37 results about "Structural decomposition" patented technology

The invention discloses a tree species classification method based on a LiDAR (Light Detection and Ranging) false-vertical waveform model. The method comprises a step 1 of collecting data using an airborne small-light spot full-waveform LiDAR sensor, in order to obtain complete waveform information, wherein the sampling interval is 1ns; a step 2 of preprocessing LiDAR waveform data; a step 3 of establishing a false vertical wave through waveform structural decomposition and comprehensive waveform recombination; a step 4 of carrying out single tree segmentation and information integration; a step 5 of gathering point cloud attributes within in a single tree range and calculating a comprehensive waveform characteristic parameter; and a step 6 of carrying tree species classification with a support vector machine classifier. With the tree species classification method, acquired LiDAR energy signals can be enhanced; on the basis of single tree segmentation, comprehensive waveform characteristic variables are extracted from multiple dimensions, and thus classification accuracy of tree species in the subtropical forest is obtained and improved by a single data source; spatial and temporal variation of main tree species of a forest type can be well embodied; through experimental verification results, the method provided by the invention is improved by 10% in terms of overall precision compared with other LiDAR-employing tree species classification methods; and the Kappa coefficient is improved by 0.1.

The invention relates to a large structure dynamic optimization design method based on structural decomposition. In three-dimensional modeling software, a geometric model of a large member is established, a size variable of an external frame forming a structural member is recognized, and a basic style and the size variable of an internal composition unit are recognized; the external frame of the structural member is subjected to topological optimization, the size of the internal composition unit is optimized, and size data are acquired; the optimized size data are imported into Isight-FD software, optimization iterative analysis is performed on different combinations and different size configurations of the external frame and the internal composition unit according to the constraint condition and the target function, and an optimization result is output. The method is widely applied to lightweight and weight reduction design of a large and heavy-load complicated structure part and has the advantages of capability of realizing design from the simple into the deep as well as fastness and reliability. Due to the robustness of an algorithm, the geometric structure meeting the requirements of mechanical properties can be found only through a few sampling points, and reliable technical support is provided for structure design work of large heavy-load equipment at the present stage.

The invention discloses a mechanical device programmed frequency amplitude modulation (PFAM) structural decomposition method. The method comprises the following steps: building a part spectrum, a working condition spectrum, a load spectrum, a function spectrum and a fault spectrum; determining sub-spectrum element functions, and establishing a functional matrix to achieve spectrum -function mapping; determining a corresponding relation between functions and actions to achieve the function-action mapping; and determining infinitesimal corresponding to the actions to achieve action-infinitesimal mapping. According to the method, engineering problems of complex structure, varying working conditions, varying loading, multiple failure modes of a complex mechanical device are solved to enhance quality control and the reliability, and loads and functional failure in operation of the device can be subject to dynamic analysis, and a theoretical basis for improving and enhancing major quality features such as accuracy, accuracy service life and reliability of the complex device is provided.

The invention discloses a method for calculating reliability of a high-voltage direct-current power transmission system based on a universal generation function, comprising the following steps: assuming that elements in the high-voltage direct-current power transmission system are functionally independent of one another, and subjecting a structure diagram of the high-voltage direct-current power transmission system to equivalent transformation; subjecting the high-voltage direct-current power transmission system subjected to equivalent transformation to serial-parallel structural decomposition so as to obtain subsystems of the system; acquiring element reliability parameters in the high-voltage direct-current power transmission system, and calculating an element state-probability distribution function; subjecting the element state-probability distribution function to Z transformation to calculate an element U function; calculating the U function of each subsystem according to a functional function; calculating a state-probability distribution function of the high-voltage direct-current power transmission system according to an equivalent structure diagram of the high-voltage direct-current power transmission system. The invention provides state-probability distribution function calculation for HVDC (high-voltage direct-current) power transmission system in time domain, thus pre-judging real-time reliability and laying basis for the formulation of corresponding maintenance plans and optimization and decision.

