953results 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.

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.

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.

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.

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 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 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 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 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.

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.