955results about How to "Guaranteed connectivity" patented technology

An improved light-emitting panel having a plurality of micro-components at least partially disposed in a socket and sandwiched between two substrates is disclosed. Each micro-component contains a gas or gas-mixture capable of ionization when a sufficiently large voltage is supplied across the micro-component via at least two electrodes.

The present invention discloses an efficient architecture for routing in a very large autonomous system where many of the layer 3 routers are attached to a common connection-oriented layer 2 subnetwork, such as an ATM network. In a preferred embodiment of the invention, a permanent topology of routers coupled to the subnetwork is connected by permanent virtual circuits. The routers can further take advantage of both intra-area and inter-area shortcuts through the layer 2 network to improve network performance. The routers pre-calculate shortcuts using information from link state packets broadcast by other routers and store the shortcuts to a given destination in a forwarding table, along with corresponding entries for a next hop along the permanent topology. The present invention allows the network to continue to operate correctly if layer 2 resource limitations preclude the setup of additional shortcuts.

The embodiment of the invention provides a blockchain-based user data authorization method. The method comprises the following steps: storing encrypted user data of user data in a blockchain databasethrough a blockchain node by a first application client; acquiring a request of the user data in response to a second application client to generate authorization information; and instructing the second application client to acquire the authorization information, so that the second application client acquires the user data based on the encrypted user data and the authorization information. According to the method, the encrypted user data are saved in the blockchain database, so that the encrypted user data are prevented from being tampered, and actual user data are not leaked. Moreover, the second application client acquires the user data based on the authorization information and the encrypted user data, so that sharing of the user data among different applications is realized on the basis of ensuring the safety of the user data. The embodiment of the invention also provides a blockchain-based user data authorization device, a medium and computing equipment.

The system comprises: a remote control server end and a terminal computer both comprising IPMI, BMC, and outband NIC. The IPMI of terminal computer comprises: a BIOS update controlling module used to read the fresh flag bit and to decide if the BIOS update file needs to be read and the BIOS needs to be updated. The terminal computer also comprises a update file storing module used to save the BIOS update file and to set the fresh flag bit as ' updating the BIOS'; the BIOS update controlling module deletes the flag bit after updating the BIOS. The remote control server end also comprises a BIOS file transmitting module used for transmitting the BIOS update file to the computer through network.

L2TP packet forwarding apparatus to be connected to at least two LACs (L2TP Access Concentrators) via L2TP sessions to receive packets transmitted from a gateway, which accommodates user terminals, in the form of a L2TP packet encapsulated in Bridge over PPP, has a lookup table indicating the correspondence of tunnel ID / session ID pairs to an identifier (VPN-IDs) of a wide area network to which a plurality of user terminals belong. The packet forwarding apparatus specifies an VPN-ID from the lookup table based on the tunnel ID and the session ID of a received packet and forwards, if it is confirmed that another tunnel ID / session ID pair associated with the same VPN-ID exists in the lookup table, the received packet to another L2TP session identified by the another tunnel ID / session ID pair in the form of a L2TP packet.

A client signal having a constant bit rate is segmented every a bytes to create code information blocks. The bit rate of the client signal is increased such that the client signal has the code information block and an empty area comprised of b bytes, and the ratio c / a is equal to or higher than 110% to create a code block 3 comprised of c bytes. The code information block in the code block is encoded such that an error correcting code is included therein to have an encoding gain of 6 dB or higher for a bit error ratio of 10−12. Associated check bits are placed in the empty area to eventually generate a super FEC signal.

The present invention aims at providing a function-expansion unit for an electronic apparatus that may reduce the stress onto a connector, and provides a high stability with a CCD camera. The CCD camera includes a reinforcing member under its connecting portion and a height-adjustable stand, thereby reducing the stress that would otherwise apply to the USB connector as the connecting portion, enhancing the connection, preventing connector's deterioration in the course of time, and allowing the CCD camera to be stably placed.

An application technology field relates to the navigation, especially the analysis and picking method of the road topological data used in the navigation and setting the data model, which is a road topological data model and computing method used in navigation to treat the road with big area and long distance in navigation map data. The method includes the stratified extracting arithmetic, the road connection calculation function, the hierarchical adjacent node transition table, the road web canton extracting arithmetic and the least cost arithmetic of road net in-out; it mainly solves the technology problem of route calculation of long distance and big area. The invention can insure the connection of whole road web; it can store the starting data of route calculation and improves the route calculation efficient; so it can get the logical analysis result in the logical time and cost range.