The invention discloses an MYSQL (My Structured Query Language) database based SQL information acquisition and audit system. The MYSQL database based SQL information acquisition and audit system comprises an MYSQL communication message analysis module, an SQL statement syntax parsing module and an MYSQL communication error code module, wherein the MYSQL communication message analysis module is used for completely analyzing SQL statements of a communication message, parameters carried by the SQL statements and execution results of the SQL statements by analyzing a communication protocol between an application system client of an MYSQL database and the MYSQL database, and then data sources are provided for other modules; the SQL statement syntax parsing module is used for carrying out effective structural decomposition on the SQL statements so as to form an SQL operation log library; the MYSQL communication error code module establishes an MYSQL database error code library and analyzes the operating condition of an MYSQL database based application system by combining a database access request and a request response result with the MYSQL database error code library. The MYSQL database based SQL information acquisition and audit system has the advantages that the application system is not required to be subjected to any configuration change and modification, any effect on the normal operation of the application system does not exist, and a powerful support for promptly understanding the operation state of the system can be provided for users and application system providers.

The invention discloses an energy demand prediction method based on structural decomposition. The energy demand prediction method comprises steps that an energy demand main influence factor is extracted, and a base year and a sample interval are selected, and an energy consumption condition is decomposed and analyzed, and then a production energy demand prediction model is established, and is used for prediction, and at the same time, a household energy demand prediction is carried out, and at last, the production energy demand and the life energy demand are added up to predict a total energy demand. By taking an energy consumption basic rule as guidance, the various main influence factors of the energy consumption are extracted, and are used for the prediction, and therefore the energy demand prediction method having universality is provided, and a simple and practical energy demand prediction formula is established, and in addition, the prediction method is practical and convenient, the accuracy of the prediction is improved by times, and the prediction method is easy to realize and popularize.

The invention relates to a vehicle body floor design method, and provides a simplified vehicle body floor design method based on a multi-component structure form in order to solve the problems that anexisting single-component vehicle body floor structure designed through a topological optimization method is complex in shape, poor in economy and process feasibility and poor in vehicle body floor manufacturability. The method comprises the steps that 1, a simplified vehicle body floor initial design space finite element model is established; 2, establishing a multi-phase penalty material interpolation model for simplifying a vehicle body floor; 3, establishing a simplified vehicle body floor structure optimization target under multiple working conditions; 4, establishing material cost constraints of simplified vehicle body floor structure parts; 5, establishing processing cost constraints of simplified vehicle body floor structure parts; 6, establishing a simplified vehicle body floor topological optimization theoretical model in a multi-component structure form; according to the method, the manufacturing constraint is considered in the topological optimization process, and the multi-component form structure decomposition is realized in the topological optimization process, so that the economic benefit brought by topological optimization and the feasibility of an optimization scheme are improved.

The invention discloses an ultra-wear-resistant control valve, which mainly comprises a valve body, a valve core and a control mechanism. The valve body mainly comprises a valve cavity and a medium passage. The valve core is arranged in the valve cavity; an actuating mechanism is connected with the valve core, and is used for controlling the valve core to rotate; the valve core is provided with a sealing member and a regulating body; the sealing member and the regulating body are arranged separately; the sealing member can be used for sealing the medium passage; the regulating body can be used for regulating the flow of a medium in the medium passage. According to the ultra-wear-resistant control valve disclosed by the invention, by performing structural decomposition on an on-off function and a flow regulating function of a traditional valve, the wear-resistant property of the regulating body is higher than that of the sealing member; the sealing performance of the sealing member cannot be influenced by the impact and the wear of the medium to the regulating body. Meanwhile, by adding a scavenging function, the phenomenon that the valve is damaged due to the fact that a solid material is deposited in the valve cavity is completely eradicated, and therefore, the service life of the valve is greatly prolonged.

The invention discloses a regional production-caused SO2 emission change driving force quantification method. From the perspective of producers, through analyzing change of driving factors such as local technological advancement, local industrial restructuring, local consumption and external consumption, the structural decomposition method based on input-output analysis is adopted, the economic driving force for SO2 emissions in various industrial sectors in the region is made to be clear, change of SO2 emission caused by local production is analyzed. The method is advantaged in that through quantifying an industrial restructuring coefficient, a technological progress coefficient and final demand change, scientific basis and support are provided for targeted reduction of SO2 emission, andthe method has the important scientific value.

