723 results about "Curve line" patented technology

A surgical method and apparatus for presbyopia correction removal of the sclera tissue are disclosed. Mechanisms based on sub-conjunctiva filled-in of the sclera area and cause the sclera-ciliary-body and zonule "complex" become more flexible (or less rigidity) are proposed. Total accommodation based a lens relaxation and lanes anterior shift is calculated and proposed as the guidance of the parameters for device design and clinical outcomes The preferred embodiments for the ablation patterns include radial lines, curved lines, ring dots or any non-specific shapes in a symmetric geometry. The surgery apparatus includes non-laser device of radio frequency wave, electrode device, bipolar device and plasma assisted device. Another preferred embodiment is to use post-operation medication such as pilocarpine (1%-10%) or medicines with similar nature which may cause ciliary body contraction for more stable and enhancement after the treatment.

A process and system to transform a digital photograph of a text document into a scan-quality image is disclosed. By extracting the document text from the image, and analyzing visual clues from the text, a grid is constructed over the image representing the distortions in the image. Transforming the image to straighten this grid removes distortions introduced by the camera image-capture process. Variations in lighting, the extraction of text line information, and the modeling of curved lines in the image may be corrected.

A tool main cutting edge extends rearward in a rotating direction as it approaches a rear end at the outer periphery. The main cutting edge is a convexly curved line protruding toward the outside of a rake face viewed from the top and another convexly curved line extending toward the seat face, convexly curving from one end of the main cutting edge to the other, viewed from the side. When mounted, an inclination angle defined by the rake face gradually decreases from one end toward the other, and a projection line of a rotation about a rotation axis of the tool forms a convex arc smoothly coming, at a middle portion of the main cutting edge, into contact with a cylindrical surface about the axis and gradually retreats inward from the cylindrical surface as it approaches both ends of the main cutting edge.

Laser and non-laser means to remove a portion of the ciliary body tissue for the treatment of presbyopia and glaucoma are disclosed. Mechanisms based on elasticity increase the sclera-ciliary-body and zonule “complex” is proposed. Total accommodation based a lens relaxation and lanes anterior shift is calculated. The preferred embodiments for the ablation patterns include radial lines, curved lines, ring dots or any non-specific shapes in a symmetric geometry. The surgery apparatus includes lasers in UV (0.19 to 0.35 micron) and IR (2.8 to 3.2) micron, and non-laser device of radio frequency wave, electrode device, bipolar device and plasma-assisted device. Post-operation medication such as pilocarpine (0.5%-5%) or medicines with similar to reduce postoperative regression or enhance the accommodation is presented. A much deeper, about (0.8-1.4) mm, ablation depth supraciliary body is proposed for (50%/-200%) greater accommodation than the prior arts based on superficial scleral ablation or expansion.

A display device and a driving method thereof in which if an input 2D/3D video signal is a 2D video signal, an image data signal is generated by applying a first gamma correction curved line. If the input 2D/3D video signal is a 3D video signal, an image data signal is generated by applying the second gamma correction curved line. Luminance of a maximum grayscale of the first gamma correction curved line is set to be lower than luminance of a maximum grayscale of the second gamma correction curved line. Therefore, it is possible to prevent luminance of the display device from deteriorating by a barrier in a 3D driving mode.

A method of forming a recess channel trench pattern for forming a recess channel transistor is provided. A mask layer is formed on a semiconductor substrate, which is then patterned to expose an active region and a portion of an adjacent device isolating layer with an isolated hole type pattern. Using this mask layer the semiconductor substrate and the device isolating layer portion are selectively and anisotropically etched, thereby forming a recess channel trench with an isolated hole type pattern. The mask layer may be patterned to be a curved line type. In this case, the once linear portion is curved to allow the device isolating layer portion exposed by the patterned mask layer to be spaced apart from an adjacent active region. The semiconductor substrate and the device isolating layer portion are then etched, thereby forming a recess channel trench with a curved line type pattern.

The invention provides a kinematics control method for complex-curved-surface five-axis numerical control machining cutter vectors, belongs to the field of complex-curved-surface five-axis numerical control machine took precise and efficient machining, and particularly relates to a kinematics control method of cutter shaft vectors in the complex-curved-surface five-axis numerical control machining process. According to the kinematics control method of the cutter vectors, on the basis that a complex-curved-surface parametric equation is determined, the function relationship between the cutter shaft vectors and machining track curved line parameters can be established. Then, a motion parameter calculation method for a five-axis numerical control machine tool rotating feed shaft is established, so an angular velocity calculation result and an angular acceleration calculation result of the rotating feed shaft can be obtained. Finally, smoothing is carried out on the cutter shaft vectors to ensure that the rotating feed shaft of the machine tool moves smoothly and achieve the kinematics control over the cutter shaft vectors. The kinematics control method for the complex-curved-surface five-axis numerical control machining cutter vectors is wide in application scope, effectively improves machining quality of a complex curved surface, and gives better play to the performance of the machine tool.

