584 results about "Branch node" patented technology

The invention discloses a block chain network, a branch node and a block chain network application method. The block chain network comprises a plurality of nodes used for separately storing blocks comprising recorded data and linking the blocks to form a block chain; the plurality of nodes comprise at least one branch node used for: when recorded data submitted by a specific user are received, sending the recorded data to other nodes in the block chain network, and returning a recorded data submission result to the specific user according to the number of effective confirmation results returned by other nodes for the recorded data; and the branch node is further used for: when a request of creating a new block of the specific user is received, sending the new block to the other nodes in the block chain network, and returning a result of creating the new block to the specific user according to verification results of the other nodes to the new block. By implementation of the block chain network disclosed by the invention, the implementation of the block chain technology on a mobile terminal of a user side is achieved, the application range of the block chain is expanded, and the resources of the mobile terminal of the user side can be saved.

A method for creating multiple branch wells from a parent well is disclosed. A multiple branching sub is provided for placement at a branching node of a well. Such sub includes a branching chamber and a plurality of branching outlet members. The outlet members during construction of the branching sub, have previously been distorted into oblong shapes so that all of the branching outlet members fit within an imaginary cylinder which is coaxial with and substantially the same radius as the branching chamber. After deployment of the branching sub via a parent casing in the well, a forming tool is lowered to the interior of the sub. The outlet members are extended outwardly by the forming tool and simultaneously formed into substantially round tubes. Next, each outlet member is plugged with cement, after which each branch well is drilled through a respective outlet member. If desired, each branch may be lined with casing and sealed to a branching outlet by means of a casing hanger. A manifold placed in the branching chamber controls the production of each branch well to the parent well.

An aggregate index is used for accessing an aggregate value associated with one or more rows of a database table. The aggregate values are stored in the index entries of the index, thus allowing determination of aggregate values without accessing the underlying database table. The aggregate index is created by determining an aggregate value associated with an index entry, and storing the aggregate value with the index entry. The aggregate value is determined by accessing information corresponding to the index entry and processing the information. In the case of an index entry in the form of a branch node, the information might be aggregate values from other nodes, or values of items in the database pointed to by the index entries that are leaf nodes. The aggregate values may be stored in index entries of any type of index.

A method for reading and tracking radio frequency identification (RFID) tags in the presence of a noisy air channel is provided. In accordance with the method, a binary tree data structure is used to characterize a plurality of RFID tags, each of which is associated with a unique identification (ID) number. During communication between a tag reader and one or more RFID tags, the tag reader traverses the binary tree, eliminating tags from communication until one tag with a unique ID number is isolated and verified. As the binary tree is traversed, counters associated with each node in the tree are incremented based on tag matches, such that, over time, counters associated with nodes in tag-populated branches will tend to have a high value and counters associated with nodes in unpopulated tree branches will tend to have low values. Where the read process is subject to noise and the tag reader is forced make a decision at a branching node, the tag reader makes a branch prediction based on the current value of the node counters associated with each of the possible alternative branches.

Apparatus, systems, and methods operate to obtain data from a first array constructed from a directed acyclic graph formed as a prefix tree having key strings associated with a plurality of interconnected nodes, including branch nodes coupled via branches to sibling nodes and child nodes. Reference numbers are assigned to nodes in a monotonic progression as the prefix tree is traversed along the plurality of nodes. Sibling nodes are assigned reference numbers before child nodes, and child nodes are assigned reference numbers according to the order of appearance of key string characters. The first array comprises the key strings ordered according to the reference numbers. A second array can be formed as a linear searchable index derived from data in the first array, with elements of the second array comprising the reference numbers. Additional apparatus, systems, and methods are disclosed.

The invention provides an MPTC account state tree and a fast retrieval method of an MPTC block-chain. The MPTC account state tree includes a root node, branch nodes, an expansion node and transactionchains. The state tree has the following advantages that on the basis of an account model, a user can reference all data associated with an account, and management of data assets is facilitated; an account code-based retrieval method of the MPTC tree is adopted, and efficiency of transaction retrieval is greatly optimized; and transaction chain pointers are introduced into the account state tree,the history transaction pointers Pre-hash serially connect transactions together, and the complete and ordered transaction chains which are under account codes and include all the history transactionscan be acquired.

