187 results about "Logic network" patented technology

A method of manages a set of managed forwarding elements that forward data between machines. The method configures (1) a first managed forwarding element to operate in a first network that uses first and second address spaces that at least partially overlap with each other, (2) a second managed forwarding element to operate in a second network that uses the first address space, and (3) a third managed forwarding element to operate in a third network that uses the second address space. A machine in the second network and a machine in the third network have an identical address that belongs to both the first and second address spaces. The method directs the first managed forwarding element to connect to the second and third managed forwarding elements in a manner that enables the first managed forwarding element to forward data from a machine in the first network to the machine in the second network via the second managed forwarding element.

A method for communication among mobile units and vehicular communication apparatus make it possible to automatically establish connection with a party who can provide required information on the basis of an environment or condition change of a driver or a vehicle or in response to a driver's request so as to permit communication with the party. An inter-vehicle communication apparatus of a vehicle acquires information from other mobile units through physical networks while it is moving or stopped, and registers, in a member table, mobile units satisfying predetermined conditions on the basis of the acquired information as the members of different virtual logic networks according to the conditions. In such a state, the inter-vehicle communication apparatus selects one virtual logic network from among a plurality of virtual logic networks on the basis of an environment or condition change of a driver or a vehicle or in response to a driver's request so as to permit communication with the party. The selected virtual logic network is set as an active network to establish connection with a predetermined mobile unit in the active network thereby to request or provide required information from or to the mobile unit.

A power supply connectable to a source of AC line voltage for AC electric arc welding by an AC arc current across a welding gap between an electrode and a workpiece, the power supply comprises a high capacity transformer that converts said line voltage to an AC output voltage, and a rectifier that converts the AC output voltage to a DC voltage between a positive terminal and a common terminal at generally zero volts and a negative terminal and the common terminal. The power supply has a first switch that connects the positive terminal to the common terminal across the gap when a gate signal is applied to the first switch, a second switch for connecting the negative terminal to the common terminal across the gap when a gate signal is applied to the second switch and a pulse width modulator operated for generating pulses at a frequency of at least about 18 kHz. A logic network has a first circuit for directing the pulses to the first switch for a first time, a second circuit for directing the pulses to the second switch for a second time and a controller to alternately operate first and second circuits to create AC arc welding current.

An amplifier having an active and passive gain stage connect to a load for driving a load according to a system analog input. A first embodiment of the amplifier in accordance with the present invention includes a logic network connected between a comparator network and a switching system, wherein the comparator network connects to the passive gain stage. Specifically, the active gain stage may include an active filter connected to receive an analog or digital input and provide a difference between the analog or digital input and the feedback signal relative to the gain factor of a gain unit connected to the active filter. The passive gain stage includes a passive filter. The logic network generates at least one switching signal which controls the switching system that includes at least one switching device to selectively provide power to the load. An output signal from the switching system provides output for the amplifier and is fed back to the active gain stage. In another embodiment, the output is a two-level signal and the passive and active filters are second order low pass filters, where the gain factor is about 25 or more. In yet another embodiment, the gain factor is approximately 250. Moreover, the amplifier may include a digital delta-sigma modulator connected to supply a two level input.

The invention discloses a message sending method and device and relates to the communication field. The message sending method and device solve the problem that due to the fact that a message located on a source VM of a certain VDC and sent to a target VM of a cross-physical data center cannot be transmitted through an exclusive VPN channel of the VDC, the QOS of the VDC cannot be guaranteed. According to the scheme, a source CE device receives a VXLAN message sent by a VTEP, wherein the VXLAN message contains an original data message to be sent to the target VM by the source VM and the VXLAN identification of a logic network where the source VM is located; the source CE device acquires the information of a first interface correspondingly used by the source VDC where the source VM is located according to the VXLAN identification of a logic network where the source VM is located; the source CE device sends the VXLAN message through the first interface to provide the VXLAN message for the target VM by utilizing the VPN channel of the source VDC correspondingly bound by the first interface. The message sending method and device are used for sending messages.

A system and method are disclosed for waveform based variational static timing analysis. A circuit is divided into its linear circuit parts and non-linear circuit parts and modeled together, by a combination of linear modeling techniques, into linear equations that may be represented by matrices. The linear equations in matrix form may be readily solved by a computer such that an input waveform to an input pin of the circuit can be sequentially “pushed” through the various interconnects and logic networks of the circuit to an output pin. Output voltage waveforms are obtained at each stage of the waveform pushing and may be used to perform static timing analysis.

A DC-to-DC converter incorporates a transformer having a primary winding connected to a pair of DC input terminals via an active switch, which turns on and off under the control of a feedback circuit, and a secondary winding connected to a pair of DC output terminals via a synchronous rectifier and a smoothing capacitor. The synchronous rectifier is a parallel connection of a synchronous rectifier switch and a diode. A synchronous rectifier control circuit is connected to the synchronous rectifier switch for causing conduction therethrough while the active switch is off. The synchronous rectifier control circuit comprises a capacitor for determination of the conducting periods of the synchronous rectifier switch, and a logic network for on/off control of the synchronous rectifier switch according to whether the active switch is on or off and whether the capacitor voltage is higher than a predefined threshold or not.

This invention relates to a method for reconfiguring a network of parallel functional elements tolerant to the faults of these functional elements including said basic functional elements (P), spare functional elements (Sp), interconnecting elements (Cm) of these functional elements and a control unit, said method comprising:a step of positioning the functional elements of the logic network on the physical network;a routing step of programming interconnecting elements on the physical network, by choosing a maximum number of interconnecting elements which can be passed between two neighbouring processors using a shortest track search algorithm.

