251 results about "Space Network" patented technology

The invention discloses an air-ground integrated network architecture based on a software defined network and network function virtualization. According to the system architecture, the entire network consists of a ground network part and a space network part, and is divided in a unified manner into a management layer, a control layer and a forwarding layer. The management layer is responsible for registering and querying the network status and network service functions of the ground part and the space part in the air-ground integrated network and making routing, security, billing, service call and resource management strategies. The control layer consists of a ground part and a space part, and is responsible for controlling data forwarding according to the strategies of the management layer and collecting the information of network links and network service functions. The forwarding layer consists of a ground part and a space part, and is responsible for forwarding data and providing network service functions. The architecture uses a software defined network and an idea of network function virtualization, and efficient information transmission control and on-demand satellite service providing are realized in an air-ground integrated network.

The invention discloses a software defined network (SDN)-based space network QoS guarantee method and a management center. An SDN-based space network is divided into a management layer, a control layer, and a forwarding layer, and includes a bottom-up information collecting process and a top-down strategy sending process. A satellite network management center in the management layer is an entity for making a QoS guarantee strategy, and the QoS guarantee strategy mainly includes the results in service grade authentication, traffic scheduling and bandwidth allocation, wherein service grade authentication is a process in which different service requests of users are distinguished according to the service grading standard, traffic scheduling is a process in which transmission paths meeting the QoS requirement are planned for data flows at different service grades, and bandwidth allocation is a process in which priority-based on-demand bandwidth resources are provided in a link sharing state. In addition, the invention provides a network status monitoring method in the control layer, which is the basis for the satellite network management center to make a QoS guarantee strategy. According to the invention, based on a controllable and manageable software defined network, space network resource allocation is optimized, on-demand service of the space network is realized, and the purpose of QoS guarantee is achieved.

The invention relates to a dual-interlayer symmetrical multi-pyramid configuration three-dimensional integrally-braid lattice composite material and a preparation method thereof. The composite material comprises an upper panel layer, a middle panel layer, a lower panel layer and lattice core layers arranged between the upper panel layer and the middle panel layer as well as between the middle panel layer and the lower panel layer. The composite material is characterized in that the upper panel layer, the middle panel layer and the lower panel layer form a dual-interlayer structure, the lattice core layers are of a space network truss structure consisting of symmetrical multi-pyramid configuration unit cells arranged periodically and communicated through holes, and the lattice core layers, the upper panel layer, the middle panel layer and the lower panel layer are weaved, alternated, wound and sutured into a whole according to the design rule and are subjected to once resin injection forming by adopting a resin transfer process. The preparation method in the invention comprises the steps of: 1, preparing the upper panel layer, the middle panel layer and the lower panel layer; 2, drilling a needle hole; 3, preparing the lattice core layers; and 4, curing and forming resins. The composite material prepared by the method has better integrity, more excellent mechanical property, lighter mass, higher bearing efficiency and better functionality in comparison with the traditional interlayer structure composite material.

There is provided a computer-implemented method for transmitting data over a wireless network using white spaces. A first white space transmission channel is determined for communicating with mobile client devices. Wireless communication takes place with the mobile client devices over the first white space transmission channel. If the first white space transmission channel becomes unavailable to one of the mobile client devices because of the presence of a primary user on the first white space transmission channel, a different white space transmission channel is determined for communicating with the mobile client device that is affected. The first white space transmission channel may become unavailable to the affected mobile client device, for example, because a primary user begins using the first white space transmission channel in proximity to the affected device. The primary user may be a wireless microphone. Thereafter, communication with the affected wireless device takes place on the different white space transmission channel, while unaffected devices continue to communicate on the first white space transmission channel. Also provided are an exemplary wireless base station and an exemplary mobile client device.

Embodiments of the present invention relate to wireless communication technical field, and particularly to a method, system and device for measuring channel state information, used for solving the existing problem in the prior art that on the premise of making full use of the performance advantage of Massive MIMO, the current CSI measurement and feedback mechanism based on downlink reference signal would result in significant time-frequency resource overhead. The method for measuring channel state information provided in the embodiments of the present invention comprises that: a network side device transmits a group of reference signals which have been beam-formed to a user equipment in order that the user equipment can measure the reference signals, wherein each reference signal of the group of reference signals corresponds to a space in a section; and the network side device judges whether to adjust the forming manner of the reference signal on the basis of the information fed back by the user equipment. By applying the solution of the embodiments of the present invention, on the premise of ensuring the Massive MIMO performance advantage, the overhead resulting from the downlink reference signal measurement and feedback can be reduced.

