32results about How to "Extended life cycle" patented technology

The invention relates to a method for establishing a trust mechanism of a network hierarchical routing protocol of a wireless sensor, comprising the following steps of: collecting successfully interacted histories of a node in a cluster in a round of time slots by a cluster head node; recording the successfully interacted histories of the cluster head node in a round of time slots by a secondary cluster head node; forming the current trust values of all nodes; after gathering the current trust values of all the nodes by a sink node, combining a historical trust record, synthesizing a final trust value TV of each node; dynamically evaluating all nodes by the sink node according to the level of the final trust value of the whole network to divide the nodes into a creditable level, a generallevel and a trustless level; finally, dividing and selecting the creditable nodes as candidate cluster heads according to the levels; and excluding the trustless nodes out of the network. The invention enables the nodes to reliably complete work tasks, is not influenced by node failure and hostile attack and prolongs a life cycle of a clustering network.

The invention discloses a wireless sensor network for monitoring an irrigation area and a communication protocol of the wireless sensor network. A star topological structure is adopted in the wireless sensor network and comprises an information management center, a sink node and a plurality of sensor nodes deployed around the sink node and used for exchanging information with the sink node in a one-hop manner. Aiming at the characteristics of no limit to energy of the STAR-WSN (Wireless Sensor Network) sink node and more adoption of star structures, the communication protocol is used for improving a TDMA (Time Division Multiple Access)-based MAC (Media Access Control) protocol, and adopts an MAC protocol-STAR MAC oriented to single-coverage WSN monitoring application. According to the invention, automatic acquisition, transmission, display, storage and processing on site information of the irrigation area can be realized, and irrigation area management efficiency is increased, water utilization rate is increased, purposes of scientifically using water and saving water are achieved, and positive effects can be generated for developing agricultural economy and water conservancy economy of the irrigation area, effectively enlarging irrigation area, building a better ecological environment and realizing sustainable development of irrigation area economy.

The invention discloses a wireless sensor network node device used in an underground coal mine, which belongs to a hardware platform for personnel positioning and environmental monitoring based on a wireless sensor network in the underground coal mine. The wireless sensor network node device used in the underground coal mine is provided with wireless sensor fixed nodes (1) and wireless sensor mobile nodes (2); the sensor fixed nodes (1) are placed on a tunnel wall from space to space in the underground coal mine; and the sensor mobile nodes (2) are worn by mining personnel. The device has the following advantages: 1) the device has high positioning accuracy, and the mobile nodes carried by the personnel transmit wireless signals to communicate the approaching fixed nodes so as to determine the position of the device and improve the positioning precision; 2) both the wireless sensor fixed nodes and the wireless sensor mobile nodes have the capacity of bidirectional communication so as to accurately position the position of the personnel; 3) the design cost of the wireless sensor nodes is comparatively low, large amount of nodes can be arranged, and drain regions and blind points of positioning and monitoring are avoided; and 4) the arranged wireless sensor fixed nodes do not need wire connection, so the cost is low.

The system for monitoring flood of reservoir includes node cluster in sub area, electronic water gauge, RS232 interface circuit, terminal data processor (TDP), sensing node, and terminal concourse node (TCN). Rainfall sensing nodes and electronic water gauges in the node cluster in sub area transmits collected rainfall data and water level data to concourse node in the place located respectively. Then, the data are fed back to TCN in data center of flood terminals according to flooding mode or mechanism of geographical energy active route (GEAR) along direction of data transmission grads. Flood of reservoir is obtained in real time after processing by TDP. The invention can collect rainfall amount of reservoir area in real time, water level, and information of runoff. Advantages are: reliable communication, good real time performance, accurate measure, minor power waste, and low cost.

An updating method for low power dissipation systems is disclosed, which uses differential compression in the application of wireless sensor network. The method includes the following steps: (1) dividing an old code file and a new code file into a plurality of pages which are bytes of a section of continuous addresses; (2) comparing the old code file with the new code file to generate a differential code file; (3) transmitting the differential code file to an updated node from the publishing node in a multi-hop communication way; (4) the updated node re-generates a new code file according to the differential code file and the old code file to complete the updating. The invention has advantages of good generality, short update delay, less data transmission, high energy consumption efficiency and perfect reliability.

The invention provides a wireless sensor network based on a dynamic routing mechanism, and a topology control method for the wireless sensor network. The wireless sensor network consists of a sensor node, a convergence node, and upper computer software. The method mainly comprises three steps: firstly building network topology through the dynamic routing mechanism; secondly carrying out estimation according to RSSI and LQI indexes, and then adjusting the emission power of the sensor node; and finally carrying out the maintenance of the structure of the network topology, thereby guaranteeing the connectivity and reliability of the network. The method based on power control can reduce the interference among signals, improves the stability of the network, and prolongs the life cycle of the network.

