30results about How to "Guaranteed Distortion" patented technology

The invention belongs to the field of a heat treatment process for reciprocating-compressor 2Cr13 piston-rods, and is applicable to all reciprocating compressors adopting a 2Cr13 piston-rod heat treatment process and mechanical equipment which requires high toughness and needs post-order surface heat treatment. The process can solve the problem that the prior heat treatment adopted for 2Cr13 piston rods is low in impact toughness, large in high-frequency quenching deformation of long-axis parts, large in hardening cracks and workpiece residual stress, and the like. The process comprises the forging molding of 2Cr13 piston rods, annealing, quenching-tempering, stabilizing, medium-frequency or high-frequency quenching and low-temperature tempering. The 2Cr13 heat treatment process can completely overcome the disadvantages of the prior heat treatment process such as incapability of eliminating residual stress and serious high-frequency quenching workpiece distortion, and is an ideal heat treatment process for long-axis workpieces.

The invention discloses a backlight control method. The backlight control method comprises the following steps of acquiring the maximal gray value of each area in the current video image and the ambient brightness value of the current environment; acquiring the average gray value of each area; determining the weighted values of the maximal gray value, the average gray value and the ambient brightness value, and calculating first weighted average values of the maximal gray value, the average gray value and the ambient brightness value; determining a backlight adjustment value of each area basedon the first weighted average values; and sending the backlight adjustment value to a backlight control circuit, so that the backlight value of each area is regulated. The invention further disclosesa backlight control device and a computer readable storage medium. According to the technical scheme of the invention, the first weighted average values of the maximal gray value and the average grayvalue of each area and the ambient brightness value are calculated, thus the backlight adjustment value is determined, the backlight crosstalk of the close regions and the influences of ambient lightduring backlight adjustment are reduced, and the adjusting effect of backlight brightness is enhanced.

The invention discloses a method and a device for adapting a horizontal screen display terminal to a vertical screen application program and the terminal, relates to the technical field of computers, and can adapt the display content of the vertical screen application program to a horizontal display screen, so that a user can obtain better use experience. The method comprises the following steps: setting a fixed display direction of a horizontal screen window on a system level; obtaining an optimal display size of the vertical screen application program in the vertical screen window, and obtaining a matching display size of the vertical screen application program in the horizontal screen window after display logic adjustment; adjusting the screen display density of the horizontal screen window to enable the display proportion of the vertical screen application program in the horizontal screen window to be consistent with the display proportion of the vertical screen application program in the vertical screen window; and based on the adjusted screen display density, putting the display content of the vertical screen application program in the horizontal screen window according to the matched display size. The device and the terminal are applied to the method in the scheme.

The invention discloses an adaptation method and device for display of a web application. The adaptation method for display of the web application comprises the following steps that a virtual window used for displaying a Web page is established on a mobile terminal, and the width resolution ratio of the virtual window is set to be a fixed value; a picture is loaded, the width resolution ratio of the picture is set to be the same as that of the virtual window, and the equal-proportion zooming is conducted on the picture till the width of the image is the same as that of the virtual window; the picture is set to be the background and is displayed in the virtual window. According to the adaptation method for display of the web application, the virtual window with the width resolution ratio being the fixed value is established in the mobile terminal to be used for displaying the Web page, in this way, it is guaranteed that the Web page in the web application of the mobile terminal is displayed consistently, and deformation of the page is avoided; the picture is loaded, the width resolution ratio of the loaded picture is set to be the same as that of the virtual window, the width of the loaded picture is the same as that of the virtual window, then the picture is set to be the background to be displayed, and thus it is guaranteed that distortion does not occur during displaying and user experience is not affected.

