1142results about How to "Guaranteed positioning" patented technology

This invention relates to oligonucleotides comprising a molecular switch which may exist in an “open” or “closed” position. The molecular switch portion of the probe is particularly sensitive to the identity of sequences complementary to the molecular switch. Oligonucleotides containing a molecular switch are applicable to all kinds of hybridization processes. Due to the sensitivity of the switch domain of the oligonucleotide, probes containing a molecular switch are particularly useful in the identification of single point mismatches. More specifically, a portion, but not all, of the oligonucleotide becomes unbound from a mismatched target. The invention further relates to methods of using said oligonucleotides for research reagents, and clinical diagnostics. An exemplary oligonucleotide comprises a first hybridizable domain, a second bridging block domain, and a third binding domain.

The invention belongs to the field of treatment of medical images, and relates to a breast neoplasms ultrasonic image segmentation method based on improved level set algorithm. The method is characterized in that the original image is pre-treated and remains the effective area, the speckle noise is removed, so as to achieve the purpose of protecting the boundary; the image is adaptively segmented according to the threshold. The method comprises the steps of (1) inversing color for the image; (2) determining the threshold; (3) screening candidate areas; (4) arranging the rest candidate areas; (5) determining seed points. With the adoption of the method, the seed points can be quickly found, the seed points can be kept in a neoplasms area, and the accurate determination of the seed points ensures the accuracy of area growth and level set; in addition, the seed points grow in the area, and the initial contour can be found; the classic Chan-Vese (CV) algorithm is improved; the global statistics information of the curved line of the contour in the development process is considered during calculating the global statistics information; the accuracy of the segmentation result is ensured, and moreover, the automation level of the segmentation method can be further improved.

The invention discloses a delaunay-triangulation-network-based multi-redundancy network RTK atmospheric error interpolation method. A network RTK data processing center constructs a Delaunay triangulation network based on a correct coordinate of a CORS base station; after a user is accessed to a data processing center, an optimal triangular unit and a suboptimum triangular unit of the location of the user are selected; an atmospheric error interpolation base line number is extended; an MLIM ionized layer interpolation model and an RELIM tropospheric interpolation model are established; and an atmospheric interpolation completeness monitoring method of a moving station in a grid is provided. The interpolation precision of the MLIM ionized layer interpolation model is higher than that of the traditional model by three times and the interpolation precision of the RELIM tropospheric interpolation model is higher than that of the traditional model by 6 to 30 times; and the two models can still have high interpolation precision at an area with a large elevation difference at the base station. A regional CORS ionized layer and tropospheric completeness index can reach a centimetre-level interpolation precision, so that real-time positioning completeness monitoring of a network RTK user can be realized. With the method provided by the invention, a CORS base station around a user can be utilized fully; the atmospheric delay interpolation precision of the area can be improved; and the rapid and high-precision positioning of the user can be guaranteed.

The invention discloses a substrate positioning method suitable for a screen printing technology, which comprises the following steps of: adsorbing a substrate on the surface of a printing worktable; scanning by using an upper visual optical device to obtain the relative position of a reference mark of the substrate and a reference mark on the surface of the printing worktable; moving the substrate with the printing worktable until the substrate is below a printing screen frame, and scanning by using a lower visual optical device to obtain the relative position of the reference mark on the surface of the printing worktable and a reference mark of a screen; performing coordinate conversion to obtain a relative position relationship of the reference mark of the substrate and the reference mark of the screen because the reference mark on the surface of the printing worktable is scanned in two-time scanning, and performing fine adjustment on the screen frame; and printing when the substrate and the screen are completely aligned. The method is suitable for screen printing on a surface mount technology production line, electrode screen printing on a solar cell production line, and a similar production process for coating the surface of the substrate by using a scraper on the basis that the screen and the substrate are accurately aligned.

The invention discloses a limited bracket construction method of a large-span S-shaped steel box girder. The steel box girder comprises 14 small sections of prefabricated steel box girders; and the 14small sections of prefabricated steel box girders are assembled into seven large sections at a construction site, and then the seven large sections are hoisted and fixed. The construction method comprises the following specific steps of: prefabricating and assembling the steel box girders, constructing temporary brackets in water, hoisting and positioning steel box girder section blocks, connecting steel box girder interfaces, constructing closure sections and welding the collar extension of the steel box girders. According to the limited bracket construction method, a prefabricated assemblymode is used during construction; a floating crane is used for assembly, so that the occupation and pollution of a water area under a bridge are reduced; the parallel operation of multiple processes speeds up the construction progress and shortens the construction period; the temporary brackets are arranged only at circular seams of large-section girder joints; and the brackets occupy small space,thereby facilitating the navigation under the bridge in the construction state and reducing the influence on the navigation under the lake-across construction bridge and surrounding social environments.