A client signal having a constant bit rate is segmented every a bytes to create code information blocks. The bit rate of the client signal is increased such that the client signal has the code information block and an empty area comprised of b bytes, and the ratio c / a is equal to or higher than 110% to create a code block 3 comprised of c bytes. The code information block in the code block is encoded such that an error correcting code is included therein to have an encoding gain of 6 dB or higher for a bit error ratio of 10−12. Associated check bits are placed in the empty area to eventually generate a super FEC signal.

The invention relates to a distributed type multi-robot synchronous swarming control method. The method comprises the steps of: identifying not more than six key neighbor robots in all the neighbor robots with the current position of a robot as a center, the detection distance of a sensor as a radius, and other robots in the circular area as neighbor robots, and designing a position control operator of the current robot by using an attraction-repulsion function among the current robot and the neighbor robots; designing a speed direction control operator of the current robot according to the linearization expression of a Vicsel model; and weighing and integrating the position control operator and the speed direction control operator to form a synchronous swarming control rate of the current robot. The invention visually demonstrates network topology and control action relations among robot positions, breaks the restriction on the scale size of robots, realizes purely distributed type extensible coordination control, guarantees communication of network topology structures in the process of group evolution, and can adjust parameters to avoid collision when the scale of the neighbor robots increases continuously and realize self-adapting to the change of the position relations of the robots.

A metering and charging system of electric energy consists of four parts of data collection, data management, network browse and electronic report. It is featured as using data collection unit and data management unit to form databank for application, using network browse unit to browse data in databank and using electronic report unit to print out required data. The system has unified data platform being able to obtain remote electric energy data and it can ensure uniqueness, completeness and correctness of the data.

A novel single-hop WDM network, the AWG∥PSC network, comprises an AWG in parallel with a PSC. The AWG and PSC provide heterogeneous protection for each other; the AWG∥PSC network remains functional when either the AWG or the PSC fails. If both AWG and PSC are functional, the AWG∥PSC network uniquely combines the respective strengths of the two devices. The throughput of the AWG∥PSC network is significantly larger than the total throughput obtained by combining the throughput of a stand-alone AWG network with the throughput of a stand-alone PSC network. The AWG∥PSC network provides, over a wide operating range, a better throughput-delay performance than a network consisting of either two load sharing PSCs in parallel or two load sharing AWGs in parallel.

The invention relates to a data aggregation method in a wireless sensor network, in particular to a tree-based and time-controlled data aggregation (TBTCDA) method in the wireless sensor network. Under the situation that information on a node position is undetermined, the data aggregation is performed to fulfill the aim of reducing network traffic and node energy consumption and balancing a contradiction between data aggregation accuracy and communication time delay. The method specifically comprises the following steps of: firstly, initializing a network; secondly, initiating a notice of establishing an aggregation tree by Sink; and finally, controlling aggregation time, data acquisition and aggregation, wherein the third step comprises the following steps of: 31) evaluating unit time delay Ta when all nodes participate in aggregation; and 32), setting Ta and the aggregation accuracy P according to an application demand, or receiving data acquired by Ci nodes by a cluster and transmitting aggregated data to a father cluster by a cluster head.

The invention discloses a wireless sensor network distributed hibernation method based on probability statistics, belonging to the technical field of communication network. After distributed hibernation process is started, when being in a redundant state, a node to be tested sends hibernation announcement message to nodes at the same layer, a forward node and a backward node; the forward node modifies the working state of the node to be tested in neighbor node list into a hibernation state; when the node to be tested is not the only one in an activated state in the nodes at the same layer or not the only forward node in the activated state of the backward node, the nodes at the same layer and the backward node modify the working state of the node to be tested in the neighbor node list intoa hibernation state; the node to be tested can be used for closing a wireless communication module and is formally switched into the hibernation state; and after a hibernation timer is time-out, thenode to be tested sends hibernation awaking message to the nodes at the same layer, the forward node and the backward node. The method can guarantee the network connectivity and lead the network nodesto do self-adapting hibernation adjustment according to different application awareness.

