152 results about "Topology construction" patented technology

Provided is a single mobile robot optimal itineration control method based on a target tracking control strategy. The method comprises seven steps of map construction, task description, topology construction, optimal path searching, task decomposition, target tracking control, and pose information feedback. The method comprises: firstly, based on a linear temporal logic theory, combining a constructed weighting switching system and a linear temporal logic task formula, establishing task feasible network topology; then, using an optimal path searching method based on a Dijkstra algorithm to search an optimal path, and storing discrete coordinate points in environment corresponding to the optimal path in cache, and sending the discrete coordinate points to a target tracking controller in order; then, using a target tracking control method to give a controlled quantity to control a robot to move to a target point according to distance between the robot and the target point and deviation of angles; and finally, in an operation process of the robot, using a global camera to acquire present position coordinate and orientation information of the robot in real time, and feeding back to the target tracking controller, so as to realize closed-loop control.

A method and system for extracting and building end-to-end route information in a two-level, multi-area Internet protocol (IP) autonomous system (AS) operated according to a simple link state routing protocol such as the Integrated System to Integrated System (IS-IS) protocol is disclosed. The method and system enables a user, such as a network administrator, to explicitly identify a full set of paths (links and routers) that a given IP packet would potentially traverse from its entry point in the area of the AS where it originates until its exit point in its intended destination or exit area.

The invention discloses a method and system for processing point cloud data. The method includes: calculating distance of a current point in point cloud after topology construction and neighborhood points, mean values mu of the distance and a standard deviation sigma for expressing data dispersion degree; judging whether the distance between one neighborhood point and the current point p is in an interval of mu+-alpha-sigma, if on yes judgment, neglecting, otherwise deleting the point; building a bounding box data structure used for expressing point cloud grid space for the point cloud, and calculating distance between a central point p0 of a current bounding box and other points in the current bounding box, a mean value mu0 of the distance and a standard deviation sigma0; judging whether the distance between one point in the current bounding box and the central point p0 is in an interval of mu0+-alpha0-sigma0, if on yes judgment, deleting the point, otherwise neglecting. The point cloud processing method improves accuracy of noise point filtration and precision of point cloud data and effectively reduces redundancy of the point cloud data.

The invention is applicable to the technical field of networks and provides a network simulation topology construction method and device applied to a network shooting range and a computer readable storage medium, and the method comprises the steps: detecting a user operation triggered in a graphical editing interface, generating a topology file according to the user operation, and enabling the topology file to be used for representing the network topology of the network shooting range; analyzing the topological file, and generating a configuration file according to an analysis result, the configuration file comprising a virtual machine configuration file and a network configuration file; starting a core service based on the configuration file, wherein the core service is used for calling acorresponding API to construct a network simulation topology; And based on the core service, deploying network simulation resources corresponding to the configuration file according to the type of the network simulation environment. According to the invention, the real network topology of key infrastructure and industrial control can be reproduced visually, quickly, vividly and completely.

The invention discloses a low-voltage power line communication network constructing method for a power meter reading system. A constructed low-voltage power line communication network comprises a concentrator, a carrier power meter and a collector; wherein the collector and the carrier power meter are used as terminals for each level; the low-voltage power line communication network construction is completed in three steps: logical layering, communication topology construction and communication routing selection; the logical layering comprises establishing logical layers according to the length of the electrical distance between the terminals in each level, and respectively marking and attributing the collector and the carrier power meter into different levels; and the communication topology construction comprises storing the IP of the two terminals and the electrical distance into the concentrator under the condition that the electrical distance of the two terminals between the upper level and the lower level is less than or equal to L, thereby optimizing the network topology. In addition, the invention adopts a communication routing reconstruction method for the carrier power meter with failure, thereby realizing the timely updating and troubleshooting of the network topology.

The invention discloses a distributed topology control method for a cognitive Ad Hoc network, and mainly solves the problems of mutual interference of secondary users and failure in guarantee of connectivity of networks of the secondary users in the prior art. An implementation process of the distributed topology control method for the cognitive Ad Hoc network includes: enabling each node in the network to sequentially broadcast a HELLO packet twice, and receiving the HELLO packet of initial neighbor nodes to set up a local two-hop topology subgraph; constructing a shortest path tree according to energy consumption link cost weight on the basis of the local two-hop topology subgraph, and on the basis of the shortest path tree, constructing a local generation subgraph capable of guaranteeing user communication; adjusting transmission power according to one-hop neighbor nodes in the local generation subgraph; enabling all nodes in the network and links between the nodes and the logical neighbor nodes thereof to form a whole network topology; after topology construction is finished, performing independent channel selection for the nodes in the network. The distributed topology control method for the cognitive Ad Hoc network has the advantages of low complexity and realization of guaranteeing communication of user networks and eliminating user interference, and is applicable to the cognitive Ad Hoc network.

