106 results about "Topology design" patented technology

Deterministically doped field-effect devices and methods of making same. One or more dopant atoms, also referred to as impurities or impurity atoms, are arranged in the channel region of a device in engineered arrays. Component atoms of an engineered array are substantially fixed by controlled placement in order to provide a barrier topology designed to control of source-drain carrier flow to realize an ultra-small device with appropriate, consistent performance characteristics. Devices can be made by placing atoms using proximity probe manipulation, ion implantation, by facilitating self-assembly of the atoms as necessary, or other techniques. These atomic placement techniques are combined in example embodiments with traditional methods of forming a substrate, insulators, gates, and any other structural elements needed in order to produce practical field-effect devices.

A method of designing a telecommunications network, the method comprising the steps of A) for all working demand flows required to be routed in the telecommunications network, finding an initial topology of spans between nodes in the telecommunications network that is sufficient for routing all working demand flows, while attempting to minimize the cost of providing the spans; B) given the initial topology of spans identified in step A, finding a set of additional spans that ensures restorability of working demand flows that are required to be restored in case of failure of any span in the initial topology of spans, while attempting to minimize the cost of providing additional spans; and C) starting with the initial topology of spans and the additional spans identified in step B, finding a final topology of spans between nodes in the telecommunications network that attempts to minimize the total cost of the final topology of spans, while routing all working demand flows and ensuring restorability of working demand flows required to be restored in case of failure of any span in the final topology of spans. A network so designed may be implemented in whole or in part.

Embodiments of the present invention provide a method and system for designing a test network in an integrated application, and configuring remote network devices through a network design application to test a network design. One embodiment of the present claimed subject matter is provided as a system for automatically configuring remote network devices to simulate a network connection. The system includes a plurality of computing devices which are physically coupled to one or more network devices, wherein the network devices are automatically configured to comprise a test network corresponding to a remote test network topology design.

A topology design information generator which, based on design information storing setting information, which is set in each communication instrument in order to enable the communication, on a layer-by-layer basis, generates layer-by-layer topology design information of the network. A topology information generator which collects the layer-by-layer setting information actually set in each communication instrument and, based on the collected setting information, generates layer-by-layer topology information of the actually constructed network. And a topology information comparator which compares the topology design information generated by the topology design information generator, and the topology information generated by the topology information generator, on the layer-by-layer basis.

A method of designing a network for an Internet Service Provider (ISP) is taught. The ISP provides routers that handle predetermined traffic demands and that are connected by links. An ordered sequence of (source-destination) pairs of routers is obtained. A particular (source-destination) pair and a minimum capacity on each potential link for the predicted traffic demands on the selected (source-destination) pair are selected. The differential cost of the link is then found, followed by a determination of the least-cost path for the selected (source-destination) pair. The current capacity and current cost of the network are then updated. The process repeats for all (source-destination) pairs in the ordered sequence. Least-cost paths can be determined using the Bellman-Ford method. The output of the basic method can be further refined by the Link Removal Heuristic (LRH) method, and / or a Flow Removal Heuristic (FRH) method.

Provided is the utilization of face panels (20) containing core materials (16) topologically structured at small scale, relative to a system (e.g. ship hull) that utilize them. They are optimized Lo absorb or reflect the energy subject to their while also possessing the ability to efficiently support high structural loads. It is entirely compatible with double-hull ship design concepts, because the volume between the hulls is used to locate the energy absorbing material substructures. The approach can be generalized to provide protection from impacts of low, intermediate or high intensity. The technology to design such structures requires materials selection and cell topology designs coupled with and techniques for the affordable manufacturing of structures that must he able to sustain severe dynamic deformations. It requires a coupling of effects occurring and phenomena that occur at the materials and structural levels.

The invention provides a topology design method and a topology design device of a current collecting system of an offshore wind farm. The topology design method comprises the following steps of: generating topological structures meeting the constraint conditions according to input information of a user and various constraint conditions; carrying out load flow calculation on the generated topological structures, obtaining line current values on all the topological structures, and selecting the types of cables and switches of corresponding lines; calculating the economy cost of all the topological structures according to the investment cost and the maintenance cost of the cables and switches selected; calculating the reliability cost of all the topological structures according to the fault occurrence probability of the selected cables and switches; and carrying out sequencing on all the topological structures according to the economy cost and the reliability cost or simultaneous consideration of the comprehensive cost of the economy cost and the reliability cost, and selecting the topological structures with preset quantity for output. The topology design method and the topology design device have the advantages that automatic design of the topological structures of the current collecting system of the offshore wind farm is realized by a computer, so that the investment on labor, cost and time is greatly saved.

