271 results about "Urban region" patented technology

A method for extracting a 3D terrain model for identifying at least buildings and terrain from LIDAR data is disclosed, comprising the steps of generating a point cloud representing terrain and buildings mapped by LIDAR; classifying points in the point cloud, the point cloud having ground and non-ground points, the non-ground points representing buildings and clutter; segmenting the non-ground points into buildings and clutter; and calculating a fit between at least one building segment and at least one rectilinear structure, wherein the fit yields the rectilinear structure with the fewest number of vertices. The step of calculating further comprises the steps of (a) calculating a fit of a rectilinear structure to the at least one building segment, wherein each of the vertices has an angle that is a multiple of 90 degrees; (b) counting the number of vertices; (c) rotating the at least one building segment about an axis by a predetermined increment; and (d) repeating steps (a)-(c) until a rectilinear structure with the least number of vertices is found.

The invention discloses an urban traffic flow prediction method with regional vitality integrated. The method comprises steps: S1, regional division is carried out on an urban road network, and the traffic flow in each region is calculated; S2, a regional vitality model is designed: by using distribution of urban points of interest, holidays and weather information, a 3D convolution neural network(3D CNN) is used to study the dynamic changes of the vitality in each urban region; S3, a flow prediction model is designed: the regional vitality and the traffic flow are integrated, and a convolution long short-term memory network (ConvLSTM) is used for flow prediction; and S4, according to the historical data, the regional vitality model and the flow prediction model are trained at the same time, and the well-trained models are used for predicting the traffic flow in each region in real time. Through integrating the regional vitality and considering influences from a driving force behind crowd activities and external factors, high prediction precision can be acquired.

The invention relates to the field of urban traffic signal control, especially relates to a supersaturated traffic flow intersection queue overflow prevention and control method. Aimed at the problem of traffic flow queue overflow constantly occurring during peak hours in urban regions such as main urban districts in the city and central business districts where the distance among intersections is short and the traffic flow is high, the invention controls of the traffic flow at an entrance road section and an exit road section through traffic signals, thereby achieving the closure and diversion of traffic flow; and starts with the control of the capacity of the traffic flow of a road section, to prevent the intersection traffic flow queue overflow.

The invention discloses an expert-supported application system platform used for government affair and business affair decision and an establishment method thereof, and an E-IDSS theory and application thereof, which are used for realizing a new generation decision system by taking network consultation interaction and information safety as the basis, taking data acquisition and expert resource integration as the core and taking standardization and normalization as the link. The system consists of a center, two interfaces, three systems, six platforms, nine functional modules and a plurality of application systems; the establishment method for the system makes the system realize the interaction between experts and experts, experts and the government, experts and enterprises, and experts and the society; and network platforms which include the application platforms of full information carriers, namely communication carriers of an internet, a mobile internet, a cable TV network, an internet of things and the like serve social institutions, the government, the enterprises and the public, and become the new generation decision expert-supported platforms which integrate the national expert resources, enable knowledge storage and serve the government affairs and the business affairs of the provinces, the cities and the districts in China.

The invention discloses a signal collaborative optimization control method and system of multiple intersections of an urban region, and relates to the field of traffic management and control. According to the time when vehicles are away from an upstream intersection and control scheme information of the upstream intersection, time when the vehicles reach the tail end of a queue, changes of the number of the vehicles in queue and queuing waiting time of the vehicles are sequentially estimated, and are taken as a target function, an optimal signal control scheme within the predicated time length is calculated, and finally, the state of a lamp light is updated. Existing intersection facility resource allocation is fully utilized, and the problems that a traditional self-adaption signal control method is only suitable for a single intersection, and the computation complexity is large are solved. The method has the advantages of being wide in application range, easy to achieve, high in reliability and the like.

The invention discloses an urban resident traffic transfer mode discovery system and method based on urban traffic OD data. The system includes a data preprocessing module, a transfer trajectory identification module, a transfer hotspot area discovering module and a group transfer mode exploring module. The system and method provided by the invention are based on a large amount of one-card swiping data during real resident bus travel, and have robustness and general applicability; the discovery of the urban region traffic transfer mode provides data support and reasonable suggestions for the public transport line optimization and the dynamic vehicle scheduling.