The invention relates to a multiple-target monitoring oriented method for sensing topology construction in a wireless sensor network. The method is characterized in that: on the basis of a multiple-target point sensing coverage scheduling algorithm based on a bionic algorithm, a multiple target point monitoring sensing topology construction method is provided from the perspective of multiple target point coverage scheduling; the bionic algorithm takes a target point coverage rate as a design condition and sets network equalization as a design object as well as puts emphasis on solution of problems of data redundant collection and target point multiple coverage. An optimization algorithm of the bionic algorithm is utilized as well as a network energy variance, a target point coverage rate and the number of movable nodes are used as construction parameters of a fitness function, so that a reasonable movable node set is calculated; and according to the set, a topological structure and a route of the network are controlled. According to the invention, the method is suitable for a low-power mixing sensor network with medium and high speeds in random redundancy laying and corresponded M2M application.

The invention relates to a flexible switching station interconnection structure with multiple electric energy comprehensive distribution. The interconnected structure of the flexible switching stationcomprises a plurality of flexible switching stations as nodes, wherein the input end of each flexible switching station is connected with a high-voltage alternating current bus bar, and the output end of the flexible switching station is respectively connected with a low-voltage alternating current bus bar and a low-voltage direct current bus bar. The ends of low voltage AC busbars are connectedby flexible multi-state switches, and the ends of low voltage DC busbars are connected by DC-DC converter; the low-voltage alternating current bus bar and the low-voltage direct current bus bar are connected with a load, an energy storage element and a distributed power supply. The flexible switching station with AC/DC voltage conversion and power distribution functions enables a flexible multi-state switch and a DC-DC converter to be interconnected. Compared with the traditional substation, the flexible switching station interconnected system has the advantages of active power flow control, flexible topology construction, distributed energy consumption, multi-voltage level interconnection, AC/DC unified distribution and so on, which improves the reliability and diversity of power supply.

The invention discloses a method for constructing a Torus network, a Torus network and a routing algorithm. The method for constructing the Torus network comprises the steps that a topology analysis module analyzes the Torus network, the position relation of each switch and each node in the Torus network is determined; a topology connection module is used for creating all the switches and all nodes according to the position relation so as to construct a Fabric network; a topology inspection module is used for checking whether the constructed Fabric network is consistent with the configurationfile; under the condition that the constructed fabric network is consistent with the configuration file, a topology construction module is used for converting the Fabric network into the Torus network. According to the technical scheme, the diameter of the network can be effectively compressed, the communication delay is reduced, the network performance is improved, and the requirement of a very large scale interconnection network can be effectively met.

The invention discloses a transformer area identification method and a method for constructing transformer area line topology. According to the invention, a load jump identification technology is adopted; load values of all nodes in a transformer area power supply network are collected, and load jump curves of each node can be formed; the load jump curves of all the sub-meters and the load jump curve of the general meter are subjected to load jump characteristic matching, so that the judgment of the corresponding electric meter mounting relationship is realized, the transformer area identification and transformer area line topology construction are realized, the influence of line loss power can be eliminated, and the identification accuracy is improved.

The invention provides a network security target range system and an operation method thereof, and constructs an integrated network security target range system capable of accessing multiple physicaldevices such as a protection verification system, a simulation attack system, an evaluation analysis system, a vehicle-mounted and ground target service system and the like based on a programmable optical channel system. The real running state of the network system is simulated, and the diversity, expansibility and reliability of use scenes of the network security target range system are improved;manual wiring operation is not needed, rapid topology construction, switching and management of various real physical devices or systems in the network security target range system are achieved, andthe flexibility and operation and maintenance efficiency of network security attack and defense drilling are improved.

