1442 results about "Middle segment" patented technology

An artificial heart valve and weaving method thereof are disclosed. The valve stent includes a tubular stent (10), valve leaflets (33), sealing membranes (351, 354), x-ray opaque markers (311, 312) and flexible connecting loops (41). The middle segment (15) of the net stent (10) is tubular or drum-shaped, or provided with radial protrusion structures (153), or provided with outer annular structures (155), or provided with outer free tongues (156), or provided with radial protrusion structures (153) and outer free tongues (156). The stent can be made by up and down interweaving the same one elastic metal wire, and also can be made by up and down interweaving different elastic metal wires. Moreover, the structure, shape and function of the valve stent are optimized; in radical compression, the valve can be transported to the right place with the help of interventional device; after expansion, fitted with figure of the vascular wall in the radical and axial direction, the artificial heart valve stent will not produce paravalvular leak; even more after implanting, the valve has a normal effect on prevent the slippage of artificial valve, which is caused by the blood reflux through the closed valve.

The invention relates to a remote high precision autonomous integrated navigation and positioning method, which is characterized in that a Strapdown Inertial Navigation System (SINS) is used as a main navigation system during the whole flight course of the aircraft, assisted by 3D high precision position and attitude angle information provided by celestial navigation system (CNS) based on the least square differential correction in boost phase (or middle segment). In reentry phase (terminal), using the characteristics of synthetic aperture radar (SAR), such as strong penetration capability, high resolving precision and all-weather, the SINS can be corrected through accurate location information and course information provided by SAR scene matching after motion compensation when the aircraft reentry into atmospheres, so the impact point (hit) accuracy of the aircraft can be increased and the invention has remarkable effects of eliminating or decreasing non-guidance error. The invention has advantages of autonomy and high precision, which can be used for improving remote ballistic missile, remote cruise missile, navigation and positioning accuracy of remote aircraft, such as long-endurance unmanned aerial vehicle, etc.

A braided stent comprises a filament having at least one circular zone and at least two non-circular zones. Embodiments of the braided stent have a proximal segment, a middle segment, and a distal segment, wherein a porosity of the middle segment is lower than, a respective porosity of the proximal and distal segments. In one embodiment, a radial pressure of the middle segment is separately controlled to be different from, e.g., less than, a radial pressure of the distal segment. In another embodiment, a stiffness of the middle segment is separately controlled to be different from, e.g., less than, a stiffness of the distal segment.

Electrode pattern disposed on a conductive surface is disclosed. The electrode pattern includes a plurality of conductive segments. The conductive segments are located along the edges of two or more concentric parallel polygons. Each edge of each polygon has one or more middle segments disposed between two end segments. For each edge of each polygon the middle segments are equal in length, and the segments are equally spaced. A touch sensor is disclosed that includes such an electrode pattern.

The invention discloses a medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method which comprises the following steps: dividing chamber jambs along the trend of an ore body; adopting a rail-less mining aligning system; pre-constructing a high-strength reinforced concrete artificial top in a segmented drilling lane; adopting a stoping sequence from up to down; performing drilling and blasting ore removal on the ore body through the segmented drilling lane at bottom; adopting medium-length hole drilling and remotely controlling a scraper to discharge ore; after finishing the mining of the chamber, utilizing concrete tailings to perform cemented filling; after finishing the mining of the jambs, utilizing concrete tailings or pure tailings to perform cemented filling; after completely stoping the mine chamber in the frame under the protection of the concrete artificial top, starting to stope the jamb adjacent to the segment, and meanwhile stoping the corresponding mine chamber in the frame of the next segment, and then stoping the corresponding jamb of the next segment; and after completely mining the chamber jamb in the middle segment, immediately turning towards the lower middle segment for stoping. The method provided by the invention has the advantages that the safety for mining the heavy-pitch medium thick crushed or ultra-crushed ore body is high, the resource depletion loss rate is low, the mechanical degree is high, the production capacity is high, and the like.

