877results about How to "High engineering application value" patented technology

The invention relates to a rotary table upright type five-freedom-degree mixed-connecting spray painting robot which is large in work space and has certain flexibility. The rotary table upright type five-freedom-degree mixed-connecting spray painting robot comprises a foundational series-connection movement unit and a tail end parallel-connection spray painting operation unit. The foundational series-connection movement unit has two rotation freedom degrees and a movement freedom degree and is composed of a machine body rotation joint, a machine body lifting movement joint and a horizontal rotation joint. The tail end parallel-connection spray painting operation unit has two movement freedom degrees and is a plane parallel-connection mechanism composed of a large arm, a small arm, a connecting rod, a crank, a movable platform and the like. The rotary table upright type five-freedom-degree mixed-connecting spray painting robot has the advantages of being wide in work range, small in number of driving joints, compact in structure, easy to manufacture, convenient to control, capable of enabling the modularization to be achieved easily and the like.

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 an HVDC commutation failure fault diagnosis method based on valve voltages or valve currents. The method comprises the following steps that a commutation failure mechanism and commutation failure influence factors are analyzed; commutation failure process analysis is carried out, and a commutation failure criterion is determined; an HVDC model contravariant side equivalent circuit is built, and a commutation failure critical inductance value is determined; whether the diagnosis result is accurate or not is verified through simulation. According to the fast commutation failure diagnosis method based on the converter valve voltages or the valve currents, the theoretical analysis and stimulation result proves the accuracy and effectiveness of the method, no blind diagnosis area exists, and the method is simple in theory and easy to implement, and has certain project 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 an aviation titanium alloy 3D free bend warm forming device and a forming method. The forming method comprises the following steps: (1) the free bend forming test is performed for an aviation titanium alloy pipe heated to a specific temperature before bending of a pipe in forming space to obtain a relation curve between an eccentric distance U of the pipe at the specific temperature and a bending radius R; when the titanium alloy bent pipe is technologically analyzed, the eccentric distance Un is firstly obtained from the curve when the bending radius is Rn; and then, Un is substituted into a three-dimensional free bend forming analysis formula to obtain forming process parameters aiming at the complex bent pipe; and (2) in the forming process, an infrared temperature measurer measures the surface temperature of the pipe in real time; and the real-time feedback adjustment is performed for the feeding speed of the pipe along a Z axle to guarantee stable heating temperature of the pipe. As the local induction heating is performed for the titanium alloy pipe, the forming method can preferably eliminate such defects as low plasticity, high deformation resistance and difficult bending formation in the cold bend forming process of the titanium alloy pipe, and improves the forming quality of the aviation titanium alloy bent pipe.

The invention discloses the service field of the operating state of a power transmission and transformation device, in particular to an automatic identification method of an insulator chain infrared image. The technical schemes are that feature points of a monitoring image and a pattern plate image are extracted and a feature is described, thus a description vector quantity is produced and the feature is matched. Affine transformation is carried out on the pattern plate image, thus the position of the pattern plate image in the monitoring image is obtained. An identification area of the insulator chain is obtained by using the boundary of the position in the monitoring image. The insulator edge in the pattern plate image is detected by using an edge detection method, thus a coordinate of an edge point is obtained. Affine transformation is carried out on the edge point of the pattern plate image in the identification area of the insulator chain of an insulator chain infrared monitoring image, the edge point of the pattern plate image is indicated in the insulator chain infrared monitoring image, and thus the automatic identification of the insulator chain infrared image is completed. According to the automatic identification method of the insulator chain infrared image, the insulator chain in the infrared monitoring image can be precisely identified, thus the necessary technical support is provided for fault diagnosis and service of the insulator chain in the power transmission and transformation.