The invention relates to a long-wave infrared mechanical passive type athermalized lens. An optical system of the lens sequentially includes, along the incident direction of light from left to right, a lens group front group A with negative focal power and a lens group rear group B with positive focal power. The front group A comprises a crescent lens A-1. The rear group B comprises a concave crescent lens B-1 and a crescent lens B-2 in sequence from left to right. The long-wave infrared mechanical passive type athermalized lens has the advantages of relative large aperture, IP67 waterproof and dustproof performance, low distortion, athermalized compensation, etc. Through the characteristic that material expends with heat and contracts with cold and also through applications of compensation elastic pieces, an athermalizized design structure is simpler, the structure of an entire product is smaller and lighter, the steady imaging of an optical axis is clearer and high in reliability, the requirement of users for the imaging performance of products is met, and the lens is more convenient to use by users in terms of structure.

A single-phase five-level power factor correction circuit based on a hybrid H bridge comprises switching tubes Q1, Q2 and Q3. One side of an alternating-current power supply Vs is connected with an anode of a diode D1 and a cathode of a diode D2, and a connection node forms an end point b. The other side of the alternating-current power supply Vs is connected with one end of an inductor L, the other end of the inductor L is connected with the anode of a diode D3 and the cathode of a diode D4, and connection nodes form an end point a. The drain electrode of the switching tube Q3 is connected with the cathode of the diode D1, the cathode of the diode D3, the anode of the diode D7, the drain electrode of the switching tube Q1 and a connection node to form an end point c. The source electrodeof the switching tube Q3 is connected with the anode of a diode D2, the anode of a diode D4, the cathode of a diode D8 and the source electrode of a switching tube Q2, and the connection node forms anend point d. The source of the switching tube Q2 is connected with the drain of the switching tube Q1, and the connection node forms an end point n. The cathode of the diode D7 is connected with oneend of the capacitor C1, and a connection node forms an end point p. The negative electrode of the capacitor C2 is connected with the anode of the diode D8 and the connection node forms an end point m. And the endpoint a, the endpoint c, the endpoint d and the endpoint n form four ports of the hybrid H-bridge network structure. The circuit structure has the advantages of low cost, high reliability, simple control system design and the like.

The invention relates to a distributed transmission method for a ubiquitous-mobile-network-based emergency communication system. In the method, a local emergency command center performs scheduling according to resource sensing information transmitted back by a plurality of emergency communication terminals accessing a ubiquitous network on an emergency communication scene, and the emergency communication terminals are aggregated at the remote emergency command center after transmitting own data packets according to scheduling information to realize the distributed transmission of an emergency communication scene video stream. By the method, the high-speed and real-time information transmission of the emergency communication scene can be ensured under the conditions of large commercial network user number and heavy load on the emergency communication scene.

The invention discloses a distortion correction algorithm for an optical system of an all-view 3D measuring instrument. The algorithm comprises the steps as follows: 1, establishment of a distortion relation: constructing a mapping relation between coordinates of a standard image and coordinates of a distortion image and generating a distortion correction coefficient file or a distortion correction form file; 2, correction of the distortion image: correcting the input distortion image by using the generated distortion correction coefficient file or a distortion correction form file to obtain a corrected standard image finally. With the adoption of the algorithm, stereo measurement errors caused by image distortion because of optical lens manufacturing and adjustment errors can be effectively reduced, the angle measuring accuracy of the system is greatly improved, and the problem that measurement errors are produced due to the fact that lens distortion reduces geometric position accuracy of objects in images is solved.

The invention belongs to the field of a miniaturized loudspeaker and specifically discloses a suspension type elastic diaphragm for a miniaturized loudspeaker. The suspension type elastic diaphragm comprises an annular support for installing on the end surface of a loudspeaker vibrating diaphragm, multiple elastic arms and a flexible plate. A suspension frame and an attachment frame are connected through at least two suspension arms; each elastic arm is distributed between the annular support and the flexible plate; one end of each elastic arm is connected with the inner side wall surface of the annular support; the other end of each elastic arm is connected with the outer side wall surface of the flexible plate; the inner wall of the flexible plate is provided with two flanges arranged to be opposite to each other; the annular support and the elastic arms are provided with conductive parts; the conductive parts extend to the flanges on two of the elastic arms; and the positions of the conductive parts on other elastic arms extend to the connection position of the elastic arms and the flexible plate. The suspension type elastic diaphragm has the following advantages: while transmission of electric signals is ensured, the phenomenon of a fracture caused by a voice coil can be avoided at the same time, and while the weight of a vibration system is reduced, unevenness caused by vibration can be prevented, such that product distortion is effectively guaranteed.