A managed surface-space network fabric is presented. The surface-space network fabric can include a spaced-based network fabric and a surface-based network fabric integrated together to form a single fabric managed by a global fabric manager. The global fabric manager cooperates with other fabric managers local to each fabric to establish a communication topology among all the nodes of the fabric. Preferred topologies include paths from any port on a node to any other port on another node in the fabric. The surface-space fabric, and each individual fabric, can function as a distributed core fabric operating as a single, coherent device.

The invention provides a video image classification method based on a time-space co-occurrence double-flow network. The main content of the video image classification method comprises data input, a time-space double-flow network, fusion and an SVM classifier. The process comprises the steps of firstly inputting image and light stream information, performing early fusion by being combined with a time network and a space network, enabling fusion output to act as a feature vector, inputting the feature vector into the SVM classifier, and acquiring a final classification result. According to the invention, a method that the early fusion double-flow network is combined with time information and space information (time-space co-occurrence) is adopted, a video data set of the monkey is utilized, and more frames, namely, more space data, are utilized from each piece of video so as to generate significant improvement in precision; the space information and the time information are combined and form mutual complementation, and the precision reaches 65.8%. A smaller number of separated clusters are formed through using the co-occurrence method, the separated clusters generally stay together more closely, and the time information is better utilized.

A thermally insulating tile floor covering system comprising a water resistant, inorganic, thermal air-gap plastic barrier tile layer which is provided with a network of integral spaced plastic studs, legs or wall sections on the underside thereof, to form an interconnected space network between the undersurface of the flat plastic tile and the surface of a concrete floor supporting the tile. The space network provides an insulating thermal air gap barrier space to receive and circulate any water vapor penetrating up through the concrete floor.

The invention discloses a chemical improved method to harness swelled ground, which comprises the following steps: allocating swelled ground PAS chemical modifying agent with silicate of soda + basic ion polyacrylamide + water; spraying modifying agent on swelled ground body; changing, linking, bundling, birdnesting, and jelling with ground body particle ion; forming space network structure; increasing physical mechanics property and engineering feature of swelled ground; meeting engineering construction demand of swelled ground. This invention possesses good water stable effect and even modification, which is fit for construction foundation treatment, highway engineering earth bank, slope harness and so on swelled ground project.

A managed surface-space network fabric is presented. The surface-space network fabric can include a spaced-based network fabric and a surface-based network fabric integrated together to form a single fabric managed by a global fabric manager. The global fabric manager cooperates with other fabric managers local to each fabric to establish a communication topology among all the nodes of the fabric. Preferred topologies include paths from any port on a node to any other port on another node in the fabric. The surface-space fabric, and each individual fabric, can function as a distributed core fabric operating as a single, coherent device.

The invention discloses a strong-wind high-speed railway along-the-line wind speed space network structure prediction method. The wind speed is predicted by building an optimal weighted combined model based on three prediction models, wherein the first prediction model uses the short-term historical wind speed data of multiple anemometer stations, the second prediction model uses the short-term historical wind speed data of a single anemometer station, and the third prediction model uses the historical wind speed data of multiple anemometer stations and the corresponding historical meteorological data. The method integrates multiple elements including space, time and weather, makes use of a plurality of data including current data of an auxiliary anemometer station and a target anemometer station, historical meteorological data of the auxiliary anemometer station and the target anemometer station and wind speed data, and ensures the diversity of data. Temporal correlation and spatial correlation are combined organically, which improves the prediction reliability. As the data of the three basic models is interleaved, the amount of calculation is reduced. The prediction stability is high, multi-step advance prediction is realized, and the method has engineering application value.

An Application-Aware Automatic Network Selection (ANS) router and method for automatic network selection, translation of data between networks, and application-specific feedback. In one embodiment, the router and method select between an Internet Protocol (IP) network and a Delay Tolerant Networking (DTN) network, monitoring the state of both networks, intercepting IP packets which could otherwise not be delivered, responding to the application that sent the packet, and translating a group of such packets into a DTN bundle; the software implementing this system resides on a network router that functions as a node on both the IP and DTN networks. In other embodiments, the system and method select between or among mobile ad hoc networks, sensor networks, vehicular networks, and satellite and deep space networks.

