37results about How to "Do not change size" patented technology

The invention discloses a high time resolution low noise single photon detector based on optical pulse synchronization. The single photon detector comprises an optical pulse generator, an optical fiber coupler, an optical attenuator, an optical delayer, a photoelectric conversion module, a gate pulse amplifier module and a signal extraction module, wherein the optical pulse generator is connected with the optical fiber coupler and divided into two paths, one path is connected with the optical attenuator, the optical attenuator is connected with the optical signal input end of the gate pulse amplifier module, the other path is connected with the optical delayer, the optical delayer is connected with the optical signal input end of the photoelectric conversion module; the output end of the photoelectric conversion module is connected with the electric signal input end of the gate pulse amplifier module; and the electric signal output end of the gate pulse amplifier module is connected with the signal extraction module. The single photon detector uses the optical delayer and the photoelectric conversion module to convert the optical signals to Gaussian electric signals which are used as gate pulse signals, thus the noise of the avalanche photo diode (APD) caused by capacitance effect can be reduced and the signal-to-noise ratio can be increased.

The spray booth has no trouble for the paint attached to the ceiling of the spray booth to fall onto the sprayed article contaminatively and has changeable front opening size for minimized airflow rate for spraying. The spray booth is provided with one rotary filter net, one movable filter net wall near the ceiling for removing the paint attached to the filter net, and one removing device outside the spray booth to operate regularly for removing the attached paint. In addition, the spray booth has one front movable reduced opening, and the opening may be moved and changed in area based on the size and the shape of the sprayed article so as to minimize the airflow rate for spraying.

The invention discloses a CNN denoising method based on parallel feature extraction. The CNN denoising method comprises the six steps of 1, building a CNN denoising network model for parallel featureextraction; Step 2, initializing training parameters of the CNN denoising network model; Step 3, constructing a training set; 4, designing a loss function, and training a CNN denoising network model by taking a minimum loss function as a target to obtain a CNN denoising model; 5, taking the noise image as the input of a CNN denoising model, wherein the output of the noise image is the noise information learned by the network model; and 6, subtracting the noise information learned in the step 5 from the noise image to obtain a denoised clean image. According to the method, the noise can be completely removed, the texture information of the image can be well reserved, and the objective indexes PSNR and SSIM are remarkably improved.

The invention provides a watermark protection method for an MP3 file, belonging to the technical field of multimedia signal processing. The method comprises a watermark embedding process in which watermark data is embedded into each audio frame according to a frame structure model fixed by the MP3 file, wherein the embedding of watermark is realized by directly modifying the compression domain data of the MP3 file. The invention has the advantages that: 1) the algorithm has simple principle and wide applicability; 2) the computational complexity of the algorithm is low, no decoding is needed, and the algorithm can be realized through directly modifying code stream; 3) nearly no distortion of hearing is caused; 4) the file size is not changed when being to the accuracy of bit level, and the imperceptibility of watermark is strong; and 5) the algorithm standard is uniform, the technology is mature, and the versatility is strong.

The invention provides a display panel. The display panel includes an array substrate and a colorful filter substrate; the colorful filter substrate comprises color resistors and a black matrix; an extension area is arranged between the periphery of each color resistor and the black matrix, and is internally provided with first insulating electrodes made of conductive materials; the array substrate comprises pixel electrodes corresponding to the color resistors in a one-to-one mode, the outer circumference of each pixel electrode is provided with a circle of second insulating electrodes opposite to the first insulating electrodes in position, and the second insulating electrodes are not in contact with the pixel electrodes; the voltage applied on the first insulating electrodes is equal tothat applied on the second insulating electrodes. The invention further provides a manufacturing method of the display panel. Compared with the prior art, the occurrence of aligning dark fringes at the edges of the pixel electrodes is reduced.

The invention discloses a broadband Lora communication terminal antenna, comprising: an MCU microprocessing unit, transmitting transmission information to a Lora transceiver, converting the received transmission information into a modulated radio frequency signal, transmitting the radio frequency signal to a radio frequency switch through a transmission channel, and radiating the radio frequency signal to a space through the antenna; the transmitting channel that comprises a transmitting radio frequency matching circuit and a transmitting antenna matching circuit which are connected in turn; and the radio frequency switch that switches and connects the radio frequency switch circuit to the receiving channel or the transmitting channel. The MCU micro-processing unit communicatively connectswith the radio frequency switch, and controls the radio frequency switch to switch to the transmitting channel, so that the radio frequency switch circuit is connected with the transmitting antenna matching circuit. The invention has the advantages of greatly improving the antenna efficiency in the radio frequency link of the existing Lora communication terminal and improving the communication coverage range, and can be widely applied to the technical field of the antenna of the Lora communication terminal in a wide frequency band.

The invention discloses a heat dissipation structure of an LED lamp, which comprises a lampshade of the LED lamp. A heat dissipation aluminum plate is plugged into the lampshade. The middle part of the heat dissipation aluminum plate is punched and formed with an upwardly protruding round platform. The heat dissipation aluminum plate around the round platform is stamped and formed with several lines The upwardly protruding heat dissipation channel communicates with the inner cavity of the round platform. The side wall of the lampshade is formed with a heat dissipation hole that communicates with the heat dissipation channel on the heat dissipation aluminum plate. The bottom surface of the heat dissipation aluminum plate between adjacent heat dissipation channels is against a pad The screw passes through the heat-dissipating aluminum plate and is screwed on the pad, the pad is fixed on the baffle, the baffle is plugged and fixed in the lampshade, a conduit is inserted on the baffle, and the upper end of the conduit is fixed on the bottom surface of the round table On the top, the round table is formed with wire via holes, the top surface of the round table is fixed with a PCB board, and the LED lamp chip is fixed on the PCB board. The invention only optimizes and improves the heat dissipation structure of the LED lamp, and improves the heat dissipation efficiency of the LED lamp without changing the size of the LED lamp.