The invention relates to a wireless sensor network coordinator re-selection algorithm based on assistance of a cellular network. The wireless sensor network coordinator re-selection algorithm comprises the steps of creating a cluster head node information table which is stored in each cluster head node of a wireless sensor network under integration architecture of the cellular network and the wireless sensor network; utilizing power control technology to improve a WSN neighbor node list; sending the collected cluster head node information table and the WSN neighbor node list by a central PAN network coordinator to a base station of the cellular network; traversing each cluster head by the base station of the cellular network according to the cluster head node information table and the WSN neighbor node list, and calculating the selection probability of each cluster head based on a probability formula of a cluster head selection central PAN network coordinator; and selecting a cluster head whose node depth is half of an original WSN maximum network depth as a new central PAN network coordinator. According to the invention, the WSN maximum network depth can be effectively reduced, waste of node energy is reduced and the service time of the WSN network is significantly extended.

The invention discloses a wireless sensor network routing method based on a software defined network. In the case of emergent service of a monitoring area, a monitoring center executes a routing adjustment process, and the method comprises the following steps: selecting an access node according to the dump energy of SDSN nodes, executing minimum hop routing discovery, calculating optimal access node transmitting power and link service flow rate matrixes according to a data service condition and a power upper limit of the access node in the network, generating a mirror image file according to the calculation result and transmitting the mirror image file to the SDSN nodes, receiving the mirror image file distributed by the monitoring center by the SDSN nodes, and reprogramming and adjusting the transmitting power and routing. The entire routing protocol can be verified on a platform which is established based on CC2530 and PC. The method is used for effectively decoupling a control plane and a data forwarding plane in the network, compensating the defects of poor astringency and adjustment delay of the traditional sensor network distributed algorithm and ensuring the stability and the robustness of the network.

The invention relates to a gel type ice and snow material with adjustable solidification temperature and transmittance and a preparation method thereof, wherein the preparation method comprises the specific steps: firstly, taking an acrylamide polymerization monomer, a cross-linking agent, an initiator, a catalyst, a solidification temperature and transmittance regulator as raw materials to prepare an acrylamide ice and snow material; secondly, taking sodium alginate, a solubilizer, soluble divalent / trivalent metal ion salt, a crosslinking speed regulator, a plasticizer, a gelatinizing agent,a solidification temperature and a light transmittance regulator as raw materials, and carrying out ionic crosslinking to obtain the sodium alginate gel type ice and snow material. By blending the rawmaterial components, the solidification temperature of the gel type ice and snow material can be regulated and controlled within a wide range, and the synthesized material has the characteristics ofgood formability and easiness in processing.

The invention discloses an active moving method of a moving sink node in a wireless sensor network, and belongs to the technical field of the wireless sensor network. According to the method, on the basis of a tree form route multi-hop interconnection model of the wireless sensor network, one-hop neighbor nodes of a current sink node are taken as subtree roots, subtrees are divided to form subtree sets, and the maximum value and the minimum value of remaining energy of a sensor node in each data propagation path in each subtree within a certain range are obtained through the sink node; then according to certain conditions, a dying node sequence and a sink feasible moving position sequence are generated; the sink node selects a proper position in the sequences to move. The sequences are stored in the sink node for a long time and are updated according to energy of a node of the next round. Accordingly, the sink node can be guided to move by mastering extreme values of network energy within a certain range in real time, energy balance among network nodes can be achieved gradually, and time and energy cost brought by a large quantity of repeated inquiries can be effectively reduced at the same time.

The invention discloses a wireless sensor network routing energy saving method based on a particle swarm, and relates to the field of a wireless sensor network. The wireless sensor network routing energy saving method comprises the following steps of: acquiring a fitness function for selecting cluster heads, carrying out iteration on the fitness function by a particle swarm algorithm, searching wireless sensor nodes with large fitness values and using the selected wireless sensor nodes as the cluster heads in the network; broadcasting the selected cluster heads to other wireless sensor nodes, so that other wireless sensor nodes, according to strength of received broadcast signals, sense distances with the cluster heads to select which clusters to add; and enabling the cluster heads to receive environment information data sent by other wireless sensor nodes, carrying out fusion on the environment information data, then sending the fused environment information data to a convergent node, and ending communication. According to the wireless sensor network routing energy saving method based on the particle swarm, residual energy information and position information of the nodes are sufficiently considered, and the suitable cluster heads are selected by particle swarm optimization so as to balance energy consumption of the network and prolong the life cycle.