The invention discloses a multifunctional catamaran. The multifunctional catamaran comprises two unit ship bodies (6), a fixed-connection deck (7), sorting doors (2), a lantern ring automatic assembling device (3), a sleeve ring rope net (5), a fixed sliding pole (4), a traction rope, an automation knotting device (8), a mechanical automatic control cabin (9), oil absorbent felt supporting rolling shafts (10) and oil absorbent felts (11). The two unit ship bodies (6) are connected through the fixed-connection deck (7) and are symmetrically arranged, and the inner side of a bow (1) of each unit ship body (6) is provided with one rotatable sorting door (2); the length of the two closed sorting doors (2) is the distance between the two unit ship bodies (6); the lantern ring automatic assembling device (3) and the sleeve ring rope net (5) are arranged between the two unit ship bodies (6); the automation knotting device (8) and the mechanical automatic control cabin (9) are arranged on the fixed-connection deck (7); and the oil absorbent felt supporting rolling shafts (10) are arranged on the tails of the two unit ship bodies (6), and the oil absorbent felts (11) are wound on the oil absorbent felt supporting rolling shafts (10). Space network layout in the catamaran is utilized for achieving multiple functions of clear floating oil absorption, aquatic transportation, fishing farming, efficient rescue, water safety swimming and the like

The invention relates to a method for preparing through-hole foam copper, in particular to the manufacture of metal with an opened or a closed hole. Electrolytic copper powder and NaCl granules are taken as raw materials, and sintering-desolvation technology is adopted for preparing the through-hole foam copper; the NaCl granules, the electrolytic copper powder and additive are evenly mixed together and then pressed into green-ware; the obtained green-ware is sintered in a sintering furnace under the argon atmosphere, and the obtained product is placed into a circulating hot water device to dissolve and remove the NaCl granules and then washed by ultrasonic wave water bath, and cleaned by acetone; finally, the through-hole foam copper product which is provided with the hole formed by three-dimensional communicated space network, has the porosity of 50-81% and the average pore size of 0.2-4mm and is provided with microcosmic holes in a base body can be obtained. The obtained through-hole foam copper has controllable porosity and aperture, higher sintering quality and excellent energy absorbing performance.

The invention belongs to the technical field of traffic information processing and discloses a traffic sign recognition method and system based on a deep space network. The method includes: extractingimage information with space invariance by using a space transformation network; by improving the VGG network, fusing the features extracted from each stage of the network layer, using a spatial pyramid method to process the features of the fused image, and obtaining more features of the traffic sign images. A spatial transformation network is added to make up for the deficiency that the CNN cannot effectively extract the image information with spatial invariance. The VGG network is improved, fusion of the features extracted from each stage of network layer is carried out, the spatial pyramid method is utilized to process the fused image features, and more information of traffic signs image features are obtained. The experimental results show that the accuracy of traffic sign recognitionis improved on the basis of enhancing the network features.

The present invention relates to an interaction method between space network and ground network and a communication protocol gateway. The interaction method comprises the following steps: monitoring and receiving network transmission package by the communication protocol gateways which are connected with one another through a distribution mode based on internet through a local main channel; identifying the style of transmission network of network transmission package, allocating the network transmission packages to the space-ground subchannel, ground-space subchannel, space-space subchannel or ground-ground subchannel according to the style of transmission network; transmitting the network transmission packages after executing protocol conversion to the network transmission packages by the space-ground subchannel and ground-space subchannel; and transmitting the network transmission packages after processing the network transmission packages by the space-space subchannel and ground-ground subchannel. The communication protocol gateway comprises a main channel, the space-ground subchannel, the ground-space subchannel, the ground-ground subchannel and space-space subchannel. The invention adopts the communication protocol gateway for converting protocol. The convenient interaction between the space network and the ground network can be realized. Each network transmission package is processed with the channel form. The processing efficiency can be increased and the generation of data transmission bottleneck is prevented.

The invention relates to a personal safety-based human body behavior identification method for an infrared video. The method comprises the steps of firstly from night vision human body behavior videosused for training, obtaining static image data streams and dynamic optical flow data streams, and behavior classification tags corresponding to the videos; secondly inputting static gray images, dynamic optical flow images and corresponding tags to a space convolution neural network, and inputting the dynamic optical flow images and the corresponding tags to a time convolutional neural network for carrying out iterative learning, thereby obtaining model parameters of a space network and a time network; thirdly inputting the gray images used for testing and the optical flow images to a space network model for obtaining a result I, and inputting the optical flow images to a time network model for obtaining a result II; and finally performing weighted summation on the result I and the resultII to obtain a final video classification result. According to the method, human body behavior actions in the infrared video can be accurately identified.