An electromagnetic component including a multi-layer, spiral coil structure embedded in a molded body is disclosed. Each layer of the coil structure makes approximately one and a quarter turns of a winding. Each layer of the coil structure has a loose middle segment, two slim end segments overlapping each other with a spacing therebetween, and tapered neck segments respectively connecting the loose middle segment with the two slim end segments.

A windshield wiper blade assembly comprises: an elastic wiper blade; first and second housings secured to and covering a top end of the wiper blade and made from a plastic material; and a middle housing disposed between the first and second housings and having two end segments and a middle segment extending between the end segments. The end segments of the middle housing cover and are secured to the top end of the wiper blade at the end sections of the middle portion, respectively, and have ends in contact with ends of the first and second housings, respectively. The middle segment defines a frame space for extension of a connecting piece therein and includes a skeleton and a plastic molding layer molded over the skeleton.

A segmented component for use with a gas turbine engine comprises a radially extending gas path portion. The gas path portion is for interacting with gas flow from the gas turbine engine. The component is divided into axially aligned segments comprising a forward segment, an aft segment, and a plurality of middle segments disposed between the forward segment and the aft segment. The middle segments comprise radially elongate ceramic matrix composite material plates. In one embodiment, the gas path portion comprises an airfoil for a turbine blade. In another embodiment, the gas path portion comprises a removable platform for a turbine blade. In another embodiment, the gas path portion comprises an airfoil for a turbine vane.

The invention relates to a method for constructing a segmental prefabricating and assembling swing foundation pier. The pier is assembled by prefabricated segments, and a bearing platform is hinged to a foundation. Except for the uppermost end connected with a cover beam and the bottom end connected with the bearing platform, the middle segments of the pier are same in shape and size. The oblique section of the upper part of the middle pier prefabricated segment slopes and is hollowed into a groove, namely a prefabricated segment groove; the bottom of the middle pier prefabricated segment is manufactured into a bulge with a corresponding shape, namely a prefabricated segment convex slot; the prefabricated segment groove and the prefabricated segment convex slot can realize the assembly of upper and lower pier prefabricated segments and forms the contact connecting surface of the segmental pier. The bottom of the pier is fixedly connected with the bearing platform, and the upper part of the pier is fixedly connected with the cover beam. After the prefabricated segments are assembled, a prestressed cable in a prepared channel is tensioned and anchored. A gap between a pile head and the contact surface of a prepared hole in the bottom of the bearing platform is filled with a rubber material or other elastic materials. The method has the advantages of short construction period, small environmental influence, good vibration isolation effect under earthquake and high anti-seismic property of whole structure.

A firefighting segmented monitor for redirecting a trajectory of a pressurized fluid discharge towards a target comprises a flowpath with minimum convolutions. The monitor flowpath comprises in series a stationary segment and three rotating segments including a lower segment, a middle segment and an upper segment connected in series each of which comprises a predetermined curvature. The lower segment swivels in one axis about the stationary segment. A nonorthogonal swivel is arranged on each end of the middle segment at the interfaces with the lower segment and the upper segment, and the swiveling of the middle and upper segments are synchronized with a single rotary input to produce an approximately planar elevational motion of the fluid discharge end of the monitor.

A horizontal freezing method for constructing the tunnel in soft stratum includes such steps as determining the saline temp in active freezing period and maintaining freezing period, the average temp of frozen earth wall and the strength of frozen earth, designing and arranging the freezing hole, calculating the cold needed by freezing, excavating the horn-shaped portal tunnel segments at both ends, excavating middle segments, and enlarging the tunnel.

An electromagnetic component including a multi-layer coil structure embedded in a molded body is disclosed. Each layer of the coil structure has a loose middle segment, two slim end segments overlapping each other with a spacing therebetween, and tapered neck segments respectively connecting the loose middle segment with the two slim end segments.

