127 results about "Virtual structure" patented technology

Aggregation switches are connected to an edge node by a multi-chassis link aggregation group and a virtual fiber link provides a connection for exchange of information between the aggregation switches regarding MAC addressing to synchronize MAC address tables across the aggregation switches. When failure of the virtual fiber link is detected, the multi-chassis link aggregation group is reconfigured into two or more link aggregates with each link aggregate connecting the edge node to one of the aggregation switches. A spanning tree protocol is initiated over the link aggregates to prevent loops in the network. MAC address tables are flushed and relearned with the two or more link aggregates.

Method, apparatus, and systems for implementing Quality of Service (QoS) within high performance fabrics. A multi-level QoS scheme is implemented including virtual fabrics, Traffic Classes, Service Levels (SLs), Service Channels (SCs) and Virtual Lanes (VLs). SLs are implemented for Layer 4 (Transport Layer) end-to-end transfer of fabric packets, while SCs are used to differentiate fabric packets at the Link Layer. Fabric packets are divided into flits, with fabric packet data transmitted via fabric links as flits streams. Fabric switch input ports and device receive ports detect SC IDs for received fabric packets and implement SC-to-VL mappings to determine VL buffers to buffer fabric packet flits in. An SL may have multiple SCs, and SC-to-SC mapping may be implemented to change the SC for a fabric packet as it is forwarded through the fabric, while maintaining its SL. A Traffic Class may include multiple SLs, enabling request and response traffic for an application to employ separate SLs.

The invention advances the technology of virtual data warehousing: by allowing data to be organized in any of a number of virtual structures without the need for replication; by allowing the data to be accessed through the virtual structure at speeds in excess of those for conventional methods; by allowing data to be searched at significantly higher speeds, using a new indexing technology that enables tables to be indexed by data external to themselves, thus removing the need for complex joins; and by providing a workable security model for compartmenting access to both the data and the indices used to support searching.

A method and system for computer assisted orthopedic feedback of at least one surgical object relative a pre-operative plan are disclosed. The pre-operative plan includes a virtual object, which is the virtual representation of the surgical object, and a virtual structure, which is the virtual representation of the patient structure. The method comprises providing the pre-operative plan including planned position and orientation of the virtual object relative to of the virtual structure; obtaining the position of the patient structure based on a surface of the patient structure using a surgical navigation system; obtaining the position of the surgical object using the surgical navigation system; registering the patient structure to the virtual structure and the surgical object to the virtual object; tracking a current position and orientation of the surgical object using the surgical navigation system; and providing feedback of a current position and orientation of the surgical object relative to the planned position and orientation of the virtual object based on the tracked current position and orientation of the surgical object.

A virtual chassis system includes a plurality of network nodes configured with a master virtual chassis address. The network nodes are connected by virtual fabric link (VFLs) that provide a connection for exchange of data packets between the network nodes. The data packets include source MAC addresses and associated hardware device information, such as source chassis ID, source network interface identifier and source port identifier information. The network nodes use this information to maintain synchronized MAC address tables for forwarding of data packets in the virtual chassis system. One or more control protocols in the network node are used for topology discovery, master network node election, generation of routing tables, health monitoring and other functions.

A virtual chassis system includes a plurality of network nodes configured with a master virtual chassis address. The network nodes are connected by virtual fabric link (VFLs) that provide a connection for exchange of packets between the network nodes. The packets include source MAC addresses and associated hardware device information, such as source chassis ID, source network interface identifier and source port identifier information. The network nodes use this information to maintain synchronized MAC address tables for forwarding of packets in the virtual chassis system.

Trunking with port aggregation for fabric ports in a Fibre Channel (FC) fabric and attached devices is described. In some examples, a method of establishing a connection between a node and the FC fabric includes: negotiating a first link between a first trunking node port in the node with a first trunking fabric port in the FC fabric; creating a trunking port channel with the first link as a first member, the trunking port channel supporting a plurality of virtual fabrics; logging in a logical interface for each of the plurality of virtual fabrics to the FC fabric over the trunking port channel; negotiating a second link between a second trunking node port in the node and a second trunking fabric port in the FC fabric; and adding the second link to the trunking port channel as a second member aggregated with the first member.

The invention discloses an augmented reality and remote control method based on indoor positioning and an electronic compass. The convenient and efficient intelligent household equipment control experience is provided for a user in an augmented reality mode. In the smart home environment, a three-dimensional coordinate system is established in advance, and intelligent equipment is calibrated to the three-dimensional coordinate system to serve as a recognized target point. The augmented reality and remote control method is based on the wireless and wired mixed control in an ordinary smart home, whether there is a barrier between a mobile intelligent terminal and controlled equipment or not does not need to be taken into consideration, imaging can still be carried out on a display device of the intelligent terminal through the augmented reality technology, the position of the controlled equipment is displayed, and control is convenient. The augmented reality and remote control method has the advantages that an extra hardware device and a house three-dimensional virtual structure picture do not need to be purchased; the operation interface is not single, button search is quick, and operation is easy; a complex directory structure does not need to be memorized, and accidental touch does not occur easily; the operation interface and the actual scene are fused, and visuality and flexibility are high.

In a computerized method, and a computer-readable medium encoded with programming instructions for implementing the method, multiple layers of packages stacked on a load carrier are virtually constructed in a computer and, for each of the layers, an automatic determination is made with regard to the additive pressure that each layer exerts on the respective layers therebelow in the stack. The packages are organized in the multiple layers in the virtual construction dependent on predetermined constraints for the respective additive pressures, and the virtual construction is made available at an output of the computer in a form allowing the actual loading of the load carrier with the packages to be guided.

