39results about How to "Calculation results are accurate and reasonable" patented technology

The invention provides a method for predicting traffic noise of rail regions. The method comprises the following steps: dividing a test system into multiple subsystems and establishing corresponding sub-vibration equations; establishing a general vibration equation according to a coordination relation among multiple sub-vibration equations; calculating the sound source intensity of a region to be measured on the basis of the vibration equations and test parameters; drawing a corresponding noise map of the region to be measured on the basis of a noise map drawing unit and the sound source intensity, in order to predict the traffic noise of urban rail regions based on the noise map, wherein the sound source intensity is calculated on the basis of vibration responses of a coupled system (including a vehicle system, a rail system, a bridge-pile system and an environment soil system), so that the calculation results are accurate and reasonable, and are suitable for various vehicles and elevated rail structures; according to the method for predicting traffic noise of rail regions draws, the traffic noise of the region to be measured is drawn into the noise map, so that the noise management and control, the noise environment impact assessment, the public participation and the solution decision of the urban rail transit in our country become intuitive and convenient.

The invention relates to a digital auxiliary means suitable for the scope of medical treatment and health, in particular to an improvement for health diagnosis and demonstration by using a 3D human model. The invention provides an autonomous human disease diagnosis model, an artificial intelligence physical examination method and system, and a health assessment ocular demonstration method. Based on intelligent equipment, a user autonomously uses the autonomous human disease diagnosis model, the artificial intelligence physical examination method and system, and the health assessment ocular demonstration method, the related disease and the probability value are analyzed and searched through any input physiological data of the human body, then the calculation result is more accurate and reasonable, meanwhile, the various data information and the digital 3D human model are subjected to data connection, the data are loaded on the corresponding part of the model, the various data are highlighted, mapped and demonstrated and are intuitively shown on data processing equipment, so that the difficult problems that the speciality of the medical field is too strong and the content is abstractand not intuitive are solved.

The invention discloses a method for calculating the traffic capacity in a city expressway entrance interlacing region, and aims at filling a gap that there is short of a calculation method for effectively estimating the traffic capacity. The method comprises the following steps: 1, collecting related traffic parameters of an expressway interlacing region: 1), the mean time headway (shown in the description) of the traffic flow of an expressway trunk line Ls; 2), a critical time gap tC which allows ramp vehicles to merge into the expressway trunk line Ls; 3), the time headway th between two ramp vehicles; 4), the flow Q of the expressway trunk line Ls; 5), the distance L between a nasal tip N and a merging point of an accelerating vehicle La; 6), the design speed V1 of the expressway trunk line Ls; 7), the design speed V of a ramp; 2, calculating the probability distribution parameter K of the time headway of the expressway trunk line Ls; 3, building a method for calculating the traffic capacity of the ramp R; 4, improving the method for calculating the traffic capacity of the ramp R; 5, calculating the traffic capacity of the interlacing region through employing a formula (shown in the description), wherein CM is the traffic capacity of the interlacing region, the unit is vehicles / hour, and delta t is the time different of the ramp vehicle M2 and a trunk line vehicle M1 (unit is second).

The invention relates to a hydraulic and hydroelectric engineering construction diversion risk analysis technology and aims at overcoming the shortcomings of a traditional high rock-fill dam medium-term food season water retaining risk rate detection technology, providing a novel high rock-fill dam medium-term food season water retaining risk rate detection method, accurately and reasonably quantifying the medium-term food season water retaining risk rate and providing important basis for food season security risk assessment, construction schedule formulation and the like. The uncertainty of flood prevention food season elevation is considered in the method, and a high rock-fill dam project medium-term food season water retaining risk rate mathematical model is established. The uncertainties of shutdown day number and the daily average rising speed each month are considered, and a simulating calculation model of a dam body flood preventing flood season elevation is established. The randomness of the daily average rising speed each month is subjected to quantitative analysis. The randomness of hydroelectric, hydraulic and filling construction is comprehensively considered, and the water retaining risk calculation process is provided by coupling risk elements based on a Monte-Carlo method principle. The high rock-fill dam medium-term food season water retaining risk rate detection method is suitable for high rock-fill dam medium-term food season water retaining risk rate assessment.

