30 results about "Flooding algorithm" patented technology

The invention provides a long-distance concentrated ammeter reading system based on a flooding algorithm. The ammeter reading system is characterized by comprising a master ammeter reading station, a general packet radio service (GPRS) network, a concentrator and an electric carrier ammeter, wherein the master ammeter reading station and the concentrator are provided with GPRS modules and communicated through the GPRS network; and the concentrator and the electric carrier ammeter are communicated through an electric wire. By using the system, the disadvantages of the traditional ammeter reading mode are overcome, thereby completing functions such as data acquisition, measurement, transmission, settlement and the like, realizing functions such as long-distance reading, inquiry, payment, intelligent control and the like. The system has the advantages of small work load, large transmission data quantity, high veracity, low expenditure and the like; and a modern automatic technique is used for replacing manual management, thereby improving efficiency.

The invention discloses a BP decoding method based on the Tanner sheet margin scheduling strategy. The Tanner sheet margin scheduling is adopted in a decoding process, and parallel transmission is performed to accelerate the decoding iteration speed. On a check node updating part, a diversity processing mode is adopted, when a verification equation is not tenable after several iterations, and a check node transmits information with all neighbor nodes so as to improve the reliability of the check node; when the verification equation is tenable, and the reliability of the check node is smaller than a reliability threshold, the check node only needs to perform information transmission with the previous w nodes smaller than LLR information, thereby reducing the partial computation complexity;the rest check nodes do not perform information transmission, so that the computation complexity of the algorithm is further reduced, the transmission of the LLR information along the edge is inhibited, and the BER performance is improved. The simulation results show that when the signal to noise ratio is 3.0dB, the computation complexity of the EDBP algorithm is only 42% of the BP algorithm, andthe computation complexity is reduced, and the BER performance of the EDBP algorithm is better than that of the Flooding algorithm.

The invention discloses a context-dependent non-uniform clustering routing algorithm. According to the context-dependent non-uniform clustering routing algorithm, the defect that clustering and route are isolated from each other by a traditional hierarchical routing model is overcome, information at a clustering stage is applied to a routing formation stage, set-up time of a network is largely shortened, and energy consumption of the network is reduced. Based on a clustering algorithm of a vote mechanism, the context-dependent non-uniform clustering routing algorithm optimizes energy consumption of an area, a time-sharing reversed flooding algorithm is used, and energy consumed by route discovery is largely saved. The context-dependent non-uniform clustering routing algorithm can be effectively applied to large-scale area monitoring, energy load balancing of the context-dependent non-uniform clustering routing algorithm is confirmed, node behavior is stable, and network lifetime is much longer.

The invention discloses a Bluetooth mesh routing method based on an improved flooding algorithm, and the method comprises the steps: obtaining the related information of a neighbor node through a datapacket in a network, determining a forwarding threshold value according to the related information, and limiting the number of forwarding nodes; determining the forwarding probability of forwarding data packet nodes according to the distance between the two nodes and the residual energy of the nodes, determining the forwarding waiting time according to the forwarding probability, and performing time-sharing forwarding; if repeated data packets are received again after any node sends one data packet, it is considered that transmission of the data packets is successful, otherwise, it is considered that the data packets are lost, and the node sends the data packets again until transmission is successful. On the premise of ensuring the transmission reliability, the network energy consumptionis effectively reduced and balanced, so that the method is applicable to a wider application scene, and the value of the Bluetooth mesh is further improved.

The invention discloses a crawler technology based on a block chain system, which comprises the following steps of: 1, adding a public key open node on an existing node in a block chain network; step2, after a node in the block chain system is started, accessing a nearby public key open node according to self-starting configuration, and carrying out public key information registration on the public key open node; 3, after the crawler is started, searching for nearby public key nodes, and downloading cache public key node information; 4, performing data crawling according to the clue information; and 5, processing crawling of the nodes by the crawler in the system by adopting a flooding algorithm, setting TTL corresponding values, and when deep crawling is carried out according to clue information, and if the TTL set values are exceeded, ending crawling of the clues. The method is mainly used in a block chain system, greatly plays the storage characteristics of the block chain, and isbeneficial to the development of the block chain application.

The invention discloses a barrier lake flooding range surveying and mapping method based on whole-process remote sensing data analysis, and the method comprises the steps: carrying out the quick calculation of the reservoir capacity of a barrier lake through employing a multi-grid discrete surface integral algorithm based on DEM remote sensing data; based on the reservoir capacity calculation result of the dammed lake, calculating the reservoir area flooding range by adopting a grid flooding algorithm, and performing graphical surveying and mapping display; introducing the longitude and latitude coordinates of the upstream residential point of the dammed lake, visually displaying the residential point on a graph, the upstream flooding disaster situation of the dammed lake under different water levels can be obtained, and decision support is provided for subsequent organization of safe evacuation of residents; and calculating and statistically analyzing the key technical parameters of the barrier lake according to a corresponding calculation formula, such as the maximum tail water length, the reservoir area submerging area and the water storage change characteristics. The defects that a traditional surveying and mapping method is limited in application condition and insufficient in timeliness are overcome, rapid surveying and mapping calculation is conducted on the upstream flooding condition of the barrier lake in the whole process based on DEM remote sensing data, and key technical information is provided for emergency rescue work of the barrier lake.