The invention discloses a telemetry and telecontrol method of distributed cluster aircraft system and belongs to the technical field of distributed cluster aircraft telemetry. The method comprises the steps that each member node broadcasts handshake information and receives coordinate information transmitted back by other nodes, according to the coordinate information, relative distance between every two member nodes is computed, information transmission is carried out between each member node and another member node which is closest to the member node in relative distance, and accordingly a communication link between every two member nodes is established, the hop number of each communication link is recorded; a member node which has a space-ground measurement and control function is used as zero-link node, other member nodes are distributed into different rings according to the hop numbers of the communication links between the member nodes and the zero-link node, during telemetry, telemetry information is transmitted from the outermost link to inner links in sequence according to the established communication links, and during telecontrol, telecontrol instructions are transmitted from the zero link to outer links in sequence according to the established communication links. The telemetry and telecontrol method achieves energy management of a telemetry and telecontrol process.

The invention relates to a data transmission method of wireless sensor network to classify node time to busy time and idle time, periodically transmit routine monitoring data in nodes in busy time and ensure realization of environmental monitoring task. When network sends an emergency data, the emergency data is prioritized in transmission to ensure that emergency is acquired by control center in time. The method of data transmission of wireless sensor network ensures that network can make environmental monitoring while discovering emergency and making quick response and processing in time. The method of data transmission of wireless sensor network can guarantee routine monitoring on the environment while discovering network emergency in time and taking the priority to transmit data to control center in time. Meanwhile, nodes may reserve sleep state, facilitating saving energy consumption and extending life cycle of network.

The invention discloses an efficient routing method of a wireless sensor network. Firstly, according to the network topology structure of the wireless sensor network, a node is selected as a cluster head in each cluster; a ratio max of the residual energy of all nodes on the path from a common node in each cluster to a head of the cluster plus the collected energy and the consumed energy is calculated; according to the ratio max of all the obtained paths, a path with the largest ratio max is selected to upload the data to the cluster head; then, the data is transmitted to the base station or the terminal equipment through the cluster head of each cluster. This method not only prolongs the lifetime of WSN but also optimizes the routing efficiency by maximizing the energy utilization of sensor nodes in outdoor WSN.

The invention discloses a reversible lane traffic signal lamp system. The reversible lane traffic signal lamp system comprises an information layer, a control layer and an equipment layer. Through information interaction of equipment of layers, the reversible lane traffic signal lamp system can monitor a site road state in real time and achieve adjustment through the real-time road state to easilycope with various road conditions and to ease traffic. The reversible lane traffic signal lamp system adopts technology, equipment and platforms, which are mature and good in performance, to ensure along service life, thereby meeting the current requirements and adapting to future development; meanwhile, the reversible lane traffic signal lamp system is efficient and stable and can provide 365-day and 24-hour continuous operation. Installed servers, terminal equipment, network equipment, control equipment and wiring systems can fully adapt to severe working conditions to ensure system stability. Through functions of a double communication link design, a server redundancy design and the like, the reversible lane traffic signal lamp system can greatly enhance reliability.

The invention relates to a method for transmitting data among clusters of a wireless sensor network, and belongs to the field of real-time embedding. An ant colony algorithm has the characteristics ofdistribution, positive feedback and the like, and is suitable for solving the problem of combination optimization. The method comprises the following steps: firstly, initializing an ant colony, thenconsidering factors which may influence a network life cycle, further formulating a fitness function, and formulating a new state transition probability calculation formula in combination with an original classical ant colony algorithm; calculating the state transition probability value of each cluster head, judging the cluster head of the next hop, updating the local pheromone in the single iteration process, and finding out a complete traversal path according to the method; then carrying out pheromone updating on each path, subtracting the energy consumption balance factor from the ratio ofthe minimum residual energy to the maximum residual energy in the path , and fusing the difference into an updating rule to control the increase and decrease of the pheromones. The corresponding relations between the cluster head and the ant colony node are established, energy conservation and energy consumption balance are fully achieved, and the life cycle of an incoming network is effectivelyprolonged.

The invention discloses a residual energy sorting load scheduling method and a residual energy sorting load scheduling system. The method comprises the following steps: step one, solving (alpha(1), alpha(2),..., alpha(n)) based on a typical divisible load scheduling algorithm, wherein alpha(i) represents a task; step two, sorting nodes in order by taking the residual energy of each node as a keyword to construct a new sequence (beta(1), beta(2),..., beta(n)), wherein beta(1), beta(2),..., beta(n) correspond to the nodes in a network; and step three, sequentially assigning the tasks (alpha(1), alpha(2),..., alpha(n)) to the nodes which are sorted in step two. According to the invention, the energy efficiency is greatly improved and the life cycle of the whole wireless sensor network is prolonged on the basis that the resource load is not increased obviously.