The invention discloses a method and a system based on public security data to acquire multi-dimensional personnel relation intimacy. The method includes: acquiring relation person data, and calculating mutual single relation intimacy, namely expressing intimacy degree of relation through single behavior; using a weighted average algorithm to calculate various single relation intimacy to acquire multi-dimensional combined relation intimacy, namely expressing intimacy degree of relation through various behaviors; for relation persons, acquiring a relation degree recession function for recession in a linear, index or half-life period manner, and re-calculating relation intimacy between the relation persons to acquire a relation between the relation persons. Compared with the prior art, the method and the system have the advantages that improvement is made on the basis of an original method based on behavior number to calculate relation intimacy, so that the method and the system are suitable for multidimensional relation intimacy defining; the method and the system take handling of the relation intimacy time recession problem into consideration, thereby being high in practicability, wide in application range and easy to popularize.

The invention relates to a method for calculating gathered passenger numbers of platforms of urban rail transit stations by considering stranded passengers. The method comprises the following steps of establishing a calculation method for a quantity Prz(t) of stranded passengers entering a platform facility and a speed vj(t) of passengers entering the platform when passenger flow entering the platform is unidirectional; establishing a calculation method for a quantity P+rz(t) of stranded passengers entering the platform facility and a speed v+j(t) of passengers entering the platform in an up direction, and a quantity P-rz(t) of stranded passengers and a speed v-j(t) of passengers entering the platform in a down direction when the passenger flow entering the platform is bidirectional; forming passenger flow information by the quantity of the stranded passengers and the speed of the passengers entering the platform; dividing platform types of the urban rail transit stations according to physical structures of the platforms of the stations and position characteristics of the stations in routes; establishing a calculation method for the gathered passenger numbers P(t) of various platforms in combination with the passenger flow information and train running information; and judging passenger flow compositions and types of the platforms, and calculating the gathered passenger numbers of the platforms.

The invention provides a method for predicting the precipitation discharge based on a whole basin rainfall runoff and hydrodynamic model, which comprises the following steps: reading the data of the whole basin, calculating the discharge of each sub-catchment area through a distributed rainfall runoff model, and simulating the spatial distribution of the rainfall runoff; The discharge of each sub-catchment is brought into the river hydrodynamic model, and the water level and discharge of the river section are obtained by calculating the river hydrodynamic model. The invention fully considers the influence of rainfall on river water level and discharge, and can improve the accuracy of rainfall discharge prediction.

The invention discloses an impact force calculation method for a viscous debris flow, and application thereof. The calculation method comprises the following steps that: firstly, through sample experiment screening, determining a maximum particle size and a median particle size in a debris flow body, then, through sampling actual measurement, determining debris flow body density and debris flow kinematic velocity, and finally, carrying out calculation to obtain the impact force of the viscous debris flow. By use of the method, the influence of viscous debris flow particle graduation is comprehensively considered, the empirical coefficient of a dynamic pressure impact force calculation formula is corrected through a flume experiment, parameters required by calculation can be obtained through field survey, sampling and experiment analysis, the impact force of viscous debris flow motion can be reasonably determined, a basis is provided for viscous debris flow prevention and treatment engineering, and the method is suitable for the practical engineering design requirements of the viscous debris flow.

The invention discloses a method for determining content of coal pyrolysis resultant. The method comprises (1) obtaining the mass of C, H, O, N and S in 100 g dry ash-free basis coal by employing an element analysis process and respectively recording as mC, mH, mO, mN and mS g, and employing a coal industrial analysis process to measure the caloric value Q[net ,dnf] of combustible substances in dry ash-free basis coal and measure the mass of coke and volatile compounds generated after pyrolysis respectively to be mFC and mV g; (2) calculating the air quantity demanded by combustion of 100 g dry ash-free basis coal to be mA g according to a combustion chemical formula; (3) obtaining the value of a, b and c from a coal pyrolysis formula (1) according to the data in the step (1) by balancing the mole numbers of N and S elements, thereby respectively determining the substance amount of C, N and S elements in coal, and calculating x[i] values according to a formula (14) by employing a process of solving a minimum value of a function, thereby determining the content of H2O, CO, CO2, a hydrocarbon mixture and H2.