The invention belongs to illumination equipment, and relates to a secondary light distribution lens for a stage illumination lamp, wherein the stage illumination lamp mainly comprises a light source, a focusing lens and a light distribution lens. A light source is a high-power LED array light source with an aperture of 32.8mm; the focusing lens uses a large-tooth-groove glass Fresnel lens; a lens with a secondary light distribution function is formed by gluing a large-aperture parallel flat plate and a small-aperture plano-convex lens, located between the light source and the Fresnel lens, and used for changing the propagation direction of a light ray and playing a secondary light distribution role; the centre illumination intensity of a light spot can be increased by about 10% in case of no increase for the radius of the light spot by using the secondary light distribution lens. The light distribution lens is plated with a broadband antireflection film with a wavelength of 400-800nm, thus guaranteeing no significant changes of the colour temperature of the illumination lamp after using the secondary light distribution lens.

The invention discloses an ultrathin flexible vapor chamber and a manufacturing method. The ultrathin flexible vapor chamber comprises an upper shell plate, an upper shell plate liquid absorption core, a flexible supporting plate, a lower shell plate liquid absorption core and a lower shell plate which are sequentially arranged in an attached mode, the upper shell plate is provided with a first fold structure, and the lower shell plate is provided with a second fold structure, the first fold structure corresponds to the second fold structure in position, the upper shell plate and the lower shell plate are both of a pit structure, the upper shell plate and the lower shell plate are attached to form a closed cavity, the flexible supporting plate is a fold plate, and holes are formed in the flexible supporting plate. The ultrathin flexible vapor chamber has the advantages of being thin in thickness, capable of being flexibly installed, high in heat dissipation capacity and the like, and is an ideal choice for heat dissipation of flexible and curved-surface electronic elements.

The invention discloses a micro-interval steel mesh template electric polishing technology. The micro-interval steel mesh template electric polishing technology comprises the steps that firstly, marking point packaging is conducted; secondly, tool clamp assembling is conducted; thirdly, deburring is conducted; fourthly, polishing is conducted; fifthly, passivation is conducted; and seventhly, final checking is conducted. The micro-interval steel mesh template electric polishing technology has the beneficial effects that the micro-interval steel mesh template electric polishing technology is provided, the hole wall burr point discharge and rapid dissolving principle is utilized, steel mesh template via hole wall burrs are sufficiently removed, sawteeth are flattened through cutting, and theeffect of smooth hole walls is achieved; and meanwhile, the hole size and the template thickness are not changed, printed solder paste is round and smooth, and the machining precision is improved while the machining difficulty is lowered.

The invention discloses a deep vertical shaft wall image denoising method. The method comprises the following five steps: step 1, constructing a denoising model; 2, designing a loss function; 3, training a denoising model by using the standard image to obtain model parameters; 4, training and testing the denoising model by using an actual image, and correcting model parameters to obtain an ELU-CNNdenoising model; 5, inputting the noisy well wall image into the ELU-CNN denoising model to obtain a denoising result. The denoising model has 28 deep layers and comprises five feature extraction modules FEM and a jump link, and the jump link serially fuses the output features of the first convolution layer and the output features of each FEM, so that the low-level features extracted by the firstlayer are continuously utilized, and the sufficient extraction of the image features is ensured. When the blind noise of the well wall image is removed, the texture features of the damaged part of the well wall can be well reserved.

The invention relates to an article for daily use, namely an effect-enhancing and energy-saving frame of a cooking cover. The effect-enhancing and energy-saving frame is characterized in that a bracket (1) can be arranged on a cover head (6), and is connected with a plurality of vertical guide rods (2); and when the bracket (2) is arranged on the cover head (6), the lower ends of the guide rods (2) are close to the cover head (6), and the upper ends thereof can be jointed with the bottom part of a heated container (7). As the plurality of guide rods are arranged between the cover head and a container, under the premise that the gap of the container and the cover head is not changed, the container is connected with the cover head; under the premise that the size of the container and the cover head is not changed, the heated area of the container is increased, the heat-absorbing and heat-storing capabilities of the container are improved, therefore, the heat efficiency of fuel is obviously improved and the energy-saving and time-saving effects are achieved; in addition, the effect-enhancing and energy-saving frame of the cooking cover is characterized by simple structure, low manufacturing cost and convenient use and the like and is a revolutionary improvement for the traditional cooking cover.

The invention discloses an electric quantitative-opening separated-control push and pull preventing device and a material cabinet. According to the electric quantitative-opening separated-control pushand pull preventing device and the material cabinet, a front fixing bracket, a rear fixing bracket, a motor bracket, a device box, an electric pushing rod, a positioning sensor and row partition plates are included; the rear fixing bracket is connected with an electric suction cup through a first ball-catch, a second ball-catch, a first rubber-wrapped bearing and a second rubber-wrapped bearing;the device box is connected with a cover plate and electromagnetic locks through a third ball-catch, a fourth ball-catch, a third rubber-wrapped bearing and a fourth rubber-wrapped bearing; the devicebox is further provided with three sections of sliding rails, the cover plate is arranged on the lower portion of the front fixing bracket, and the three sections of sliding rails are used for connecting a cabinet body with the device box; and the rear fixing bracket is provided with a limiting switch, the electric pushing rod and the positioning sensor.