99results about How to "Shorten the space distance" patented technology

The invention relates to a genetic-algorithm-based trajectory planning optimization method for a mobile mechanical arm. According to the technical scheme, the method comprises the following steps of first establishing a forward kinematic model and an inverse kinematic model of a multi-degree-of-freedom mobile mechanical arm; then fitting a joint trajectory by adopting a composite curve of a quartic polynomial mathematical model and a quintic polynomial mathematical model, and calculating solutions of the corresponding mathematical models according to a linear constraint equation; next selecting a trajectory optimization target according to the principles of shortest motion time, minimum spatial motion distance and less than or equal to maximum set joint torque of the mobile mechanical arm; and finally globally optimizing the optimization target by utilizing a genetic algorithm to obtain an optimal trajectory curve of an end actuator of the mechanical arm. According to the method, the trajectory planning efficiency and the tracking accuracy of the mechanical arm are improved, and the problems of real-time trajectory planning of the mobile mechanical arm and trajectory planning optimization and control of the mechanical arm in an uncertain environment are also solved; and the trajectory planning optimization method for the mobile mechanical arm is effective.

The invention provides a high-precision method for measuring the attitude angle of a triaxial air bearing table and a measurement device thereof. The measurement device is characterized in that: a guide rail and a window shade are arranged at the perimeter of the bottom of the triaxial air bearing table, an artificial illumination system is arranged on a liftable platform, the guide rail of the bottom of the triaxial air bearing table is used for installing the window shade, a marker is fixed on the bottom surface of the table facet of the triaxial air bearing table, a digital CCD camera is arranged on the liftable platform. The measurement method comprises the following steps: marking the digital CCD camera; collecting the images of the marker and transmitting to a computer which is responsible for image processing by the digital CCD camera; carrying out sub-pixel positioning on the mark point on the marker, and acquiring the precise coordinate of the mark point in the image; and calculating the relative attitude angle between the marker and the digital CCD camera. The measurement device has the advantages of simple installation, and high measurement precision, and can complete the high-precision attitude measurement of the air bearing table. The invention also can be used for the precision measurement of a uniaxial air bearing table.

A dual directional coupler includes a housing, a main conductor, a forward coupled conductor and a reverse coupled conductor. The main conductor, the forward coupled conductor and the reverse coupled conductor are arranged in parallel within the housing such that the main conductor and the forward coupled conductor define a first two section quarter wave directional coupler, and the main conductor and the reverse coupled conductor define a second two section quarter wave directional coupler.

The invention pertains to an assembly cell (1; 21, 22) that is suitable for the assembly of modules (55) from work pieces (35) on pallets (33; 42, 43; 54; 68, 69) and features several pallet stations (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h), in which pallets can be positioned, wherein at least some of the pallet stations are realized in the form of assembly stations for carrying out assembly work on the modules on the pallets., and with at least one transport device for transporting the pallets between the pallet stations. The invention is characterized in that the transport device is realized in the form of a triaxial module (2; 23, 24) that is able to transport an individual pallet from any pallet station within the assembly cell to any other unoccupied pallet station within the assembly cell. The invention therefore makes available an assembly cell, by means of which modules can be assembled independently of the spatial arrangement of the assembly stations, wherein said assembly cell requires fewer pallets and makes it possible to realize a faster transport of the pallets from assembly station to assembly station.

The profile of waste bamboo material is prepared with bamboo powder 40-70 wt%, plastic resin 20-40 wt%, nanometer level calcium carbonate 5-15 wt%, fire retardant 1-5 wt%, antiager 1-3 wt%, lubricant 2-4 wt% and brightener 1-3 wt%. The preparation process includes the following steps: drying waste bamboo material to water content of 6-10 wt% and crushing to 100-400 mesh; mixing materials in the said proportion and blending in a blender at 150-180 deg.c for 15-20 min; extruding in a double screw extruder and cooling to form. The present invention has low cost, rich material source and simple preparation process, and the profile has high compactness, excellent mechanical performance and other advantages.

A friction stabilizer having tabs comprising a tubular body comprising an exterior surface and having a first portion and having a second portion provided with a taper. The first portion has an impact end and the second portion has an insertion end. A tab is on the tubular body and extends outward from the exterior surface of the tubular body in a direction toward the impact end and away from the insertion end of the tubular body. The tabs can be rectangular shaped or triangular shaped or have other shapes which prevent the friction stabilizer from being removed from a drilled bore in a mine. When the friction stabilizer with tabs is inserted into a drilled bore in a mine, the tabs do not impede insertion. But, after insertion into the drilled bore the tabs resist removal of the tubular body, and thus allow the stabilizer to support the mine wall or ceiling. The friction stabilizer is made by taking a steel coil and punching the shape of the tabs in the metal, for example sheet metal, unrolled from the coil. A notch is also punched into the sheet at a predetermined location. Rolling die roll the tubular body, and a cutting machine cuts the tubular body at the notches, so tubular bodies of predetermined length are cut. The tabs extend from the exterior surface of the tubular body due to the natural spring constant of the steel or metal from which the tubular body is made. A weld ring is welded to the impact end and has a weld ring gap space. In another embodiment the tubular body has first portion, a second portion with a bent portion joining them together. An extendable tab is formed in the first portion proximal the bend portion and the extendable tab is diametrically opposite a tube gap space.