The invention discloses a wind-vehicle-bridge full-dynamic coupling analysis method and system. The method comprises the steps that a vehicle-bridge coupling vibration analysis module containing driver behaviors is constructed; an aerodynamic force result on the vehicle and the bridge at the current moment is calculated by adopting FLUENT and is transmitted to the vehicle-bridge coupling vibration analysis module; performing pneumatic simulation and vibration analysis on the aerodynamic force result through a vehicle-bridge coupling vibration analysis module to obtain a vehicle motion state and a track under the combined action of crosswind and a driver, and feeding back the vehicle motion state and the track to FLUENT; and based on a feedback result, adopting FLUENT to calculate an aerodynamic force result on the vehicle and the bridge at the next moment and transmitting the aerodynamic force result to the vehicle-bridge coupling vibration analysis module, and repeating the steps until the calculation is finished. In this way, bidirectional interactive calculation of vehicle aerodynamic force and vehicle state real-time updating is achieved, then wind-vehicle-axle full-dynamic coupling calculation is achieved, and the calculation result is more reasonable and accurate.

The invention discloses an evaluation method of multi-channel ac / dc cross-section transmission capacity and its constraint conditions, which firstly calculates an AC / DC power flow transfer ratio matrix D of the hybrid section and a load rate column matrix eta of an AC line, and then calculates the line load rate matrix lambda after N-1 fault of an AC line occurs according to the matrix, the matrixeta and the rated power of different AC lines; Judging whether the maximum element in the line load rate matrix lambda is 1, adjusting the power flow of the alternating current section according to the judging result, and then calculating the transmission capacity Pa of the alternating current section; Then calculating the transmission capacity Pd of the flexible HVDC section; Finally, determining the transmission capacity and constraint conditions of the hybrid section according to the transmission capacity Pa of the AC section and the transmission capacity Pd of the FDC section. The invention can realize the fast evaluation of the transmission capacity and the constraint conditions of the multi-channel AC / DC parallel section containing the flexible DC, and the calculation time is short,the calculation efficiency is high and the calculation result is more accurate and reasonable.

The invention discloses a shallow soil landslide early warning method based on a digital topographic map, which belongs to the field of landslide prevention and control engineering, and is characterized by comprising the following steps of: a, connecting a straight line with middle points protruding upwards along a contour line of the topographic map to serve as a middle line; b, determining an intermediate point; c, forming three point groups of plane curvature; d, taking the arithmetic mean value of the gradient as the gradient alpha of the landslide mass; e, according to a terrain DEM data distribution principle, assignments of all points in each grid are the same; f, taking an arithmetic mean value; g, calculating a topographic factor T of the potential landslide mass; h, calculating a rainfall factor R; i, calculating a shallow soil landslide early warning judgment value P; and j, performing early warning according to the shallow soil landslide early warning judgment value P. According to the method, the shallow soil landslide can be pre-warned without a large amount of historical observation data of the landslide, the dangerous landslide body is determined in advance, and the disaster prevention applicability and the pre-warning efficiency are greatly improved.

The invention relates to a dynamic critical rainfall calculation method based on an entropy decision method. The method comprises the steps of (S1) collecting and sorting actually-measured accumulatedrainfall and corresponding flood peak flow data of multiple floods in a drainage basin and dividing the data into multiple sample series according to an early-stage soil wetting degree and duration,(S2) performing edge distribution fitting on the collected sample series and selecting distribution with a best fitting effect by using K-S inspection, (S3) constructing joint distribution by utilizing a Frank Copula function to obtain joint probability distribution of accumulated rainfall and corresponding flood peak flows under different early-stage soil wetting degrees and different duration conditions, and (S4) plugging the joint probability distribution and corresponding parameters into a Bayesian utility function and an expected utility-entropy risk function formula, considering conditions of subjective factors, objective factors and the simultaneous influence of the subjective factors and the objective factors, and minimizing the utility function and risk to obtain critical rainfallvalues under different early-stage soil wetting degrees and under different duration conditions. According to the method, a risk decision-making method is used to solve a problem of determining mountain torrent disaster early warning indexes.