Centralized coordination of setting and adjusting trip settings of electronic circuit breakers in an electrical distribution system by monitoring short circuit current availability (SCCA) and adjusting trip settings based on received SCCA estimates from SCCA monitoring devices installed at main, feeder, and branch nodes of the distribution system. The SCCA monitoring devices are capable of automatically estimating the SCCA in the circuit or node at which the SCCA device is installed and transmitting SCCA estimates to a controller, which uses the SCCA estimates to coordinate adjustments to trip settings for the various circuit breakers. Depending on the node position of the circuit breaker and the corresponding SCCA at that node, the controller adjusts in real-time the short-circuit trip settings for the circuit breakers so that they are below the SCCA value. Optional user-inputted settings can affect the trip setting adjustments, such as transient loading conditions that can influence the SCCA estimates.

The invention provides a visual relay protection setting calculation system and method, and relates to the field of relay protection. According to the using characteristics of power consumers, the visual setting calculation system integrated multiple functions is developed and comprises a man-machine interaction interface module, a calculation module, a data management module and a report generation module. The visual relay protection setting calculation method comprises the steps that drawing of a geographical wiring diagram is finished, a network topology structure is formed by the geographical wiring diagram, node numbering and branch node numbering are automatically finished according to the geographical wiring diagram, and short-circuit calculation is carried out by calling essential data; a setting calculation principle and a formula are stored in the calculation module, stand-by data are formed according to the setting calculation principle, system setting calculation data are formed by the stand-by data and the essential data, and the system gives an alarm when a protection constant value is larger than a set threshold value; finally, a report is generated by calculation results to be output. According to the visual relay protection setting calculation method, short-circuit calculation results are directly called in a setting calculation part, the calculation time can be saved, the report can be singly generated by the calculation data of each module, and subsequent analyzing and processing can be conveniently achieved.

An apparatus, system, and method are disclosed for optimization of XPath expressions in a database management system configured to accept XML queries. Operations of the method include receiving an XQuery representation and partitioning XPath expressions within the XQuery representation into a plurality of XPath expression clusters. The XPath expression clusters may comprise one or more XPath expressions and those in each cluster may operate on a common document. Furthermore, the XPath expressions in each cluster are hierarchically related to each other such that branch nodes of the cluster are executable independent of nodes in other XPath expression clusters. The method also defines merging the one or more XPath expressions into one or more expression trees for each XPath expression cluster. The method generates one or more query execution plans from the one or more XPath expression blocks. The method includes, for each query execution plan, splitting each of the XPath expression blocks into one or more ordered fragments. The method determines a cardinality according to database statistics and an execution cost for each XPath expression block within each query execution plan. Finally, the method determines an aggregate cardinality for each query execution plan and an aggregate execution cost for each query execution plan. Therefore, an XQuery may be optimized at both the global XQuery and local XPath expression block level, improving performance and reducing overhead.

The invention relates to the technical field of electric power system operation and control and discloses an electric power system dynamic state estimation method based on a synchronous phase-angle measuring device. According to the technical scheme, the method comprises the steps of A, reading current network parameters of an electric power system and a network topological structure of the electric power system, and therefore forming a node admittance matrix and a branch-node incidence matrix; B, establishing an equivalent circuit according to the network topological structure of the electric power system, and configuring a measurement function of the electric power system and a PMU of the electric power system, wherein the measurement of the system comprises node voltage amplitude measurement, node current amplitude measurement, node power injection measurement and node load flow measurement; C, conducting dynamic state estimation on the system on the basis of extended Kalman filtering; D, judging conditions of convergence. According to the electric power system dynamic state estimation method based on the synchronous phase-angle measuring device, due to the introduction of the PMU, real-time and accurate measurement information such as the voltage and the phase angel can be supplied to the system, the higher measurement redundancy rate of the system is obtained, and therefore the precision of the state estimation is improved. The electric power system dynamic state estimation method based on the synchronous phase-angle measuring device has the advantages of being good in robustness, high in state estimation precision and good in convergence performance.