A network or interconnect structure which includes a plurality of nodes which are interconnected within a hierarchical multiple level structure. The level of each node is determined by the position of the node within the structure and data messages move from node to node from a source level to a destination level. Each node within the interconnect structure is capable of receiving simultaneous data messages at its input ports from any other node and the receiving node is able to transmit each of the received data messages through its output ports to separate nodes in the interconnect structure to one or more levels below the level of the receiving node.

Disclosed is a system and method for eliminating the unnecessary toggling of logic in a logic network. The method and system can be incorporated directly into logic synthesis software, or may be implemented manually. Provided is a mechanism for identifying critical nets and then inserting net latches at the critical nets wherein each net latch is controlled by an enable signal that also controls a related output latch. Each net latch is comprised of a circuit which can on command hold static the last logic level on a given logic node.

The invention provides a service bandwidth expansion method in cloud computing network virtualization. The service bandwidth expansion method comprises the following steps: associating logic network cards, corresponding to a plurality of physical network cards of a physical server, in an operating system with a virtual network card; writing the name of the virtual network card into a management database of a virtual switch to enable the virtual network card to be a port for communicating the virtual switch with a physical switch; writing the name of a network card of at least one virtual machine into the management database of the virtual switch to enable the network card of at least one virtual machine to be a port for communicating the virtual switch with at least one virtual machine. According to the method, by writing the network card of the virtual machine and the virtual network card into the management database of the virtual switch, any one data stream of the virtual machine is split and is sent to the physical network cards, so that the network bandwidth can be elastically expanded by services of any protocol in the virtual machine according to the quantity of users and the change of bandwidth requirements of the users under the condition that the total bandwidth is unchanged.

The invention discloses a nonlinear production plan optimization method applied to oil refineries, which includes the steps: firstly, setting up an oil refining production logic network; secondly, setting up process modules of an atmospheric and vacuum CDU (crude distillation unit) and a FCC (fluid catalytic cracking) unit; thirdly, inputting all constraint condition data and determining a target function in two-stage search; and fourthly, using the mixed searching method to optimally determine production plan decision variables. The genetic algorithm and direct search algorithm are combined on the basis of the simulation modeling technique, global profits of an oil refinery production plan can be effectively increased without destroying the constraint conditions, tremendous computation generated during solving of complex production plan problems can be avoided, and optimized solutions can be quickly obtained. The nonlinear production plan optimization method is simple in principle, convenient in implementation, high in transportability and applicable to different production plan environments.

A programmable frequency divider circuit with symmetrical output is disclosed. The frequency divider includes a non-symmetrical LFSR based component operated in series with a symmetrical divider component. Both the LFSR and the symmetrical divider may be programmed to provide flexibility. The frequency divider can dynamically adjust the divisor of the LFSR component to overcome limitations in the divide resolution due to the series combination of dividers, providing even and odd divisor values. The divider architecture can also provide higher level functions, including synchronization of multiple divider outputs, dynamic switching of divisor values and generation of multi-phased and spaced outputs. The linear feedback shift register (LFSR) component includes a feedback logic network decomposed into multiple stages to realize a maximum latch-to-latch operational latency of one gate delay regardless of the size of the LFSR.

The invention discloses a network path finding method, an optimal path selecting method and a system thereof. The method comprises the steps: pre-establishing a topology file consisting of logic network nodes, an arc and magnitudes on the arc, wherein the arc is the connecting line between the two logic network nodes and the magnitudes on the arc are weights given to the arc; collecting actual data information of the topology file with different studying magnitudes and respectively updating the topology file; figuring out the shortest path between a first logic network node as the start and a second logic network node as the end by a path finding method of the shortest path between two nodes according to the topology file after each updating; and selecting the corresponding shortest path as the optimal path according to different studying magnitudes. The method can collect actual data information of the topology file with different studying magnitudes and respectively updates the topology file, figure out the shortest path according to the topology file after each updating, and precisely work out the optimal path between the start and the end or the logic nodes.

A peer-to-peer network is based on TCP/IP protocol to form logic network of layerless structure between abstract peer-to-peer entities in completely equal status, each entity can be a server providing service to other entities or customer end served by other entities, the concrete way of realizing and entity is specific software example operating on computer or special information terminal equipment. This method can realize centerless exchanger of no center server light burden peer-to-peer network status, any fire-proof bulkhead of NAT router, any entity log on to net can know if other coherent entities are online at once by certification and inform on-line entities about its no-line information.

A plurality of PLC adapters, such as a master 21 and slaves 22, are connected to a power line 11, which forms a PLC logic network 16. Electric apparatuses 48, such as a television monitor and a video recorder, are connected to the master 21 and the slaves 22 through repeaters 31. The master 21 is a control terminal having the function of QoS controller. The master 21 allocates timeslots for transmitting data over a network, acquires information on the actual data transmission rate detected by a data receiving terminal, and modifies the timeslot allocated to target data on the basis of the acquired information on the actual data transmission rate.

Methods and systems are described for obtaining a sequence of data decisions and an error signal generated by one or more samplers operating on a received input signal according to a sampling clock, applying the sequence of data decisions and the error signal to each logic branch of a set of logic branches, and responsively selecting a logic branch from the set of logic branches, the logic branch selected responsive to (i) a detection of a transitional data pattern in the sequence of data decisions and (ii) the error signal, the selected logic branch generating an output current, and providing the output current to a local oscillator controller, the output current sourcing and sinking current to a capacitor through a resistive element to adjust an input voltage of a proportional control circuit relative to a voltage on the capacitor connected to the resistive element.