34results about How to "Achieve crossover" patented technology

The invention discloses a batch scheduling method for flexible job shops based on genetic algorithms. The steps of the method are: (1) Determine the operating parameters, including population size M, crossover probability P C , the mutation probability P M , the number of iterations T; (2) Initial population generation, using segmented coding method to generate batch codes and process codes; (3) Individual fitness calculation, taking the reciprocal of the individual’s total completion time as its fitness value; (4) Select Operation, using the roulette selection operator; (5) crossover operation, setting crossover execution criteria, performing crossover on batch codes or process codes according to the criteria, and repairing after crossover; (6) mutation operation, using multiple Point mutation, using reverse sequence mutation for the process code; (7) Termination discrimination, judging whether the number of generations meets the termination condition, stop if it is satisfied, and output the optimal scheduling plan, otherwise go to (3). The invention can optimize the production operation of the flexible workshop, effectively shorten the production cycle, has strong applicability and is easy to popularize.

The invention provides a right-angled rail-type assembly platform for steel structures. The right-angled rail-type assembly platform comprises slide rails and clamping platforms, wherein the slide rails comprise transverse slide rails and longitudinal slide rails; two of the clamping platforms are movably mounted on the transverse slide rails, and the other two clamping platforms are movably mounted on the longitudinal slide rails; each clamping platform comprises a base, a table face and two clamping mechanisms; the table faces are movably arranged at the upper parts of the corresponding bases through turntables, two parallelly arranged slideways are arranged on the upper surface of each table face, and the cross sections of the slideways are of convex structures; every two corresponding clamping mechanisms are arranged opposite to each other, and each clamping mechanism comprises two sliders, a strip-shaped clamp plate and positioning bolts; every two corresponding sliders are mounted in the corresponding two slideways in a sliding manner, the cross sections of the sliders are of I-shaped structures, and the bottoms of the sliders are mounted in the slideways; a vertical plate is arranged at the upper part of each slider; each strip-shaped plate is mounted on the corresponding two vertical plates through two spring shafts arranged at the two ends of the strip-shaped plate; horizontal fixing plates extending outwards are arranged on two sides of each slider; the positioning bolts are arranged on the corresponding horizontal fixing plates and are in threaded match with the corresponding horizontal fixing plates; and horizontal saw teeth are formed in the side surfaces of the strip-shaped clamp plates.

The invention belongs to the technical field of energy, and discloses a gas hydrate accelerant and an application thereof in saline-water desalting and carbon dioxide capturing. The gas hydrate accelerant has active components including dynamic accelerants and thermodynamic accelerants, wherein the dynamic accelerants are more than one kind of amino acid; and the thermodynamic accelerants are more than one of tetrahydrofuran and cyclohexane. The gas hydrate accelerant can be applied to saline-water desalting and carbon dioxide capturing. According to the invention, the amino acid is used as the gas hydrate accelerant, which is nontoxic and harmless, so that induction time of hydrate can be effectively reduced, gas storage capacity and gas storage density of the hydrate can be improved, and seawater can be efficiently separated and desalted, and thus combined application of gas separation and seawater desalting is achieved; THF and the other hydrate are used as stabilizers, so that stability of the gas hydrate can be improved while the formation condition of the hydrate is reduced, and thus industrial operation is facilitated.

The present invention discloses a high-transmission rate, high-return loss and high-isolation photonic crystal optical bridge, and aims to provide a photonic crystal optical bridge which is high in transmission rate and return loss, is convenient to integrate and is efficient. The high-transmission rate, high-return loss and high-isolation photonic crystal optical bridge comprises a photonic crystal with a forbidden band and a photonic crystal waveguide, and also comprises two input ends and two output ends. The two input ends and the two output ends are arranged at the left, upper part, right and lower part of the photonic crystal waveguide respectively, the photonic crystal waveguide is formed by making a photonic crystal vertical waveguide and a photonic crystal horizontal waveguide in crossed intersection in the middle part of the photonic crystal waveguide, and a waveguide defect dielectric cylinder is arranged in a photonic crystal crossed waveguide. Each of the four ports of the photonic crystal waveguide is equipped with two circular defect dielectric cylinders, and a square defect dielectric cylinder is located in the right center of the junction of the vertical waveguide and the horizontal waveguide. Two beams of light signals are inputted from the two input ends of the photonic crystal waveguide respectively, form the light path crossed intersection in a common central area, but are transmitted without the mutual interference, and are outputted from different ports along the straight line directions respectively.

