876results about How to "High engineering application value" patented technology

The invention relates to a broadband wave absorption composite material with a multilayer structure and a preparation method thereof. The broadband wave absorption composite material is characterized in that the material comprises three parts, namely a surface layer, a sandwich layer and a bottom layer; the surface layer comprises, by mass percentage, 20 to 50 percent of carbonyl iron dust, 30 to 48 percent of polymer and 20 to 32 percent of fiberglass cloth; the sandwich layer comprises, by mass percentage, 2 to 6 percent of carbon nanometer tube, 56.4 to 58.8 percent of polymer and 37.6 to 39.2 percent of fiberglass cloth; and the bottom layer comprises, by mass percentage, 50 to 80 percent of carbonyl iron dust, 12 to 30 percent of polymer and 8 to 20 percent of fiberglass cloth. The broadband wave absorption composite material has the advantages of low surface density, thin thickness and high mechanical strength, and improves the bearing performance and the engineering application value.

The invention discloses a multilevel multitask parallel decoding algorithm on a multicore processor platform, and provides the multilevel multitask parallel decoding algorithm for effective combination of tasks and data on the multicore processor platform by utilizing the dependency of HEVC data by aiming at the problems of mass data volume of high-definition videos and ultrahigh processing complexity of HEVC decoding. HEVC decoding is divided into two tasks of frame layer entropy decoding and CTU layer data decoding which are processed in parallel by using different granularity; the entropy decoding task is processed in parallel in a frame level mode; the CTU data decoding task is processed in parallel in a CTU data line mode; and each task is performed by an independent thread and bound to an independent core to operate so that the parallel computing performance of a multicore processor can be fully utilized, and real-time parallel decoding of HEVC full high-definition single code stream using no parallel coding technology can be realized. Compared with serial decoding, the decoding parallel acceleration rate can be greatly enhanced and the decoding image quality can be guaranteed by using the multicore parallel algorithm.

The invention relates to an electrokinetic remediation method of heavy metal contaminated soil by using a composite electrode. According to the invention, an active material layer is adhered to the surface of a graphite electrode or a metal electrode with an anode and a cathode so as to form an integrated composite electrode with permeable reactive performance; on one hand, a cathode permeable reactive layer is used for neutralizing and adsorbing OH- generated by electrode reaction, avoiding the increase of pH value of cathode soils and further preventing heavy metals from depositing in the soils untimely; on the other hand, cathode permeable reactive layer is used for capturing the migrated heavy metal pollutants. The permeable reactive materials of the anode are mainly used for capturing the migrated heavy metal ions, an acid migration area generated by anode electrolytic reaction enters into the soil so as to dissolve out most heavy metals, the heavy metals are migrated into the anode and cathode permeable reactive materials under the action of an electrodynamic force, and in-situ removal of the heavy metal pollutants in the soil can be realized by the removing electrode. Afterremediation, the anode and the cathode are exchanged to balance the pH value of the soil.

The invention discloses an industrial robot torque compensation control method based on load adaptive identification. The industrial robot torque compensation control method comprises the steps that according to robot overall stress balance analysis, a robot dynamics model under the load working condition is established in a deduced mode through a Newton-Euler method on the basis of considering friction; the optimal excitation trajectory of robot load identification is solved; load inertial parameters are calculated; and on the basis of load inertia matching, joint driving torque consumed by the load when a robot moves under the load working condition is compensated, and further verification and optimization are conducted through experiments. According to the industrial robot torque compensation control method, the influences of the load on operation performance of the robot are considered, under the premise that no any external sensor is needed, adaptive identification of any load andtorque compensation control are completed through easy operation easy to achieve, the control precision of the robot under the load working condition is effectively improved, and very important significance for processes such as carrying and friction stir welding of the industrial robot under high-speed and large-load movement is achieved.

