22 results about "Source area" patented technology

The invention discloses a fire positioning method based on heat source gradient identification, and belongs to the technical field of fire positioning, and the method specifically comprises the steps: obtaining a two-dimensional temperature distribution image of a fire scene; drawing an isotherm, and marking a potential fire source area based on a preset temperature threshold value; calculating the area of each potential fire source region, screening out an undetermined region from the potential fire source regions, calculating the temperature change rate of a central isotherm of the undetermined region in unit time, and screening out a candidate region from the undetermined region; marking a plurality of points on the peripheral isotherm of the candidate area at equal intervals, generating a temperature gradient path in the reverse direction of the temperature gradient based on each point, calculating the temperature gradient of each path, obtaining the candidate area with the temperature gradient mean value larger than a threshold value, and marking the candidate area as an initial fire source area; continuously drawing vertical lines into the central isotherm from a tangent line of the intersection point on the central isotherm, and marking the intersection point of the vertical lines as an initial fire source center point; according to the invention, rapid positioning of the initial fire source center in the fire scene is realized.

The invention provides a heat preservation box capable of rapidly replacing a cold source. The heat preservation box comprises a box body and cold storage plates; the box body is provided with a box door, a cold storage area, a control area and a cold source area are arranged in the box body, the cold storage area is separated from the control area and the cold source area through a middle partition board, and the control area and the cold source area are separated through a side partition board; a backflow partition board is arranged in the cold source area, the cold source area is divided into a cold source cavity and a backflow cavity through the backflow partition plate, the cold source cavity communicates with the lower portion of the backflow cavity, a plurality layers of cold sourceframes used for containing the cold storage plates are arranged in the cold source cavity, and the cold source cavity communicates with the cold storage area through an air inlet channel; an exhaustfan is arranged on the air inlet channel, the cold storage area communicates with the backflow cavity through a backflow channel, and an air blower is arranged on the backflow channel; a control module is arranged in the control area, a first temperature sensor is arranged in the cold storage area, the exhaust fan, the air blower, and the first temperature sensor are electrically connected with the control module; and box body, the middle partition plate and the side partition plate are all made of vacuum composite plates. According to the heat preservation box, the replacement efficiency of the cold source is improved.

The invention discloses a metropolitan corridor spatial form management and control partition delimiting method. The method comprises the following steps: S1, data acquisition and processing: acquiring and processing urban geographic information corresponding to each landscape unit in a selected area; s2, constructing a resistance surface: constructing the resistance surface, and updating the resistance surface in real time according to the change of the ecological environment and the land utilization type by adopting a dynamic resistance coefficient assignment method; s3, metropolitan corridor path determination: determining an urban ecological corridor path between any two ecological source lands based on a minimum cumulative resistance model; s4, centrality calculation and importance grading: performing centrality calculation on the urban ecological corridors based on a circuit theory, determining a centrality value of each ecological corridor, and performing importance grading on the urban ecological corridors according to the centrality values; and S5, constructing a suitability index system and determining a spatial range: determining a suitable construction spatial range and a priority level of the urban ecological corridor, and establishing the suitability index system based on machine learning.

The invention relates to the field of urban green land evapotranspiration zoning, in particular to an urban green land surface evapotranspiration zoning method and system based on impedance parameters, and aims to distinguish arbor, shrub and lawn transpiration in an urban green land. The method comprises the following steps: firstly, collecting and preprocessing vegetation morphological parameters, meteorological data, canopy surface temperature, soil heat flux, vegetation transpiration and vortex related flux data; calculating leaf boundary layer impedance and canopy stomatal impedance of each vegetation type by using a backstepping Penman-Monteith formula and an earth surface energy balance equation; determining the proportion of each vegetation type in the flux contribution source area through a flux footprint model, and reversely deducing the total aerodynamic impedance and the total stomatal impedance of the earth surface; solving aerodynamic impedance of each vegetation according to an earth surface energy balance equation and performing fitting correction; and finally, the corrected impedance parameters are substituted into a Penman-Monteith model to calculate the transpiration amount of each vegetation. According to the method, the problem of mismatching between single plant scale data and community scale data is effectively solved, and the evapotranspiration partition calculation precision is improved.