A light-emitting apparatus includes a light-emitting element, a base body, a reflection member and a fluorescent material layer. A cross section of the inner surface of the reflection member cut by a virtual plane including a virtual axis penetrating a center of the inner surface and perpendicular to the upper principal surface of the base body has a sectional profile defined by a curved line expressed by the following formula, and the inner surface of the reflection member is a curved surface obtained by rotating the curved line about the virtual axis: Z=(cr²)/[1+{1−(1+k)c²r²}^1/2] (where −10≦k≦−0.001, 0.001≦c≦10). An angle θ₁ which is made by an upper surface of the fluorescent material layer and a line which connects one corner of a light-emitting portion of the light emitting element with an uppermost position of the inner surface and is tangent to the one corner, is given as θ₁≧90°−sin⁻¹ (1/n₁)

A differential signal transmission cable has a pair of conductors arranged to be distant from each other and parallel to each other, an insulator covering the pair of conductors, and a shield conductor wound around the insulator. The insulator has an outer periphery shape of a transversal cross section in that a plurality of curved lines with different curvature radiuses are combined. The shield conductor has an inner periphery shape of a transversal cross section in that the plurality of curved lines are combined in accordance with the outer periphery shape of the insulator.

The invention refers to a driving device for hydroacoustic transmitters, including at least one actuating element (1), arranged to execute a reciprocating movement, wherein the movement of the actuating element (1) includes an increase and a decrease of the distance between two ends thereof, and at least one spring member (5, 27) which is connected to the actuating element (1) at said ends and which extends along a curved line between said ends, wherein the increase and the decrease of the distance between said ends result in a change of the curve of the spring member (5, 27) and thereby a movement of it. The device includes an element (12, 13, 28) for displacement of a mass, which displacement element (12, 13, 28) is connected to the spring member (5, 27) so that the movement of the latter is transmitted to the displacement element (12, 13, 28) and generates a displacement thereof, resulting in said mass displacement. Furthermore, the invention refers to the use of such a device for transmitting hydroacoustic waves in a liquid.

The present invention relates to a corrosion examination and non-destructive examination method for a metal pipeline. The instant electromagnetic technology (TEM) is used to examine the average thickness of the wall of the pipeline under the condition that no dig is performed, no corrosion-prevention layer is damaged and the normal running of the pipeline is not influenced. The method is characterized in that when other conditions are the same, the metal pipeline with different wall thicknesses can have obvious time divisibility on a normalized pulse instant-changing responding curved line. The wall thickness of the measured section of the pipe can be obtained by the indication of the known wall thickness and the method of inversing modeling. The present invention also relates to a corrosion examination and non-destructive examination systematic device for the metal pipeline. A virtual instrument is designed and produced with the TEM examination method for the wall thickness of the metal pipeline; a data collector adopts the instant-changing electromagnetic instrument; the control of the instruments, the data processing and the results expression are realized by the software of the computer, so that the expansion property of the instrument is strengthened, and the renewing speed is accelerated, and the complicate data processing analysis can be performed instantly. The device can be widely used for examining the corrosion of the anti-corrosion heat-preservation pipeline in the industries such as the petroleum industry, the petrochemical industry, the fuel gas industry, the electric power industry, the water supply industry, and the like.

The invention discloses a method for manufacturing a super-hard composite cutting blade. Firstly, carbide alloy or high-speed steel sheets prepared to be a base body of the cutting blade is cut into the needed size and shape. Secondly, the cutting tip portion is cut down, and the lateral surface of base body is manufactured with curve lines. Thirdly, the manufactured and formed base body of the cutting blade is placed inside a corresponding sintering mold, super-hard materials and composite powder are added into the missing cutting tip portion, and the super-hard materials and composite powder are transformed into super-hard polycrystalline materials and are fixedly combined with the base body of the cutting blade after being sintered under high temperature and high pressure. Fourthly, the super-hard polycrystalline cutting blade is made through the procedures of abrasive fabrication and blade-opening. The invention resolves problems of un-solid welding, easy peeling and high manufacture cost of an integral tool-holder super-hard cutter of the existing super-hard composite cutting blade. The invention not only increases the rigidity of the composite super-hard cutters, but also greatly reduces the using amount of super-hard material powder, and lowers the manufacture cost.