The invention provides a construction method for hollow thin-walled high pier non-bracket formwork turnover of railways. The method includes the following steps: formwork design and fabrication; first segment solid section construction, pedestrian ladder-way erection, reinforcement bar binding, formwork support and arrangement, and concrete pouring; middle segment section construction, pedestrian ladder-way erection, previous section bottom layer formwork removal, reinforcement bar binding, formwork support and arrangement, and concrete pouring; pier cap construction, bottom formwork support system erection, reinforcement bar binding, formwork support and arrangement, and concrete pouring. The invention has the effects that the method is suitable for the hollow thin-walled high piers of railway bridges; a set-shaped formwork with an operating platform is adopted; the formwork turnover method is adopted for construction; the construction personnel walk up and down through the erected pedestrian ladder-way; and the formwork is simplified in structure and is convenient to process. Moreover, the material and labor for erecting full space supports can be saved; the cost is reduced; the construction period is shortened; and the construction schedule is accelerated.

The invention discloses a central outside-vein house pillar type combined crosscut two-end inside-vein continuous segment filling mining method for medium-thickness inclined crushed phosphorus ores. The method comprises the following steps: dividing an ore into middle segments, dividing each of the middle segments into panels, dividing each of the panels into segments, dividing the center of each of the segments into ore houses and ore pillars, and dividing two ends of each of the segment along an inside-vein drilling ore-removal level non-pillar into recovery units; adopting a hanging side outside-vein trackless mining system which is formed by a panel ramp, a concentrated ore-removal ore-pass, segment levels at the central outside-vein and shifting to inside-vein at two sides, and an connection lane commonly used by the ore houses and the ore pillars; recovering the ore houses in the middle segments, filling close to back, and recovering the ore pillars; and carrying out parallel operations of technologies comprising drilling, exploding, supporting, ore removal, filling and the like of a plurality of the ore houses to realize continuous mining. The method disclosed in the invention has the substantial characteristics of improvement of the recovery safety and the panel productivity, reduction of the resource dilution rate and the mining-cutting ratio, increase of enterprise benefits and the like.

The invention relates to an integrative three-segment tripod. The tripod has a main bracket 1 and at least one stand leg, each stand leg including an upper segment, a middle segment and a lower segment, the upper segment is connected to the main bracket 1, the middle segment is telescopically connected to the upper segment, and the lower segment is telescopically connected to the middle segment, wherein the stand leg further includes a locking unit and a safety device, the locking unit is provided at the joints where the middle segment is joined the upper segment and the lower segment, and can fix the middle segment to the upper segment and simultaneously fix the lower segment to the middle segment, and the safety device is associated with the locking unit, which can keep the locking unit in the fixing state when the locking unit is in the locking position. Therefore, each stand leg of the tripod can be controlled easily by a single locking unit, and the safety device prevents the rotation lever from indeliberate release.

The invention provides a liquid phase synthesis method for bivalirudin. Firstly, three all-protected fragments, namely 6 peptide with an all-protected N-terminal, 6 peptide with an all-protected middle segment and 8 peptide with an all-protected C-terminal are gradually synthesized, then all-protected bivalirudin is obtained by orderly condensing the three fragments, finally all protective genes are removed to obtain a crude product of the bivalirudin, and then a pure product of the bivalirudin is obtained through high-efficiency liquid chromatography purification. The method does not need a resin, excessive protected amino acid and a condensing agent, is easy to realize mass production, and has relatively lower production cost.

A disposable, solution-mixing hair colorant dispenser: tubular rear segment including first reservoir having rupturable front end; tubular middle segment including second reservoir having rupturable rear and front ends; tubular front segment including rear end and forward-projecting porous applicator. Rupturing member near adjacent ends of first and second reservoirs for rupturing both when first and second segments are engaged. Rupturing member near front end of second reservoir for rupturing same when second and third segments are engaged. Alternative rupturing members: double-ended between first and second reservoirs and single-ended attached to third segment; double-ended within second reservoir; single-ended within first reservoir and single-ended attached to third segment. Segments threaded for endwise engagement to seal segments and rupture reservoirs. Fluids mixed and dispensed through applicator.