The invention relates to a preparation method of a negative plate of a chemical battery, which comprises the steps of sizing, drying and rolling, wherein the sizing step is continuous, double-side sizing and single-side sizing are operated alternatively, and the single-side sizing is adopted on a surface which has no corresponding positive surface; and that the double-side sizing and the single-side sizing are operated alternatively refers to that the double-side sizing is adopted on a section of the negative plate, the single-side sizing is adopted on a next section, then the double-side sizing is adopted again, and the cycle is repeated.

The invention discloses a tower crane used for a high-stability pipe. The tower crane used for the high-stability pipe comprises a tower body, wherein a rotating table is arranged at the upper end ofthe tower body, a tower top is arranged at the upper end of the rotating table, a balance arm and a cargo boom are oppositely arranged on the two sides of the tower top, a jack mechanism is movably installed on the cargo boom, the jack mechanism comprises a jack box, a winding roller and a first driving device which drives the winding roller to rotate are arranged in the jack box, a pull wire is installed on the winding roller, a pipe clamping mechanism is fixedly connected with an end portion of the pull wire, the pipe clamping mechanism comprises a positioning head connected with the pull wire, clamping devices are arranged on the positioning head, the clamping devices comprise telescoping parts and lifting hooks, the lifting hooks comprise connection heads, first lifting jaws and secondlifting jaws, and the upper ends of the first lifting jaws and the second lifting jaws extend to the upper ends of the connection heads, and are hinged to the lower ends of the telescoping parts separately. By means of the tower crane used for the high-stability pipe, the pipe is fixed, and not only is clamping very convenient, but also clamping is stable.

The invention provides a tension self-adjusting type combined joint for a full-tension crossed cable truss structure, and belongs to the field of large-span space structure design. An upper joint body is composed of a main cable groove, an auxiliary cable groove, a rubber block, a base, a cover plate and a nut A; a lower joint body is composed of an upper cable groove, a lower cable groove, a gasket, a rubber layer, a belleville spring, an anchor plate, an anchoring clamp and a nut B; crossed horizontal inhaul cables can penetrate through the upper joint body and the lower joint body, the main cable groove and the auxiliary cable groove can rotate relatively, the upper cable groove and the lower cable groove can rotate relatively, and the crossed angle of the inhaul cables is adjusted; the upper end of a vertical inhaul cable is fixed to a lug plate of the base of the upper joint body, and the lower end of the vertical inhaul cable penetrates through all the components of the lower joint body and is anchored through the anchoring clamp at the bottom of the anchor plate; and the belleville spring is installed on the lower joint body, the pressure borne by the belleville spring is kept the same as the tension of the vertical inhaul cable all the time, and the cable force in the vertical inhaul cable can be automatically adjusted. The combined joint is simple in structure, easy to assemble, capable of automatically adjusting the cable force of the vertical inhaul cable, convenient to construct and install, high in construction safety degree and low in construction cost.

The invention provides an annular sliding rail suspension type steel structure processing device which comprises an upper annular sliding rail, a suspension mounting frame, a lower bracket and a lower annular sliding rail. By the design of the upper annular sliding rail and the lower annular sliding rail and arrangement of the universal suspension mounting frame, the annular sliding rail suspension type steel structure processing device has the advantages of good universality, use flexibility, small occupied area and the like.

The present invention relates to a method for manufacturing an electronic or electrical system, the method comprising the layer-free production of at least one physical structure (101, 102) which is designed to guide electromagnetic waves, using at least one additively operating apparatus, wherein the layer-free production of the spatial, layer-free structure comprises the simultaneous or sequential application and / or removal of one or more materials in the spatial arrangement, as a result of which the electronic or electrical system is partially or completely formed. The invention further relates to a system which is manufactured in accordance with the method.

