167 results about "Minor axis" patented technology

Methods, systems and apparatuses may provide for technology that determines a major axis length of an ellipse in texture space based on a transformation matrix associated with a circle in screen space, inverts the major axis length, determines a product between the inverted major axis length and a determinant of the transformation matrix, and determines a minor axis length based on a modulus of the product between the inverted major axis length and the determinant of the transformation matrix. In one example, the technology selects a level of detail in the texture space based on the major axis length, the minor axis length, a direction of the major axis length, and a direction of the minor axis length.

The invention belongs to the technical field of scanning measurement, particularly relates to a cable outer diameter and ovality measurement method and system based on line laser contour scanning, and aims to solve the technical problem of low measurement precision caused by the fact that an existing algorithm is sensitive to noise, asymmetry of light strips and contour discrete points. The measurement method comprises the following steps: S1, performing anisotropic Gaussian filtering on a pixel according to a local tangential direction of a preliminary center line; s2, calculating a second derivative value and a third derivative value of the sub-pixel center point in the normal direction; s3, performing initial weighted least square ellipse fitting by using the corrected contour point set and the corresponding fitting weight to obtain parameters of an initial ellipse; and S4, based on the lengths of the long axis and the short axis of the fitting ellipse, calculating to obtain the outer diameter and the ellipticity of the cable. According to the measurement method, the interference of abnormal data points introduced by local flaws such as oil stains and scratches on the surface of the cable is eliminated, and the accuracy and the stability of a fitting result are improved.

The invention provides a polarization selectivity all-dielectric high-saturation structural color metasurface with a maintainable color center. The metasurface sequentially comprises a SiO2 semi-ellipsoid layer, a GaN elliptic cylinder array and a PDMS flexible substrate from top to bottom, wherein the SiO2 semi-ellipsoid layer and the GaN elliptic cylinder array form a periodically arranged double-layer all-dielectric nanostructure unit. Under the condition of x polarization incidence, the structure generates a narrow-band high-reflection structural color in a visible light wave band, the full width at half maximum of a main reflection peak is about 9 nm, the peak reflectivity can reach 99.8% or above, and the reflectivity of a secondary reflection peak on the short wave side is lower than 0.01; and under the y polarization incidence condition orthogonal to the light source, the reflectivity near the corresponding wavelength is lower than 2%, and the light source shows remarkable polarization selectivity. The inventor further finds that when the equivalent radius change of the nano unit causes the reduction of the reflection efficiency, the reflectivity of the main peak can be recovered by adjusting the long-short axis ratio of the GaN elliptic cylinder and the SiO2 semi-ellipsoid, and the central wavelength of the main formant is basically kept unchanged, so that the brightness adjustment is realized on the premise that the color center is basically constant. The structure is suitable for flexible or wearable optical devices, polarization-related structural color display and other applications.

There is discussed a method of picking and placing bulbs, in which bulbs are supplied on a supply surface of a bulbs supply system; the bulbs being identified and picked from the supply surface with a pick-and-place head; wherein the bulbs are reoriented about a minor axis before being placed.

A connector (10) for coupling a tube (12) to a receptacle comprises an end piece (14) formed at the end of the tube (12), which is arranged such that it can be inserted into the receptacle in an assembly position and slid into a latched position. A retaining element surrounds the receptacle and has first and second legs (62) that extend into the receptacle. The legs (62) each have a cross-section with a first minor axis that is smaller than a second major axis. The end piece (14) engages the minor axis of the legs (62) and presses the legs (62) into a spread state, while the end piece (14) slides from the assembly position into the latched position. In the latched position, the legs (62) retract into a relaxed state and are engaged in a groove (13, 50) in the end piece.

