43results about How to "Guaranteed curvature" patented technology

The invention discloses an impact-resistant polypropylene composite which comprises the following components in parts by weight: 100 parts of polypropylene, 15-25 parts of rubber, 5-10 parts of polyamic acid, 20-35 parts of inorganic filler, 1-3 parts of compatilizer, 0.5-2 parts of antioxygen, 0-1 part of antistatic agent, and 0.1-3 parts of fire retardant. According to the impact-resistant polypropylene composite, the rubber is added to raw polypropylene for modifying polypropylene, and the inorganic filler is added to the components considering that the rubber can obviously reduce flexural modulus, heat resistance and other properties of the composite, so that the prepared composite is good in impact resistance, the curvature and the heat resistance of the composite are ensured, and the composite is easy to form and process, and good in mechanical property, and can be widely applied to the field of automobiles.

The invention relates to the field of multimedia information processing, and specifically to a video subtitle thinning method based on template matching and curve fitting. According to the video subtitle thinning method, taking structural features of Chinese characters into consideration, strokes of Chinese characters are extracted and redrawn, thereby achieving an effect of thinning the Chinese characters, and solving the problems of stroke distortion and loss and low recognition rate which are generated when other thinning algorithms are used to perform thinning on the objects of the class. The technical points of the video subtitle thinning method in the invention includes: obtaining Chinese character images in video subtitles; determining connected regions of the Chinese character images; proposing a template matching method to extract strokes of Chinese characters in the same connected region; and proposing a method of redrawing horizontal strokes and vertical strokes with horizontal and vertical line segments, redrawing left-falling strokes and right-falling strokes with secondary Bezier curves, and redrawing dot strokes with oblique line segments, thereby realizing a thinning effect of the Chinese character images. The video subtitle thinning method based on template matching and curve fitting in the invention keeps the shapes and the stroke structures of the Chinese characters, thereby preventing a distortion phenomenon; ensures flatness of horizontal strokes, straightness of vertical strokes and bending of left-falling and right-falling strokes, thereby better redrawing the shapes of the Chinese characters; and improves a recognition effect of the video subtitles.

The invention provides a preparation method for a super-lens with a plane-shaped imaging surface by using a secondary ion beam etching technology. The preparation method mainly comprises the following steps of: etching a semi-cylindrical groove by utilizing IBE (Ion Beam Etching) to obtain a circular-arc-shaped curve groove which has the same curvature radius as the semi-cylindrical groove and has a reduced diameter depth; then depositing a plurality of films in the circular-arc-shaped curve groove; and then, etching the plurality of films by utilizing the IBE to obtain the super-lens with the plane-shaped imaging surface. The preparation method can manufacture the plane-shaped super-lens without preparing a thin film with non-uniform thickness, and can obtain the circular-arc-shaped curve groove which has the same curvature as the semi-cylindrical groove and has the random diameter depth; the plurality of films with uniform thickness are deposited on the circular-arc-shaped curve groove and then the super-lens with the plane-shaped imaging surface is prepared on the circular-arc-shaped curve groove through the IBE etching technology. The preparation method only needs to adopt the conventional ion beam etching technology, a thin film depositing technology and a reaction ion etching technology to obtain the circular-arc-shaped curve groove which has the same curvature as the semi-cylindrical groove and has the random diameter depth, and the super-lens with the plane-shaped imaging surface can be prepared on the base.

The invention relates to a method for constructing a hyperbolic curve funnel wall of a tamping coke coaling tower, which comprises the following steps: (1) manufacturing and pre-installing a template for forming the hyperbolic curve funnel wall; (2) calculating a reinforcing steel bar support frame of a template of an external wall of the hyperbolic curve funnel wall, wherein the distance X between the external wall of the hyperbolic curve funnel wall and the coal tower vertical wall is equal to (d/2)*e<kcy/2> when the highness is increased by 500mm each time; (3) manufacturing the reinforcing steel bar support frame, wherein the reinforcing steel bar support frame is made of phi 25 twisted steel, and the gradient of the reinforcing steel bar support frame is the same as the gradient of the external wall of the hyperbolic curve funnel wall when the highness is increased by 500mm each time; (4) installing and fixing a template of an internal wall and the template of the external wall; (5) pouring and casting concrete; and (6) removing the templates and maintaining. The method provided by the invention is simple and easy, the curvature of the external wall of the hyperbolic curve funnel wall can be effectively ensured, the construction speed is improved, the construction quality is guaranteed, and the invention provides the safe and reliable method for constructing the hyperbolic curve funnel wall of the tamping coke coaling tower.

The invention discloses a method for preparing PCB (Printed Circuit Board) aluminum foils by using cast-rolled slabs. The method comprises the following steps: (1) smelting, casting and rolling 1050 or 1060 aluminum alloys; (2) roughly rolling, intermediately rolling, longitudinally shearing edges; (3) finely rolling; (4) washing and straightening; (5) cutting, checking and packing to obtain PCB electronic aluminum foils. The mechanical property control deltab of PCB electronic aluminum foils prepared by the method is 190-230MPa; the extension ratio of the PCB electronic aluminum foils is larger than or equal to 2%; the surface hardness value is smaller than 60HV.

