling stage, andin the second finish rolling stage, a low-temperature high-pressure rolling process is adopted, the initial rolling temperature of a steel plate is 780-820 DEG C, and the finish rolling temperature is760-780 DEG C; and steel is discharged after being rolled and then rapidly enters water to be cooled. By adoption of the production method of the high-quality thick steel plate, the performance of the high-strength and high-tenacity thick steel plate produced through a continuously cast plate is improved, and meanwhile, the technical problems of slow rolling rhythm and low efficiency are solved.

The invention discloses an auxiliary camera module and a camera device with the auxiliary camera module. The auxiliary camera module comprises an auxiliary lens group, a first photoreceptor and a reflection device group, the auxiliary lens group comprises a first auxiliary lens used for collecting a first light beam and a second auxiliary lens used for collecting a second light beam. The reflection device group is used for being driven to rotate to reflect one of the first light beam and the second light beam into the first photoreceptor, and the first light beam or the second light beam is imaged in the first photoreceptor after being emitted into the first photoreceptor. By arranging the reflection device group, one of the different auxiliary lenses is selected to be matched with the photosensitive chip for use, so that a multi-camera function based on one photosensitive chip is realized, the number of the photosensitive chips is reduced, and the production cost is reduced; in addition, the same photosensitive chip is adopted in the process of switching the auxiliary lens, so that the effect difference caused by the difference between the photosensitive chips can be avoided.

The invention belongs to the field of metal materials, and specifically discloses a steel wire rod for aluminum-containing steel fibers and used for deep drawing, and a rolling method thereof. A continuous casting billet comprising specific components is obtained according to an aluminum-containing pure steel smelting process, reasonable heating temperature and heating time of the continuous casting billet are controlled in a heating furnace, and the process parameters of the wire rod in a rolling process and the cooling process parameters of the wire rod on a Stelmor cooling line are optimized, so that the produced wire rod for the steel fibers is high in universality, uniform in structure, small in crystal grain, excellent in mechanical property, and good in plasticity index, and an ironoxide sheet has a thickness of 10-20[mu]m, and is suitable for mechanical shelling and low in wire fracture; and the wire rod produced by the method has tensile strength Rm of 350-390MPa, percentageelongation A of not less than 40% after fracture, area reduction Z of not less than 80%, and ferrite grain size of 7-8, the wire fracture in a drawing process of a user can be controlled to be less than 0.25 times per ton, and the technical requirement of a wire rod for high-grade steel fibers is completely met.

The invention provides a backward projection imaging method based on random reference average cross-correlation information, belongs to the technical field of radar image processing, and solves the problems of high sidelobe and interference and poor imaging performance of the conventional backward projection imaging method. The concrete process of the backward projection imaging method comprises the following steps that step one, as for the radar acquisition data, the time delay of a target to be imaged relative to the synthetic aperture location and the transmitting pulse single center frequency are calculated so as to obtain the echo data matrix of points to be imaged; step two, three sets of cross-correlation coefficient vectors are calculated by using an intermediate reference echo vector and random reference echo vectors of the left and right sides, and the average value of the cross-correlation coefficients of the three sets of cross-correlation coefficient vectors is calculated;step three, two thresholds are set and the average value of the optimal cross-correlation coefficients is selected; and step four, the amplitude value of the points to be imaged is calculated by using the obtained average value of the optimal cross-correlation coefficients and the echo vectors; and the steps one to four are repeated and all the points to be imaged are scanned so as to obtain theimaging result. The backward projection imaging method can be used for the field of radar image processing.

The application relates to a speech speed recognition method and device, a server and a computer readable storage medium. The method comprises the steps: dividing an original audio frame sequence intoa plurality of audio units according to a preset rule, extracting audio features of the audio units in the original audio frame sequence, and inputting the audio features of the audio units into a preset speech speed recognition model. The speech speed does not need to be calculated in a specified time period, so that the effect difference caused by different sizes of the specified time period isavoided; and the accuracy of the speech speed identified by the trained preset speech speed identification model is relatively high. Moreover, the preset speech speed recognition model can recognizethe real-time speech speed of the original audio frame sequence according to the audio features of the audio unit, thereby capturing the dynamic change condition of the speech speed of the user, and satisfying the demands of more scenes.

The invention provides a rapid thermal annealing process capability monitoring method. A plurality of test zones are arranged in an area between a wafer edge and a wafer circle center, and then the surface of the wafer is subjected to non-crystallizing; next, an active region is subjected to normal source-drain ion implantation and rapid thermal annealing process, wherein the rapid thermal annealing process is used for repairing and activating the impurities injected in the active region, and the crystal lattice defect caused by non-crystallizing of the surface of the wafer is repaired; the actual corresponding relation between the crystallization parameter of the surface and the position of the wafer is obtained by acquiring the crystallization parameters of the test region; the actual corresponding relation is compared with an ideal corresponding relation, and whether the rapid thermal annealing process capability meets the control requirements or not can be judged, so that the online monitoring of the rapid thermal annealing process is realized, and the performance difference of the device caused by differences between different batches of wafers is avoided.

The invention provides asphalt concrete capable of resisting water damage. The asphalt concrete is prepared from 85 to 90 weight percent of aggregate, 4 to 6 weight percent of SBS modified asphalt, 0 to 2 weight percent of polysiloxane powder, 0 to 2 weight percent of talcum powder, 0 to 5 weight percent of 3-(methylacryloyloxy)propyltrimethoxysilane and 0 to 2 weight percent of white carbon black. According to the invention, the 3-(methacryloyloxy)propyltrimethoxysilane can improve the bonding strength of asphalt and aggregate and resist the erosion of water; the white carbon black has better dispersity, so the uniformity of the coating thickness of the suspension on the surface of the aggregate can be improved, and performance difference caused by non-uniform thickness is avoided; and the polysiloxane powder has good bonding strength with asphalt, has strong hydrophobicity, can repel erosion of water to an asphalt-aggregate interface, and can effectively solve the problem of water damage to asphalt concrete. The invention also provides a preparation method of the asphalt concrete capable of resisting water damage.

The invention relates to a PECVD coating method of an efficient heterojunction solar cell. The PECVD coating method comprises a gradient I layer deposition method. According to the gradient type I layer deposition method, a PECVD method is used for decomposing reaction gas to conduct intrinsic I type amorphous silicon deposition, the hydrogen content in the reaction gas is gradually increased, and the intrinsic I type amorphous silicon deposition rate is gradually reduced. According to the PECVD coating method for the efficient heterojunction solar cell provided by the invention, the passivation effect can be improved, and the performance of an intrinsic I-type amorphous silicon film can be optimized to the greatest extent.