A phase difference sheet including a substrate and a phase difference film as a tilt film, wherein, in a biaxial refractive index ellipsoid exhibiting a refractive index anisotropy, of three principal refractive indexes nx, ny, nz, the principal refractive index in the length direction of a columnar structure, i.e., the X-axis direction, is nx, the principal refractive index in the major axis direction of an ellipse perpendicular to the X-axis, i.e., the Y-axis direction, is ny, and the principal refractive index in the minor axis direction, i.e., the Z-axis direction, is nz, the following conditional expression (1) is satisfied, and, in a case where the incident angle of a direction tilted to the X-axis side with the normal as a reference is positive, the phase difference of incident light at an incident angle of +30° is Re(+30), the phase difference of incident light at an incident angle of -30° is Re(-30), and the ratio of Re(+30) to Re(-30), i.e., the phase difference ratio, is Re(30) ratio, the following conditional expression (2) is satisfied, ny > nx > nz (1), Re(30) ratio = Re(30) / Re(-30) = 1.1 to 4.0 (2).

A drill string comprising: an elongate hollow main length section (101); a male casing portion (108) provided at a second end (106), the male casing portion having an externally threaded section (107) and a non-threaded shank (109) axially positioned intermediate the main length section (101) and the threaded section (107); the shank (109) having a transition section (206) positioned adjacent a radially protruding shoulder (110) at the second end (106) or the main length section (101), the transition section (206); wherein a cross-sectional shape profile of an outer surface of the transition section (206) in a plane of a longitudinal axis (204) comprises a segment of an ellipse having a semi-major axis (a), a semi-minor axis (b); wherein a ratio of the semi-major axis to the semi-minor axis (a:b) is within a range 2b

The utility model relates to the technical field of medical instruments, and provides an eyeball surface flushing unit and a flusher, the flushing unit comprises a needle seat and a hollow needle tube, the needle tube comprises a flushing end and a connecting end, the connecting end is connected with the needle seat, the cross section of the needle tube is oval or kidney-round, the long axis of the cross section is 1.4-3mm, and the short axis of the cross section is 1.0-2mm. And the end part of the flushing end of the needle tube is blunt and flat. A trumpet-shaped flushing part is arranged at the flushing end of the needle tube, and a flushing opening of the flushing part is oval or kidney-shaped. And the length of the needle tube is 3-5cm. The needle tube has the advantages that the size of the hole of the needle tube is larger than that of a traditional needle tube, water flow is thicker, compared with traditional thin water flow, the impact force of the water flow is smaller, the situation that the water flow is splashed to pollute the full retinoscope and form water drops due to too large impact force of the water flow is avoided, the view of an operator cannot be affected, and smooth operation is guaranteed. In addition, the oval section is combined, water flow is flattened, and the flushing effect is better compared with a circular design.

To provide a grease composition having low torque.SOLUTION: A grease composition comprises a base oil (A) and a thickener (B), wherein when a minor axis and a major axis of the thickener (B) in the grease composition are measured using a dielectric constant observation system of a scanning electron microscope, an aspect ratio (minor axis / major axis) of the thickener (B) is less than 0.23.SELECTED DRAWING: None

This invention provides a calcium carbonate compound and an inorganic molded body with shape controlled by having a high aspect ratio. The invention relates to a calcium carbonate compound having a phosphorus content of 1000 ppm or more and 15000 ppm or less, a sulfur content of 2000 ppm or less, and an aspect ratio (mean major axis to mean minor axis) of 6 or more and 19 or less.

An apparatus for generating a defined laser illumination (12) on a work plane (14) has a laser light source (20) that generates a raw laser beam (22). An optical assembly (24) receives the raw laser beam (22) and shapes it into an illumination beam (26) along an optical axis (40). The illumination beam (26) defines a beam direction (28) that intersects the work plane (14). The illumination beam (26) has a beam profile (42; 42') in a region of the work plane (14) that has a major axis (44) perpendicular to the beam direction (28) with a major axis beam width and a minor axis (46) with a minor axis beam width. The optical assembly (24) includes a beam transformer (30) with an exit aperture, a first set of optical elements (56, 60, 62, 64) for beam shaping on the major axis, and a second set of optical elements (34, 36, 38) for beam shaping on the minor axis. The beam transformer (30) widens the raw laser beam (22) on the major axis to generate a widened raw laser beam. The first set of optical elements (56, 60, 62, 64) includes a homogenizer (56) that homogenizes the widened raw laser beam on the major axis. The second set of optical elements (34, 36, 38) includes at least one lens (38) that images the exit aperture of the beam transformer (30) into the work plane. The first set of optical elements (56, 60, 62, 64) generates an intermediate image (66) behind the homogenizer (56) and further implements an imaging optical unit that images the intermediate image (66) into the work plane (14).