The invention discloses a harmonic modal analysis method for an offshore wind farm. The method comprises the steps of 1) building a system harmonic model according to an offshore wind farm system, namely a connection relationship between each component and a cable; 2) establishing a network admittance matrix of the system according to the system harmonic model, solving a modal impedance frequency spectrum of the system by utilizing a modal method, calculating a participation factor of each node, and determining a real occurrence position of harmonic vibration; 3) assessing the sensitivity of electric parameters of components of the system; and 4) assessing the sensitivity of design parameters of the system. According to the method, an equivalent model is built according to the parameter of each component of the wind farm, the harmonic performance of the system under different topological parameters, cable parameters, transformer parameters and other parameters is studied by applying the modal analysis method, and the topological design and component model selection of the wind farm can be optimized.

The invention discloses a material breakage constraint-based continuum structure topology design modeling and optimization design method, which is used for solving (a) problems of stress concentration and singularity, and (b) a problem of maximum stress fluctuation and a problem of high analyzed and calculated quantity in different degrees in the prior art. In the method, effective stress constraint relaxation is adopted to treat the phenomenon of stress singularity. In the process of optimizing problem approximation modeling, a q1 norm metrical function of the structural stress serves as a penalty function, all unit stress constraints are replaced by q2 norm metrical function constraint of the structural stress, the most potential active unit stress constraints and the introduced volume constraints, and the local stress level is controlled by combining variable constraint limit. The optimization process of the method is divided into two optimization stages and a conversion stage, and the design space is automatically expanded and reduced. A quadratic programming method is utilized to solve each stage, a pure optimized structural topology in black / white distribution can be obtained, and the method has high optimization design efficiency.

The invention provides a direct current micro grid topology design method based on DC-DC (Direct Current-Direct Current) sectionalizers and belongs to the technical field of micro grid. In an annular direct current micro grid topology, a plurality of direct current micro grid sectionalizers based on high frequency isolation DC / DC conversion (short for DC-DC sectionalizers) are arranged for replacing solid circuit breakers. A direct current micro grid wire frame is of an annular structure, and an annular busbar is divided into a plurality of segments and a plurality of voltage levels. Adjacent busbar segments are connected through the DC-DC sectionalizers or circuit breakers so as to form a power supply layout with multiple segmentations and multiple connections. The DC-DC sectionalizers are of a dual full bridge topology structure, and are subjected to alternating current coupling through high-frequency transformers. The direct current micro grid topology design method has the advantages that on the aspects such as electric isolation, power flow control and connection among busbars with different voltage levels, the method has obvious superiority, the response speed is rapid and the sensitivity is high. When a direct current busbar or device has a fault, the DC-DC sectionalizers are not affected by capacitance instantaneous discharge, the faulted busbar is isolated, the power failure range is reduced as far as possible, and the reliability of the system is improved.

The invention relates to a 5G network slice topology design and reliable mapping method for bottom node failure, belonging to the technical field of mobile communication. The method comprises the following steps: a 5G network slice reliable mapping model is established; the virtual network operator VNO periodically detects the resource and reliability information of the bottom node; According to the overall reliability requirements of network slices, the reliability objectives of a single virtual network function instance are obtained. According to the real-time node information, the mapping scheme of the slice is judged. If there are resource constraints and the reliability of a single node can not meet the requirements, the network slice must be reconstructed. If both resource and reliability meet the requirements, the optimal mapping scheme is determined according to the criterion of minimizing bandwidth resource consumption while minimizing the difference between the required reliability and the achievable reliability. Otherwise, the slice request is rejected directly. When the invention realizes the reliable mapping of the network slice, the cost of the operator is reduced atthe same time of the user experience.

The invention discloses a structural topology-shape combined optimization method based on a multi-arc-section curve under pressure load, and the structural topology-shape combined optimization method based on the multi-arc-section curve under pressure load is used for solving the technical problem that an existing structural topology-shape collaborative optimization method under pressure load is poor in practicality. According to the technical scheme, a NURBS spline interpolation value is adopted to describe the pressure load action boundary curve section, NURBS curve controlling points are shape design variables independent of the topological design variables; structural topology-shape combined optimization is conducted; after the optimization is conducted, the outline boundary needed to be machined and manufactured in a numerical-controlling mode is replaced by the multi-arc-section curve, and fine shape optimization is conducted on the outline of the multi-arc-section curve. The structural topology-shape combined optimization method based on the multi-arc-section curve under pressure load can carry out topology-shape combined optimization in the pressure load working condition, enables the outline of the optimized structure to be a multi-arc-section outline, is suitable for the numerical-control machining manufacturing technology, and is strong in practicality.

