87 results about "Symmetry line" patented technology

The injection of finely atomized liquid-droplets into the intake air flow of a compressor is used, for example, to improve the output of a gas turbine. If the atomization is effected via pressure atomizer nozzles, it is advantageous, when the injection device is operated with a portion of the design mass flow, to admit liquid to only some of the atomizer nozzles of the injection device. The atomizer nozzles may be arranged on nozzle tubes, liquid being jointly admitted to all the atomizer nozzles arranged on a respective nozzle tube, operated in such a way that the same mass flow is injected on each side of a symmetry line. To this end, nozzle tubes may be combined to form groups, to which liquid is jointly admitted, and the tubes of a group may be arranged in mirror image to one another relative to the symmetry line.

An antenna apparatus is configured to include first, second, third and fourth antennas. The first and fourth antennas are provided to be symmetrical with respect to a predetermined symmetry line on the grounding conductor, and the second and third antennas are arranged to be symmetrical with respect to the symmetry line so that the second and third feeding points are separated apart by a predetermined distance. A first antenna element of the first antenna and a fourth antenna element of the fourth antenna are formed to be substantially parallel to a Y-axis direction, and a second antenna element of the second antenna and a third antenna element of the third antenna are formed to be substantially parallel to an X-axis direction.

A method, product and system for implementing liveness detector for face verification. A method comprising detecting a symmetry line of the face; and verifying that the subject moved the mouth by computing a score based on values of a pair of images in the symmetry lines, wherein the score is indicative to a difference in the shape of the mouth between the pair of images. Another method comprises: verifying identity of a subject based on facial recognition and voice recognition, said verifying comprise determining there is mouth movement in an image sequence, wherein said determining comprises: in each image of the sequence, detecting a symmetry line of the face; and verifying that the subject moved the mouth, wherein said verifying comprises: computing a score based on comparison of symmetry lines of the face in different images of the set of images; and comparing the score with a threshold.

A computer-readable medium stores a specification for a circuit layout. The specification includes: a configuration of rooms for placing devices, one or more room constraints for the configuration of rooms, one or more groups of devices for the rooms, and one or more device constraints for devices in a same room. The configuration of rooms may include a tree-structure for the rooms. The room constraints may include a common symmetry line for a first room and a second room. The device constraints may include a self-symmetry constraint for a first device about a symmetry line in a first room. The device constraints may include a symmetry constraint for a first device and a second device about a symmetry line in a first room. The devices may include analog or RF (radio frequency) devices.

The inventive embodiment provides a light projection engine apparatus, including: a light source, PBS adopting symmetry lines grid, a first modulation imaging device, a second modulation imaging device, a projection lens system and a control command providing device. The inventive embodiment improves the light efficiency of modulation and image forming by improvements of use ratio of illumination light come form the polarization illumination light of the PBS.

The invention belongs to the technical field of ocean engineering and relates to a measuring method of an embedded movement locus of a towing anchor in soil body for an ocean platform anchoring system; the method comprises the following steps: (1) a drawing wire sensor is fixed; (2) a double-shaft tilt angle sensor is embedded in the towing anchor, the axes of the double-shaft tilt angle sensor and the axes of an anchor plate are aligned for ensuring anchor shank connection to be symmetrical by taking the axes of the anchor plate as symmetry line; (3) the drawing wire of the drawing wire sensor is connected to the tail part of the towing anchor by a pulley block; (4) the towing anchor is arranged on a sea bed surface for forming initial embedding angle; (5) horizontal external force is exerted on the towing anchor on the axes of the anchor plate, so as to lead the towing anchor to be embedded in the soil body and collect signals obtained by the drawing wire sensor and the double-shaft tilt angle sensor in a real-time manner; (6) the momentary horizontal and longitudinal coordinates of the towing anchor is computed iteratively for obtaining complete embedded movement locus of the anchor plate in the soil body. The invention provides a measuring device for realizing the method at the same time. The measuring method and the device have the advantages of simple equipment, easy implement and high precision.

The invention discloses a hanging type pipe clamp, which comprises a clamping element and a connecting element, wherein the clamping element is integrally formed through bending an elastic steel bar, the clamping element comprises an arc-shaped accommodating part, a first end part, a second end part, a first transition part and a second transition part, the first end part and the second end part are in vertical laminated arrangement, the first end part is positioned above the second end part, the hanging type pipe clamp also comprises a first connecting hole and a second connecting hole, in a state that the first connecting hole and the second connecting hole share one center line, the center line is the same line as the symmetry line of the arc-shaped accommodating part, the connecting element comprises a sleeve, an annular lug boss and a flange, a penetrated threaded hole is formed inside the connecting element, the flange is formed through reaming after the connecting element passes through the second connecting hole, and the outer diameter of the flange is greater than the hole diameter of the second connecting hole and is smaller than the hole diameter of the first connecting hole. The hanging type pipe clamp has the advantages that the structure is simple, the installation, the storage and the transportation are convenient, in addition, pipe fittings can be effectively protected, and the outer surfaces of the pipe fittings are prevented from being damaged.