The invention relates to a high-temperature pipe fittings radial deformation sensing device. A clamping device comprises a fixture 5 and a fixture 13. A positioning device is arranged in the median part of the fixture 5 and presses out a detected element 18. Stabilizer rods 15 are symmetrically arranged on the two ends of the fixture 5, are axially perpendicular to the detected element, and presses out the detected element by means of a spring 16 so as to form a stabilizing device. A measuring probe 7 in a measuring device is over against a supporting stick 4 and is arranged on the fixture 13. One end of the measuring probe presses against the detected element by means of a probe spring 17, and the other end is intimately contacted with a fine pitch bolt 8. The free ends of two elastic elements 11 which are provided with strain gauges are contacted with the fine pitch bolt 8 and are intimately jointed with the horizontal plane of a zero adjustment sheet 9. The strain gauges 12 are connected with a test terminal 19. The high-temperature pipe fittings radial deformation sensing device of the invention has the advantages that the installation is convenient, the usage temperature can be 1100DEG C, and the test result is exact and repeatable. The high-temperature pipe fittings radial deformation sensing device of the invention is applicable to the detection of the radial deformation of various metal and nonmetal material cylindrical pipe fittings and specimens.

The invention relates to a method for distribution system planning and particularly relates to a distribution network power supply area division method based on comprehensive evaluation. The method comprises the following steps: first, a power supply area to be divided is selected, the status of the power supply area and main factors influencing power supply area division are analyzed and an evaluation index system for power supply area division is established; then, an appropriate method is selected to set weights of evaluation indexes and evaluation standards; and finally, comprehensive evaluation is carried out to determine a division result of the power supply area. The method overcomes the defect that the prior method carries out qualitative classification only based on experiences of experts or leaders. Based on factors influencing distribution network power supply area division, a comprehensive evaluation method is fully utilized and the defect that power supply area division can only be carried out on the basis of quantitative indexes in a clustering analysis method is overcome. The power supply area can be comprehensively evaluated, the weights of the indexes can be adjusted according to actual situations of various regions, the accuracy of the method is greatly improved, and the method has very high engineering application values.

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.

The invention discloses an active voltage arc-extinction method applicable to a single-phase earth fault of a medium voltage distribution network, and relates to the technical field of fault self-recovery of a medium voltage distribution network. The active voltage arc-extinction includes the following steps: a. continuously measuring bus three-phase voltage, zero sequence voltage and each outlet three-phase current, and when a single-phase earth fault is detected, conducting fault phase selection; b. designating a threshold Ires.g of a fault phase current magnitude and a threshold Ures.g of a fault phase voltage magnitude of a fault feeder; c. measuring the voltage and current of the fault phase, comparing the fault phase current magnitude of the fault feeder with Ires.g. According to the invention, the method can effectively increase the arc extinction of a low-resistance earth fault, and compensate current at a fault point as much as possible while excess voltage is effectively controlled, and ensures that arc at the fault point can be reliably extinct. According to the invention, for non-linear resistance earth, the method is also effective simply by changing program codes in current active compensating apparatuses, and has higher values when applied to engineering.

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 provides an insulator string fault detection method based on infrared image temperature distribution law and a BP neural network. The method comprises the steps that the rectangular target area of an insulator string in an infrared image is extracted through manual and color space conversion; the length feature of the target area is calculated through image processing techniques such as binarization, Hough transform and rotation to extract insulator steel caps and disk surface areas respectively; an image temperature matrix and a segmentation result are used to calculate the average value of each steel cap and disk surface area as the feature quantity, and a K-Means clustering algorithm is introduced in the calculation process to remove background pixels; in the order of insulators from the low voltage end to the high voltage end, temperature eigenvectors of the steel caps and disk surfaces are formed respectively; and based on the temperature distribution law of the insulator string, an insulator string fault diagnosis model based on the BP neural network is established. The detection method provided by the invention has high recognition accuracy.

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 relates to a method for identifying damage to a large structure, in particular to a method applicable to identifying damage to a space grid structure. The method includes performing substructure-oriented damage location for the integral structure as a research object, in other words, finely dividing the space grid structure into substructures according to a formation rule of the space grid structure, and identifying possibly damaged substructures by a probabilistic neural network; and performing node-oriented damage location for each integral substructure as a research object within a reduced range, locating damage to specific bars of integral nodes as research objects and determining damage degrees of the specific bars. The method has the advantages that the method is applicable to identifying damage to large structures such as bridges, power transmission towers and high-rise buildings, and is particularly applicable to identifying damage to long-span space grid structures with numerous nodes and bars, the structure of the neural network is simplified, the nonlinear mapping ability and the damage identifying efficiency are improved, and the method has certain engineering practical value.