An X-ray source is provided comprising a target generator configured to generate a liquid jet having an elongated cross with a major axis and a minor axis; an electron source configured to generate an electron beam arranged to interact with the liquid jet in an interaction region to generate X-ray radiation; and an X-ray transparent window arranged to transmit X-ray radiation generated in the interaction region, wherein the X-ray transparent window is located for extraction of X-ray radiation at an angle α relative to the major axis; wherein the target generator is configured to generate the liquid jet such that said jet has a thickness at the interaction region, along a propagation direction of the electron beam, that is less than an electron penetration depth of the electron beam in the liquid jet. A corresponding method for generating X-ray radiation is also provided.

Provided are a molded article that has excellent flame retardancy, and even though it contains fibers, can exhibit a small amount of deformation caused by flame contact that can be suppressed to a level comparable to that before deformation, and a propylene-based resin composition capable of producing the molded article. A polypropylene-based resin composition contains a polypropylene-based polymer (A), a flame retardant (B), and fibers (C), in which the fibers (C) include a fiber having a flat cross-sectional shape in which a ratio of a major axis to a minor axis [major axis / minor axis] in a cross section is 2.0 or more, and a molded article contains the polypropylene-based resin composition.

To address the issues of insufficient performance and high cost associated with integral casting and additive manufacturing methods for parts with small-entry elliptical gradient deep cavities, and the difficulties, low efficiency, and high cost of metal removal methods, this invention proposes a machining method for elliptical gradient deep cavities with small entry points. The method involves first rough drilling and rough turning to obtain a deep hole. Then, a step-by-step machining approach is adopted, dividing the part into regions and machining them axially and radially. First, the part is tilted to machine the regions on both sides of the major axis of the ellipse. Then, the part is turned upright to machine the regions on both sides of the minor axis of the ellipse. During the upright machining, a radial layering and thin-cutting fast-running method is used. Several layers are machined using the first toolpath until the machining residue in the undercut and triangular regions is removed. Then, a second toolpath is used for contour machining to obtain a gradient deep cavity with an elliptical cross-section. Finally, the gradient deep cavity is precision milled until its internal dimensions and surface roughness meet the design requirements.

A steel sheet according to the present disclosure which has the chemical composition described in the description, wherein: the bainite area ratio is 70% or more, the aspect ratio As of crystal grains HAGB is 4.00 or more, and the maximum value HVmax of the Vickers hardness is 240HV or less in a surface layer region extending from the surface of the steel sheet to a depth of 0.5mm; the bainite area ratio is 50% or more and the minor axis of bainite crystal grains HAGB is 30.0μm or less in a t / 4 region; and the aspect ratio As of the crystal grains HAGB in the surface layer region and the aspect ratio At / 4 of the crystal grains HAGB in the t / 4 region satisfy formula (1).　(1): 1.00≤As / At / 4≤5.00

This invention relates to the field of shipbuilding technology and discloses a method for lofting and unfolding a sloping cylindrical structure, comprising the following steps: S1, creating a side view and a normal section view; S2, obtaining the minor axis projection line HV in the side view; S3, obtaining the minor axis section projection line H1V1 and the major axis section projection line P1W1 in the normal section view; S4, obtaining the major axis projection line PW in the side view; S5, drawing perpendicular lines from points P and W to the center line of the cylinder to obtain line segment QT; S6, dividing the normal section view into equal parts, projecting each division point onto line segment QT to obtain equal division projection points, and unfolding the sloping contour to obtain unfolding points; S8, repeating S7, smoothly connecting each unfolding point; S9, obtaining the generatrix unfolding points, connecting two generatrix unfolding points to complete the lofting and unfolding diagram of the sloping cylindrical structure. Using the minor axis projection line and the major axis projection line as a reference, the lofting and unfolding of the cylinder is achieved, realizing accurate lofting and unfolding of any sloping cylindrical structure, facilitating cylinder installation.