The invention provides a dual-rotor axial disk-type permanent magnet motor. A dual-motor and intermediate stator mode is adopted in structural layout, and magnetic flow is axial in direction; dual rotors output rotation speed and torque through a rotating shaft connected with the dual rotors, and permanent magnets arrayed in a trapezoid halbach form are arranged on inner sides of the rotors. The motor stator is designed in a non-yoke structure and adopts a multi-tooth combination and is fixed on a main case; the main case is in topology design, vent holes are arranged in the surface of the main case, and passive heat dissipation of the motor is facilitated; the dual-rotor axial disk-type permanent magnet motor has the advantages of small size, light weight and high power-to-weight ratio and is applicable to equipment of electric and hybrid cars, aircrafts and the like. The invention further relates to a non-rotor core structure design, and the power-to-weight ratio of the motor is further increased.

The invention provides a zero-current soft switching converter and relates to the field of power electronic circuit topology design. The zero-current soft switching converter comprises a switching tube, a power diode, a voltage source inductor basic circuit and a current source inductor basic circuit, and further comprises a soft switching auxiliary unit. The soft switching auxiliary unit comprises a resonance inductor, a resonance capacitor and an auxiliary switching tube. The switching tube and the auxiliary switching tube are turn-off power switching devices provided with antiparallel diodes or having antiparallel diode characteristics. One end a of the resonance inductor is connected to a connection point of the switching tube and the power diode, and the other end b of the resonance inductor is connected to a current source inductor. The resonance capacitor and the auxiliary switching tube form a serial branch, one end of the serial branch is connected with an end b of the resonance inductor, and the other end c of the serial branch is connected to the negative pole N or the positive pole P or the middle point M of a voltage source. According to the zero-current soft switching converter, resonance current amplitude values of the soft switching converter can be automatically changed along with load current, therefore, loss of the soft switching converter can be further lowered, and efficiency can be further improved.

The invention discloses a structure topology optimization method based on material field reduction series expansion, and solves the problem of low calculation efficiency caused by too many design variables and need of relative density or sensitivity filtering measures in traditional density method topology optimization. The method comprises the following steps: a bounded material field consideringcorrelation is defined; a spectral decomposition method is adopted to perform transform to obtain a linear combination of a series of undetermined coefficients, the undetermined coefficients are usedas design variables, an optimization model is constructed based on a unit density interpolation model, a gradient class or non-gradient class optimization algorithm is adopted to solve a topologicaloptimization problem, and then a topological configuration with a clear boundary is obtained efficiently. According to the method, the number of design variables in density method topology optimization can be greatly reduced, and meanwhile, the method has the natural advantage of completely avoiding grid dependence and chessboard format problems. The method also inherits the advantages of simple density method form, convenience in engineering popularization and the like, the optimization solving speed is high, and the research and development efficiency of the innovative topological design ofthe complex equipment structure can be ensured.

The invention provides a high reliability control method and a high reliability control system in a multi-robot system. The method comprises steps of robot topology design, fault prediction design and fault recovery design, wherein for the step of robot topology design, robot topology comprises a work group formed by work robots and a standby work group formed by standby robots, positions of the standby robots and the work robots are replaceable, for the step of fault prediction design, in combination with health statues of the robots in the system, fault prediction for the work robots is carried out by utilizing a Markov model predication method; for the step of fault recovery, when a work robot is in fault, a standby robot is controlled to replace the fault work robot. As is shown in a result of a simulation system, device processing production tasks can be smoothly and cooperatively accomplished under the no-fault condition or under the fault condition, the work robot in fault can be replaced by the standby robot to accomplish operation in the system, and thereby seamless joint for device processing production can be realized.

The invention discloses a constant-current and constant-frequency inductively coupled transmission system and a design method thereof. The system comprises a direct current power supply, a high-frequency inverter, a primary reactive compensation mechanism, a mutual inductance coupling mechanism, a secondary reactive compensation mechanism, a rectifier and filter device and a variable load. The constant-current and constant-frequency inductively coupled transmission system is characterized in that wireless transmission of primary and secondary electric energy is achieved through the mutual inductance coupling mechanism; high-frequency sine alternating current which is picked up by the primary side of the mutual inductance coupling mechanism is rectified and filtered through the rectifier and filter device; the output current is constant; the whole system works in a complete resonant state and does not change along with change of the load; and the power supply requirements of the current-type variable load are met. The constant-current and constant-frequency inductively coupled transmission system has the significant effects that through certain topology designs of primary and secondary reactive compensation mechanisms and a system parameter design, constant outputs of the load current and the primary resonance current of the system under a variable load condition are achieved; the stability of the working frequency of the system is ensured; and the system is simple in overall structure and safe and reliable to work.