Disclosed is a three-dimensional cross type medium pool for a serial laser combination in Brillouin amplification, which relates to a medium pool. The invention aims to solve the problem that to suffice the laser incident beam and the emission beam at two directions is difficult, and to adjust the fine cross and overlapping of the two laser beams in the medium pool is also difficult in the prior noncollinear structure medium pool of the serial laser combination. A first component and a second component of the invention are inter-crossed; a third component and a fourth component are also inter-crossed; the middle part of the first component, the second component, the third component, the fourth component and the fifth component are all communicated with each other. The medium pool of the invention makes the Strokes beam and the pump beam to be perpendicular to the injection window when the Strokes beam and the pump beam are injected into the medium pool, and fulfils a larger cross angle within the limitation of the permitted errors of the wave vector mismatch angle. A plurality of pump beams can interact with the Strokes beam at the same time in a single serial laser combination structure unit. An adjusting beam passing through the medium pool can realizes the cross and overlapping of the beams in the medium pool.

The invention discloses a technology for producing a flower fertilizer by means of metallurgical slag.The method comprises the steps that 50% by weight of iron-smelting slag and 10% by weight of steel slag are subjected to magnetic separation to remove heavy metal compounds; the iron-smelting slag and steel slag are milled through a ball mill till the particle size is 200 meshes, and then the materials are added into a disc pelletizer or a drum pelletizer; 30% by weight of dried domestic sludge is added, mixing and sterilizing are conducted, after mixing and sterilizing are conducted for 8 h, 10% by weight of calcium bentonite is added into the mixture, the materials are mixed and then packed, and the packed materials serve as a chemical fertilizer or nutrient soil of flowers and vegetables, wherein the moisture rate of the domestic sludge is smaller than 3%.

The invention provides a compaction embroidering system for honeycomb porous-structure cotton. According to the system, a finishing device in the system comprises a first embroidering roller, a secondembroidering roller and a third embroidering roller which are arranged in sequence along the transportation direction of a main transportation belt, the three embroidering rollers are all located directly above the main transportation belt, each embroidering roller comprises a roller body and a plurality of embroidering needles evenly arranged around the side wall of the corresponding roller body, the lengths of embroidering needles of the three embroidering rollers are shortened in sequence, the distributed densities of the embroidering needles of the three embroidering rollers are increasedin sequence, the distances between the three embroidering rollers and the main transportation belt are reduced in sequence, the end portions of the roller bodies are provided with rotating driving shafts, the outer side walls of the rotating driving shafts are in transmission cooperation with output ends of rotating driving motors through rotating transmission belts, and the central positions ofthe rotating driving shafts are connected with output ends of lifting motors through lifting ropes. The compaction embroidering system for honeycomb porous-structure cotton have the advantages that not only can thicker and fluffier textile bodies be finished and compacted to provide convenience for the weaving and crossing of the fibers in the textile bodies, but also the sticking efficiency and pulling efficiency are higher, the adjustability is higher, and the application range is wider.

The invention relates to the field of motors, and discloses a motor stator and a motor, and the motor stator comprises a stator core which is provided with a plurality of grooves; a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; wherein at least two branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of the stator core; each branch winding comprises a plurality of connecting parts which are positioned at two axial ends outside the stator core slot; the connecting part comprises a groove outer end part of the first conductor section and a groove outer end part of the second conductor section; each branch winding is provided with a specialconnecting part; the pitch of the special connecting part is different from the pitches of other connecting parts of the branch winding; a completely symmetrical structure is adopted on a magnetic circuit through a winding structure, the problem of circulating current generated by an asymmetric structure is solved, a single conductor section is adopted, little intersection of winding heads is achieved, the manufacturing process is simplified, the production cost is reduced, and the machining efficiency is improved.

The invention discloses a machine furnace deeply coupled thermodynamic system of a thermal power generating unit. The machine furnace deeply coupled thermodynamic system of the thermal power generating unit comprises a boiler, a main flue, a dust remover, an induced draft fan, a desulfurization device and a chimney which communicate with one another sequentially according to a gas flowing direction; the main flue is connected with a bypass flue in parallel; an air preheater is arranged on the main flue; the boiler communicates with a primary air pipeline capable of exchanging heat with an airpreheater; and a waste heat recovering system is arranged on the bypass flue. The machine furnace deeply coupled thermodynamic system of the thermal power generating unit has the following beneficialeffects: according to the scheme, cold air in the primary air pipeline is heated to a certain degree and then is fed into the air preheater, the replaced high-grade high-temperature flue gas enters the bypass flue, the high-temperature flue which is divided to enter the bypass flue heats feed water and condensed water, and higher-grade regenerative heat extraction steam is discharged and enters asteam turbine to apply work, so that cross and gradient utilization of energy is realized, and the power generation efficiency of a coal-fired power plant can be improved better compared with that inthe prior art.

