121results about How to "Strong structural adaptability" patented technology

The invention provides a thermal control loop heat pipe of an integrated structure. The thermal control loop heat pipe comprises a structure thermal control hollow metal pipe body filled with phase change media. The structure thermal control hollow metal pipe body is a loop heat pipe (LHP) formed by connecting a condensation pipe and an evaporator in series, the two sides of the evaporator are connected with liquid accumulators where a steam pipe and a reflux pipe pass, and the liquid accumulators on the two sides are both filled with liquid working media. After heat emitted by a heat source is absorbed by an evaporation pipe, the phase of the liquid working media is changed, the liquid working media enter the condensation pipe through the steam pipe to release heat to be condensed and flows back to the evaporation pipe through the reflux pipe, and then a complete loop heat pipe cycle is completed. According to the thermal control loop heat pipe, integration is adopted, a semiconductor refrigeration manner is used, heat emitted out of the interior of the complex structure can be effectively led out accordingly, and the application range of a heat pipe thermal control system is greatly expanded.

The invention discloses a rail-mounted robot walking path changing device and an implement method thereof. The rail-mounted robot walking path changing device comprises a direction changing platform and a plurality of path rails different in the direction. The direction changing platform can be docked with any one of the path rails and comprises a platform base, a platform telescoping mechanism, a platform rotating mechanism and a platform mounting plate, wherein the platform base is connected with the platform telescoping mechanism, the platform telescoping mechanism is connected with the platform rotating mechanism, and the platform rotating mechanism is fixed on the platform mounting plate. The rail-mounted robot walking path changing device has the advantages that multi-channel coexistence and multi-direction selection are realized, one robot can complete jobs in many directions, and operation coverage rate is increased; the rail-mounted walking path changing device is high in applicability to path direction changes and applicable to various angle requirements, the defects of singularity in angle of turn of the curved rails and the paths are overcome, and design randomness of the paths is realized.

The invention discloses a method for identifying an electroencephalogram image based on a deep convolutional neural network. The method comprises the following steps: carrying out baseline eliminationpreprocessing on a collected motor imagery electroencephalogram signal; Dividing each lead signal into a plurality of time windows, and carrying out fast Fourier Transform on each window MI-EEG model, carrying out fast Fourier inverse transform on the EEG models respectively, and calculating corresponding time domain power values of the EEG models; Calculating a mean value of the time domain power values obtained by each window to obtain time domain power characteristics; Performing interpolation imaging on the extracted three-frequency-band power characteristics in a data matrix to obtain apseudo RGB image of the MI-EEG signal; Designing the DCNN model into five segments of convolution, and after each segment of convolution is finished, replacing a maximum pooling layer with a convolution layer to carry out data dimension reduction; And performing evaluation on the test set by using the trained DCNN model to complete a classification test. MI-EEEG images have the advantages in the aspect of feature expression, and are matched with 30 layers of DCNN with higher model fitting capability, which has great significance for the improvement of the MI- EEG signal feature expression andclassification precision .

The invention discloses a positron emission tomography imaging frame with a variable structure. Detection modules in the frame can be adjusted in multi-degree of freedom. The frame comprises a frame inner ring and / or a frame fixed ring and / or a frame outer ring, wherein the detection module on each module track forms a detection ring for imaging; the detection modules can realize radial movement, circumferential motion and / or direction adjustment on the module tracks on a round track of the frame inner ring so as to build the detection rings with various dimensions and / or shapes; the detection modules can be moved to other module tracks under the action of a mechanical arm on the frame outer ring and change the sequence of the detection modules so as to construct the detection rings with various different properties of the detection modules; and the whole detection rings can do circular motion. The frame has high structure adaptability and high adjustability and is a key technique for realizing customized type, one-machine multifunctional type and one-machine multi-purpose type application adaptability positron emission tomography imaging instruments.