The invention belongs to the fields of micro-nano mechanics and precision machinery, and in particular relates to a uniaxial two-way micro mechanical measurement device and method for a scanning micro environment. According to the device, symmetrical coordinate type three-dimensional coarse-tuning translation stages, symmetrical fine-tuning three-dimensional moving precision platforms and a sample platform are installed on a main support unit. Through the control operation of a control system and a manipulation unit, the device can be used for detecting micro-nano characteristic scale materials and a structural mechanical property, and can realize one-way centering stretch, compressing, bending and vibration measurement and micro-nano scale sample surface deformation and micro-structural evolution detection. The device can be repeatedly used and can combine a digital image/speckle correlation technique, an image processing technique or a micro-labeling technique to detect the in-situ deformation and mechanical property of samples in a high-spatial-discrimination scanning microscopic environment.

The invention discloses a measurement method and a measurement instrument of a revolution body part, wherein the measurement instrument comprises a base, a vertical post and an optical measurement head, wherein the vertical post is fixed on the base; the optical measurement head is movably assembled on the vertical post through a vertical orientation mode; a working platform which is used for placing and revolving a part is correspondingly arranged on the base below the optical measurement head; the working platform comprises a revolution platform and an angle displacement regulating platform which are arranged from bottom to top; the angle displacement regulating platform comprises a first angle displacement platform and a second angle displacement platform which respectively comprise a first deflection platform and a second deflection platform; and the deflection axes surrounded by the first deflection platform and the second deflection platform in rotation are vertical mutually and are both parallel to a plane of a light curtain of the optical measurement head. For the angle displacement regulating platform in the measurement instrument provided by the invention, by adopting the deflection surrounding the deflection axes parallel to the plane of the light curtain of a parallel light source through driving the two angle displacement platforms respectively by the revolution driving mechanism, the cross coupling regulation of the deflection angles of the working platform is realized, the space posture of a workpiece can be captured accurately, and the accurate positioning and measurement to the part are ensured.

A welding and positioning tool platform for an aluminium alloy template comprises a working platform supported on a frame body, at least one lateral positioning and pressing device arranged on the platform surface of the working platform, a longitudinal positioning and pressing device arranged at one end of the platform surface in the length direction, a positioning backing plate arranged in the length direction of the platform surface and located on one side of the platform surface, duplex overturning mechanisms close to the positioning backing plate as well as two single overturning mechanisms located at two ends of the platform surface in the length direction separately; multiple transverse supporting ribs are arranged on the platform surface at intervals in parallel; the positioning backing plate is used for positioning a to-be-welded aluminium alloy template main body; the at least one lateral positioning and pressing device presses the to-be-welded aluminium alloy template main body transversely; the longitudinal positioning and pressing device presses the to-be-welded aluminium alloy template main body in the length direction; the duplex overturning mechanisms are used for positioning and pressing to-be-welded transverse ribs; and the two single overturning mechanisms are used for positioning and pressing two to-be-welded gland plates separately. The platform is accurate in positioning, simple to operate and convenient in welding.

The invention discloses an in-pipe walking robot. The in-pipe walking robot comprises a running mechanism, a connecting rod assembly and a universal connecting mechanism connected with the running mechanism and the connecting rod assembly. The running mechanism comprises a transmission mechanism, a first pressure spring, two road wheels and two rocker connecting rods. The connecting rod assembly comprises a center rod, a front locking block, a rear locking block, a sliding block, at least two pairs of connecting rod slices, at least two pulleys and a second pressure spring. According to the in-pipe walking robot, the synergistic effect of worm gears, a worm and the first pressure spring is adopted, the close fit of the worm gears and the worm is retained, and the road wheels are made to roll on the inner wall of a pipe in a tightly attached mode. When the worm is in a shape of a taper or a circular truncated cone, the running mechanism can automatically adjust the interval of the worm gears in pipes with different diameters, so that the road wheels are ensured to make contact with the inner wall of the pipe all the time and the adhesive force is retained; due to the second pressure spring, the symmetrical pulleys are always pushed by the sliding block to make contact with the inner wall of the pipe, so that a flange plate is ensured to be positioned on the central axis of the pipe all the time, and an operating mechanism externally connected with the flange plate can run with the flange plate steadily.

