162results about How to "Meet actual engineering needs" patented technology

The invention discloses a vehicle detection method based on a convolutional neural network. The method includes the step S1 of collecting vehicle samples and non-vehicle samples and classifying the vehicle samples, the step S2 of preprocessing the samples, the step S3 of training a CNN vehicle detector, the step S4 calculating an average similarity table of a characteristic pattern, the step S5 of constructing a similarity characteristic pattern set, the step S6 of obtaining a CNN-OP vehicle detector, the step S7 of obtaining detection images, the step S8 of preprocessing the obtained detection images, the step S9 of constructing an image pyramid for the detection images, the step S10 of extracting characteristics, the step S11 of scanning characteristic patterns, the step S12 of classifying the characteristics, and the step S13 of combining detection windows and conducting output. An offline optimization scheme is put forward, the convolutional neural network which is completely trained is optimized, the strategy of scanning the windows after extracting the characteristics is adopted at the detection stage, and therefore the characteristics are prevented from being repeatedly calculated, and the detection speed of the system is increased.

The invention provides a particle swarm optimization-based least square support vector machine combined predicting method. The particle swarm optimization-based least square support vector machine combined predicting method comprises the following steps: according to data characteristics to be predicted, selecting proper single predicting models; properly combining different predicting methods; by making full use of useful information contained in the single predicting models, establishing an LSSVM (least square support vector machine) regression model; and through a PSO (particle swarm optimization), optimizing two core parameters which affect the precision of the LSSVM regression model and include a kernel function parameter g and an LSSVM regularization parameter C so as to obtain the optimal LSSVM regression model. By the method, the aims of improving the predicting precision and reducing predicting risks can be achieved; the convergence rate of the algorithm is greatly improved; and actual engineering needs can be met better.

The invention discloses a tunnel structure monitoring system and a tunnel structure monitoring method based on a distributed long-gauge fiber bragg grating. The system comprises distributed long-gauge fiber bragg grating sensors which are comprehensively distributed in a monitored range along the axial direction and the cross section of a tunnel; and longitudinal sedimentation of the tunnel and change conditions of various ring joints of the shield tunnel are monitored. The method comprises the following steps of arranging the distributed long-gauge fiber bragg grating sensors; and acquiring, transmitting and processing data. By the tunnel structure monitoring system and the tunnel structure monitoring method based on the distributed long-gauge fiber bragg grating, full-life monitoring on a tunnel structure in a construction period and a running period can be carried out, and longitudinal sedimentation, convergence deformation, joint deformation, duct piece internal force, strain and the like of the tunnel structure are dynamically monitored in real time.

The invention relates to the field of assembly concrete buildings, in particular to a modified concrete superposition board floor structure with shear keys and a connection method. The produced floor can serve as a floor applied in the assembly concrete buildings. An original superposition board floor comprises cast-in-situ layers and precast bottom boards which are arranged up and down, the shear keys are arranged on the precast bottom boards, the precast bottom boards are connected with the cast-in-situ layers through the shear keys, and a firm combination structure is formed. Two lateral faces of the original precast bottom boards are changed into slopes, and the contact area between the original precast bottom boards and the cast-in-situ layers is increased; four lateral faces of the precast bottom boards are made to be rough surfaces, and the friction between the precast bottom boards and the cast-in-situ layers is increased; lap joint rebar grooves are additionally formed in two sides of each precast bottom board, and lap joint rebars are arranged in the lap joint rebar grooves, so that equivalent transfer of tensile stress of the rebars at the bottoms of the boards is achieved. Meanwhile, steel rods with threads at the ends are embedded in a precast beam and matched with fixing steel boards and fixing nuts for use, and the superposition board floor structure is connected to the beam. Firm connection between superposition board floor structures as well as between the superposition board floor structure and the beam is achieved effectively through the above measures.

The invention provides a preparation method of an emulsified asphalt cold recycling asphalt mixture. The preparation method relates to the field of road engineering and includes the following steps: obtaining milling samples of old asphalt pavement, determining grading of filler, determining weight percentage of rough milling materials, fine milling materials, cement and mineral powder in raw materials, determining optimum moisture content a, determining optimum dosage of emulsified asphalt, determining optimum moisture content b, conducting checking and stirring the emulsified asphalt cold recycling asphalt mixture. The preparation method is rigor. Determination of optimum usage and optimum moisture content of emulsified asphalt gives consideration to the lubrication effect of water and asphalt in the molding process. The optimum moisture content and the optimum dosage of the emulsified asphalt are determined through checking. The preparation method adopts the processes of rotating, compacting, once molding and nourishment, accords with reality, and is reasonable and capable of meeting requirements for actual engineering.