The invention discloses a purifier for ecological restoration of a water body. The purifier comprises a floating island in the air, a floating island on the water and a floating island beneath the water, wherein the floating island in the air comprises a supporting framework and terrestrial plants arranged on the framework, the floating island on the water comprises a floating island unit and emergent plants, the floating island beneath the water comprises a microorganism biofilm forming member and submerged / floating-leaved plants, the floating island unit comprises a planting area for the emergent plants and a planting area for the submerged / floating-leaved plants, the supporting framework is arranged on a planting area for aquatic plants, the microorganism biofilm forming member is hung below the planting area for aquatic plants, and the submerged / floating-leaved plants are arranged in the planting area for the submerged / floating-leaved plants. The invention has the following advantages: a stereo ecological environment can be constructed according to growth needs of different plants, air in and above a water body can be purified at the same time, easy attachment of microorganisms is realized, which is beneficial for establishing good ecological balance, a multi-level structure has strong adaptability, and abundant landscape effects can be obtained.

The invention relates to a multiple-frequency-band antenna device for near field communication. The multiple-frequency-band antenna device comprises an interface module, a low-frequency magnetic coupling coil, a 13.56MHz antenna module and a 2.4GHz radio-frequency antenna module, wherein the low-frequency magnetic coupling coil, the 13.56MHz antenna module and the 2.4GHz radio-frequency antenna module are connected with the interface module. An interval exists between the low-frequency magnetic coupling coil and the 13.56MHz antenna module, and the low-frequency magnetic coupling coil is connected with a main control device through the interface module and sends a low-frequency alternating magnetic field to transmit data to a mobile communication terminal. The 13.56MHz antenna module emits a radio-frequency signal, is connected with the main control device through the interface module, and carries out data interaction with the mobile communication terminal. The 2.4GHz radio-frequency antenna module is connected with the main control device through the interface module and carries out data interaction with the mobile communication terminal. The multiple-frequency-band antenna device has the beneficial effects that users can operate fast and conveniently, and the multiple-frequency-band antenna device is more easily popularized.

The invention discloses a modular internal gear pump or a modular motor, comprising a plurality of generalized components such as a shell, an internal gear pair, an input shaft, a fixed shaft tray component, a floating shaft tray component, a flange cover component, a rear cover component and the like, so as to form a barbell type combined structure connected in series, thus realizing modularization of functions, combination of structures and universalization of parts. The invention has the advantages of good universalization of parts, flexible and simple assembly and excellent adaptability of structures, thus achieving the beneficial effects of reducing inventory of parts, shortening the cycle of production and goods delivery and reducing operation cost of products.

A clamp structure that provides versatility and structural adaptability to different clamping surfaces. A tension member can be coupled to the inside of a tubular body at one end and to a rod at the other end. Removable grips can be coupled to the ends of the body, but are not directly coupled to the tension member so that changing the grips can be done without removing the tension member from its anchored position. The grips can, in some embodiments, be pivotable so as to accommodate a variety of different gripping surfaces. Various holding members such as a tool holder, a utility hook and / or a claw grip can be movably provided on the body and can hold tools or light fixtures in a variety of configurations.

The invention discloses a foldable circular-arc-shaped supporting device. Inner telescopic shafts and outer telescopic shafts are connected in a sliding mode, the outer ends of the inner telescopic shafts are connected with left supporting shafts in a rotating mode, and the outer ends of the outer telescopic shafts are connected with right supporting shafts in a rotating mode. Sleeves are arranged on the outer telescopic shafts in a sleeved mode, and front top plates and first sleeves are fixedly connected. The two ends of each connecting rope penetrate through front top plate rope holes and rear top plate rope holes respectively, and connecting convex plates and connecting concave grooves are matched. A plurality of supporting modules are sequentially arranged from front to rear in an arc shape, and a cross is arranged between every two adjacent supporting modules. The two ends of first upper cross bar frames, the two ends of second upper cross bars, the two ends of first lower cross bars and the two ends of second lower cross bars are connected with the corresponding left supporting shafts and the corresponding right supporting shafts respectively in a rotating mode. Two bases are arranged on the front portions and the rear portions of the supporting modules respectively. The lower ends of the left supporting shafts on the front portion and the rear portion are fixedly connected with corresponding second base pillars respectively, and the lower ends of the right supporting shafts on the front portion and the rear portion are fixedly connected with corresponding first base pillars respectively. The foldable circular-arc-shaped supporting device is used for supporting other components in an annular cavity.