The invention discloses a shear force evaluation method for steel beam steel pipe column nodes, in particular a shear force evaluation method for asymmetrical steel beam square steel pipe column nodes. The evaluation method comprises the following steps: (1) presetting the geometrical dimensions of the high and low steel beam square steel pipe column nodes, the type of steel used and the grade ofconcrete; (2) calculating the side length of a concrete core zone and the cross section area of a steel pipe web; 3) determining the shear force of a steel pipe; (4) determining the ultimate compressive bearing capacity of the concrete in the core zone; and (5) superimposing the bearing capacities of a steel pipe column and the concrete in the core zone to obtain the shear force of the core zone of the nodes. The method solves the problem of shear force evaluation of the asymmetrical steel beam square steel pipe column nodes, fills the gap in the calculation method of the shear force of this kind of nodes, can be used as a reference for practical engineering design, and is wider in application and more universal.

The invention discloses a near-dam-area sub-drainage-basin unit division method and device and a storage medium. The method comprises the steps that a near-dam-area water system and a drainage basin are generated based on DEM data; in combination with the generated near-dam region water system and drainage basin, extracting the landform of the near-dam region drainage basin based on DEM data; drawing a rainstorm center map in combination with DEM data and rainfall data, and performing sub-basin unit division on the basin of the near-dam area according to the landform and the rainstorm center map; the method can clearly reflect confluence production modes of different underlying surfaces such as mountainous regions and plains, reflects the influence of a rainstorm center on confluence production, enables sub-basin unit division to be more reasonable, facilitates the consideration of basin confluence production physical characteristics, improves the flood forecasting precision, guarantees the stable and reliable data source, guarantees the accurate and reasonable calculation result, and is suitable for large-scale popularization and application. The method solves the problem of how to divide the watershed of the near-dam area in the humid area, and is beneficial to deep development of sub-watershed division research.

The invention relates to a turbine blade abrasion monitoring method based on historical data. The method comprises the steps: collecting historical stable operation data of a unit; obtaining the flow of each stage group through one-dimensional thermodynamic calculation; calculating the equivalent throat area of the level, and establishing a historical thermal data file; collecting unit operation data in real time; calculating a real-time equivalent throat area; comparing the equivalent throat area data calculated in real time with a historical data file, judging whether abrasion occurs or not, and if the blades are abraded, defining a difference value between the equivalent throat area calculated in real time and historical data as a wear coefficient, determining the wear degree by taking the wear coefficient as a wear index, sending out a corresponding early warning signal according to the determined wear degree, and generating a wear trend curve. The wear degree of the turbine blade can be monitored in real time; the abrasion problem can be found in time, blade abrasion fault prediction is achieved, and further deterioration of blade abrasion is avoided; meanwhile, the calculation result is more reasonable and accurate.

The invention relates to a calculating method for the ecological water demand of plecoglossus altivelis in the fattening period. The calculating method comprises steps as follows: analyzing functionalcharacteristics of fattening farm habitats of the plecoglossus altivelis in the fattening period; analyzing characteristics of periphytic algae; analyzing factors affecting baits of the plecoglossusaltivelis; calculating water velocity and water demand in non-flood period; calculating water velocity and water demand of a fattening farm of the plecoglossus altivelis in the flood period. The conventional calculation for the ecological water demand is short of analysis for problems about the environment required by actual survival and growth of organisms. According to the method, the plecoglossus altivelis which is an endangered species is selected as an ecological protection objective, the functional characteristics of the fattening farm habitats of the plecoglossus altivelis in the fattening period are analyzed firstly, then flow conditions required by the habitat functions are further analyzed, and finally, the calculating method for the proper ecological water demand required by survival and growth of the plecoglossus altivelis in the fattening period is proposed. With the calculation of the ecological water demand, habitat environments and functions of endangered fishes are repaired and improved, the calculation and evaluation method of the ecological water demand is enriched and developed, and scientific basis is provided for biodiversity protection and water resource scheduling management.