The invention relates to an urban subway dynamic passenger flow distribution method constructed on the basis of a time-space network. Based on a subway passenger flow demand and an aging characteristic of passenger travel cost, urban subway dynamic passenger flow constructed by the passenger travel time-space network is distributed. Based on a subway space network, train running timetable information is combined, subway physical stations are expanded in time and space and a minimum cost route among each station in the time-space network is obtained according to a shortest route search algorithm. According to the dynamic passenger flow distribution method, a user balance principle can be met so that a passenger travel time and space route is closer to an actual one.

The invention discloses a formation satellite routing method based on SDN architecture, and belongs to the field of satellite communication. According to the invention, a spatial network routing technical scheme based on an SDN architecture and adopting an SR routing protocol is designed, the spatial network adopts the SDN architecture, the main management function of the network is placed in a transport management center on the ground, interaction with users or services is completed at the same time, network topology is saved, and the routing function is completed. The control function is realized in a ground gateway station, the control plane function is enhanced, and the idea of a distributed controller is combined. A satellite then performs the function of a switch. On a user ground orspace access side, writing-in work of source routing information is completed, and a subsequent node completes forwarding by reading the source routing information in a data packet header no matter on a satellite or on the ground, and does not need to maintain forwarding information of each data stream. In this way, most of routing management and control of the space network can be completed on the ground and is not limited by satellite computing resources, so limited satellite resources are used for broadband data transmission, and processing consumption is reduced.

The invention provides a space network communication method based on WIFI. Specifically, a network topology structure which mainly comprises one main node and a plurality of slave nodes is built, wherein data communication between the main node and the slave nodes can be carried out based on the WI-FI standard; the main node and the slave nodes abide by network communication protocols, wherein the network communication protocols comprise the slave node access protocol, the main node active data sending protocol and the slave node active data sending and receiving protocol; a network communication protocol structure on which the network communication protocols are based comprises a data transmission layer, an interface layer and an application layer, wherein the data transmission layer has a data transparent transmission function based on the WI-FI standard, the interface layer serves as a data transmission channel between the data transmission layer and the application layer, and the application layer is responsible for terminal processing of data transmission. The space network communication method has higher suitability, flexibility and reliability and can be applied to fields like the minisatellite constellation formation communication field and the aircraft on-orbit service communication field.

The invention discloses a method for three-dimensionally positioning a network node of a wireless sensor, which comprises the following steps: performing meshing on a space network region, calculating the distance between a mesh vertex and each anchor node and forming distance vectors; forming three groups of training sample sets according to the mesh vertex distance vectors and mesh vertex three-dimensional coordinates; obtaining a support vector regression machine for estimating an X coordinate, a Y coordinate and a Z coordinate of an unknown node respectively according to radial basis kernel function and a study training sample of a least squares support vector regression machine; and forming distance vectors by measuring distances between the unknown node and each anchor node, and respectively inputting the distance vectors into three regression machines to obtain a three-dimensional coordinate estimation value of the unknown node. Through the method, the influence on the node positioning accuracy by distance measuring noises of the unknown node and the anchor nodes can be greatly inhibited, and the three-dimensional positioning accuracy of the nodes is obviously improved.

The invention discloses a social network-oriented multi-information and multi-dimensional network information propagation model and method, and belongs to the field of social network analysis. The method comprises the following steps of: firstly, obtaining social network data and preprocessing the data; secondly, extracting user information, user behaviors and user relationships from real data, and constructing a multi-dimensional network space by using a cosine similarity method; thirdly, establishing a model, importing influence factors on the basis of traditional epidemic models through using an epidemic model mechanism for reference, so as to express interaction relationships and intensities between different pieces of information, and then constructing a multi-information and multi-dimensional space network-based information propagation model; and finally, carrying out simulation analysis, constructing a kinetic equation from a micro perspective and a macro perspective so as to analyze a common evolution trend of two messages. The model and method more accord with real scenes of information propagation and are more beneficial for research of information propagation processes.