The invention discloses an ultrathin flexible flat-plate heat pipe. The flat-plate heat pipe comprises an upper flexible composite cover plate, a lower flexible composite cover plate, a flexible red copper wire mesh and a supporting column structure growing on the lower flexible cover plate; each of the upper cover plate and the lower cover plate is formed by three layers of materials, the middlelayer is provided with a high-thermal-conductivity flexible graphite film, and ultra-thin copper foil layers are obtained on the two sides of the flexible graphite film through physical vapor deposition / electrolytic deposition; a closed cavity is formed between the cover plates through edge sealing, and the sealed cavity after vacuumizing is filled with working liquid; and circular micro-columnsformed on the inner side of the lower flexible cover plate through electrolytic deposition / 3D printing / mold extrusion form flexible flat-plate heat pipe supporting columns. The flexible red copper wire mesh subjected to hot pressing sintering on the upper flexible cover plate serves as a capillary core structure of the heat pipe. The ultrathin flexible flat-plate heat pipe has the advantages ofbeing small in size, light in weight, high in heat conductivity and good in flexibility, so that the surface adaptability is strong.

The invention relates to a MPEG-4 SP-to-AVS video code transformation method, which is characterized in that the method comprises the following steps: step one, a MPEG-4 SP code stream is decompressed fully to obtain the MPEG-4 SP data; step two, the MPEG-4 SP data is processed to obtain an image spatial domain sequence for specifying a space and the time resolution, an AVS image coding type, an AVS micro block coding mode and an AVS micro block motion vector; step three, an AVS code stream is obtained from the image spatial domain sequence for specifying the space and the time resolution, the AVS image coding type, the AVS micro block coding mode and the AVS micro block motion vector. A rapid MPEG-4 SP-to-AVS code transformation strategy based on a cascading structure in the invention can be suitable for the high fidelity real-time code transformation, the adaptability of the structure is strong, and the invention can meet a plurality of code transformation application requirements. The invention is in particularly suitable for the integration, and the concentrated browsing, transmission and memory of video resources under the heterogeneous condition of a cross-area cross-industry monitoring network at present.

The invention discloses an inspection robot for detecting soil of abandoned mine land a working method thereof. According to the inspection robot, a displayer is mounted above a power system, a samplestorage area is fixed above the displayer through supporting columns, and a GPS signal receiver and an industrial personal computer are mounted on a movable platform; a rotation platform is mounted above the industrial personal computer, vision cameras are arranged on two supports and face forward, one end of an electric mechanical arm is connected with a motor on the rotation platform, and a bucket is hinged to the other end of the electric mechanical arm through transmission; a torque sensor is arranged at the hinge portion of the electric mechanical arm and the bucket, a temperature humidity sensor is arranged at an excavating end of the bucket, an ultrasonic transducer is arranged on the side portion of the movable platform, a laser radar is mounted at the front end of the industrialpersonal computer, and the scanning direction of the laser radar is horizontal. The inspection robot can automatically navigate to conduct inspection in the abandoned mine land, can also conduct soiltemperature-humidity detection and sampling on multiple areas of the abandoned mine land, and guarantees the accuracy and real-time performance of soil detection.