The system includes a main node, several branch nodes and network connecting the main node with the said branch nodes. The main node is a center for controlling synchronization operation. The main server includes a main data server, a main FTP server and an application program server. A synchronization control module in the application program server is utilized to control data transmission between main FTP server and branch FTP server in branch node, as well as to update file digest information of database server in main node. Branch node in the system includes at least one branch database server and a branch FTP server. Running synchronization program in application program server at main server makes file synchronization operation separate from branch node so as to expand branch node easily.

An inverse query engine that uses an instruction tree to represents the queries to be applied against input, instead of applying each query individually. Each node in the instruction tree represents executable code. Each branch of the instruction tree when executed from the root node to a terminating branch node represents the instructions to be executed to process that query against the input. The instruction tree is forward-only in that once a node in a tree is processed against an input, that executable code associated with that node is not ever processed again for that node. Accordingly, processing resources and time is conserved.

A decision tree for classifying computer files is constructed. Computational complexities of a set of candidate attributes are determined. A set of attribute vectors are created for a set of training files with known classification. A node is created to represent the set. A weighted impurity reduction score is calculated for each candidate attribute based on the computational complexity of the attribute. If a stopping criterion is satisfied then the node is set as a leaf node. Otherwise the node is set as a branch node and the attribute with the highest weighted impurity reduction score is selected as the splitting attribute for the branch node. The set of attribute vectors are split into subsets based on their attribute values of the splitting attribute. The above process is repeated for each subset. The tree is then pruned based on the computational complexities of the splitting attributes.

The invention discloses a HTTP (Hyper Text Transport Protocol) tunnel detection method based on decision tree classification algorithm, used for solving the technical problem of poor stability of a conventional tunnel detection method based on the transport layer packet statistic characteristic analysis. In the technical scheme of the invention, an HTTP data stream and a tunnel data stream are used to train a decision tree classification model, with lower requirement on quantity of training sets than a statistic fingerprint method; secondly, compared with the statistic fingerprint method in which only two flow characteristics can be utilized, the decision tree classification method can use more characteristics to train the model, therefore, obtained classification rules are more precise and stable; the process to train the model is relatively simple, does not involve image fingerprint consumes less internal storage; finally, the judgment of the decision tree classification method is made according to attributes on a plurality of branch nodes without depending on one specific critical value, which achieving better stability.

The embodiment of the invention discloses a method for establishing a backup label switching path, and a method, a node and a system for protection and rearrangement of a fault. The method for establishing a backup label switching path comprises the following steps: receiving a command for establishing a backup label switching path; judging whether the node is a branch node unrelated to the fault or not, if the node is a branch node unrelated to the fault, binding an operating path and a backup path on the upper stream and the lower stream. By using the operating path unrelated to the fault, the superposition of the backup path and the operating path is avoided, the resource waste caused by a loop formed by the backup path and the operating path is avoided, and network resources and label resources are saved. A service message is sent to the superposed part of the backup path and the operating path to prevent the repeated sending of the service message, bandwidth resources are saved, and thus, effective multicast LSP protection is achieved by using least resources.

The invention discloses a method for realizing IPv6 fast route lookup. The data structure of a multibit tree is used to store a route table, then a compression method is used to compress a repeated key and an empty key generated by prefix expansion in a table in a branch node, and a mapping is made by using key index values before and after the compression. According to the method, on the basis of not increasing memory occupation, the adding, lookup and deletion speeds of an IPv6 route can be raised by multiple times.

Every time a packet is received from a server, a communication performance measuring equipment transmits/receives a predetermined control packet to/from a client and a branching node, respectively, thereby collecting information about communication environment. Based on the information and a predetermined delay model, a delay time in delivering the same packet from the server to the client is estimated, and, according to the delay time, transmission timing of an acknowledge packet in response to the received packet is controlled. Thus, it is possible to accurately measure communication performance between an arbitrary client and an arbitrary server, no matter where the communication performance measuring equipment is physically arranged.