The present invention belongs to the technical field of urban planning. In order to solve the multiple bottleneck problems faced by existing heat island effect mitigation technologies, a method, system, device and medium for urban park site selection decision-making are proposed. The combined weights are assigned to multi-dimensional indicators respectively based on game theory methods, and hierarchical normalization processing is carried out; according to the conversion heat contribution degrees of different land cover types, the combined weights of surface temperature are decomposed to different land cover types in the target area; the normalized spatial distribution map corresponding to the surface temperature is associated with different land cover types to obtain the normalized heat contribution distribution map of different land cover types in the target area; the above are fused to generate the site selection suitability distribution map of the target area, and screening is carried out to obtain the urban park site selection scheme, avoiding the sensitivity loss of high heat source areas caused by the existing "one-size-fits-all" weighting, and ensuring that the park site selection decision can not only target the mitigation of the heat island core area, but also adapt to the diversity characteristics of the urban spatial pattern.

The present invention discloses a double-line protective net and its design method, belonging to the field of protective nets for rockfall impacts. The net comprises an upper layer and a lower layer for intercepting rockfalls from the same source area. The upper and lower layers are arranged sequentially from top to bottom along a slope, with the distance between the upper and lower layers exceeding the designed deformation of the upper layer when impacted, and the distance between the lower layer and the protected object exceeding the elongation of the lower layer. The double-line protective net and its design method improve the rockfall interception effect by setting up the double-line protective net.

The invention discloses a GIS-based pollution prevention and control management method and system, and belongs to the technical field of pollution management, and the method comprises the steps: collecting the wind power information at a plurality of time points and the actual concentration value of pollutants based on a detection sensor; measuring points with actual concentration values exceeding a first threshold value are determined and defined as pollution points, corresponding time points are defined as first time points, and a first sequence of actual pollutant concentration values and a second sequence of wind power information are collected and constructed by taking the first time points as starting points; the pollution points where the same pollutants are detected are defined as first correlation points, and first topographic data between the first correlation points are obtained based on the GIS data; performing pollution correlation analysis on the first correlation point based on the first topographic data, the first sequence and the second sequence, and extracting a second correlation point from the first correlation point; and analyzing the second association point by using a traceability model, and determining a pollution source area. According to the invention, the pollution source area generating pollution can be rapidly and accurately positioned.

The invention discloses an agricultural non-point source pollution prediction and traceability method, which relates to the technical field of agricultural monitoring, and comprises the following steps: taking a gravity standard triangulation network as a skeleton, converting a time shifting gravity residual error into grid virtual deformation, and determining an edge-level priority channel and convergence / divergence; and coupling water / soil / gas and cross-phase parameters in the same side-node space. Gravity deformation, a three-phase flow field, interannual change, a microbial community memory index, underground water lag and observation consistency are sequentially aggregated by adopting a programmable expert, rainfall, wind and temperature are mapped into parameter increments through a forecast hook, and rolling updating is carried out. According to the method, mass conservation and threshold elimination are executed at an edge level, a main diffusion ridge line, the arrival time of a sensitive section p10 / p50 / p90 and a source region contribution rate are output, and interpretable prediction, verification and accurate traceability of non-point source pollution are realized.

The invention discloses a multi-subject evolutionary game method and system for generating an annual scheduling plan of a water transfer project, and the method comprises the steps: collecting the data of a research region, dividing the research region into a water source region and a water receiving region, and making a water plan strategy set of the water receiving region; constructing a three-dimensional joint distribution function of the current-moment water diversion amount of the water source area, the current-moment water inflow amount of the water receiving area and the previous-moment water inflow amount of the water receiving area, and generating random samples of the water diversion amount and the water inflow process of the water receiving area; constructing a water transfer project annual water quantity scheduling plan making model, and calculating the water supply quantity of each water receiving area; calculating an expected profit value of the water receiving area; and carrying out water use plan strategy adjustment and iteration on the water receiving area until the probability of selecting a specific water use plan strategy by the water receiving area approaches 1, and obtaining a stable decision combination of the annual water use plan of the water receiving area corresponding to the random sample. According to the method, a stable strategy for making an annual water use plan in a water receiving area under different water incoming conditions and uncertain risks is obtained.