The invention provides a rare earth oxide / butadiene styrene rubber composition which is mainly prepared from (1) 100 percent of butadiene styrene rubber latex (dry latex) and (2) 120 to 200 percent of an organic rare earth oxide. A preparation method comprises the following steps: esterizing the surfaces of rare earth oxide particles by adopting lauric acid polyol ester under a condition of an alkaline aqueous solution to enable the surfaces to carry ester group and hydroxyl with strong polarity, then performing grafting polymerization on styrene-butadiene latex by adopting an unsaturated acrylate polar monomer, wrapping the surfaces by using grafted styrene-butadiene latex to realize surface organization of the rare earth oxide particles, finally directly mixing the rare earth oxide particles with styrene-butadiene latex without adding any additive, and performing agglomeration, dehydration and drying to prepare the rare earth oxide / butadiene styrene rubber composition. The composition is high in X-ray shielding performance; compared with a conventional lead-containing X-ray shielding material, the rare earth oxide / butadiene styrene rubber composition is light in weight, low in cost, pollution-free and high in structural adaptability in an actual application process. The invention further discloses the preparation method of the composition.

The invention discloses a rail-mounted robot walking path changing device and an implement method thereof. The rail-mounted robot walking path changing device comprises a direction changing platform and a plurality of path rails different in the direction. The direction changing platform can be docked with any one of the path rails and comprises a platform base, a platform telescoping mechanism, a platform rotating mechanism and a platform mounting plate, wherein the platform base is connected with the platform telescoping mechanism, the platform telescoping mechanism is connected with the platform rotating mechanism, and the platform rotating mechanism is fixed on the platform mounting plate. The rail-mounted robot walking path changing device has the advantages that multi-channel coexistence and multi-direction selection are realized, one robot can complete jobs in many directions, and operation coverage rate is increased; the rail-mounted walking path changing device is high in applicability to path direction changes and applicable to various angle requirements, the defects of singularity in angle of turn of the curved rails and the paths are overcome, and design randomness of the paths is realized.

The invention discloses a weaving method of a woven spacer fabric structural antenna. The method comprises the following steps: selecting conductive yarns, weaving the conductive yarns and fibers with low-dielectric-loss performance into a radiation element and a grounding plate of the spacer fabric microstrip antenna, wherein the radiation element and the grounding plate are respectively used as a top layer and a bottom layer of the spacer fabric; and compositing a microstrip antenna preformed part with a coaxial feed and an appropriate resin material to obtain the spacer composite material microstrip antenna structure. Since the woven spacer fabric has a hollow structure characteristic, the microstrip antenna is light in weight, resistant to impact, unlikely to layer, capable of greatly improving the reliability and prolonging the service life of the antenna and wide in application prospect in the fields such as aerospace, transportation and information.

The invention discloses a module top heating system suitable for a soft package power battery and a control method. The module top heating system mainly comprises a soft package battery core module, a heater, a temperature collector and a BMS, wherein insulating treatment is adopted for the surface of the heater; the heater is attached to a busbar at the top of the soft package battery core module; a module cover plate presses a heating film, so that the heating film is clung to the busbar; a temperature collector probe is arranged on the busbar of the module; and the heating film and the temperature collector are connected to the BMS. The heat energy transfer path is the heater-busbar-tab-copper-aluminum foil-positive and negative electrode materials- membrane-electrolyte-aluminum-plastic film-battery core external parts, heat energy is transferred outwards from the inside of a battery core through the tab, the heat transfer path is more reasonable and the heating efficiency is high.

The invention discloses a hierarchical optimization control method for a multifunctional energy storage system of an electrified railway. The hierarchical optimization control mainly comprises a global optimization layer which is used for system energy management, a regional decision-making layer used for coordination control and electric energy quality comprehensive compensation under normal / abnormal working conditions among the subsystems, and a local execution layer which ensures that self-discipline control is carried out in each independent subsystem. Train regenerative braking energy can be effectively recycled, multiple electric energy quality problems of a traction power supply system can be solved, the traction power supply quality can be improved, and extra economic benefits can be brought; and meanwhile, the energy storage system forms a distributed redundant system with fault-tolerant capability based on a modular parallel structure, continuous execution of the multiple functions can be ensured even under the condition of external disturbance or local faults, the strict requirements for internal power electronic devices are reduced, and the adaptability of the system is improved.