The invention relates to a far-infrared long-wave far-shot and high-fog-permeability athermal lens and a manufacturing method thereof. The athermal lens comprises an optical system. The optical system comprises a front group of lenses and a rear group of lenses which are sequentially arranged along the incident direction of light rays. The focal power of the front group of lenses and the focal power of the rear group of lenses are both positive. The front group of lenses and the rear group of lenses are crescent-shaped lenses. The athermal lens is simple in structure and convenient to use.

The invention discloses a backlight control method, and the method comprises the following steps: obtaining all pixels of each region of an image; calculating a first backlight value based on the pixels, and carrying out the threshold limiting of the first backlight value, so as to obtain a second backlight value limited by a threshold value and a third backlight value which is not limited; transmitting the second backlight value a backlight control circuit, carrying out the backlight compensation for the image based on the third backlight value, and transmitting the image to a liquid crystaldisplay screen after compensation. The invention also discloses a backlight control device and a computer readable storage medium. The method achieves the calculation of the backlight value for the backlight compensation of the image, and achieves the adjustment of the liquid crystal grids of the liquid crystal display screen, thereby improving the contrast, achieving the good restoration of the image, and guaranteeing the distortion of the image. Moreover, the method is simple.

The invention discloses a vocal intelligent recognition touch switch, which comprises a speech acquisition module for collecting speech signals, a filtering module for filtering the collected speech signals, a database module for storing standard speech commands, a speech identification module for comparing the speech signals with the standard speech commands in the database module, and an execution module for executing the corresponding command according to the recognition result of the speech recognition module. The vocal intelligent recognition touch switch and the control method thereof can improve the deficiencies of the prior art and improve the accuracy of human voice recognition.

The invention discloses a video redirection quality evaluation method based on space-time saliency classification and fusion. The method comprises the following steps: constructing a video classification model according to space-time saliency of videos, and dividing the videos into four classes according to motion information and foreground information of original videos; extracting salient information, edge features, foreground information, motion features and the like of the original video, and evaluating the quality of the redirected video by adopting four spatio-temporal indexes, namely perceptual geometric distortion, edge group similarity, time continuity similarity distortion and important target time distortion; adopting different self-adaptive weight endowing methods for different types of videos, and fusing the quality scores of the four spatio-temporal indexes to obtain the overall objective quality of the redirected video. An index weight adaptive fusion mode is adopted for the classified videos, different space-time characteristics are extracted for different types of videos, different index weight adaptive fusion methods are adopted, the characteristics of the videos are fully considered, and the performance of an objective evaluation algorithm is greatly ensured.

The invention discloses an immersion type high-resolution small-caliber optical fiber microscope objective, which belongs to the technical field of optical lenses. The microscope objective comprises afirst lens element, a second lens element, a third lens element and a fourth lens element which are sequentially arranged from an object plane to an image plane; the first lens element is a sphericalpositive lens; the second lens element is a spherical doublet lens and comprises a first lens and a second lens which are arranged in sequence, and the first lens is a negative lens; the second lensis a positive lens; the third lens element is a negative lens; the fourth lens element is a positive lens; the focal length of each lens element satisfies the following relational expression: 0.6 < f1 / f < 0.9, -3.1 < f21 / f < -1.3, 0.512 < f22 / f < 1.892, 1.49 < f2 / f < 2.5, -3.6 < f3 / f < -2.4, and 0.5 < f4 / f < 0.7. The objective of the invention is to solve the technical problems that the optical aperture of a conventional optical fiber microscope objective is not small enough, and small distortion cannot be realized while the imaging quality is ensured.