The invention provides an improved particle swarm algorithm-based optimized configuration method of a distributed electrical connection power distribution system. The optimized configuration method comprises the following steps: 1, inputting optimized configuration calculation parameter data, initializing particles and the flying speed of a particle swarm and a connected distributed power factor; 2, selecting an optimized configured type, selecting an entrance according to distributed power optimized configuration scheme types, namely addressing tolerance, sizing location optimization and location optimization and tolerance with a specified access number N; 3, selecting an optimization configuration goal and recording power distribution system parameters and distributed power system parameters, wherein the parameters includ system grid loss and average voltage level parameters; 4, performing optimized configuration calculation, performing fundamental wave load flow calculation and harmonic load flow calculation under each particle to obtain the system node voltage, the system fundamental wave loss and the harmonic loss under the particle, and then calculating a system node deviation index and a system total loss index; and 5, checking and outputting the result of the optimized configuration calculation.

The invention provides a post-treatment integrated navigation method for surveying and mapping a track of an oil-gas pipeline. The post-treatment integrated navigation method provided by the invention comprises the following steps: carrying out integrated navigation and strap-down inertial navigation/dead reckoning combined navigation on a position without a GPS (Global Position System) modification point through strap-down inertial navigation, dead reckoning and GPS signals at a fixed point; at the GPS modification point, carrying out strap-down inertial navigation/dead reckoning/GPS combined navigation; compensating an error of a strap-down inertial navigation system, an attitude angle error and a scale factor error of a speedometer by using a kalman filter; meanwhile, utilizing a characteristic of processing non-instantaneity by system data, so as to repeatedly estimate and compensate various error items of the system until the system error is less than a set threshold value. Therefore, the system positioning precision is effectively improved, and the actual engineering requirements can be met.

The invention discloses a spacecraft attitude control method considering the uncertainty of a flywheel. The spacecraft attitude control method comprises the following steps of: in a case of considering that an attitude control mechanism of a tracking spacecraft, i.e., the flywheel, has the uncertainty, establishing an attitude tracking kinetic model between the tracking spacecraft and a free tumbling failure spacecraft; designing a nonsingular fixed time anti-unwinding sliding mode surface; and constructing an adaptive fault-tolerant sliding mode attitude tracking controller of the tracking spacecraft, and giving out a flywheel installation deviation angle range in which the controller can process a deviation angle. The control method disclosed by the invention has the characteristics of short response time, high robustness of the controller, energy saving and the like, and is suitable to apply to an attitude tracking control task that the tracking spacecraft with the flywheel uncertainty (installation deviation and fault) completes observation on the free tumbling failure spacecraft.

The invention discloses an image real-time correction output method for a broad-width scanner. The method includes the following steps: (1) a PC host sends a scanning instruction to an FPGA main control chip; (2) the FPGA main control chip controls N linear CCD image sensors to light on at the same time and controls a CCD transmission module to control the N linear CCD sensors to acquire images synchronously and at the same time, an algorithm module in the FPGA main control chip calculates two correction parameters Alpha and Beta respectively; (3) the linear CCD sensors acquire image data and transmit the image data to analog-to-digital converters and the analog-to-digital converters convert analog signals into digital signals and transmit the digital signals to the algorithm module in the FPGA main control chip to carry out processing; (4) the algorithm module calculates gray level values corrected by all photosensitive units; (5) the FPGA main control chip transmits the gray level values corrected by the photosensitive units to the PC host for processing so as to display images. The image real-time correction output method for the broad-width scanner is reasonable in design, high in processing speed and high in imaging precision.

The invention relates to a flexible tile adhesive which comprises a component A and a component B. Mass ratio of the component A to the component B is 3:1. The component A is prepared from the following raw materials (by weight): 30-46% of Portland cement, 40-56% of washed-out baked sand, 5-8% of quartz powder, 0.1-0.4% of an antifoaming agent, 1.5-2.2% of cellulose ether, 0.2-0.3% of starch ether, 1.5-3% of redispersible latex powder, 0.4-0.65% of a water reducer and 0.1-0.2% of polypropylene fiber. The component B is prepared from the following raw materials (by weight): 50-75% of an elastic polymer emulsion, 20-45% of water, 0.2-0.5% of a surfactant, 0.3-0.5% of a preservative, 1-3% of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate and 0.5-1% of an ethylene glycol antifreezing agent. The flexible tile adhesive has certain flexibility, is not easy to crack, hollow or fall, has good bleeding resistance, strong scratch resistance and shock resistance, and is easy to operate.

The invention discloses a rubber and metal framework bonding method, which is characterized by comprising six steps including preparation of rubber, cleaning of a metal framework, drying of the metalframework, covering of primer, covering of surface glue and vulcanization. Through the above method, bonding strength between rubber and the metal framework can be remarkably enhanced, and it is ensured that rubber has good processability.