The invention discloses a friction nano-generator based wind power generation integrated system. The system includes integrated multiple friction nano-generators; the friction nano-generators can convert wind energy into electric signals to output; each friction nano-generator includes a first plate electrode, a second plate electrode and a vibrating film; the second plate electrodes and the firstplate electrodes are in opposite arrangement, and distances exist between the second plate electrodes and the first plate electrodes; the vibrating films are arranged between the first plate electrodes and the second plate electrodes, and can be in contact with or separated from the first plate electrodes and the second plate electrodes during up and down vibration; and friction electrode sequence difference exists between the vibrating films and materials of first and second plate electrodes. The system is high in power generating efficiency, sensitive in wind speed induction, simple in manufacturing, small in size and strong in structural adaptability, so that the system can be used as a substitution scheme of wind power generation towers.

The invention discloses an automobile radiator assembly installation frame, which comprises an upper radiator transverse beam, a left upper radiator bracket, a right upper radiator bracket, a left radiator upright post, a right radiator upright post, a front engine carriage transverse beam, a left lower radiator bracket and a right lower radiator bracket, wherein the left upper radiator bracket and the right upper radiator bracket are welded on the upper radiator transverse beam; the left lower radiator bracket and the right lower radiator bracket are welded on the front engine carriage transverse beam; the left upper radiator bracket and the right upper radiator bracket are arranged oppositely one above the other; the four brackets are taken as four installation points of a radiator; the left radiator upright post and the right radiator upright post are connected to the two ends of the upper radiator transverse beam; the lower ends of the left radiator upright post and the right radiator upright post are connected to the two ends of the front engine carriage transverse beam through bolts; and the front engine carriage transverse beam is a part of an engine bracket assembly. Due to the adoption of the automobile radiator assembly installation frame, the installation requirements of a radiator assembly can be met, the strength and rigidity of the radiator installation frame are optimized, and the weight of the radiator on the front part of an automobile is scattered; and the automobile radiator assembly installation frame has high generality, can be general for derivative automobiles of the same style, has high assembly manufacturability, is installed on the premise of not influencing the original structure of the radiator, and is convenient to detach.

The invention discloses an angle self-adaptation and lifting type construction platform and belongs to the technical field of building construction. The angle self-adaptation and lifting type construction platform is designed through the improvement based on a traditional construction platform. The structural framework the angle self-adaptation and lifting type construction platform is of a stable supporting structure which is formed by multiple rows of triangles, the structural angle of the construction platform can be self-adaptive due to the arrangement of hydraulic supporting rods with one sides capable of being adjusted, and the construction platform can be lifted due to the arrangement of the stacked-track sliding rail which can be assembled and lifting equipment. Due to the fact that the structural angle is self-adaptive, the construction platform can be adapted to the outline change of a special-shaped structural construction formwork with a great-variability cross section through self-adjustment of the structure, and due to the fact that the rail type lifting function is achieved, the lifting equipment can lift the construction platform along the rail to enable the construction platform to be adapted to the curved surface change of the special-shaped structural construction formwork through the self-adjustment of the structure. The angle self-adaptation and lifting type construction platform is adaptable to the change of a special-shaped structural construction surface with a great-variability cross section and has the advantages of being simple in structure, safe, flexible, easy to operate and the like.

