40 results about "Initial topology" patented technology

A system and method that does trustworthy multi-objective structural synthesis of analog circuits, and extracts expert analog circuit knowledge from the resulting tradeoffs. The system defines a space of thousands of possible topologies via a hierarchically organized combination of designer-trusted analog building blocks, the resulting topologies are guaranteed trustworthy. The system can perform a search based on a multi-objective evolutionary algorithm that uses an age-layered population structure to balance exploration vs. exploitation, with operators that make the search space a hybrid between vector-based and tree-based representations. A scheme employing average ranking on Pareto fronts is used to handle a high number of objectives. Good initial topology sizings are quickly generated via multi-gate constraint satisfaction. To explicitly capture expert analog design knowledge, data mining is employed on the sized circuits to: automatically generate a decision tree for navigating from performance specifications to topology choice, to do global nonlinear sensitivity analysis, and to generate analytical models of performance tradeoffs.

A method for designing an optimal wiring topology for electromigration avoidance is disclosed. The wiring topology includes multiple sources, multiple sinks and multiple wires. The method includes the following steps: A feasible wire, a wire of the shortest length connecting each pair of source and sink, is calculated, and the capacity of each feasible wire is decided. An initial feasible topology is found. A flow network is created based on the initial topology. Negative cycles are iteratively checked and removed until no more negative cycles.

The invention proposes a power restoration method based on network equivalence and parallelization, which includes the steps: off-line calculating, pre-storing of data, establishing of a power grid's initial topology structure, generating of an offline equivalent source point table of a first-level feeder X, parallel computing of real-time support capabilities and restoring of power. The method is suitable for solving the problem of power restoration in smart distribution networks with various types of adjustable flexible sources. In the face of varying degrees of power loss, the method of the present invention can quickly find safe and reliable power restoration programs so that various types of support resources in the smart distribution networks can be utilized reasonably and effectively. In addition, the economy of the operating programs is also considered. Therefore, an optimal program can be selected for the quick restoration of power.

The invention provides a simulation method of a full-loaded body of an amphibious vehicle. The method defines different objective functions by using a typical method, and the full-loaded body system calculated by the optimization process of the algorithm; including the setting of multiple objectives in structural topology optimization, multiple The determination of the target evaluation method, the determination of the structural topology optimization simulation method, and the body structure design based on the optimization results are four necessary design links. The results of the target topology optimization determine the optimal topology of the product. The simulation method of the present invention largely ensures that the size and shape of the design of the amphibious vehicle body structure are carried out under the optimal initial topology form of material distribution, and can greatly improve the utilization rate of materials to determine the optimum load-bearing structural parts of the vehicle body. At the same time, the layout can greatly save design time, and can significantly improve the structural optimization level of the high-speed amphibious vehicle, thereby ensuring the fast, reliable and stable working state of the amphibious vehicle.

The invention relates to the novel technical field of a wireless sensor and actuator network, in particular to a power-adjustable zonal sensor network topology control method. The method is characterized by sequentially comprising the following steps: 1) an information collecting stage: a sensor sink center node which is arranged in a zonal region initiates a collecting command to a plurality of sensor network nodes which are arranged in the zonal region from the near to the distant, and the sensor nodes obtain an information channel quality parameter which is communicated with a plurality of neighbor nodes to obtain an initial topology connection diagram; 2) a topology optimizing stage: each sensor network node computes the connection priority with each neighbor node in a distributing way to obtain a topology optimizing parameter and confirm an optimization route of the nodes for transmitting a data packet; and 3) a transmitting power control stage: each node controls the powder from the near to the distant at the beginning of the sink node according to the topology optimizing parameter obtained in the topology optimizing stage, so that the interference among the communication is reduced, and the energy consumption is reduced.

The invention discloses a method for establishing a wireless sensor network with small world and scale-free properties for mainly solving the problems of low energy efficiency and poor survivability of the sensor network. A realizing process comprises the following steps of: deploying the sensor network randomly, and adding super nodes according to a set ratio, wherein all the nodes broadcast andacquire neighbor information; generating small-scale initial topology randomly and selecting to add new nodes; calculating a connection probability between the new nodes and the nodes in the topologyin a distributed way according to the different node types by taking various attributes of the wireless sensor nodes into comprehensive consideration; and connecting the new nodes with the current topology randomly according to the probability, and repeating the process until all the nodes are added into the topology. The method has the advantages of high efficiency, strong practicability and survivability. The wireless sensor network topology generated by the method shows the small world and scale-free properties simultaneously, has the advantages of improving the network communication quality and the network service life, and is suitable for the construction of the sensor network having higher requirement for the energy efficiency and the survivability.

The topology optimization method of the internal and external rib structure of the gear transmission box of the present invention includes: establishing the initial topology model of the internal and external rib structure of the gear transmission box; determining the optimization area of ​​the initial topology model; determining the member characteristics and processing of the initial topology model direction; determine the displacement characteristics of the initial topology model; perform topology optimization of the initial topology model according to the optimization area, member characteristics, processing direction and displacement characteristics, and gradually establish the finite element model of the container entity. The adaptability of the structural rigidity and resonance strength of the box to different working conditions is guaranteed. And there is no significant increase in structural weight.

The invention discloses a wireless sensor network fault-tolerant topology establishment method. The method comprises the following steps of S1, in a topology initialization phase, finishing initialization work by each node; S2, selecting the lowest and second lowest energy paths and determining a new transmission radius according to the distance between the node and an adjacent node in the lowest and second lowest energy paths; and S3, adjusting node transmitting power and forming an energy consumption effective fault-tolerant topology. According to the method, the fault tolerance and the energy effectivity of the topology are taken into consideration, when the topology is established, the lowest and second lowest energy paths are established between any two adjacent nodes selected from an initial topology, then the node transmitting power is adjusted, it is ensured that two disjoint paths exist between the nodes, and the energy is effective.