42results about How to "Overcome unevenness" patented technology

A display device includes luminescence pixels arranged in rows and columns. Each of gate lines and reset lines correspond to one of the rows, and signals lines each correspond to one of the columns. Each luminescence pixels includes a luminescence element, a switching transistor, a drive transistor which supplies current to the luminescence element, and a reset transistor. The reset transistor includes a gate terminal connected to a corresponding reset line, one of a source and drain terminal connected to a source or drain terminal of the drive transistor, and the other of the source and drain terminal connected to a corresponding gate line. A capacitor is connected between the gate terminal and the source terminal of the drive transistor.

The invention discloses a natural fiber-reinforced polyurethane elastomer composite material. The natural fiber-reinforced polyurethane elastomer composite material is prepared from the following components in parts by weight: 30-70 parts of natural fibers and 70-30 parts of polyurethane elastomers, wherein the natural fibers are selected from jute, sisal, hemp, flax and ramie, and the polyurethane elastomers are selected from hard polyurethane elastomers, soft polyurethane elastomers or half-hard polyurethane elastomers. The invention further discloses a preparation method of the natural fiber-reinforced polyurethane elastomer composite material. According to the natural fiber-reinforced polyurethane elastomer composite material and the preparation method, as the degradable natural fiber is taken as the raw material, the environmental protection is benefited; and the raw materials of a component A and a component B of liquid polyurethane are mixed to soak a natural fiber felt and then the natural fiber felt is cured and formed, so that the problem of the uneven surface of a product, caused in the conventional pouring process of the glass fibers and the polyurethane elastomers, is overcome, and the prepared composite material has the characteristics that the abrasive resistance is good and the shock strength is improved and can be used for replacing the conventional glass fiber-reinforced composite material to be used in automotive interior decoration parts.

The invention provides a cavity type bulk acoustic wave resonator with a support column and a preparation method of the cavity type bulk acoustic wave resonator. The method comprises the following steps of: taking a piezoelectric single crystal wafer which is subjected to ion implantation and is provided with a bottom electrode; forming a plurality of supporting columns on one side, with the bottom electrode, of the piezoelectric single crystal wafer; forming a cavity at the gap of supporting columns, taking the substrate, bonding the substrate with one side of the piezoelectric single crystalwafer with the cavity, carrying out heat treatment on the substrate after bonding, stripping a film of the piezoelectric single crystal wafer, and producing a top electrode on the stripped side of the piezoelectric single crystal wafer to obtain the piezoelectric single crystal wafer. According to the technical scheme provided by the invention, a sacrificial layer does not need to be grown, etching and trepanning are not carried out on the thin film, the mechanical strength of the device is improved, and the thin film is not easily damaged; the cavity structure is formed before film formation, the rate of finished products is high, residues left by etching after film formation do not exist, and the influence of incomplete release on the device does not need to be considered.

The present invention relates to a method for manufacturing a protecting cover which can prevent the electromagnetic wave interference, wherein the method comprises the following steps: preparing a mold; executing compression fitting with the mold to the plastic film which is formed with a base board, side boards and dividing strips for forming the casing with a protecting cover; and plating the metal coating layer on the surface of casing. Therefore the mutual interference of electromagnetic wave of each module in different areas can be effectively prevented.

The invention provides a method for laminating a multilayer printed circuit board. An outer layer of the multilayer printed circuit board (PCB) is manufactured by adopting a prefabricated core board, wherein the core board is formed by two conductive layers and a solidification piece, the solidification piece is located between the two conductive layers, and the two conductive layer form an outer layer and a secondary outer layer of the multilayer PCB respectively. The method provided by the invention overcomes a problem of unevenness of the PCB surface, and improves the manufacturing quality of the PCB.

An objective of the present invention is to provide a ceramic heater making it possible to prevent a short circuit in its resistance heating element and heat a semiconductor wafer evenly. The ceramic heater of the present invention is a ceramic heater comprising: a ceramic substrate; an insulating layer having volume resistivity higher than that of said ceramic substrate, being formed on at least a part of said ceramic substrate; and a resistance heating element formed on said insulating layer.

The invention relates to a steel truss arch bridge installation system. The steel truss arch bridge installation system involves a steel truss assembling and splicing base frame, a steel truss in-water installing support, a steel truss installing attaching type construction platform and a steel truss arch bridge pick arm hanging frame construction platform; the steel truss assembling and splicing base frame comprises connecting grooves, connecting steel sheets, base frame steel plates, base frame supporting legs and supporting leg lifting adjusting devices; the steel truss in-water installing support comprises top adjusting devices, steel pipe connecting devices and steel pipe piles; the steel truss installing attaching type construction platform comprises hanging baskets, upper rolling wheels, lower rolling wheels, upper face plates, lower face plates and steel beam splicing plates; and the steel truss arch bridge pick arm hanging frame construction platform comprises hanging frame rails, universal rolling wheels, pick arms, bottom plates and rail clamping devices. The steel truss arch bridge installation system has the beneficial effects that the arranged steel truss assembling and splicing base frame can solve the problem that a pre-assembling site is not flat, a base is stable and does not slip, and the base frame with the corresponding size can be quickly assembled according to the size of a pre-assembled unit so that steel truss components can be rapidly trial-assembled.