The invention discloses a design and construction method for adjacent new construction or simultaneous construction of a bridge and a subway tunnel. When the clear distance between the line positionsof the left subway tunnel and the right subway tunnel is 8.6-13.5 m, a bidirectional framing type section bridge or a bidirectional whole-width type section bridge is adopted as the bridge. One one-way single-width bridge or the two-way whole-width section bridge in the two-way framing type section bridge spans one subway tunnel through a transverse single-span frame beam. The structural center line of the one-way single-width bridge or the two-way whole-width type section bridge is aligned with the structural center line of the crossed subway tunnel, the other subway tunnel crosses underground from the side of the bridge, and the minimum horizontal safe clear distance between the crossed subway tunnel and the adjacent bridge pile foundation is controlled to be 2-4 m. The bridge and the subway tunnel span each other (cross) in the space, it is guaranteed that the spatial distance between the bridge and the subway tunnel reaches the minimum when the bridge and the subway tunnel span each other or cross each other, and mutual safety of structural bodies of the bridge and the subway tunnel is guaranteed through various comprehensive measure methods.

The invention provides an entity recognition method and device, equipment and a storage medium. The method comprises the steps of obtaining original threat intelligence texts; for each original threat intelligence text, marking each segmented word in the original threat intelligence text according to the entity type of the entity to which the segmented word belongs to obtain a training sample; and inputting the training sample into an entity recognition model, and training the entity recognition model by using each segmented word in the training sample and the entity mark corresponding to the segmented word to obtain a trained entity recognition model, wherein a loss function used by the entity recognition model in the training process is used for reducing the spatial distance between segmented words with the same entity mark and increasing the spatial distance between segmented words with different entity marks; and inputting to-be-recognized threat intelligence texts into the trained entity recognition model to obtain an entity recognition result. The recognition accuracy of specific types of entities in the threat intelligence field can be improved.

Disclosed are a short-distance optical amplification module, method and system. The module comprises a reflective type polarizing plate, a first phase delay plate, an imaging lens, a second phase delay plate and an absorptive type polarizing plate, arranged successively. The reflective type polarizing plate is arranged on a transmission path of an optical image. The first phase delay plate is arranged on the transmission path of the optical image passing through the reflective delay plate. The imaging lens is arranged on the transmission path of the optical image. The second phase delay plate is configured for converting a polarization direction of the optical image from an elliptical or circular polarization direction to a second linear polarization direction. The absorptive type polarizing plate is arranged on one side of the second phase delay plate that faces away from the imaging lens.

The invention discloses a fertilizing method for apricot trees. The fertilizing method comprises the following steps: (1) measuring soil nutrients, namely, arranging a plurality of sampling points under a plurality of fruit trees in an orchard, taking soil samples at depths of 0-20cm and 20-80cm from any sampling point, mixing the soil samples at the same sampling layer of the same fruit tree, airing, measuring organic matters, total nitrogen, rapidly available nitrogen, available phosphorus, rapidly available potassium, exchange calcium, exchange magnesium, available sulfur, zinc, iron, manganese, copper and boron in the sample, and carrying out statistic analysis on dependency of data of the soil samples at the two layers; and (2) according to the statistic analysis result on dependency of data of the soil samples at the two layers, by taking nutrients having significant differences as base fertilizers, applying the fertilizers with alternative deep placement and shallow placement every other year, dividing nutrients without significant differences as base fertilizers and additional fertilizers, and fertilizing by adopting a manner of combining deep placement of the base fertilizers and shallow placement of the additional fertilizers. According to the fertilizing method provided by the invention, by considering movement abilities of different nutrients, the time and spatial distances from application of the nutrients to nutrient absorption of roots are shortened, the benefits are obvious, and the operation is simple.

The invention discloses a plastic thin film opening and flattening device and a plastic thin film online side cutting and flattening method, and relates to the technical field of plastic thin film production processing. The plastic thin film opening and flattening device comprises a hopper, an extruder, a mould, a herringbone clamp plate, a traction roller, a horizontal cutting frame, a guiding roller, a triangular frame body, traction rollers, a horizontal cutting frame, a guiding roller, a triangular frame body, involute guide rollers and a coiling device. A horizontal side cutting mechanismis arranged on an operation platform of the traction roller, and comprises a horizontal slide rod and a tool rest sliding chute with a cutter; the cutter is used for unilaterally cutting a cylindrical film extruded through the traction roller into a single cutting film; after passing through the guiding roller, the single cutting film enters the involute guide rollers under the guiding roller soas to form a thin film through the involute guide rollers; and a thin film opening and flattening mechanism is connected under the involute guide rollers. According to the plastic thin film opening and flattening device and the plastic thin film online side cutting and flattening method provided by the invention, in the process of opening and flattening a thin film, the friction forces of a film surface and arc-shaped opening rods are uniform, the thin film is not easy to scratch, and the occurrence of the phenomenon of gauffer and the problem of multiple creases caused by the imbalance of friction forces of various points of a middle cutting type trapezoid display rack are avoided.