A linear motion guide device includes a slider slidably attached onto the guide rail, a ball bearing device disposed between the slider and the guide rail, and a lubricating device having a housing slidably attached onto the guide rail for receiving and for supplying a lubricant to lubricate the ball bearing device. A lubricant-conveying member is disposed in the housing and has an upper segment and one or more lower segments and one or more middle segments coupled between the upper segment and the lower segments for absorbing the lubricant even when the lubricant is below a lower level and even when the housing is tilted or turned up side down relative to the slider and the guide rail.

The invention discloses a visual position-pose measurement method based on point-line combination characteristics, which belongs to the technical field of computer vision measurement and relates to a method applicable to measurement on the position and pose of a split-type cylinder-like object moving at high speed. The surface point-line combination characteristics of the cylinder-like object moving at high speed are acquired by a binocular visual system; a target axis and a local coordinate system can be obtained through five steps of calibrating by a high-speed camera, segmenting a point-line characteristic image, extracting characteristic marks, matching the characteristic marks, and acquiring the position and the pose, and then target position-pose information is acquired according to the target axis and the local coordinate system; the point-line combination characteristics consists of circle reflection marks with two axes respectively formed at the front segment and the rear segment of a target object coinciding with target axes, and four point reflection marks which are uniformly distributed at the circumference of the middle segment of the target object and are restrained from different distances to the circle at the front end. The problems that the axis of the cylinder-like object is not easy to acquire, the precision of the acquired axis is low, and the surface mark can not be precisely positioned due to the repeated assembly of the split-type object are solved by utilizing straight-line characteristics of strong anti-noise capacity and large information amount which are matched with point characteristics.

The invention relates to an ultra broadband dual polarization low frequency oscillator unit and a multi-frequency-range array antenna. The ultra broadband dual polarization low frequency oscillator unit comprises an oscillator, a pedestal plate, a feed needle and radiation arms, wherein two end of the oscillator are respectively connected with the pedestal plate and the radiation arms; the feed needle is arranged on the oscillator; the oscillator includes four oscillator sheets which are clamped orthogonally; corresponding grooves and bosses are respectively arranged at the center of the blades of the adjacent two oscillator sheets; any two non-adjacent oscillator sheets can be parallel to each other through clamping of the bosses and the grooves; the number of the radiation arms is 4; every two radiation arms are arranged orthogonally; a fine copper foil and a crude copper foil cover the surface of two ends of each radiation arm; the fine copper foils and the crude copper foil are respectively equivalent to the inductance and the capacitance under high frequency; and the middle segment of each radiation arm is also provided with a double-faced copper foil with a through hole. As the oscillator arm with a resonance circuit is used, the influence of existence of a low frequency oscillator on a high frequency oscillator directional diagram is eliminated; the irrelevance of the antenna wave beam is improved; and the overall performance of the antenna is improved so that the antenna can be miniaturized.

The invention discloses a dual-loop DLL-based three-segment type high-precision time-to-digital conversion method and circuit. According to a measured time segment, a high-middle-low combined segmental type quantization method is adopted. A high-segment bit counting type quantizer in three-segment type TDC (time-to-digital conversion) is driven by a high-frequency stabilizing clock which is inputted from the outside, so that a wide-range stable distance measuring range can be realized; a middle-segment bit TDC is formed by a first DLL voltage controlled delay chain; high-segment bit subdivision can be realized through an asynchronous sampling mode, and repeatable uniform phase distinguishing can be accomplished in a stable clock period; a phase position at a termination time point is decoded, so that a middle-segment quantization function can be accomplished; and according to quantization errors generated by time-to-digital conversion in a middle-segment bit, error time is extracted, a low-segment bit accomplishes further quantization processing, and therefore, higher measurement precision can be realized.