The invention discloses the achievement of a single chip microcomputer firmware upgrading method based on a network, wherein the specific achievement process comprises the following steps of firstly designing memory address space of a BootLoader program and a user program in an internal memory of a single chip microcomputer; programming the BootLoader program by utilization of a JTAG (Joint Test Action Group) interface or an emulator, wherein the BootLoader program has module functions of reading, writing and erasing memory data, jumping program addresses and downloading network data; writing the BootLoader program in an on-chip Flash; erasing and writing an on-chip user program in the single chip microcomputer through the BootLoader program so as to realize remote upgrading and operation of the user program in the on-chip Flash. Compared with the prior art, the achievement of the single chip microcomputer firmware upgrading method based on the network has the advantages that the remote upgrading of the system firmware of the single chip microcomputer is realized, the convenience of the product firmware upgrading is improved, the system maintenance cost can be reduced at the same time, better economic benefits can be produced, and the effects of higher actual engineering application values, strong practicability, wide application range and easiness in popularization are achieved.

The invention discloses a geometric coordinate transformation guide control method for achieving positioning rotation of a dynamic positioning ship. The geometric coordinate transformation guide control method for achieving positioning rotation of the dynamic positioning ship comprises the steps of (1) setting target heading of the dynamic positioning ship and a hull coordinate of the center of rotation, calculating an expected track of the dynamic positioning ship in the process of positioning rotation by combining a mathematic model of movement of the dynamic positioning ship and introducing a geometric coordinate transformation guide strategy, (2) calculating an expected heading and an expected position of the dynamic positioning ship at the current moment, and (3) applying a PID control algorithm to obtain force and torque needed for controlling longitudinal movement, transverse movement and yawing of the dynamic positioning ship to enable the dynamic positioning ship to reach the expected position and the expected heading so as to achieve the positioning rotation, of the dynamic positioning ship, around the center of the rotation according to the difference between an actual position at the current moment and the expected position and the difference between an actual heading at the current moment and the expected heading. The geometric coordinate transformation guide control method for achieving positioning rotation of the dynamic positioning ship does not need to change a thrust distribution center, can ensure the fact that a positioning rotation system is in a closed-loop control loop, improves accuracy of control, and is simple and practicable in process of calculation, and applicable to operation of ocean engineering.

The invention discloses a networking method for an OFDMA system, which comprises the following steps: step S102, frequency planning is carried out on the cells (sectors) covered by the OFDMA system; a flexible frequency reuse mode of which the frequency reuse factor is 1 is adopted between the cells (sectors); each cell (sector) is divided into a plurality of regions, different frequency resources are distributed to the users in different regions and the distribution modes of the frequency resources between the cells (sectors) are coordinated; step S104, the frequency planning of each region is carried out; the total power of a base station is divided into two parts, one of which is used for compensating path loss and the other one of which is used for power filling and judging the proportion of the path loss compensation power and the filling power. By adopting the networking method, the co-channel interference between the cells (sectors) can be effectively constrained and the link quality and the spectrum efficiency of the system can be improved.

The invention discloses a preparation molding method of a Glare component, and belongs to the field of preparation and molding of composite materials. The method comprises the following steps: treating the surface of an aluminum alloy blank; laying a composite laminate; positioning the composite laminate on a concave die of a differential-pressure molding device; treating by vacuumizing and side pressing; heating the composite laminate to reach the temperature required for realizing the synchronization of solidifying of epoxy resin and age molding of aluminum alloy; performing bidirectional differential-pressure loading on the composite laminate in the differential-pressure molding device to realize the synchronization of the solidification of the epoxy resin and age molding and strengthening of aluminum alloy, thus realizing the preparation of a Glare laminate and integral molding of the component; then clipping redundant blanks on the Glare component. The preparation molding method of the Glare component is applicable to integrated molding of the Glare components of various complex structures, is also high in molding efficiency, outstanding in accuracy, small in resilience and relatively high in engineering application value.