The invention discloses a rapid estimation method for solar energy in a construction size. The method includes the steps that by the comprehensive utilization of LiDAR data and high-resolution remote sensing image data, and three-dimension digital surface modeling is performed on objects such as urban constructions and trees; through simulation analysis of the attenuation effect, on direct solar radiation to the ground, of the atmosphere and the sheltering influence, on direct solar radiation energy obtained by construction surfaces including roofs and wall faces, by the urban objects, the solar energy obtained by the roofs and the wall faces of the urban constructions and dynamic estimated values are obtained. The rapid estimation method is suitable for specific application of using solar energy resources in the construction size in an urban region, wherein the specific application includes optimal configuration of energy resources, installation of solar photovoltaic equipment, design of green and environment-friendly constructions and the like.

The invention relates to a method for generating a road network map based on bus GPS data. The method comprises the steps that 1, an urban region which needs to generate the road network map is selected, and GPS data of each bus are collected; 2, preprocessing is conducted on the stored GPS data of each bus, and separation is conducted on the GPS data of upstream buses and the GPS data of downstream buses on each route; 3, a road route is extracted; 4, superposition is conducted on the road route through a supplementary mode; 5, repeatability between road sections of the road route is judged, overlap road sections are combined, and an integrated road network map is generated. According to the method for generating the road network map based on the bus GPS data, the more accurate road network map with a clear direction is obtained, and the application of route guidance is facilitated; compared with a traditional map making method, the cost of obtaining data is low, the speed of obtaining is fast; the method for generating the road network map based on the bus GPS data has the advantages of being concise in steps and strong in practicability; the road network map can be rapidly generated through a software program, and a road network structure is updated in real time.

The embodiments described herein relate to a modeling system that defines index categories and uses model variables for analyzing successful or non-successful implementation. Data Driven Placemaking (DDP) provides evidence-based support to stakeholders (including designers, decision makers, policy makers, academics, and community members) for the purposes of improving designs for cities (and groupings of city regions and subsets of urban regions), via the collection, storage, transformation, analysis, and visualization of data relating to index categories and model variables.

The invention discloses a digital-map-based urban traffic flow network parallel information system. A location-based service (LBS) system is used as a framework, and a browser and Android application are used as a display platform. The system comprises a positioning service module, a road condition service module, a path planning service module and a traffic information prediction module, wherein the positioning service module provides a positioning parameter for the road condition service module and the path planning service module; the road condition service module receives positioning information provided by the positioning service module, and displays the road condition information of an urban region on a digital map; the path planning service module performs path selection service between a starting point and an ending point or between a current position and a destination according to a request of a user to select an optimal path between the starting point and the ending point or between the current position and the destination; and the traffic information prediction module is a core program for predicting traffic road condition information. The system has the advantages that the road conditions of a city can be comprehensively and accurately displayed by road condition service; and real-time road conditions and predicted road conditions are comprehensively taken into account by path planning service, and the optimal path can be accurately planned.

The invention provides a vehicle-mounted integrated navigation method and device. The method comprises the steps that S10, a vehicle-mounted terminal and a mobile terminal build communication connection; S20, the vehicle-mounted terminal obtains current position information, and judges whether a current road section enters a city center or not, and if yes, the next step is executed; S30, the vehicle-mounted terminal detects whether a current positioning error E is higher than a threshold value E0 or not, and a positioning request is sent to the mobile terminal; S40, the mobile terminal sends the positioning request to a server and obtains first position information to the vehicle-mounted information; S50, the vehicle-mounted terminal corrects the current position information according to the first position information, second position information is obtained; S60, the vehicle-mounted terminal obtains a live-action road section image in front of a vehicle; S70, the vehicle-mounted terminal obtains lane information of the road section in front of the vehicle and the actual lane where the vehicle is located; S80, according to the lane information and the second position information corrected by the actual lane where the vehicle is located, third position information is obtained; S90, according to the third position information, navigation is performed. Accurate navigation is achieved in various positioning ways.

The invention discloses an urban hierarchical regional division method based on a vector map data model. The method comprises the steps that a corresponding road network diagram structure and polygon boundary data are established for a region needing to be divided; a corresponding diagram structure and boundary polygon are established according to the road network diagram structure and the polygon boundary data, a path is searched to divide an original polygon into two parts, and paths are continuously searched in the newly generated polygons to conduct diagram division till all the polygons cannot be divided; a city is divided into primary regions according to primary road data, all the primary regions are traversed, secondary road data under the primary regions are extracted, and secondary regions under the regions are divided out by applying a regional division algorithm, so that a hierarchical structure of urban regions is formed. According to the urban hierarchical regional division method based on the vector map data model, a diagram structure is used for storing vector map data, operations are all based on the vector data, original data of a map can be completely reserved, and the data can be processed in an undistorted mode.