The invention discloses a method and a system for calculating a fire envelope temperature field of a large-span space structure. The method comprises the following steps: reading fire scene parameters, a geometric position of a fire source area and a steel member node file; establishing a fire source plane polygon according to the geometric position of the fire source area, and calculating the horizontal projection distance and the vertical distance between each component node and the fire source and the distance between the center of the ignition source and the steel component; according to the fire scene parameters and the distance, an empirical formula library is called in parallel, and the smoke temperature time history of each steel member node is obtained; according to the smoke temperature time history, the flame geometric parameters and the component thermal parameters, the component temperature time history is iteratively calculated step by step; in all fire scenes, the highest temperature and the scene corresponding to the highest temperature are taken for each component node, and an envelope temperature field is generated; and outputting the temperature time history, the envelope temperature field and the scene extreme value to a storage medium. According to the method, the calculation precision, the calculation efficiency and the engineering operability are considered, and the overall fire-resistant safety evaluation requirement of the large-span space structure is met.

The invention discloses a small watershed debris flow starting accumulated rainfall threshold calculation method, and relates to the technical field of debris flow monitoring and early warning, and the method comprises the following steps: 1, obtaining the slope # imgabs0 # and rainfall intensity I of a debris flow source area accumulation body, and the dry density # imgabs1 # of the source accumulation body through on-site survey and measurement; and 2, calculating a small-watershed debris flow starting accumulated rainfall threshold value by combining the slope # imgabs2 # of the debris flow material source area accumulation body, the rainfall intensity I, the dry density # imgabs3 # of the material source accumulation body and the relationship among the slope # imgabs2 #, the rainfall intensity I and the dry density # imgabs3 # of the debris flow material source area accumulation body. According to the small watershed debris flow starting cumulative rainfall threshold value calculation method, the influence of the slope accumulation angle, the soil dry density, the rainfall intensity and the like on the small watershed debris flow starting cumulative rainfall threshold value is fully considered, a more scientific measurement and calculation principle is achieved, the calculation form is simple, and parameters are easy to obtain.

The application discloses a kind of agricultural non-point source pollution prediction and tracing method, it is related to agricultural monitoring technical field, to gravity standard triangulation network as skeleton, time-lapse gravity residual is converted to grid virtual deformation, and determines edge level priority channel and convergence / divergence;In the same edge-node space coupling water / soil / air and cross-phase parameter.Adopt programmable expert sequence aggregation: gravity deformation, three-phase flow field, interannual variation, microbial community memory index, groundwater lag and observation consistency, and by forecast hook, rainfall, wind, temperature is mapped as parameter increment, and rolling update.Method is carried out mass conservation and threshold rejection at edge level, output main diffusion ridge line, sensitive section p10 / p50 / p90 arrival time and source area contribution rate, realize the explainable prediction, verification and accurate tracing of non-point source pollution.

This invention discloses a method for screening ecological source areas in densely populated urban areas that couples multiple factors with planning overlays. Belonging to the field of urban ecological planning, the method includes the following steps: screening of dual indicator species and construction of differentiated resistance surfaces; habitat suitability assessment and preliminary extraction of potential source areas; minimum cost path simulation under cost constraints; functional connectivity importance evaluation based on graph theory; three-factor coupled screening and source area classification; and verification and application feedback of overlay with statutory planning. This invention, a method for screening ecological source areas in densely populated urban areas that couples multiple factors with planning overlays, comprehensively evaluates the ecological value of patches from three dimensions: internal patch attributes, external migration resistance, and their connecting role in the network. This significantly improves the scientific rigor and comprehensiveness of source area screening, directly identifying ecological source areas covered, omitted, or requiring improvement under planning, providing clear and operable technical support for planning revision, implementation, and daily ecological management.