The invention discloses a vehicle-used slowly-springback polyurethane foam composite material which is compounded from slowly-springback polyurethane foam and an ethylene-vinyl acetate copolymer. The slowly-springback polyurethane foam is prepared from following components including, by weight, an A material: 40-80 parts of a polyether polyol 1421, 5-40 parts of a polyether polyol 2000D, 5-40 parts of a polyether polyol POP-36 / 28, 0.5-5 parts of diethanolamine, 1-6 parts of water, 0.1-1.5 parts of a catalyst EF-600, 0.1-0.5 parts of a catalyst ZF-10 and 1-6 parts of a silicone oil L-580; a B material: 40-80 parts of a modified MDI. During preparation of the slowly-springback polyurethane foam, a weight usage amount ratio of the A material to the B material is 100:40-80. The vehicle-used slowly-springback polyurethane foam is high in reaction activity, is low in toxicity, is environmental-protective, is high in damp loss factor, is high in sound-insulation performance and is free of addition of a foam-forming agent.

The invention discloses a wireless sensor network relay node deployment method. The method comprises the following steps of 1) obtaining deployment positions of base stations and sensor nodes as well as deployment candidate positions of relay nodes and constructing a heterogeneous communication diagram; 2) selecting a first set XA of the least relay nodes which can perform k-coverage of all the sensor nodes based on the heterogeneous communication diagram; 3) constructing a forwarding communication graph with edge weight based on the first set XA, the deployment positions of the base stations, and the deployment candidate positions of the relay nodes; 4) obtaining a second set XB of the least relay nodes which can connect the first set XA and the base stations based on the forwarding communication graph; and 5) combining the first set XA and the second set XB and constructing a final solution. The wireless sensor network relay node deployment method is capable of ensuring the network connectivity, guaranteeing that each sensor node has at least one path to connect with the corresponding base station, and also ensuring that the fewest possible relay nodes are deployed on the premise of ensuring the network connectivity.

The present invention provides one kind of magnetically controlled sputtering process of making printed circuit board. The process includes the following steps: drilling holes on the single layer base material; magnetically controlled sputtering the bottom dielectric and metal layer on the drilled single layer base material; magnetically controlled sputtering conducting copper layer on the single layer base material; drilling holes on multilayer board; magnetically controlled sputtering bottom dielectric and metal layer on the drilled multilayer board; magnetically controlled sputtering conducting copper layer on the drilled multilayer board; and repeating the foregoing steps until reaching the required layer number of the printed circuit board. The present invention combines unique hole forming method and sputtering method and has raised copper-plating and hole-metallizing efficiency, raised reliability and high fine circuit making capacity.

The invention relates to a pneumatic tyre. At least three main grooves (1,2) extending towards the perimeter of the tyre and a plurality of horizontal grooves (3) extending towards the width direction of the tyre and communicating between the main grooves are mounted on a tyre tread part (T) and a plurality of pattern blocks (5) are divided using the main grooves (1,2) and the horizontal grooves (3), characterized in that: a central main groove (1) on a tyre equator (E) is formed into a straight line shape and the horizontal groove (3) is arranged and inclined by 40-60degree relative to the tyre perimeter and an ascending part (3a) is formed at the part of the horizontal groove (3) communicated with the central main groove (1) to make the groove width and the groove depth of the horizontal groove (3) proportionally change and the groove depth (D3a) of the horizontal groove (3) is 40-60% of the groove depth (D1) of the central main groove (1) and the minimum groove width (W3a) of the horizontal groove (3) is 30-50% of the maximum groove width (W3). The pneumatic tyre well keeps the wet road and simultaneously improves the operation stability during driving on the snow road and the dry road.

The invention provides a V2X-based roadside unit system and an information distribution method thereof. The system mainly comprises a communication network management module, a message proxy module, an information security component module, a log management component module, a message bus interface module and the like. An RSU (roadside unit) message proxy module is responsible for parsing, priority scheduling and distribution of messages, sent by an application layer through a message bus interface, to a message bus. The RSU communication network management module is responsible for shieldingprotocol difference of a platform and RSU auxiliary communication equipment, and a unified communication calling interface is provided for middleware message proxy. According to the system and the method in the invention, heterogeneous network multi-source information from a road sensor, a vehicle, a cloud platform, a differential positioning base station and the like is managed through the V2X RSU in a unified way, a unified communication calling interface is provided for an upper-layer application, and the application development efficiency and the function expandability are improved; the messages are scheduled on the basis of a priority policy so as to ensure that the information with relatively high information tightness is preferentially sent.