Embodiments of the present invention provide a neighbor node discovery method and system. The method is applied in a sensor network, the sensor network includes a plurality of nodes with limited energy, and the neighbor node discovery method includes: setting the time period of each node; each node according to the time period The specified mode works, the node wakes up in the first wake-up time slot and the second wake-up time slot in the time period, and remains dormant in the other time slots of the time period; the first node and the second node are in one of the time periods Realize that the first wake-up time slot of the first node intersects with the first wake-up time slot of the second node, or the first wake-up time slot of the first node intersects with the second wake-up time slot of the second node, and the first node and the second node The second node implements node discovery during the crossover period of the wake-up time slot, wherein the first node refers to one node in the sensor network, and the second node refers to another node in the sensor network.

The invention discloses telescopic special equipment for crossing a distribution network line, which comprises an insulated first hydraulic telescopic rod, an insulated second hydraulic telescopic rod, an insulated first cantilever rod and an insulated second cantilever rod. The first cantilever rod and the second cantilever rod are respectively connected to the upper ends of the first hydraulic telescopic rod and the second hydraulic telescopic rod; the free end of the first cantilever rod and the free end of the second cantilever rod can be in butt joint, wire clamping clamps are arranged at the top ends of the first hydraulic telescopic rod and the second hydraulic telescopic rod, U-shaped wire notches are formed in the wire clamping clamps, and the upper side of the first cantilever rod and the upper side of the second cantilever rod are each provided with two wire conveying through grooves which can communicate with each other. The wire conveying through groove is covered with two oppositely-opened cover plates, and opening mechanisms are arranged on the two cover plates. Cross crossing of new lines is achieved, time and labor are saved, cost is low, construction difficulty is lowered, and power failure is not needed.

The invention discloses a photonic crystal light bridge with high transmission rate, high return loss and high isolation, aiming to provide a photon crystal light bridge with high transmission rate, high return loss, easy integration and high efficiency. It includes a photonic crystal with a forbidden band and a photonic crystal waveguide, as well as two input terminals and two output terminals. The left, upper, right and lower sides of the photonic crystal waveguide are respectively two input terminals and two output terminals. ; The photonic crystal waveguide is composed of a photonic crystal vertical waveguide and a photonic crystal horizontal waveguide in a cross shape in the middle; a waveguide defect dielectric column is set in the photonic crystal cross waveguide; two circular defect dielectric columns are respectively set in the four ports of the photonic crystal waveguide , the square defect dielectric column is located in the center of the junction between the vertical waveguide and the horizontal waveguide; the two input ends of the photonic crystal waveguide input two beams of optical signals respectively, and form a cross of optical paths in the common central area to perform mutual non-interference transmission. Output from different ports in a straight line direction.

A guide carriage for use with a guide rail includes a main body and a separate raceway insert. A first carriage raceway that extends parallel to a longitudinal axis is disposed on the raceway insert. The first carriage raceway is assigned a first lateral face, which is disposed on that side of the raceway insert that is opposite the first carriage raceway. The first carriage raceway is assigned a row of rolling bodies capable of being brought into rolling engagement with the first carriage raceway and an assigned first rail raceway on the guide rail. The raceway insert is supported in a force-transmitting manner on the main body by way of the first lateral face. The raceway insert has a sensory layer which in the direction of the longitudinal axis extends across at least 80% of the length of the raceway insert.

The invention discloses a cross-shaped interchange overpass. A first straight and left-turning viaduct, a first straight viaduct and a first small right-turning hump-type viaduct are sequentially arranged on a right trunk road of a north-south longitudinal trunk road from left to right. The first small right-turning hump-type viaduct crosses the cross pavement and is communicated with a eastward left trunk road, and the viaduct is constructed through the left trunk road and the right trunk road of the north-south longitudinal trunk road in a symmetrical mode; a first small straight hump-type viaduct and a third right-turning viaduct are arranged on a eastward right trunk road, and the third right-turning viaduct crosses the cross pavement and is communicated with a northward right trunk road; a fourth small straight hump-type viaduct and a first small left-turning hump-type viaduct are arranged on a eastward left trunk road, and the leftmost lane of the ground of the eastward right trunk road penetrates through the lower portion of the fourth small straight hump-type viaduct in an S shape and is communicated with the first small left-turning hump-type viaduct; the slope part of the first small left-turning hump-type viaduct is communicated with a southward left trunk road through a first left-turning viaduct, and the overpass is constructed through a westward trunk road and a eastward trunk road in a symmetrical mode.