The invention discloses a light guide glass calendering roller and a preparation method and application thereof, and relates to the technical field of calendering rollers, the surface of a roller body of the light guide glass calendering roller is provided with a plurality of groups of convex columns which are distributed in parallel and have semi-elliptical sections, the length ratio of the long axis to the short axis of the semi-ellipse is 1: (10-20), and the distance between every two adjacent convex columns is smaller than or equal to 5 microns. Due to the design of the convex columns on the surface of the roller body, lines corresponding to the distribution state of the convex columns can be pressed on the surface of the light guide glass when the light guide glass is rolled, so that the light guide performance of the light guide glass is improved; meanwhile, the Co-Cr alloy plating layer is arranged outside the roller body, so that in the actual production process, when the calendering roller rotates, the roller is often damaged due to the impact of molten foreign matters in molten glass; the addition of cobalt in the Co-Cr alloy coating can form a finer and more uniform co-deposition structure, reduce brittle phases, improve the energy absorption capability of the Co-Cr alloy coating under dynamic load, and further improve the impact resistance of the calendering roller.

To provide a microstrip antenna that can improve the efficiency of energy conversion from an electric signal to a radio wave.SOLUTION: A microstrip antenna includes a radiating element. The radiating element has a first radiating region having a first major axis parallel to a first direction and a first minor axis perpendicular to the first major axis, and a second radiating region having a second major axis parallel to the first direction and longer than the first major axis, and a second minor axis perpendicular to the second major axis. The length of the second minor axis is shorter than the length of the first minor axis.SELECTED DRAWING: Figure 1

The present invention relates to a metal powder containing a metal of Au, Ag, Cu, or an alloy thereof, having an average particle size of 0.1 μm or more and 0.4 μm or less, and purity of 99.9% by mass or more. In this metal powder, a presence ratio, in terms of the number of particles, of non-spherical particles in the metal powder having a ratio (b / a) of a minor axis “a” and a major axis “b” of 3 or more is 1% or less. As a method for producing such a metal powder, in a wet reduction method including a metal colloid synthesis step and a metal powder granulation step of granulating metal colloidal particles into a metal powder, surfactants having alkyl groups having carbon numbers falling within specified ranges are preferably used as first and second dispersants in the metal colloid synthesis step and the metal powder granulation step.

An eight-mode multiplexer / demultiplexer based on a refractive index step type non-degenerate mode main channel is characterized in that a transmission channel is formed by one eight-mode elliptical fiber core (EC) and seven single-mode fiber cores, and the elliptical fiber core at the coordinate center serves as a transmission main channel and penetrates through two sections; the single-mode fiber core serving as a side core is a transmission coupling channel, two ends of the single-mode fiber core are coupled, and the second section is arranged at the rear end of the longest coupling length of the first section; the length of a transmission main channel of the elliptical fiber core is 11.37 mm, the ellipticity rho of the elliptical core is 1.58, the length of a major semi-axis is 7.02 [mu] m, and the length of a minor semi-axis is 4.44 [mu] m; the length of the SMF-HG10 is 8.112 mm, the length of the SMF-HG01 is 4.976 mm, the length of the SMF-HG20 is 3.258 mm, the length of the SMF-HG11 is 1.190 mm, the length of the SMF-HG30 is 1.626 mm, and the length of the SMF-HG21 is 1.964 mm; the refractive index difference between the main modes of the multiplexer and the demultiplexer is greater than 1 * 10 <-3 >, the mode degeneracy of HG30 and HG02 is broken, and the mode preserving function is realized; the refractive index fiber core made of pure silicon dioxide is adopted to reduce loss; the side core is divided into two sections for coupling, so that low-loss and low-crosstalk multiplexing and demultiplexing of eight modes are realized, and MIMO-FREE operation is realized.