The invention relates to a layer-based clustering routing protocol method applied to a three-dimensional underwater acoustic sensor network. Under the conditions of a known monitoring range and a node maximum transmission distance, optimal layer number guaranteeing the network connection and optimal cluster head number under the condition that the layer number is given are determined; in the stage of selection of the cluster head, the position of a node participating in cluster head selection is limited, and the node participating in the selection decides whether to be a cluster head according to a competitive factor; in the stage of formation of an inter-cluster routing, the cluster head selects a cluster head node which is one layer higher and is closest to self as a relay node; in a stable data transmission stage, member nodes transmit the information to corresponding cluster heads, the cluster heads compress the received information and then send the compressed information to the relay node or a base station. The method can effectively balance the energy consumption of the network nodes and save the total energy consumed in the network.

The invention provides an automatic test platform and a test method for a blade type server. The test platform comprises a plurality of types of test equipments, a monitoring computer, a controller, aclient and a computer product under test. The devices are connected with each other through local area network. The corresponding tested modules of the tested computer products are respectively connected with the corresponding interfaces of the corresponding test equipments of various types; The controller controls the testing process of all computer products under test, and executes test flow instructions edited by the user, The instructions arrive at the monitoring computer through the network, the corresponding test equipment is parsed and controlled, the corresponding test items are executed, the instruction information is recorded in the database, the test data fed back by the test equipment is forwarded to the monitoring computer through the network, the monitoring source code is parsed by loading different parsing files, and the test data is stored; users use clients to log on to query the corresponding working status and test information status, and carry out query, return visits and analysis on the data as required.

The invention discloses a wireless sensor network topological control method based on potential games. A network model is determined, and a sensor network is expressed by a planar topological graph, and a connected network is determined, and then a TCBPG is established. According to the TCBPG, a payoff function of the game is determined to guarantee a Nash equilibrium solution existing in the game, and the TCBPG is defined as an ordinal potential game. After the TCBPG is determined according to the above mentioned steps, a distributed energy consumption equalization topological control algorithm is realized, and is divided into a neighbor discovering phase, a game executing phase, and a topology maintaining phase, and then a stable wireless sensor network topological structure is acquired. From a power control and energy consumption equalization angle, residual energy of nodes and transmitted power of nodes are comprehensively considered to design a new utility function, and a distributed topological control algorithm based on the potential games is provided. According to theoretical analysis and simulation results, the topology constructed by the algorithm is capable of realizing the Nash equilibrium, and is capable of guaranteeing the good characteristics of the network such as connectivity and energy consumption equalization, and therefore the life cycle of the network is prolonged.

The present invention discloses a wireless sensor network energy conservation method which is designed basing on the cross-layer, a MCU Active mode and a MCU Sleep mode are arranged on the processor MCU in the wireless sensor network, an ADC Active mode and an ADC Sleep mode are arranged on an analog-to-digital converter ADC, a MTRU Sleep mode, a WTRU Tx mode and a WTRU Rx mode are arranged on a wireless date sending module / receiving module respectively, and sent from a surveillance center according to the control command designed by the primitive to control the accesses of the different modes after being sent by the processor MCU, so as to conduct a cross-layer energy conservation optimization from an application layer, a network layer, a link layer and a physical layer of the wireless sensor network. Under the premise of not influencing the application performance and function, the present invention reaches the effect of reducing the whole energy consumption of the nodes, and greatly prolongs the use life of the batteries used on the nodes and greatly lengthens the life span of the network.

The invention discloses a binarization processing method for an adaptive text image based on pixel neighborhood features by using global and local thresholds. First, the global brightness adjustment is performed on the text image to increase the proportion of darker parts in the image and improve the brightness of the text. The gray contrast between the target character and the background in the image; then, the bicubic interpolation algorithm is used to scale the text image to increase the gap between the character strokes; then, the stroke width d of the target character is counted to determine the neighborhood calculation template Then, according to the size of the determined field calculation template, the text information of the text image is divided into text blocks; finally, the method of combining global and local thresholds is used to perform point-by-point binarization on each text block. The invention can effectively separate the character strokes from the background, avoid broken strokes, artifacts and other phenomena, maintain the connectivity of the strokes, reduce the calculation of local thresholds for pixel points in the text image, and greatly improve the calculation speed.