The invention relates to the field of three-dimensional measurement, and particularly relates to a multi-queue rapid phase unwrapping method and a multi-queue rapid phase unwrapping system based on a quality diagram. According to the invention, the phase unwrapping process is guided by the quality diagram, thereby effectively avoiding influences imposed on the phase unwrapping precision by noises and a low-quality region. Meanwhile, queues, whose number is equal to that of quality levels, are established so as to be used for storing nodes of each quality level, thereby avoiding a process of sequencing carried out every time when a node is added to the queues in the phase unwrapping process of a traditional flood algorithm, and greatly improving the phase unwrapping speed.

A method for improving fuel cell system reliability in the event of end cell heater failure in a fuel cell stack. The method includes detecting that an end cell heater has failed. If an end cell heater failure is detected, then the method performs one or more of setting a cooling fluid pump to a predetermined speed that drives a cooling fluid through cooling fluid flow channels in the fuel cell stack, limiting the output power of the fuel cell stack or the net power of the fuel cell system, limiting the maximum temperature of the cooling fluid flowing out of the stack, turning off stack anti-flooding algorithms that may be used to remove water from reactant gas flow channels in the stack, and turning off cathode stoichiometry adjustments for relative humidity control in response to water accumulating in cathode flow channels in the fuel cell stack.

The invention relates to a wireless sensor networks underground garage personal safety alarm system and a method. The system firstly needs to deploy a plurality of wireless sensor nodes according to the actual state of the underground garage to ensure that the wireless sensor nodes can cover the entire underground garage without blind spots and blind spots, the security sector outside of the garage needs to be installed with a remote control center to feedback unusual circumstances occurred in the garage, the garage needs to be installed with a lighting switch control receiver and a broadcast switch receiver, each wireless sensor nodes can send the instructions of starting lighting and broadcasting to the receivers. After the deployment, each wireless sensor node starts to monitor within the own perception range, once the words such as help, murder and the like or the screaming like ah is monitored, other wireless sensor nodes are waken up by using a flooding algorithm so as to form a self-organizing wireless sensor network immediately. The wireless sensor node firstly sensing the risk transmits alarm signals to the wireless sensor nodes at the entrance/exit of the garage through the network. The wireless sensor nodes continue to forward alarm information to the remote control center, after the sensor nearest to the lighting switch control receiver and the broadcast switch receiver sensor sends a start command to the receivers after completion of forwarding the alarm information, the lighting equipment and the broadcasting equipment are turn-on until the security personnel go to the scene, and the lighting equipment and the broadcasting equipment are closed after treatment, thus the wireless sensor nodes monitoring re-enters into a monitoring state.

The invention discloses a routing optimization method of a Bluetooth mesh network with a mobile node. The method comprises the following steps: when judging that a node needs to be forwarded, obtaining a forwarding probability initial value of the node according to an RSSI value in a received data packet; adjusting the forwarding probability initial value according to the neighbor node informationof the node; confirming the adjusted forwarding probability initial value according to the mobile node information of the node to obtain a forwarding probability value; and generating a random value,comparing the obtained node forwarding probability value with the generated random value, if the random value is greater than or equal to the forwarding probability value, performing forwarding operation by the node, and otherwise, not performing forwarding by the node. An original flooding algorithm is improved, and a novel routing method is provided. Redundant forwarding of the nodes in the Bluetooth mesh network is limited by dynamically adjusting the forwarding probability values of the nodes, so that the problems of network delay and data packet loss caused by mobile nodes are solved.

A system for generating an automatically segmented and annotated two-dimensional (2D) map of an environment includes processors coupled to a scanner to convert a 2D map from the scanner into a 2D image. Further, a mapping system categorizes a first set of pixels from the image into one of room-inside, room-outside, and noise by applying a trained neural network to the image. The mapping system further categorizes a first subset of pixels from the first set of pixels based on a room type if the first subset of pixels is categorized as room-inside. The mapping system also determines the room type of a second subset of pixels from the first set of pixels based on the first subset of pixels by using a flooding algorithm. The mapping system further annotates a portion of the 2D map to identify the room type based on the pixels corresponding to the portion.

The invention discloses a method of quickly positioning a Uyghur character in a complex background image. The method comprises steps: a stroke key point is detected from an image based on a detectiontemplate; in combination of the detected stroke key point and a flooding algorithm, a character assembly in the image is extracted; based on similarities of the character assembly, assembly clusteringis carried out to realize construction of a character line; and by using a line classifier formed by an HOG+SVM system, HOG feature extraction on the character line and binary classification of a character line and a non-character line are carried out. The method can enhance the speed and the precision of positioning the Uyghur character in the complex background image.