The invention discloses a four-quadrant reservoir stratum type identification method and system, wherein the four-quadrant reservoir stratum type identification method comprises the following steps: selecting a core sample, and acquiring the mud filtrate specific resistance and electrical imaging logging information of a well corresponding to the core sample; performing CT scanning imaging on the core sample to generate a CT imaging pore distribution spectrum of the core sample; according to the mud filtrate specific resistance and the imaging logging pixel conductivity, computing an electrical imaging porosity spectrum of the well corresponding to the core sample by utilizing the Archie's formulas; calibrating the electrical imaging porosity spectrum corresponding to a stratum segment by utilizing the CT imaging pore distribution spectrum, and computing the mean value and distribution variance of the calibrated electrical imaging porosity spectrum; performing standardized treatment on the mean value and distribution variance of the calibrated electrical imaging porosity spectrum to generate the standard mean value and distribution variance of porosities; forming a two-dimension plane by the standard mean value and distribution variance of porosities, wherein the standard mean value of porosities is the abscissa axis, and the standard distribution variance of porosities is the ordinate axis; and identifying the reservoir stratum type according to the two-dimension plane.

The invention discloses a 3D free-bending forming method and five-axis free bending device for metal pipes. The five-axis free bending device for the metal pipes comprises a pipe pushing module, a pipe axial-movement guiding module, a manipulator bending module, an induction coil heating module, a lubrication module, a reverse scanning module and a measurement module. The pipe pushing module comprises a conical push rod (3), a Z-direction servo motor (5), a ball screw (4) and a linear guide rail (1), and the Z-direction servo motor (5) is used for axial feeding of the pipes. The manipulator bending module comprises an X-direction servo motor (15), a Y-direction servo motor (16), a bending die driving servo motor (18), a bending die holder driving servo motor (17), a bending die (8) and a bending die holder (9). According to the 3D free-bending forming method and five-axis free bending device for the metal pipes, elbow pipes with different bending radii can be formed only by controlling the movement track of the manipulator bending device, and meanwhile since the plane of the bending die can be kept perpendicular to the axes of the pipes in real time, the forming quality of the bent pipes is good.

Disclosed is a diagnostic method of space gridding structure node bolt loosening injury. The diagnostic method of space gridding structure node bolt loosening injury comprises that a bolt ball node is modeling elaborately and a structural combination unit model is set up. The diagnostic method of space gridding structure node bolt loosening injury is divided into a plurality of substructures and is numbered according to a way of geometric position continuity according to composition characteristics of the space gridding structure. A structure testing point is optimizely arranged in a sensor mode and sensitivity analysis of a rod piece is carried out by frequency. Numerical value of bolt loosening injury is simulated. A training sample, an input parameter and an output parameter of a neural network is confirmed. An injury sample is input to a generalized regression neural network (GRNN) network B which is training completed. The output is an injury index of the node, namely the injury position is positioned to the existing node. The number of a training sample when the injury is accurately positioned can be greatly reduced. Practicality that the space gridding structure node bolt loosening injury is diagnosed by taking advantage of neural network technology is strengthened. Especially the diagnostic method of space gridding structure node bolt loosening injury has a prominent advantage to a large-scale space gridding structure with a plurality of the nodes.

The invention discloses a shaped surface-oriented quick determination method for adjustment quantity of an active panel of a large parabolic antenna. The method comprises the steps of determining an antenna structure model and an actuator supporting node; determining an overall reflection surface shape of the large parabolic antenna under two working modes, and determining a fitting equation of a shaped surface; extracting node information of the active panel on the refection surface; calculating a target curved surface with minimum fitting root mean square error with the shaped surface; determining corresponding nodes of the panel and the target curved surface, and calculating an actuator adjustment quantity; calculating axial errors of all nodes of the adjusted overall reflection surface; calculating an antenna gain using an electromechanical coupling, judging whether the antenna gain meets the requirement, and outputting an optimal actuator adjustment quantity. By adopting the method, the optimal adjustment quantity of the active panel actuator of the antenna can be directly and accurately adjusted, so that the adjusted overall reflection surface of the antenna is closer to the shaped surface, the electric performance of the antenna can be obviously improved, and an accurate surface shape conversion function of the large parabolic antenna under two working modes is realized.