The invention discloses an intelligent electromechanical equipment data interaction method and system based on LoRa communication. The system comprises a LoRa terminal, a LoRa gateway and a cloud service platform; according to the method, a private protocol for communication between a LoRa gateway and a LoRa terminal is self-defined; the method comprises the steps that a LoRa terminal is connectedwith a LoRa gateway; and the LoRa terminal executes a corresponding operation according to a command issued by the LoRa gateway; the LoRa gateway receives and processes the data uploaded by the LoRaterminal; a novel rate self-adaptive algorithm is designed on the basis of a private protocol of LoRa communication; the characteristics of multiple spreading factors and multiple data rates of the LoRa communication technology are fully utilized, to automatically allocate different spreading factors to the LoRa terminals in different distance ranges of the LoRa gateway to ensure network connectivity, the quality of wireless receiving signals of the LoRa terminals and the condition of a transmission channel are analyzed, and the data transmission rate of the LoRa terminals is adaptively adjusted. The probability of LoRa wireless channel collision is reduced, and the throughput and real-time performance of data uploading are improved.

The invention relates to an artificial knee joint bone fusion prosthesis. The artificial knee joint bone fusion prosthesis comprises a femur condyle prosthesis, a tibia platform prosthesis and a joint pad, wherein the femur condyle prosthesis comprises a joint surface, a condyle combination surface, a intercondylar combination surface, a positioning body, a femur intramedullary stem and a femur intramedullary extending stem; the tibia platform prosthesis comprises a platform body, a tibia combination surface, a wing plate or a positioning body, a tibia intramedullary stem and a tibia intramedullary extending stem; the femur intramedullary stem, the femur intramedullary extending stem, the tibia intramedullary stem and the tibia intramedullary extending stem are hollow, the surfaces of the intramedullary stems and the extending stems have porous or mesh structure so as to ensure that the hollow parts in the stem body can be communicated with the external part; when in use, autograft or allograft crushed bone particles are filled in the hollow parts of the intramedullary stems and the intramedullary extending stems, and after the external bone tissue fuses and grows together with the crushed bone particles filled in the intramedullary stems, the overall elastic modulus can be very close to that of the human bone, thus reaching the aim of effectively preventing the loose between the artificial knee joint bone fusion prosthesis and the sclerotin for long time.

The invention discloses a loudspeaker module which comprises a shell and a single loudspeaker. A cavity for fixedly containing the single loudspeaker is formed in the shell, the cavity is divided into a front sound cavity and a rear sound cavity by the single loudspeaker, a sound outlet hole is formed in the shell, the front sound cavity is communicated with the sound outlet hole, a partition plate is arranged in the rear sound cavity and matched with the shell to separate an independent cavity from the rear sound cavity, the independent cavity is filled with sound absorption particles, and a through hole penetrating the partition plate is formed in the partition plate. The loudspeaker module is simple in structure and overcomes the shortcoming that the sound absorption particles enter the single loudspeaker along with airflow, the number of the sound absorption particles is increased, sound absorption effects are improved, and the acoustic performance of the loudspeaker module is improved.

In various exemplary embodiments, the present invention provides improved card guide and heatsink assemblies for pluggable electro-optic modules utilized in optical communications networks and the like. More specifically, the present invention provides a solderable surface-mounted card guide assembly and a staggered heatsink assembly. These assemblies are utilized with small-form factor pluggable electro-optic modules and the like, and the concepts presented herein can be extended to XFP, XENPAK, XPAK, and X2 electro-optic modules, for example. The solderable surface-mounted card guide assembly of the present invention finds particular applicability with small-form factor pluggable electro-optic modules not utilizing any type of module cage, while the staggered heatsink assembly of the present invention finds particular applicability with small-form factor pluggable electro-optic modules both not utilizing and utilizing any type of module cage.

The invention discloses a road coupling method and an apparatus thereof. The method comprises the following steps: determining a candidate coupling road at a current GPS point; calculating direction deviation of the current GPS point and the candidate coupling road; inputting the distance and the direction deviation of the current GPS point and the candidate coupling road to a position probability model, obtaining the position probability of the current GPS point on the candidate coupling road; selecting the communicated candidate coupling road in the candidate coupling road of the current GPS point; according to the position probability of the current GPS point on the communicated candidate coupling road and position probability of the candidate coupling road having a communication relation with the communicated candidate coupling road of the last GPS point, calculating the position comprehensive probability of the current GPS point on the communicated candidate coupling road; and selecting the communicated candidate coupling road with highest position comprehensive probability as the coupling road of the current GPS point. According to the invention, problem of inaccurate coupling of the GPS point and the road in prior art can be solved.