This rotor comprises: a rotor core that has an outer circumference extending in a circumferential direction centered on a central axis, and magnet insertion holes along the outer circumference; and permanent magnets that are disposed in the magnet insertion holes and constitute magnetic poles. When a straight line passing through the central axis and the center of a magnet insertion hole in the circumferential direction is defined as a d-axis, and a straight line passing through the central axis and an inter-pole section spaced apart from the magnet insertion hole in the circumferential direction is defined as a q-axis, at least one portion of the section from the d-axis to the q-axis in the outer circumference of the rotor core is formed as an elliptical arc section centered on the d-axis, and the elliptical arc portion has line symmetry with the d-axis. When the distance on the d-axis from the central axis to the outer circumference is defined as r, the elliptical arc section is tangent to a circle having the radius r centered on the central axis at one point on the d-axis. The elliptical arc section has a first axis in a direction orthogonal to the d-axis, and has a second axis on the d-axis. The first axis is one among a major axis and a minor axis, and the second axis is the other among the major axis and the minor axis. When the length of the second axis is defined as 2b and the distance from the central axis to the center of the elliptical arc section is defined as k, the expression k = r-b is established.

Flake-like copper particles according to the present invention have an average number of crystal grains of 150 to 2,000 inclusive as measured by observing cross-sectional surfaces of the flake-like copper particles by an electron backscattered diffraction method. When viewed in plan, if the longest line segment crossing a particle is defined as the major axis and the perpendicular bisector of the major axis is defined as the minor axis, the number of crystal grains in the plan view is 4.5 per µm2 to 40.0 per µm2 inclusive with respect to the value (µm2) of the product of the major axis length and the minor axis length. It is preferable that the crystal grain size is 0.2 µm to 1.3 µm inclusive. In a plan view, it is preferable that the average size of the crystal grains that are positioned in the peripheral region of a particle is smaller than the average size of the crystal grains that are positioned in the central region of the particle.

Member (20) for taking up and dispensing a fluid product (P), notably a cosmetic product, contained in a container (10), the member (20) comprising: - an uptake and dispensing tube (21), and - an uptake and dispensing bulb (40) secured indirectly to the tube (21) and comprising a neck (41) and a hollow body (42) that is elastically compressible and extends axially from the neck (41) towards the outside, said hollow body (42) being bounded radially by two lateral pressing walls (43a, 43b) facing one another and two junctions (44a, 44b), the lateral pressing walls (43a, 43b) having a width greater than the width of the junctions (44a, 44b), the neck (41) having a thickness greater than the thickness of the lateral pressing walls (43a, 43b), said hollow body (42) having a cross section in the radial direction the shape of which is non-circular, preferably elliptical, defining a major axis (A) and a minor axis (a), the ratio (a / A) between the major axis and the minor axis being strictly less than 0.8.

Provided is a method for producing a granulated substance (100) including a plurality of flat-shaped magnetic nanoparticles (30) in which, as a single body, a major axis and a minor axis shorter than the major axis intersect with each other and a flat surface along the major axis is wider than a side surface along the minor axis. The plurality of magnetic nanoparticles are mixed with a solvent (111) to generate a liquid first intermediate product (110). The plurality of magnetic nanoparticles contained in the liquid first intermediate product are dispersed. An external magnetic field having a gradient is applied to the dispersed first intermediate product to generate a second intermediate product (120) in which the plurality of magnetic nanoparticles are magnetically oriented. The liquid second intermediate product is solidified. The second intermediate product in a solidified state is granulated to generate a granulated substance including a plurality of the magnetically oriented magnetic nanoparticles.