The invention provides a photon matrix vector multiplier based on wavelength routing and an operation method thereof. The problems that an existing optical matrix vector multiplier cannot achieve a large scale and is not feasible are solved. The photon matrix vector multiplier comprises a multi-wavelength light source unit, a first light modulator array, a power divider array, a second light modulator array, an array waveguide grating and a detector array which are arranged in sequence, the first light modulator array comprises N first modulators, the power divider array comprises N power dividers, the second light modulator array comprises N second modulators, the array waveguide grating comprises an input diffraction region, an array waveguide and an output diffraction region which are arranged in sequence, and the detectors are connected with M output ports of the output diffraction region in a one-to-one correspondence mode. Compared with a traditional scheme that space optics is directly mapped to a plane, the multiplier structure provided by the invention has the advantages of high performance, high realizability, easiness in integration and the like.

Disclosed is a three-dimensional cross type medium pool for a serial laser combination in Brillouin amplification, which relates to a medium pool. The invention aims to solve the problem that to suffice the laser incident beam and the emission beam at two directions is difficult, and to adjust the fine cross and overlapping of the two laser beams in the medium pool is also difficult in the prior noncollinear structure medium pool of the serial laser combination. A first component and a second component of the invention are inter-crossed; a third component and a fourth component are also inter-crossed; the middle part of the first component, the second component, the third component, the fourth component and the fifth component are all communicated with each other. The medium pool of the invention makes the Strokes beam and the pump beam to be perpendicular to the injection window when the Strokes beam and the pump beam are injected into the medium pool, and fulfils a larger cross anglewithin the limitation of the permitted errors of the wave vector mismatch angle. A plurality of pump beams can interact with the Strokes beam at the same time in a single serial laser combination structure unit. An adjusting beam passing through the medium pool can realizes the cross and overlapping of the beams in the medium pool.

Disclosed is a two-dimensional cross type medium pool for a serial laser combination in Brillouin amplification, which relates to a medium pool. The invention aims to solve the problem that to suffice the laser incident beam and the emission beam at two directions is difficult, and to adjust the fine cross and overlapping of the two laser beams in the medium pool is also difficult in the prior noncollinear structure medium pool of the serial laser combination. The small end part of a first subassembly and the small end part of a second subassembly of the invention are mutually jointed and communicated with each other. A first component (1) and a third component (3) are symmetrically arranged at the upper end face and the lower end face of a second component (2) taking the second componentas the center; and the three components are communicated with each other. A fourth component (4) and a sixth component (6) are symmetrically arranged at the upper end face and the lower end face of afifth component (5) taking the fifth component as the center; and the three components are communicated with each other. The medium pool of the invention makes the laser beam to be perpendicular to the injection window when the laser beam is injected into the medium pool, and fulfils a larger cross angle within the limitation of the permitted errors of the wave vector mismatch angle. The medium pool of the invention also simplifies the structure and realizes the cross and overlapping of the laser beam in the medium pool with convenient adjusting.

The invention relates to a modulation depth optimization control system for a six-switch converter and a method thereof. The system is technically characterized by comprising two current detection modules, two voltage detection modules, two reference waveform generation modules, a reference current generation module and an operation state detection module, wherein outputs of the two current detection modules and the two reference waveform generation modules are connected to the operation state detection module, and output signals of the operation state detection module are modulated to form driving pulse signals for operation of the six-switch converter. According to the method, the current running state of the six-switch converter is detected, and when the six-switch converter is locatedin a modulation depth optimizable interval, upper and lower paths of reference modulation signals are adjusted. By judging the directions of the upper and lower paths of current and adjusting the positions of the upper and lower paths of reference modulation signals of the corresponding phase, the crossing of the upper and lower paths of modulation signals of the same phase in the same carrier interval is realized, the operation efficiency of the six-switch converter is improved, and the cost of the six-switch converter is reduced.