The invention discloses a coal flow monitoring system based on a laser radar and speed information. The coal flow monitoring system comprises a belt conveyor, a two-dimensional radar which is installed above the belt conveyor and is used for obtaining a cross section outline curve of a coal flow, a speed sensor which is installed on a lower belt position of the belt conveyor and is used for obtaining the belt running speed and a coal flow calculation terminal used for solving and completing calculation of coal flow through integral. According to the coal flow monitoring system based on the laser radar and the speed information, a laser radar technology and an image processing technology are combined, the coal flow of the coal downhole belt conveyor can be automatically measured, essential technical support is provided for computing the coal flow of the coal downhole belt conveyor, and the method has significant importance in coal flow statistics.

The invention discloses a device and a method for aligning a position of an optical element in a direction of an optical axis. The device comprises a normal lens, a computed hologram and the to-be-measured optical element which are sequentially placed in an optical axis of an output beam of an interferometer, wherein the computed hologram is fixed on a small five-dimensional adjustment rack; the to-be-measured optical element is fixed on a large five-dimensional adjustment rack; the computed hologram is placed in a design position behind a focus of the normal lens; a beam from the interior of the interferometer passes through the normal lens and emits to the computed hologram to allow a divergent spherical wave front to become a convergent spherical wave front; and a convergent focus is formed in the position in the direction of the optical axis of the to-be-measured optical element. The convergent spherical wave front returns along a symmetrical light path position when being irradiated onto the to-be-measured optical element, so that the convergent spherical wave front and a reference wave front in the interferometer form an interference fringe, and by monitoring the interference fringe, and adjusting the large five-dimensional adjustment rack, the position of the to-be-measured optical element in the direction of the optical axis is controlled at a wavelength order.

The invention discloses a GNSS (Global Navigation Satellite System)-based Kalman relative positioning method. The method comprises steps: 1, a double difference carrier phase is built; 2, relative positioning of a triple difference carrier phase is carried out; 3, a Kalman filter dynamic model is improved adaptively; 4, the Kalman filter state is updated; 5, satellite geometrical configuration changes are processed; 6, Kalman filter measurement is updated; 7, integer ambiguity is solved; and 8, relative position information is outputted. The method is better adaptive to relative positioning of a variably accelerated motion carrier, the precision of ambiguity floating point solution and the integer ambiguity fixing success rate are improved, the initialization time of a relative positioning system is shortened, and the real-time performance and the reliability of relative positioning are enhanced.

The invention relates to a cost benefit analysis method of a renewable energy source distributed generation operation mode. The method comprises the following steps: determining all operation modes of the renewable energy source distributed generation; performing match analysis on the distributed contribution and a load curve, and determining different types of electric quantity; determining property right demarcation points, boundary conditions and calculation parameters of the distributed generation under different operation modes; determining the expense composition and income composition of the distributed generation in the whole life cycle under different operation modes; determining the total expense present value, annual average expense present value, total income present value and annual average income present value of the distributed generation in the whole life cycle under different operation modes; determining the benefit/cost value PI of the distributed generation in the whole life cycle under different operation modes; and selecting the scheme with the greatest benefit/cost value, and determining the optimal operation mode of the distributed generation. The method provided by the invention lays a firm theoretical foundation for making supporting policies for the renewable energy source distributed generation and distribution network.

The invention belongs to the technical field of computer visions, and discloses a method for increasing the number of feature points in a weak texture region of one image. The method comprises the steps: carrying out the detail extraction of one image, and obtaining the detail texture map of one image; building a Gaussian difference pyramid for an original image, and detecting corners; carrying out the parallel computing of the detail extraction and the Gaussian difference pyramid, carrying out the corner extraction of the detail map, and finally forming a feature point set through merging; generating a binary descriptor with rotation invariance on the corresponding image for the extracted feature points; carrying out the matching and filtering of the descriptors of two images, and obtaining a correct matching point set. The method employs a binary operator, and can generate a description vector through simple summation and comparison. Meanwhile, the method employs the parallel computing of corner detection and spatial extreme point detection, greatly improves the stability of feature points, is low in coupling degree of calculation steps, is high in parallelism degree, and is very suitable for hardware implementation.