The invention discloses a performance testing device for a partial discharge ultra-high frequency sensor. The device comprises a gigahertz transverse electromagnetic cell, a vector network analyzer, a polytetrafluoroethylene cover plate, a data processing computer, a checking antenna and the ultra-high frequency sensor to be tested. The vector network analyzer is used simultaneously as signal input and output ends, so that the device is high in cost performance and convenient to implement. The invention further provides a method for testing the performance of the sensor by utilizing the testing device. Time-domain and frequency-domain parameters representative of the performance of the sensor can be simultaneously given, and the advantages of reliability, accuracy and the like are achieved.

The invention relates to a method for non-destructively detecting segmented suction resistance of cigarettes and belongs to the technical field of cigarette quality detection. The method utilizes thebasic feature of flow conservation and quasi-series of air flows passing through a cigarette, realizes measurement of the suction resistance of each part of the cigarette based on a cigarette suctionresistance measurement method, independently acquires closed suction resistance data of a filter tip section and a cigarette section without mechanically separating the filter tip section and the cigarette section, determines that the permeation resistance of the whole filter tip laser-punched cigarette is composed of five permeation resistance values according to the cigarette suction resistanceformation theoretical basis that the pressure of flows passing through the cigarette is in direct proportion to the amount of flows passing through the cigarette and the ratio is cigarette permeationresistance (unit: Pa. s/ml) which is a physical property parameter, and calculates segmented suction resistance values of all parts of the cigarette. The method can satisfy the actual engineering demands of providing the basic support for cigarette product quality traceability, product design and process optimization.

The invention discloses a node importance-based power grid key node assessment method. According to the method, power grid key nodes are identified and protected emphatically, so that the method has an important significance on the prevention of significant power failure accidents. In the prior art, no simple and practical comprehensive evaluation method is available. On this background, firstly, an improved electrical distance is defined based on a power transfer distribution factor (PTDF). Secondly, the efficiency of a node and the initial weight of the node are defined. Thirdly, a method for constructing a node importance contribution coefficient matrix and a node importance contribution matrix is provided. On the above basis, a calculation method for calculating the node importance of a power grid is given. Therefore, the key nodes of a regional power grid can be recognized. Based on the method, the key nodes of the regional power grid can be recognized effectively and in real time according to the operation condition of the power grid. Therefore, the method meets actual engineering requirements and is a practical assessment method for the comprehensive assessment of the key nodes of the power grid.

The invention discloses a corrugated steel plate lining reinforcement parameter design method and structure based on tunnel lining defect detection. The corrugated steel plate lining reinforcement parameter design method is composed of five parts including corrugated steel plate geometric parameter design, corrugated steel plate geometric partitioning design, corrugated steel plate connecting component design, corrugated steel plate durability design and corrugated steel plate safety checking calculation, wherein the design is ended only when all safety checking calculations are passed, and otherwise, the design process needs to be executed again. The corrugated steel plate lining reinforcement parameter design method based on tunnel lining defect detection can provide a reasonable and effective method for selection and quantitative design of a tunnel corrugated steel plate lining reinforcing structure, and avoids blindness and randomness of a traditional design method, and the whole design process is clear in quantification, convenient to implement, safe, reliable, economical, applicable, scientific and reasonable and the corrugated steel plate lining reinforcement parameter design method has wide popularization prospects.

The invention discloses an image real-time correction output method for a linear array CCD imaging system based on an FPGA. The method includes the following steps: (1) a PC host sends a scanning instruction to an FPGA main control chip; (2) the FPGA main control chip controls CCD sensors to light on and controls a CCD transmission module to control the CCD sensors to acquire images and at the same time, an algorithm module in the FPGA main control chip calculates two correction parameters Alpha and Beta respectively; (3) the CCD sensors acquire image data and transmit the image data to analog-to-digital converters and the analog-to-digital converters convert analog signals into digital signals and transmit the digital signals to the algorithm module in the FPGA main control chip to carry out processing; (4) the algorithm module calculates gray level values corrected by all photosensitive units; (5) the FPGA main control chip transmits the gray level values corrected by the photosensitive units to the PC host for processing so as to form complete images which are then displayed. The image real-time correction output method for the linear array CCD imaging system based on the FPGA is reasonable in design, high in processing speed and high in imaging precision.

The invention belongs to the technical field of well digging and piling and particularly relates to well drilling equipment, in particular to a water hammer type well drill. The invention aims at providing a well drill which is low in noise, obvious in effect, high in energy using ratio and capable of drilling an inclined well when used in an area with soft soil and an uncomplicated geological condition. Water is drawn from a drain pipeline through a water pump and is supplied to a water hammer pipeline. When the water in the water hammer pipeline arrives at a certain speed, the valve is closed, once water hammer impact is produced, momentum of the water flow is transformed into the momentum of the whole well drill, and a soil layer is hit once. Then, a valve plate is opened under the action of a valve plate starter, the water flow flows again, enters into the drain pipeline after being shunted through a shunting cavity and is sent to a water outlet of the water pump, and once circulation is finished. A direction controller controls the drilling direction of the well drill. The two-way oil-pressure adjustment device is rigid in noise control and conducts drilling operation in the area with the soft soil and the uncomplicated geological condition.