First and second paths of the primary-coil of the transformer are located at different sides of the symmetry-line. First terminals of the first and second paths are first and second ports of the primary-coil. Second terminals of the first and second paths are connected to each other. Two partial paths of the first path are connected to each other by TSV. Two partial paths of the second path are connected to each other by TSV. Third and fourth paths of the secondary-coil of the transformer are located on different sides of the symmetry-line. First terminals of the third and fourth paths are first and second ports of the secondary-coil. Second terminals of the third and fourth paths are connected to each other. Two partial paths of the third path are connected to each other by TSV. Two partial paths of the fourth path are connected to each other by TSV.

The invention discloses a zero-flux fluxgate current sensor for AC-DC heavy-current measurement. The sensor comprises a primary current line, a secondary current line, an annular magnetic core, a fluxgate measuring magnetic core unit, and a processing circuit. The primary current line passes through the center of the annular magnetic core to be connected with a current line to be measured. The secondary current line is wound around the annular magnetic core. The geometrical symmetry line of the annular magnetic core is provided with two symmetrical grooves. The fluxgate measuring magnetic core unit is fixed in the grooves of the annular magnetic core and is connected with the input end of the processing circuit. The primary current line passes through the center of the annular magnetic core and generates a primary magnetic flux. The fluxgate measuring magnetic core unit generates a voltage signal based on the induced magnetic flux, and the voltage signal outputs secondary current to the secondary current line via the processing circuit. The secondary current line generates a secondary magnetic flux on the annular magnetic core, wherein the secondary magnetic flux forms a dynamic balance with the primary magnetic flux. Based on the measurement result of the secondary current, a primary current value to be measured can be obtained.

The invention relates to a flexible armored pipe for transportation of fluids, comprising an inner sealing sheath and at least one displacement reduced armor layer comprising a plurality of elongate elements comprising at least a female type elongate element comprising at least one recess in each opposite side and a male type elongate element comprising at least one protruding tongue in each opposite side and wherein each of the female type and the male type elongate elements are substantially symmetrical in a symmetry line substantially normal to the inner sealing sheath when the pipe is in a non-bended state and where said protruding tongues of said male type elongate element windings are engaged in said recesses of adjacent female type elongate element windings.

A sparse array antenna is disclosed. The antenna comprises series-fed antenna array columns tuned to a respective transmit and receive frequency. The transmitting and receiving radiation elements are formed with a given distance between each transmitting radiator element and each receiving radiator element, and the series-fed antenna columns are arranged in parallel, perpendicular to a symmetry line forming a symmetric interleaved transmit/receive array. Furthermore the receiving array columns operate as parasitic elements in a transmit mode and transmitting array columns operate as a parasitic elements in a receive mode, thereby reducing creation of grating lobes. The created sparse array antenna may further be arranged to be scanable to also provide reduced sidelobes entering visual space when scanning the main radiation lobe from an off boresight direction. Typically the series-fed array columns may be formed as extended ridged slotted wave-guides tuned to a respective transmitting or receiving frequency.

A semiconductor device is composed of a power supply interconnection extending from a certain starting point in a first direction and also extending from the starting point in a second direction orthogonal to the first direction, a plurality of power pads, and connecting interconnections providing electrical connection between the power supply interconnection and the power pads. The power supply interconnection, the power pads, and the connecting interconnections are arranged in a symmetrical manner with respect to a symmetry line crossing the starting point and extending in a direction at an angle of 45 degree to the first and second directions.

First and second paths of the primary-coil of the transformer are located at different sides of the symmetry-line. First terminals of the first and second paths are first and second ports of the primary-coil. Second terminals of the first and second paths are connected to each other. Two partial paths of the first path are connected to each other by TSV. Two partial paths of the second path are connected to each other by TSV. Third and fourth paths of the secondary-coil of the transformer are located on different sides of the symmetry-line. First terminals of the third and fourth paths are first and second ports of the secondary-coil. Second terminals of the third and fourth paths are connected to each other. Two partial paths of the third path are connected to each other by TSV. Two partial paths of the fourth path are connected to each other by TSV.

The invention discloses an optical rotary table, which is formed by a driving source, a roller lead screw, a nut, a sliding block, a guide plate, a connecting rod, a middle post, a bearing, a plate, a base, a roller sheath, a rolling guide rail, a tension spring, a read block and a pointer. Wherein, said optical rotary table is left and right symmetry; the connecting rod, plate, roller guide rail, roller, roller sheath, read block and point are both distributed one group at the left and right of symmetry line. The invention has simple structure and easy installment, while two groups of optical elements rotate coaxially in reversed directions synchronously and the rotate angle difference can be accurately adjusted.