The invention discloses a bionic design method of a skull tissue engineering scaffold, which comprises the following steps of: implementing three-dimensional reconstruction according to naturally aired skull micro CT (computed tomography) data to obtain a skull sample three-dimensional model; implementing statistics and analysis for the skull sample three-dimensional model to build a skull microporous structure parametric model; implementing skull scaffold bionic design through the skull microporous structure parametric model; and generating a bionic scaffold. Based on measurement of a natural skull micro CT image, the method raises three elements of a space network architecture, a cavity and a connection tube to implement the bionic design for the scaffold; an obtained internal microporous architecture is similar to a bone trabecula of a natural skull, and the average hole scale is about 500-700 microns, so that bone cell growth and climbing demands are satisfied; and moreover, the skull scaffold, obtained by intersection operation with a patch model of a coloboma part, can be matched with an adjacent part, so that the communication among holes is realized, and a bone structure of a true skull is suited better.

The invention discloses an intelligent garbage classification and recycling system. The intelligent garbage classification and recycling system comprises a cloud server, and an intelligent garbage classification and recycling terminal, a user terminal, a big data display terminal and an operation terminal which are in network communication connection with the cloud server; all terminal devices areconnected into a space network through the cloud server; and data information interaction and data statistics are carried out through network communication. Users are guided to classify and deliver through an intelligent garbage classification and recycling terminal; through a matched mobile phone APP, a reliable cash withdrawal system, weighing-based charging and recycling, and counting-based charging and recycling, garbage classification and recycling behaviors of residents achieve paid cash feedback, and garbage classification awareness and enthusiasm of the residents are greatly improved.

The invention relates to a production method of an electrochemical active pole piece, and in particular relates to a production method of an electrochemical active pole piece suitable for a lithium ion battery. The electrochemical active pole piece comprises a current collector with an ordered three-dimensional hole structure, an electrode active material and an insulation diaphragm, wherein a, the current collector can be filled and coated with more electrode active materials; b, the electrode active material is filled and coated on the current collector and forms a space network structure with the three-dimensional hole of the current collector; and c, the insulation diaphragm covers two sides of the active pole piece, the tensile strength of the pole piece can be improved, and the active material can be effectively protected. According to the electrochemical pole piece which is prepared by the production method, not only can the conductivity and the heat radiation property of the electrode be remarkably improved, but also the surface density of the electrode material and the strength of the pole piece can be obviously improved, the energy density, and the multiplying charging and discharging capacities of a finished product lithium-ion battery can be improved, and the cycling service life of the finished product lithium-ion battery can be prolonged.

The invention provides a behavior identification method based on a long-time deep time-space network. The method comprises the following steps: constructing an MCFCN (multi-channel feature connected network) model; selecting a video behavioral data set, and extracting a color image sequence data set and an optical flow image sequence data set of each video in the video behavioral data set; and dividing the color image sequence data set and the optical flow image sequence data set into a plurality of fragments according to successive multiple frames, inputting the fragments into the MCFCN model, extracting spatial-temporal features of each fragment successive frame at the lower layer, then, through middle-layer splicing, generating overall spatial-temporal features of each video fragment, connecting the overall spatial-temporal features of the video fragments into overall spatial-temporal features of the video according to fragment sequence, then, fusing the overall spatial-temporal features of the video at the higher layer and finally, outputting the classification result of the video behavior through a softmax layer. Complex behaviors in the video are identified by extracting thespatial-temporal features in a long-time multi-frame image sequence, thereby improving video complex behavior recognition rate and robustness.

The invention discloses a method for reconstructing a running track for a road vehicle based on multi-source data fusion. The method aims to comprehensively and accurately reproduce spatial and temporal distribution and an evolution principle of road traffic situation, thereby improving parameter estimation and prediction accuracy of the traffic situation and improving signal control efficiency. The method which is based on a variational theory of three-dimensional shock wave comprises the following steps of: firstly, estimating a slope of a forward-arc and a backward-arc by using fixed-pointdetector data to establish an initial road-space network diagram; secondly, estimating a curve of queueing propagation by combining floating vehicle data and signal timing data; finally, reconstructing a complete running track for the vehicles based on a shortest path algorithm under constraints of three dimensions including the floating vehicle track, a queueing boundary and the signal timing. According to the method for reconstructing the running track for the road vehicle based on multi-source data fusion, technical problems that the running track of the vehicle is difficult to accurately estimate under current congested situation, and higher permeability is required for current research based on sampling track data are solved.