The invention discloses an inclined-type polyhedral-structure thermoelectric arm. The three-dimensional structure of the thermoelectric arm is an octahedral structure; the octahedral structure of the thermoelectric arm comprises a side surface A, a side surface B, a bottom surface A, a bottom surface B, a cut surface A, a cut surface B, an inclined surface A and an inclined surface B; the side surface A is parallel to and equal to the side surface B; the bottom surface A is parallel to and equal to the bottom surface B; the cut surface A is parallel to and equal to the cut surface B; the inclined surface A is parallel to and equal to the inclined surface B; corner regions of two ends of each of long diagonals of a common inclined parallel hexahedron thermoelectric arm are cut, so that the inclined-type polyhedral-structure thermoelectric arm can be obtained; and a cutting angle theta satisfies a relational expression that L1 / sin(pi-alpha-theta)=L2 / sin(theta), wherein L1 is the edge length of cut portions along a horizontal direction, L2 is the edge length of the cut portions along directions of the inclined surfaces, alpha is the angle of inclination of the octahedral structure, and theta is the cutting angle. With a semiconductor thermoelectric unit of which the thermoelectric arm is of an inclined-type polyhedral structure adopted, a whole thermoelectric power generation system can have higher mechanical stability, higher structural adaptability and a better heat transfer characteristic.

The invention relates to a tilted semiconductor thermoelectric module using thermoelectric arms with octahedral structures. The module comprises two thermoelectric arms with octahedral structures, copper conductive sheets and an insulating layer, wherein the two thermoelectric arms with the octahedral structures are parallel or symmetrical and are arranged between the two copper conductive sheetsin a parallel connection mode, and the insulating layer is disposed outside the two copper conductive sheets. The two thermoelectric arms with the octahedral structures are obtained by removing cornerregions at two ends of long diagonal lines from a tilted parallelepiped thermoelectric arm, and the copper conductive sheets are added to the positions of removed parts. A tilted polyhedral structurethermoelectric arm of the invention can be applied to a module of a special structure thermoelectric power generation system, such as a double-spiral structure and a tilted multi-layer plate type structure. According to the tilted structure, the whole system has higher mechanical stability and structural adaptation and a better heat transfer characteristic.

The invention relates to a manufacturing method for metal-based foil-like brazing filler metal in a complex shape. As a low-speed feeding and precise wire cutting mode is adopted, the metal-based brazing filler metal with the clean surface can be obtained by means of surface treatment on the brazing filler metal, preparation before wire cutting, precise wire cutting, and brazing filler metal cleaning after wire cutting, wherein the metal-based brazing filler metal can be separated singly. The manufacturing method for the brazing filler metal is high in efficiency, good in repeatability and good in structural adaptability, the brazing filler metal of a complex structure can be manufactured, and the manufacturing method can be widely used for replacing a current manual operation mode.

The invention discloses an adaptive angle self-climbing construction platform, belongs to the technical field of building construction, and aims to meet requirements of the current situation of a construction platform of a current special-shaped structure construction formwork with large section variability and overcome the shortcomings of the structural current situation of the construction platform. The adaptive angle self-climbing construction platform is improved based on a traditional construction platform, and the structure of the construction platform is designed into a multi-row triangular framework structure. The adaptive angle self-climbing construction platform has angle adaptive and self-climbing functions by the aid of sequential deformation of an edge sharing spliced triangular structure and design of related components. The construction platform can adapt to shape transformation of the special-shaped structure construction formwork with the large section variability in a self-adjusting structural mode by the aid of the angle adaptive function, and can automatically climb on a rail laid along the formwork after the structure of the construction platform is adjusted by the aid of the self-climbing function. By the design of the adaptive angle self-climbing construction platform, the construction platform is adaptable to construction transformation of a special-shaped structure with the large section variability and simple in structure, and has the advantages of safety, flexibility, operability and the like.

The invention discloses a cast in-situ piling pile reinforcement bridge pier structure and construction method, composed of a bedrock, a pier, a tendon, a reinforced concrete frame and a spiral hoop, wherein the vertical throughout pier and a plurality of drilling holes penetrating into the bedrock are set in the pier and the tendon is set in the drilling holes and embedded into the bedrock and the drilling hole, the tendon and the bedrock are anchored by casting the reinforced concrete and the upper end of each tendon is anchored on the upper surface of the pier by the reinforced concrete frame. The invention also discloses a construction method of the cast in-situ piling pile reinforcement bridge pier. The cast in-situ piling pile reinforcement bridge pier has features of strong adaptability for the pier structure of the inhere bridge, wide application, simple and firm structure, obvious anchoring effect.