The invention discloses a numerical sample and random forest-based TBM jamming risk prediction method. The method comprises the steps: building a refined numerical simulation model, simulating the aging deformation of surrounding rock based on a creep damage model, and achieving the simulation of a TBM construction process; setting values of different card machine influence factors in the numerical simulation model, and calculating numerical samples containing different working conditions; establishing a jamming risk discrimination index, and calibrating the jamming risk level of the sample; and establishing a random forest model, performing model training based on the numerical samples, and predicting the jamming risk level of the actual construction section by using the trained random forest model. According to the method, the jamming numerical value sample library is constructed based on refined numerical value simulation, and the problems of few monitoring samples and imbalance existing in application of machine learning in engineering are solved; by using the trained random forest model, the jamming risk level of the actual construction section can be quickly predicted, so that early prevention and control of disasters are guided, and safe and efficient construction of the TBM is ensured.

A method for ironing words and drawing on reed leaf used to wrap the dumpling made of glutinous rice features that the radiated heat (laser beams controlled by computer, for example) is used to write or draw on the reed leaf to make it charred to different extents. Its advantages are non contacting mode, and high productivity and rate of finished products.

The invention discloses a potential customer identification method and system based on longitudinal federated learning and a medium, and the method comprises the steps that a first loss value of an updated first preset logistic regression model is obtained through the calculation of a local end, and a second loss value of an updated second preset logistic regression model is obtained through the calculation of a participating end; finally, the local end and the participating end judge whether all preset stopping conditions are met at the same time or not according to the corresponding first loss value and the second loss value, and if yes, the local end and the participating end recognize the customer according to a preset potential customer recognition method so as to complete recognition of potential customers; and if not, the appointed steps are repeatedly executed, and judgment is carried out again. According to the potential customer identification method and system based on longitudinal federated learning and the medium provided by the embodiment of the invention, the accuracy of identifying potential customers is improved.

The invention relates to a building board, in particular to a heat insulating and sound isolating decorative corrugated composite board which comprises a metallic board and a metallic corrugated board, wherein a resin layer is respectively attached to the lower surface of the metallic corrugated board and the back surface of the metallic board; the metallic board and the metallic corrugated board are bonded and composited together between the resin layer on the lower surface of the metallic corrugated board and the resin layer on the back surface of the metallic board through a bonding agent; a heat insulating and sound isolating layer is also bonded on the upper surface of the metallic corrugated board; the heat insulating and sound isolating layer is a heat insulating and sound isolating board or sound isolating cloth; a resin layer is also arranged between the upper surface of the metallic corrugated board and the heat insulating and sound isolating layer; and the resin layer is attached to the upper surface of the metallic corrugated board. The heat insulating and sound isolating decorative corrugated composite board has higher strength and good surface smoothness and meets the national standards.

The invention discloses a wax-throwing machine with a water groove. The wax-throwing machine comprises an open width washing and spray device (09), a rotating wax-throwing cylinder (02), a width expanding cropping device as well as a power and driving device, and the wax-throwing machine is characterized in that the wax-throwing cylinder is a one-way rotating wax-throwing cylinder; the lower part of the wax-throwing cylinder is provided with a water supplying groove (01), and the lower part of the wax-throwing cylinder stretches 1-2.5cm into a water supplying groove inner water surface (05); the inner wall of the wax-throwing cylinder is provided with three levogyration spiral ribs (03), and the spiral ribs and the axial lead of the wax-throwing cylinder can form a 20-degree angle (07); the levogyration spiral ribs of the wax-throwing cylinder and the left side of the lowest position in the wax-throwing cylinder can form a chord tangent angle (08) which is 60 degrees, and the wall of the wax-throwing cylinder is provided with a plurality of through holes (04) the diameters of which are 2-2.5cm. The wax-throwing machine provided by the invention has the advantages that the manufactured wax stripe is distinct and fine and smooth, the consistency is good, a wax printed cloth is prevented from twisting, and the residual wax is easy to clean; the wax-throwing machine also adopts the one-way rotation, and disadvantage that the wax stripe has defects because the wax printed cloth twists is effectively solved.