The invention provides a method for realizing multicast in a PBB_VPLS network, comprising the following steps of: releasing a binding relationship between a VPLS instance and a multicast tree to other found PEs by a root node PE and building the root node PE and sub-nodes and other relevant PEs as a multicast tree for receiving leaf nodes; and forwarding a multicast message according to the multicast tree after the root node receives the multicast message. by the method, the multicast message is distributed according to a typical tree-shaped structure and the copy step of the multicast message can be currently finished by an entrance PE and undertaken by a branch node P in the multicast tree, thereby saving plenty of wideband waste caused by multicast copy and improving the utilization rate of a multicast wideband.

The invention provides an antenna module and an electric device. The wireless module includes a metal frame and a feed coupling branch node. A predetermined distance is arranged between the long edge of the feed coupling branch node and the inner side edge of the metal frame. The feed coupling branch node and a middle frame are arranged in parallel between a display module and a main board of the electric device. A first end of the feed coupling branch node adjacent to a breakage seam is electrically connected with a grounded part of the main board, so that a first grounded point of the antenna module is formed. A contact point is arranged on the feed coupling branch node and the feed coupling branch node is connected with a radio frequency module of the main board electrically, so that a feed point of the antenna module is formed. The middle frame adjacent to a second end of the feed of the feed coupling branch node is connected with a part, so that a second grounded point of the antenna module is formed. A gap is arranged between the side edge of the metal frame and a side edge above the feed coupling branch node and corresponding to a location of the display module. By adopting the antenna module, the antenna performance of the device can be improved and the appearance of the electric device can be improved.

The invention discloses a static defect detection method of an application program slicing technology, which comprises the following steps of: A, acquiring defect characteristics of a defect mode to be detected; B, calculating path conditions of all branch nodes according to the defect characteristics, and generating slicing criteria; C, traversing a control flow graph according to the slicing criteria to perform program slicing, and reconstructing the control flow graph to obtain a reconstructed control flow graph; D, performing defect mode state machine calculation by using the reconstructed control flow graph and using a defect state iterative algorithm; E, if the current control flow graph node is a non-convergence node, converging and updating the state conditions in all defect states; and F, if the current control flow graph node is a convergence node, merging the states according to the state condition of the current defect state. By adopting the method, the defect detection efficiency can be improved to certain degree, and misinformation of a path merging strategy-based path sensitivity detection method is reduced.

The invention discloses a fine line loss analysis system, which comprises an intelligent line loss analysis host module and a plurality of monitoring modules connected to the intelligent line loss analysis host module. The monitoring modules are respectively arranged at a side of a distribution transformer of a station area, branch nodes of each low-voltage branch line, and the side of each user meter box. The monitoring modules are used for separately monitoring the distribution transformer side, the branch nodes of each low-voltage branch line, the metering data of each user meter box, and the metering data of each branch household meter in each user meter box. The intelligent line loss analysis host module collects the total area data of the station area and the measurement data monitored by each monitoring module in real time, and compares the received measurement data according to a hierarchical structure of a distribution network of the station area to obtain and output the lineloss analysis result. According to the fine line loss analysis system, the fine line loss analysis of the station area can be realized. The method has advantages of simple realization, low cost, highprecision, stability and reliability, and the like.

The invention discloses a hybrid measurement based power distribution network dynamic state estimation method, which comprises the steps of reading current network parameters and a network topology structure of a power distribution network, and forming a node admittance matrix and a branch-node association matrix; reading SCADA data and PMU data of each node of the power distribution network, configuring a mapping relation between the two kinds of data, and processing differences between the two kinds of data; building a state transition equation and a measurement equation which are adapt to PMU/SCADA hybrid measurement; adding a fault-tolerant mechanism to a traditional extended Kalman filter method, and performing state estimation on the power distribution network by adopting the improved extended Kalman filter method. Dynamic state estimation is applied to hybrid measurement, and the accuracy of state estimation is improved. Meanwhile, an adaptive data detection mechanism is introduced, and the accuracy of dynamic state estimation is improved.