The invention discloses a large-scale data processing device and method based on a procedure processing frame. The device comprises a topology construction module, a data reading module, a data processing module, an aggregation module and a storage module; the topology construction module is used for constructing data processing topology according to an XML configuration file; the data reading module is used for reading original data from a data source with a label, and loading a logic configuration file according to the label to obtain data of additional logic configuration; the data processing module is used for receiving the data with the additional logic configuration, and dynamically calling a processing method to generate a processing result and conducting shunting; the aggregation module is used for receiving a processing result of shutting and conducting merging; the storage module is used for receiving a merged result, and storing the merging result in a specified storage medium. In the large-scale data processing device and method based on the procedure processing frame, the data processing speed is high, and newly added data can be timely processed; a newly added processing rule can be dynamically called by being configured in Redis, and the insertion mode of the data is diversified; in different scenes, the device and method can be simply utilized with simple configuration modification, and have a certain application prospect.

The invention relates to a clustering tree topology construction method for heterogeneous wireless sensor networks (HWSNs) based on energy prediction. The clustering tree topology construction method comprises the steps: 1) analyzing and estimating the network average residual energy value of the next round according to the average residual energy and the energy difference value of the whole network in ideal conditions; 2) selecting a cluster head based on communication cost, guiding the cluster forming process by combination of node energy, link reliability and node spacing; and 3) selecting a suitable node as a relay node among the nodes in the cluster after forming of the cluster, and then transmitting the data to the cluster head. The clustering tree topology construction method for heterogeneous wireless sensor networks (HWSNs) based on energy prediction can obtain an optimal clustering tree topology network based on the precondition of less energy consumption when the heterogeneous wireless sensor networks are in the initial state so that energy consumption is saved and simultaneously the life cycle of networks is prolonged as long as possible.

The invention discloses to a wireless sensor network topology construction method based on a spanning tree, which comprises the following steps of 1) conducting neighbor detection, calculating the maximum probability that each neighbor node becomes a subnode of the neighbor node (a parent node) according to a message returned from the neighbor node, and conducting descending sort on temporary subnodes and generating a relation table, 2) conducting subnode selection, calculating and determining the number of the subnodes, and sending the relation table and an acknowledgement message to each temporary subnode that is identified as the subnode, and 3) conducting self-salvation, wherein the temporary subnode without receiving the relation table and the acknowledgement message waits for the self-salvation in Step 2), and the self-salvation is successful in Step 3) if the temporary subnode that is not temporarily identified as the subnode by the parent node broadcasts a Hello message to a node within the coverage area of the node and receives a reply message of the neighbor node within a waiting time range. The method is higher in energy utilization ratio and long in network life.

The invention discloses a network coding based weak security multicast transmission topology construction method facing integer transmission rates. The method includes the following steps: parametersof the network can be obtained; the network is expressed as a digraph, the digraph consists of nodes and edges, the nodes include source nodes, intermediate nodes and destination nodes, if a communication link exists between two nodes, an edge is connected between the two nodes in the communication link direction, the capacity of each directed edge is equal to the capacity of the corresponding communication link, and the cost of each directed edge is equal to the cost of the corresponding communication link; a mathematical model of the network coding based weak security multicast transmissiontopology of the integer transmission rates can be built according to the digraph; solving can be performed by adopting an integer linear programming solution; and a network coding based weak securitymulticast transmission topology construction plan of the integer transmission rates can be obtained. The construction of transmission topology can be achieved under the condition that the network coding based weak security multicast of the integer transmission rates meets weak security needs, secure transmission throughput in network can be reached to maximum, and at the same time, minimum transmission cost at the maximum throughput can be guaranteed, and efficiency and cost optimization of the network can be achieved.

The invention discloses an automatic construction and visualization method for a power distribution network topology. A complete topological network is constructed by utilizing the local topological information of a power distribution intelligent terminal, and the power distribution monitoring based on a network topological structure is provided through a graphical component. The invention relatesto an intelligent terminal module, a data acquisition module, a wireless transmission module, a topology construction module and a graphical module. The upstream terminal device number and the downstream terminal device number of the intelligent terminal only need to be input into the intelligent terminal in a unified mode, and after the intelligent terminal is powered on, the intelligent terminal automatically and remotely imports the local topology information into a platform server. The platform server converts the local topology information provided by each intelligent terminal into the complete power distribution network topology information in the form of a digraph; and finally, the complete power distribution network topology information is converted into a visual topology networkdiagram through the graphical component, so that a power distribution management user can monitor the operation state of the power distribution system through the visual topology network diagram.