The invention discloses a compact circular waveguide TM01-TE01 mode converter, and aims to provide the mode converter from a circular waveguide TM01 mode to a circular waveguide TE01 mode, wherein the mode converter has a compact structure, and the input and the output of the mode converter are on the same straight line. The mode converter mainly comprises an input circular waveguide (1) for propagating the TM01 mode, an output circular waveguide (5) for propagating the TE01 mode, N rectangular E-surface 90-degree bending waveguides (2), N rectangular 90-degree twisted waveguides (3) and N rectangular H-surface 90-degree bending waveguides (4), wherein N is an even number greater than 3. According to the mode converter, the two circular waveguides for propagating the TM01 mode and the TE01 mode separately are coaxially arranged; the adjacent one surfaces on the inner sides of the two circular waveguides are short-circuit surfaces; the two circular waveguides are in coupling connection through a series of rectangular waveguide assemblies with even-number columns, wherein the rectangular waveguide assemblies are connected in sequence, and the side faces of the rectangular waveguide assemblies are arranged at the equal intervals; the mode converter is compact in structure, small in size and light in weight; the mode converter adopts an axial symmetrical structure, and the input and the output are arranged on the same axial line, so that the mode purity of the output TE01 mode is improved.

The invention provides primers, a probe, a kit and a detection method for type II nucleic acid quantitative detection of herpes simplex virusherpes simplex virus. The primers are as shown in the sequences of SEQ ID NO: 1 and SEQ ID NO: 2; the probe is as shown in the sequence of SEQ ID NO: 4, and a reporter fluorescent group and a non-quenching fluorescent group are marked at the two ends of the probe, respectively; the kit comprises the primers and the probe. The primers, the probe and the kit thereof are low in fluorescent background value, high in signal-to-noise ratio and high in detection sensitivity when used for detecting type II nucleic acid quantitation of the herpes simplex virus.

A zoom lens includes: a first lens group having a negative power; and a second lens group having a refractive power, in this order from an object side. The zoom lens satisfies the following conditional formulae: 1.0<D2g/D1g<1.6, 0.08<D2t/ft<0.19, 1.15≦ft/|f1|<1.8, and 1.1<ft/f2<1.9, wherein D1g is the distance from a most object side lens surface to a most image side lens surface within the first group, D2g and D2t are the distance from a most object side lens surface to a most image side lens surface within the second group and the distance between an object side partial second lens group and an image side partial second lens group when focused on infinity at a telephoto end, respectively, ft is the focal length of the entire system at the telephoto end, and f1 and f2 are the focal lengths of the first group and the second group, respectively.

A liquid crystal display device includes first to fourth pixel electrodes neighbored each other in a first direction, a common electrode at least partially overlapping the first to fourth pixel electrodes, and a first data line and a second data line extended in a second direction different from the first direction, and neighbored each other where the first data line is interposed between the first pixel electrode and the second pixel electrode, the second data line is interposed between the third pixel electrode and the fourth pixel electrode, and at least one slit defined in the common electrode is interposed between the second pixel electrode and the third pixel electrode.

A communications device includes a transmitter, a transmission processing device, a receiver, and a reception processing device. The transmission processing device assigns signal-space points within an I/Q signal space to digital signals, which include data values. The reception processing device assigns data values to signal-space points. The transmitter generates a transmission signal from signal-space points to be transmitted. The receiver determines received signal-space points from a received signal. The individual transmitted and received signal-space points provide in each case a smaller spacing distance from adjacent signal-space points than from the origin of the signal space.

The invention discloses a gas concentration and sensing integrated device and a preparation method thereof. The integrated device comprises a metal-oxide gas sensor, an annular insulating layer, an annular platinum micro-heater, an annular insulating layer and an annular gas concentrator which are successively placed on a silicon wafer and are connected with an electrode, a mesoporous heat-insulation layer covers the silicon wafer, the width of the annular platinum micro-heater is less than or equal to 1 mu m, the thickness is 200-500 nm, and the electrode is electrically connected with the platinum micro-heater and a power supply separately. The method comprises the following steps: repeatedly coating the silicon wafer covered with the mesoporous heat-insulation layer with an electron beam resist; drawing a graph of a corresponding device on the electron beam resist through an electron beam exposure method; and after sputtering or evaporating the corresponding device on the graph, growing the gas concentrator on the annular insulating layer to obtain a target product. The gas concentration and sensing integrated device has the advantages of compact structure, low power consumption, high detection limit, instantaneity and convenience, is quite easily applied to high-sensitivity detection on gas widely, and thus has a wide application prospect in the fields of wearable or embeddable intelligent terminals and the like.