The invention provides a pre-buried channel arc bending machine and relates to the structures of arc bending machines. The pre-buried channel arc bending machine comprises a workbench connected with a drive assembly, a first forming assembly, a second forming assembly, a high-speed rotary saw and a discharging supporting assembly. The drive assembly is arranged at the feeding portion of the workbench and comprises drive rolls perpendicularly arranged on the tabletop of the workbench. The first forming assembly is arranged on the discharging side of the drive assembly and comprises multiple pairs of first forming rolls perpendicularly supported on the tabletop of the workbench. The second forming assembly is arranged on the discharging side of the first forming assembly and comprises multiple pairs of second forming rolls perpendicularly supported on the tabletop of the workbench. The discharging supporting assembly is arranged on the discharging side of the second forming assembly and comprises multiple carrier rolls arranged parallel to the tabletop of the workbench. The high-speed rotary saw is arranged on the feeding side of the discharging supporting assembly. By the adoption of the pre-buried channel arc bending machine, raw materials are saved, and the curvature and the quality of a pre-buried channel are stable.

Steps for installing iron yoke into iron core stem are as following: inserting T type rack into iron core stem; inserting piece of up iron yoke into iron core stem; picking up T type rack; fastening yoke to complete assembling. Advantages of the method are: simple technique, easy of operation, safe and reliable. The method is especially suitable to assembling up iron yoke on transformer in large capacity.

The invention discloses a method for detecting the quality of a check ring based on machine vision. The method comprises the steps of S1, collecting an image of the check ring, and converting the image into a binary image; S2, performing edge detection on the binary image of the check ring; and S3, calculating the curvature of edge points along the edge. According to the scheme of the invention, automatic detection and recognition for the check ring are achieved through a series of operation processes such as image acquisition and image processing and recognition, and the process does not needmanual participation. Meanwhile, an edge curve of the image of the check ring is found out through curve fitting, and the curvature of all edge points of the check ring is calculated according to theedge curve, so that omnidirectional check ring curvature detection is achieved, and the curvature of the check ring in all directions is ensured to meet quality detection requirements.

The invention discloses a fixator for artery puncture. The fixator for the artery puncture comprises a long support pad and bandages arranged on the support pad. An inclined plane used for upward supporting the arm of a patient, a protruding portion used for supporting the wrist to keep crooked and a concave portion used for the placement of the palm and the fingers of the patient are arranged on the upper end face of the support pad from rear to front in sequence. The inclined angle between the inclined plane of the support pad and the horizontal plane ranges from 25 to 30 degrees. The inclined angle between the rear side face and the front side face of the protruding portion ranges from 55 to 65 degrees. The front portion and the rear portion of the support pad are both provided with a bandage. Compared with the prior art, the fixator for the artery puncture can solve the problems that existing artery puncture cannot fix the arm and the wrist of the patient effectively, the success rate of the artery puncture is influenced, and the manpower of medical workers is imposed.

The invention discloses a method for making suit sleeves. The method is characterized by including the steps of 1), drawing a sleeve cap curve line of a top sleeve body; 2), drawing a sleeve valley curve line of an under sleeve body; 3), drawing front bending joints of the top sleeve body and the under sleeve body by determining partial sleeve points of cuffs of the top sleeve body and the under sleeve body; 4), determining the length of the sleeve bodies; 5), determining back bending joints of the top sleeve body and the under sleeve body; 6), determining hemlines of the cuffs to complete thesleeves. The hemlines are concealed in position, which is reasonable in processing; the curve lines M1T and the rear bending joints are intersected at the T-point, included angles on two sides are favorably close to 90 degrees, cuff vents are configured, and the sleeves are completed. The method is convenient and simple in processing and high in efficiency.

The invention belongs to the technical field of optical communication, and particularly relates to a tail fiber fixing clamp of a light emitting sub-module. The tail fiber fixing clamp comprises a fixing clamp body, wherein a first adapter groove and a tail fiber groove are formed in the top surface of the fixing clamp body, and a crystal head placing table is arranged on the side surface of the fixing clamp body; one end of the tail fiber groove is communicated with the first adapter groove, and the other end extends to the side surface; and the tail fiber groove is bent. The invention further provides a tail fiber fixing method which comprises the following steps of assembling an adapter with a tail fiber on the tail fiber fixing clamp, then, inversely buckling the whole tail fiber fixing clamp on the module shell, so that the crystal head and the adapter are respectively aligned with the crystal head groove and a second adapter groove on the module shell, baking the crystal head and the adapter together to cure glue after pressing, and finally, removing the tail fiber fixing clamp. The tail fiber fixing clamp can automatically adapt to the length of the tail fiber, guarantees that the tail fiber maintains a fixed bending degree after being assembled so as to absorb the tensile force borne by the tail fiber in the using process, can also guarantee that the optical fiber is not excessively bent, and prevents the optical power from falling off due to excessive bending.

The invention provides a method for preventing a rolled hot steel billet from bending. The method is characterized in that the temperature is kept at 1250+/-10 DEG C during heating and rolling steel ingots; the interval of the steel ingots in a soaking furnace is 1300-1800mm; the steel flattening pass reduction is controlled to be 0-10 mm; the steel billets are stacked in a shape like the Chinesecharacter 'jing', and the shape of a steel billet stack is a cube. According to the method for preventing the rolled hot steel billet from bending, by optimizing the steel billet from the links of heating, rolling, stacking, cooling and the like, it is ensured that on the basis without a straightening device, the curvature of the rolled steel billet is controlled to be within 3 mm/m, and the problem that large curvature causes a low production efficiency and prolongs delivery time is solved.