The invention relates to an artificial bee colony algorithm-based steady-state performance evaluation method for a self-excited generator. The method comprises the following steps of (S1) building a single-phase equivalent circuit model for the self-excited generator; (S2) carrying out optimization control on impedance, excitation impedance and a rotating speed of the self-excited generator by using an artificial bee colony algorithm; (S3) calculating stator current, terminal voltage and load current for analyzing a steady-state model of a self-excited induction generator; and (S4) obtaining excitation reactance, frequency and voltage by using a numerical calculation method, comparing the result obtained by using the numerical calculation method with an optimization result obtained by using the artificial bee colony algorithm and verifying the effectiveness of the artificial bee colony algorithm. According to the artificial bee colony algorithm-based steady-state performance evaluationmethod for the self-excited generator, the steady-state characteristic of the self-excited induction generator is researched by using the artificial bee colony algorithm, special requirements for aninitial solution in the numerical calculation method are avoided, a real part of an admittance does not need to be separated from an imaginary part, the calculation process is simplified and the calculation result is more accurate and reasonable.

The invention discloses a lock head construction emulation method considering soft foundation consolidation and concrete creep. The lock head construction emulation method comprises the steps of: 1, determining thermal parameters of concrete and a soft foundation, a creep calculation parameter of the concrete, a consolidation parameter of the foundation and an elastoplasticity mechanical parameter of the foundation; 2, establishing a finite element network of a lock head structure; 3, determining time steps of calculation, an initial temperature of the concrete and an equivalent heat emission coefficient of a concrete heat insulating measure; 4, according to the thermal parameters, a time-history analysis step, an initial condition and an air temperature, predicting and calculating a temperature field; 5, calculating a pore pressure and ground stress distribution of the excavated soft foundation; and 6, applying a temperature load, a foundation initial pore pressure, a ground stress of the foundation and other loads which need to be considered to carry out stress calculation. The method disclosed by the invention comprehensively considers a creep feature of the concrete and an elastoplasticity consolidation feature of the soft foundation, and can relatively perfectly predict a stress of the lock head structure in the construction period.

The invention discloses a method for determining content of coal pyrolysis resultant. The method comprises (1) obtaining the mass of C, H, O, N and S in 100 g dry ash-free basis coal by employing an element analysis process and respectively recording as mC, mH, mO, mN and mS g, and employing a coal industrial analysis process to measure the caloric value Q[net ,dnf] of combustible substances in dry ash-free basis coal and measure the mass of coke and volatile compounds generated after pyrolysis respectively to be mFC and mV g; (2) calculating the air quantity demanded by combustion of 100 g dry ash-free basis coal to be mA g according to a combustion chemical formula; (3) obtaining the value of a, b and c from a coal pyrolysis formula (1) according to the data in the step (1) by balancing the mole numbers of N and S elements, thereby respectively determining the substance amount of C, N and S elements in coal, and calculating x[i] values according to a formula (14) by employing a process of solving a minimum value of a function, thereby determining the content of H2O, CO, CO2, a hydrocarbon mixture and H2.

The invention belongs to the technical field of carbonate reservoir evaluation, and discloses a method and a system for quantitatively evaluating the eyelid of the carbonate source rock. The method for quantitatively evaluating the eyelid of the carbonate source rock comprises the following steps: using a micro-resistivity imaging logging instrument to collect data and process the data to obtain an electric imaging image; carrying out region segmentation on the electric imaging image to obtain each feature image; automatically recognizing an eyelid part in the image by using a convolutional neural network model; calculating the eyelid content by extracting the total number of eyelid part pixels, and continuous quantitative evaluation of the eyelid of the carbonate rock hydrocarbon source rock is achieved. According to the method, the eyelid content of the carbonate source rock can be continuously and quantitatively evaluated through micro-resistivity imaging logging, the calculation result is accurate and reasonable, and the exploration and development efficiency of the carbonate rock hydrocarbon source rock reservoir is improved. The method is low in cost, convenient to use, and accurate and reasonable in calculation result compared with a stratum core.