The invention discloses a topological optimization method of a load-controllable transfer structure and aims at solving the technical problem of poor practicability of an existing topological optimization method. According to the technical scheme, a topological optimization model is established firstly, a topological design area is defined as Omega1, rod units jointly form an area Omega2; secondly, rod unit displacement constraint values ui are calculated according to displacement response uOmega of a finite element analysis and computation structure; then, the sensitivity of node displacement to the pseudo density Etae of units in the design area is calculated; finally, displacement constraints of upper-portion nodes of the rod units are introduced in the optimization process, optimization is performed according to the obtained sensitivity, and optimization iteration is performed to obtain results. The topological optimization method converts constraint node load into constraint node displacement by adding auxiliary rod units, achieves controllable load transfer through the constraint node displacement, facilitates optimization constraint modeling and rapid model change and has higher flexibility, universality and accuracy.

The invention discloses a microwave and millimeter wave wideband 5bit singlechip integrated digital phase shifter. The phase shifter is formed by the cascade of 11.25-degree, 22.5-degree, 45-degree, 90-degree and 180-degree phase shift circuits; high / low-pass filter topology is adopted in a 11.25-degree / 22.5-degree phase shift position; reflective topology design is adopted in 45-degree / 90-degree / 180-degree phase shift position; and the phase shifter totally can realize 32 phase shift states in a phase shift stepping value range of 0 to 360 degrees, the finally layout is arranged by the phase shifts from big to small, and the working frequency band of the phase shifter is 6 to 18GHz. The phase shifter has simple circuit topology and design process, simple manufacturing process, high yield, small chip area, wide working frequency band, low insertion loss, high phase shift precision, low input and outlet voltage standing wave ratio and small insertion loss difference of the phase shift states.

The invention is suitable for the technical field of electric power, and provides a modular multilevel converter, a fault ride-through method and electronic equipment. The modular multilevel converter is of a three-phase topological structure, the topological structures of all phases are the same, and each phase topology comprises an upper bridge arm, a common bridge arm, a lower bridge arm and a bridge arm change-over switch; the upper bridge arm, the common bridge arm and the lower bridge arm are sequentially connected in series, each phase topology of the modular multilevel converter is designed to be of a bridge arm multiplexing structure, the use number of sub-modules in the bridge arms can be reduced, and the size and cost of the modular multilevel converter are reduced; meanwhile, a certain proportion of full-bridge sub-modules are connected in series in the upper and lower bridge arms or the common bridge arm to form an FHF type topological structure or an HFH type topological structure, and the modular multilevel converter is also ensured to have good fault ride-through capability.

The invention relates to a microgrid distributed communication topology design method based on graph theory connectivity, and the method comprises the steps: selecting candidate topological structureswith communication connectivity in a microgrid; obtaining algebraic connectivity, delay margin and communication cost corresponding to each candidate topological structure; obtaining performance index of each candidate topological structure, and selecting the optimal distributed communication topological structure corresponding to the maximum performance index; finally establishing distributed secondary voltage control of the microgrid based on the optimal distributed communication topological structure of the microgrid, and achieving reactive power equalization and average voltage recovery.The design method is based on the graph theory connectivity, and the convergence of secondary voltage control and delay robustness are used as performance indexes of the distributed communication topology, which provides the basis for the design of a distributed secondary control strategy and realizes reactive power equalization and average voltage recovery of microgrid, thereby improving the overall power quality of the microgrid.

The invention relates to an AC / DC hybrid microgrid topology design method based on an energy router. The design method can separate a plurality of AC / DC submicrogrids, and directionally simulate various microgrid topological structures at present and in the future, so as to meet various requirements of microgrid research, including an urban campus-type microgrid, island-type microgrid, and family-type microgrid. The design and implementation of AC / DC hybrid microgrid, on the one hand, can effectively eliminate the negative characteristics such as intermittency and randomness of renewable energy output, provide reliable power supply to distribution network, and improve the efficiency of energy utilization; On the other hand, facing the future, the microgrid will gradually change from a single regional power supply system based on electric energy conversion, storage and transmission to an energy hub with simultaneous integration of multi-energy conversion and interaction such as naturalgas and thermal energy utilization. The hybrid AC / DC microgrid based on the energy router can integrate multiple types of energy systems, which lays a foundation for this.