The application discloses a laboratory intelligent layout optimization method and system for a multi-energy experiment building, and relates to the technical field of auxiliary layout optimization. The method comprises the following steps: S1, collecting space energy flow data and performing data preprocessing; S2, identifying the pollution source influence intensity in the experiment area, judging the leakage trend and retention tendency, and extracting the energy flow coupling relationship between regions; S3, evaluating the minimum exhaust boundary required by the experiment area, and performing dynamic correction on adjacent regions; S4, mapping the exhaust volume to the fan operating frequency and the end valve opening degree, and optimizing the equipment selection, pipe diameter ratio and end arrangement; S5, constructing a candidate layout generation and integrated evaluation mechanism, screening and obtaining an optimization scheme, and writing back to the BIM model. The problems of gas retention, energy waste and inability to dynamically respond to the operating state under the cross ventilation path due to the difficulty of traditional ventilation design to adapt to the differentiated working conditions of multi-energy regions are solved.

This invention relates to a method for constructing an urban green space ecological network based on an ecological security pattern. The method involves acquiring spatial distribution data of existing green space patches in a target urban area, extracting candidate urban ecological source areas, and then screening to obtain important urban ecological source areas. It combines existing land use types with other resistance factors to construct a comprehensive resistance surface. Based on important ecological source areas and the comprehensive resistance surface, a minimum cumulative resistance model is used to simulate the minimum cumulative resistance path and suitable path spatial range of potential ecological corridors. Based on circuit theory, the minimum cumulative resistance path is classified, and effective corridors are determined according to the level, with their suitable path spatial ranges extracted. Supplementary ecological nodes are identified. The suitable path spatial ranges of important ecological source areas, effective corridors, and supplementary ecological nodes are superimposed to form an urban green space ecological network. This invention provides a basis for the formulation and implementation of relevant plans, effectively improving the ecological service efficiency of green spaces, maintaining urban ecological balance, and improving the urban living environment.

The present application belongs to the technical field of pollution tracing, and discloses a pollution tracing method and system for distributed water bodies. A plurality of directed node pairs are constructed according to the topological structure of each partition node in the monitored water area. The time lag interval of the pollutant concentration peak value between each directed node pair is determined according to the pollutant concentration data in the monitored water area. Effective node pairs that satisfy the space-time constraint are determined from the plurality of directed node pairs, and a plurality of backtracking paths are constructed according to the effective node pairs. A plurality of simulation paths are obtained by performing particle tracking simulation on the pollutant concentration data, and the particle intersection area of the pollutant is determined according to the plurality of simulation paths. The pollution source area is determined according to the spatial intersection of the plurality of backtracking paths and the particle intersection area, and the source location is further determined. The present application constructs backtracking paths through dynamic time lag analysis, combines particle tracking with grid intersection positioning, realizes high-precision identification of pollution sources, and solves the problems of insufficient space-time dynamics and large positioning deviation of traditional methods.

The invention discloses a rural ecological landscape planning method, device and medium based on multi-model fusion, and the method comprises the steps: collecting the land utilization, remote sensing image, digital elevation and cultural landscape distribution data of a rural region, and extracting ecological nodes and recreation nodes; processing land utilization, remote sensing images and digital elevation data through a morphological spatial pattern analysis model to obtain a morphological spatial pattern analysis result; performing landscape connectivity analysis on the ecological source land, and identifying the ecological source land; processing the cultural landscape distribution data through a statistical analysis method to obtain a recreation source place; respectively calculating accumulated cost distances between the ecological source lands and between the recreation source lands by utilizing a minimum accumulated resistance model, and constructing an ecological resistance surface and a recreation resistance surface; calculating an interaction matrix of each ecological source place and each recreation source place by utilizing a gravity model, and screening out ecological corridors and recreation corridors; and overlapping the ecological source land, the ecological galleries, the ecological nodes, the recreation source land, the recreation galleries and the recreation nodes to construct an ecological recreation network.

The invention discloses a double-line protective net and a design method thereof, and belongs to the field of protective nets for rockfall impact, the double-line protective net comprises an upper protective net and a lower protective net which are used for intercepting rockfall in the same source area, and the upper protective net and the lower protective net are sequentially arranged from top to bottom along a slope; the distance between the upper-layer protective net and the lower-layer protective net is greater than the design deformation of the upper-layer protective net when the upper-layer protective net is impacted, and the distance between the lower-layer protective net and a protected object is greater than the elongation of the lower-layer protective net. According to the double-line protective net and the design method thereof, by arranging the double-line protective net, the rockfall interception effect is improved.