The invention discloses a room temperature shim coil of a superconducting NMR spectrometer. The room temperature shim coil is formed by a winding region, a support frame, and a base from top to bottom in sequence. The inner layer of the winding region is axial coils, and the outer layer is radial coils. On the manufacturing method for a coil structure, the multiple order axial coils are compressed on a same cylinder to improve space utilization rate, and a winding method of self-bonding enamelled wires and PET films (also named as high-temperature polyester film) is used, so as to solve technical problems of wire positioning and fixing in a winding process of the room temperature shim coil. An optimization function is also designed and established aimed at an algorithm of the shim coil, and a problem of design of the room temperature shim coil is converted to a problem of solving the minimum value of the optimization function, and then through a particle swarm optimization, the functional equation is solved, and finally position distribution and number of turns of the coils can be calculated. According to the room temperature shim coil, reliability and adaptability of the shim coil can be obviously improved.

The invention discloses an arc glass edge grinding machine. The arc glass edge grinding machine comprises a box body, positioning suction cups and a grinding mechanism. The positioning suction cups are connected with the box body through a first cantilever. The other end of the first cantilever is connected with a second cantilever in a rotating manner. The end of the second cantilever is connected with a grinding mechanism. The grinding mechanism comprises an arc-shaped supporting frame, a fixed box, a positioning buckle plate and a first motor. The top end of the arc-shaped supporting frame is connected with the fixed box. The positioning buckle plate is arranged on the side face of the fixed box. The first motor is limited by the positioning buckle plate. A second motor, a hydraulic oil tank and a draught fan are arranged in the box body. An air inlet pipe and an air outlet pipe are arranged on the draught fan. The arc glass edge grinding machine is simple in structure and high in practicability, can conduct edge grinding on arc-shaped edges of conventional glass and can conduct arc edge grinding on glass of different sizes as well, the stability of glass during edge grinding is improved, glass uniformly bears force, the service life of the edge grinding machine is prolonged, and economic benefits are remarkable.

The invention provides a target classification and positioning method based on network supervision. The target classification and positioning method comprises the following steps: automatically obtaining a large amount of network image data from a search engine according to the category of a to-be-tested target; filtering to remove noise images to form a training sample set; preliminarily constructing a classification and positioning network; and inputting samples in the training sample set into the preliminarily constructed classification and positioning network to perform feature extraction,classifying the features, obtaining position information of the target object, and training the classification and positioning network. According to the end-to-end fine classification and positioningmethod based on network supervision, massive network images easy to obtain are used as a training set, manual annotation is completely removed, only image-level labels are used, an efficient convolutional network is designed, and algorithms such as global average pooling and class activation mapping graphs are fused, so that the performance of the method exceeds that of a weak supervised learningmethod on fine classification tasks and positioning tasks.

The invention discloses a rotary chuck which comprises bearing pedestals, a cylindrical roller bearing, a roller core, a lock disc, coil springs, clamping jaw blocks, first pin shafts, clamping jaw mats, a second pin shaft and a stopping lock. The roller core is fixed in the bearing pedestals through the cylindrical roller bearing, and a through hole allowing a workpiece to penetrate is formed in the roller core. The rear ends of the clamping jaw blocks are fixed to the front end of the roller core, and the clamping jaw blocks rotate with the second pin shaft as the axis. The second pin shaft is a hinge shaft of the roller core and the clamping jaw blocks, the coil springs for keeping the clamping jaw blocks expanding outwards are arranged on the second pin shaft, and the front ends of the clamping jaw blocks are hinged to the clamping jaw mats through the first pin shafts. The lock disc is in threaded connection with the roller core, and the clamping jaw blocks are driven to rotate around the second pin shaft through mutual movement of the lock disc and the roller core. The stopping lock capable of fixedly connecting the bearing pedestals and the roller core is arranged on the bearing pedestals. According to the rotary chuck, the pipe machining operating speed is greatly improved, and the rotary chuck is a great contribution to the social machining and manufacturing industry.