The invention discloses a photovoltaic grid-connected multi-inverter system resonance observation method based on node mapping, comprising three parts: detecting the resonance frequency, determining aresonance center and evaluating the participation degree of each element. A network node admittance matrix is constructed based on a multi-inverter system node mapping model; feature values and feature vectors of the matrix are calculated, an approximate singular matrix is searched, and the reciprocals of the feature values and the frequency spectrum curve of frequencies are output; and the participation factor of each node under each resonant frequency is calculated, the position of the resonance center is determined, the resonance sensitivity of the nodes is compared, the sensitivity of each element is analyzed, and the resonance participation degree of each element is evaluated. According to the method, comprehensive resonance condition analysis can be carried out on a photovoltaic grid-connected multi-inverter system, the harmonic resonance analysis efficiency of the system is improved, a basis can be provided for the topological design and element type selection of a photovoltaicpower station, and a foundation can be laid for the research of a resonance suppression strategy.

The invention discloses an improved GAF (geographical adaptive fidelity) topology design method for a wireless sensor network. An energy acquisition module and a network topological structure control module are adopted, the sensor network is divided into a plurality of large areas, each large area is internally divided into a plurality of small areas, each small area stands for a small cluster, a small area cluster head is selected according to a cluster head election method while other nodes enters a sleep state, each large area stands for a large cluster, and a large cluster head is selected from multiple small cluster heads to perform information packaging and transmission. Nodes of the small areas transmit information to active nodes in the areas, the information is packaged through the active nodes and then transmitted to cluster heads of the large areas correspondingly, and the information is packaged by the cluster heads and transmitted to a base station. Life cycles of the nodes are prolonged, balancing of node energy states is realized, and relative stability of a node system is realized consequently.

The invention provides a synthesis persuasion business method WDM OTN. Wherein, building a persuasion chart model combined with virtual topological design, rout and wavelength allocation problem, calculating on the chart to find out proper persuasion path. For business request, using built optical link for persuasion. This invention uses dynamic regulation link weight to regulate dynamically whole network link weight at any moment to balance load, and saves optical transceiver resources to reduce cost.

The invention discloses an embedded system architecture configuration method. The method includes steps: step one, analyzing attributes of main elements included by each system in each item, and performing abstract modeling in terms of physical nodes, application and application deployment to generate configuration tools for a user to configure; step two, when the user carries out physical node configuration, application configuration and application deployment configuration through the configuration tools respectively, performing configuration verification, and correcting configuration according to verification results; step three, generating configuration files. The system architecture configuration method suitable for different buses and different platforms is designed and provided for an embedded system to realize definition of system elements, physical topology designs of the elements, design, generation and verification of logic links, configuration and deployment of application and functional modules, verification and analysis of system integral designs and generation of system configuration files and integrated engineering frameworks.

The invention discloses an integrated topology design method for an offshore wind farm based on HVDC transmission. The method is characterized in that each permanent magnet synchronous generator is equipped with a full-bridge diode rectifier and a DC / DC boost chopper to form a cascaded sub-module; a plurality of sub-modules are connected in series and parallel to form a DC transmission system of the offshore wind farm; any unit that requires maintenance or has a fault in a series branch can be isolated from the system by a natural commutation process and does not affect other normal units in the same branch. The method has the advantages of low cost, low power consumption, high efficiency, high reliability, simple control and the like, can enhance the robustness of the system, reduces theinfluence of equipment unit failure or maintenance on the system, and has important engineering value and significance.

The invention discloses a topological optimization method of a reflector antenna back frame structure for electrical performance. The topological optimization method comprises the following specific steps: (1) inputting initial structure parameters and electrical parameters of an antenna back frame; (2) defining topological design variables of an antenna back frame structure; (3) generating a weighting function; (4) establishing an antenna back frame structure finite element model; (5) carrying out finite element analysis on the antenna back frame structure; (6) outputting the node displacement of the antenna back frame structure; (7) calculating weighted flexibility; (8) calculating weighted sensitivity; (9) correcting the weighting sensitivity; (10) updating topology design variables byusing a criterion method; (11) judging whether requirements are met or not; and (12) outputting a topological design variable. According to the invention, topological optimization of the reflector antenna back frame structure oriented to electrical performance can be realized, and rigidity distribution of the reflector antenna back frame structure oriented to electrical performance is realized.