This invention relates to a method for determining the width of urban ecological corridors relying on rivers and roads, comprising: acquiring and preprocessing geographic information data of a target area; constructing an ecological source area screening index system to identify ecological source areas; constructing a comprehensive resistance surface; determining potential corridor paths between any two ecological source areas; identifying current density maps of areas in potential corridor paths that play an important role in animal migration; overlaying river and road layer data with the current density map, extracting a buffer zone with a width of 100m and calculating the average current density to obtain a buffer zone layer with current information; presetting a minimum width, dividing the buffer zone into several levels according to the average current density, extracting the corridors corresponding to the buffer zones, and then assigning each corridor a minimum width corresponding to its level according to the preset value. This invention determines the width levels of urban corridors based on current density, which helps to determine the width range of urban ecological corridors relying on rivers and roads.

The present application relates to the field of urban green space evapotranspiration zoning, and particularly relates to a kind of urban green space surface evapotranspiration zoning method and system based on impedance parameter, realize the distinction of tree, shrub and lawn transpiration in urban green space.The present application first collects and pre-processes vegetation morphological parameter, meteorological data, crown surface temperature, soil heat flux, vegetation transpiration and eddy correlation flux data;Using back-penman-monteith formula and surface energy balance equation, the leaf boundary layer impedance and crown stomatal impedance of each vegetation type are calculated;Through the flux footprint model, the proportion of each vegetation type in the flux contribution source area is determined, and the total aerodynamic impedance and total stomatal impedance of the ground surface are back-calculated;According to the surface energy balance equation, the aerodynamic impedance of each vegetation is solved and fitted and corrected;Finally, the corrected impedance parameter is substituted into the Penman-Monteith model to calculate the transpiration of each vegetation.The method effectively overcomes the mismatching problem of single scale and community scale data, and improves the calculation accuracy of evapotranspiration zoning.

The invention discloses a laboratory intelligent layout optimization method and system for a multi-energy experimental building, and relates to the technical field of auxiliary layout optimization. Comprising the following steps: S1, collecting space energy flow data, and carrying out data preprocessing; s2, identifying pollution source influence intensity in the experimental area, judging a leakage trend and a retention trend, and extracting an energy flow coupling relationship between the areas; s3, evaluating the minimum exhaust boundary required by the experimental area, and performing dynamic correction on the adjacent area; s4, the exhaust air rate is mapped into the fan operation frequency and the tail end valve opening degree, and optimization judgment is conducted on equipment model selection, the pipe diameter proportion and tail end arrangement; and S5, constructing a candidate layout generation and integration evaluation mechanism, screening and obtaining an optimization scheme, and writing the optimization scheme back to the BIM model. The problems that due to the fact that traditional ventilation design is difficult to adapt to the differentiated working conditions of multiple energy areas, gas detention and energy waste are caused under ventilation path crossing, and dynamic response cannot be achieved along with the running state are solved.

The invention provides a method for calculating the maximum amplitude of surges caused by high-position debris flow. The method comprises the steps that the effective wave making volume of the debris flow is obtained and calculated according to the landslide shear-out position, the debris flow width, the slip mass volume, the distance from the front edge of the slip mass to the water surface, the source area substance sliding angle and the moving slope angle of a source area; the maximum wave amplitude of the surge is calculated according to the effective wave making volume of the debris flow, the elevation of the landslide front edge of the high-position debris flow is usually large, so that the distance from the front edge of a slip mass to the water surface is larger than that of the conventional debris flow, the slip mass is disintegrated and granulated in the sliding process, the volume of the non-slip mass with the maximum wave amplitude of the surge is determined, and the maximum wave amplitude of the surge is determined. Therefore, the maximum wave amplitude of the surge is calculated by introducing the effective wave making volume, so that the calculation result is more suitable for the actual situation.