The invention provides a distributed wireless network trusted routing establishing method based on an information theory. In each node period in a distributed wireless network, successful forwarding probabilities of neighbor nodes in a one-hop range are subjected to statistics, and trust measurements of the neighbor nodes are calculated. In a process that a source node initiates a routing request and a target node carries out routing reply, a node on a path converges trust measurement values of the neighbor nodes, which are subjected to statistics by the node, to the source node, the source node modifies a trust measurement of a common node on the path by adopting a method based on a capacity region, and finally, a path with the optimal trust measurement is selected to establish a routing. According to the distributed wireless network trusted routing establishing method based on the information theory, which is provided by the invention, nodes at different topology positions in a network further carry out accurate modification after acquiring trust measurements of relay nodes on the path so as to differently select the optimal trusted path and avoid congestion caused by a case that service grouping is centralized to a certain relay node. According to the invention, when the trust measurement of the routing is considered, load balance of the network is also considered, so that end-to-end performance of the network is promoted.

The invention discloses a processing technology of paraffin flowers. The processing technology comprises the following steps: S1, selecting materials; S2, performing bulb treatment; S3, performing paraffin treatment; and S4, carrying out coating treatment. According to the method, Hippeastrum vittatum bulbs are selected as the flower material of the paraffin flowers, the flower material belongs to bulb flowers, a large amount of nutrient substances can be stored in the bulbs, the flowers cannot die in a short time, the balloons are arranged on the bulbs in a sleeving mode, irregular surfaces can be covered with the balloons, the balloons can be evenly covered with paraffin, and the sponges are arranged in the balloons, the sponge is moistened by a nutrient solution, so that the life cycle of flowers can be effectively prolonged, and the seed balls are coated by the paraffin, so that the growth of plant roots can be completely blocked, and all nutrients of plants are provided for accelerated growth of flower buds in the seed balls. Since the bulbs have no roots, watering, fertilization and later pest and disease damage management are not needed, and the time for people to manage flowers is saved.

The invention relates to a method for accelerating vBNN-IBS authentication in a wireless sensor network. The problem that the public key encryption system is slow in node authentication speed and large in energy consumption under the existing wireless sensor network environment can be solved. The method comprises the following steps: one, performing key extraction for a user to obtain a private key of the user; two, producing the signature of the user by using the private key of the user obtained in the step one; and three, verifying the produced signature of the user. In the wireless sensor network, the authentication speed is accelerated by transmitting a computing result to a neighbor node through one node; the neighbor node can reduce the computation amount as long as the node transmits the computing result, thereby lowering the energy expenditure of the sensor node and effectively accelerating the authentication efficiency; the authentication time is reduced, and the life cycle of the network is improved. The method disclosed by the invention is used for the technical field of the wireless sensor network node authentication.

The invention relates to an automatic ink removing device which comprises a page dividing wheel (2) driven by a gear (1) to rotate. Paper is divided into single pages and conveyed to a fixed table (4)through a paper feeding wheel (3), and six front-back fixed wheels (5) (6) are driven by two motors (7) (8) to rotate to compress and fix the paper. A motor (9) drives an erasing arm (12) perpendicularly fixed to a horizontal arm (11) by four springs (10) to complete horizontal motion of erasing on the paper fixed to the fixed table (4) in the direction of a guide rail sliding table (13). After erasing is completed, the motors (7) (8) drive the six front-back fixed wheels (5) (6) to be lifted, and the paper is taken out through the horizontal motion of the erasing arm (12). Therefore, the automatic ink removing device has the beneficial effects that the function of erasing paper writings fully automatically is achieved without pulverizing, the paper can be utilized many times, and the life cycle of the paper is increased; energy saving and environmental protection are achieved, and sustainability of ecology is achieved; and manual operation can be replaced, the effect is good, efficiency is high, and cost is low.