The invention relates to a safety topology construction method of a high-speed mobile node. The safety topology construction method comprises the following steps of: firstly constructing a local Delaunay triangulation, detecting and marking all GG edges in the local Del graph, and adding the all GG edges to a logic neighbor set; and detecting all neighbor triangles, judging whether triangles meeting a proposal condition exist, and transmitting a proposal message to all the triangles to finish the construction of a safety topology graph if the triangles meeting the proposal condition exist. According to the safety topology construction method of the high-speed mobile node, disclosed by the invention, network performances are modified by introducing a topology control manner; in addition, through power control and link forwarding control, the load of the node is reduced, the confliction is reduced, a system architecture can meet requirements of a larger scale and more mobile node numbers, the quality of service is improved, and the safety topology construction method is suitable for serious changeable wartime environments. The topology graph has planarity and connectedness and is a support sub-graph of a UDG (Unit Disk Graph), and the connectedness of the topology structure is kept at the same time that the sparsity is met, thus the network is more reliable.

The invention discloses a transient stability evaluation method of an electric power system based on a graph attention network, and the method comprises the steps: obtaining operation data which comprises an operation data matrix X constructed by power grid real-time operation data measured by a PMU and an adjacent matrix A constructed according to a power grid operation topology; and inputting the operation data into a power system transient stability evaluation model for evaluation to obtain a stability result. The power grid topology is embedded into the evaluation model in an adjacent matrix mode, so that the difference of transient characteristics under different topologies is effectively considered, and meanwhile, the mobility of the model is improved; through a pooling layer in front of the classifier, the model is still applicable under the condition that the system scale is changed, the problem that the model needs to be redesigned and trained under the condition that the system scale is increased or decreased is avoided while the evaluation performance is ensured, and the model is not possessed by a previous deep learning transient stability evaluation model.

The invention discloses a unified distribution network frame topology construction method based on a graph fusion technology. The unified distribution network frame topology construction method comprises the following steps: step 1, data processing: collecting metadata of ledger data in three business systems including a marketing system, a production management system and a geographic informationsystem; preprocessing and reserving effective data; step 2, constructing a power distribution network frame meta-model; step 3, constructing a single-system grid structure topology: storing the constructed power distribution network grid structure topological graph in a graph database; and step 4, constructing a fused power distribution network frame topology: constructing a unified power distribution network frame topology by utilizing a graph fusion algorithm and combining the constructed single-system network frame topology. According to the invention, transverse consistency comparison check and longitudinal data accuracy check of machine account data of different systems can be realized, and self-service data check and governance services are provided for the system; and according toa governance result fed back by a business department, iteratively improving data governance and identifying model accuracy and efficiency.

The invention discloses a switch topology construction method and a switch topology construction device. The method comprises the following steps: acquiring corresponding connection data information from switch simple network management protocol service, wherein the connection data information is correlated with a connecting relationship between switches; analyzing the acquired data information, and constructing a connecting relationship expression for connection of each switch with the other switches through own physical ports on the basis of MAC (medium access control) addresses; performing processing and analysis on the established connecting relationship expression to obtain a corresponding switch topology structure. According to the scheme, the link layer topology construction accuracy can be improved.

The invention relates to a topology construction and internet access method for an aviation ad-hoc network. In the method, a flight process is divided into five stages including a dormancy stage, a waiting stage, a take-off stage, a cruising stage and a landing stage; a corresponding topology construction and data transmission strategy is provided for a flight node in a specific flight stage, wherein a waiting node is used as a connection point between an ad-hoc network in the air and a ground network, passively accepts network access requests of other nodes, and is mainly responsible for data relay; on one hand, a take-off node rapidly establishes a link information table; on the other hand, the take-off node accepts a request of the waiting node, carries data of the ground network, and rapidly diffuses data of the ground network in the ad-hoc network in the air; a cruising node regularly updates the link information table, and selects the optimal and backup link to perform data exchange in the air according to a link distance and the link duration; and a landing node rapidly forwards the data of the network in the air to the waiting node, and finally forwards the data into the ground network. By means of the topology construction and internet access method for the aviation ad-hoc network disclosed by the invention, fully connected topology can be rapidly formed; and communication between the aviation ad-hoc network and the ground network is realized.