The invention relates to an improved V-PCC inter-frame prediction method based on registration. The method comprises the following steps: S1, segmenting a point cloud of a current frame based on a binary tree coarse segmentation algorithm of motion consistency, calculating the distance from the center of mass of the point cloud in a block to an original point, carrying out the sequential sorting according to the size of the distance, and giving the index information to a corresponding block; s2, carrying out three-dimensional registration inter-frame prediction on the segmented blocks, calculating errors, and carrying out direct entropy coding on block indexes and motion information of the blocks with the errors smaller than a certain threshold value; and for the blocks of which the errors are greater than a threshold value, fusing and using inter-frame estimation of V-PCC, and finally forming a bit stream. According to the invention, the coding performance of the V-PCC is effectively improved.

The invention discloses a thermoprinting and stitching method for a bedsheet. The bedsheet comprises a bed surface, a lower hem and shield cloth which are stitched by the following steps: 1, preparingfor the bed surface, the lower hem and the shield cloth; 2, thermoprinting the bed surface; 3, preparing for a rolling rope; 4, stitching the bed surface and the rolling rope; and 5, simultaneously stitching the lower hem and the shield cloth with the rolling rope. Due to the addition of the rolling rope, the sizing effect obtained after the bedsheet is stitched is improved firstly, and wrinklesof the bed surface are reduced; secondly, the bed surface and the rolling rope are stitched, the lower hem is stitched with the shield cloth and the rolling rope, and then, the stitching of the bed surface, the lower hem and the shield cloth is realized; while the bed surface, the lower hem and the rolling rope are stitched again, so that the secondary stitching and connection of the bed surface,the lower hem and the shield cloth is realized, and the stitching strength is improved; and meanwhile, due to the structural arrangement of an ironing sticker, the distortion and deformation of an image layer in a thermoprinting process can be better guaranteed, and the thermoprinting quality can be improved.

The invention relates to a long-wave infrared optical-mechanical athermal lens. The optical system of the lens is sequentially provided with a front group A of a lens group with a negative focal power and a rear group B of a lens group with a positive refractive power along the incident direction of light from left to right. The long-wave infrared optical mechanical athermalization lens has the advantages of large relative aperture, IP67 waterproof and dustproof, low distortion, and athermalization compensation. Through the design of mechanical athermalization, and the use of thermal expansion and contraction characteristics of materials and the application of compensation shrapnel, the athermalization design structure is simpler, and the overall product structure is smaller and clearer. In terms of meeting the user's requirements for product imaging performance, the structure is also more convenient for customers to use.

The invention discloses a liquid-immersion type high-resolution small-diameter optical fiber microscope objective lens, which belongs to the technical field of optical lenses, and comprises a first lens element, a second lens element, a third lens element, The fourth lens element; the first lens element is a spherical positive lens; the second lens element is a spherical doublet lens, including a first lens and a second lens arranged in sequence, the first lens is a negative lens; the second lens is a positive lens; the third lens element is a negative lens; the fourth lens element is a positive lens; and the focal length of each lens element satisfies the following relationship: 0.6

The invention relates to a long-wave infrared mechanically passive athermal lens. The optical system of the lens is sequentially provided with a lens group A with a negative focal power and a lens with a positive focal power along the incident direction of light from left to right. In the rear group B, the front group A includes crescent-shaped lenses A-1 sequentially arranged from left to right; the rear group B includes negative crescent-shaped lenses B-1 and crescent-shaped lenses B-2. The long-wave infrared mechanical passive athermal lens has the advantages of large relative aperture, IP67 waterproof and dustproof, low distortion, and athermal compensation; the use of thermal expansion and contraction characteristics of materials and the application of compensation shrapnel makes the athermal design structure more efficient. Simple, the structure of the overall product is smaller, the weight is lighter, the optical axis is stable, the image is clearer, and the reliability is high. In terms of meeting the user's requirements for product imaging performance, the structure is also more convenient for customers to use.