The present invention relates to a wireless network-based micro-seismic fracturing real-time monitoring system and monitoring method. The system is mainly composed of a server, wireless micro-seismic data acquisition stations, a field hand-held inspection terminal and a wireless AP. In the system, interconnection is realized by WIFI, and the UDP and FTP are adopted to perform communication; according to the acquisition station, an STM32F207 processor is adopted as a main control unit, a 32-bit ADS1282 is adopted as a data acquisition unit, and therefore, data acquisition accuracy can be improved, and the power consumption and cost of the acquisition station can be decreased; a network structure is in a master-slave AP topological structure and forms a complete fracturing monitoring system together with the server and the acquisition stations, and therefore, the problems of short wireless transmission distance and slow download speed can be effectively solved; and the hand-held device and the acquisition stations perform data exchange through using low-power Bluetooth communication, so that data transmission of a data flow form can be realized. The system integrates the advantages of each part, can ensure strict data synchronization acquisition and real-time and reliable fracturing state monitoring and has a high engineering application value.

The invention provides a nonlinear fractional order auto disturbance rejection damping control method of doubly fed induction generators. The method is characterized by comprising the following steps: establishing a multi-unit system mathematical model comprising the doubly fed induction generators; constructing a mathematical model comprising a fractional order system through diffeomorphism mapping; compensating system parameters and state variables which are included in pre-control variables through design of an extended state observer in an auto disturbance rejection controller; and selecting a fractional order auto disturbance rejection control law and the like. The method provided by the invention effectively improves the damping level of a doubly fed induction generator power grid, effectively estimates model errors and external uncertain disturbance, eliminates errors by use of feedback linearization, effectively enhances the power oscillation inhibition capability of the doubly fed induction generators, reduces investment of additional equipment and improves operation benefits of the power grid, and also has the advantages of scientificalness, rationality, simplicity, effectiveness, quite high robustness, high engineering application value and the like.

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 belongs to the field of optimization of control parameters of a direct current transmission system, and relates to a method for optimizing control parameters of a hybrid multi-end directcurrent transmission system. The method comprises the steps of: establishing a detailed nonlinear state space model of LCC and MMC converter stations for the hybrid multi-end direct current transmission system, and realizing the simultaneousness of the converter stations through a phi type equivalent direct current transmission line to figure out a steady state balance point state value; performing Taylor expansion on the constructed nonlinear state space model, ignoring high-order terms, and constructing a universal and detailed small-interference dynamic model of the hybrid multi-end directcurrent transmission system; constructing a penalty function associated with a feature value to serve as an objective function by using a feature value of a state matrix of the small-interference dynamic model as the basis for the small-interference stability analysis of the system; and performing optimization solution on the control parameters of controllers of the hybrid multi-end direct current transmission system by using a particle swarm optimization to obtain an optimal control parameter combination of the hybrid multi-end direct current transmission system. By adopting the method provided by the invention, the global optimization efficiency of the control parameters of the direct current transmission system is improved.

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.

The invention provides a configuration and constant volume method for charging facilities in an electric taxi fast charging station. The method comprises steps: a distribution law for station entering time intervals and charging durations of electric taxis is analyzed, and an in-station queuing model type of the electric taxi fast charging station is determined; the in-station investment cost and the user time cost in unit time are measured; an objective function for an in-station charging facility configuration optimization model and constraint conditions are determined; the in-station charging facility configuration optimization model is built, and the optimal configuration number of the in-station charging facilities is solved and obtained; and according to the optimal configuration number of the in-station charging facilities, the distribution capacity of the electric taxi fast charging station is calculated. The problems that the electric taxi fast charging station is low in load utilization rate, poor in distribution economy, unreasonable in facility number configuration and the like are solved, the electric taxi fast charging station investment cost and the user staying time cost are considered thoroughly, and reasonable resource configuration of the fast charging station is ensured.