The invention provides a regional bottleneck control method based on a macroscopic base map. The method comprises the steps: determining a control region and boundary control points according to urban land utilization; constructing the macroscopic base map through road segment section data; determining the regional congestion condition based on the macroscopic base map, and triggering a regional bottleneck control if a state index exceeds a preset threshold value; carrying out the feedback control according to a region state and an optimal state in the macroscopic base map, adjusting the incoming traffic flow of the region, and further determining the green ratio of a control phase. The method aims at alleviating the traffic congestion of an urban region, and improves the traffic efficiency of a key region or a sensitive region of a city through reducing the regional demands.

The invention relates to a component used in a railway, in particular to a high-speed railway noise barrier which comprises an H-shaped steel metal upright column, a precast concrete sound absorbing plate which is inserted into the H-shaped steel metal upright column, a transparent sound insulation plate installed above the precast concrete sound absorbing plate and an arc sound absorbing top part arranged at the top part of the transparent sound insulation plate. The high-speed railway noise barrier with the arc sound absorbing top part structure can efficiently absorb the noises of a high-speed railway train wheel rail, aerodynamic force of a train body and the like and prevent the noises from spreading to both sides of a line; and an insertion plate of a precast prestressed concrete unit at the lower part has no tensile stress under the load, thereby efficiently preventing the insertion plate from cracking and achieving the advantages of good anti-fatigue performance and durability, and the sound absorbing insertion plate of the prestressed concrete noise barrier has a low manufacturing cost and is convenient for installation and replacement. The high-speed railway noise barrier is suitable for places which have high requirements for noise isolation, such as urban regions, schools, hospitals, residential areas and the like.

The invention discloses an adaptive point-cloud filtering method for a complex terrain structure, and solves problems in the prior art that a filtering algorithm is sensitive to parameter change and misclassification is severe because of the fluctuant change of the terrain and the complex surface structure of an urban region. The method comprises the following steps: (1) building a point-cloud pyramid; (2) initializing a ground point G through employing the roughest hierarchical pyramid data, adding data of the next stage to a to-be-classified point U, and updating to-be-classified points; (3) carrying out the iteration of all hierarchies of the point-cloud pyramid, processing all the to-be-classified points, and storing a newly added ground point; (32) employing the method to obtain a filtering threshold value and carrying out filtering according to a DEM, bent energy and the scale information of the pyramid, and distinguishing the ground point and a non-ground point; (33) repeatedly carrying out steps (31)-(32) till there is no newly added ground point; (4) storing the ground point and the non-ground point after classification.

The invention discloses a street canyon motor vehicle exhaust pollutant concentration estimating system. The system can obtain street canyon pollutant diffusion and distribution situations by adopting a CFD numerical simulation method according to urban road vehicle flow, canyon geometric structure and other data and is strong in operability. In addition, the system makes monitoring of air pollution degrees in all urban regions operable and flexible, facilitates drawing of an air pollution concentration distribution diagram of the local region, facilitates determination of a heavy pollution zone of the local region and analysis of air pollution causes in the local region and provides a scientific and reasonable basis for formulation of local region exhaust pollution treatment measures.

The invention relates to a power supply system, in particular to a chain extension power supply system, which is applied to bar-shaped and zonal urban regions. In a set region, three power points distributed in a bar shape are provided, four feeder lines are formed between every two adjacent power points, each feeder line adopts a multi-segment connection mode, and power is supplied to the regionby feeder line units of a double-loop network. The chain extension power supply system initiatively put forwards a chain extension intermediate-voltage distribution network power supply mode suitablefor the standardization and differentiation of bar-shaped and zonal regional forms, has high symmetry and uniformity, optimizes the power distribution points of a high voltage distribution networks and reorganizes the network structure of an intermediate voltage distribution network, thereby improving the power supply reliability of the distribution network, shortening the power failure time of aser, enhancing the power supply transferring capability of the distribution network, gradually eliminating power supply 'bottlenecks' and weak links, enhancing the resistance of the distribution network to natural disasters and providing strong support for the construction of the distribution network. In a development process, the power supply system has relatively higher extensibility, and the reliability of the system is fully ensured.