A virtual chassis system includes a plurality of network nodes connected by virtual fabric link (VFLs) that provide a connection for exchange of packets between the network nodes. A network node in the virtual chassis system is operable in a pass thru mode. In pass thru mode, the network node receives packets over a VFL and transparently forwards the packet over another VFL to another network node in the virtual chassis system. However, the network node 110 disables other port interfaces, such as port interfaces connected to external nodes from the virtual chassis system. The network node 110 in pass thru mode is operable to receive management commands over one or more VFLs and can still be managed through management commands.

A method and associated computer program product for developing an Information Technology (IT) system. An abstract IT structure for the IT system is provided. A virtual IT structure for the IT system is generated from the abstract IT structure by a translator. A real IT structure for the IT system is generated from the virtual IT structure.

The invention discloses a UAV (unmanned aerial vehicle) fleet bilateral remote control system and method thereof based on vision and force sense feedback. The system comprises a master end, a slave end and a communication module, wherein the master end comprises a hand controller and a control computer, the slave end comprises a UAV virtual proxy point, a UAV fleet, a distance sensor and an image acquiring module. An operator can control all virtual structural points by the single hand controller, and the virtual structural points and the UAV adopt bidirectional tracking mechanism to control formation movement of the UAV fleet. When the UAV fleet encounters environment obstacles, force feedback signals are provided for the UAV to change posture and control change of fleet formation on one hand and for the master end so that the operator can obtain force sense immediacy sense on the other hand. Meanwhile, cameras are installed on each UAV, vision ranges of the cameras can be adjusted by a steering engine, overall view of the slave end can be provided for the operator, and finally the operator can obtain the force sense and the vision immediacy sense at the same time.

The invention provides a method for controlling an unmanned aerial vehicle formation by imitating bird flock behaviors and using virtual structures. According to the method, a bird flock formation structure is mapped into an unmanned aerial vehicle formation structure to build an optimal formation position of the unmanned aerial vehicle formation; control commands are calculated through a virtual structure model; then unmanned aerial vehicles are controlled to arrive at a designated position by an unmanned aerial vehicle control unit which receives the formation control commands. The method for controlling an unmanned aerial vehicle formation by imitating bird flock behaviors and using virtual structures comprises following steps: 1. a mathematical model of the unmanned aerial vehicle formation is established; 2. a formation control position is determined through bird flock behaviors; 3. a virtual structure of the unmanned aerial vehicle formation is established; 4. formation control input is obtained through a mixed method of bird flock behaviors and virtual structures; 5. formation control is carried out by use of the mixed method of bird flock behaviors and virtual structures. The method makes full use of the simplicity and universality of the bird flock behavior mechanism and virtual structure method in the formation control law design; continuous and stable control of unmanned aerial vehicles under formation condition is guaranteed.

A system ensures payment for the purchase of merchandise carried through a checkout aisle on the lower tray of a shopping cart. For that purpose, the system includes a controller with an embedded program for identifying a virtual structure substantially equivalent to the physical structure of the tray. Further, the system includes a sensor that determines when a cart is positioned at the checkout aisle. The system also includes a camera for creating an image of the physical structure of the tray and transmitting the image to the controller. The controller includes a means for activating the embedded program to compare the image with the virtual structure. As a result of the comparison, the controller determines whether merchandise is on the physical structure of the tray. During the comparison, the controller removes the virtual structure from the image.

A virtual chassis system includes a plurality of network nodes configured with a master virtual chassis address. The network nodes are connected by virtual fabric link (VFLs) that provide a connection for exchange of packets between the network nodes. The virtual chassis system is operable to provide warnings to help prevent a virtual chassis split event in response to an administrative action. The topology of the virtual chassis system is analyzed to determine the possible impact of one or more administrative actions. Based on this analysis, a warning is generated when an administrative action is requested that may lead directly or indirectly to a virtual chassis split.

The invention relates to a four-rotor unmanned aerial vehicle formation flight control method, and aims to realize multi-unmanned aerial vehicle distributed formation control in the presence of inter-vehicle airflow interference and acquisition information constraints. The technical scheme is characterized in that, according to the multi-unmanned aerial vehicle formation control method based on the virtual structure method and a second-order sliding mode algorithm, virtual structure method is used for analyzing a formation system; and aiming at the constraint that part of unmanned aerial vehicles cannot directly obtain the state of a virtual rigid body, and by considering airflow interference among the unmanned aerial vehicles, a multi-unmanned-aerial-vehicle position loop kinetic model isestablished, then the model is simplified into a double-integral model containing disturbance terms, and then a nonlinear controller is designed to achieve formation control. The method is mainly applied to unmanned aerial vehicle formation flight control occasions.

The invention provides a modeling of an evolvable virtual FPGA structural model based on n input LUTs and a mapping method thereof. The modeling takes arbitrary n input LUTs as basic units of circuit evolution, and a virtual FPGA array structure is formed by the basic units; various virtual FPGA structural models of 2-5 input LUTs are analyzed and compared to obtain an optimal virtual FPGA structural model based on the 3 input LUT; meanwhile, the method maps the virtual structure into an actual FPGA underlying structure, thus realizing the direct operation on the configuration bit string of the FPGA underlying structure. Compared with the prior art, the virtual FPGA structural model set up by the invention can be utilized to improve the evolution efficiency and the utilization rate of FPGA logical resource. Furthermore, the invention has good flexibility and universality.

Layered third-party (enhanced) application software redundancy is provided in a non-homogeneous virtual chassis including two or more switches coupled via a virtual fabric link. A virtual chassis management module within at least one of the switches discovers the other switches within the virtual chassis, determines a base master switch from all of the switches in the virtual chassis, detects an enhanced application installed on at least one enhanced switch and determines an enhanced master switch from the enhanced switches.