A rated capacity type selection method for a commercial vehicle valve-regulated lead-acid storage battery comprises the following steps: step 1, data acquisition and arrangement: acquiring power utilization information of each power utilization device of a vehicle to be selected, and sorting and classifying power utilization items and power utilization duration of the storage battery; 2, demand model establishment: establishing a starting electricity demand model, a static electricity demand model and a conventional electricity demand model and a parking high-power equipment electricity demand model respectively according to electricity demands; 3, calculating the consumed electric quantity: respectively calculating the required storage battery electric quantity of the starting power consumption demand model, the static power consumption demand model and the conventional power consumption and parking high-power equipment power consumption demand model, and selecting the maximum required storage battery rated capacity as the storage battery rated capacity selection requirement of the to-be-selected vehicle; and 4, verification of a model selection result: selecting a storage battery meeting the requirement, and installing the storage battery on the vehicle to be subjected to model selection for real vehicle verification. According to the design, the model selection method is scientific and reasonable, and the model selection result is high in reliability.

The invention provides a resonant reflection calculation method, device and electronic equipment for multi-row submerged embankments. The present invention first numerically solves the hydrodynamic characteristic parameters of a single row of porous submerged embankments, and then recursively calculates multiple rows of porous submerged embankments by using wide spacing assumptions The optimal design parameters of the multi-row submerged embankment are given. The invention has the advantages of high calculation efficiency, not limited by the influence of the shape of the submerged embankment, and can provide important reference suggestions for the engineering design of the multi-row submerged embankment.

The invention discloses a method for determining the axisymmetric dynamic response of a two-dimensional rock-socketed pile in saturated soil. First, based on the Hamiltonian dynamic principle, a motion equation of a two-dimensional elastic pile considering radial deformation is established and solved, and the equation containing unknown constants is obtained. Homogeneous solution of the displacement of the pile; then establish and solve the equation of motion of the soil based on the Boer porous medium theory, and obtain the general solution of the displacement and stress of the soil including the unknown constants; after uniformly determining the boundary conditions and continuity conditions of the pile-soil system, Based on the boundary conditions of the soil, the general solution of the displacement and stress of the soil with unknown constants, and the homogeneous solution of the displacement of the pile with unknown constants, the general solution of the pile foundation displacement with unknown constants is obtained; according to the boundary conditions of the pile foundation and The continuity condition between the pile and soil determines all the unknown constants in the general solution of the pile foundation displacement, obtains the fixed solution of the pile foundation displacement, and then obtains the frequency domain dynamic impedance and time domain velocity response of the pile top, and the obtained results are more reasonable and accurate.

The present application discloses a wind-vehicle-bridge full dynamic coupling analysis method and system, the method includes: constructing a vehicle-bridge coupling vibration analysis module including driver behavior; using FLUENT to calculate the aerodynamic force on the vehicle and bridge at the current moment The results are transferred to the vehicle-bridge coupled vibration analysis module; through the vehicle-bridge coupled vibration analysis module, aerodynamic simulation and vibration analysis are performed on the aerodynamic results, and the vehicle motion state and trajectory under the joint action of the crosswind and the driver are obtained and fed back to the In FLUENT; based on the feedback results, use FLUENT to calculate the aerodynamic results on the vehicle and bridge at the next moment and transmit them to the vehicle-bridge coupling vibration analysis module, and so on until the calculation is completed. In this way, the two-way interactive calculation of vehicle aerodynamic force and real-time update of vehicle status is realized, and then the full dynamic coupling calculation of wind-vehicle-bridge is realized, and the calculation results are more reasonable and accurate.