The invention relates to the technical field of computers, in particular to a multimedia information playing control method and device, electronic equipment and a storage medium, and is used for improving the stability of multimedia information consumption. The method comprises the following steps: determining a plurality of pieces of original multimedia information meeting a target condition; respectively obtaining virtual multimedia information corresponding to the plurality of pieces of original multimedia information, wherein each piece of virtual multimedia information and the corresponding original multimedia information have the same orientation condition and recommendation content and different delivery parameters; after a multimedia information playing request sent by a client is received, screening out target multimedia information conforming to the multimedia information playing request from the multiple pieces of original multimedia information and the virtual multimedia information based on the orientation condition and the delivery parameter; and performing multimedia information playing control based on the target multimedia information. According to the invention, the virtual multimedia information can independently participate in each stage of multimedia information competition, so that the stability of exposure consumption of the multimedia information is improved.

The invention discloses a sensor node communication optimization method and apparatus, and a readable storage medium. The method comprises the steps: determining an undirected graph set according to apre-constructed sensor network; dividing the sensor network into a plurality of node groups based on the undirected graph set through a preset group division method, wherein the node groups are not intersected with each other; selecting a main sensor node from the node group; performing data acquisition based on the main sensor node. According to the method, reasonable data aggregation can be carried out on the whole wireless sensor network, node energy consumption is reduced, and the method has important significance in prolonging the life cycle of the network.

The invention discloses a trichlopyr, dicamba and glyphosate-containing complex herbicide, active ingredients include glyphosate, dicamba and trichlopyr, the weight ratio of glyphosate to dicamba to trichlopyr is 1-90:1-90:1-90, and the content of glyphosate, dicamba and trichlopyr accounts for 62% of the total weight of the complex herbicide. The complex herbicide can be made into a wet powder, a soluble powder, a water agent and a microemulsion. The complex herbicide can reduce the resistance of weeds, and has the characteristics of short seed death time and high seed death rate.

The invention relates to a navigation positioning technology, and discloses a low-power consumption GPS positioning method, which comprises the following steps that a base station gateway acquires a real-time ephemeris and broadcasts the ephemeris; the positioning device receives the real-time ephemeris after being awakened, enters a hot start mode to obtain specific position information, uploads the specific position information to the base station gateway, and then enters a sleep mode; the base station gateway receives the specific position information and further performs back-end processing; The present invention further comprises the low-power-consumption GPS positioning system comprises a positioning device, a base station gateway and an A-GNSS server, and the base station gateway is in network interaction with the A-GNSS server. The positioning device and the base station gateway transmit and receive information through the wireless communication module. Compared with a GPS hot start mode, only a part for receiving data is added, and data request transmitting, network interaction time and corresponding power consumption are removed, so that the positioning device is always in an ultra-low power consumption state, the service cycle of a battery is greatly prolonged, and the service life of the battery is greatly prolonged.

The invention discloses a composite continuous pipe gas production method which comprises the steps: mounting a composite continuous pipe with a working channel with the adjustable sectional area in a gas production well, wherein a gas production channel of the gas production well comprises the working channel; and when the height of an accumulated liquid in the gas production well reaches a preset threshold value, reducing the sectional area of the working channel, so as to increase the flow speed of the gas in the well flowing through the gas production channel. A natural gas well can be continuously produced by adjusting the section of the working channel, so that time and manual operation are effectively saved, the production efficiency is improved, and the production cost is reduced.

Node equipment for Beidou networking of ships comprises a case and a cover plate. The cover plate is in slidably detachable connection with the case, a mounting beam is arranged in the case, the casecomprises a front panel, two side panels and rear panel, and the mounting beam is detachably connected with a user equipment module, a control board and a compressed gas cylinder. The front panel is provided with an interface area which is provided with at least a plurality of interface modules. The Node equipment for Beidou networking of the ships has advantages that by a totally-closed structure, an internal circuit board and an exposed metal-part-containing joint portion are well protected, and accordingly the life cycle of the equipment in a ship utilization environment is effectively prolonged. The invention further provides a utilization method of the node equipment.

Embodiments of the invention provide a routing method and device for guaranteeing balanced node energy consumption. A specific embodiment of the method comprises the following steps: creating an initial Mesh network; respectively calculating life cycles of the initial Mesh network in a single-hop communication mode, a multi-hop communication mode and a hybrid communication mode, and selecting an optimal communication mode of the initial Mesh network from the communication modes based on the calculation results; based on the selected optimal communication mode, calculating numbers of redundant cluster head nodes at positions where cluster head nodes are located, when the initial Mesh network reaches balanced energy consumption; allocating corresponding calculated numbers of redundant cluster head nodes to the positions where the cluster head nodes are located to obtain a Mesh network with balanced node energy consumption; and using the cluster head node with the largest residual energy as a movable cluster head node at the position where each cluster head node is located, in order to bear routing services of the Mesh network with balanced node energy consumption. By adopting the routing method and device in the embodiment, the life cycle of the network can be prolonged.