The invention discloses a project progress visualization method and system based on work structure decomposition, and the method comprises the following steps: receiving a project name and recognizinga project type to which the project name belongs, or receiving a specified project type; according to the project type, obtaining a corresponding project decomposition architecture diagram from a standardized project decomposition architecture diagram set, wherein the standardized project decomposition architecture diagram set is constructed according to project progress data of various project categories; generating an initial project progress chart, and visualizing the initial project progress chart, or visualizing the initial project progress chart and the project decomposition architecture chart; and receiving an editing operation on the initial project progress diagram and/or the project decomposition architecture diagram, and correspondingly updating the project progress diagram andthe corresponding project decomposition architecture diagram every time the editing operation is received. According to the invention, the progress chart can be quickly generated, and flexible editing can be carried out as required.

The invention discloses a method for preparing a frame-type raft frame or base from composite material. The method comprises 1, raft frame or base structure disassembling, 2, composite material partitioned structure molding and demolding, 3, partitioned molded structure machining, 4, partitioned structure preassembling, 5, adhered surface roughening, 6, partitioned structure bonding, 7, binding transition zone filling and connection zone strengthening layer molding, and 8, opening processing and surface conditioning. The frame-type raft frame or base prepared through the method has the advantages of high dimensional precision, high strength, high rigidity, light weight, good fatigue resistance, good damping performances and obvious vibration damping effect.

The invention provides a sewage treatment training method based on VR virtual technology and a training system. The method comprises: an overall introduction animation of a sewage treatment process and a display animation corresponding to each processing scene in a sewage treatment process are sent to a VR device when a request for starting a training is received; in response to the operator's operation, the overall introduction animation and the display animation corresponding to each processing scene are retrieved, and are transmitted to a display device one by one according to the operator's operation requirements, wherein each display animation is composed of multiple groups of display units which mainly comprise a device overall display unit in the corresponding processing scene, a processing demonstration unit in the corresponding processing scene, and a device specific structural decomposition unit in the corresponding processing scene. The invention combines the VR virtual technology with the sewage treatment process training, so that the training personnel can understand and learn the entire processing process as if they are on the spot.

The invention discloses a lightweight gypsum board. The lightweight gypsum board comprises a gypsum board main body, a gypsum board layer and an inner structure. The lightweight gypsum board and a preparation method of the lightweight gypsum board have the following advantages that 1, a fireproof layer is arranged in the gypsum board, structural decomposition or fracture can be prevented from being caused during burning, the fireproof performance of an overall structure is improved, meanwhile, a waterproof layer is arranged, water leakage or water seepage of the structure can be prevented being caused in overcast and rainy weather to influence the overall indoor aesthetic degree, and rainwater is prevented from infiltrating a room to pollute the inner part of the room; and 2, a shock cushioning layer is arranged on the inner structure to prevent tripods, supporting transverse plates and other structures on the inner part from losing supporting performance due to the fact that an outerstructure extrudes the inner part when the outer structure is extruded, an insulating layer is arranged to remain stable indoor temperature to prevent the indoor temperature from generating a large margin change, a sound absorption layer is arranged so that the external noise can be isolated, and a quiet and comfortable environment is provided for the inner part of the room.

The invention discloses a water intake tunnel progress risk analysis method considering an emotion factor. The method comprises the following steps: making an analysis assumption; analyzing to obtain a key path of the water intake tunnel; classifying and identifying factors influencing the progress by adopting a structure decomposition method; the shutdown probability and the shutdown day number of each working procedure of the water intake tunnel are obtained through analysis; constructing an emotion function; establishing a construction period prediction model considering emotion factors; establishing a construction period prediction model considering the surrounding rock category; fitting to obtain an expected construction period and completion probability model formula; and predicting the expected construction period and the completion probability. According to the method, in the prediction of the construction period and the completion probability, an evaluator can finely quantify the evaluation process and the evaluation result, the risk probability can be quantitatively obtained, more accurate reference can be provided for a decision maker to judge the risk, a more scientific basis is provided for formulation of measures, and the method has the advantages of being simple and clear in analysis process, high in accuracy and the like. The method has the advantages of high integration degree with engineering practice, scientific and practical calculation results and the like.