The invention relates to the field of motors, and discloses a motor stator and a motor, and the motor stator comprises a stator core which is provided with a plurality of grooves; a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; wherein at least two branch windings in each phase winding are sequentially connected in series along the circumferential direction of the stator core; wherein each phase winding comprises a plurality of connecting parts located at the two axial ends outside a stator core groove, each connecting part comprises a groove outer end part of a first conductor section and a groove outer end part of a second conductor section, and each conductor section comprises a groove interior and two groove outer end parts located at the two axial ends outside the stator core groove and connected with the groove interior; by adopting the single conductor section, a small amount of intersection of the winding head is realized, the manufacturing process is simplified, the production cost is reduced, and the processing efficiency is improved.

The invention discloses a broadband data transmission waveform generation and processing method, device and system, and belongs to the technical field of signal processing. According to the method, radar and broadband communication are combined, the advantage of the radar in space detection and the defect that broadband data communication is easily affected by space are fully utilized, the advantage of the radar is used for making up for the defect of broadband communication, the quality of broadband communication is ensured, and the method is particularly suitable for occasions of broadband data transmission.

The invention belongs to the technical field of energy, and discloses a gas hydrate accelerant and an application thereof in saline-water desalting and carbon dioxide capturing. The gas hydrate accelerant has active components including dynamic accelerants and thermodynamic accelerants, wherein the dynamic accelerants are more than one kind of amino acid; and the thermodynamic accelerants are more than one of tetrahydrofuran and cyclohexane. The gas hydrate accelerant can be applied to saline-water desalting and carbon dioxide capturing. According to the invention, the amino acid is used as the gas hydrate accelerant, which is nontoxic and harmless, so that induction time of hydrate can be effectively reduced, gas storage capacity and gas storage density of the hydrate can be improved, and seawater can be efficiently separated and desalted, and thus combined application of gas separation and seawater desalting is achieved; THF and the other hydrate are used as stabilizers, so that stability of the gas hydrate can be improved while the formation condition of the hydrate is reduced, and thus industrial operation is facilitated.

The invention provides a vertical sliding rail type steel structure machining platform which comprises sliding rails and clamping platforms. The sliding rails comprise the transverse sliding rail and the longitudinal sliding rail. The transverse sliding rail and the longitudinal sliding rail are each movably provided with the two corresponding clamping platforms. Each clamping platform comprises a base, a platform face and two clamping mechanisms. Each platform face is rotationally arranged on the upper portion of the corresponding base through a rotary disc. Two parallel sliding ways are arranged on the upper surface of each platform face, and the cross section of each sliding way is of a T-shaped structure. The two clamping mechanisms of each clamping platform are arranged oppositely, and each clamping mechanism comprises two sliding blocks, a strip-shaped clamp plate and locating bolts. The two sliding blocks of each clamping mechanism are mounted in the two corresponding sliding ways in a sliding manner correspondingly, the cross section of each sliding block is of an I-shaped structure, and the bottom of each sliding block is mounted in the corresponding sliding way. A vertical plate is arranged on the upper portion of each sliding block. Each strip-shaped clamp plate is mounted on the two corresponding vertical plates through two spring shafts at the two ends of the strip-shaped clamp plate correspondingly. Outwards-stretching horizontal fixed plates are arranged on the two sides of each sliding block. Each horizontal fixed plate is provided with the corresponding locating bolt in threaded fit with the horizontal fixed plate. Horizontal saw teeth are arranged on the side face of each strip-shaped clamp plate.

The invention discloses a face feature extraction method of a self-adaptive extension cross type local binary pattern. An existing method is not stable enough in feature extraction result and not strong in robustness due to fixed threshold value or single and unbalanced key point sampling. The method comprises the following steps: firstly, preprocessing an input face image to obtain a standard single face grayscale image; determining a local neighborhood and a central pixel; the method comprises the following steps: selecting four inner-layer pixels and four outer-layer pixels, calculating anadaptive threshold according to a normalized linear weighting mode, taking any inner-layer pixel in eight pixels as a starting point, sequentially taking all pixels from the inner-layer pixels to theouter-layer pixels at intervals, comparing with the adaptive threshold, encoding according to a comparison result, and converting into a decimal encoding value; and traversing all the pixels to obtaina local binary pattern coding feature map of the face. According to the method, under various interferences such as illumination, postures, expressions and shielding, the extracted features show goodrobustness, and the method has practical application value for face recognition.