The invention discloses a pedestrian indoor track positioning method. The pedestrian indoor track positioning method comprises the following steps of enabling a sensor to collect three-axis acceleration, three-axis angular speed and three-axis magnetic sensing intensity under a carrier coordinate system, and using same as data sources, wherein the three axes comprise an X axis, a Y axis and an Z axis; counting the steps, and detecting the gait; calculating the heading angle, and correcting the heading angle on the basis of main direction; when walking along a straight line, using a heuristic random drift eliminating method to correct the heading angle; when walking along a curved line, using an extended Kalman filter to compensate the offset, and correct the heading angle; according to thethree-axis acceleration, establishing a non-linear step length estimation model, and calculating the step length in the walking process; according to the step state, the number of walking steps, theheading angle and the step length, calculating the walking track and position of a pedestrian. The pedestrian indoor track positioning method has the advantages that the error in detection of step length is effectively reduced, the indoor positioning precision is improved, the problem of divergence of heading angle due to gyroscope drift is solved, and the estimation precision of a user is improved when the step length is diversified.

The invention relates to a deep defect quantifying method based on an eddy rotating probe signal. The method comprises the steps of 1, acquiring a calibrated defect impedance variation vector signal; 2, performing differential treatment for the defect signal; 3, normalizing the signal; 4, forming a calibration quantifying curved line; 5, acquiring an actual signal; 6, performing deep defect quantifying for the actual signal through the calibration quantifying curved line. With the adoption of the method, the problem of failure of quantifying of a rotating probe can be solved; the algorithm transformation is performed to solve the drifting problem of an absolute signal.

The invention discloses a method for automatically extracting a terrain characteristic line according to vector contour line data. The method for automatically extracting the terrain characteristic line according to the vector contour line data comprises the following steps of: determining characteristic points of terrain; classifying the characteristic points to obtain ridge points and valley points; determining judgment factors for generating a ridge line and a valley line; and automatically generating the ridge line and the valley line. The characteristic points of the terrain such as the ridge points and the valley points are determined by using the characteristics of curved lines of a vector contour line and a geometrical morphology analysis method, and then connected to form the terrain characteristic line such as the ridge line and the valley line. The method is high in identification speed, the extracted terrain characteristic line such as the ridge line and the valley line is in accordance with actual terrain change, and errors caused by manual extraction can be effectively eliminated. The method can be used for extracting a terrain contour line from digital terrain data. Furthermore, the method is convenient to operate, simple, and great in practical application value.

A gas introducing structure of an intake path includes a gas introducing path introducing a gas into an intake airflow in the intake path of an internal combustion engine, wherein an inner peripheral surface of the gas introducing path is made of a bottom surface appearing as a straight line at a lower side of a perpendicular cross section of the inner peripheral surface and a curved wall surface appearing as a convex curved line, connecting with each end of the straight line at an angle, at an upper side of the perpendicular cross section of the inner peripheral surface.

Dynamic motion decoupling is effected with the use of mass, added mass, buoyancy, submerged weight and drag in areas of relatively low tension. High curvatures of lines on some configurations, together with their low slope may be utilized. The original line configuration may or may not be modified. Known motion suppressing device designs can be used. Because of the low slope on some configurations, said motion suppressing devices can be installed on arbitrarily long line segments to achieve objections required. Novel, drag and added mass enhancing devices effective in all directions can be used to increase the suppression effectiveness and/or in order to reduce the number of devices used. This invention is suitable for use on new designs and it is also suitable for retrofitting on existing, already installed lines.

The invention relates to an object segmentation method based on a priori shape and a CV (Computer Vision) model. The method comprises the following steps of: constructing a signed distance function by selecting the priori shape; carrying out affine transformation on the signed distance function of the priori shape according to vectors of affine transformation parameters, wherein the affine transformation parameters are changed and finally tend to stabilize in the process of iterating a level set function; and finally, obtaining various affine transformation parameters of the next time according to a level set iteration formula evolution movable outline curved line and various affine parameter iteration formulae. According to the method disclosed by the invention, on the basis of keeping rotary, zoom and translation invariance of a priori shape model, stretching in X and Y directions and shear unchanged constraint energy item can be increased; and a space object with larger posture transformation under a complex background can be well segmented by expanding the self-adaptive transformation of the priori shape.