An adjustable hairpiece includes a hairpiece network with a flexible perimeter member having network ports, for fitting around the head of a wearer, the perimeter member having a forward segment and two side segments; two longitudinal guide lines each having network ports, the longitudinal guide lines having guide line forward ends secured to the forward segment and extending rearwardly, the longitudinal guide lines being laterally spaced apart from each other and defining a hairpiece top region and two hairpiece side regions; a flexible network draw line having a draw line middle segment located substantially between the longitudinal guide lines and dividing the network draw line into two draw line half segments, each half segment extending from the draw line middle segment across the top region forwardly and rearwardly in a spaced and repeating spiral crossing sequence while spiraling through ports alternately in the forward segment and in the given longitudinal guide line on the corresponding side of the hairpiece, and then each guide line half segment repeatedly crossing the corresponding side region in a spaced and repeating spiral crossing sequence through ports in the corresponding side segment and in the corresponding longitudinal guide line, the draw line half segments each terminating in a half segment free end; and a quantity of hair strands for securing to the hairpiece network; so that pulling the half segment free ends away from the network causes the draw line to contract the hairpiece against a wearer scalp.

A cruciform buckling restrained brace with transverse partition double-layered bushing is provided. The core steel brace has a cruciform cross section, and comprises a middle segment (buckling segment) as major body with a smaller width, two distal end segments (extension segments), a transition segment between the buckling segment and the extension segment, and a transverse partition arranged in the middle of the buckling segment. Outer restraining steel bushings are positioned respectively at two sides of the transverse partition. An inner steel bushing is arranged between the outer restraining steel bushing and the core steel brace and has a cruciform cross section. The space between the inner steel bushing and outer restraining steel bushing is packed with fillers. An anti-adhesion material is coated tightly on the surface of the buckling segment and transition segment of the core steel brace, with a gap between the anti-adhesion material and the inner steel bushing and filled with a compressible material. The invention has the advantages of simple structure, low fabrication cost, suitability for streamline production, and wide application in high-rise buildings, towering buildings, and highway and railway bridges. The invention helps to increase the structural rigidity, improve the capacity of energy dissipation of the whole structure, and prevent earthquake disaster.

The invention discloses a segmented mining method which comprises the following steps: (1) segmenting an ore body into a panel and middle segments, dividing the panel into ore blocks, dividing the ore blocks into rooms and space pillars, dividing the ore body into middle segments along a height direction of the ore body and dividing each middle segment into sections, wherein the height of the middle segments is 50 to 60 m, the height of the sections is 14 to 20 m, the length and the width of the ore blocks are 80 to 100 m and 30 to 60 m respectively, the length and the width of the rooms in the ore blocks are 60 to 80 m and 15 to 30 m respectively, and the width of the ore pillar is 15 to 30 m; (2) stoping the units of the rooms: a step of stoping by using a segmented open-stope method and ore drawing by using a manner of bundle-hole combined funnel blasting; (3) cementing and filling mined rooms; (4) stoping the units of the space pillars, wherein stoping of a unit of the space pillars is carried out after stoping, cementing and filling of adjacent units of the rooms at two sides of the unit of the space pillars is finished; and (5) filling mined space pillars with water and sediment. The mining method can be used for large scale high efficiency mining of plateau ores.

The invention relates to an adaptive segmentally controlled tunnel illumination control system and method; the system comprises a tunnel illumination controller, a signal detection unit, a Zigbee network unit, and a plurality of illumination lamp sets; the signal detection unit comprises a vehicle sensor, a vehicle speed sensor, a brightness sensor, a temperature sensor, and a raindrop sensor; the Zigbee network unit comprises Zigbee main node module connected with the tunnel illumination controller, and a plurality of Zigbee node modules respectively connected with the illumination lamp sets; the illumination lamp sets comprise an introduction segment lamp set arranged outside the tunnel, an illumination lamp set arranged in the entrance segment in the tunnel, a transition segment illumination lamp set, a middle segment illumination lamp set, an exit segment illumination lamp set, and a road lamp illumination lamp set arranged outside the tunnel, and also comprise an emergency illumination lamp set. The adaptive segmentally controlled tunnel illumination control system can realize tunnel illumination, satisfies illumination curve demands of human eyes, thus eliminating black frame, black hole and white hole effects.