The invention relates to a transmission system of a nuclear power plant direct-current power system. The transmission system comprises a first signal circuit set and a second signal circuit set of the nuclear power plant direct-current power system, a first nuclear safety load circuit set, a first non-nuclear safety load circuit set, a second nuclear safety load circuit set, a second non-nuclear safety load circuit set, a first signal transmitter, a second signal transmitter, a first signal isolator, a second signal isolator, a field instrument and a working power supply signal circuit set. With the system, electric signal isolation can be implemented on field instrument equipment or channels prone to insulation deterioration with other equipment or electric circuits in good condition effectively to have insulation fault coverage effectively isolated and prevent the insulation condition from transmitting in the whole channel circuit.

The invention discloses an image mosaic method based on regular boundary constraints, including: S1 initial mosaic of images; S2 extraction of irregular boundaries of panoramas; S3 establishment of regular boundaries based on segmented rectangles; S4 establishment of segmented rectangles based on boundary constraints Image stitching. This method defines regular boundaries according to the content and shape features of the panorama, and realizes image stitching based on regular boundaries through global energy optimization.

Single-phase five-level power factor correction circuit based on hybrid H-bridge, including switching tube Q 1 , Q 2 , Q 3 , one side of the AC power supply Vs is respectively connected to the diode D 1 anode, diode D 2 Cathode, the connection node constitutes terminal b; the other side of the AC power supply Vs is connected to one end of the inductor L, and the other end of the inductor L is connected to the diode D 3 anode, diode D 4 Cathode, connecting nodes to form terminal a; switching tube Q 3 The drains are connected to the diode D 1 cathode, diode D 3 cathode, diode D 7 Anode, switching tube Q 1 Drain, the connection node constitutes the terminal c; the switch tube Q 3 The source is connected to the diode D respectively 2 anode, diode D 4 anode, diode D 8 Cathode, switching tube Q 2 The source, the connection node constitutes the terminal d; the switch tube Q 2 The drain is connected to the switch Q 1 source, whose connection node constitutes terminal n; diode D 7 Cathode connection capacitance C 1 One end, the connecting node constitutes the terminal p; the capacitance C 2 The cathode is connected to the diode D 8 Anodes, the nodes of which are connected constitute terminal m. The invention has the advantages of low cost, high reliability, simple control system design and the like.

The invention relates to a power distribution terminal based detection method and system, and aims at providing the detection method and system needless of separating the three-phase voltage collecting input end from the system control power input end before detection. The detection method comprises that a signal command input from the external is received; the power of a received signal is amplified; and the processed signal is output. The integral power distribution terminal is detected, the method and device satisfy onsite application more, the practical condition of the voltage signal canbe detected more accurately during operation of the terminal, and the method and system are suitable for the power field.

The invention discloses a display adaptation method and device for a web page application. The method includes the following steps: creating a virtual window for displaying a web page on a mobile terminal, and setting the width resolution of the virtual window to a fixed value; Load the picture, set the width and resolution of the picture to be consistent with the width and resolution of the virtual window, and scale it proportionally until the width of the picture is consistent with the width of the virtual window; set the picture as the background to display in the virtual window. The method creates a virtual window with a fixed width and resolution in the mobile terminal to display the Web page, so as to ensure that the Web page is displayed consistently in the webpage application of the mobile terminal, and no page deformation occurs; the width resolution of the image is set by loading a picture The resolution is consistent with the width and resolution of the virtual window, and the width is consistent with the width of the virtual window, and then the picture is set as the background display, so as to ensure that the picture display process will not be deformed and distorted, which will affect the user experience.

The invention discloses a backlight control method, which includes the following steps: acquiring each pixel point in each area of ​​an image; calculating a first backlight value based on the pixel points, and performing a threshold limit on the first backlight value, so as to obtain Threshold-limited second backlight value and undefined third backlight value; sending the second backlight value to the backlight control circuit, performing backlight compensation on the image based on the third backlight value, and sending the backlight-compensated image to the LCD screen. The invention also discloses a backlight control device and a computer-readable storage medium. The present invention realizes the backlight compensation for the image by calculating the backlight value, and adjusts the liquid crystal cells of the liquid crystal display, thereby improving the contrast, and restoring the image well, ensuring the degree of distortion of the image, and the The algorithm is simple.