This invention discloses a surgical instrument connection structure, including a main instrument connection part and an insertion instrument connection part. The main instrument connection part has an instrument groove, and the vertical sidewall of the instrument groove has a strip-shaped protrusion aligned with the instrument insertion direction. The insertion instrument connection part includes a protrusion and a handle. The cross-section of the protrusion is approximately circular with a major axis and a minor axis. When the minor axis of the protrusion is aligned with the strip-shaped protrusion on the instrument groove, the insertion instrument connection part can move freely within the instrument groove along its axial direction. When the major axis of the protrusion is aligned with the strip-shaped protrusion on the instrument groove, the protrusion of the insertion instrument connection part and the strip-shaped protrusion press against each other, thus fixing the insertion instrument connection part and the main instrument connection part relatively. This invention has a simple structure, is easy to operate, easy to manufacture, inexpensive, and easier to popularize. Furthermore, the longitudinal relative position of the instrument connection can be adjusted arbitrarily within a certain range, adapting to surgical scenarios involving various simple combinations of instruments.

An upper for an article of footwear includes a mesh textile portion including pillars including one or more first yarns aligned in a first direction and defining a major axis of the mesh textile portion and links including one or more second yarns and aligned in a second direction defining a minor axis of the mesh textile portion. The minor axis is transverse the major axis, the pillars have a greater thickness and / or greater denier than the links, and the major axis is offset from a lengthwise dimension of the upper by a bias angle ranging from about 30° to about 60°.

This composite material contains copper and molybdenum, has a plate shape having a first surface as a main surface, has a composition in which the content ratio of copper is 20%-70% by mass, and has a structure including a matrix containing molybdenum and a first copper phase and a second copper phase dispersed in the matrix, wherein in a cross section perpendicular to the first surface, each cross-sectional area of the second copper phase is 900 μm2 or more, and each cross-sectional area of the first copper phase is smaller than the cross-sectional area of the second copper phase, the ratio of the total area of the second copper phase to the area of the cross section is 10%-50%, the aspect ratio obtained by dividing the average major axis of the second copper phase by the average minor axis thereof is 10 or more, and the relational expression Y ≤ -1.5551X + 285 is satisfied, wherein X is the content ratio of copper in the composite material, and Y is the Vickers hardness of a composite phase formed by the matrix and the first copper phase.

Methods, systems and apparatuses may provide for technology that determines a relative size of a sum of squares value with respect to a determinant value, wherein the sum of squares value corresponds to a transformation matrix and the determinant value corresponds to an equivalent matrix associated with the transformation matrix. The technology may also conduct a major axis length determination based on the sum of squares value, exclude the determinant value from the major axis length determination if the relative size exceeds a threshold, and conduct a minor axis length determination based on the sum of squares value and the determinant value.

This invention relates to the field of optical manipulation technology, and more specifically, to a method for optical manipulation based on a dimer. The purpose of this invention is to solve the problem of insufficient lateral optical force control. The dimer is constructed by assembling two isotropic particles, and is placed on a sample stage and completely immersed in a homogeneous medium. The optical manipulation method is as follows: a circularly polarized Gaussian beam is shaped into an incident light with an elliptical cross-section. The incident light is guided to obliquely illuminate the dimer and project an elliptical spot with a major axis and a minor axis onto the substrate of the sample stage. The angle of inclination formed by the incident light and the normal to the substrate of the sample stage is ∈ (0°, 90°), with the major axis perpendicular to the propagation direction of the incident light and the axis of the dimer parallel to the minor axis, so that the incident light induces a lateral optical force on the dimer, the direction of which is parallel to the major axis. By adjusting the rotation direction of the circularly polarized Gaussian beam and the angle of inclination, optical manipulation of the dimer's motion direction and velocity can be achieved.

To obtain a conjugate fiber capable of providing a fabric or a nonwoven fabric having both high stretchability and softness.SOLUTION: The conjugate fiber is a flat multi-lobal fiber composed of two kinds of polyesters of an A component and a B component and having a flatness of 1.8-4.0 as a ratio of a major axis (a) to a minor axis (b), a plurality of convex parts symmetrical to the major axis (a) and composed of the A component, and a ratio of a maximum length (b) to a minimum length (c) of the convex part of 1.1-1.5, and has a side-by-side or eccentric sheath-core composite structure having a polymer interface perpendicular to the major axis (a).SELECTED DRAWING: Figure 1