The invention provides a device for repeatedly positioning a workpiece and retaining the free form of the workpiece. The device comprises retainers (2), and each retainer (2) includes a first clamping piece (12), a second clamping piece (13) and a third clamping piece (14) which are tightly and fixedly connected with one another. The invention further provides a method for repeatedly positioning the workpiece and retaining the free form of the workpiece. According to the device for repeatedly positioning the workpiece and retaining the free form of the workpiece, during the multiple times of clamping, the workpiece is mechanically connected with a tool, the relative position is fixed, the tool and a machining actuating station such as a manipulator are connected through a zero point positioning system, and thus, the effect that the repeatedly installed workpiece is consistent with the machining actuating station in posture can be ensured.

The invention relates to the technical field of phase change heat-transferring and discloses a truss-type steam-liquid phase change heat-transferring device and an assembling and welding method thereof. The truss-type steam-liquid phase change heat-transferring device comprises tube shells internally provided with capillary cores, joints internally provided with capillary cores, sealing end covers, filling end covers and filling tubes. The shapes of the joints include the T shape, the L shape, the cross shape and the special shape. Any two of the tube shells internally provided with the capillary cores can form a truss structure through the corresponding joints internally provided with the capillary cores, the capillary cores and steam channels between any two of the tube shells mutually communicate with the capillary cores and steam channels in the corresponding joints, and thus stem-liquid phase change heat-transferring working media are circulated in the whole truss device. Heat consumption of a heat source inside a space camera can be efficiently transferred to the camera structure while the truss-type steam-liquid phase change heat-transferring device serves as a space camerasupporting structure, and on-orbit resources are efficiently saved.

The invention discloses a tungsten-nickel-iron alloy and high-strength steel diffusion welding method for an intermediate layer prepared through material reduction, and belongs to the technical field of dissimilar metal material welding. According to the method, tungsten particle phases with a certain thickness on the surface of the tungsten-nickel-iron alloy are removed in situ by adopting an electrolytic erosion process, only NiFeW phases are left, and the porous NiFeW intermediate layer is prepared on the surface of a tungsten-nickel-iron alloy base metal in a manner of in-situ material reduction; and then, the tungsten-nickel-iron alloy is assembled with a high-strength steel base material to be subjected to vacuum diffusion welding, and finally a welding joint of a tungsten-nickel-iron alloy / (NiFeW solid solution and dispersed W particles) composite connecting layer / high-strength steel structure is formed. The method has the advantages that (1) the porous NiFeW intermediate layer prepared on the surface of the tungsten-nickel-iron alloy through electrolytic erosion in-situ material reduction is high in structural adaptability; (2) the welding joint completely avoids the appearance of interface intermetallic compounds; and (3) the linear expansion coefficient of the composite connecting layer of the NiFeW solid solution and the dispersed W particles is between that of the tungsten-nickel-iron alloy and that of the high-strength steel, so that the welding thermal stress is effectively relieved.

The invention discloses a beam near-field intensity distribution self-homogenizing high-energy laser device. The device includes a beam rotation system, wherein the beam rotation system includes at least five reflectors of an odd number, the five reflectors are set as a first reflector, a second reflector, a third reflector, a fourth reflector and a fifth reflector, all the reflectors are in the same optical principal plane, and a center connection line of the first reflector and the fifth reflector constitutes a rotation axis of the beam rotation system. The device is advantaged in that the beam rotation system enables same-optical axis transmission of an incident beam and an outgoing beam, uniform distribution of the light field in a cavity is achieved through utilizing the gain self-compensation effect during beam rotation, the beam quality of the laser device is effectively improved, moreover, combined with a shaping beam expanding system and the beam rotation system, the laser mode volume is fully expanded, and the utilization rate of gain zone activated particles is improved.