The invention discloses a bus passenger travel station prediction method, a storage medium and a server. The bus passenger travel station prediction method comprises the steps that bus GPS track data,passenger bus IC card swiping record data and bus station and route vector data of a certain urban area are acquired; based on the bus GPS track data, the passenger bus IC card swiping record data and the bus station and route vector data, historical bus card swiping get-on stations of passengers are matched, and passenger historical get-on station travel links are constructed; spatial clusteringis carried out on the bus stations, and a passenger historical get-on clustering travel link is constructed; bus get-on clustering is predicated based on a variable-order Markov model and the passenger historical get-on clustering travel link, and a specific get-on station is predicated based on a probability model and based on the analysis of the bus and subway mixed travel chain, bus get-off clusters and get-off stations are predicated. According to the method, the bus get-on and get-off stations are well predicted, and the prediction accuracy of the travel stations is obviously improved.

The present invention discloses a method and system of land cover verification considering POI (Point of Interest) data spatial heterogeneity. The method comprises: obtaining a POI data set from a Sina Weibo open platform, performing overlapping o the urban area building data provided by an OSM (Open Street Map) and the POI data set, dividing POIs of an urban region and a non-urban region, and correcting a division result; classifying the determined urban region POI, and obtaining the POI classification result of the urban region; classifying different types of POIs of the non-urban region, and obtaining the POI classification result of the non-urban region; generating grid data according to the POI classification result, employing a majority voting algorithm to determine the land cover model of each grid, and generating a land cover classification result based on the POI; and employing a confusion matrix to obtain the verification precision of GlobeLand30 land cover data products based on the POI, and realizing the land cover precision verification considering POI spatial heterogeneity.

The invention discloses a face pollution control method for a combined system drainage pipe network system. An urban region is divided into a plurality of unit regions including sewage pipelines and rainwater pipelines through function purpose attributes. The rainwater pipeline and the sewage pipeline inside each unit region are communicated. A first rainwater treatment system arranged on the sewage pipeline inside each unit region separates sewage inside the sewage pipe and mixed sewage formed by preliminary rainwater into a sewage branch pipe or a rainwater branch pipe to treat the mixed sewage inside the unit region, the mixed sewage is guided into the sewage branch pipe or the rainwater branch pipe; a second rainwater treatment system arranged on the rainwater branch pipe achieves treatment of mixed sewage inside the rainwater branch pipe, and the mixed sewage is guided into the sewage branch pipe or natural water is directly drained. The face pollution control method is simple in structure and convenient to build, and efficient treatment of sewage and preliminary rainwater inside the regions divided through administrative functions inside a city can be achieved just by building a preliminary rainwater storage pond inside the limited region of the municipal road.

The invention discloses a method for detecting the urban region change based on multi-temporal SAR (synthetic aperture radar) images. The method comprises the following steps: firstly, collecting two multi-temporal SAR images of the same region at different periods, and correcting the SAR images by geometric correction and radiometric correction; and secondarily, processing the two corrected multi-temporal SAR images of the same region at different periods to obtain the change detection result. The detection method is simple, practical, and easy to realize, and is proposed special for the application of urban remote sensing images. The method has the unique advantage on image representation when being used for detecting the time-space change of urban regions with complex structural characteristics.

The invention discloses a wall reinforcing structure and method for improving the integrality of historic buildings. According to the wall reinforcing structure and method, the characteristics that most historic buildings are of brick concrete structures, no ring beam is used, and dead loads are large are considered, walls are reinforced through the reinforcing scheme based on offsite component prefabricating and site assembling, and the historic buildings are prevented from being continuously collapsed by vibration. By means of the wall reinforcing structure and method, the structure integrality can be improved, when vibration loads are externally and suddenly exerted, deformation of the walls is effectively controlled, and continuous collapse caused by overall instability of the historic buildings is prevented. Meanwhile, the wall reinforcing structure and method have the advantages of being high in reversible degree, free of working with naked fire in a site, easy to operate, convenient to apply, free of damage to historic building bodies and the like, the effective protection effect can be achieved when the historic buildings and particularly key cultural relics distributed in urban areas with dense buildings are influenced by construction technologies, with vibration characteristics, of municipal administration dismantling projects, metro building blasting projects, metro building deep foundation pit excavation projects, metro building large-diameter pile foundation construction and the like, and the wall reinforcing structure and method have the wide application prospects in the aspect of preventing extreme damage conditions, such as continuous collapse, of the historic buildings.