The invention discloses a deck arch bridge data acquisition system and deformation distribution identification method and equipment. The data acquisition system includes long gauge length FBG sensors.The sensors are arranged near four division points of an arch ring structure along the length direction of a bridge and the tops and bottoms of arch ring sections near a structural column and two columns. The identification method is based on the data acquisition system, processes acquired sensor data, separates monitored coupling strain data, and finally identifies deformation distribution of the arch bridge by a curvature load method. According to the invention, a sensor arrangement scheme is determined according to strain distribution characteristics of the unit sections and longitudinal unit of the bridge to realize effective distribution monitoring of the arch bridge. Meanwhile, the arch bridge deformation distribution identification method based on curvature change is established through complex stress analysis of the arch bridge, which can effectively and quickly complete a deformation monitoring task of a long-span deck arch bridge, is expected to be applied to engineering practice, and can bring huge economic and social benefits.

The invention discloses a method for detecting and identifying foreign matters of a rail wagon, which comprises the following steps of: performing sliding window blocks on an input image, and obtaining a corresponding number of local detection areas according to the sizes of the sliding windows; carrying out foreign matter suspected candidate region positioning on all the local detection regions one by one, and screening and obtaining foreign matter candidate regions suspected to have foreign matters; carrying out foreign matter secondary classification and identification on the foreign mattercandidate area, and judging whether the foreign matter is a foreign matter and a specific category to which the foreign matter belongs; and outputting foreign matter information according to the category of the foreign matter category and a preset severity level. The method has the beneficial effects that the high-real-time and high-accuracy automatic detection and identification of the foreign matters of the rail wagon can be realized, the method has very high detection precision and relatively low false identification rate, meanwhile, the relatively high detection speed also meets the actual engineering requirements, the missing detection and false alarm conditions are greatly reduced, the burden of workers is reduced, and the potential safety hazard is reduced.

The invention discloses an unstructured boundary layer grid generation method based on a grid framework, which comprises the following steps of: S1, performing digital-to-analog discretization by utilizing Pointwise to generate a surface grid which is used as input of the method; S2, extracting supporting points according to geometrical characteristics of the surface grid, and calculating a frame supporting line through the supporting points and normal vectors of the supporting points; S3, obtaining a contour line through a radial basis function interpolation method; S4, on the basis of the contour line and the surface grid, utilizing the radial basis function interpolation again to obtain a boundary layer top grid; and S5, generating an internal grid of the boundary layer through linear interpolation. It can be seen that the precision of the grid generated through the method meets the use requirement by conducting simulation experiments on the automation of generation and the control capacity of the quality of the local grid.

The invention discloses a geometric gradual change folding line pipe. The folding line pipe can be divided into a plurality of modules in the axial direction and peripheral direction, and each module is pre-folded according to a specific paper folding pattern. The modules are pre-folded according to two basic paper folding patterns. The geometric size of each module in the folding line pipe can be changed through seven methods of interpedently changing the side length, included angle and number of the modules, simultaneously changing the side length and included angle, simultaneously changing the side length and number, simultaneously changing the included angle and number, and simultaneously changing the side length, included angle and number, the seven changing methods can be carried out separately or simultaneously in the axial direction and peripheral direction of the folding line pipe, and therefore geometric gradual change of the geometric gradual change folding line pipe in the two directions is realized. The geometric gradual change folding line pipe is novel in structure, rich in design parameter, adjustable in rigidity and buffering and energy absorption performance and capable of meeting the structure bearing and impact resistance requirements under different conditions. The geometric gradual change folding line pipe can be formed by one flat plate through rigid folding, machining is convenient, production cost is lowered, and machining accuracy is improved.

The invention relates to the field of communication control and provides a bilateral switch switch-over single-phase and three-phase power supply and communication device and a control method thereof. The device comprises an AC power supply Va, a switch control circuit connected to the output end of the AC power supply Va, a plurality of power supplies connected to the output end of the switch control circuit and loads connected to the output ends of the power supplies, wherein the switch control circuit comprises a first switch device and a switch control device, the first switch device comprises a bilateral switch S1 which is connected with the output end of the AC power supply Va, the control end of the bilateral switch S1 is connected with the switch control device, a digital chip is connected into each power supply. According to the invention, an AC power supply line control end is added to the bilateral switch based communication device to achieve the purpose of simple communication. The digital chip in each power supply can be achieved simple with low cost; because of large signal information transfer, antijamming capability and communication reliability are high.