The invention belongs to the field of automatic library management, and discloses a books management method and a books management system based on a space coordinate positioning technology. The system is characterized by comprising a control portion and an executing portion, the control portion comprises an image processing module, a wireless transmitting module, a human-computer interface, a decision-making module and a database, and the executing portion comprises a wireless receiving module and an executing robot. In the control portion, the image processing module is connected with the decision-making module, and the decision-making module is connected with the wireless transmitting module, and is simultaneously bi-directionally connected with the human-computer interface and the database. In the executing portion, the wireless receiving module is connected with the executing robot. The wireless transmitting module of the control portion is connected with the wireless receiving module through a wireless technology. By the system, library management automation and intelligentization are achieved, and library management reliability is improved.

The invention discloses an assembling positioning jig which is used for installing a protection screen of a display on a display front frame and comprises a machine frame and a pressing device. The assembling positioning jig is high in positioning accuracy and accurate in installation and achieves mechanical automation.

This massage head is fitted with a case defining an internal chamber in which a skinfold is formed when it is applied to the skin of a patient. The fold presses against the lower edges of the chamber, which is defined by two lateral walls and by two transverse walls The transverse walls each include a clack valve able to be driven in a pivoting motion, so as to cause the lower edges of the clack valves in contact with the skinfold to come closer together or move further apart. The relative displacement of the clack valves is ensured by of a motorized rotary cam provided in the massage head. The cam defines a cam path engaging with a component associated with the clack valves, and able to cause the swivelling motion thereof.

The invention discloses a system and a method for the high-precision measurement direction sensing and rotary positioning of relative micro-rotation between two planes. Two gratings are arranged on the two planes to form two groups of measurement grating pairs. When the amount of relative rotation between the two planes is zero, grid lines of all gratings are in the same direction. Two groups of measurement grating pairs are opposite in the size relation of grating size but identical in period ratio. The number of fringes acquired by a measurement system is not less than 40. The method for measurement direction sensing and rotary positioning comprises the following steps of adopting the dimensions of fringe inclination angles obtained in the horizontal-vertical direction and two diagonal directions to obtain the directions of the fringe inclination angles. When two groups of interference fringes are identical in direction, rotary zero-point positioning is realized between the two planes, and when two groups of interference fringes are different in direction, relative rotation amount exists between the two planes.

An actuator comprises an actuator shaft mounted for rotation by a drive shaft, releasable lock means operable to restrict axial movement of the actuator shaft relative to the drive shaft, and an output member co-operating with the actuator shaft such that rotation of the actuator shaft drives the output member for translating movement relative to the actuator shaft.

The invention discloses a retrofit technology for cutting and lengthening ships via a dry-type trolley method. The technology is carried out by prefabricating newly-added sections by sectioning, arranging docking blocks, drawing lines on a ship body, strengthening the structure of the ship body, and cutting by sectioning. The technology comprises the following main steps of: controlling the docking precision of the ship; paving a combined-type rail, connecting and putting a combined trolley; precisely lying the ship on a keel block after the ship docks; arranging a thrust device; adding supports at the front end of a bow section and the rear end of a stern section of the ship; displacing the bow section; assembling the newly-added sections and folding the newly-added sections with the stern section; and precisely aligning, locating and folding the bow section with the newly-added sections. The technology is suitable for cutting and lengthening ships in any mold lines and tonnages and has the advantages of rapid folding speed, high firmness safety, simple and reliable process operation, short retrofit period and low cost. The folding and locating precisions are high, so that the precise displacement and aligned location of the bow section are effectively guaranteed and the folding precision reaches the level of a newly-constructed ship. On the other hand, the technology is less affected by the change of exterior environment factors such as weather, which is beneficial to the control of the docking period in enterprises.

The invention discloses a 3D (Three Dimensional) printer capable of changing spraying heads for printing. The 3D printer comprises a material feeding device, a heating and clamping device (1), a driving device, a positioning device, a base (5), spraying heads (10) and a control system, wherein the heating and clamping device comprises a heating device and an electromagnet; a material inlet (7) is formed in the top part of the heating and clamping device; the driving device comprises a driving motor (2) and a driving gear (3); the positioning device comprises a positioning motor (6) and a positioning pin (9); the base is provided with material outlets, positioning holes and a rack of which the two ends are provided with position switches (4); the base is connected with the heating and clamping device; the spraying heads comprise a spraying head I and a spraying head II; and the control system is connected with the material feeding device, the driving device, the positioning device and the spraying heads. According to the 3D printer disclosed by the invention, the free change of the spraying heads is realized; processing materials with different diameters are sprayed at different working conditions; the processing efficiency is improved; the raw materials are saved; the production cost is lowered; meanwhile high-precision change of the spraying heads is realized through the positioning device; and the processing precision of parts is improved.