The invention discloses a fault isolation and positioning method for a complex system. The method comprises the following steps: carrying out the structural decomposition of a complex system accordingto the functions and performances of the complex system, forming subsystems or parts, and determining the function and performance quantitative evaluation indexes of the subsystems or parts; determining a quantized parameter deviation tolerance for the function and performance of the subsystems or parts; determining a fault transmission coupling factor according to a function transmission path between the subsystems or parts; analyzing the function and performance quantitative evaluation indexes, the fault transmission coupling factor, the working state and operation parameters in the operation process of the system, and determining fault isolation positioning parameters; realizing fault isolation and fault positioning through data analysis and logical reasoning of fault isolation positioning parameters. The method is a very effective method for improving the maintainability of the system, and the fault detection capability and the fault isolation capability of the system can be wellsolved.

The invention discloses a manufacturing and mounting method for an S-shaped bent pipeline of a large sintering flue. The method comprises the following steps that firstly, lofting is conducted on a pipeline model by using design software to obtain space curve parameters, and an actual model of a pipeline body is generated; secondly, an engineering drawing is generated from parts of the actual model of the pipeline body, section view is conducted on the engineering drawing, size parameters of plane placement of a pipeline are obtained, and structural decomposition is conducted on the pipeline according to the size parameters of the plane placement of the pipeline; then, steel plate lofting and composition are conducted according to a decomposed structure, and an actual blanking size is obtained; and finally, according to the actual blanking size, plate rolling is conducted to manufacture the S-shaped bent pipeline, and the manufactured S-shaped bent pipeline is hoisted. According to the method, the model generated through software can be accurate in size, only manufacturing errors exist when the model is in butt joint with field equipment, and finally a low-error assembly finished product is obtained; and the method plays an important role in on-site mounting, accurately displays a weight of a hoisted object as well as a mounting position and angle, and ensures construction safety and construction mounting accuracy.

The invention discloses a business process-oriented product design template generation method and system, and the method comprises the steps: (1) carrying out the structural decomposition and performance decomposition of a design object according to the demands of a customer; decomposing into a product layer, a component layer and a part layer; for each executable index, calculating the index correlation degree of the component layer and the part layer; (2) matching each executable index of the part layer with at least one evaluation participant, performing impression rating and process rating on each evaluation participant, and generating an evaluation interval of the evaluation participant; (3) calculating the product layer design association degree of the design scheme according to the index association degree and the evaluation intervals of the corresponding participants; calculating the distance between the evaluation interval of the customer demand scheme and the correlation degree of the corresponding product layer design scheme; and selecting a final scheme according to the distance, and curing matter elements of the final scheme into a final product design template. According to the method, an objective evaluation mode is adopted, and the product design template is efficiently and accurately obtained.

The invention discloses a rework production system transient performance analysis method based on an unreliable machine, a limited buffer area and customized production, and belongs to the field of production system engineering. The realization method comprises the following steps: carrying out structured modeling on the rework production system to form a physical model for analysis, and then carrying out modeling on the system state through a Markov method; on the basis of modeling, six transient performance indexes are defined for an unreliable machine, a limited buffer area and a customized production rework production system to evaluate system performance; according to the method, a dynamic decomposition-aggregation algorithm is provided, an auxiliary serial line and an auxiliary single-machine line are obtained through structural decomposition and state decomposition, then the auxiliary serial line and the auxiliary single-machine line are aggregated to obtain a dual-machine system, and the transient performance of an original reworking production system is predicted with high precision through the dual-machine system; the transient performance comprises productivity, consumption rate, completion time, inventory level of articles in process, hunger rate and blocking rate.